apache commons math - Page 319

Good Form for Random Number Generator?

- by JackCJR

I wanted to get a few opinions on doing a random number generator. I read through a couple different ways to do it and this is the way that I created after doing a little reading. Is it acceptable form? Any foreseeable issues? function master(){ function generate(){ var pickFrom= "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; var j = pickFrom.length; var i = Math.floor(Math.random()*j+1); //Generates a random number var code = pickFrom.charAt(i) //Picks a number based on what number was picked. document.write(code) } x = 1; while(x){ generate(); x--; } } master();

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date.getHours() to calendar.hour

- by user1487045

I want to get the hour of day in 24hour cycle. I know that date.getHours() is depreciated. But I'm tempted to use it since I cant get the same result out of calendar.hour call. Can anyone tell me how to fix what I have below to get the hours out correctly with calendar.hour? ...much appreciated. Date d = new Date(); Calendar c = Calendar.getInstance(); c.setTime(d); System.out.println("hour: "+Math.abs(c.HOUR-24)+", mins: "+Math.abs(c.MINUTE-60)+", d.h: "+d.getHours() +", d.m: "+d.getMinutes());

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Proper Translation of equation to C#

- by Shykin

I am trying to replicate this equation: Slope(b) = (NSXY - (SX)(SY)) / (NSX2 - (SX)2) in C# but I'm getting the following issue: If I make the average of X = 1 + 2 + 3 + 4 + 5 and the average Y = 5 + 4 + 3 + 2 + 1 it gives me a positive slope even though it is clearly counting down. If I place the same numbers into this calculator: http://www.easycalculation.com/statistics/regression.php It gives me a negative slope in the linked calculator with the same data. I'm trying to narrow down the reasons so is the following a proper translation from equation to C# code: Slope(b) = (NSXY - (SX)(SY)) / (NSX2 - (SX)2) to Slope (m) = ((x * avgX * avgY) - (avgX * avgY)) / ((x * Math.Pow(avgX, 2)) - Math.Pow(avgX, 2));

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nginx: problem configuring a proxy_pass

- by Ofer Bar

I'm converting a web app from apache to nginx. In apache's httpd.conf I have: ProxyPass /proxy/ http:// ProxyPassReverse /proxy/ http:// The idea is the client send this url: http://web-server-domain/proxy/login-server-addr/loginUrl.php?user=xxx&pass=yyy and the web server calls: http://login-server-addr/loginUrl.php?user=xxx&pass=yyy My nginx.conf is attached below and it is not working. At the moment it looks like it is calling the server, but returning an application error. This seems promising but any attempt to debug this failed! I can't trace any of the calls as nginx refuses to place them in the error file. Also, placing echo statement on the login server did not help either which is weird. The nginx documentation isn't very helpful about this. Any suggestion on how to configure a proxy_pass? Thanks! user nginx; worker_processes 1; #error_log /var/log/nginx/error.log; error_log /var/log/nginx/error.log notice; #error_log /var/log/nginx/error.log info; pid /var/run/nginx.pid; events { worker_connections 1024; } http { include /etc/nginx/mime.types; default_type application/octet-stream; log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_x_forwarded_for"'; access_log /var/log/nginx/access.log main; sendfile on; #tcp_nopush on; #keepalive_timeout 0; keepalive_timeout 65; #gzip on; # # The default server # server { rewrite_log on; listen 80; server_name _; #charset koi8-r; #access_log logs/host.access.log main; #root /var/www/live/html; index index.php index.html index.htm; location ~ ^/proxy/(.*$) { #location /proxy/ { # rewrite ^/proxy(.*) http://$1 break; proxy_set_header X-Forwarded-Host $host; proxy_set_header X-Forwarded-Server $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_buffering off; proxy_pass http://$1; #proxy_pass "http://173.231.134.36/messages_2.7.0/loginUser.php?userID=ofer.fly%40gmail.com&password=y4HTD93vrshMNcy2Qr5ka7ia0xcaa389f4885f59c9"; break; } location / { root /var/www/live/html; #if ( $uri ~ ^/proxy/(.*) ) { # proxy_pass http://$1; # break; #} #try_files $uri $uri/ /index.php; } error_page 404 /404.html; #location = /404.html { # root /usr/share/nginx/html; #} # redirect server error pages to the static page /50x.html # #error_page 500 502 503 504 /50x.html; #location = /50x.html { # root /usr/share/nginx/html; #} # proxy the PHP scripts to Apache listening on 127.0.0.1:80 # #location ~ \.php$ { # proxy_pass http://127.0.0.1; #} # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000 # location ~ \.php$ { #root html; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; #fastcgi_param SCRIPT_FILENAME /usr/share/nginx/html$fastcgi_script_name; fastcgi_param SCRIPT_FILENAME /var/www/live/html$fastcgi_script_name; include fastcgi_params; } # deny access to .htaccess files, if Apache's document root # concurs with nginx's one # #location ~ /\.ht { # deny all; #} } # Load config files from the /etc/nginx/conf.d directory include /etc/nginx/conf.d/*.conf; }

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Varnish POST problem "9 FetchError c backend write error: 11" for application/x-www-form-urlencoded content

- by ompap

Cutting a longish story short, we have managed to get a more precise error out of Varnishlog. Varnishlog tells us that we are sending a 31 TxRequest - POST 31 TxHeader - Content-Type: application/x-www-form-urlencoded but we are getting 9 FetchError c backend write error: 11 31 BackendClose - [backend name] 9 VCL_call c error 9 VCL_return c deliver 9 Length c 488 9 VCL_call c deliver 9 VCL_return c deliver 9 TxProtocol c HTTP/1.1 9 TxStatus c 503 We still do not know what this is exactly, but apparently Content-Type: application/x-www-form-urlencoded is not getting through as it should. Help still needed, please! Original message below. The title was "Varnish not letting Joomla users to log in - 503 guru meditation error", but I changed it to get more attention to the problem and not to the symptoms. Hello, We have a production site for a local newspaper which is currently behind an Apache reverse proxy, basicly the site on one server and the other being reserved as a reverse proxy only (well, there is more but that has no relevance here). Apache as a reverse proxy works, but could be faster. We want to change the reverse proxy to use Varnish instead of Apache on an Ubuntu 10.4 Server. The Varnish is version 2.10 installed directly from Ubuntu repos. Ubuntu 10.4 uses PHP 5.3.2. For anonymous surfers the site works wonderfully with Varnish. So far we can get very good speed out of Varnish, we just have a few problems with logging in or out. The big one is, that the users cannot log in: they get a Varnish 503 error page every time. The logs do not reveal the cause. It feels as if the request would never leave Varnish. So we are merely guessing - not a strong starting point. We have gone through what has been suggested on various plces on the web. We have increased the timeouts to backend xxx { .host = "xxx.xx"; .port = "http"; .connect_timeout = 60s; .first_byte_timeout = 60s; .between_bytes_timeout = 60s; } but we seem to get the 503 guru error page much faster than that, as in approx. 5 seconds. We have increased the Varnish headers size to 128 in daemon. In vcl_recv we have if (req.http.Authenticate || req.http.Authorization) { return(pass); } and in vcl_fetch ## auhtentication handling if (req.http.Authenticate || req.http.Authorization) { return(pass); } We do not strip cookies. We have tried to make sure that error pages are not cached. As said above, we cannot see anything in the backend Apache logs, apparently it never gets asked for Joomla user authentication. Varnish does not seem to get much mentioning with connection to Joomla. (We cannot dump Joomla, that selection has been done and we just have to live with what we have been given) Has anyone a working Varnish - Joomla combination? Thanks for reading. Please help. We need some hints - desperately. Any suggestions? ompap

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http.conf setup to simplify using 'localhost:81'

- by Will

I'm installing portable wampserver within my dropbox folder so I can access anywhere. I have this achieved and accessible using http://locahost:81 I want to access it by using a different address (dropping the :81 port number) such as http://myothersite. I'm fairly certain I need to add a virtualhosts directove somewhere within this, but I am not Apache experienced! This is the current Apache httpd.conf file: ServerRoot "C:/Users/will/Dropbox/Wampee-2.1-beta-2/bin/apache/apache2.2.17" Listen 81 ServerAdmin admin@localhost ServerName localhost:81 DocumentRoot "C:/Users/will/Dropbox/Wampee-2.1-beta-2/www/" <Directory /> Options FollowSymLinks AllowOverride None Order deny,allow Deny from all </Directory> <Directory "C:/Users/will/Dropbox/Wampee-2.1-beta-2/www/"> Options Indexes FollowSymLinks AllowOverride all # onlineoffline tag - don't remove Order Deny,Allow Deny from all Allow from 127.0.0.1 </Directory> <IfModule dir_module> DirectoryIndex index.php index.php3 index.html index.htm </IfModule> <FilesMatch "^\.ht"> Order allow,deny Deny from all Satisfy All </FilesMatch> ErrorLog "C:/Users/will/Dropbox/Wampee-2.1-beta-2/logs/apache_error.log" LogLevel warn <IfModule log_config_module> LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined LogFormat "%h %l %u %t \"%r\" %>s %b" common <IfModule logio_module> LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio </IfModule> CustomLog "C:/Users/will/Dropbox/Wampee-2.1-beta-2/logs/access.log" common #CustomLog "logs/access.log" combined </IfModule> <IfModule alias_module> ScriptAlias /cgi-bin/ "cgi-bin/" </IfModule> <IfModule cgid_module> #Scriptsock logs/cgisock </IfModule> <Directory "cgi-bin"> AllowOverride None Options None Order allow,deny Allow from all </Directory> DefaultType text/plain <IfModule mime_module> TypesConfig conf/mime.types AddType application/x-compress .Z AddType application/x-gzip .gz .tgz AddType application/x-httpd-php .php AddType application/x-httpd-php .php3 </IfModule> # Server-pool management (MPM specific) #Include conf/extra/httpd-mpm.conf # Multi-language error messages #Include conf/extra/httpd-multilang-errordoc.conf # Fancy directory listings Include conf/extra/httpd-autoindex.conf # Language settings #Include conf/extra/httpd-languages.conf # User home directories #Include conf/extra/httpd-userdir.conf # Real-time info on requests and configuration #Include conf/extra/httpd-info.conf # Virtual hosts #Include conf/extra/httpd-vhosts.conf # Local access to the Apache HTTP Server Manual #Include conf/extra/httpd-manual.conf # Distributed authoring and versioning (WebDAV) #Include conf/extra/httpd-dav.conf # Various default settings #Include conf/extra/httpd-default.conf # Secure (SSL/TLS) connections #Include conf/extra/httpd-ssl.conf # # Note: The following must must be present to support # starting without SSL on platforms with no /dev/random equivalent # but a statically compiled-in mod_ssl. # <IfModule ssl_module> SSLRandomSeed startup builtin SSLRandomSeed connect builtin </IfModule> Include "C:/Users/will/Dropbox/Wampee-2.1-beta-2/alias/*" Include "C:/Users/will/Dropbox/Wampee-2.1-beta-2/MyWebAp ps/etc/alias/*"

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Nginx - Redirect any Subdomain to File without Rewriting

- by Waffle

Recently I have switched from Apache to Nginx to increase performance on a web server running Ubuntu 11.10. I have been having issues trying to figure out how certain things work in Nginx compared to Apache, but one issue has been stumping me and I have not been able to find the answer online. My problem is that I need to be able to redirect (not rewrite) any sub-domain to a file, but that file needs to be able to get the sub-domain part of the URL in order to do a database look-up of that sub-domain. So far, I have been able to get any sub-domain to rewrite to that file, but then it loses the text of the sub-domain I need. So, for example, I would like test.server.com to redirect to server.com/resolve.php, but still remain as test.server.com. If this is not possible, the thing that I would need at the very least would be something such as going to test.server.com would go to server.com/resolve.php?=test . One of these options must be possible in Nginx. My config as it stands right now looks something like this: server { listen 80; ## listen for ipv4; this line is default and implied listen [::]:80 default ipv6only=on; ## listen for ipv6 root /usr/share/nginx/www; index index.php index.html index.htm; # Make site accessible from http://localhost/ server_name www.server.com server.com; location / { # First attempt to serve request as file, then # as directory, then fall back to index.html try_files $uri $uri/ /index.html; } location /doc { root /usr/share; autoindex on; allow 127.0.0.1; } location /images { root /usr/share; autoindex off; } #error_page 404 /404.html; # redirect server error pages to the static page /50x.html # #error_page 500 502 503 504 /50x.html; #location = /50x.html { # root /usr/share/nginx/www; #} # proxy the PHP scripts to Apache listening on 127.0.0.1:80 # #location ~ \.php$ { # proxy_pass http://127.0.0.1; #} # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000 # location ~ \.php$ { fastcgi_pass unix:/tmp/php5-fpm.sock; fastcgi_index index.php; include fastcgi_params; } # deny access to .htaccess files, if Apache's document root # concurs with nginx's one # #location ~ /\.ht { # deny all; #} } server { listen 80 default; server_name *.server.com; rewrite ^ http://www.server.com/resolve.php; } As I said before, I am very new to Nginx, so I have a feeling the answer is pretty simple, but no examples online seem to deal with just redirects without rewrites or rewriting with the sub-domain section included. Any help on what to do would be most appreciated and if any one has a better idea to accomplish what I need, I am also open to ideas. Thank you very much.

