I have a function which does
1. create Database connection
2. execute query
3. close the db connection
var executeQuery = function(queryString) {
var results ;
var db = null;
try{
var db = new Database("db");
results = db.query(queryString);
} catch (e) {
log.error(e);
throw "Error while accessing database
" + " : " + e.message;
}finally{
if(db!=null){
db.close();
log.info("db closed");
}
}
return results;
}
i use this function when a sql is needed to be executed.
But in some cases, when try to create new Database connection it gives
below NullPointer Exception
[2014-08-28 18:19:46,849] ERROR {JAGGERY.modules.database.dataaccess:jag}
- org.mozilla.javascript.WrappedException: Wrapped
java.lang.NullPointerException
(/cloudmgt/modules/database/dataaccess.jag#21)
at
org.mozilla.javascript.Context.throwAsScriptRuntimeEx(Context.java:1754)
at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:148)
at org.mozilla.javascript.FunctionObject.call(FunctionObject.java:392)
at org.mozilla.javascript.BaseFunction.construct(BaseFunction.java:343)
at
org.mozilla.javascript.ScriptRuntime.newObject(ScriptRuntime.java:2349)
at
org.jaggeryjs.rhino.cloudmgt.modules.database.c0._c_anonymous_1(/cloudmgt/modules/database/dataaccess.jag:21)
at
org.jaggeryjs.rhino.cloudmgt.modules.database.c0.call(/cloudmgt/modules/database/dataaccess.jag)
at
org.mozilla.javascript.ScriptRuntime.applyOrCall(ScriptRuntime.java:2430)
at org.mozilla.javascript.BaseFunction.execIdCall(BaseFunction.java:269)
at
org.mozilla.javascript.IdFunctionObject.call(IdFunctionObject.java:97)
at org.mozilla.javascript.optimizer.OptRuntime.call2(OptRuntime.java:42)
at
org.jaggeryjs.rhino.cloudmgt.modules.database.c2._c_anonymous_2(/cloudmgt/modules/database/module.jag:8)
at
org.jaggeryjs.rhino.cloudmgt.modules.database.c2.call(/cloudmgt/modules/database/module.jag)
at org.mozilla.javascript.optimizer.OptRuntime.call2(OptRuntime.java:42)
at
org.jaggeryjs.rhino.cloudmgt.modules.tenant.users.add.c0._c_getTenantDisplayName_3(/cloudmgt/modules/tenant/users/add/add.jag:63)
at
org.jaggeryjs.rhino.cloudmgt.modules.tenant.users.add.c0.call(/cloudmgt/modules/tenant/users/add/add.jag)
at
org.mozilla.javascript.optimizer.OptRuntime.callName(OptRuntime.java:63)
at
org.jaggeryjs.rhino.cloudmgt.modules.tenant.users.add.c0._c_anonymous_6(/cloudmgt/modules/tenant/users/add/add.jag:132)
at
org.jaggeryjs.rhino.cloudmgt.modules.tenant.users.add.c0.call(/cloudmgt/modules/tenant/users/add/add.jag)
at
org.mozilla.javascript.optimizer.OptRuntime.callName(OptRuntime.java:63)
at
org.jaggeryjs.rhino.cloudmgt.modules.tenant.users.add.c0._c_sendUserInvite_8(/cloudmgt/modules/tenant/users/add/add.jag:213)
at
org.jaggeryjs.rhino.cloudmgt.modules.tenant.users.add.c0.call(/cloudmgt/modules/tenant/users/add/add.jag)
at
org.mozilla.javascript.ScriptRuntime.applyOrCall(ScriptRuntime.java:2430)
at org.mozilla.javascript.BaseFunction.execIdCall(BaseFunction.java:269)
at
org.mozilla.javascript.IdFunctionObject.call(IdFunctionObject.java:97)
at org.mozilla.javascript.optimizer.OptRuntime.call2(OptRuntime.java:42)
at
org.jaggeryjs.rhino.cloudmgt.modules.tenant.c0._c_anonymous_8(/cloudmgt/modules/tenant/module.jag:26)
at
org.jaggeryjs.rhino.cloudmgt.modules.tenant.c0.call(/cloudmgt/modules/tenant/module.jag)
at org.mozilla.javascript.optimizer.OptRuntime.call2(OptRuntime.java:42)
at
org.jaggeryjs.rhino.cloudmgt.site.blocks.tenant.users.add.ajax.c0._c_anonymous_1(/cloudmgt/site/blocks/tenant/users/add/ajax/add.jag:82)
at
org.jaggeryjs.rhino.cloudmgt.site.blocks.tenant.users.add.ajax.c0.call(/cloudmgt/site/blocks/tenant/users/add/ajax/add.jag)
at org.mozilla.javascript.optimizer.OptRuntime.call0(OptRuntime.java:23)
at
org.jaggeryjs.rhino.cloudmgt.site.blocks.tenant.users.add.ajax.c0._c_script_0(/cloudmgt/site/blocks/tenant/users/add/ajax/add.jag:6)
at
org.jaggeryjs.rhino.cloudmgt.site.blocks.tenant.users.add.ajax.c0.call(/cloudmgt/site/blocks/tenant/users/add/ajax/add.jag)
at
org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:394)
at
org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3091)
at
org.jaggeryjs.rhino.cloudmgt.site.blocks.tenant.users.add.ajax.c0.call(/cloudmgt/site/blocks/tenant/users/add/ajax/add.jag)
at
org.jaggeryjs.rhino.cloudmgt.site.blocks.tenant.users.add.ajax.c0.exec(/cloudmgt/site/blocks/tenant/users/add/ajax/add.jag)
at
org.jaggeryjs.scriptengine.engine.RhinoEngine.execScript(RhinoEngine.java:570)
at
org.jaggeryjs.scriptengine.engine.RhinoEngine.exec(RhinoEngine.java:273)
at
org.jaggeryjs.jaggery.core.manager.WebAppManager.execute(WebAppManager.java:432)
at
org.jaggeryjs.jaggery.core.JaggeryServlet.doPost(JaggeryServlet.java:29)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:755)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:379)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at
org.jaggeryjs.jaggery.core.JaggeryFilter.doFilter(JaggeryFilter.java:21)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at
org.wso2.carbon.tomcat.ext.valves.CompositeValve.continueInvocation(CompositeValve.java:178)
at
org.wso2.carbon.tomcat.ext.valves.CarbonTomcatValve$1.invoke(CarbonTomcatValve.java:47)
at
org.wso2.carbon.webapp.mgt.TenantLazyLoaderValve.invoke(TenantLazyLoaderValve.java:56)
at
org.wso2.carbon.tomcat.ext.valves.TomcatValveContainer.invokeValves(TomcatValveContainer.java:47)
at
org.wso2.carbon.tomcat.ext.valves.CompositeValve.invoke(CompositeValve.java:141)
at
org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:156)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at
org.wso2.carbon.tomcat.ext.valves.CarbonContextCreatorValve.invoke(CarbonContextCreatorValve.java:52)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1653)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NullPointerException
at
org.jaggeryjs.hostobjects.db.DatabaseHostObject.jsConstructor(DatabaseHostObject.java:87)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:126)
... 72 more
Is there a way to synchronize the function in Jaggery or any other
suggestion to get rid from this error?
Any help would be appreciated.
Thanks.
Ishara Cooray
Senior Software Engineer
Mobile : +9477 262 9512
WSO2, Inc. | http://wso2.com/
Lean . Enterprise . Middleware
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