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• GSON on Google App Engine throws a Security Exception

  - by Legend

  I am trying to convert an object into JSON using the GSON library on Google App Engine. For some reason, it throws this exception and I don't understand how to solve this. Any suggestions? java.lang.SecurityException: java.lang.IllegalAccessException: Reflection is not allowed on private static final int java.util.BitSet.ADDRESS_BITS_PER_WORD at com.google.appengine.runtime.Request.process-8d5b435d6736643f(Request.java) at java.lang.reflect.AccessibleObject.setAccessible(AccessibleObject.java:29) at com.google.gson.ObjectNavigator.navigateClassFields(ObjectNavigator.java:141) at com.google.gson.ObjectNavigator.accept(ObjectNavigator.java:123) at com.google.gson.JsonSerializationVisitor.getJsonElementForChild(JsonSerializationVisitor.java:148) at com.google.gson.JsonSerializationVisitor.addAsArrayElement(JsonSerializationVisitor.java:139) at com.google.gson.JsonSerializationVisitor.visitArray(JsonSerializationVisitor.java:83) at com.google.gson.ObjectNavigator.accept(ObjectNavigator.java:109) at com.google.gson.JsonSerializationVisitor.getJsonElementForChild(JsonSerializationVisitor.java:148) at com.google.gson.JsonSerializationVisitor.addAsChildOfObject(JsonSerializationVisitor.java:126) at com.google.gson.JsonSerializationVisitor.visitArrayField(JsonSerializationVisitor.java:95) at com.google.gson.ObjectNavigator.navigateClassFields(ObjectNavigator.java:154) at com.google.gson.ObjectNavigator.accept(ObjectNavigator.java:123) at com.google.gson.JsonSerializationContextDefault.serialize(JsonSerializationContextDefault.java:56) at com.google.gson.Gson.toJsonTree(Gson.java:230) at com.google.gson.Gson.toJson(Gson.java:315) at com.google.gson.Gson.toJson(Gson.java:270) at com.google.gson.Gson.toJson(Gson.java:250) at companionmodel.Sample_Model_PopulateServlet.printOutput(Sample_Model_PopulateServlet.java:59) at companionmodel.Sample_Model_PopulateServlet.doGet(Sample_Model_PopulateServlet.java:28) at javax.servlet.http.HttpServlet.service(HttpServlet.java:693) at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:97) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:238) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923) at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:135) at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:250) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5838) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5836) at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingApplicationHandler.java:24) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:398) at com.google.net.rpc.impl.Server$2.run(Server.java:852) at com.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java:56) at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpanBuilder.java:576) at com.google.net.rpc.impl.Server.startRpc(Server.java:807) at com.google.net.rpc.impl.Server.processRequest(Server.java:369) at com.google.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.java:442) at com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:319) at com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:290) at com.google.net.async.Connection.handleReadEvent(Connection.java:474) at com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:831) at com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:207) at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:103) at com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java:251) at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run(JavaRuntime.java:413) at java.lang.Thread.run(Unknown Source) Code I am using: Gson gson = new Gson(); String json = gson.toJson(modelObject);

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• Strange problem with Google App Engine Java Mail

  - by Velu

  Hi, I'm using the MailService feature of Google App Engine in my application. It works fine in one application without any issues. But the same code doesn't work in another app. I'm not able to figure it out. Please help. Following is the piece of code that I use to send mail. public static void sendHTMLEmail(String from, String fromName, String to, String toName, String subject, String body) { _logger.info("entering ..."); Properties props = new Properties(); Session session = Session.getDefaultInstance(props, null); _logger.info("got mail session ..."); String htmlBody = body; try { Message msg = new MimeMessage(session); _logger.info("created mimemessage ..."); msg.setFrom(new InternetAddress(from, fromName)); _logger.info("from is set ..."); msg.addRecipient(Message.RecipientType.TO, new InternetAddress( to, toName)); _logger.info("recipient is set ..."); msg.setSubject(subject); _logger.info("subject is set ..."); Multipart mp = new MimeMultipart(); MimeBodyPart htmlPart = new MimeBodyPart(); htmlPart.setContent(htmlBody, "text/html"); mp.addBodyPart(htmlPart); _logger.info("body part added ..."); msg.setContent(mp); _logger.info("content is set ..."); Transport.send(msg); _logger.info("email sent successfully."); } catch (AddressException e) { e.printStackTrace(); } catch (MessagingException e) { e.printStackTrace(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); System.err.println(e.getMessage()); } } When I look at the log (on the server admin console), it prints the statement "content is set ..." and after that there is nothing in the log. The mail is not sent. At times I get the following error after the above statement is printed (and the mail is not sent). com.google.appengine.repackaged.com.google.common.base.internal.Finalizer getInheritableThreadLocalsField: Couldn't access Thread.inheritableThreadLocals. Reference finalizer threads will inherit thread local values. But the mail quota usage keeps increasing. Remember, this works fine in one application, but not in other. I'm using the same set of email addresses in both the apps (for from and to). I'm really stuck with this. Appreciate any help. Thank you. Velu