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VirtualServer reverseproxy works locally, but not from client

- by Yep

Setup: 2 Webservers pointed to 127.0.0.1:8080 and :8081. Curl validates they work as expected. Apache with the following virt hosts: NameVirtualHost 192.168.1.1:80 <VirtualHost 192.168.1.1:80> ServerAdmin [email protected] ProxyPass / http://127.0.0.1:8080/ ProxyPassReverse / http://127.0.0.1:8080/ ServerName 192.168.1.1 ServerAlias http://192.168.1.1 </VirtualHost> NameVirtualHost 192.168.1.2:80 <VirtualHost 192.168.1.2:80> ServerAdmin [email protected] ProxyPass / http://127.0.0.1:8081/ ProxyPassReverse / http://127.0.0.1:8081/ ServerName 192.168.1.2 ServerAlias http://192.168.1.2 </VirtualHost> On the server I can curl to the virtualhosts and receive appropriate responses. (curl 192.168.1.1 gives me the webservers response from localhost:8080, etc) remote hosts cannot however connect to 192.168.1.1 or .2 at all. What am I missing? Re: comments Yes, the default directory Directive is still in place. # Deny access to root file system <Directory /> Options None AllowOverride None Order Deny,Allow deny from all </Directory> No apache logs are generated when trying to reach 192.168.1.1 remotely. They do get generated when curl from local. If I point the webservers to *:8080 and *:8081 instead of binding to localhost, I can access them from a remote host via 192.168.1.1 and 192.168.1.2 if i specify the 8080 and 8081 ports (both ports work on both IP's, which is what I'm trying to avoid with apache reverse proxy bind to 80 on each interface) Edit2: curl verbose output: (similar for second webserver, and for 127.0.0.1:portnum) [user@host mingle_12_2_1]$ curl -v 192.168.1.1 * About to connect() to 192.168.1.1 port 80 * Trying 192.168.1.1... connected * Connected to 192.168.1.1 (192.168.1.1) port 80 > GET / HTTP/1.1 > User-Agent: curl/7.15.5 (x86_64-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5 > Host: 192.168.1.1 > Accept: */* > < HTTP/1.1 302 Found < Date: Tue, 16 Oct 2012 16:22:08 GMT < Server: Jetty(6.1.19) < Cache-Control: no-cache < Location: http://192.168.1.1/install < X-Runtime: 130 < Content-Type: text/html; charset=utf-8 < Content-Length: 94 < Connection: close Closing connection #0 <html><body>You are being <a href="http://192.168.1.1/install">redirected</a>.</body></html> log from the request local 192.168.1.1 - - [16/Oct/2012:12:22:08 -0400] "GET / HTTP/1.1" 302 94 no apache access log or error log generated when requests from remote clients.

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What's going on with my server? High load, lots of idle CPU time, low disk utilization

- by Jonathan

I run a web site and send a legitimate opt-in, daily email newsletter to subscribers. Both the web hosting and email sending are done by the same machine. I have about 100,000 subscribers who have opted in to my daily email newsletter. My PHP script did a pretty good job sending mail to all of them until fairly recently, but as the list has grown I can't keep up. When I run top, I have very high load--usually at least 6 or 7, sometimes as high as 15--even though I only have two CPUs. However, when I run sar, my CPU is idle an average of about 30% of the time. So, it seems I'm not CPU bound. When I run iostat, it seems as though I'm not disk bound because my %util for each device is very low (no more than 5%). Given that I don't seem to be CPU bound or disk bound, why is top reporting such high load? Additionally, since I don't seem to be CPU bound or disk bound, why is my email sending script not able to keep up? Here's what I see when running top: top - 11:33:28 up 74 days, 18:49, 2 users, load average: 7.65, 8.79, 8.28 Tasks: 168 total, 5 running, 162 sleeping, 0 stopped, 1 zombie Cpu(s): 38.9%us, 58.6%sy, 0.8%ni, 0.0%id, 0.7%wa, 0.2%hi, 0.8%si, 0.0%st Mem: 3083012k total, 2144436k used, 938576k free, 281136k buffers Swap: 2048248k total, 39164k used, 2009084k free, 1470412k cached Here's what I see when running iostat -mx: avg-cpu: %user %nice %system %iowait %steal %idle 34.80 1.20 55.24 0.37 0.00 8.38 Device: rrqm/s wrqm/s r/s w/s rMB/s wMB/s avgrq-sz avgqu-sz await svctm %util sda 0.19 71.70 1.59 29.45 0.02 0.07 5.90 0.55 17.82 1.16 3.59 sda1 0.00 0.00 0.00 0.00 0.00 0.00 7.10 0.00 13.80 13.72 0.00 sda2 0.05 50.45 1.13 24.57 0.01 0.29 24.25 0.35 13.43 1.15 2.97 sda3 0.05 10.17 0.20 2.33 0.01 0.05 43.75 0.05 20.96 2.45 0.62 sda4 0.00 0.00 0.00 0.00 0.00 0.00 2.00 0.00 70.50 70.50 0.00 sda5 0.07 0.22 0.03 0.07 0.00 0.00 32.84 0.08 856.19 8.03 0.08 sda6 0.02 5.45 0.03 0.72 0.00 0.02 67.55 0.02 26.72 5.26 0.39 sda7 0.00 1.56 0.00 0.42 0.00 0.01 38.04 0.00 8.88 5.84 0.24 sda8 0.01 3.84 0.20 1.35 0.00 0.02 28.55 0.05 31.90 4.08 0.63 Here's what I see when running sar: 09:40:02 AM CPU %user %nice %system %iowait %steal %idle 09:50:01 AM all 30.59 1.01 49.80 0.23 0.00 18.37 10:00:08 AM all 31.73 0.92 51.66 0.13 0.00 15.55 10:10:06 AM all 30.43 0.99 48.94 0.26 0.00 19.38 10:20:01 AM all 29.58 1.00 47.76 0.25 0.00 21.42 10:30:01 AM all 29.37 1.02 47.30 0.18 0.00 22.13 10:40:06 AM all 32.50 1.01 52.94 0.16 0.00 13.39 10:50:01 AM all 30.49 1.00 49.59 0.15 0.00 18.77 11:00:01 AM all 29.43 0.99 47.71 0.17 0.00 21.71 11:10:07 AM all 30.26 0.93 49.48 0.83 0.00 18.50 11:20:02 AM all 29.83 0.81 48.51 1.32 0.00 19.52 11:30:06 AM all 31.18 0.88 51.33 1.15 0.00 15.47 Average: all 26.21 1.15 42.62 0.48 0.00 29.54 Here are the top handful of processes listed at the particular time I happened to run top -c: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 8180 mysql 16 0 57448 19m 2948 S 26.6 0.7 4702:26 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --pid-file=/var/lib/mysql/bristno.pid --skip-external-locking 26956 brristno 17 0 0 0 0 Z 8.0 0.0 0:00.24 [php] <defunct> 26958 brristno 17 0 94408 43m 37m R 5.0 1.4 0:00.15 /usr/bin/php /home/brristno/public_html/dbv.php 22852 nobody 16 0 9628 2900 1524 S 0.7 0.1 0:00.17 /usr/local/apache/bin/httpd -k start -DSSL 8591 brristno 34 19 96896 13m 6652 S 0.3 0.4 0:29.82 /usr/local/bin/php /home/brristno/bin/mailer.php 1qwqyb6 i0gbor 24469 nobody 16 0 9628 2880 1508 S 0.3 0.1 0:00.08 /usr/local/apache/bin/httpd -k start -DSSL 25495 nobody 15 0 9628 2876 1500 S 0.3 0.1 0:00.06 /usr/local/apache/bin/httpd -k start -DSSL 26149 nobody 15 0 9628 2864 1504 S 0.3 0.1 0:00.04 /usr/local/apache/bin/httpd -k start -DSSL

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JBoss https on port other than 8080 not working

- by MilindaD

We have a server with two JBoss instances where one runs on 8080, the other on 8081. We need to have HTTPS enabled for the 8081 server, firstly we tried enabling https on the 8080 port instance by generating the keystore and editing the server.xml and it successfully worked. However when we tried the same thing for 8081 it did not, note that we removed https for the 8080 server first before enabling it for 8081. This is what was used for both server.xml for 8080 and 8081. The only difference was that the port was changed from 8080 to 8081 when trying to enable https for 8081 port instance. What am I doing wrong and what needs to be changed? NOTE : When I meant enabled for 8080 I meant when you visit https:// URL:8484 you will actually be visiting the 8080 port instance. However when ssl is enabled for 8081 and I visit https:// URL:8484 I get that the web page is unavailable. COMMENTLESS VERSION <Server> <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" /> <Listener className="org.apache.catalina.core.JasperListener" /> <Service name="jboss.web">  <Connector port="8080" address="${jboss.bind.address}" maxThreads="350" maxHttpHeaderSize="8192" emptySessionPath="true" protocol="HTTP/1.1" enableLookups="false" redirectPort="8443" acceptCount="100" connectionTimeout="20000" disableUploadTimeout="true" compression="on" ompressableMimeType="text/html,text/css,text/javascript,application/json,text/xml,text/plain,application/x-javascript,application/javascript"/> <Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true" maxThreads="150" scheme="https" secure="true" clientAuth="false" sslProtocol="TLS" address="${jboss.bind.address}" keystoreFile="${jboss.server.home.dir}/conf/supun1.keystore" keystorePass="aaaaaa" truststoreFile="${jboss.server.home.dir}/conf/supun1.keystore" truststorePass="aaaaaa" />  <Connector port="8009" address="${jboss.bind.address}" protocol="AJP/1.3" emptySessionPath="true" enableLookups="false" redirectPort="8443" /> <Engine name="jboss.web" defaultHost="localhost" jvmRoute="khms1"> <Realm className="org.jboss.web.tomcat.security.JBossSecurityMgrRealm" certificatePrincipal="org.jboss.security.auth.certs.SubjectDNMapping" allRolesMode="authOnly" /> <Host name="localhost" autoDeploy="false" deployOnStartup="false" deployXML="false" configClass="org.jboss.web.tomcat.security.config.JBossContextConfig" > <Valve className="org.jboss.web.tomcat.service.sso.ClusteredSingleSignOn" /> <Valve className="org.jboss.web.tomcat.service.jca.CachedConnectionValve" cachedConnectionManagerObjectName="jboss.jca:service=CachedConnectionManager" transactionManagerObjectName="jboss:service=TransactionManager" /> </Host> </Engine> </Service> </Server> WITH COMMENTS VERSION <Server>  <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />  <Listener className="org.apache.catalina.core.JasperListener" />  <Service name="jboss.web">  <Connector port="8080" address="${jboss.bind.address}" maxThreads="350" maxHttpHeaderSize="8192" emptySessionPath="true" protocol="HTTP/1.1" enableLookups="false" redirectPort="8443" acceptCount="100" connectionTimeout="20000" disableUploadTimeout="true" compression="on" ompressableMimeType="text/html,text/css,text/javascript,application/json,text/xml,text/plain,application/x-javascript,application/javascript"/>   <Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true" maxThreads="150" scheme="https" secure="true" clientAuth="false" sslProtocol="TLS" address="${jboss.bind.address}" keystoreFile="${jboss.server.home.dir}/conf/supun1.keystore" keystorePass="aaaaaa" truststoreFile="${jboss.server.home.dir}/conf/supun1.keystore" truststorePass="aaaaaa" />  <Connector port="8009" address="${jboss.bind.address}" protocol="AJP/1.3" emptySessionPath="true" enableLookups="false" redirectPort="8443" /> <Engine name="jboss.web" defaultHost="localhost" jvmRoute="khms1">  <Realm className="org.jboss.web.tomcat.security.JBossSecurityMgrRealm" certificatePrincipal="org.jboss.security.auth.certs.SubjectDNMapping" allRolesMode="authOnly" />  <Host name="localhost" autoDeploy="false" deployOnStartup="false" deployXML="false" configClass="org.jboss.web.tomcat.security.config.JBossContextConfig" >        <Valve className="org.jboss.web.tomcat.service.sso.ClusteredSingleSignOn" />  <Valve className="org.jboss.web.tomcat.service.jca.CachedConnectionValve" cachedConnectionManagerObjectName="jboss.jca:service=CachedConnectionManager" transactionManagerObjectName="jboss:service=TransactionManager" /> </Host> </Engine> </Service> </Server>

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Solaris 11.1: Changes to included FOSS packages

