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• Apache+LDAP auth on Ubuntu says "Can't contact LDAP server" while ldapsearch is perfect

  - by tw79

  Hi Gurus, I'm migrating from an existing apache+LDAP+mysql+php server to a new hardware platform. Old server is running Debian Lenny, which I have no config documentation available (was done by previous sysadmin); New server is running Ubuntu 10.04.2 LTS 32bit. After installing Apache and configured LDAP client on the new server, ldapsearch to the LDAP master (another dedicated server) returns results just fine. However, when using apache with https, logs complain that "Can't contact LDAP server". I'm authenticating using ldaps and can confirm that 636 port is open on the LDAP master. I can't understand why apache would fail while regular ldapsearch is working! Below is part of the virtualhost config: <Directory /> Options FollowSymLinks AllowOverride None #AuthLDAPEnabled on AuthType Basic AuthBasicProvider ldap AuthName "Private" AuthLDAPURL ldaps://master.ldap.organisation.com:636/ou=people,dc=organisation,dc=com?uid AuthzLDAPAuthoritative off require valid-user AddType application/x-httpd-php .php .phtml <IfModule mod_php4.c> php_flag magic_quotes_gpc Off php_flag track_vars On php_value include_path . </IfModule> </Directory> Any help/suggestion is very much appreciated!

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• Offloading (Some) EBS 12 Reporting to Active Data Guard Instances

  - by Steven Chan

  For most Oracle Database users, Oracle Active Data Guard allows users to:Create a physical standby database for business continuity and disaster recoveryOffload reporting from the production database to the read-only physical standby databaseE-Business Suite customers have been able to use Active Data Guard to create physical standby databases for their EBS environments since the feature was introduced with the 11g Database.  EBS sysadmins can use the generic Active Data Guard documentation to take advantage of the Active Data Guard standby database capabilities.  I am pleased to announce that it is now possible to offload a subset of some ReportWriter-based reports -- but not all -- from a production EBS environment to an Active Data Guard physical standby database.  But before I go into the details of this newly-certified configuration, it's necessary to understand some details about what happens whenever someone attempts to access the E-Business Suite.

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• What should be tested in Javascript?

  - by Nathan Hoad

  At work, we've just started on a heavily Javascript based application (actually using Coffeescript, but still), of which I've been implementing an automated test system using JsTestDriver and fabric. We've never written something with this much Javascript, so up until now we've never done any Javascript testing. I'm unsure what exactly we should be testing in our unit tests. We've written JQuery plugins for various things, so it's quite obvious that they should be verified for correctness as much as possible with JsTestDriver, but everyone else in my team seems to think that we should be testing the page level Javascript as well. I don't think we should be testing page level Javascript as unit tests, but instead using a system like Selenium to verify everything works as expected. My main reasoning for this is that at the moment, page level Javascript tests are guaranteed to fail through JsTestDriver, because they're trying to access elements on the DOM that can't possibly exist. So, what should be unit tested in Javascript?

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• WebLogic Server Performance and Tuning: Part I - Tuning JVM

  - by Gokhan Gungor

  Each WebLogic Server instance runs in its own dedicated Java Virtual Machine (JVM) which is their runtime environment. Every Admin Server in any domain executes within a JVM. The same also applies for Managed Servers. WebLogic Server can be used for a wide variety of applications and services which uses the same runtime environment and resources. Oracle WebLogic ships with 2 different JVM, HotSpot and JRocket but you can choose which JVM you want to use. JVM is designed to optimize itself however it also provides some startup options to make small changes. There are default values for its memory and garbage collection. In real world, you will not want to stick with the default values provided by the JVM rather want to customize these values based on your applications which can produce large gains in performance by making small changes with the JVM parameters. We can tell the garbage collector how to delete garbage and we can also tell JVM how much space to allocate for each generation (of java Objects) or for heap. Remember during the garbage collection no other process is executed within the JVM or runtime, which is called STOP THE WORLD which can affect the overall throughput. Each JVM has its own memory segment called Heap Memory which is the storage for java Objects. These objects can be grouped based on their age like young generation (recently created objects) or old generation (surviving objects that have lived to some extent), etc. A java object is considered garbage when it can no longer be reached from anywhere in the running program. Each generation has its own memory segment within the heap. When this segment gets full, garbage collector deletes all the objects that are marked as garbage to create space. When the old generation space gets full, the JVM performs a major collection to remove the unused objects and reclaim their space. A major garbage collect takes a significant amount of time and can affect system performance. When we create a managed server either on the same machine or on remote machine it gets its initial startup parameters from $DOMAIN_HOME/bin/setDomainEnv.sh/cmd file. By default two parameters are set:     Xms: The initial heapsize     Xmx: The max heapsize Try to set equal initial and max heapsize. The startup time can be a little longer but for long running applications it will provide a better performance. When we set -Xms512m -Xmx1024m, the physical heap size will be 512m. This means that there are pages of memory (in the state of the 512m) that the JVM does not explicitly control. It will be controlled by OS which could be reserve for the other tasks. In this case, it is an advantage if the JVM claims the entire memory at once and try not to spend time to extend when more memory is needed. Also you can use -XX:MaxPermSize (Maximum size of the permanent generation) option for Sun JVM. You should adjust the size accordingly if your application dynamically load and unload a lot of classes in order to optimize the performance. You can set the JVM options/heap size from the following places:     Through the Admin console, in the Server start tab     In the startManagedWeblogic script for the managed servers     $DOMAIN_HOME/bin/startManagedWebLogic.sh/cmd     JAVA_OPTIONS="-Xms1024m -Xmx1024m" ${JAVA_OPTIONS}     In the setDomainEnv script for the managed servers and admin server (domain wide)     USER_MEM_ARGS="-Xms1024m -Xmx1024m" When there is free memory available in the heap but it is too fragmented and not contiguously located to store the object or when there is actually insufficient memory we can get java.lang.OutOfMemoryError. We should create Thread Dump and analyze if that is possible in case of such error. The second option we can use to produce higher throughput is to garbage collection. We can roughly divide GC algorithms into 2 categories: parallel and concurrent. Parallel GC stops the execution of all the application and performs the full GC, this generally provides better throughput but also high latency using all the CPU resources during GC. Concurrent GC on the other hand, produces low latency but also low throughput since it performs GC while application executes. The JRockit JVM provides some useful command-line parameters that to control of its GC scheme like -XgcPrio command-line parameter which takes the following options; XgcPrio:pausetime (To minimize latency, parallel GC) XgcPrio:throughput (To minimize throughput, concurrent GC ) XgcPrio:deterministic (To guarantee maximum pause time, for real time systems) Sun JVM has similar parameters (like  -XX:UseParallelGC or -XX:+UseConcMarkSweepGC) to control its GC scheme. We can add -verbosegc -XX:+PrintGCDetails to monitor indications of a problem with garbage collection. Try configuring JVM’s of all managed servers to execute in -server mode to ensure that it is optimized for a server-side production environment.

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• NFS issue: clients can mount shares as NFSv3 but not as NFSv4 -- or how to debug NFS?

