Hi Dunith, Thanks for the reply. jdbc url , UN and PW are configured in a xml.
This works for many queries but exception is thrown in few cases only. Regards, Ishara Cooray Senior Software Engineer Mobile : +9477 262 9512 WSO2, Inc. | http://wso2.com/ Lean . Enterprise . Middleware On Fri, Aug 29, 2014 at 11:31 AM, Dunith Dhanushka <[email protected]> wrote: > Hi Ishara, > > When creating a Database object, you have to pass the JDBC URL and the > database credentials as follows. > > var db = new Database("jdbc:h2:tmp/demo", "admin", "admin"); > > Please follow the Jaggery documentation on Databases at [1] > > [1] http://jaggeryjs.org/documentation.jag?api=rdb > > Regards, > Dunith > > > On Fri, Aug 29, 2014 at 10:52 AM, Ishara Cooray <[email protected]> wrote: > >> my function is as follow and NPE is thrown @ db = new Database("db") >> >> var executeQuery = function(queryString) { >> var results ; >> var db = null; >> try{ >> >> db = new Database("db");// error here >> >> 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; >> } >> >> Ishara Cooray >> Senior Software Engineer >> Mobile : +9477 262 9512 >> WSO2, Inc. | http://wso2.com/ >> Lean . Enterprise . Middleware >> >> >> On Thu, Aug 28, 2014 at 6:48 PM, Ishara Cooray <[email protected]> wrote: >> >>> 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 >>> >> >> >> _______________________________________________ >> Dev mailing list >> [email protected] >> http://wso2.org/cgi-bin/mailman/listinfo/dev >> >> > > > -- > Regards, > > Dunith Dhanushka, > Senior Software Engineer - BAM, > WSO2 Inc, > > Mobile - +94 71 8615744 > Blog - dunithd.wordpress.com <http://blog.dunith.com> > Twitter - @dunithd <http://twitter.com/dunithd> >
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