- by alanc

Besides the documentation changes I mentioned last time, another place you can see Solaris 11.1 changes before upgrading is in the online package repository, now that the 11.1 packages have been published to http://pkg.oracle.com/solaris/release/, as the “0.175.1.0.0.24.2” branch. (Oracle Solaris Package Versioning explains what each field in that version string means.) When you’re ready to upgrade to the packages from either this repo, or the support repository, you’ll want to first read How to Update to Oracle Solaris 11.1 Using the Image Packaging System by Pete Dennis, as there are a couple issues you will need to be aware of to do that upgrade, several of which are due to changes in the Free and Open Source Software (FOSS) packages included with Solaris, as I’ll explain in a bit. Solaris 11 can update more readily than Solaris 10 In the Solaris 10 and older update models, the way the updates were built constrained what changes we could make in those releases. To change an existing SVR4 package in those releases, we created a Solaris Patch, which applied to a given version of the SVR4 package and replaced, added or deleted files in it. These patches were released via the support websites (originally SunSolve, now My Oracle Support) for applying to existing Solaris 10 installations, and were also merged into the install images for the next Solaris 10 update release. (This Solaris Patches blog post from Gerry Haskins dives deeper into that subject.) Some of the restrictions of this model were that package refactoring, changes to package dependencies, and even just changing the package version number, were difficult to do in this hybrid patch/OS update model. For instance, when Solaris 10 first shipped, it had the Xorg server from X11R6.8. Over the first couple years of update releases we were able to keep it up to date by replacing, adding, & removing files as necessary, taking it all the way up to Xorg server release 1.3 (new version numbering begun after the X11R7 split of the X11 tree into separate modules gave each module its own version). But if you run pkginfo on the SUNWxorg-server package, you’ll see it still displayed a version number of 6.8, confusing users as to which version was actually included. We stopped upgrading the Xorg server releases in Solaris 10 after 1.3, as later versions added new dependencies, such as HAL, D-Bus, and libpciaccess, which were very difficult to manage in this patching model. (We later got libpciaccess to work, but HAL & D-Bus would have been much harder due to the greater dependency tree underneath those.) Similarly, every time the GNOME team looked into upgrading Solaris 10 past GNOME 2.6, they found these constraints made it so difficult it wasn’t worthwhile, and eventually GNOME’s dependencies had changed enough it was completely infeasible. Fortunately, this worked out for both the X11 & GNOME teams, with our management making the business decision to concentrate on the “Nevada” branch for desktop users - first as Solaris Express Desktop Edition, and later as OpenSolaris, so we didn’t have to fight to try to make the package updates fit into these tight constraints. Meanwhile, the team designing the new packaging system for Solaris 11 was seeing us struggle with these problems, and making this much easier to manage for both the development teams and our users was one of their big goals for the IPS design they were working on. Now that we’ve reached the first update release to Solaris 11, we can start to see the fruits of their labors, with more FOSS updates in 11.1 than we had in many Solaris 10 update releases, keeping software more up to date with the upstream communities. Of course, just because we can more easily update now, doesn’t always mean we should or will do so, it just removes the package system limitations from forcing the decision for us. So while we’ve upgraded the X Window System in the 11.1 release from X11R7.6 to 7.7, the Solaris GNOME team decided it was not the right time to try to make the jump from GNOME 2 to GNOME 3, though they did update some individual components of the desktop, especially those with security fixes like Firefox. In other parts of the system, decisions as to what to update were prioritized based on how they affected other projects, or what customer requests we’d gotten for them. So with all that background in place, what packages did we actually update or add between Solaris 11.0 and 11.1? Core OS Functionality One of the FOSS changes with the biggest impact in this release is the upgrade from Grub Legacy (0.97) to Grub 2 (1.99) for the x64 platform boot loader. This is the cause of one of the upgrade quirks, since to go from Solaris 11.0 to 11.1 on x64 systems, you first need to update the Boot Environment tools (such as beadm) to a new version that can handle boot environments that use the Grub2 boot loader. System administrators can find the details they need to know about the new Grub in the Administering the GRand Unified Bootloader chapter of the Booting and Shutting Down Oracle Solaris 11.1 Systems guide. This change was necessary to be able to support new hardware coming into the x64 marketplace, including systems using UEFI firmware or booting off disk drives larger than 2 terabytes. For both platforms, Solaris 11.1 adds rsyslog as an optional alternative to the traditional syslogd, and OpenSCAP for checking security configuration settings are compliant with site policies. Note that the support repo actually has newer versions of BIND & fetchmail than the 11.1 release, as some late breaking critical fixes came through from the community upstream releases after the Solaris 11.1 release was frozen, and made their way to the support repository. These are responsible for the other big upgrade quirk in this release, in which to upgrade a system which already installed those versions from the support repo, you need to either wait for those packages to make their way to the 11.1 branch of the support repo, or follow the steps in the aforementioned upgrade walkthrough to let the package system know it's okay to temporarily downgrade those. Developer Stack While Solaris 11.0 included Python 2.7, many of the bundled python modules weren’t packaged for it yet, limiting its usability. For 11.1, many more of the python modules include 2.7 versions (enough that I filtered them out of the below table, but you can always search on the package repository server for them. For other language runtimes and development tools, 11.1 expands the use of IPS mediated links to choose which version of a package is the default when the packages are designed to allow multiple versions to install side by side. For instance, in Solaris 11.0, GNU automake 1.9 and 1.10 were provided, and developers had to run them as either automake-1.9 or automake-1.10. In Solaris 11.1, when automake 1.11 was added, also added was a /usr/bin/automake mediated link, which points to the automake-1.11 program by default, but can be changed to another version by running the pkg set-mediator command. Mediated links were also used for the Java runtime & development kits in 11.1, changing the default versions to the Java 7 releases (the 1.7.0.x package versions), while allowing admins to switch links such as /usr/bin/javac back to Java 6 if they need to for their site, to deal with Java 7 compatibility or other issues, without having to update each usage to use the full versioned /usr/jdk/jdk1.6.0_35/bin/javac paths for every invocation. Desktop Stack As I mentioned before, we upgraded from X11R7.6 to X11R7.7, since a pleasant coincidence made the X.Org release dates line up nicely with our feature & code freeze dates for this release. (Or perhaps it wasn’t so coincidental, after all, one of the benefits of being the person making the release is being able to decide what schedule is most convenient for you, and this one worked well for me.) For the table below, I’ve skipped listing the packages in which we use the X11 “katamari” version for the Solaris package version (mainly packages combining elements of multiple upstream modules with independent version numbers), since they just all changed from 7.6 to 7.7. In the graphics drivers, we worked with Intel to update the Intel Integrated Graphics Processor support to support 3D graphics and kernel mode setting on the Ivy Bridge chipsets, and updated Nvidia’s non-FOSS graphics driver from 280.13 to 295.20. Higher up in the desktop stack, PulseAudio was added for audio support, and liblouis for Braille support, and the GNOME applications were built to use them. The Mozilla applications, Firefox & Thunderbird moved to the current Extended Support Release (ESR) versions, 10.x for each, to bring up-to-date security fixes without having to be on Mozilla’s agressive 6 week feature cycle release train. Detailed list of changes This table shows most of the changes to the FOSS packages between Solaris 11.0 and 11.1. As noted above, some were excluded for clarity, or to reduce noise and duplication. All the FOSS packages which didn't change the version number in their packaging info are not included, even if they had updates to fix bugs, security holes, or add support for new hardware or new features of Solaris. Package11.011.1 archiver/unrar 3.8.5 4.1.4 audio/sox 14.3.0 14.3.2 backup/rdiff-backup 1.2.1 1.3.3 communication/im/pidgin 2.10.0 2.10.5 compress/gzip 1.3.5 1.4 compress/xz not included 5.0.1 database/sqlite-3 3.7.6.3 3.7.11 desktop/remote-desktop/tigervnc 1.0.90 1.1.0 desktop/window-manager/xcompmgr 1.1.5 1.1.6 desktop/xscreensaver 5.12 5.15 developer/build/autoconf 2.63 2.68 developer/build/autoconf/xorg-macros 1.15.0 1.17 developer/build/automake-111 not included 1.11.2 developer/build/cmake 2.6.2 2.8.6 developer/build/gnu-make 3.81 3.82 developer/build/imake 1.0.4 1.0.5 developer/build/libtool 1.5.22 2.4.2 developer/build/makedepend 1.0.3 1.0.4 developer/documentation-tool/doxygen 1.5.7.1 1.7.6.1 developer/gnu-binutils 2.19 2.21.1 developer/java/jdepend not included 2.9 developer/java/jdk-6 1.6.0.26 1.6.0.35 developer/java/jdk-7 1.7.0.0 1.7.0.7 developer/java/jpackage-utils not included 1.7.5 developer/java/junit 4.5 4.10 developer/lexer/jflex not included 1.4.1 developer/parser/byaccj not included 1.14 developer/parser/java_cup not included 0.10 developer/quilt 0.47 0.60 developer/versioning/git 1.7.3.2 1.7.9.2 developer/versioning/mercurial 1.8.4 2.2.1 developer/versioning/subversion 1.6.16 1.7.5 diagnostic/constype 1.0.3 1.0.4 diagnostic/nmap 5.21 5.51 diagnostic/scanpci 0.12.1 0.13.1 diagnostic/wireshark 1.4.8 1.8.2 diagnostic/xload 1.1.0 1.1.1 editor/gnu-emacs 23.1 23.4 editor/vim 7.3.254 7.3.600 file/lndir 1.0.2 1.0.3 image/editor/bitmap 1.0.5 1.0.6 image/gnuplot 4.4.0 4.6.0 image/library/libexif 0.6.19 0.6.21 image/library/libpng 1.4.8 1.4.11 image/library/librsvg 2.26.3 2.34.1 image/xcursorgen 1.0.4 1.0.5 library/audio/pulseaudio not included 1.1 library/cacao 2.3.0.0 2.3.1.0 library/expat 2.0.1 2.1.0 library/gc 7.1 7.2 library/graphics/pixman 0.22.0 0.24.4 library/guile 1.8.4 1.8.6 library/java/javadb 10.5.3.0 10.6.2.1 library/java/subversion 1.6.16 1.7.5 library/json-c not included 0.9 library/libedit not included 3.0 library/libee not included 0.3.2 library/libestr not included 0.1.2 library/libevent 1.3.5 1.4.14.2 library/liblouis not included 2.1.1 library/liblouisxml not included 2.1.0 library/libtecla 1.6.0 1.6.1 library/libtool/libltdl 1.5.22 2.4.2 library/nspr 4.8.8 4.8.9 library/openldap 2.4.25 2.4.30 library/pcre 7.8 8.21 library/perl-5/subversion 1.6.16 1.7.5 library/python-2/jsonrpclib not included 0.1.3 library/python-2/lxml 2.1.2 2.3.3 library/python-2/nose not included 1.1.2 library/python-2/pyopenssl not included 0.11 library/python-2/subversion 1.6.16 1.7.5 library/python-2/tkinter-26 2.6.4 2.6.8 library/python-2/tkinter-27 2.7.1 2.7.3 library/security/nss 4.12.10 4.13.1 library/security/openssl 1.0.0.5 (1.0.0e) 1.0.0.10 (1.0.0j) mail/thunderbird 6.0 10.0.6 network/dns/bind 9.6.3.4.3 9.6.3.7.2 package/pkgbuild not included 1.3.104 print/filter/enscript not included 1.6.4 print/filter/gutenprint 5.2.4 5.2.7 print/lp/filter/foomatic-rip 3.0.2 4.0.15 runtime/java/jre-6 1.6.0.26 1.6.0.35 runtime/java/jre-7 1.7.0.0 1.7.0.7 runtime/perl-512 5.12.3 5.12.4 runtime/python-26 2.6.4 2.6.8 runtime/python-27 2.7.1 2.7.3 runtime/ruby-18 1.8.7.334 1.8.7.357 runtime/tcl-8/tcl-sqlite-3 3.7.6.3 3.7.11 security/compliance/openscap not included 0.8.1 security/nss-utilities 4.12.10 4.13.1 security/sudo 1.8.1.2 1.8.4.5 service/network/dhcp/isc-dhcp 4.1 4.1.0.6 service/network/dns/bind 9.6.3.4.3 9.6.3.7.2 service/network/ftp (ProFTPD) 1.3.3.0.5 1.3.3.0.7 service/network/samba 3.5.10 3.6.6 shell/conflict 0.2004.9.1 0.2010.6.27 shell/pipe-viewer 1.1.4 1.2.0 shell/zsh 4.3.12 4.3.17 system/boot/grub 0.97 1.99 system/font/truetype/liberation 1.4 1.7.2 system/library/freetype-2 2.4.6 2.4.9 system/library/libnet 1.1.2.1 1.1.5 system/management/cim/pegasus 2.9.1 2.11.0 system/management/ipmitool 1.8.10 1.8.11 system/management/wbem/wbemcli 1.3.7 1.3.9.1 system/network/routing/quagga 0.99.8 0.99.19 system/rsyslog not included 6.2.0 terminal/luit 1.1.0 1.1.1 text/convmv 1.14 1.15 text/gawk 3.1.5 3.1.8 text/gnu-grep 2.5.4 2.10 web/browser/firefox 6.0.2 10.0.6 web/browser/links 1.0 1.0.3 web/java-servlet/tomcat 6.0.33 6.0.35 web/php-53 not included 5.3.14 web/php-53/extension/php-apc not included 3.1.9 web/php-53/extension/php-idn not included 0.2.0 web/php-53/extension/php-memcache not included 3.0.6 web/php-53/extension/php-mysql not included 5.3.14 web/php-53/extension/php-pear not included 5.3.14 web/php-53/extension/php-suhosin not included 0.9.33 web/php-53/extension/php-tcpwrap not included 1.1.3 web/php-53/extension/php-xdebug not included 2.2.0 web/php-common not included 11.1 web/proxy/squid 3.1.8 3.1.18 web/server/apache-22 2.2.20 2.2.22 web/server/apache-22/module/apache-sed 2.2.20 2.2.22 web/server/apache-22/module/apache-wsgi not included 3.3 x11/diagnostic/xev 1.1.0 1.2.0 x11/diagnostic/xscope 1.3 1.3.1 x11/documentation/xorg-docs 1.6 1.7 x11/keyboard/xkbcomp 1.2.3 1.2.4 x11/library/libdmx 1.1.1 1.1.2 x11/library/libdrm 2.4.25 2.4.32 x11/library/libfontenc 1.1.0 1.1.1 x11/library/libfs 1.0.3 1.0.4 x11/library/libice 1.0.7 1.0.8 x11/library/libsm 1.2.0 1.2.1 x11/library/libx11 1.4.4 1.5.0 x11/library/libxau 1.0.6 1.0.7 x11/library/libxcb 1.7 1.8.1 x11/library/libxcursor 1.1.12 1.1.13 x11/library/libxdmcp 1.1.0 1.1.1 x11/library/libxext 1.3.0 1.3.1 x11/library/libxfixes 4.0.5 5.0 x11/library/libxfont 1.4.4 1.4.5 x11/library/libxft 2.2.0 2.3.1 x11/library/libxi 1.4.3 1.6.1 x11/library/libxinerama 1.1.1 1.1.2 x11/library/libxkbfile 1.0.7 1.0.8 x11/library/libxmu 1.1.0 1.1.1 x11/library/libxmuu 1.1.0 1.1.1 x11/library/libxpm 3.5.9 3.5.10 x11/library/libxrender 0.9.6 0.9.7 x11/library/libxres 1.0.5 1.0.6 x11/library/libxscrnsaver 1.2.1 1.2.2 x11/library/libxtst 1.2.0 1.2.1 x11/library/libxv 1.0.6 1.0.7 x11/library/libxvmc 1.0.6 1.0.7 x11/library/libxxf86vm 1.1.1 1.1.2 x11/library/mesa 7.10.2 7.11.2 x11/library/toolkit/libxaw7 1.0.9 1.0.11 x11/library/toolkit/libxt 1.0.9 1.1.3 x11/library/xtrans 1.2.6 1.2.7 x11/oclock 1.0.2 1.0.3 x11/server/xdmx 1.10.3 1.12.2 x11/server/xephyr 1.10.3 1.12.2 x11/server/xorg 1.10.3 1.12.2 x11/server/xorg/driver/xorg-input-keyboard 1.6.0 1.6.1 x11/server/xorg/driver/xorg-input-mouse 1.7.1 1.7.2 x11/server/xorg/driver/xorg-input-synaptics 1.4.1 1.6.2 x11/server/xorg/driver/xorg-input-vmmouse 12.7.0 12.8.0 x11/server/xorg/driver/xorg-video-ast 0.91.10 0.93.10 x11/server/xorg/driver/xorg-video-ati 6.14.1 6.14.4 x11/server/xorg/driver/xorg-video-cirrus 1.3.2 1.4.0 x11/server/xorg/driver/xorg-video-dummy 0.3.4 0.3.5 x11/server/xorg/driver/xorg-video-intel 2.10.0 2.18.0 x11/server/xorg/driver/xorg-video-mach64 6.9.0 6.9.1 x11/server/xorg/driver/xorg-video-mga 1.4.13 1.5.0 x11/server/xorg/driver/xorg-video-openchrome 0.2.904 0.2.905 x11/server/xorg/driver/xorg-video-r128 6.8.1 6.8.2 x11/server/xorg/driver/xorg-video-trident 1.3.4 1.3.5 x11/server/xorg/driver/xorg-video-vesa 2.3.0 2.3.1 x11/server/xorg/driver/xorg-video-vmware 11.0.3 12.0.2 x11/server/xserver-common 1.10.3 1.12.2 x11/server/xvfb 1.10.3 1.12.2 x11/server/xvnc 1.0.90 1.1.0 x11/session/sessreg 1.0.6 1.0.7 x11/session/xauth 1.0.6 1.0.7 x11/session/xinit 1.3.1 1.3.2 x11/transset 0.9.1 1.0.0 x11/trusted/trusted-xorg 1.10.3 1.12.2 x11/x11-window-dump 1.0.4 1.0.5 x11/xclipboard 1.1.1 1.1.2 x11/xclock 1.0.5 1.0.6 x11/xfd 1.1.0 1.1.1 x11/xfontsel 1.0.3 1.0.4 x11/xfs 1.1.1 1.1.2 P.S. To get the version numbers for this table, I ran a quick perl script over the output from: % pkg contents -H -r -t depend -a type=incorporate -o fmri \ `pkg contents -H -r -t depend -a type=incorporate -o fmri [email protected],5.11-0.175.1.0.0.24` \ | sort /tmp/11.1 % pkg contents -H -r -t depend -a type=incorporate -o fmri \ `pkg contents -H -r -t depend -a type=incorporate -o fmri [email protected],5.11-0.175.0.0.0.2` \ | sort /tmp/11.0

