Re: Namespace list - blueprint - xpath
Thanks Aki for your thoughts .. Yes, I should call setNamespaces() .. but I need namespace Map which I can pass to .. So, my question remain same .. is there any API or service .. which I can use to get Namespace Map .. And I hv Camel Exchange and Camel Endpoint object with me .. Parsing blueprint beans.xml and to extract Namespace from blueprint tag; looks hack and dirty way .. Also, I don't know how can I get beans.xml InputStream to parse for .. I also debugged and found that .. for standard xpath tag having namespace xpath in beans.xml .. the blueprint container do magic to pass all namespace while creating xpath expression object. It means; namespace list is with blueprint container .. but I don't know how I can reached to there when I only have Camel Exchange and Endpoint object with me. Thanks, Nurali On Thursday, October 31, 2013 9:24 PM, Aki Yoshida elak...@gmail.com wrote: for the first part of the question, maybe you forgot the set the namespace context (the prefix-nsuri map) in the expression? setNamespaces(MapString,String namespaces) for the second part, you probably need to parse the file that will scan all the namespaces declared and you will see them in the corresponding namespace declaration handler. 2013/10/31 Nurali Techie nurali.tec...@yahoo.com: Hi Friends, I want to execute xpath in my code. It means; I have xpath expression, I have exchange object with In Message. Using 'XPathExpression' and 'XPathBuilder' classes; I succeed to do so. Below is the code snippet. XPathExpression xpathExprObj = new XPathExpression(/userResponse/User/id); xpathExprObj.setResultType(String.class); Object result = xpathExprObj.evaluate(exchange, Object.class); But, if I have xpath with namespace (i.e xpath = /ns0:userResponse/User/id).. above code throwing exception .. saying - Prefix must resolve to a namespace: ns0 Part of Exception: org.apache.camel.builder.xml.InvalidXPathExpression: Invalid xpath: /ns0:userResponse/User/id. Reason: javax.xml.xpath.XPathExpressionException at org.apache.camel.builder.xml.XPathBuilder.evaluateAs(XPathBuilder.java:767) ~[bundlefile:2.11.2-sap-02] at org.apache.camel.builder.xml.XPathBuilder.evaluate(XPathBuilder.java:748) ~[bundlefile:2.11.2-sap-02] at org.apache.camel.builder.xml.XPathBuilder.evaluate(XPathBuilder.java:168) ~[bundlefile:2.11.2-sap-02] at *** My project code calling from here .. .. --- Caused by: com.sun.org.apache.xpath.internal.domapi.XPathStylesheetDOM3Exception: Prefix must resolve to a namespace: ns0 at com.sun.org.apache.xpath.internal.compiler.XPathParser.errorForDOM3(XPathParser.java:653) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.compiler.Lexer.mapNSTokens(Lexer.java:638) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.compiler.Lexer.tokenize(Lexer.java:265) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.compiler.Lexer.tokenize(Lexer.java:96) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.compiler.XPathParser.initXPath(XPathParser.java:110) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.XPath.init(XPath.java:176) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.XPath.init(XPath.java:264) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.jaxp.XPathImpl.compile(XPathImpl.java:385) ~[na:1.6.0_33] Upon digging; I found that .. I need to set namespaces to XPathExpression object .. So, I need list of all namespace. I am using blueprint beans.xml .. so I need list of all namespaces defined with blueprint tag in beans.xml. I have camel exchange and camel endpoint object with me. I want programmatic solution. Thanks, Nurali
Re: Namespace list - blueprint - xpath