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• Google App Engine - SiteMap Creation for a social network

  - by spidee

  Hi all. I am creating a social tool - I want to allow search engines to pick up "public" user profiles - like twitter and face-book. I have seen all the protocol info at http://www.sitemaps.org and i understand this and how to build such a file - along with an index if i exceed the 50K limit. Where i am struggling is the concept of how i make this run. The site map for my general site pages is simple i can use a tool to create the file - or a script - host the file - submit the file and done. What i then need is a script that will create the site-maps of user profiles. I assume this would be something like: <?xml version="1.0" encoding="UTF-8"?> <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"> <url> <loc>http://www.socialsite.com/profile/spidee</loc> <lastmod>2010-5-12</lastmod> <changefreq>???</changefreq> <priority>???</priority> </url> <url> <loc>http://www.socialsite.com/profile/webbsterisback</loc> <lastmod>2010-5-12</lastmod> <changefreq>???</changefreq> <priority>???</priority> </url> </urlset> Ive added some ??? as i don't know how i should set these settings for my profiles based on the following:- When a new profile is created it must be added to a site-map. If the profile is changed or if "certain" properties are changed - then i don't know if i update the entry in the map - or do something else? (updating would be a nightmare!) Some users may change their profile. In terms of relevance to the search engine the only way a google or yahoo search will find the users (for my requirement) profile would be for example by means of [user name] and [location] so once the entry for the profile has been added to the map file the only reason to have the search-bot re-index the profile would be if the user changed their user-name - which they cant. or their location - and or set their settings so that their profile would be "hidden" from search engines. I assume my map creation will need to be dynamic. From what i have said above i would imagine that creating a new profile and possible editing certain properties could mark it as needing adding/updating in the sitemap. Assuming i will have millions of profiles added/being edited how can i manage this in a sensible manner. i know i need a script that can append urls as each profile is created i know the script will prob be a TASK - running at a set freq - perhaps the profiles have a property like "indexed" and the TASK sets them to "true" when the profiles are added to the map. I dont see the best way to store the map - do i store it in the datastore i.e; model=sitemaps properties key_name=sitemap_xml_1 (and for my map sitemap_index_xml) mapxml=blobstore (the raw xml map or ror map) full=boolean (set true when url count is 50) # might need this as a shard will tell us To make this work my thoughts are m cache the current site map structure as "sitemap_xml" keep a shard of url count when my task executes 1. build the xml structure for say the first 100 urls marked "index==false" (how many could u run at a time?) 2. test if the current mcache sitemap is full (shardcounter+10050K) 3.a if the map is near full create a new map entry in models "sitemap_xml_2" - update the map_index file (also stored in my model as "sitemap_index" start a new shard - or reset.2 3.b if the map is not full grab it from mcache 4.append the 100 url xml structure 5.save / m cache the map I can now add a handler using a url map/route like /sitemaps/* Get my * as map name and serve the maps from the blobstore/mache on the fly. Now my question is does this work - is this the right way or a good way to start? Will this handle the situation of making sure the search bots update when a user changes their profile - possibly by setting the change freq correctly? - Do i need a more advance system :( ? or have i re-invented the wheel! I hope this is all clear and make some form of sense :-)

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• Mozilla Weave can't sync Firefox. What's wrong?