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Injection of banners in my webbrowsers possible malware

- by Skadlig

Recently I have started to suspect that I have some kind of virus on my computer. There are 3 symptoms: Banners are being displayed on pages that doesn't use commercials, for instance when viewing screen-shots on Steam. It is only displayed after the rest of the page has been loaded and seems to be injected into it. The whole page is replaced with a commercial with the option to skip the commercial. The page is replaced with a search window claiming that the page could not be found. I have tried to scan my computer with Antivir and Adaware but only found a couple of tracking cookies. I have run HijackThis but since this isn't really my area I haven't been able to discern what shouldn't be there except the line about zonealarm since I have uninstalled it. Is there anyone out there who is able to see if there is anything suspicious in the log-file at the end or has suggestions regarding programs that might be better to find the virus than Antivir and Adaware? Here is the whole (long) log: Logfile of Trend Micro HijackThis v2.0.2 Scan saved at 21:44:07, on 2010-04-15 Platform: Unknown Windows (WinNT 6.01.3504) MSIE: Internet Explorer v8.00 (8.00.7600.16385) Boot mode: Normal Running processes: C:\Windows\SysWOW64\HsMgr.exe C:\Program Files (x86)\Personal\bin\Personal.exe F:\Program Files (x86)\Apache Software Foundation\Apache2.2\bin\ApacheMonitor.exe C:\Program Files (x86)\Avira\AntiVir Desktop\avgnt.exe F:\Program Files (x86)\PowerISO\PWRISOVM.EXE C:\Program Files (x86)\Java\jre6\bin\jusched.exe C:\Program Files\ASUS Xonar DX Audio\Customapp\ASUSAUDIOCENTER.EXE F:\Program Files (x86)\Voddler\service\VNetManager.exe C:\Program Files (x86)\Emotum\Mobile Broadband\Mobile.exe F:\Program Files\Logitech\SetPoint\x86\SetPoint32.exe C:\Program Files (x86)\Lavasoft\Ad-Aware\AAWTray.exe F:\Program Files (x86)\Mozilla Firefox\firefox.exe F:\Program Files (x86)\Trend Micro\HijackThis\HijackThis.exe R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896 R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157 R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157 R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896 R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896 R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157 R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch = R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page = C:\Windows\SysWOW64\blank.htm R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = F2 - REG:system.ini: UserInit=userinit.exe O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files (x86)\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll O2 - BHO: gwprimawega - {83bb5261-81ec-25ae-4adf-e88936738525} - C:\Windows\SysWow64\aZfJupUw.dll O2 - BHO: ZoneAlarm Toolbar Registrar - {8A4A36C2-0535-4D2C-BD3D-496CB7EED6E3} - C:\Program Files\CheckPoint\ZAForceField\WOW64\TrustChecker\bin\TrustCheckerIEPlugin.dll (file missing) O2 - BHO: Windows Live inloggningshjälpen - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files (x86)\Java\jre6\bin\jp2ssv.dll O3 - Toolbar: ZoneAlarm Toolbar - {EE2AC4E5-B0B0-4EC6-88A9-BCA1A32AB107} - C:\Program Files\CheckPoint\ZAForceField\WOW64\TrustChecker\bin\TrustCheckerIEPlugin.dll (file missing) O4 - HKLM..\Run: [avgnt] "C:\Program Files (x86)\Avira\AntiVir Desktop\avgnt.exe" /min O4 - HKLM..\Run: [PWRISOVM.EXE] f:\Program Files (x86)\PowerISO\PWRISOVM.EXE O4 - HKLM..\Run: [SunJavaUpdateSched] "C:\Program Files (x86)\Java\jre6\bin\jusched.exe" O4 - HKLM..\Run: [QuickTime Task] "F:\Program Files (x86)\QuickTime\QTTask.exe" -atboottime O4 - HKLM..\Run: [Adobe Reader Speed Launcher] "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\Reader_sl.exe" O4 - HKLM..\Run: [VoddlerNet Manager] f:\Program Files (x86)\Voddler\service\VNetManager.exe O4 - HKCU..\Run: [Steam] "f:\program files (x86)\steam\steam.exe" -silent O4 - HKCU..\Run: [msnmsgr] "C:\Program Files (x86)\Windows Live\Messenger\msnmsgr.exe" /background O4 - Global Startup: BankID Security Application.lnk = C:\Program Files (x86)\Personal\bin\Personal.exe O4 - Global Startup: Logitech SetPoint.lnk = ? O4 - Global Startup: Monitor Apache Servers.lnk = F:\Program Files (x86)\Apache Software Foundation\Apache2.2\bin\ApacheMonitor.exe O13 - Gopher Prefix: O16 - DPF: {1E54D648-B804-468d-BC78-4AFFED8E262F} (System Requirements Lab) - http://www.nvidia.com/content/DriverDownload/srl/3.0.0.4/srl_bin/sysreqlab_nvd.cab O16 - DPF: {4871A87A-BFDD-4106-8153-FFDE2BAC2967} (DLM Control) - http://dlcdnet.asus.com/pub/ASUS/misc/dlm-activex-2.2.5.0.cab O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab O17 - HKLM\System\CCS\Services\Tcpip..{5F7DB2E1-29C4-4299-A483-B68B19E9F015}: NameServer = 195.54.122.221 195.54.122.211 O17 - HKLM\System\CS1\Services\Tcpip..{5F7DB2E1-29C4-4299-A483-B68B19E9F015}: NameServer = 195.54.122.221 195.54.122.211 O17 - HKLM\System\CS2\Services\Tcpip..{5F7DB2E1-29C4-4299-A483-B68B19E9F015}: NameServer = 195.54.122.221 195.54.122.211 O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\Windows\System32\alg.exe (file missing) O23 - Service: Avira AntiVir Scheduler (AntiVirSchedulerService) - Avira GmbH - C:\Program Files (x86)\Avira\AntiVir Desktop\sched.exe O23 - Service: Avira AntiVir Guard (AntiVirService) - Avira GmbH - C:\Program Files (x86)\Avira\AntiVir Desktop\avguard.exe O23 - Service: Apache2.2 - Apache Software Foundation - F:\Program Files (x86)\Apache Software Foundation\Apache2.2\bin\httpd.exe O23 - Service: Dragon Age: Origins - Content Updater (DAUpdaterSvc) - BioWare - F:\Program Files (x86)\Dragon Age\bin_ship\DAUpdaterSvc.Service.exe O23 - Service: Device Error Recovery Service (dgdersvc) - Devguru Co., Ltd. - C:\Windows\system32\dgdersvc.exe O23 - Service: @%SystemRoot%\system32\efssvc.dll,-100 (EFS) - Unknown owner - C:\Windows\System32\lsass.exe (file missing) O23 - Service: @%systemroot%\system32\fxsresm.dll,-118 (Fax) - Unknown owner - C:\Windows\system32\fxssvc.exe (file missing) O23 - Service: @keyiso.dll,-100 (KeyIso) - Unknown owner - C:\Windows\system32\lsass.exe (file missing) O23 - Service: SAMSUNG KiesAllShare Service (KiesAllShare) - Unknown owner - F:\Program Files (x86)\Samsung\Kies\WiselinkPro\WiselinkPro.exe O23 - Service: Lavasoft Ad-Aware Service - Lavasoft - C:\Program Files (x86)\Lavasoft\Ad-Aware\AAWService.exe O23 - Service: Logitech Bluetooth Service (LBTServ) - Logitech, Inc. - C:\Program Files\Common Files\Logishrd\Bluetooth\LBTServ.exe O23 - Service: @comres.dll,-2797 (MSDTC) - Unknown owner - C:\Windows\System32\msdtc.exe (file missing) O23 - Service: MySQL - Unknown owner - F:\Program.exe (file missing) O23 - Service: @%SystemRoot%\System32\netlogon.dll,-102 (Netlogon) - Unknown owner - C:\Windows\system32\lsass.exe (file missing) O23 - Service: NVIDIA Display Driver Service (nvsvc) - Unknown owner - C:\Windows\system32\nvvsvc.exe (file missing) O23 - Service: Sony Ericsson OMSI download service (OMSI download service) - Unknown owner - f:\Program Files (x86)\Sony Ericsson\Sony Ericsson PC Suite\SupServ.exe O23 - Service: @%systemroot%\system32\psbase.dll,-300 (ProtectedStorage) - Unknown owner - C:\Windows\system32\lsass.exe (file missing) O23 - Service: @%systemroot%\system32\Locator.exe,-2 (RpcLocator) - Unknown owner - C:\Windows\system32\locator.exe (file missing) O23 - Service: @%SystemRoot%\system32\samsrv.dll,-1 (SamSs) - Unknown owner - C:\Windows\system32\lsass.exe (file missing) O23 - Service: ServiceLayer - Nokia. - C:\Program Files (x86)\PC Connectivity Solution\ServiceLayer.exe O23 - Service: @%SystemRoot%\system32\snmptrap.exe,-3 (SNMPTRAP) - Unknown owner - C:\Windows\System32\snmptrap.exe (file missing) O23 - Service: @%systemroot%\system32\spoolsv.exe,-1 (Spooler) - Unknown owner - C:\Windows\System32\spoolsv.exe (file missing) O23 - Service: @%SystemRoot%\system32\sppsvc.exe,-101 (sppsvc) - Unknown owner - C:\Windows\system32\sppsvc.exe (file missing) O23 - Service: Steam Client Service - Valve Corporation - C:\Program Files (x86)\Common Files\Steam\SteamService.exe O23 - Service: @%SystemRoot%\system32\ui0detect.exe,-101 (UI0Detect) - Unknown owner - C:\Windows\system32\UI0Detect.exe (file missing) O23 - Service: @%SystemRoot%\system32\vaultsvc.dll,-1003 (VaultSvc) - Unknown owner - C:\Windows\system32\lsass.exe (file missing) O23 - Service: @%SystemRoot%\system32\vds.exe,-100 (vds) - Unknown owner - C:\Windows\System32\vds.exe (file missing) O23 - Service: VoddlerNet - Voddler - f:\Program Files (x86)\Voddler\service\voddler.exe O23 - Service: @%systemroot%\system32\vssvc.exe,-102 (VSS) - Unknown owner - C:\Windows\system32\vssvc.exe (file missing) O23 - Service: @%systemroot%\system32\wbengine.exe,-104 (wbengine) - Unknown owner - C:\Windows\system32\wbengine.exe (file missing) O23 - Service: @%Systemroot%\system32\wbem\wmiapsrv.exe,-110 (wmiApSrv) - Unknown owner - C:\Windows\system32\wbem\WmiApSrv.exe (file missing) O23 - Service: @%PROGRAMFILES%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - C:\Program Files (x86)\Windows Media Player\wmpnetwk.exe (file missing) -- End of file - 8958 bytes