Hi All, I have got the solution .. :) I have used xpath expression to get all namespace. Here is the part of code: String searchAllNamespacesXpathExpr = //namespace::*; // xpath expr to search all namespace XPathExpression nsXpath = new XPathExpression(searchAllNamespacesXpathExpr); nsXpath.setResultType(NodeList.class); NodeList nsNodeList = (NodeList) nsXpath.evaluate(exchange, Object.class); // this NodeList contains all namespaces From NodeList object, I prepare namespace Map which I set to XpathExpression object. XPathExpression xpathExprObj = new XPathExpression(/ns0:userResponse/User/id)); xpathExprObj.setNamespaces(namespaceMap); // set namespace Map which was prepared from NodeList xpathExprObj.setResultType(String.class); Object result = xpathExprObj.evaluate(exchange, Object.class); Now, xpath with namespace (i.e /ns0:userResponse/User/id) will be evaluated correctly. Thanks Aki and All for you help. Let me know; in case you see any flaw in above way. Cheers, Nurali On Friday, November 1, 2013 2:50 PM, Nurali Techie nurali.tec...@yahoo.com wrote: Thanks Aki for your thoughts .. Yes, I should call setNamespaces() .. but I need namespace Map which I can pass to .. So, my question remain same .. is there any API or service .. which I can use to get Namespace Map .. And I hv Camel Exchange and Camel Endpoint object with me .. Parsing blueprint beans.xml and to extract Namespace from blueprint tag; looks hack and dirty way .. Also, I don't know how can I get beans.xml InputStream to parse for .. I also debugged and found that .. for standard xpath tag having namespace xpath in beans.xml .. the blueprint container do magic to pass all namespace while creating xpath expression object. It means; namespace list is with blueprint container .. but I don't know how I can reached to there when I only have Camel Exchange and Endpoint object with me. Thanks, Nurali On Thursday, October 31, 2013 9:24 PM, Aki Yoshida elak...@gmail.com wrote: for the first part of the question, maybe you forgot the set the namespace context (the prefix-nsuri map) in the expression? setNamespaces(MapString,String namespaces) for the second part, you probably need to parse the file that will scan all the namespaces declared and you will see them in the corresponding namespace declaration handler. 2013/10/31 Nurali Techie nurali.tec...@yahoo.com: Hi Friends, I want to execute xpath in my code. It means; I have xpath expression, I have exchange object with In Message. Using 'XPathExpression' and 'XPathBuilder' classes; I succeed to do so. Below is the code snippet. XPathExpression xpathExprObj = new XPathExpression(/userResponse/User/id); xpathExprObj.setResultType(String.class); Object result = xpathExprObj.evaluate(exchange, Object.class); But, if I have xpath with namespace (i.e xpath = /ns0:userResponse/User/id).. above code throwing exception .. saying - Prefix must resolve to a namespace: ns0 Part of Exception: org.apache.camel.builder.xml.InvalidXPathExpression: Invalid xpath: /ns0:userResponse/User/id. Reason: javax.xml.xpath.XPathExpressionException at org.apache.camel.builder.xml.XPathBuilder.evaluateAs(XPathBuilder.java:767) ~[bundlefile:2.11.2-sap-02] at org.apache.camel.builder.xml.XPathBuilder.evaluate(XPathBuilder.java:748) ~[bundlefile:2.11.2-sap-02] at org.apache.camel.builder.xml.XPathBuilder.evaluate(XPathBuilder.java:168) ~[bundlefile:2.11.2-sap-02] at *** My project code calling from here .. .. --- Caused by: com.sun.org.apache.xpath.internal.domapi.XPathStylesheetDOM3Exception: Prefix must resolve to a namespace: ns0 at com.sun.org.apache.xpath.internal.compiler.XPathParser.errorForDOM3(XPathParser.java:653) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.compiler.Lexer.mapNSTokens(Lexer.java:638) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.compiler.Lexer.tokenize(Lexer.java:265) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.compiler.Lexer.tokenize(Lexer.java:96) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.compiler.XPathParser.initXPath(XPathParser.java:110) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.XPath.init(XPath.java:176) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.XPath.init(XPath.java:264) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.jaxp.XPathImpl.compile(XPathImpl.java:385) ~[na:1.6.0_33] Upon digging; I found that .. I need to set namespaces to XPathExpression object .. So, I need list of all namespace. I am using blueprint beans.xml .. so I need list of all namespaces defined with blueprint tag in beans.xml. I have camel exchange and camel endpoint object with me. I want programmatic solution. Thanks, Nurali