  - by Mehper C. Palavuzlar

  For the last few days, Mozilla Weave can't sync. Below is the activity log. Any ideas? 2010-05-02 20:47:15 Service.Main WARN Unknown error while downloading metadata record. Aborting sync. 2010-05-02 20:47:15 Service.Main CONFIG Starting backoff, next sync at:Sun May 02 2010 21:16:09 GMT+0300 (GTB Yaz Saati) 2010-05-02 20:47:15 Service.Main DEBUG Exception: aborting sync, remote setup failed No traceback available 2010-05-02 21:16:09 Service.Main DEBUG Idle timer created for sync, will sync after 5 seconds of inactivity. 2010-05-02 21:16:30 Net.Resource DEBUG GET success 200 https://sj-weave03.services.mozilla.com/1.0/mehper/storage/meta/global 2010-05-02 21:16:30 Service.Main DEBUG Weave Version: 1.2.3 Local Storage: 2 Remote Storage: 2 2010-05-02 21:26:50 Net.Resource DEBUG GET success 200 https://sj-weave03.services.mozilla.com/1.0/mehper/info/collections 2010-05-02 21:26:50 Engine.Clients INFO 0 outgoing items pre-reconciliation 2010-05-02 21:26:50 Engine.Clients INFO Records: 0 applied, 0 reconciled, 0 left to fetch 2010-05-02 21:26:50 Engine.Clients DEBUG Total (ms): sync 6, processIncoming 3, uploadOutgoing 0, syncStartup 3, syncFinish 0 2010-05-02 21:26:50 Engine.Bookmarks INFO 0 outgoing items pre-reconciliation 2010-05-02 21:26:50 Engine.Bookmarks INFO Records: 0 applied, 0 reconciled, 0 left to fetch 2010-05-02 21:26:50 Engine.Bookmarks DEBUG Total (ms): sync 13, processIncoming 5, uploadOutgoing 0, syncStartup 3, syncFinish 3 2010-05-02 21:26:50 Engine.Forms INFO 1 outgoing items pre-reconciliation 2010-05-02 21:26:50 Engine.Forms INFO Records: 0 applied, 0 reconciled, 0 left to fetch 2010-05-02 21:26:50 Engine.Forms INFO Uploading all of 1 records 2010-05-02 21:26:50 Collection DEBUG POST Length: 388 2010-05-02 21:27:06 Collection DEBUG POST success 200 https://sj-weave03.services.mozilla.com/1.0/mehper/storage/forms 2010-05-02 21:27:06 Engine.Forms DEBUG Total (ms): sync 15924, processIncoming 3, uploadOutgoing 15918, syncStartup 3, syncFinish 0, createRecord 1 2010-05-02 21:27:06 Engine.History INFO 55 outgoing items pre-reconciliation 2010-05-02 21:27:06 Engine.History INFO Records: 0 applied, 0 reconciled, 0 left to fetch 2010-05-02 21:27:09 Engine.History INFO Uploading all of 55 records 2010-05-02 21:27:09 Collection DEBUG POST Length: 35337 2010-05-02 21:27:32 Collection DEBUG POST success 200 https://sj-weave03.services.mozilla.com/1.0/mehper/storage/history 2010-05-02 21:27:32 Engine.History DEBUG Total (ms): sync 25588, processIncoming 4, uploadOutgoing 25580, syncStartup 3, syncFinish 0, createRecord 2540 2010-05-02 21:27:32 Engine.Passwords INFO 0 outgoing items pre-reconciliation 2010-05-02 21:27:32 Engine.Passwords INFO Records: 0 applied, 0 reconciled, 0 left to fetch 2010-05-02 21:27:32 Engine.Passwords DEBUG Total (ms): sync 8, processIncoming 4, uploadOutgoing 0, syncStartup 4, syncFinish 0 2010-05-02 21:27:32 Engine.Prefs INFO 0 outgoing items pre-reconciliation 2010-05-02 21:27:32 Engine.Prefs INFO Records: 0 applied, 0 reconciled, 0 left to fetch 2010-05-02 21:27:32 Engine.Prefs DEBUG Total (ms): sync 8, processIncoming 3, uploadOutgoing 0, syncStartup 4, syncFinish 0 2010-05-02 21:27:32 Engine.Tabs INFO 1 outgoing items