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How mod_cache working with "must-revalidate" and "max-age"?

- by Dmitriy Sosunov

Quick question before I will explain my flow: ?an mod_cache perform revalidate with if-none-match only if max-age is expired in case if it configured in reverse proxy mode? My goal is to reduce a number of revalidation requests to our the origin server. For instance: The first request goes to the origin server and then mod_cache save a response in to the cache according to header cache-control: max-age. And only when max-age is expired then mod_cache will revalidate with if-none-match. Currently, mod_cache revalidate each request, regardless that max-age is defined or not. My configuration of Apache 2.4.3 (Windows), on linux I see the same behavior that I will show below. ServerName proxy.lo ProxyRequests Off ProxyPreserveHost Off Header set Vary "Accept, Content-Type, Content-Encoding, Accept-Language" RequestHeader set X-Forwarded-Proto "http" # modify header for user agent's Header set Cache-Control "private, no-cache, no-store, no-transform" CacheQuickHandler off CacheDefaultExpire 300 # the origin server do not provide last-modified CacheIgnoreNoLastMod On CacheIgnoreCacheControl On # the origin server define cache-control: private, no-store only for user agents # Therefore, I would like ignore those headers on the proxy server. CacheStorePrivate On CacheStoreNoStore On CacheEnable disk / CacheRoot "C:/Apache.Cache" CacheDirLevels 5 CacheDirLength 4 CacheMinExpire 15 CacheDetailHeader on CacheHeader on KeepAlive Off ProxyPass / http://origin.lo/ ProxyPassReverse / http://origin.lo/ Also, I have turned on debug log level to see how mod_cache handles a content for caching: I provided this to show that mod_proxy always decides that a content isn't fresh. Why?I provided this to show that mod_proxy always decide that a content isn't fresh. Why? max-age was provided (see below). [Sun Nov 04 11:58:42.899890 2012] [cache:debug] [pid 6492:tid 1400] cache_storage.c(624): [client 192.168.1.100:63741] AH00698: cache: Key for entity /testpage?(null) is http://proxy.lo/testpage? [Sun Nov 04 11:58:42.899890 2012] [cache_disk:debug] [pid 6492:tid 1400] mod_cache_disk.c(569): [client 192.168.1.100:63741] AH00709: Recalled cached URL info header http://proxy.lo/testpage? [Sun Nov 04 11:58:42.899890 2012] [cache_disk:debug] [pid 6492:tid 1400] mod_cache_disk.c(865): [client 192.168.1.100:63741] AH00720: Recalled headers for URL http://proxy.lo/testpage? [Sun Nov 04 11:58:42.899890 2012] [cache:debug] [pid 6492:tid 1400] cache_storage.c(320): [client 192.168.1.100:63741] AH00695: Cached response for /testpage isn't fresh. Adding/replacing conditional request headers. [Sun Nov 04 11:58:42.899890 2012] [cache:debug] [pid 6492:tid 1400] mod_cache.c(414): [client 192.168.1.100:63741] AH00757: Adding CACHE_SAVE filter for /testpage [Sun Nov 04 11:58:42.899890 2012] [cache:debug] [pid 6492:tid 1400] mod_cache.c(448): [client 192.168.1.100:63741] AH00759: Adding CACHE_REMOVE_URL filter for /testpage [Sun Nov 04 11:58:42.899890 2012] [proxy:debug] [pid 6492:tid 1400] mod_proxy.c(1068): [client 192.168.1.100:63741] AH01143: Running scheme http handler (attempt 0) [Sun Nov 04 11:58:42.899890 2012] [proxy:debug] [pid 6492:tid 1400] proxy_util.c(1976): AH00942: HTTP: has acquired connection for (origin.lo) [Sun Nov 04 11:58:42.899890 2012] [proxy:debug] [pid 6492:tid 1400] proxy_util.c(2029): [client 192.168.1.100:63741] AH00944: connecting http://origin.lo/testpage to origin.lo:80 [Sun Nov 04 11:58:42.901890 2012] [proxy:debug] [pid 6492:tid 1400] proxy_util.c(2151): [client 192.168.1.100:63741] AH00947: connected /testpage to origin.lo:80 [Sun Nov 04 11:58:42.901890 2012] [proxy:debug] [pid 6492:tid 1400] proxy_util.c(2554): AH00962: HTTP: connection complete to 192.168.1.100:80 (origin.lo) [Sun Nov 04 11:58:42.903890 2012] [proxy:debug] [pid 6492:tid 1400] proxy_util.c(1991): AH00943: http: has released connection for (origin.lo) [Sun Nov 04 11:58:42.903890 2012] [headers:debug] [pid 6492:tid 1400] mod_headers.c(800): AH01502: headers: ap_headers_output_filter() [Sun Nov 04 11:58:42.903890 2012] [cache:debug] [pid 6492:tid 1400] mod_cache.c(1190): [client 192.168.1.100:63741] AH00769: cache: Caching url: /testpage [Sun Nov 04 11:58:42.903890 2012] [cache:debug] [pid 6492:tid 1400] mod_cache.c(1196): [client 192.168.1.100:63741] AH00770: cache: Removing CACHE_REMOVE_URL filter. [Sun Nov 04 11:58:42.904890 2012] [cache_disk:debug] [pid 6492:tid 1400] mod_cache_disk.c(1318): [client 192.168.1.100:63741] AH00737: commit_entity: Headers and body for URL http://proxy.lo/testpage? cached. The first request to the origin server without mod_proxy to http://origin.lo/ GET http://origin.lo/testpage HTTP/1.1 Host: origin.lo Connection: keep-alive User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4 Accept: application/json Accept-Encoding: gzip,deflate,sdch Accept-Language: en-US,en;q=0.8 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 The first response from the origin without mod_proxy HTTP/1.1 200 OK Cache-Control: must-revalidate, proxy-revalidate, max-age=30 Content-Type: application/json; charset=utf-8 ETag: "7cf651e2-176f-4ac1-808e-0e0c17cfd0a2" Server: Microsoft-IIS/7.5 X-AspNet-Version: 4.0.30319 X-Powered-By: ASP.NET Date: Sun, 04 Nov 2012 10:11:01 GMT Content-Length: 1877 So, I assumed that revalidation must be occur only in 30 seconds after the success response. Is't right? Let's check it:) Within 30 sec, the Google Chrome didn't perform any requests to the origin server to revalidate a request and has return the response from local cache. When max-age is expired, the Google Chrome perform a request to revalidate: GET http://origin.lo/testpage HTTP/1.1 Host: origin.lo Connection: keep-alive Cache-Control: max-age=0 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4 Accept: application/xml If-None-Match: "7cf651e2-176f-4ac1-808e-0e0c17cfd0a2" Accept-Encoding: gzip,deflate,sdch Accept-Language: en-US,en;q=0.8 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 and response: HTTP/1.1 304 Not Modified Cache-Control: must-revalidate, proxy-revalidate, max-age=30 ETag: "7cf651e2-176f-4ac1-808e-0e0c17cfd0a2" Server: Microsoft-IIS/7.5 X-AspNet-Version: 4.0.30319 X-Powered-By: ASP.NET Date: Sun, 04 Nov 2012 10:16:20 GMT As you can see, all works as expected. User agent revalidates request only when max-age is expired. Let's now try perform the folling flow though mod_proxy (see configuration above). The first request: GET http://proxy.lo/testpage HTTP/1.1 Host: proxy.lo Connection: keep-alive User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4 Accept: application/json Accept-Encoding: gzip,deflate,sdch Accept-Language: en-US,en;q=0.8 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 and the response was: HTTP/1.1 200 OK Date: Sun, 04 Nov 2012 10:23:36 GMT Server: Apache Cache-Control: private, no-cache, no-store, no-transform Content-Type: application/json; charset=utf-8 ETag: "7cf651e2-176f-4ac1-808e-0e0c17cfd0a2" Content-Length: 1932 Vary: Accept,Content-Type,Content-Encoding,Accept-Language X-Cache: MISS from proxy.lo X-Cache-Detail: "cache miss: attempting entity save" from proxy.lo Connection: close Ok, let's see to the disk cache and try to see how request and response was stored. (I cut binary data) http://proxy.lo/testpage? Cache-Control: private, no-cache, no-store, no-transform Content-Type: application/json; charset=utf-8 ETag: "7cf651e2-176f-4ac1-808e-0e0c17cfd0a2" Date: Sun, 04 Nov 2012 10:27:15 GMT Content-Length: 1932 Vary: Accept, Content-Type, Content-Encoding, Accept-Language Host: proxy.lo User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4 Accept: application/json Accept-Encoding: gzip,deflate,sdch Accept-Language: en-US,en;q=0.8 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 X-Forwarded-Proto: http Cache-Control: max-age=300, must-revalidate X-Forwarded-For: 192.168.1.100 X-Forwarded-Host: proxy.lo X-Forwarded-Server: origin.lo Ok, what we see? We see that the first request was performed with max-age=300 & must-revalidate Ok, looks good, as for me, lets perform the next call: GET http://proxy.lo/testpage HTTP/1.1 Host: proxy.lo Connection: keep-alive User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4 Accept: application/json Accept-Encoding: gzip,deflate,sdch Accept-Language: en-US,en;q=0.8 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 and the second response from mod_proxy: HTTP/1.1 200 OK Date: Sun, 04 Nov 2012 10:31:58 GMT Server: Apache Cache-Control: private, no-cache, no-store, no-transform ETag: "7cf651e2-176f-4ac1-808e-0e0c17cfd0a2" Content-Length: 1932 Vary: Accept,Content-Type,Content-Encoding,Accept-Language X-Cache: REVALIDATE from proxy.lo X-Cache-Detail: "conditional cache hit: entity refreshed" from proxy.lo Connection: close Content-Type: application/json; charset=utf-8 SO, MY QUESTION IS: WHY mod_proxy perform revalidation on each request regardless that max-age is defined? N.B. Apache 2.4.3 Thanks, I would be grateful for any help.

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What's the easiest way for a musician to make clips of their music freely availalbe?

- by Clay Nichols

I'm helping (pro bono) a really cool musician make samples of his music available so folks can share it. Essentially "shareware" for his music. Surely someone must have done this before. So far, I've found : http://sutros.com/ which is free but I've not read up on their Creative Commons license. And found a list here of other sites: http://www.vocalist.org.uk/artists_upload.html Any other suggestions?

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Good website for wallpapers

- by Gab Royer

What are the best websites for wallpapers? My current favorite is http://interfacelift.com. Do you guys have a single source where you get all your wallpapers or do you just stumble on them on the web? Compiled results Desktop Nexus Deviant Art Of course, Google Interfacelift Aeon Project Digital Blasphemy Gnome Look and Kde Look VladStudio Flickr Wikimedia Commons NASA's image of the day Customize.org Random Walls Astronomy Picture of the day Delicious popular/wallpaper tag Studio twentyEight Instant Shift Social Wallpapering Bing's Image search Mike Swanson's collection 4chan

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Open Source Excel training documentations?