  - by tdn

  Problem description I have a file server running Debian. On it I have a few NFS shares. When I mount the shares from a client using NFSv3 (mount.nfs 10.0.0.51:/exports/video /mnt -o vers=3,soft,intr,timeo=10), it works. However, I would like to use NFSv4 because of improved security and performance. When I try to mount an NFSv4 share on malbec the mount command just hangs and finally times out after 2 minutes. How do I make the clients mount the NFSv4 shares as NFSv4? How do I troubleshoot NFS? There is no information in the syslog on neither client nor server. What are any errors in my configuration? Facts: Server is corvina(10.0.0.51) Client is malbec(10.0.0.1) Malbec runs Ubuntu 12.04 Server runs Debian 7 wheezy Both are connected through 1 GbE LAN. Firewalls are off. rpcinfo (root@malbec) (13-07-02 21:00) (P:0 L:1) [0] ~ # rpcinfo -p program vers proto port service 100000 4 tcp 111 portmapper 100000 3 tcp 111 portmapper 100000 2 tcp 111 portmapper 100000 4 udp 111 portmapper 100000 3 udp 111 portmapper 100000 2 udp 111 portmapper 100024 1 udp 4000 status 100024 1 tcp 4000 status (root@malbec) (13-07-02 21:00) (P:0 L:1) [0] ~ # rpcinfo -p corvina program vers proto port service 100000 4 tcp 111 portmapper 100000 3 tcp 111 portmapper 100000 2 tcp 111 portmapper 100000 4 udp 111 portmapper 100000 3 udp 111 portmapper 100000 2 udp 111 portmapper 100024 1 udp 4000 status 100024 1 tcp 4000 status 100003 3 udp 2049 nfs 100227 3 udp 2049 100021 1 udp 4003 nlockmgr 100021 3 udp 4003 nlockmgr 100021 4 udp 4003 nlockmgr 100021 1 tcp 4003 nlockmgr 100021 3 tcp 4003 nlockmgr 100021 4 tcp 4003 nlockmgr 100005 1 udp 4002 mountd 100005 1 tcp 4002 mountd 100005 2 udp 4002 mountd 100005 2 tcp 4002 mountd 100005 3 udp 4002 mountd 100005 3 tcp 4002 mountd tcpdump The following is output from tcpdump on malbec while running this command: # rpcinfo -p corvina ~ # tcpdump -i eth0 host 10.0.0.51 21:14:51.762083 IP malbec.vineyard.sikkerhed.org.948 > corvina.vineyard.sikkerhed.org.sunrpc: Flags [S], seq 3069120722, win 14600, options [mss 1460,sackOK,TS val 146111 ecr 0,nop,wscale 7], length 0 21:14:51.762431 IP corvina.vineyard.sikkerhed.org.sunrpc > malbec.vineyard.sikkerhed.org.948: Flags [S.], seq 770684199, ack 3069120723, win 14480, options [mss 1460,sackOK,TS val 398850 ecr 146111,nop,wscale 7], length 0 21:14:51.762458 IP malbec.vineyard.sikkerhed.org.948 > corvina.vineyard.sikkerhed.org.sunrpc: Flags [.], ack 1, win 115, options [nop,nop,TS val 146111 ecr 398850], length 0 21:14:51.762556 IP malbec.vineyard.sikkerhed.org.948 > corvina.vineyard.sikkerhed.org.sunrpc: Flags [P.], seq 1:45, ack 1, win 115, options [nop,nop,TS val 146111 ecr 398850], length 44 21:14:51.762710 IP corvina.vineyard.sikkerhed.org.sunrpc > malbec.vineyard.sikkerhed.org.948: Flags [.], ack 45, win 114, options [nop,nop,TS val 398850 ecr 146111], length 0 21:14:51.763282 IP corvina.vineyard.sikkerhed.org.sunrpc > malbec.vineyard.sikkerhed.org.948: Flags [P.], seq 1:473, ack 45, win 114, options [nop,nop,TS val 398850 ecr 146111], length 472 21:14:51.763302 IP malbec.vineyard.sikkerhed.org.948 > corvina.vineyard.sikkerhed.org.sunrpc: Flags [.], ack 473, win 123, options [nop,nop,TS val 146111 ecr 398850], length 0 21:14:51.764059 IP malbec.vineyard.sikkerhed.org.948 > corvina.vineyard.sikkerhed.org.sunrpc: Flags [F.], seq 45, ack 473, win 123, options [nop,nop,TS val 146111 ecr 398850], length 0 21:14:51.764454 IP corvina.vineyard.sikkerhed.org.sunrpc > malbec.vineyard.sikkerhed.org.948: Flags [F.], seq 473, ack 46, win 114, options [nop,nop,TS val 398850 ecr 146111], length 0 21:14:51.764478 IP malbec.vineyard.sikkerhed.org.948 > corvina.vineyard.sikkerhed.org.sunrpc: Flags [.], ack 474, win 123, options [nop,nop,TS val 146111 ecr 398850], length 0 The following is output from tcpdump on malbec while runing this command: ~ # time mount.nfs4 10.0.0.51:/ /mnt -o soft,intr,timeo=10 21:14:58.397327 IP malbec.vineyard.sikkerhed.org.872 > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 1298959870, win 14600, options [mss 1460,sackOK,TS val 147769 ecr 0,nop,wscale 7], length 0 21:14:58.397655 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.872: Flags [R.], seq 0, ack 1298959871, win 0, length 0 21:14:59.470270 IP malbec.vineyard.sikkerhed.org.854 > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 4111013041, win 14600, options [mss 1460,sackOK,TS val 148038 ecr 0,nop,wscale 7], length 0 21:14:59.470569 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.854: Flags [R.], seq 0, ack 4111013042, win 0, length 0 21:15:01.506179 IP malbec.vineyard.sikkerhed.org.988 > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 1642454567, win 14600, options [mss 1460,sackOK,TS val 148547 ecr 0,nop,wscale 7], length 0 21:15:01.506514 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.988: Flags [R.], seq 0, ack 1642454568, win 0, length 0 21:15:05.542216 IP malbec.vineyard.sikkerhed.org.882 > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 3844460520, win 14600, options [mss 1460,sackOK,TS val 149556 ecr 0,nop,wscale 7], length 0 21:15:05.542484 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.882: Flags [R.], seq 0, ack 3844460521, win 0, length 0 21:15:13.602228 IP malbec.vineyard.sikkerhed.org.969 > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 1317773588, win 14600, options [mss 1460,sackOK,TS val 151571 ecr 0,nop,wscale 7], length 0 21:15:13.602527 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.969: Flags [R.], seq 0, ack 1317773589, win 0, length 0 21:15:18.615027 ARP, Request who-has malbec.vineyard.sikkerhed.org tell corvina.vineyard.sikkerhed.org, length 46 21:15:18.615048 ARP, Reply malbec.vineyard.sikkerhed.org is-at cc:52:af:46:af:23 (oui Unknown), length 28 21:15:23.622223 IP malbec.vineyard.sikkerhed.org.1003 > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 2896563167, win 14600, options [mss 1460,sackOK,TS val 154076 ecr 0,nop,wscale 7], length 0 21:15:23.622557 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.1003: Flags [R.], seq 0, ack 2896563168, win 0, length 0 21:15:28.629913 ARP, Request who-has corvina.vineyard.sikkerhed.org tell malbec.vineyard.sikkerhed.org, length 28 21:15:28.630223 ARP, Reply corvina.vineyard.sikkerhed.org is-at 00:9c:02:ab:db:54 (oui Unknown), length 46 21:15:33.662200 IP malbec.vineyard.sikkerhed.org.727 > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 1334644196, win 14600, options [mss 1460,sackOK,TS val 156586 ecr 0,nop,wscale 7], length 0 21:15:33.663657 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.727: Flags [R.], seq 0, ack 1334644197, win 0, length 0 21:15:43.698207 IP malbec.vineyard.sikkerhed.org.rsync > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 688828331, win 14600, options [mss 1460,sackOK,TS val 159095 ecr 0,nop,wscale 7], length 0 21:15:43.698541 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.rsync: Flags [R.], seq 0, ack 688828332, win 0, length 0 21:15:48.707710 ARP, Request who-has malbec.vineyard.sikkerhed.org tell corvina.vineyard.sikkerhed.org, length 46 21:15:48.707726 ARP, Reply malbec.vineyard.sikkerhed.org is-at cc:52:af:46:af:23 (oui Unknown), length 28 21:15:53.738188 IP malbec.vineyard.sikkerhed.org.946 > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 2021272456, win 14600, options [mss 1460,sackOK,TS val 161605 ecr 0,nop,wscale 7], length 0 21:15:53.738519 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.946: Flags [R.], seq 0, ack 2021272457, win 0, length 0 21:16:03.806216 IP malbec.vineyard.sikkerhed.org.902 > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 3889059201, win 14600, options [mss 1460,sackOK,TS val 164122 ecr 0,nop,wscale 7], length 0 21:16:03.806546 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.902: Flags [R.], seq 0, ack 3889059202, win 0, length 0 21:16:08.821900 ARP, Request who-has corvina.vineyard.sikkerhed.org tell malbec.vineyard.sikkerhed.org, length 28 21:16:08.822172 ARP, Reply corvina.vineyard.sikkerhed.org is-at 00:9c:02:ab:db:54 (oui Unknown), length 46 21:16:13.874209 IP malbec.vineyard.sikkerhed.org.712 > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 1480927452, win 14600, options [mss 1460,sackOK,TS val 166639 ecr 0,nop,wscale 7], length 0 21:16:13.874553 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.712: Flags [R.], seq 0, ack 1961062188, win 0, length 0 21:16:18.880588 ARP, Request who-has malbec.vineyard.sikkerhed.org tell corvina.vineyard.sikkerhed.org, length 46 21:16:18.880605 ARP, Reply malbec.vineyard.sikkerhed.org is-at cc:52:af:46:af:23 (oui Unknown), length 28 21:16:23.910209 IP malbec.vineyard.sikkerhed.org.758 > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 1375860626, win 14600, options [mss 1460,sackOK,TS val 169148 ecr 0,nop,wscale 7], length 0 21:16:23.910532 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.758: Flags [R.], seq 0, ack 1375860627, win 0, length 0 21:16:33.982258 IP malbec.vineyard.sikkerhed.org.694 > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 1769203987, win 14600, options [mss 1460,sackOK,TS val 171666 ecr 0,nop,wscale 7], length 0 21:16:33.982579 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.694: Flags [R.], seq 0, ack 1769203988, win 0, length 0 21:16:44.026241 IP malbec.vineyard.sikkerhed.org.841 > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 530553783, win 14600, options [mss 1460,sackOK,TS val 174177 ecr 0,nop,wscale 7], length 0 21:16:44.026505 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.841: Flags [R.], seq 0, ack 530553784, win 0, length 0 21:16:46.213388 IP malbec.vineyard.sikkerhed.org.43460 > corvina.vineyard.sikkerhed.org.ssh: Flags [P.], seq 64:128, ack 33, win 325, options [nop,nop,TS val 174723 ecr 397437], length 64 21:16:46.213859 IP corvina.vineyard.sikkerhed.org.ssh > malbec.vineyard.sikkerhed.org.43460: Flags [P.], seq 33:65, ack 128, win 199, options [nop,nop,TS val 427466 ecr 174723], length 32 21:16:46.213883 IP malbec.vineyard.sikkerhed.org.43460 > corvina.vineyard.sikkerhed.org.ssh: Flags [.], ack 65, win 325, options [nop,nop,TS val 174723 ecr 427466], length 0 21:16:54.094242 IP malbec.vineyard.sikkerhed.org.kerberos-master > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 2673083337, win 14600, options [mss 1460,sackOK,TS val 176694 ecr 0,nop,wscale 7], length 0 21:16:54.094568 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.kerberos-master: Flags [R.], seq 0, ack 2673083338, win 0, length 0 21:17:04.134227 IP malbec.vineyard.sikkerhed.org.1019 > corvina.vineyard.sikkerhed.org.nfs: Flags [S], seq 2176607713, win 14600, options [mss 1460,sackOK,TS val 179204 ecr 0,nop,wscale 7], length 0 21:17:04.134566 IP corvina.vineyard.sikkerhed.org.nfs > malbec.vineyard.sikkerhed.org.1019: Flags [R.], seq 0, ack 2176607714, win 0, length 0 21:18:46.314021 IP malbec.vineyard.sikkerhed.org.43460 > corvina.vineyard.sikkerhed.org.ssh: Flags [P.], seq 128:192, ack 65, win 325, options [nop,nop,TS val 204749 ecr 427466], length 64 21:18:46.314462 IP corvina.vineyard.sikkerhed.org.ssh > malbec.vineyard.sikkerhed.org.43460: Flags [P.], seq 65:97, ack 192, win 199, options [nop,nop,TS val 457494 ecr 204749], length 32 21:18:46.314482 IP malbec.vineyard.sikkerhed.org.43460 > corvina.vineyard.sikkerhed.org.ssh: Flags [.], ack 97, win 325, options [nop,nop,TS val 204749 ecr 457494], length 0 21:18:51.317908 ARP, Request who-has corvina.vineyard.sikkerhed.org tell malbec.vineyard.sikkerhed.org, length 28 21:18:51.318177 ARP, Reply corvina.vineyard.sikkerhed.org is-at 00:9c:02:ab:db:54 (oui Unknown), length 46 mount command outputs mount.nfs4: Connection timed out mount.nfs4 10.0.0.51:/ /mnt -o soft,intr,timeo=10 0,00s user 0,00s system 0% cpu 2:05,80 total Returncode is 32 Server configuration I have enabled idmapd by adding NEED_IDMAPD=yes in /etc/default/nfs-common. Bind mounts in /etc/fstab: # nfs-audio /data/audio /exports/audio none bind 0 0 # nfs-clear /data/clear /exports/clear none bind 0 0 # nfs-video /data/video /exports/video none bind 0 0 /etc/exports: /exports 10.0.0.0/255.255.255.0(rw,no_root_squash,no_subtree_check,fsid=0,crossmnt) /exports/video 10.0.0.0/255.255.255.0(rw,no_root_squash,no_subtree_check,crossmnt) Output from # ls -al /exports total 20 drwxr-xr-x 5 root root 4096 Jul 2 14:14 ./ drwxr-xr-x 28 root root 4096 Jul 2 13:46 ../ drwxr-xr-x 7 tdn audio 4096 Jun 7 11:30 audio/ drwxr-xr-x 11 root root 4096 Jun 29 12:07 clear/ drwxrwx--- 12 tdn video 4096 Jun 7 09:46 video/