pre-reconciliation 2010-05-02 21:27:32 Engine.Tabs INFO Records: 0 applied, 0 reconciled, 0 left to fetch 2010-05-02 21:27:32 Engine.Tabs INFO Uploading all of 1 records 2010-05-02 21:27:32 Collection DEBUG POST Length: 393 2010-05-02 21:27:54 Collection DEBUG POST success 200 https://sj-weave03.services.mozilla.com/1.0/mehper/storage/tabs 2010-05-02 21:27:54 Engine.Tabs DEBUG Total (ms): sync 21943, processIncoming 3, uploadOutgoing 21936, syncStartup 3, syncFinish 0, createRecord 8 2010-05-02 21:27:54 Service.Main INFO Sync completed successfully 2010-05-02 22:27:53 Service.Main DEBUG Idle timer created for sync, will sync after 5 seconds of inactivity. 2010-05-02 22:28:14 Net.Resource DEBUG GET success 200 https://sj-weave03.services.mozilla.com/1.0/mehper/storage/meta/global 2010-05-02 22:28:14 Service.Main DEBUG Weave Version: 1.2.3 Local Storage: 2 Remote Storage: 2 2010-05-02 22:28:16 Net.Resource DEBUG GET fail 503 https://sj-weave03.services.mozilla.com/1.0/mehper/info/collections 2010-05-02 22:28:16 Service.Main DEBUG Exception: aborting sync, failed to get collections No traceback available 2010-05-02 23:28:15 Service.Main DEBUG Idle timer created for sync, will sync after 5 seconds of inactivity. 2010-05-03 00:26:42 Service.Main DEBUG Exception: Could not acquire lock No traceback available 2010-05-03 00:31:03 RecordMgr DEBUG Failed to import record: App. Quitting JS Stack trace: Res__request(...)@resource.js:208 < Res_get()@resource.js:271 < RecordMgr_import("https://sj-weave03.services.mozilla.com/1.0/mehper/storage/meta/global")@wbo.js:119 < WeaveSvc__remoteSetup()@service.js:824 < ()@service.js:1187 < WrappedNotify()@util.js:114 < WrappedLock()@util.js:86 < WrappedCatch()@util.js:65 < sync(false)@service.js:1146 < ([object Object])@service.js:414 < notify([object XPCWrappedNative_NoHelper])@util.js:629 2010-05-03 00:31:03 Service.Main DEBUG Weave Version: 1.2.3 Local Storage: 2 Remote Storage: 2010-05-03 00:31:03 Service.Main WARN Unknown error while downloading metadata record. Aborting sync. 2010-05-03 00:31:03 Service.Main DEBUG Exception: aborting sync, remote setup failed No traceback available 2010-05-03 17:26:25 Service.Main INFO Loading Weave 1.2.3 2010-05-03 17:26:25 Engine.Bookmarks DEBUG Engine initialized 2010-05-03 17:26:25 Engine.Forms DEBUG Engine initialized 2010-05-03 17:26:25 Engine.History DEBUG Engine initialized 2010-05-03 17:26:25 Engine.Passwords DEBUG Engine initialized 2010-05-03 17:26:25 Engine.Prefs DEBUG Engine initialized 2010-05-03 17:26:25 Engine.Tabs DEBUG Engine initialized 2010-05-03 17:26:25 Engine.Tabs DEBUG Resetting tabs last sync time 2010-05-03 17:26:25 Service.Main INFO Mozilla/5.0 (Windows; U; Windows NT 6.1; tr; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 (.NET CLR 3.5.30729) 2010-05-03 17:26:26 Service.Main DEBUG Caching URLs under storage user base: https://sj-weave03.services.mozilla.com/1.0/mehper/ 2010-05-03 17:26:30 Service.Main DEBUG Autoconnecting in 3 seconds 2010-05-03 17:26:36 Service.Main INFO Logging in user mehper 2010-05-03 17:45:46 Service.Main DEBUG Exception: Could not acquire lock No traceback available 2010-05-03 17:53:18 Service.Main DEBUG Exception: Could not acquire lock No traceback available