- by William

I'm a trainer, basically. I'd like to find some sort of Excel-based training that's under the creative commons, or another awesome license. I want to use it to train others, and make it better. If this doesn't exist, I may have to write it. Because it should.

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How to obtain a random sub-datatable from another data table

- by developerit

Introduction In this article, I’ll show how to get a random subset of data from a DataTable. This is useful when you already have queries that are filtered correctly but returns all the rows. Analysis I came across this situation when I wanted to display a random tag cloud. I already had the query to get the keywords ordered by number of clicks and I wanted to created a tag cloud. Tags that are the most popular should have more chance to get picked and should be displayed larger than less popular ones. Implementation In this code snippet, there is everything you need. ' Min size, in pixel for the tag Private Const MIN_FONT_SIZE As Integer = 9 ' Max size, in pixel for the tag Private Const MAX_FONT_SIZE As Integer = 14 ' Basic function that retreives Tags from a DataBase Public Shared Function GetTags() As MediasTagsDataTable ' Simple call to the TableAdapter, to get the Tags ordered by number of clicks Dim dt As MediasTagsDataTable = taMediasTags.GetDataValide ' If the query returned no result, return an empty DataTable If dt Is Nothing OrElse dt.Rows.Count < 1 Then Return New MediasTagsDataTable End If ' Set the font-size of the group of data ' We are dividing our results into sub set, according to their number of clicks ' Example: 10 results -> [0,2] will get font size 9, [3,5] will get font size 10, [6,8] wil get 11, ... ' This is the number of elements in one group Dim groupLenth As Integer = CType(Math.Floor(dt.Rows.Count / (MAX_FONT_SIZE - MIN_FONT_SIZE)), Integer) ' Counter of elements in the same group Dim counter As Integer = 0 ' Counter of groups Dim groupCounter As Integer = 0 ' Loop througt the list For Each row As MediasTagsRow In dt ' Set the font-size in a custom column row.c_FontSize = MIN_FONT_SIZE + groupCounter ' Increment the counter counter += 1 ' If the group counter is less than the counter If groupLenth <= counter Then ' Start a new group counter = 0 groupCounter += 1 End If Next ' Return the new DataTable with font-size Return dt End Function ' Function that generate the random sub set Public Shared Function GetRandomSampleTags(ByVal KeyCount As Integer) As MediasTagsDataTable ' Get the data Dim dt As MediasTagsDataTable = GetTags() ' Create a new DataTable that will contains the random set Dim rep As MediasTagsDataTable = New MediasTagsDataTable ' Count the number of row in the new DataTable Dim count As Integer = 0 ' Random number generator Dim rand As New Random() While count < KeyCount Randomize() ' Pick a random row Dim r As Integer = rand.Next(0, dt.Rows.Count - 1) Dim tmpRow As MediasTagsRow = dt(r) ' Import it into the new DataTable rep.ImportRow(tmpRow) ' Remove it from the old one, to be sure not to pick it again dt.Rows.RemoveAt(r) ' Increment the counter count += 1 End While ' Return the new sub set Return rep End Function Pro’s This method is good because it doesn’t require much work to get it work fast. It is a good concept when you are working with small tables, let says less than 100 records. Con’s If you have more than 100 records, out of memory exception may occur since we are coping and duplicating rows. I would consider using a stored procedure instead.

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Integrating JavaScript Unit Tests with Visual Studio

- by Stephen Walther

Modern ASP.NET web applications take full advantage of client-side JavaScript to provide better interactivity and responsiveness. If you are building an ASP.NET application in the right way, you quickly end up with lots and lots of JavaScript code. When writing server code, you should be writing unit tests. One big advantage of unit tests is that they provide you with a safety net that enable you to safely modify your existing code – for example, fix bugs, add new features, and make performance enhancements -- without breaking your existing code. Every time you modify your code, you can execute your unit tests to verify that you have not broken anything. For the same reason that you should write unit tests for your server code, you should write unit tests for your client code. JavaScript is just as susceptible to bugs as C#. There is no shortage of unit testing frameworks for JavaScript. Each of the major JavaScript libraries has its own unit testing framework. For example, jQuery has QUnit, Prototype has UnitTestJS, YUI has YUI Test, and Dojo has Dojo Objective Harness (DOH). The challenge is integrating a JavaScript unit testing framework with Visual Studio. Visual Studio and Visual Studio ALM provide fantastic support for server-side unit tests. You can easily view the results of running your unit tests in the Visual Studio Test Results window. You can set up a check-in policy which requires that all unit tests pass before your source code can be committed to the source code repository. In addition, you can set up Team Build to execute your unit tests automatically. Unfortunately, Visual Studio does not provide “out-of-the-box” support for JavaScript unit tests. MS Test, the unit testing framework included in Visual Studio, does not support JavaScript unit tests. As soon as you leave the server world, you are left on your own. The goal of this blog entry is to describe one approach to integrating JavaScript unit tests with MS Test so that you can execute your JavaScript unit tests side-by-side with your C# unit tests. The goal is to enable you to execute JavaScript unit tests in exactly the same way as server-side unit tests. You can download the source code described by this project by scrolling to the end of this blog entry. Rejected Approach: Browser Launchers One popular approach to executing JavaScript unit tests is to use a browser as a test-driver. When you use a browser as a test-driver, you open up a browser window to execute and view the results of executing your JavaScript unit tests. For example, QUnit – the unit testing framework for jQuery – takes this approach. The following HTML page illustrates how you can use QUnit to create a unit test for a function named addNumbers(). <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title>Using QUnit</title> <link rel="stylesheet" href="http://github.com/jquery/qunit/raw/master/qunit/qunit.css" type="text/css" /> </head> <body> <h1 id="qunit-header">QUnit example</h1> <h2 id="qunit-banner"></h2> <div id="qunit-testrunner-toolbar"></div> <h2 id="qunit-userAgent"></h2> <ol id="qunit-tests"></ol> <div id="qunit-fixture">test markup, will be hidden</div> <script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script> <script type="text/javascript" src="http://github.com/jquery/qunit/raw/master/qunit/qunit.js"></script> <script type="text/javascript"> // The function to test function addNumbers(a, b) { return a+b; } // The unit test test("Test of addNumbers", function () { equals(4, addNumbers(1,3), "1+3 should be 4"); }); </script> </body> </html> This test verifies that calling addNumbers(1,3) returns the expected value 4. When you open this page in a browser, you can see that this test does, in fact, pass. The idea is that you can quickly refresh this QUnit HTML JavaScript test driver page in your browser whenever you modify your JavaScript code. In other words, you can keep a browser window open and keep refreshing it over and over while you are developing your application. That way, you can know very quickly whenever you have broken your JavaScript code. While easy to setup, there are several big disadvantages to this approach to executing JavaScript unit tests: You must view your JavaScript unit test results in a different location than your server unit test results. The JavaScript unit test results appear in the browser and the server unit test results appear in the Visual Studio Test Results window. Because all of your unit test results don’t appear in a single location, you are more likely to introduce bugs into your code without noticing it. Because your unit tests are not integrated with Visual Studio – in particular, MS Test -- you cannot easily include your JavaScript unit tests when setting up check-in policies or when performing automated builds with Team Build. A more sophisticated approach to using a browser as a test-driver is to automate the web browser. Instead of launching the browser and loading the test code yourself, you use a framework to automate this process. There are several different testing frameworks that support this approach: · Selenium – Selenium is a very powerful framework for automating browser tests. You can create your tests by recording a Firefox session or by writing the test driver code in server code such as C#. You can learn more about Selenium at http://seleniumhq.org/. LTAF – The ASP.NET team uses the Lightweight Test Automation Framework to test JavaScript code in the ASP.NET framework. You can learn more about LTAF by visiting the project home at CodePlex: http://aspnet.codeplex.com/releases/view/35501 jsTestDriver – This framework uses Java to automate the browser. jsTestDriver creates a server which can be used to automate multiple browsers simultaneously. This project is located at http://code.google.com/p/js-test-driver/ TestSwam – This framework, created by John Resig, uses PHP to automate the browser. Like jsTestDriver, the framework creates a test server. You can open multiple browsers that are automated by the test server. Learn more about TestSwarm by visiting the following address: https://github.com/jeresig/testswarm/wiki Yeti – This is the framework introduced by Yahoo for automating browser tests. Yeti uses server-side JavaScript and depends on Node.js. Learn more about Yeti at http://www.yuiblog.com/blog/2010/08/25/introducing-yeti-the-yui-easy-testing-interface/ All of these frameworks are great for integration tests – however, they are not the best frameworks to use for unit tests. In one way or another, all of these frameworks depend on executing tests within the context of a “living and breathing” browser. If you create an ASP.NET Unit Test then Visual Studio will launch a web server before executing the unit test. Why is launching a web server so bad? It is not the worst thing in the world. However, it does introduce dependencies that prevent your code from being tested in isolation. One of the defining features of a unit test -- versus an integration test – is that a unit test tests code in isolation. Another problem with launching a web server when performing unit tests is that launching a web server can be slow. If you cannot execute your unit tests quickly, you are less likely to execute your unit tests each and every time you make a code change. You are much more likely to fall into the pit of failure. Launching a browser when performing a JavaScript unit test has all of the same disadvantages as launching a web server when performing an ASP.NET unit test. Instead of testing a unit of JavaScript code in isolation, you are testing JavaScript code within the context of a particular browser. Using the frameworks listed above for integration tests makes perfect sense. However, I want to consider a different approach for creating unit tests for JavaScript code. Using Server-Side JavaScript for JavaScript Unit Tests A completely different approach to executing JavaScript unit tests is to perform the tests outside of any browser. If you really want to test JavaScript then you should test JavaScript and leave the browser out of the testing process. There are several ways that you can execute JavaScript on the server outside the context of any browser: Rhino – Rhino is an implementation of JavaScript written in Java. The Rhino project is maintained by the Mozilla project. Learn more about Rhino at http://www.mozilla.org/rhino/ V8 – V8 is the open-source Google JavaScript engine written in C++. This is the JavaScript engine used by the Chrome web browser. You can download V8 and embed it in your project by visiting http://code.google.com/p/v8/ JScript – JScript is the JavaScript Script Engine used by Internet Explorer (up to but not including Internet Explorer 9), Windows Script Host, and Active Server Pages. Internet Explorer is still the most popular web browser. Therefore, I decided to focus on using the JScript Script Engine to execute JavaScript unit tests. Using the Microsoft Script Control There are two basic ways that you can pass JavaScript to the JScript Script Engine and execute the code: use the Microsoft Windows Script Interfaces or use the Microsoft Script Control. The difficult and proper way to execute JavaScript using the JScript Script Engine is to use the Microsoft Windows Script Interfaces. You can learn more about the Script Interfaces by visiting http://msdn.microsoft.com/en-us/library/t9d4xf28(VS.85).aspx The main disadvantage of using the Script Interfaces is that they are difficult to use from .NET. There is a great series of articles on using the Script Interfaces from C# located at http://www.drdobbs.com/184406028. I picked the easier alternative and used the Microsoft Script Control. The Microsoft Script Control is an ActiveX control that provides a higher level abstraction over the Window Script Interfaces. You can download the Microsoft Script Control from here: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=d7e31492-2595-49e6-8c02-1426fec693ac After you download the Microsoft Script Control, you need to add a reference to it to your project. Select the Visual Studio menu option Project, Add Reference to open the Add Reference dialog. Select the COM tab and add the Microsoft Script Control 1.0. Using the Script Control is easy. You call the Script Control AddCode() method to add JavaScript code to the Script Engine. Next, you call the Script Control Run() method to run a particular JavaScript function. The reference documentation for the Microsoft Script Control is located at the MSDN website: http://msdn.microsoft.com/en-us/library/aa227633%28v=vs.60%29.aspx Creating the JavaScript Code to Test To keep things simple, let’s imagine that you want to test the following JavaScript function named addNumbers() which simply adds two numbers together: MvcApplication1\Scripts\Math.js function addNumbers(a, b) { return 5; } Notice that the addNumbers() method always returns the value 5. Right-now, it will not pass a good unit test. Create this file and save it in your project with the name Math.js in your MVC project’s Scripts folder (Save the file in your actual MVC application and not your MVC test application). Creating the JavaScript Test Helper Class To make it easier to use the Microsoft Script Control in unit tests, we can create a helper class. This class contains two methods: LoadFile() – Loads a JavaScript file. Use this method to load the JavaScript file being tested or the JavaScript file containing the unit tests. ExecuteTest() – Executes the JavaScript code. Use this method to execute a JavaScript unit test. Here’s the code for the JavaScriptTestHelper class: JavaScriptTestHelper.cs using System; using System.IO; using Microsoft.VisualStudio.TestTools.UnitTesting; using MSScriptControl; namespace MvcApplication1.Tests { public class JavaScriptTestHelper : IDisposable { private ScriptControl _sc; private TestContext _context; /// <summary> /// You need to use this helper with Unit Tests and not /// Basic Unit Tests because you need a Test Context /// </summary> /// <param name="testContext">Unit Test Test Context</param> public JavaScriptTestHelper(TestContext testContext) { if (testContext == null) { throw new ArgumentNullException("TestContext"); } _context = testContext; _sc = new ScriptControl(); _sc.Language = "JScript"; _sc.AllowUI = false; } /// <summary> /// Load the contents of a JavaScript file into the /// Script Engine. /// </summary> /// <param name="path">Path to JavaScript file</param> public void LoadFile(string path) { var fileContents = File.ReadAllText(path); _sc.AddCode(fileContents); } /// <summary> /// Pass the path of the test that you want to execute. /// </summary> /// <param name="testMethodName">JavaScript function name</param> public void ExecuteTest(string testMethodName) { dynamic result = null; try { result = _sc.Run(testMethodName, new object[] { }); } catch { var error = ((IScriptControl)_sc).Error; if (error != null) { var description = error.Description; var line = error.Line; var column = error.Column; var text = error.Text; var source = error.Source; if (_context != null) { var details = String.Format("{0} \r\nLine: {1} Column: {2}", source, line, column); _context.WriteLine(details); } } throw new AssertFailedException(error.Description); } } public void Dispose() { _sc = null; } } } Notice that the JavaScriptTestHelper class requires a Test Context to be instantiated. For this reason, you can use the JavaScriptTestHelper only with a Visual Studio Unit Test and not a Basic Unit Test (These are two different types of Visual Studio project items). Add the JavaScriptTestHelper file to your MVC test application (for example, MvcApplication1.Tests). Creating the JavaScript Unit Test Next, we need to create the JavaScript unit test function that we will use to test the addNumbers() function. Create a folder in your MVC test project named JavaScriptTests and add the following JavaScript file to this folder: MvcApplication1.Tests\JavaScriptTests\MathTest.js /// <reference path="JavaScriptUnitTestFramework.js"/> function testAddNumbers() { // Act var result = addNumbers(1, 3); // Assert assert.areEqual(4, result, "addNumbers did not return right value!"); } The testAddNumbers() function takes advantage of another JavaScript library named JavaScriptUnitTestFramework.js. This library contains all of the code necessary to make assertions. Add the following JavaScriptnitTestFramework.js to the same folder as the MathTest.js file: MvcApplication1.Tests\JavaScriptTests\JavaScriptUnitTestFramework.js var assert = { areEqual: function (expected, actual, message) { if (expected !== actual) { throw new Error("Expected value " + expected + " is not equal to " + actual + ". " + message); } } }; There is only one type of assertion supported by this file: the areEqual() assertion. Most likely, you would want to add additional types of assertions to this file to make it easier to write your JavaScript unit tests. Deploying the JavaScript Test Files This step is non-intuitive. When you use Visual Studio to run unit tests, Visual Studio creates a new folder and executes a copy of the files in your project. After you run your unit tests, your Visual Studio Solution will contain a new folder named TestResults that includes a subfolder for each test run. You need to configure Visual Studio to deploy your JavaScript files to the test run folder or Visual Studio won’t be able to find your JavaScript files when you execute your unit tests. You will get an error that looks something like this when you attempt to execute your unit tests: You can configure Visual Studio to deploy your JavaScript files by adding a Test Settings file to your Visual Studio Solution. It is important to understand that you need to add this file to your Visual Studio Solution and not a particular Visual Studio project. Right-click your Solution in the Solution Explorer window and select the menu option Add, New Item. Select the Test Settings item and click the Add button. After you create a Test Settings file for your solution, you can indicate that you want a particular folder to be deployed whenever you perform a test run. Select the menu option Test, Edit Test Settings to edit your test configuration file. Select the Deployment tab and select your MVC test project’s JavaScriptTest folder to deploy. Click the Apply button and the Close button to save the changes and close the dialog. Creating the Visual Studio Unit Test The very last step is to create the Visual Studio unit test (the MS Test unit test). Add a new unit test to your MVC test project by selecting the menu option Add New Item and selecting the Unit Test project item (Do not select the Basic Unit Test project item): The difference between a Basic Unit Test and a Unit Test is that a Unit Test includes a Test Context. We need this Test Context to use the JavaScriptTestHelper class that we created earlier. Enter the following test method for the new unit test: [TestMethod] public void TestAddNumbers() { var jsHelper = new JavaScriptTestHelper(this.TestContext); // Load JavaScript files jsHelper.LoadFile("JavaScriptUnitTestFramework.js"); jsHelper.LoadFile(@"..\..\..\MvcApplication1\Scripts\Math.js"); jsHelper.LoadFile("MathTest.js"); // Execute JavaScript Test jsHelper.ExecuteTest("testAddNumbers"); } This code uses the JavaScriptTestHelper to load three files: JavaScripUnitTestFramework.js – Contains the assert functions. Math.js – Contains the addNumbers() function from your MVC application which is being tested. MathTest.js – Contains the JavaScript unit test function. Next, the test method calls the JavaScriptTestHelper ExecuteTest() method to execute the testAddNumbers() JavaScript function. Running the Visual Studio JavaScript Unit Test After you complete all of the steps described above, you can execute the JavaScript unit test just like any other unit test. You can use the keyboard combination CTRL-R, CTRL-A to run all of the tests in the current Visual Studio Solution. Alternatively, you can use the buttons in the Visual Studio toolbar to run the tests: (Unfortunately, the Run All Impacted Tests button won’t work correctly because Visual Studio won’t detect that your JavaScript code has changed. Therefore, you should use either the Run Tests in Current Context or Run All Tests in Solution options instead.) The results of running the JavaScript tests appear side-by-side with the results of running the server tests in the Test Results window. For example, if you Run All Tests in Solution then you will get the following results: Notice that the TestAddNumbers() JavaScript test has failed. That is good because our addNumbers() function is hard-coded to always return the value 5. If you double-click the failing JavaScript test, you can view additional details such as the JavaScript error message and the line number of the JavaScript code that failed: Summary The goal of this blog entry was to explain an approach to creating JavaScript unit tests that can be easily integrated with Visual Studio and Visual Studio ALM. I described how you can use the Microsoft Script Control to execute JavaScript on the server. By taking advantage of the Microsoft Script Control, we were able to execute our JavaScript unit tests side-by-side with all of our other unit tests and view the results in the standard Visual Studio Test Results window. You can download the code discussed in this blog entry from here: http://StephenWalther.com/downloads/Blog/JavaScriptUnitTesting/JavaScriptUnitTests.zip Before running this code, you need to first install the Microsoft Script Control which you can download from here: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=d7e31492-2595-49e6-8c02-1426fec693ac

