I have been having some problems getting HiveMind 1.0 to work inside
of OC4J 9.0.4
I have a very simple session bean that creats a default registry with
RegistryBuilder
Registry r = RegistryBuilder.constructDefaultRegistry();
With Log4J set to DEBUG mode I get the following output
0 [RMICallHandler-6] DEBUG org.apache.hivemind.impl.RegistryBuilder
- Processing modules visible to
[EMAIL PROTECTED]
16 [RMICallHandler-6] DEBUG
org.apache.hivemind.parse.DescriptorParser - Parsing
jndi:C:\java-lib\hivemind-1.0\hivemind-1.0.jar/META-INF/hivemodule.xml
47 [RMICallHandler-6] ERROR org.apache.hivemind.impl.RegistryBuilder
- Error: null
java.lang.NullPointerException
at
org.apache.hivemind.parse.AbstractParser.getLocation(AbstractParser.java:158)
at
org.apache.hivemind.parse.DescriptorParser.parse(DescriptorParser.java:1420)
at
org.apache.hivemind.impl.RegistryBuilder.processModule(RegistryBuilder.java:216)
at
org.apache.hivemind.impl.RegistryBuilder.processModulesResources(RegistryBuilder.java:199)
at
org.apache.hivemind.impl.RegistryBuilder.processModules(RegistryBuilder.java:172)
at
org.apache.hivemind.impl.RegistryBuilder.constructDefaultRegistry(RegistryBuilder.java:709)
at org.act.hivemind.test.SessionEJBBean.test(SessionEJBBean.java:31)
at
SessionEJB_StatelessSessionBeanWrapper0.test(SessionEJB_StatelessSessionBeanWrapper0.java:96)
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:324)
at com.evermind.server.rmi.RMICallHandler.run(RMICallHandler.java:124)
at com.evermind.server.rmi.RMICallHandler.run(RMICallHandler.java:48)
at
com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186)
at java.lang.Thread.run(Thread.java:534)
63 [RMICallHandler-6] DEBUG
org.apache.hivemind.parse.DescriptorParser - Parsing
jndi:C:\java-lib\hivemind-1.0\hivemind-lib-1.0.jar/META-INF/hivemodule.xml
63 [RMICallHandler-6] ERROR org.apache.hivemind.impl.RegistryBuilder
- Error: null
java.lang.NullPointerException
at
org.apache.hivemind.parse.AbstractParser.getLocation(AbstractParser.java:158)
at
org.apache.hivemind.parse.DescriptorParser.parse(DescriptorParser.java:1420)
at
org.apache.hivemind.impl.RegistryBuilder.processModule(RegistryBuilder.java:216)
at
org.apache.hivemind.impl.RegistryBuilder.processModulesResources(RegistryBuilder.java:199)
at
org.apache.hivemind.impl.RegistryBuilder.processModules(RegistryBuilder.java:172)
at
org.apache.hivemind.impl.RegistryBuilder.constructDefaultRegistry(RegistryBuilder.java:709)
at org.act.hivemind.test.SessionEJBBean.test(SessionEJBBean.java:31)
at
SessionEJB_StatelessSessionBeanWrapper0.test(SessionEJB_StatelessSessionBeanWrapper0.java:96)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.evermind.server.rmi.RMICallHandler.run(RMICallHandler.java:124)
at com.evermind.server.rmi.RMICallHandler.run(RMICallHandler.java:48)
at
com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186)
at java.lang.Thread.run(Thread.java:534)
It appears that the DescriptorParser is having problems with the
"jndi:/" URLs. (It doesn't have any problems parsing hivemodule.xml
files that are not stored in a jar file, in that case they get a
file:/ URL)
I went and grabbed the lastest CVS code and built the project. It
still has the same problem.
I dove into DescriptorParser.java and tracked the problem to the
parseXML method. Currently it takes the ExternalForm value from the
resource's URL and uses it to create a SAX InputSource which i'm sure
tries to open an InputStream. I'm assuming that the InputSource is
having a problem with the jndi:/ style URL string. I went ahead and
modified parseXML to call openStream on the URL and pass that stream
directly into the InputSource.
/**
* Parses a document in the original format: unvalidated XML (with
no document type).
*/
private void parseXML(Resource resource) throws Exception
{
InputStream steam = null;
URL url = resource.getResourceURL();
if (url == null)
throw new
ApplicationRuntimeException(ParseMessages.missingResource(resource),
resource, null, null);
try
{
stream = url.openStream();
InputSource source = new InputSource(stream);
getSAXParser().parse(source, this);
}
catch (Exception ex)
{
_parser = null;
throw ex;
}
finally
{
try
{
if(stream != null) {
stream.close();
}
}
catch(Exception e) {}
}
}
built the project, it passed all the JUnit tests. Fired it up in
OC4J and now i'm not haveing any problems putting together a registry.
I think this solution should work in other App Servers as well.
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