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• Itautec Accelerates Profitable High Tech Customer Service

  - by charles.knapp

  Itautec is a Brazilian-based global high technology products and services firm with strong performance in the global market of banking and commercial automation, with more than 2,300 global clients. It recently deployed Siebel CRM for sales, customer support, and field service. In the first year of use, Siebel CRM enabled a 30% growth in services revenue. Siebel CRM also reduced support costs. "Oracle's Siebel CRM has minimized costs and made our customer service more agile," said Adriano Rodrigues da Silva, IT Manager. "Before deployment, 95% of our customer service contacts were made by phone. Siebel CRM made it possible to expand' choices, so that now 55% of our customers contact our helpdesk through the newer communications channels." Read more here about Itautec's success, and learn more here about how Siebel CRM can help your firm to grow customer service revenues, improve service levels, and reduce costs.

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• New Reference Configuration: Accelerate Deployment of Virtual Infrastructure

  - by monica.kumar

  Today, Oracle announced the availability of Oracle VM blade cluster reference configuration based on Sun servers, storage and Oracle VM software. Assembling and integrating software and hardware systems from different vendors can be a huge barrier to deploying virtualized infrastructures as it is often a complicated, time-consuming, risky and expensive process. Using this tested configuration can help reduce the time to configure and deploy a virtual infrastructure by up to 98% as compared to putting together multi-vendor configurations. Once ready, the infrastructure can be used to easily deploy enterprise applications in a matter of minutes to hours as opposed to days/weeks, by using Oracle VM Templates. Find out more: Press Release Business whitepaper Technical whitepaper

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• dasBlog

  Some people like blogging on a site that is completely managed by someone else (e.g. http://wordpress.com/) and others, like me, prefer hosting their own blog at their own domain. In the latter case you need to decide what blog engine to install on your web space to power your blog. There are many free blog engines to choose from (e.g. the one from http://wordpress.org/). If, like me, you want to use a blog engine that is based on the .NET platform you have many choices including BlogEngine.NET,...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Adopting DBVCS

  - by Wes McClure

  Identify early adopters Pick a small project with a small(ish) team.  This can be a legacy application or a green-field application. Strive to find a team of early adopters that will be eager to try something new. Get the team on board! Research Research the tool(s) that you want to use.  Some tools provide all of the features you would need while some only provide a slice of the pie.  DBVCS requires the ability to manage a set of change scripts that update a database from one version to the next.  Ideally a tool can track database versions and automatically apply updates.  The change script generation process can be manual, but having diff tools available to automatically generate it can really reduce the overhead to adoption.  Finally, an automated tool to generate a script file per database object is an added bonus as your version control system can quickly identify what was changed in a commit (add/del/modify), just like with code changes. Don’t settle on just one tool, identify several.  Then work with the team to evaluate the tools.  Have the team do some tests of the following scenarios with each tool: Baseline an existing database: can the migration tool work with legacy databases?  Caution: most migration platforms do not support baselines or have poor support, especially the fad of fluent APIs. Add/drop tables Add/drop procedures/functions/views Alter tables (rename columns, add columns, remove columns) Massage data – migrations sometimes involve changing data types that cannot be implicitly casted and require you to decide how the data is explicitly cast to the new type.  This is a requirement for a migrations platform.  Think about a case where you might want to combine fields, or move a field from one table to another, you wouldn’t want to lose the data. Run the tool via the command line.  If you cannot automate the tool in Continuous Integration what is the point? Create a copy of a database on demand. Backup/restore databases locally. Let the team give feedback and decide together, what tool they would like to try out. My recommendation at this point would be to include TSqlMigrations and RoundHouse as SQL based migration platforms.  In general I would recommend staying away from the fluent platforms as they often lack baseline capabilities and add overhead to learn a new API when SQL is already a very well known DSL.  Code migrations often get messy with procedures/views/functions as these have to be created with SQL and aren’t cross platform anyways.  IMO stick to SQL based migrations. Reconciling Production If your project is a legacy application, you will need to reconcile the current state of production with your development databases.  Find changes in production and bring them down to development, even if they are old and need to be removed.  Once complete, produce a baseline of either dev or prod as they are now in sync.  Commit this to your VCS of choice. Add whatever schema changes tracking mechanism your tool requires to your development database.  This often requires adding a table to track the schema version of that database.  Your tool should support doing this for you.  You can add this table to production when you do your next release. Script out any changes currently in dev.  Remove production artifacts that you brought down during reconciliation.  Add change scripts for any outstanding changes in dev since the last production release.  Commit these to your repository.   Say No to Shared Dev DBs Simply put, you wouldn’t dream of sharing a code checkout, why would you share a development database?  If you have a shared dev database, back it up, distribute the backups and take the shared version offline (including the dev db server once all projects are using DB VCS).  Doing DB VCS with a shared database is bound to cause problems as people won’t be able to easily script out their own changes from those that others are working on.   First prod release Copy prod to your beta/testing environment.  Add the schema changes table (or mechanism) and do a test run of your changes.  If successful you can schedule this to be run on production.   Evaluation After your first release, evaluate the pain points of the process.  Try to find tools or modifications to existing tools to help fix them.  Don’t leave stones unturned, iteratively evolve your tools and practices to make the process as seamless as possible.  This is why I suggest open source alternatives.  Nothing is set in stone, a good example was adding transactional support to TSqlMigrations.  We ran into situations where an update would break a database, so I added a feature to do transactional updates and rollback on errors!  Another good example is generating change scripts.  We have been manually making these for months now.  I found an open source project called Open DB Diff and integrated this with TSqlMigrations.  These were things we just accepted at the time when we began adopting our tool set.  Once we became comfortable with the base functionality, it was time to start automating more of the process.  Just like anything else with development, never be afraid to try to find tools to make your job easier!   Enjoy -Wes