Namespace list - blueprint - xpath
Hi Friends, I want to execute xpath in my code. It means; I have xpath expression, I have exchange object with In Message. Using 'XPathExpression' and 'XPathBuilder' classes; I succeed to do so. Below is the code snippet. XPathExpression xpathExprObj = new XPathExpression(/userResponse/User/id); xpathExprObj.setResultType(String.class); Object result = xpathExprObj.evaluate(exchange, Object.class); But, if I have xpath with namespace (i.e xpath = /ns0:userResponse/User/id).. above code throwing exception .. saying - Prefix must resolve to a namespace: ns0 Part of Exception: org.apache.camel.builder.xml.InvalidXPathExpression: Invalid xpath: /ns0:userResponse/User/id. Reason: javax.xml.xpath.XPathExpressionException at org.apache.camel.builder.xml.XPathBuilder.evaluateAs(XPathBuilder.java:767) ~[bundlefile:2.11.2-sap-02] at org.apache.camel.builder.xml.XPathBuilder.evaluate(XPathBuilder.java:748) ~[bundlefile:2.11.2-sap-02] at org.apache.camel.builder.xml.XPathBuilder.evaluate(XPathBuilder.java:168) ~[bundlefile:2.11.2-sap-02] at *** My project code calling from here .. .. --- Caused by: com.sun.org.apache.xpath.internal.domapi.XPathStylesheetDOM3Exception: Prefix must resolve to a namespace: ns0 at com.sun.org.apache.xpath.internal.compiler.XPathParser.errorForDOM3(XPathParser.java:653) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.compiler.Lexer.mapNSTokens(Lexer.java:638) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.compiler.Lexer.tokenize(Lexer.java:265) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.compiler.Lexer.tokenize(Lexer.java:96) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.compiler.XPathParser.initXPath(XPathParser.java:110) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.XPath.init(XPath.java:176) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.XPath.init(XPath.java:264) ~[na:1.6.0_33] at com.sun.org.apache.xpath.internal.jaxp.XPathImpl.compile(XPathImpl.java:385) ~[na:1.6.0_33] Upon digging; I found that .. I need to set namespaces to XPathExpression object .. So, I need list of all namespace. I am using blueprint beans.xml .. so I need list of all namespaces defined with blueprint tag in beans.xml. I have camel exchange and camel endpoint object with me. I want programmatic solution. Thanks, Nurali
Re: Memory leak - when an exception is thrown during the scheduling phase
Thanks James for the response .. I have created Jira issue. https://issues.apache.org/jira/browse/CAMEL-6832 Yes, I know which code causing this issue and how to fix that. But I don't know other usecases (around the code where the fix needed). I will spend some time and will update my finding/fix in Jira issue. @All, Please follow Jira issue for further details. Thanks, Nurali From: James Carman ja...@carmanconsulting.com To: users@camel.apache.org users@camel.apache.org; Nurali Techie nurali.tec...@yahoo.com Sent: Friday, October 4, 2013 4:32 PM Subject: Re: Memory leak - when an exception is thrown during the scheduling phase Create a JIRA. Looks like you may have a patch in mind? Do you have test cases? On Friday, October 4, 2013, Nurali Techie wrote: Hello, I have observed a memory leak for Quartz worker thread in case an exception is thrown during the scheduling phase when schedule is set to past time. I have observed this issue with camel-quart 2.10.4, 2.11.0, 2.11.2 versions. For ex, assuming today is 4-Oct; If a schedule is provided for yesterday (i.e 3-Oct) then below sequence happen: 1. Quartz create worker thread for new schedule [generally TEN Threads with name 