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From Hiranya Jayathilaka <hiranya...@gmail.com>
Subject Removing XML APIs Library
Date Wed, 21 Dec 2011 15:53:02 GMT
Hi Folks,

This is with regard to https://issues.apache.org/jira/browse/SYNAPSE-410. I
have upgraded the XML APIs library version to 2.0.2. Andreas pointed out
that we don't really have to ship this library at all since we are on JDK
5. It seems having this library around can actually break stuff. I got the
following exception from neethi while trying some throttling stuff:

2011-12-21 21:08:58,636 [-] [HttpServerWorker-1] ERROR NativeWorkerPool
Uncaught exception
java.lang.NoSuchMethodError:
org.w3c.dom.Element.getTextContent()Ljava/lang/String;
at
org.apache.neethi.builders.xml.XMLPrimitiveAssertionBuilder.newPrimitiveAssertion(XMLPrimitiveAssertionBuilder.java:85)
at
org.apache.neethi.builders.xml.XMLPrimitiveAssertionBuilder.build(XMLPrimitiveAssertionBuilder.java:70)
at
org.apache.neethi.builders.xml.XMLPrimitiveAssertionBuilder.build(XMLPrimitiveAssertionBuilder.java:40)
at
org.apache.neethi.AssertionBuilderFactoryImpl.invokeBuilder(AssertionBuilderFactoryImpl.java:129)
at
org.apache.neethi.AssertionBuilderFactoryImpl.build(AssertionBuilderFactoryImpl.java:110)
at
org.apache.neethi.PolicyBuilder.processOperationElement(PolicyBuilder.java:220)
at org.apache.neethi.PolicyBuilder.getPolicyOperator(PolicyBuilder.java:172)
at org.apache.neethi.PolicyBuilder.getPolicy(PolicyBuilder.java:125)
at org.apache.neethi.PolicyEngine.getPolicy(PolicyEngine.java:113)
at
org.wso2.throttle.ThrottleFactory.createThrottle(ThrottleFactory.java:134)
at
org.wso2.throttle.ThrottleFactory.createMediatorThrottle(ThrottleFactory.java:88)
at
org.apache.synapse.mediators.throttle.ThrottleMediator.mediate(ThrottleMediator.java:152)
at
org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:60)
at
org.apache.synapse.mediators.filters.InMediator.mediate(InMediator.java:55)
at
org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:60)
at
org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:114)
at
org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:188)
at
org.apache.synapse.core.axis2.SynapseMessageReceiver.receive(SynapseMessageReceiver.java:83)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:181)
at
org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:176)
at
org.apache.synapse.transport.nhttp.ServerWorker.processEntityEnclosingMethod(ServerWorker.java:454)
at
org.apache.synapse.transport.nhttp.ServerWorker.run(ServerWorker.java:280)
at
org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:173)

The getTextContent method was not available in the old DOM API. When I
removed the xml-apis library from Synapse, it started to use the one
provided by JDK and things worked as expected. So looks like we have to get
rid of this. Does anybody see any issues with removing this?

Andreas, is it really safe to remove this? Will there be issues on other
JDKs (eg: IBM JDK)?

Thanks
-- 
Hiranya Jayathilaka
Associate Technical Lead;
WSO2 Inc.;  http://wso2.org
E-mail: hiranya@wso2.com;  Mobile: +94 77 633 3491
Blog: http://techfeast-hiranya.blogspot.com

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