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• ‘Assassin’s Creed: Pirates’ now Available to Play In-Browser for Free

  - by Akemi Iwaya

  Are you ready to sail the high seas in search of treasure and adventure? All you need is a browser and the determination to be the ‘King of the Caribbean’ in ‘Assassin’s Creed: Pirates’, the latest in-browser game release from Microsoft! If you are curious as to how this game fits into the broader Assassin’s Creed Universe, here is the answer. From the blog post: Gameplay is based on the iOS “Assassin’s Creed Pirates” game, allowing you to be captain Alonzo Batilla, who is racing his ship through the Caribbean, evading mines and other hurdles, while searching for treasure. Keep in mind that the game is a demo at the moment, but still a lot of fun for any Assassin’s Creed fan! Play the demo and learn more about the game via the links below. Good luck and have fun! Play Assassin’s Creed: Pirates [Demo Homepage] Arrrrrr! ‘Assassin’s Creed Pirates’ – for the Web – now available ['The Fire Hose Blog' - Microsoft] [via The Windows Club]

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• CodePlex Daily Summary for Sunday, March 07, 2010

  CodePlex Daily Summary for Sunday, March 07, 2010New ProjectsAlgorithminator: Universal .NET algorithm visualizer, which helps you to illustrate any algorithm, written in any .NET language. Still in development.ALToolkit: Contains a set of handy .NET components/classes. Currently it contains: * A Numeric Text Box (an Extended NumericUpDown) * A Splash Screen base fo...Automaton Home: Automaton is a home automation software built with a n-Tier, MVVM pattern utilzing WCF, EF, WPF, Silverlight and XBAP.Developer Controls: Developer Controls contains various controls to help build applications that can script/write code.Dynamic Reference Manager: Dynamic Reference Manager is a set (more like a small group) of classes and attributes written in C# that allows any .NET program to reference othe...indiologic: Utilities of an IndioNeural Cryptography in F#: This project is my magistracy resulting work. It is intended to be an example of using neural networks in cryptography. Hashing functions are chose...Particle Filter Visualization: Particle Filter Visualization Program for the Intel Science and Engineering FairPólya: Efficient, immutable, polymorphic collections. .Net lacks them, we provide them*. * By we, we mean I; and by efficient, I mean hopefully so.project euler solutions from mhinze: mhinze project euler solutionsSilverlight 4 and WCF multi layer: Silverlight 4 and WCF multi layersqwarea: Project for a browser-based, minimalistic, massively multiplayer strategy game. Part of the "Génie logiciel et Cloud Computing" course of the ENS (...SuperSocket: SuperSocket, a socket application framework can build FTP/SMTP/POP server easilyToast (for ASP.NET MVC): Dynamic, developer & designer friendly content injection, compression and optimization for ASP.NET MVCNew ReleasesALToolkit: ALToolkit 1.0: Binary release of the libraries containing: NumericTextBox SplashScreen Based on the VB.NET code, but that doesn't really matter.Blacklist of Providers: 1.0-Milestone 1: Blacklist of Providers.Milestone 1In this development release implemented - Main interface (Work Item #5453) - Database (Work Item #5523)C# Linear Hash Table: Linear Hash Table b2: Now includes a default constructor, and will throw an exception if capacity is not set to a power of 2 or loadToMaintain is below 1.Composure: CassiniDev-Trunk-40745-VS2010.rc1.NET4: A simple port of the CassiniDev portable web server project for Visual Studio 2010 RC1 built against .NET 4.0. The WCF tests currently fail unless...Developer Controls: DevControls: These are the version 1.0 releases of these controls. Download the individually or all together (in a .zip file). More releases coming soon!Dynamic Reference Manager: DRM Alpha1: This is the first release. I'm calling it Alpha because I intend implementing other functions, but I do not intend changing the way current functio...ESB Toolkit Extensions: Tellago SOA ESB Extenstions v0.3: Windows Installer file that installs Library on a BizTalk ESB 2.0 system. This Install automatically configures the esb.config to use the new compo...GKO Libraries: GKO Libraries 0.1 Alpha: 0.1 AlphaHome Access Plus+: v3.0.3.0: Version 3.0.3.0 Release Change Log: Added Announcement Box Removed script files that aren't needed Fixed & issue in directory path Stylesheet...Icarus Scene Engine: Icarus Scene Engine 1.10.306.840: Icarus Professional, Icarus Player, the supporting software for Icarus Scene Engine, with some included samples, and the start of a tutorial (with ...mavjuz WndLpt: wndlpt-0.2.5: New: Response to 5 LPT inputs "test i 1" New: Reaction to 12 LPT outputs "test q 8" New: Reaction to all LPT pins "test pin 15" New: Syntax: ...Neural Cryptography in F#: Neural Cryptography 0.0.1: The most simple version of this project. It has a neural network that works just like logical AND and a possibility to recreate neural network from...Password Provider: 1.0.3: This release fixes a bug which caused the program to crash when double clicking on a generic item.RoTwee: RoTwee 6.2.0.0: New feature is as next. 16649 Add hashtag for tweet of tune.Now you can tweet your playing tune with hashtag.Visual Studio DSite: Picture Viewer (Visual C++ 2008): This example source code allows you to view any picture you want in the click of a button. All you got to do is click the button and browser via th...WatchersNET CKEditor™ Provider for DotNetNuke: CKEditor Provider 1.8.00: Whats New File Browser: Folders & Files View reworked File Browser: Folders & Files View reworked File Browser: Folders are displayed as TreeVi...WSDLGenerator: WSDLGenerator 0.0.0.4: - replaced CommonLibrary.dll by CommandLineParser.dll - added better support for custom complex typesMost Popular ProjectsMetaSharpSilverlight ToolkitASP.NET Ajax LibraryAll-In-One Code FrameworkWindows 7 USB/DVD Download Toolニコ生アラートWindows Double ExplorerVirtual Router - Wifi Hot Spot for Windows 7 / 2008 R2Caliburn: An Application Framework for WPF and SilverlightArkSwitchMost Active ProjectsUmbraco CMSRawrSDS: Scientific DataSet library and toolsBlogEngine.NETjQuery Library for SharePoint Web Servicespatterns & practices – Enterprise LibraryIonics Isapi Rewrite FilterFarseer Physics EngineFasterflect - A Fast and Simple Reflection APIFluent Assertions

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• Secret Server 7.3 released – store your team’s passwords securely.

  - by thycotic

  The Thycotic team just recently released 7.3 of our enterprise password management system.  The main improvement was the UI – we used lots of jQuery to make a Dashboard-like interface that allows you to create tabs, drag widgets, add/remove widgets etc.  This was a great face lift for a tool that is already the cornerstone for password management in many IT departments. Check out a few videos that show off the new stuff.   Jonathan Cogley is the CEO of Thycotic Software, an agile software services and product development company based in Washington DC.  Secret Server is our flagship enterprise password manager.