'DefaultQuartzScheduler'] 2. Camel-quartz increment jobCounter for scheduler context [using QuartzComponent.incrementJobCounter()] 3. Camel-quartz tries to create new schedule [using Scheduler.scheduleJob()] 4. scheduleJob() throws SchedulerException with the message - 'Based on configured schedule, the given trigger will never fire' 5. Camel-quartz does NOT decrement the job counter and jobCounter value remains '1' 6. Later Camel-Quartz stops the route and call QuartzComponent.doStop() 7. In doStop(), Scheduler.shutdown() supposed to be called so that those TEN threads are removed but to call shutdown() the pre-condition is that the jobCounter should be '0'. In this case jobCounter is '1' and Scheduler.shutdown() will NOT be called and those TEN threads are NOT removed. This is memory leak. Please find the stack trace [with Camel-Quartz 2.11.2 and org.apache.servicemix.bundles.quartz-1.8.6_1 which wrapped Quartz Scheduler as OSGi bundle] when SchedulerException is thrown at step 4 in above sequence. Let me know if you want me to create JIRA issue. Thanks, Nurali ** Stack Trace: 15:55:22.432 ERROR [Blueprint Extender: 1] o.a.c.b.BlueprintCamelContext [BlueprintCamelContext.java:139] - Error occurred during starting Camel: CamelContext(sfsftest35) due Based on configured schedule, the given trigger will never fire. org.quartz.SchedulerException: Based on configured schedule, the given trigger will never fire. at org.quartz.core.QuartzScheduler.scheduleJob(QuartzScheduler.java:793) ~[na:na] at org.quartz.impl.StdScheduler.scheduleJob(StdScheduler.java:243) ~[na:na] at org.apache.camel.component.quartz.QuartzComponent.doAddJob(QuartzComponent.java:232) ~[na:na] at org.apache.camel.component.quartz.QuartzComponent.addJob(QuartzComponent.java:222) ~[na:na] at org.apache.camel.component.quartz.QuartzEndpoint.addTrigger(QuartzEndpoint.java:81) ~[na:na] at org.apache.camel.component.quartz.QuartzEndpoint.consumerStarted(QuartzEndpoint.java:213) ~[na:na] at org.apache.camel.component.quartz.QuartzConsumer.doStart(QuartzConsumer.java:39) ~[na:na] at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.startService(DefaultCamelContext.java:1819) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.doStartOrResumeRouteConsumers(DefaultCamelContext.java:2113) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.doStartRouteConsumers(DefaultCamelContext.java:2049) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.safelyStartRouteServices(DefaultCamelContext.java:1979) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.doStartOrResumeRoutes(DefaultCamelContext.java:1758) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.doStartCamel(DefaultCamelContext.java:1633) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.doStart(DefaultCamelContext.java:1500) ~[na:na] at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.start(DefaultCamelContext.java:1468) ~[na:na] at org.apache.camel.blueprint.BlueprintCamelContext.start(BlueprintCamelContext.java:167) [bundlefile:2.11.2] at org.apache.camel.blueprint.BlueprintCamelContext.maybeStart(BlueprintCamelContext.java:199) [bundlefile:2.11.2] at org.apache.camel.blueprint.BlueprintCamelContext.serviceChanged(BlueprintCamelContext.java:137) [bundlefile:2.11.2] at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107) [org.eclipse.org.eclipse.osgi-3.8.0.v20120529-1548.jar:na] at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861
Memory leak - when an exception is thrown during the scheduling phase