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• Can anyone point me to some open source directX rendering engines or frameworks? [on hold]

  - by Jim

  I'm completely new to graphics API programmming, but not at all new to the theory and principle operation of game engines and rendering engines. That being said, I want to do some experiments of rendering very dense geometry scenes in a basic rendering engine or game engine. I don't need a lot of bells and whistles. What I need is enough control that I can implement my own scene graph algorithms and control the rendering pipeline very specifically. My ideal candidate engine would be either a rendering engine or game engine with a modular design that might be ready to go out of the box but would be simple enough in case I need to rip out some of the guts in the rendering management and implement my own. It's a tough call because I'm right at the level where it's almost better to go from scratch, but there's no sense in having to build every single basic thing such as heirarchical transforms, etc. I just want to work with rendering optimization to push dense geometry for maximum FPS. Does anyone have a suggestion for an engine or basic framework to use? I requested DirectX in my title because I figured it would likely be better supported and less likely for me to run into some obscure less-documented problem. But OpenGL might be acceptable if the recommended framework was definitely better than my other options. EDIT: I should add that I really want GPU tessellation support (part of adding to the density of geometry detail).

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• appcfg.py upload_data entity kind problem

  - by Dingo

  Hi, I am developing application on app-engine-path and I would like to upload some data to datastore. For example I have a model models/places.py: class Place(db.Model): name = db.StringProperty() longitude = db.FloatProperty() latitude = db.FloatProperty() If I save this in view, kind() of this entity is "models_place". All is ok, Place.all() in view work fine. But: If I upload some next row using appcfg.py upload_data, the kind() of this entities is Place. loader.py look like this: import datetime, os, sys from google.appengine.ext import db from google.appengine.tools import bulkloader libs_path = os.path.join("/home/martin/myproject/src/") if libs_path not in sys.path: sys.path.insert(0, libs_path) from models import places class AlbumLoader(bulkloader.Loader): def __init__(self): bulkloader.Loader.__init__(self, 'Place', [('name', lambda x: x.decode('utf-8')), ('longitude', float), ('latitude', float), ]) loaders = [AlbumLoader] and command for uploading: python /usr/local/google_appengine/appcfg.py upload_data --config_file=places_loader.py --kind=models_place --filename=data/places.csv --url=http://localhost:8000/remote_api /home/martin/myproject/src/

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• URL Parts available to URL Rewrite Rules

  - by The Official Microsoft IIS Site

  URL Rewrite is a powerful URL rewriting tool available for IIS7 and newer.  Your rewriting options are almost unlimited, giving you the ability to optimize URLs for search engine optimization (SEO), support multiple domain names on a single site Read More......( read more ) Read More......(read more)

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• Tom's Halls - A JavaScript Platform Game Engine

  A 2D platform game engine using JavaScript DOM manipulation and CSS

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• Google I/O 2011: Fireside Chat with the App Engine Team

  Google I/O 2011: Fireside Chat with the App Engine Team Max Ross, Max is a Software Engineer on the App Engine team where he leads the development of the datastore & occasionally tinkers with the Java runtime. He is also the founder of the Hibernate Shards project. Alon Levi, Sean Lynch, Greg Dalesandre, Guido van Rossum, Brett Slatkin, Peter Magnusson, Mickey Kataria, Peter McKenzie Fireside chat with the App Engine team From: GoogleDevelopers Views: 2045 5 ratings Time: 01:01:25 More in Entertainment

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• Installing the Spark View Engine into ASP.NET MVC 2 Preview 2

  Learn how to integrate the Spark View Engine into a standard ASP.NET MVC 2 application

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• Google Compute Engine Office Hours: August 22, 2012

  Google Compute Engine Office Hours: August 22, 2012 Office hours with the Google Compute Engine Team on August 22, 2012. The slides can be viewed here: goo.gl The tech talk portion of this session was about OAuth and Service Accounts, an area which the Google Compute Engine team has done a great job simplifying. From: GoogleDevelopers Views: 80 7 ratings Time: 52:42 More in Science & Technology

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• Local Search Engine Optimization - Why Use Local SEO?

  Local search engine optimization is the new optimization technique to help improve ones local efforts in your hometown or local areas a business does business. Local SEO is more useful for companies trying to gain new business within a smaller target range of 5-15 miles sometimes less sometimes more depending on the products or services one might provide to consumers. Local Search Engine Optimization and Normal Search Engine Optimization differs so hiring someone who specializes in local SEO is very important.

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• Rules and advice for logging?