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Random movement of wandering monsters in x & y axis in LibGDX

- by Vishal Kumar

I am making a simple top down RPG game in LibGDX. What I want is ... the enemies should wander here and there in x and y directions in certain interval so that it looks natural that they are guarding something. I spend several hours doing this but could not achieve what I want. After a long time of coding, I came with this code. But what I observed is when enemies come to an end of x or start of x or start of y or end of y of the map. It starts flickering for random intervals. Sometimes they remain nice, sometimes, they start flickering for long time. public class Enemy extends Sprite { public float MAX_VELOCITY = 0.05f; public static final int MOVING_LEFT = 0; public static final int MOVING_RIGHT = 1; public static final int MOVING_UP = 2; public static final int MOVING_DOWN = 3; public static final int HORIZONTAL_GUARD = 0; public static final int VERTICAL_GUARD = 1; public static final int RANDOM_GUARD = 2; private float startTime = System.nanoTime(); private static float SECONDS_TIME = 0; private boolean randomDecider; public int enemyType; public static final float width = 30 * World.WORLD_UNIT; public static final float height = 32 * World.WORLD_UNIT; public int state; public float stateTime; public boolean visible; public boolean dead; public Enemy(float x, float y, int enemyType) { super(x, y); state = MOVING_LEFT; this.enemyType = enemyType; stateTime = 0; visible = true; dead = false; boolean random = Math.random()>=0.5f ? true :false; if(enemyType == HORIZONTAL_GUARD){ if(random) velocity.x = -MAX_VELOCITY; else velocity.x = MAX_VELOCITY; } if(enemyType == VERTICAL_GUARD){ if(random) velocity.y = -MAX_VELOCITY; else velocity.y = MAX_VELOCITY; } if(enemyType == RANDOM_GUARD){ //if(random) //velocity.x = -MAX_VELOCITY; //else //velocity.y = MAX_VELOCITY; } } public void update(Enemy e, float deltaTime) { super.update(deltaTime); e.stateTime+= deltaTime; e.position.add(velocity); // This is for updating the Animation for Enemy Movement Direction. VERY IMPORTANT FOR REAL EFFECTS updateDirections(); //Here the various movement methods are called depending upon the type of the Enemy if(e.enemyType == HORIZONTAL_GUARD) guardHorizontally(); if(e.enemyType == VERTICAL_GUARD) guardVertically(); if(e.enemyType == RANDOM_GUARD) guardRandomly(); //quadrantMovement(e, deltaTime); } private void guardHorizontally(){ if(position.x <= 0){ velocity.x= MAX_VELOCITY; velocity.y= 0; } else if(position.x>= World.mapWidth-width){ velocity.x= -MAX_VELOCITY; velocity.y= 0; } } private void guardVertically(){ if(position.y<= 0){ velocity.y= MAX_VELOCITY; velocity.x= 0; } else if(position.y>= World.mapHeight- height){ velocity.y= -MAX_VELOCITY; velocity.x= 0; } } private void guardRandomly(){ if (System.nanoTime() - startTime >= 1000000000) { SECONDS_TIME++; if(SECONDS_TIME % 5==0) randomDecider = Math.random()>=0.5f ? true :false; if(SECONDS_TIME>=30) SECONDS_TIME =0; startTime = System.nanoTime(); } if(SECONDS_TIME <=30){ if(randomDecider && position.x >= 0) velocity.x= -MAX_VELOCITY; else{ if(position.x < World.mapWidth-width) velocity.x= MAX_VELOCITY; else velocity.x= -MAX_VELOCITY; } velocity.y =0; } else{ if(randomDecider && position.y >0) velocity.y= -MAX_VELOCITY; else velocity.y= MAX_VELOCITY; velocity.x =0; } /* //This is essential so as to keep the enemies inside the boundary of the Map if(position.x <= 0){ velocity.x= MAX_VELOCITY; //velocity.y= 0; } else if(position.x>= World.mapWidth-width){ velocity.x= -MAX_VELOCITY; //velocity.y= 0; } else if(position.y<= 0){ velocity.y= MAX_VELOCITY; //velocity.x= 0; } else if(position.y>= World.mapHeight- height){ velocity.y= -MAX_VELOCITY; //velocity.x= 0; } */ } private void updateDirections() { if(velocity.x > 0) state = MOVING_RIGHT; else if(velocity.x<0) state = MOVING_LEFT; else if(velocity.y>0) state = MOVING_UP; else if(velocity.y<0) state = MOVING_DOWN; } public Rectangle getBounds() { return new Rectangle(position.x, position.y, width, height); } private void quadrantMovement(Enemy e, float deltaTime) { int temp = e.getEnemyQuadrant(e.position.x, e.position.y); boolean random = Math.random()>=0.5f ? true :false; switch(temp){ case 1: velocity.x = MAX_VELOCITY; break; case 2: velocity.x = MAX_VELOCITY; break; case 3: velocity.x = -MAX_VELOCITY; break; case 4: velocity.x = -MAX_VELOCITY; break; default: if(random) velocity.x = MAX_VELOCITY; else velocity.y =-MAX_VELOCITY; } } public float getDistanceFromPoint(float p1,float p2){ Vector2 v1 = new Vector2(p1,p2); return position.dst(v1); } private int getEnemyQuadrant(float x, float y){ Rectangle enemyQuad = new Rectangle(x, y, 30, 32); if(ScreenQuadrants.getQuad1().contains(enemyQuad)) return 1; if(ScreenQuadrants.getQuad2().contains(enemyQuad)) return 2; if(ScreenQuadrants.getQuad3().contains(enemyQuad)) return 3; if(ScreenQuadrants.getQuad4().contains(enemyQuad)) return 4; return 0; } } Is there a better way of doing this. I am new to game development. I shall be very grateful to any help or reference.