Hello, I have observed a memory leak for Quartz worker thread in case an exception is thrown during the scheduling phase when schedule is set to past time. I have observed this issue with camel-quart 2.10.4, 2.11.0, 2.11.2 versions. For ex, assuming today is 4-Oct; If a schedule is provided for yesterday (i.e 3-Oct) then below sequence happen: 1. Quartz create worker thread for new schedule [generally TEN Threads with name 'DefaultQuartzScheduler'] 2. Camel-quartz increment jobCounter for scheduler context [using QuartzComponent.incrementJobCounter()] 3. Camel-quartz tries to create new schedule [using Scheduler.scheduleJob()] 4. scheduleJob() throws SchedulerException with the message - 'Based on configured schedule, the given trigger will never fire' 5. Camel-quartz does NOT decrement the job counter and jobCounter value remains '1' 6. Later Camel-Quartz stops the route and call QuartzComponent.doStop() 7. In doStop(), Scheduler.shutdown() supposed to be called so that those TEN threads are removed but to call shutdown() the pre-condition is that the jobCounter should be '0'. In this case jobCounter is '1' and Scheduler.shutdown() will NOT be called and those TEN threads are NOT removed. This is memory leak. Please find the stack trace [with Camel-Quartz 2.11.2 and org.apache.servicemix.bundles.quartz-1.8.6_1 which wrapped Quartz Scheduler as OSGi bundle] when SchedulerException is thrown at step 4 in above sequence. Let me know if you want me to create JIRA issue. Thanks, Nurali ** Stack Trace: 15:55:22.432 ERROR [Blueprint Extender: 1] o.a.c.b.BlueprintCamelContext [BlueprintCamelContext.java:139] - Error occurred during starting Camel: CamelContext(sfsftest35) due Based on configured schedule, the given trigger will never fire. org.quartz.SchedulerException: Based on configured schedule, the given trigger will never fire. at org.quartz.core.QuartzScheduler.scheduleJob(QuartzScheduler.java:793) ~[na:na] at org.quartz.impl.StdScheduler.scheduleJob(StdScheduler.java:243) ~[na:na] at org.apache.camel.component.quartz.QuartzComponent.doAddJob(QuartzComponent.java:232) ~[na:na] at org.apache.camel.component.quartz.QuartzComponent.addJob(QuartzComponent.java:222) ~[na:na] at org.apache.camel.component.quartz.QuartzEndpoint.addTrigger(QuartzEndpoint.java:81) ~[na:na] at org.apache.camel.component.quartz.QuartzEndpoint.consumerStarted(QuartzEndpoint.java:213) ~[na:na] at org.apache.camel.component.quartz.QuartzConsumer.doStart(QuartzConsumer.java:39) ~[na:na] at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.startService(DefaultCamelContext.java:1819) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.doStartOrResumeRouteConsumers(DefaultCamelContext.java:2113) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.doStartRouteConsumers(DefaultCamelContext.java:2049) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.safelyStartRouteServices(DefaultCamelContext.java:1979) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.doStartOrResumeRoutes(DefaultCamelContext.java:1758) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.doStartCamel(DefaultCamelContext.java:1633) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.doStart(DefaultCamelContext.java:1500) ~[na:na] at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) ~[na:na] at org.apache.camel.impl.DefaultCamelContext.start(DefaultCamelContext.java:1468) ~[na:na] at org.apache.camel.blueprint.BlueprintCamelContext.start(BlueprintCamelContext.java:167) [bundlefile:2.11.2] at org.apache.camel.blueprint.BlueprintCamelContext.maybeStart(BlueprintCamelContext.java:199) [bundlefile:2.11.2] at org.apache.camel.blueprint.BlueprintCamelContext.serviceChanged(BlueprintCamelContext.java:137) [bundlefile:2.11.2] at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107) [org.eclipse.org.eclipse.osgi-3.8.0.v20120529-1548.jar:na] at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861) [org.eclipse.org.eclipse.osgi-3.8.0.v20120529-1548.jar:na] at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) [org.eclipse.org.eclipse.osgi-3.8.0.v20120529-1548.jar:na] at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) [org.eclipse.org.eclipse.osgi-3.8.0.v20120529-1548.jar:na] at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819) [org.eclipse.org.eclipse.osgi-3.8.0.v20120529-1548.jar:na] at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771) [org.eclipse.org.eclipse.osgi-3.8.0.v20120529-1548.jar:na] at