  - by Nick Rosencrantz

  In my organization we've put together some rules / guildelines about logging that I would like to know if you can add to or comment. We use Java but you may comment in general about loggin - rules and advice Use the correct logging level ERROR: Something has gone very wrong and need fixing immediately WARNING: The process can continue without fixing. The application should tolerate this level but the warning should always get investigated. INFO: Information that an important process is finished DEBUG. Is only used during development Make sure that you know what you're logging. Avoid that the logging influences the behavior of the application The function of the logging should be to write messages in the log. Log messages should be descriptive, clear, short and concise. There is not much use of a nonsense message when troubleshooting. Put the right properties in log4j Put in that the right method and class is written automatically. Example: Datedfile -web log4j.rootLogger=ERROR, DATEDFILE log4j.logger.org.springframework=INFO log4j.logger.waffle=ERROR log4j.logger.se.prv=INFO log4j.logger.se.prv.common.mvc=INFO log4j.logger.se.prv.omklassning=DEBUG log4j.appender.DATEDFILE=biz.minaret.log4j.DatedFileAppender log4j.appender.DATEDFILE.layout=org.apache.log4j.PatternLayout log4j.appender.DATEDFILE.layout.ConversionPattern=%d{HH:mm:ss,SSS} %-5p [%C{1}.%M] - %m%n log4j.appender.DATEDFILE.Prefix=omklassning. log4j.appender.DATEDFILE.Suffix=.log log4j.appender.DATEDFILE.Directory=//localhost/WebSphereLog/omklassning/ Log value. Please log values from the application. Log prefix. State which part of the application it is that the logging is written from, preferably with something for the project agreed prefix e.g. PANDORA_DB The amount of text. Be careful so that there is not too much logging text. It can influence the performance of the app. Loggning format: -There are several variants and methods to use with log4j but we would like a uniform use of the following format, when we log at exceptions: logger.error("PANDORA_DB2: Fel vid hämtning av frist i TP210_RAPPORTFRIST", e); In the example above it is assumed that we have set log4j properties so that it automatically write the class and the method. Always use logger and not the following: System.out.println(), System.err.println(), e.printStackTrace() If the web app uses our framework you can get very detailed error information from EJB, if using try-catch in the handler and logging according to the model above: In our project we use this conversion pattern with which method and class names are written out automatically . Here we use two different pattents for console and for datedfileappender: log4j.appender.CONSOLE.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n log4j.appender.DATEDFILE.layout.ConversionPattern=%d [%t] %-5p %c - %m%n In both the examples above method and class wioll be written out. In the console row number will also be written our. toString() Please have a toString() for every object. EX: @Override public String toString() { StringBuilder sb = new StringBuilder(); sb.append(" DwfInformation [ "); sb.append("cc: ").append(cc); sb.append("pn: ").append(pn); sb.append("kc: ").append(kc); sb.append("numberOfPages: ").append(numberOfPages); sb.append("publicationDate: ").append(publicationDate); sb.append("version: ").append(version); sb.append(" ]"); return sb.toString(); } instead of special method which make these outputs public void printAll() { logger.info("inbet: " + getInbetInput()); logger.info("betdat: " + betdat); logger.info("betid: " + betid); logger.info("send: " + send); logger.info("appr: " + appr); logger.info("rereg: " + rereg); logger.info("NY: " + ny); logger.info("CNT: " + cnt); } So is there anything you can add, comment or find questionable with these ways of using the logging? Feel free to answer or comment even if it is not related to Java, Java and log4j is just an implementation of how this is reasoned.

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• Free forum engine with good anti-attack mechanisms

  - by macias

  I am looking for forum engine (for discussions) with good attack countermeasures built in. Windows (preferrably) or Linux. Free (as beer). I think about registration flooding and blocking user accounts attacks. For registration, such engine should have at least: captcha blocking mulitple registrations from the same IP providing login (for logging in) and user name (for displaying the author of the posts) For logging in: no blocking on multiple tries -- instead after X try sending via mail a token, the third piece needed for next login -- without it logging in will be impossible (it would be similar to activation process) The engine should be designed with two ideas in mind: protecting engine against attacks 0 penalty for decent users Thank you in advance for your help and recommendations.

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• Google I/O 2010 - Appstats - instrumentation for App Engine

  Google I/O 2010 - Appstats - instrumentation for App Engine Google I/O 2010 - Appstats - RPC instrumentation and optimizations for App Engine App Engine 201 Guido van Rossum Appstats is a pure userland library (for Python and Java) that inserts instrumentation hooks into the App Engine runtime at the interface between the runtime and services like the datastore. The collected statistics can be browsed in a rich UI which allows drilling down to various levels of detail. The talk will also discuss common optimizations to address typical findings. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 19 0 ratings Time: 59:31 More in Science & Technology

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• Search Engine Optimization Tutorial

  A search engine optimization tutorial is nothing but a manual that educates you on how to go about the processes of search engine optimization. Though it sounds complicated, search engine optimization is not so difficult to carry out and with proper training you can do it too.