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• Cocos2d+pybox2d vs Cocos2d-Iphone

  - by DraskyVanderhoff

  I'm now working with two guys for making our first pc indie game and we decide to use cocos2d+pybox2d ( yeah , 2d python game :) ). We decide this based on what i seen in cocos2d iphone games , but i don't get very clear if cocos2d-iphone is just a porting with just a little more features or is far more better than cocos2d for pc. If you can get me out of this dilemma it would be great. I just want to be sure that i'm on the right track ( and also i want to porting this game for android and iphone if it got success in pc , but first my lovely pc :P ) PD: For the maps we will use Tiled , so is totally compatible with cocos2d ( any of both cases i think... )

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• The Interaction between Three-Tier Client/Server Model and Three-Tier Application Architecture Model

  The three-tier client/server model is a network architectural approach currently used in modern networking. This approach divides a network in to three distinct components. Three-Tier Client/Server Model Components Client Component Server Component Database Component The Client Component of the network typically represents any device on the network. A basic example of this would be computer or another network/web enabled devices that are connected to a network. Network clients request resources on the network, and are usually equipped with a user interface for the presentation of the data returned from the Server Component. This process is done through the use of various software clients, and example of this can be seen through the use of a web browser client. The web browser request information from the Server Component located on the network and then renders the results for the user to process. The Server Components of the network return data based on specific client request back to the requesting client.  Server Components also inherit the attributes of a Client Component in that they are a device on the network and that they can also request information from other Server Components. However what differentiates a Client Component from a Server Component is that a Server Component response to requests from devices on the network. An example of a Server Component can be seen in a web server. A web server listens for new requests and then interprets the request, processes the web pages, and then returns the processed data back to the web browser client so that it may render the data for the user to interpret. The Database Component of the network returns unprocessed data from databases or other resources. This component also inherits attributes from the Server Component in that it is a device on a network, it can request information from other server components and database components, and it also listens for new requests so that it can return data when needed. The three-tier client/server model is very similar to the three-tier application architecture model, and in fact the layers can be mapped to one another. Three-Tier Application Architecture Model Presentation Layer/Logic Business Layer/Logic Data Layer/Logic The Presentation Layer including its underlying logic is very similar to the Client Component of the three-tiered model. The Presentation Layer focuses on interpreting the data returned by the Business Layer as well as presents the data back to the user.  Both the Presentation Layer and the Client Component focus primarily on the user and their experience. This allows for segments of the Business Layer to be distributable and interchangeable because the Presentation Layer is not directly integrated in with Business Layer. The Presentation Layer does not care where the data comes from as long as it is in the proper format. This allows for the Presentation Layer and Business Layer to be stored on one or more different servers so that it can provide a higher availability to clients requesting data. A good example of this is a web site that uses load balancing. When a web site decides to take on the task of load balancing they must obtain a network device that sits in front of a one or machines in order to distribute the request across multiple servers. When a user comes in through the load balanced device they are redirected to a specific server based on a few factors. Common Load Balancing Factors Current Server Availability Current Server Response Time Current Server Priority The Business Layer and corresponding logic are business rules applied to data prior to it being sent to the Presentation Layer. These rules are used to manipulate the data coming from the Data Access Layer, in addition to validating any data prior to being stored in the Data Access Layer. A good example of this would be when a user is trying to create multiple accounts under one email address. The Business Layer logic can prevent duplicate accounts by enforcing a unique email for every new account before the data is even stored in the Data Access Layer. The Server Component can be directly tied to this layer in that the server typically stores and process the Business Layer before it is returned to the end-user via the Presentation Layer. In addition the Server Component can also run automated process through the Business Layer on the data in the Data Access Layer so that additional business analysis can be derived from the data that has been already collected. The Data Layer and its logic are responsible for storing information so that it can be easily retrieved. Typical in most modern applications data is stored in a database management system however data can also be in the form of files stored on a file server. In addition a database can take on one of several forms. Common Database Formats XML File Pipe Delimited File Tab Delimited File Comma Delimited File (CSV) Plain Text File Microsoft Access Microsoft SQL Server MySql Oracle Sybase The Database component of the Networking model can be directly tied to the Data Layer because this is where the Data Layer obtains the data to return back the Business Layer. The Database Component basically allows for a place on the network to store data for future use. This enables applications to save data when they can and then quickly recall the saved data as needed so that the application does not have to worry about storing the data in memory. This prevents overhead that could be created when an application must retain all data in memory. As you can see the Three-Tier Client/Server Networking Model and the Three-Tiered Application Architecture Model rely very heavily on one another to function especially if different aspects of an application are distributed across an entire network. The use of various servers and database servers are wonderful when an application has a need to distribute work across the network. Network Components and Application Layers Interaction Database components will store all data needed for the Data Access Layer to manipulate and return to the Business Layer Server Component executes the Business Layer that manipulates data so that it can be returned to the Presentation Layer Client Component hosts the Presentation Layer that  interprets the data and present it to the user

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• postfix sasl "cannot connect to saslauthd server: No such file or directory"

  - by innotune

  I try to setup postfix with smtp authentication. I want to use /etc/shadow as my realm Unfortunately I get a "generic error" when i try to authenticate # nc localhost 25 220 mail.foo ESMTP Postfix AUTH PLAIN _base_64_encoded_user_name_and_password_ 535 5.7.8 Error: authentication failed: generic failure In the mail.warn logfile i get the following entry Oct 8 10:43:40 mail postfix/smtpd[1060]: warning: SASL authentication failure: cannot connect to saslauthd server: No such file or directory Oct 8 10:43:40 mail postfix/smtpd[1060]: warning: SASL authentication failure: Password verification failed Oct 8 10:43:40 mail postfix/smtpd[1060]: warning: _ip_: SASL PLAIN authentication failed: generic failure However the sasl setup seems to be fine $ testsaslauthd -u _user_ -p _pass_ 0: OK "Success." i added smtpd_sasl_auth_enable = yes to the main.cf This is my smtpd.conf $ cat /etc/postfix/sasl/smtpd.conf pwcheck_method: saslauthd mech_list: PLAIN LOGIN saslauthd_path: /var/run/saslauthd/mux autotransition:true I tried this conf with the last two commands and without. I'm running debian stable. How can postfix find and connect to the saslauthd server? Edit: I'm not sure whether postfix runs in a chroot The master.cf looks like this: http://pastebin.com/Fz38TcUP saslauth is located in the sbin $ which saslauthd /usr/sbin/saslauthd The EHLO has this response EHLO _server_name_ 250-_server_name_ 250-PIPELINING 250-SIZE 10240000 250-VRFY 250-ETRN 250-STARTTLS 250-AUTH LOGIN PLAIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN

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• game inventory/bag system javascript html5 game

  - by Tom Burman

  im building an RPG game using html5's canvas and javascript. Its tile based and im using an array to created my game map. I would like the player to have a bag/inventory so when they select or land on a tile that has an item on it, they can click on it and store it in their bag/inventory. I was thinking of using a 2d array to store the value of the item tile, a bit like my map is doing, so when the player lands on, lets say a rope tile which is tileID 4, the value 4 is pushed into the next array position available, then reloop through the array and reprint it to the screen. For an example of what im trying to achieve visually, would be like runescapes inventory, but dumbed down a bit. I appreciate any views and answers. Im not great at javascript coding so please be patient Thanks Tom

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• SQL SERVER – SSMS: Memory Usage By Memory Optimized Objects Report

