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POIs there any way to log logs in file in GAE GWT application?
 

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  1. POIs there any way to log logs in file in GAE GWT application?
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    <p>I am new to GAE GWT Application. I am developing a GAE - GWT application with spring MVC 3 as service provider and GWT as UI client (I am not comfortable using GWT's RPC concept, so I started using spring) and log4j (v1.2.17) &amp; log4j-gwt-1.0` for logging. Now I need to log the "logs" in a file.</p> <p>But when coding, it seems, GWT accepts <code>ConsoleAppender</code> but not <code>FileAppender</code> or <code>RollingFileAppender</code>.</p> <p>How to configure log4j in GWT to log the "(server)logs" in a separate file?</p> <p>My log4j.properties file <code></p> <pre><code># A default log4j configuration for log4j users. # # To use this configuration, deploy it into your application's WEB-INF/classes # directory. You are also encouraged to edit it as you like. # Set root logger level to DEBUG and its only appender to A1. log4j.rootLogger=DEBUG, A1 # Configure the console as our one appender log4j.appender.A1=org.apache.log4j.FileAppender log4j.appender.A1.layout=org.apache.log4j.PatternLayout log4j.appender.A1.layout.ConversionPattern=%d{HH:mm:ss,SSS} %-5p [%c] - %m%n log4j.appender.A1.File=/logger.log log4j.appender.A1.MaxFileSize=10MB # Keep one backup file log4j.appender.A1.MaxBackupIndex=1 # tighten logging on the DataNucleus Categories log4j.category.DataNucleus.JDO=WARN, A1 log4j.category.DataNucleus.Persistence=WARN, A1 log4j.category.DataNucleus.Cache=WARN, A1 log4j.category.DataNucleus.MetaData=WARN, A1 log4j.category.DataNucleus.General=WARN, A1 log4j.category.DataNucleus.Utility=WARN, A1 log4j.category.DataNucleus.Transaction=WARN, A1 log4j.category.DataNucleus.Datastore=WARN, A1 log4j.category.DataNucleus.ClassLoading=WARN, A1 log4j.category.DataNucleus.Plugin=WARN, A1 log4j.category.DataNucleus.ValueGeneration=WARN, A1 log4j.category.DataNucleus.Enhancer=WARN, A1 log4j.category.DataNucleus.SchemaTool=WARN, A1 </code></pre> <p></code> and My code snippet. <code></p> <pre><code>import org.apache.log4j.Logger; final private static Logger LOGGER = Logger.getLogger("RegistrationController"); </code></pre> <p></code></p> <p>Exception :</p> <p><code></p> <pre><code>java.lang.NoClassDefFoundError: java.io.FileOutputStream is a restricted class. Please see the Google App Engine developer's guide for more details. at com.google.appengine.tools.development.agent.runtime.Runtime.reject(Runtime.java:51) at org.apache.log4j.FileAppender.setFile(FileAppender.java:294) at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:165) at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:307) at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:172) at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:104) at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:842) at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:768) at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:648) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:514) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:580) at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:526) at org.apache.log4j.LogManager.&lt;clinit&gt;(LogManager.java:127) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:190) at com.google.appengine.tools.development.agent.runtime.RuntimeHelper.checkRestricted(RuntimeHelper.java:70) at com.google.appengine.tools.development.agent.runtime.Runtime.checkRestricted(Runtime.java:64) at org.apache.log4j.Logger.getLogger(Logger.java:104) at org.apache.commons.logging.impl.Log4JLogger.getLogger(Log4JLogger.java:262) at org.apache.commons.logging.impl.Log4JLogger.&lt;init&gt;(Log4JLogger.java:108) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance_(Runtime.java:127) at com.google.appengine.tools.development.agent.runtime.Runtime.newInstance(Runtime.java:135) at org.apache.commons.logging.impl.LogFactoryImpl.createLogFromClass(LogFactoryImpl.java:1025) at org.apache.commons.logging.impl.LogFactoryImpl.discoverLogImplementation(LogFactoryImpl.java:844) at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:541) at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:292) at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:671) at org.springframework.web.servlet.DispatcherServlet.&lt;clinit&gt;(DispatcherServlet.java:246) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at java.lang.Class.newInstance(Class.java:374) at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153) at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:428) at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:263) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685) at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:224) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:249) at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:306) at com.google.appengine.tools.development.AutomaticInstanceHolder.startUp(AutomaticInstanceHolder.java:26) at com.google.appengine.tools.development.AbstractModule.startup(AbstractModule.java:79) at com.google.appengine.tools.development.Modules.startup(Modules.java:88) at com.google.appengine.tools.development.DevAppServerImpl$2.run(DevAppServerImpl.java:383) at com.google.appengine.tools.development.DevAppServerImpl$2.run(DevAppServerImpl.java:376) at java.security.AccessController.doPrivileged(Native Method) at com.google.appengine.tools.development.DevAppServerImpl.restart(DevAppServerImpl.java:376) at com.google.appengine.tools.development.gwt.AppEngineLauncher$AppEngineServletContainer.refresh(AppEngineLauncher.java:51) at com.google.gwt.dev.DevMode.onRestartServer(DevMode.java:349) at com.google.gwt.dev.shell.remoteui.RemoteUI.restartWebServer(RemoteUI.java:166) at com.google.gwt.dev.shell.remoteui.DevModeServiceRequestProcessor.processRestartServer(DevModeServiceRequestProcessor.java:94) at com.google.gwt.dev.shell.remoteui.DevModeServiceRequestProcessor.execute(DevModeServiceRequestProcessor.java:59) at com.google.gwt.dev.shell.remoteui.MessageTransport.processClientRequest(MessageTransport.java:362) at com.google.gwt.dev.shell.remoteui.MessageTransport.processMessage(MessageTransport.java:404) at com.google.gwt.dev.shell.remoteui.MessageTransport.access$400(MessageTransport.java:44) at com.google.gwt.dev.shell.remoteui.MessageTransport$3.run(MessageTransport.java:322) at java.lang.Thread.run(Thread.java:724) log4j:WARN No appenders could be found for logger (org.springframework.web.servlet.DispatcherServlet). </code></pre> <p></code></p> <p>Is there any way to log the logs in a file instead of console? If not, how to get the console logs, once it is deployed in GAE?</p>
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    1. PTQuestion
    1. USGowtham Shanmugaraj
    1. USGowtham Shanmugaraj
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