7:29 a.m.
Hi All,
I have integrated drools rule engine 5.0 with GWT WebProject. When I try to call the rule
engine from GWT Applicaiton Engine, I get following exception
java.security.AccessControlException: access denied (java.io.FilePermission C:\Documents
and Settings\vamshidharc\drools.packagebuilder.conf read)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
at java.security.AccessController.checkPermission(AccessController.java:546)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at
com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:139)
at java.lang.SecurityManager.checkRead(SecurityManager.java:871)
at java.io.File.exists(File.java:731)
at org.drools.util.ChainedProperties.loadProperties(ChainedProperties.java:243)
at org.drools.util.ChainedProperties.<init>(ChainedProperties.java:69)
at org.drools.util.ChainedProperties.<init>(ChainedProperties.java:41)
at
org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:167)
at
org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:153)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:242)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:142)
at
org.drools.builder.impl.KnowledgeBuilderProviderImpl.newKnowledgeBuilder(KnowledgeBuilderProviderImpl.java:29)
at
org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:29)
at
com.cura.test.server.RuleEngineInvoker.readKnowledgeBase(RuleEngineInvoker.java:72)
at com.cura.test.server.RuleEngineInvoker.invokeRuleEngine(RuleEngineInvoker.java:51)
at com.cura.test.server.GreetingServiceImpl.getDept(GreetingServiceImpl.java:25)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:527)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:166)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:121)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:54)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at
com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:313)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:844)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:205)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:396)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
does anyone hav idea?
tnx in advance
bye
vamshi
1:58 p.m.
Hi,
I'm having a similar problem. The
KnowledgeBuilderFactory.newKnowledgeBuilder() method is trying to access the
drools.packagebuilder.conf in your C:\Documents and Settings\vamshidharc.
The problem is that even though the method does not require the conf file it
still wants to check and see if one is there and if one is there it will use
it. The google app server does not allow access to your c:\documents and
settings but it will allow access to your appName\war\WEB-INF\.
When you run drools locally the
KnowledgeBuilderFactory.newKnowledgeBuilder() will scan your documents and
folder setting but nothing will be found and will continue normally;
however, when you try to do it from the google app server you will get the
java.io.filepermission error.
I've been trying to figure out a way how to fix this problem but I havn't
figured anything out yet. I was hoping there is a way to modify the default
location for the drools.packagebuilder.conf file, ether through java code
(perhaps using the KnowledgeBuilderConfiguration -- even though I checked
this throughly and couldn't figure out a way) or through a drool's
configuration file.
If anyone has any ideas please let me know.
Thanks,
Ben
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1:26 p.m.
Just a follow up to my last message.
I actually did figure out how to get pass this error. The
knowledgeBuilderFactory.newKnowledgeBuilder() uses the java property
"user.home" to get the user directory. So in order to get around using your
docs and setting folder you need to set the property to something else:
System.setProperty("user.home",
"C:\\workspace\\MyWebApp\\war\\WEB-INF\\classes");
This will allow you to place your conf file in your WEB-INF folder.
From here on it seems like the rule engine works (I got it to fire and
to
print out results). But I do get another secuirty error that I havn't been
able to figure out yet (this one is a bit more obscure).
WARNING: No file found for: /favicon.ico
java.security.AccessControlException: access denied
(java.lang.RuntimePermission accessClassInPackage.sun.misc)
at
java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
at
java.security.AccessController.checkPermission(AccessController.java:546)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at
com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:151)
at java.lang.SecurityManager.checkPackageAccess(SecurityManager.java:1512)
at java.lang.ClassLoader$1.run(ClassLoader.java:327)
at java.security.AccessController.doPrivileged(Native Method)
at java.lang.ClassLoader.checkPackageAccess(ClassLoader.java:325)
at
org.mvel2.optimizers.dynamic.DynamicClassLoader.<clinit>(DynamicClassLoader.java:39)
at
org.mvel2.optimizers.dynamic.DynamicOptimizer._init(DynamicOptimizer.java:46)
at
org.mvel2.optimizers.dynamic.DynamicOptimizer.init(DynamicOptimizer.java:42)
at
org.mvel2.optimizers.OptimizerFactory.setDefaultOptimizer(OptimizerFactory.java:106)
at org.mvel2.optimizers.OptimizerFactory.<clinit>(OptimizerFactory.java:64)
at
org.drools.rule.builder.dialect.java.AbstractJavaRuleBuilder.<clinit>(AbstractJavaRuleBuilder.java:27)
at
org.drools.rule.builder.dialect.java.JavaDialect.<clinit>(JavaDialect.java:98)
at
org.drools.rule.builder.dialect.java.JavaDialectConfiguration.newDialect(JavaDialectConfiguration.java:65)
at
org.drools.compiler.PackageBuilderConfiguration.buildDialectRegistry(PackageBuilderConfiguration.java:291)
at org.drools.compiler.PackageRegistry.<init>(PackageRegistry.java:24)
at org.drools.compiler.PackageBuilder.newPackage(PackageBuilder.java:874)
at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:592)
at
org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:290)
at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:488)
at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:25)
at com.mycompany.mywebapp.server.RPTest.readKnowledgeBase(RPTest.java:101)
at com.mycompany.mywebapp.server.RPTest.fire(RPTest.java:59)
at
com.mycompany.mywebapp.server.GreetingServiceImpl.greetServer(GreetingServiceImpl.java:25)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:100)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:562)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:188)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:224)
at
com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:51)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:121)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at
com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:352)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506)
at
org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:844)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:205)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:396)
at
org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
My best guess is that I need to modify something in the ResourceBuilder
configuration.
Regards,
Ben
--
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vamshidhar reddy chitti