  - by Pinal Dave

  At conferences and at speaking engagements at the local UG, there is one question that keeps on coming which I wish were never asked. The question around, “Why is SQL Server using up all the memory and not releasing even when idle?” Well, the answer can be long and with the release of SQL Server 2014, this got even more complicated. This release of SQL Server 2014 has the option of introducing In-Memory OLTP which is completely new concept and our dependency on memory has increased multifold. In reality, nothing much changes but we have memory optimized objects (Tables and Stored Procedures) additional which are residing completely in memory and improving performance. As a DBA, it is humanly impossible to get a hang of all the innovations and the new features introduced in the next version. So today’s blog is around the report added to SSMS which gives a high level view of this new feature addition. This reports is available only from SQL Server 2014 onwards because the feature was introduced in SQL Server 2014. Earlier versions of SQL Server Management Studio would not show the report in the list. If we try to launch the report on the database which is not having In-Memory File group defined, then we would see the message in report. To demonstrate, I have created new fresh database called MemoryOptimizedDB with no special file group. Here is the query used to identify whether a database has memory-optimized file group or not. SELECT TOP(1) 1 FROM sys.filegroups FG WHERE FG.[type] = 'FX' Once we add filegroup using below command, we would see different version of report. USE [master] GO ALTER DATABASE [MemoryOptimizedDB] ADD FILEGROUP [IMO_FG] CONTAINS MEMORY_OPTIMIZED_DATA GO The report is still empty because we have not defined any Memory Optimized table in the database.  Total allocated size is shown as 0 MB. Now, let’s add the folder location into the filegroup and also created few in-memory tables. We have used the nomenclature of IMO to denote “InMemory Optimized” objects. USE [master] GO ALTER DATABASE [MemoryOptimizedDB] ADD FILE ( NAME = N'MemoryOptimizedDB_IMO', FILENAME = N'E:\Program Files\Microsoft SQL Server\MSSQL12.SQL2014\MSSQL\DATA\MemoryOptimizedDB_IMO') TO FILEGROUP [IMO_FG] GO You may have to change the path based on your SQL Server configuration. Below is the script to create the table. USE MemoryOptimizedDB GO --Drop table if it already exists. IF OBJECT_ID('dbo.SQLAuthority','U') IS NOT NULL DROP TABLE dbo.SQLAuthority GO CREATE TABLE dbo.SQLAuthority ( ID INT IDENTITY NOT NULL, Name CHAR(500)  COLLATE Latin1_General_100_BIN2 NOT NULL DEFAULT 'Pinal', CONSTRAINT PK_SQLAuthority_ID PRIMARY KEY NONCLUSTERED (ID), INDEX hash_index_sample_memoryoptimizedtable_c2 HASH (Name) WITH (BUCKET_COUNT = 131072) ) WITH (MEMORY_OPTIMIZED = ON, DURABILITY = SCHEMA_AND_DATA) GO As soon as above script is executed, table and index both are created. If we run the report again, we would see something like below. Notice that table memory is zero but index is using memory. This is due to the fact that hash index needs memory to manage the buckets created. So even if table is empty, index would consume memory. More about the internals of how In-Memory indexes and tables work will be reserved for future posts. Now, use below script to populate the table with 10000 rows INSERT INTO SQLAuthority VALUES (DEFAULT) GO 10000 Here is the same report after inserting 1000 rows into our InMemory table.    There are total three sections in the whole report. Total Memory consumed by In-Memory Objects Pie chart showing memory distribution based on type of consumer – table, index and system. Details of memory usage by each table. The information about all three is taken from one single DMV, sys.dm_db_xtp_table_memory_stats This DMV contains memory usage statistics for both user and system In-Memory tables. If we query the DMV and look at data, we can easily notice that the system tables have negative object IDs.  So, to look at user table memory usage, below is the over-simplified version of query. USE MemoryOptimizedDB GO SELECT OBJECT_NAME(OBJECT_ID), * FROM sys.dm_db_xtp_table_memory_stats WHERE OBJECT_ID > 0 GO This report would help DBA to identify which in-memory object taking lot of memory which can be used as a pointer for designing solution. I am sure in future we will discuss at lengths the whole concept of In-Memory tables in detail over this blog. To read more about In-Memory OLTP, have a look at In-Memory OLTP Series at Balmukund’s Blog. Reference: Pinal Dave (http://blog.sqlauthority.com)Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Server Management Studio, SQL Tips and Tricks, T SQL Tagged: SQL Memory, SQL Reports

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• Working with Legacy code

  - by andrewstopford

  I'm going to start a series on working with legacy code based on some of things I have learnt over the years. First I define my terms for 'legacy', I define legacy as (as someone on twitter called it) not brownfield but blackfield. Brownfield can be code you did yesterday, last week or last month etc. Blackfield tends to be a great older (think years old) and worked on by a great deal many people. Sure brownfield can also be legacy code but often has far less smells and technical debt, due to it's age the problems are often far worse and far harder to treat.  I'm not sure how many posts I'll write for the series or how long it will run for but I'll add them as and when they occur to me. Finally if you are working with the kind of codebase I describe then Michael Feathers 'Working with Legacy code' is a great resource.

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• apache renew ssl not working [on hold]

  - by Varun S

  Downloaded a new ssl cert from go daddy and installed the cert on apache2 server put the cert in /etc/ssl/certs/ folder put the gd_bundle.crt in the /etc/ssl/ folder private key is in /etc/ssl/private/private.key I just replaced the original files with the new files, did not replace the private key. I restarted the server but the website is still showing old certificated date. What am I doing wrong and how do i resolve it ? my httpd.conf file is empty, the certificated config is in the sites-enabled/default-ssl file the server is apache2 running ubuntu 14.04 os SSLEngine on # A self-signed (snakeoil) certificate can be created by installing # the ssl-cert package. See # /usr/share/doc/apache2.2-common/README.Debian.gz for more info. # If both key and certificate are stored in the same file, only the # SSLCertificateFile directive is needed. SSLCertificateFile /etc/ssl/certs/2b1f6d308c2f9b.crt SSLCertificateKeyFile /etc/ssl/private/private.key # Server Certificate Chain: # Point SSLCertificateChainFile at a file containing the # concatenation of PEM encoded CA certificates which form the # certificate chain for the server certificate. Alternatively # the referenced file can be the same as SSLCertificateFile # when the CA certificates are directly appended to the server # certificate for convinience. SSLCertificateChainFile /etc/ssl/gd_bundle.crt -rwxr-xr-x 1 root root 1944 Aug 16 06:34 /etc/ssl/certs/2b1f6d308c2f9b.crt -rwxr-xr-x 1 root root 3197 Aug 16 06:10 /etc/ssl/gd_bundle.crt -rw-r--r-- 1 root root 1679 Oct 3 2013 /etc/ssl/private/private.key /etc/apache2/sites-available/default-ssl: # SSLCertificateFile directive is needed. /etc/apache2/sites-available/default-ssl: SSLCertificateFile /etc/ssl/certs/2b1f6d308c2f9b.crt /etc/apache2/sites-available/default-ssl: SSLCertificateKeyFile /etc/ssl/private/private.key /etc/apache2/sites-available/default-ssl: # Point SSLCertificateChainFile at a file containing the /etc/apache2/sites-available/default-ssl: # the referenced file can be the same as SSLCertificateFile /etc/apache2/sites-available/default-ssl: SSLCertificateChainFile /etc/ssl/gd_bundle.crt /etc/apache2/sites-enabled/default-ssl: # SSLCertificateFile directive is needed. /etc/apache2/sites-enabled/default-ssl: SSLCertificateFile /etc/ssl/certs/2b1f6d308c2f9b.crt /etc/apache2/sites-enabled/default-ssl: SSLCertificateKeyFile /etc/ssl/private/private.key /etc/apache2/sites-enabled/default-ssl: # Point SSLCertificateChainFile at a file containing the /etc/apache2/sites-enabled/default-ssl: # the referenced file can be the same as SSLCertificateFile /etc/apache2/sites-enabled/default-ssl: SSLCertificateChainFile /etc/ssl/gd_bundle.crt

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• Console keyboard input OOP

  - by Alexandre P. Levasseur

  I am trying to build a very simple console-based game with a focus on using OOP instead of procedural programming because I intend to build up on that code for more complex projects. I am wondering if there is a design pattern that nicely handles this use case: There is a Player class with a MakeMove() method interacting with the board game. The MakeMove() method has to somehow get the user input yet I do not want to code it into the Player class as this would reduce cohesion and augment coupling. I was thinking of maybe having some controller class handle the sequence of events and thus the calls to keyboard input. However, that controller class would need to be able to handle differently the subclasses of Player (e.g. the AI class does not require keyboard input). Thoughts ?

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• User roles in GWT applications

  - by csaffi

  Hi everybody, I'm wondering if you could suggest me any way to implement "user roles" in GWT applications. I would like to implement a GWT application where users log in and are assigned "roles". Based on their role, they would be able to see and use different application areas. Here are two possible solution I thought: 1) A possible solution could be to make an RPC call to the server during onModuleLoad. This RPC call would generate the necessary Widgets and/or place them on a panel and then return this panel to the client end. 2) Another possible solution could be to make an RPC call on login retrieving from server users roles and inspecting them to see what the user can do. What do you think about? Thank you very much in advance for your help!