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• Google dévoile Compute Engine, son offre IaaS pour concurrencer Amazon EC 2 et Windows Azure

  Google dévoile Compute Engine son offre IaaS pour concurrencer Amazon EC 2 et Windows Azure Le Google I/O, la conférence annuelle des développeurs Google, est riche en annonces. Après la présentation d'Android 4.1, Google Glass et autres, Google dévoile Compute Engine. Le géant de la recherche fait son entrée dans le Cloud IaaS (Infrastructure as a Service) et vient titiller Amazon avec son offre EC 2. Jusqu'ici connu dans ce domaine pour sa plateforme d'hébergement en ligne App Engine, Google étend son catalogue afin de répondre aux besoins de ses...

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• Static GitHub powered blog engine

  - by Daniel Cazzulino

  Blog engines were the new &quot;cool thing to write&quot; after the fever of writing a new DI framework was over. It was kinda like the new &quot;hello world++&quot; example. Almost every single engine uses a database of some sort to keep posts and comments. Almost every one is not leveraging the web as a consequence ;) I was intrigued by the possibilities that a flexible and general-purpose hosting solution like Github could offer for a static blog engine: basically keeping plain markdown/HTML/razor/WLW/whatever files that through a publish/build time process generate static files that pass for a &quot;blog engine&quot;. GitHub even supports custom domain names, so why not? Such an &quot;engine&quot; would have a number of benefits: Plain CSS styling Arbitrary JavaScript Leverage the web infrastructure (caching, CDNs, etc.) ...Read full article

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• SQLAuthority News Bookmark Deprecated Database Engine Features in SQL Server 2008

  When anybody asked me if any specific feature is available in SQL Server 2008 or if any feature will be disabled in future versions of SQL Server, I always point everybody to following list where all the deprecated database engine features are listed. Deprecated Database Engine Features in SQL Server 2008 R2 Deprecated Database Engine [...]...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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• The how of a collision engine

  - by JXPheonix

  This is a very, very broad question - what is the general algorithm of how a collision engine works? No code in specific, but rather, just a general idea of how a collision engine does what it does, constantly refreshing the points of an object and comparing it to other objects? (see, I have the general gist of it here.) A collision engine is basically an engine used in games (generally) so that your player (call him Bob), whenever bob moves into a wall, Bob stops, Bob does not walk through the wall. They also generally handle the gravity in a game and environmental things like that.

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• Search Engine Optimization (SEO) Tips - Code Optimization

  Code optimization is a very important in making your website Search Engine Friendly. A webpage is called Search Engine Friendly when it is coded in such a way that search engines can read and understand it to the maximum. For making your Webpage Search Engine Friendly you have to keep the following factors in mind and code accordingly.

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• 3 Easy Rules For Keyword Optimization

  Keyword optimization is one of the most basic tactics you have to attract free search engine traffic. Even if you are not too familiar with keyword SEO it is way too easy to learn and way too valuable to your business to overlook. It all starts with developing a keyword list and then properly using them in a way that will help increase your website traffic.

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• Google I/O 2010 - What's hot in Java for App Engine

  Google I/O 2010 - What's hot in Java for App Engine Google I/O 2010 - What's hot in Java for App Engine App Engine 201 Toby Reyelts, Don Schwarz Learn what's new with Java on App Engine. We'll take a whirlwind tour through the changes since last year, walk through a code sample for task queues and the new blobstore service, and demonstrate techniques for improving your application's performance. We'll top it off with a glimpse into some new features that we've planned for the year ahead. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 8 0 ratings Time: 01:02:10 More in Science & Technology

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• Google I/O 2012 - Computing Map Tiles with Go on App Engine

  Google I/O 2012 - Computing Map Tiles with Go on App Engine Chris Broadfoot, Andrew Gerrand In this talk we use the Maps API and Go on App Engine to build an app to build custom tile sets for Google Maps. The app demonstrates using Go's suitability for computation in the cloud and App Engine's key scalability features, such as Task Queues and Backends. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 1170 21 ratings Time: 47:22 More in Science & Technology

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• Search Engine Optimization Techniques - Just Try and See

  Using these outstanding search engine optimization techniques will really get you the high search engine ranking you want so bad. I would like to introduce you to the hottest search engine optimization tools that are available for the optimization of your online business. It is not important if is expensive, or cheap, or even if is free, and by the way all of them are FREE; is the fact that it is really effective and that has to be correctly used what matter most.

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