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Parallelism in .NET – Part 6, Declarative Data Parallelism

- by Reed

When working with a problem that can be decomposed by data, we have a collection, and some operation being performed upon the collection. I’ve demonstrated how this can be parallelized using the Task Parallel Library and imperative programming using imperative data parallelism via the Parallel class. While this provides a huge step forward in terms of power and capabilities, in many cases, special care must still be given for relative common scenarios. C# 3.0 and Visual Basic 9.0 introduced a new, declarative programming model to .NET via the LINQ Project. When working with collections, we can now write software that describes what we want to occur without having to explicitly state how the program should accomplish the task. By taking advantage of LINQ, many operations become much shorter, more elegant, and easier to understand and maintain. Version 4.0 of the .NET framework extends this concept into the parallel computation space by introducing Parallel LINQ. Before we delve into PLINQ, let’s begin with a short discussion of LINQ. LINQ, the extensions to the .NET Framework which implement language integrated query, set, and transform operations, is implemented in many flavors. For our purposes, we are interested in LINQ to Objects. When dealing with parallelizing a routine, we typically are dealing with in-memory data storage. More data-access oriented LINQ variants, such as LINQ to SQL and LINQ to Entities in the Entity Framework fall outside of our concern, since the parallelism there is the concern of the data base engine processing the query itself. LINQ (LINQ to Objects in particular) works by implementing a series of extension methods, most of which work on IEnumerable<T>. The language enhancements use these extension methods to create a very concise, readable alternative to using traditional foreach statement. For example, let’s revisit our minimum aggregation routine we wrote in Part 4: double min = double.MaxValue; foreach(var item in collection) { double value = item.PerformComputation(); min = System.Math.Min(min, value); } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } Here, we’re doing a very simple computation, but writing this in an imperative style. This can be loosely translated to English as: Create a very large number, and save it in min Loop through each item in the collection. For every item: Perform some computation, and save the result If the computation is less than min, set min to the computation Although this is fairly easy to follow, it’s quite a few lines of code, and it requires us to read through the code, step by step, line by line, in order to understand the intention of the developer. We can rework this same statement, using LINQ: double min = collection.Min(item => item.PerformComputation()); Here, we’re after the same information. However, this is written using a declarative programming style. When we see this code, we’d naturally translate this to English as: Save the Min value of collection, determined via calling item.PerformComputation() That’s it – instead of multiple logical steps, we have one single, declarative request. This makes the developer’s intentions very clear, and very easy to follow. The system is free to implement this using whatever method required. Parallel LINQ (PLINQ) extends LINQ to Objects to support parallel operations. This is a perfect fit in many cases when you have a problem that can be decomposed by data. To show this, let’s again refer to our minimum aggregation routine from Part 4, but this time, let’s review our final, parallelized version: // Safe, and fast! double min = double.MaxValue; // Make a "lock" object object syncObject = new object(); Parallel.ForEach( collection, // First, we provide a local state initialization delegate. () => double.MaxValue, // Next, we supply the body, which takes the original item, loop state, // and local state, and returns a new local state (item, loopState, localState) => { double value = item.PerformComputation(); return System.Math.Min(localState, value); }, // Finally, we provide an Action<TLocal>, to "merge" results together localState => { // This requires locking, but it's only once per used thread lock(syncObj) min = System.Math.Min(min, localState); } ); Here, we’re doing the same computation as above, but fully parallelized. Describing this in English becomes quite a feat: Create a very large number, and save it in min Create a temporary object we can use for locking Call Parallel.ForEach, specifying three delegates For the first delegate: Initialize a local variable to hold the local state to a very large number For the second delegate: For each item in the collection, perform some computation, save the result If the result is less than our local state, save the result in local state For the final delegate: Take a lock on our temporary object to protect our min variable Save the min of our min and local state variables Although this solves our problem, and does it in a very efficient way, we’ve created a set of code that is quite a bit more difficult to understand and maintain. PLINQ provides us with a very nice alternative. In order to use PLINQ, we need to learn one new extension method that works on IEnumerable<T> – ParallelEnumerable.AsParallel(). That’s all we need to learn in order to use PLINQ: one single method. We can write our minimum aggregation in PLINQ very simply: double min = collection.AsParallel().Min(item => item.PerformComputation()); By simply adding “.AsParallel()” to our LINQ to Objects query, we converted this to using PLINQ and running this computation in parallel! This can be loosely translated into English easily, as well: Process the collection in parallel Get the Minimum value, determined by calling PerformComputation on each item Here, our intention is very clear and easy to understand. We just want to perform the same operation we did in serial, but run it “as parallel”. PLINQ completely extends LINQ to Objects: the entire functionality of LINQ to Objects is available. By simply adding a call to AsParallel(), we can specify that a collection should be processed in parallel. This is simple, safe, and incredibly useful.

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The right way of using index.html

- by Jeyekomon

I have quite a lot of issues I'd like to hear your opinion on, so I hope I'll manage to explain it well enough. I should also note that I'm beginner equipped only with the knowledge of HTML and CSS so although I'm almost sure that there is a simple solution using powerful PHP, it won't help me. Let's say that I have my personal blog on the address example.com/blog.html and there are links to several sub-blogs example.com/blog/math.html, example.com/blog/coding.html etc. So my root folder contains blog.html and blog folder, the blog folder itself contains files math.html and coding.html. First of all, I learned (from Google Webmasters Tools) that for SEO and aesthetical purposes it's good to unify example.com.com and example.com/index.html by adding _rel="canonical"_ attribute into the source of the index.html. Using a couple of other tricks (like linking to ../ and ./) I got rid of the ugly index.html appearing in my web addresses. And now I wonder if this trick can be used not only for the root folder but for any folder? I mean, I would move my blog.html into the blog folder, rename it into the index.html and add rel="canonical" to unify example.com/blog/index.html with example.com/blog/. This trick would change the address of my blog from example.com/blog.html into example.com/blog/. Not finished! I'm also experiencing problems with the google robot indexing my folders. So when I type site:example.com/ into the google search, the link to my folder example.com/blog/ with raw files, icons etc. appears among the other results. I guess there are also other ways how to fix it, but IMHO the change mentioned above would do the trick too - the index.html in the blog folder would preserve the user from viewing the actual raw content of that folder, there would appear only the right link example.com/blog/ in the google search and (I hope that) _rel="canonical"_ would make the second, unwanted link example.com/blog/index.html not to appear in the search results. So my questions are: Is it a good practice to have the index.html file in every subfolder or is it intended to be only in the root folder? Are there any disadvantages or problems that may occur when using the second, "index in every folder" method? Which one of the two ways of structuring the website described above would you prefer?

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Deploying a PHP Library project with Maven

- by Marco

Hi, I've created a PHP Library project using Maven, and I'm now ready for its deployment. Following the instructions at http://www.php-maven.org/deploy.html, something went wrong. The configuration is set to: <descriptorRef>php-lib</descriptorRef> During the execution of mvn deploy I get a list of errors for unfound dependencies in the repository: [INFO] [jar:jar {execution: default-jar}] [INFO] Building jar: /home/marco/projects/php/my-app/target/my-app-1.0-SNAPSHOT.jar [INFO] [plugin:addPluginArtifactMetadata {execution: default-addPluginArtifactMetadata}] Downloading: http://repo1.php-maven.org/release/org/phpmaven/maven-php-plugin/2.2-beta-2/maven-php-plugin-2.2-beta-2.pom [INFO] Unable to find resource 'org.phpmaven:maven-php-plugin:pom:2.2-beta-2' in repository release-repo1.php-maven.org (http://repo1.php-maven.org/release) Downloading: http://repo1.maven.org/maven2/org/phpmaven/maven-php-plugin/2.2-beta-2/maven-php-plugin-2.2-beta-2.pom [INFO] Unable to find resource 'org.phpmaven:maven-php-plugin:pom:2.2-beta-2' in repository central (http://repo1.maven.org/maven2) Downloading: http://repo1.php-maven.org/release/org/phpmaven/maven-php-plugin/2.2-beta-2/maven-php-plugin-2.2-beta-2.pom [INFO] Unable to find resource 'org.phpmaven:maven-php-plugin:pom:2.2-beta-2' in repository release-repo1.php-maven.org (http://repo1.php-maven.org/release) Downloading: http://repo1.maven.org/maven2/org/phpmaven/maven-php-plugin/2.2-beta-2/maven-php-plugin-2.2-beta-2.pom [INFO] Unable to find resource 'org.phpmaven:maven-php-plugin:pom:2.2-beta-2' in repository central (http://repo1.maven.org/maven2) Downloading: http://repo1.php-maven.org/release/org/apache/maven/wagon/wagon-http-shared/1.0-beta-6/wagon-http-shared-1.0-beta-6.pom [INFO] Unable to find resource 'org.apache.maven.wagon:wagon-http-shared:pom:1.0-beta-6' in repository release-repo1.php-maven.org (http://repo1.php-maven.org/release) Downloading: http://repo1.php-maven.org/release/org/apache/maven/wagon/wagon-http-shared/1.0-beta-6/wagon-http-shared-1.0-beta-6.pom [INFO] Unable to find resource 'org.apache.maven.wagon:wagon-http-shared:pom:1.0-beta-6' in repository release-repo1.php-maven.org (http://repo1.php-maven.org/release) Downloading: http://repo1.maven.org/maven2/org/apache/maven/wagon/wagon-http-shared/1.0-beta-6/wagon-http-shared-1.0-beta-6.pom Downloading: http://repo1.php-maven.org/release/nekohtml/xercesMinimal/1.9.6.2/xercesMinimal-1.9.6.2.pom [INFO] Unable to find resource 'nekohtml:xercesMinimal:pom:1.9.6.2' in repository release-repo1.php-maven.org (http://repo1.php-maven.org/release) Downloading: http://repo1.php-maven.org/release/nekohtml/xercesMinimal/1.9.6.2/xercesMinimal-1.9.6.2.pom [INFO] Unable to find resource 'nekohtml:xercesMinimal:pom:1.9.6.2' in repository release-repo1.php-maven.org (http://repo1.php-maven.org/release) Downloading: http://repo1.maven.org/maven2/nekohtml/xercesMinimal/1.9.6.2/xercesMinimal-1.9.6.2.pom And this is my settings.xml file: <settings> <profiles> <profile> <id>profile-php-maven</id> <pluginRepositories> <pluginRepository> <id>release-repo1.php-maven.org</id> <name>PHP-Maven 2 Release Repository</name> <url>http://repo1.php-maven.org/release</url> <releases> <enabled>true</enabled> </releases> </pluginRepository> <pluginRepository> <id>snapshot-repo1.php-maven.org</id> <name>PHP-Maven 2 Snapshot Repository</name> <url>http://repo1.php-maven.org/snapshot</url> <releases> <enabled>false</enabled> </releases> <snapshots> <enabled>true</enabled> </snapshots> </pluginRepository> </pluginRepositories> <repositories> <repository> <id>release-repo1.php-maven.org</id> <name>PHP-Maven 2 Release Repository</name> <url>http://repo1.php-maven.org/release</url> <releases> <enabled>true</enabled> </releases> </repository> <repository> <id>snapshot-repo1.php-maven.org</id> <name>PHP-Maven 2 Snapshot Repository</name> <url>http://repo1.php-maven.org/snapshot</url> <releases> <enabled>false</enabled> </releases> <snapshots> <enabled>true</enabled> </snapshots> </repository> </repositories> </profile> </profiles> <activeProfiles> <activeProfile>profile-php-maven</activeProfile> </activeProfiles> </settings> For every step I've followed the documentation (which is poor, though). Any tips? Thanks

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Learn WinRT or Unity 3d?

- by user1582878

I am not sure where to ask advices about career development, so I am sorry if I am wrong. My question is what is better for me to learn, Win 8 and metro style applications or try to focus on some 3d engine, like Unity 3d? On the one hand I`ve got enought experience in c# and programming for business applications (WinForms and WPF), on the other hand I was always been fasinated by the creation of computer games and have strong math background. Which is better in terms of my career and new job opportunities?

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How can I bend an object in OpenGL?

- by mindnoise

Is there a way one could bend an object, like a cylinder or a plane using OpenGL? I'm an OpenGL beginner (I'm using OpenGL ES 2.0, if that matters, although I suspect, math matters most in this case, so it's somehow version independent), I understand the basics: translate, rotate, matrix transformations, etc. I was wondering if there is a technique which allows you to actually change the geometry of your objects (in this case by bending them)? Any links, tutorials or other references are welcomed!

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UV texture mapping with perspective correct interpolation

- by Twodordan

I am working on a software rasterizer for educational purposes and I am having issues with the texturing. The problem is, only one face of the cube gets correctly textured. The rest are stretched edges: You can see the running program online here. I have used cartesian coordinates, and all I do is interpolate the uv values along the scanlines. The general formula I use for interpolating the uv coordinates is pretty much the one I use for the z-buffering interpolation and looks like this (in this case for horizontal scanlines): u_Slope = (right.u - left.u) / (triangleRight_x - triangleLeft_x); v_Slope = (right.v - left.v) / (triangleRight_x - triangleLeft_x); //[...] new_u = left.u + ((currentX_onScanLine - triangleLeft_x) * u_Slope); new_v = left.v + ((currentX_onScanLine - triangleLeft_x) * v_Slope); Then, when I add each point to the pixel buffer, I restore z and uv: z = (1/z); uv.u = Math.round(uv.u * z *100);//*100 because my texture is 100x100px uv.v = Math.round(uv.v * z *100); Then I turn the u v indexes into one index in order to fetch the correct pixel from the image data (which is a 1 dimensional px array): var index = texture.width * uv.u + uv.v; //and the rest is unimportant imagedata[index].RGBA bla bla The interpolation formula is correct considering the consistency of the texture (including the straight stripes). However, I seem to get quite a lot of 0 values for either u or v. Which is probably why I only get one face right. Furthermore, why is the texture flipped horizontally? (the "1" is flipped) I must get some sleep now, but before I get into further dissecting of every single value to see what goes wrong, Can someone more experienced guess why might this be happening, just by looking at the cube? "I have no idea what I'm doing" (it's my first time implementing a rasterizer). Did I miss an important stage? Thanks for any insight. PS: My UV values are as follows: { u:0, v:0 }, { u:0, v:0.5 }, { u:0.5, v:0.5 }, { u:0.5, v:0 }, { u:0, v:0 }, { u:0, v:0.5 }, { u:0.5, v:0.5 }, { u:0.5, v:0 }

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