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• Building the Elusive Windows Phone Panorama Control

  When the Windows Phone 7 Developer SDK was released a couple of weeks ago at MIX10 many people noticed the SDK doesnt include a template for a Panorama control.   Here at Clarity we decided to build our own Panorama control for use in some of our prototypes and I figured I would share what we came up with. There have been a couple of implementations of the Panorama control making their way through the interwebs, but I didnt think any of them really nailed the experience that is shown in the simulation videos.   One of the key design principals in the UX Guide for Windows Phone 7 is the use of motion.  The WP7 OS is fairly stripped of extraneous design elements and makes heavy use of typography and motion to give users the necessary visual cues.  Subtle animations and wide layouts help give the user a sense of fluidity and consistency across the phone experience.  When building the panorama control I was fairly meticulous in recreating the motion as shown in the videos.  The effect that is shown in the application hubs of the phone is known as a Parallax Scrolling effect.  This this pseudo-3D technique has been around in the computer graphics world for quite some time. In essence, the background images move slower than foreground images, creating an illusion of depth in 2D.  Here is an example of the traditional use: http://www.mauriciostudio.com/.  One of the animation gems I've learned while building interactive software is the follow animation.  The premise is straightforward: instead of translating content 1:1 with the interaction point, let the content catch up to the mouse or finger.  The difference is subtle, but the impact on the smoothness of the interaction is huge.  That said, it became the foundation of how I achieved the effect shown below.   Source Code Available HERE Before I briefly describe the approach I took in creating this control..and Ill add some **asterisks ** to the code below as my coding skills arent up to snuff with the rest of my colleagues.  This code is meant to be an interpretation of the WP7 panorama control and is not intended to be used in a production application.  1.  Layout the XAML The UI consists of three main components :  The background image, the Title, and the Content.  You can imagine each  these UI Elements existing on their own plane with a corresponding Translate Transform to create the Parallax effect.  2.  Storyboards + Procedural Animations = Sexy As I mentioned above, creating a fluid experience was at the top of my priorities while building this control.  To recreate the smooth scroll effect shown in the video we need to add some place holder storyboards that we can manipulate in code to simulate the inertia and snapping.  Using the easing functions built into Silverlight helps create a very pleasant interaction.    3.  Handle the Manipulation Events With Silverlight 3 we have some new touch event handlers.  The new Manipulation events makes handling the interactivity pretty straight forward.  There are two event handlers that need to be hooked up to enable the dragging and motion effects: the ManipulationDelta event :  (the most relevant code is highlighted in pink) Here we are doing some simple math with the Manipulation Deltas and setting the TO values of the animations appropriately. Modifying the storyboards dynamically in code helps to create a natural feel.something that cant easily be done with storyboards alone.   And secondly, the ManipulationCompleted event:  Here we take the Final Velocities from the Manipulation Completed Event and apply them to the Storyboards to create the snapping and scrolling effects.  Most of this code is determining what the next position of the viewport will be.  The interesting part (shown in pink) is determining the duration of the animation based on the calculated velocity of the flick gesture.  By using velocity as a variable in determining the duration of the animation we can produce a slow animation for a soft flick and a fast animation for a strong flick. Challenges to the Reader There are a couple of things I didnt have time to implement into this control.  And I would love to see other WPF/Silverlight approaches.  1.  A good mechanism for deciphering when the user is manipulating the content within the panorama control and the panorama itself.   In other words, being able to accurately determine what is a flick and what is click. 2.  Dynamically Sizing the panorama control based on the width of its content.  Right now each control panel is 400px, ideally the Panel items would be measured and then panorama control would update its size accordingly.  3.  Background and content wrapping.  The WP7 UX guidelines specify that the content and background should wrap at the end of the list.  In my code I restrict the drag at the ends of the list (like the iPhone).  It would be interesting to see how this would effect the scroll experience.     Well, Its been fun building this control and if you use it Id love to know what you think.  You can download the Source HERE or from the Expression Gallery  Erik Klimczak  | [email protected] | twitter.com/eklimczDid you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• NoSQL with RavenDB and ASP.NET MVC - Part 2

  - by shiju

  In my previous post, we have discussed on how to work with RavenDB document database in an ASP.NET MVC application. We have setup RavenDB for our ASP.NET MVC application and did basic CRUD operations against a simple domain entity. In this post, let’s discuss on domain entity with deep object graph and how to query against RavenDB documents using Indexes.Let's create two domain entities for our demo ASP.NET MVC appplication  public class Category {       public string Id { get; set; }     [Required(ErrorMessage = "Name Required")]     [StringLength(25, ErrorMessage = "Must be less than 25 characters")]     public string Name { get; set;}     public string Description { get; set; }     public List<Expense> Expenses { get; set; }       public Category()     {         Expenses = new List<Expense>();     } }    public class Expense {       public string Id { get; set; }     public Category Category { get; set; }     public string  Transaction { get; set; }     public DateTime Date { get; set; }     public double Amount { get; set; }   }  We have two domain entities - Category and Expense. A single category contains a list of expense transactions and every expense transaction should have a Category.Let's create  ASP.NET MVC view model  for Expense transaction public class ExpenseViewModel {     public string Id { get; set; }       public string CategoryId { get; set; }       [Required(ErrorMessage = "Transaction Required")]            public string Transaction { get; set; }       [Required(ErrorMessage = "Date Required")]            public DateTime Date { get; set; }       [Required(ErrorMessage = "Amount Required")]     public double Amount { get; set; }       public IEnumerable<SelectListItem> Category { get; set; } } Let's create a contract type for Expense Repository  public interface IExpenseRepository {     Expense Load(string id);     IEnumerable<Expense> GetExpenseTransactions(DateTime startDate,DateTime endDate);     void Save(Expense expense,string categoryId);     void Delete(string id);  } Let's create a concrete type for Expense Repository for handling CRUD operations. public class ExpenseRepository : IExpenseRepository {   private IDocumentSession session; public ExpenseRepository() {         session = MvcApplication.CurrentSession; } public Expense Load(string id) {     return session.Load<Expense>(id); } public IEnumerable<Expense> GetExpenseTransactions(DateTime startDate, DateTime endDate) {             //Querying using the Index name "ExpenseTransactions"     //filtering with dates     var expenses = session.LuceneQuery<Expense>("ExpenseTransactions")         .WaitForNonStaleResults()         .Where(exp => exp.Date >= startDate && exp.Date <= endDate)         .ToArray();     return expenses; } public void Save(Expense expense,string categoryId) {     var category = session.Load<Category>(categoryId);     if (string.IsNullOrEmpty(expense.Id))     {         //new expense transaction         expense.Category = category;         session.Store(expense);     }     else     {         //modifying an existing expense transaction         var expenseToEdit = Load(expense.Id);         //Copy values to  expenseToEdit         ModelCopier.CopyModel(expense, expenseToEdit);         //set category object         expenseToEdit.Category = category;       }     //save changes     session.SaveChanges(); } public void Delete(string id) {     var expense = Load(id);     session.Delete<Expense>(expense);     session.SaveChanges(); }   }  Insert/Update Expense Transaction The Save method is used for both insert a new expense record and modifying an existing expense transaction. For a new expense transaction, we store the expense object with associated category into document session object and load the existing expense object and assign values to it for editing a existing record.  public void Save(Expense expense,string categoryId) {     var category = session.Load<Category>(categoryId);     if (string.IsNullOrEmpty(expense.Id))     {         //new expense transaction         expense.Category = category;         session.Store(expense);     }     else     {         //modifying an existing expense transaction         var expenseToEdit = Load(expense.Id);         //Copy values to  expenseToEdit         ModelCopier.CopyModel(expense, expenseToEdit);         //set category object         expenseToEdit.Category = category;       }     //save changes     session.SaveChanges(); } Querying Expense transactions   public IEnumerable<Expense> GetExpenseTransactions(DateTime startDate, DateTime endDate) {             //Querying using the Index name "ExpenseTransactions"     //filtering with dates     var expenses = session.LuceneQuery<Expense>("ExpenseTransactions")         .WaitForNonStaleResults()         .Where(exp => exp.Date >= startDate && exp.Date <= endDate)         .ToArray();     return expenses; }  The GetExpenseTransactions method returns expense transactions using a LINQ query expression with a Date comparison filter. The Lucene Query is using a index named "ExpenseTransactions" for getting the result set. In RavenDB, Indexes are LINQ queries stored in the RavenDB server and would be  executed on the background and will perform query against the JSON documents. Indexes will be working with a lucene query expression or a set operation. Indexes are composed using a Map and Reduce function. Check out Ayende's blog post on Map/Reduce We can create index using RavenDB web admin tool as well as programmitically using its Client API. The below shows the screen shot of creating index using web admin tool. We can also create Indexes using Raven Cleint API as shown in the following code documentStore.DatabaseCommands.PutIndex("ExpenseTransactions",     new IndexDefinition<Expense,Expense>() {     Map = Expenses => from exp in Expenses                     select new { exp.Date } });  In the Map function, we used a Linq expression as shown in the following from exp in docs.Expensesselect new { exp.Date };We have not used a Reduce function for the above index. A Reduce function is useful while performing aggregate functions based on the results from the Map function. Indexes can be use with set operations of RavenDB.SET OperationsUnlike other document databases, RavenDB supports set based operations that lets you to perform updates, deletes and inserts to the bulk_docs endpoint of RavenDB. For doing this, you just pass a query to a Index as shown in the following commandDELETE http://localhost:8080/bulk_docs/ExpenseTransactions?query=Date:20100531The above command using the Index named "ExpenseTransactions" for querying the documents with Date filter and  will delete all the documents that match the query criteria. The above command is equivalent of the following queryDELETE FROM ExpensesWHERE Date='2010-05-31' Controller & ActionsWe have created Expense Repository class for performing CRUD operations for the Expense transactions. Let's create a controller class for handling expense transactions.   public class ExpenseController : Controller { private ICategoryRepository categoyRepository; private IExpenseRepository expenseRepository; public ExpenseController(ICategoryRepository categoyRepository, IExpenseRepository expenseRepository) {     this.categoyRepository = categoyRepository;     this.expenseRepository = expenseRepository; } //Get Expense transactions based on dates public ActionResult Index(DateTime? StartDate, DateTime? EndDate) {     //If date is not passed, take current month's first and last dte     DateTime dtNow;     dtNow = DateTime.Today;     if (!StartDate.HasValue)     {         StartDate = new DateTime(dtNow.Year, dtNow.Month, 1);         EndDate = StartDate.Value.AddMonths(1).AddDays(-1);     }     //take last date of startdate's month, if endate is not passed     if (StartDate.HasValue && !EndDate.HasValue)     {         EndDate = (new DateTime(StartDate.Value.Year, StartDate.Value.Month, 1)).AddMonths(1).AddDays(-1);     }       var expenses = expenseRepository.GetExpenseTransactions(StartDate.Value, EndDate.Value);     if (Request.IsAjaxRequest())     {           return PartialView("ExpenseList", expenses);     }     ViewData.Add("StartDate", StartDate.Value.ToShortDateString());     ViewData.Add("EndDate", EndDate.Value.ToShortDateString());             return View(expenses);            }   // GET: /Expense/Edit public ActionResult Edit(string id) {       var expenseModel = new ExpenseViewModel();     var expense = expenseRepository.Load(id);     ModelCopier.CopyModel(expense, expenseModel);     var categories = categoyRepository.GetCategories();     expenseModel.Category = categories.ToSelectListItems(expense.Category.Id.ToString());                    return View("Save", expenseModel);          }   // // GET: /Expense/Create   public ActionResult Create() {     var expenseModel = new ExpenseViewModel();               var categories = categoyRepository.GetCategories();     expenseModel.Category = categories.ToSelectListItems("-1");     expenseModel.Date = DateTime.Today;     return View("Save", expenseModel); }   // // POST: /Expense/Save // Insert/Update Expense Tansaction [HttpPost] public ActionResult Save(ExpenseViewModel expenseViewModel) {     try     {         if (!ModelState.IsValid)         {               var categories = categoyRepository.GetCategories();                 expenseViewModel.Category = categories.ToSelectListItems(expenseViewModel.CategoryId);                               return View("Save", expenseViewModel);         }           var expense=new Expense();         ModelCopier.CopyModel(expenseViewModel, expense);          expenseRepository.Save(expense, expenseViewModel.CategoryId);                       return RedirectToAction("Index");     }     catch     {         return View();     } } //Delete a Expense Transaction public ActionResult Delete(string id) {     expenseRepository.Delete(id);     return RedirectToAction("Index");     }     }     Download the Source - You can download the source code from http://ravenmvc.codeplex.com

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• What’s New for Oracle Commerce? Executive QA with John Andrews, VP Product Management, Oracle Commerce

  - by Katrina Gosek

  Oracle Commerce was for the fifth time positioned as a leader by Gartner in the Magic Quadrant for E-Commerce. This inspired me to sit down with Oracle Commerce VP of Product Management, John Andrews to get his perspective on what continues to make Oracle a leader in the industry and what’s new for Oracle Commerce in 2013. Q: Why do you believe Oracle Commerce continues to be a leader in the industry? John: Oracle has a great acquisition strategy – it brings best-of-breed technologies into the product fold and then continues to grow and innovate them. This is particularly true with products unified into the Oracle Commerce brand. Oracle acquired ATG in late 2010 – and then Endeca in late 2011. This means that under the hood of Oracle Commerce you have market-leading technologies for cross-channel commerce and customer experience, both designed and developed in direct response to the unique challenges online businesses face. And we continue to innovate on capabilities core to what our customers need to be successful – contextual and personalized experience delivery, merchant-inspired tools, and architecture for performance and scalability. Q: It’s not a slow moving industry. What are you doing to keep the pace of innovation at Oracle Commerce? John: Oracle owes our customers the most innovative commerce capabilities. By unifying the core components of ATG and Endeca we are delivering on this promise. Oracle Commerce is continuing to innovate and redefine how commerce is done and in a way that drive business results and keeps customers coming back for experiences tailored just for them. Our January and May 2013 releases not only marked the seventh significant releases for the solution since the acquisitions of ATG and Endeca, we also continue to demonstrate rapid and significant progress on the unification of commerce and customer experience capabilities of the two commerce technologies. Q: Can you tell us what was notable about these latest releases under the Oracle Commerce umbrella? John: Specifically, our latest product innovations give businesses selling online the ability to get to market faster with more personalized commerce experiences in the following ways: Mobile: the latest Commerce Reference Application in this release offers a wider range of examples for online businesses to leverage for iOS development and specifically new iPad reference capabilities. This release marks the first release of the iOS Universal application that serves both the iPhone and iPad devices from a single download or binary. Business users can now drive page content management and layout of search results and category pages, as well as create additional storefront elements such as categories, facets / dimensions, and breadcrumbs through Experience Manager tools. Cross-Channel Commerce: key commerce platform capabilities have been added to support cross-channel commerce, including an expanded inventory model to maintain inventory for stores, pickup in stores and Web-based returns. Online businesses with in-store operations can now offer advanced shipping options on the web and make returns and exchange logic easily available on the web. Multi-Site Capabilities: significant enhancements to the Commerce Platform multi-site architecture that allows business users to quickly launch and manage multiple sites on the same cluster and share data, carts, and other components. First introduced in 2010, with this latest release business users can now partition or share customer profiles, control users’ site-based access, and manage personalization assets using site groups. Internationalization: continued language support and enhancements for business user tools as well and search and navigation. Guided Search now supports 35 total languages with 11 new languages (including Danish, Arabic, Norwegian, Serbian Cyrillic) added in this release. Commerce Platform tools now include localized support for 17 locales with 4 new languages (Danish, Portuguese (European), Finnish, and Thai). No development or customization is required in order for business users to use the applications in any of these supported languages. Business Tool Experience: valuable new Commerce Merchandising features include a new workflow for making emergency changes quickly and increased visibility into promotions rules and qualifications in preview mode. Oracle Commerce business tools continue to become more and more feature rich to provide intuitive, easy- to-use (yet powerful) capabilities to allow business users to manage content and the shopping experience. Commerce & Experience Unification: demonstrable unification of commerce and customer experience capabilities include – productized cartridges that provide supported integration between the Commerce Platform and Experience Management tools, cross-channel returns, Oracle Service Cloud integration, and integrated iPad application. The mission guiding our product development is to deliver differentiated, personalized user experiences across any device in a contextual manner – and to give the business the best tools to tune and optimize those user experiences to meet their business objectives. We also need to do this in a way that makes it operationally efficient for the business, keeping the overall total cost of ownership low – yet also allows the business to expand, whether it be to new business models, geographies or brands. To learn more about the latest Oracle Commerce releases and mission, visit the links below: • Hear more from John about the Oracle Commerce mission • Hear from Oracle Commerce customers • Documentation on the new releases • Listen to the Oracle ATG Commerce 10.2 Webcast • Listen to the Oracle Endeca Commerce 3.1.2 Webcast

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• My MSDN magazine articles are live

  - by Daniel Moth

  Five years ago I wrote my first MSDN magazine article, and 21 months later I wrote my second MSDN Magazine article (during the VS 2010 Beta). By my calculation, that makes it two and a half years without having written anything for my favorite developer magazine! So, I came back with a vengeance, and in this month's April issue of the MSDN magazine you can find two articles from yours truly - enjoy: A Code-Based Introduction to C++ AMP Introduction to Tiling in C++ AMP For more on C++ AMP, please remember that I blog about it on our team blog, and we take questions in our MSDN forum. Comments about this post by Daniel Moth welcome at the original blog.

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