8 Replies Latest reply on Jun 22, 2005 11:30 AM by dbufarini

Help: I need code examples for TreeCache

dbufarini Jun 22, 2005 8:17 AM

Hi,
I'm new to TreeCache and I'm trying to use it inside a session bean running in JBoss. I'm searching for code examples of how to locate the TreeCache mbean (I suppose through jndi...) and how to cast the result.
Does someone can help me?
Thanks!

Daniele

1. Re: Help: I need code examples for TreeCache

belaban Jun 22, 2005 9:26 AM (in response to dbufarini)

http://docs.jboss.com/jbcache/current/TreeCache/html/

chapter 11
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2. Re: Help: I need code examples for TreeCache

dbufarini Jun 22, 2005 9:49 AM (in response to dbufarini)

Thanks, but... I've already read that chapter and the code shown can be used only inside a servlet.
Does that work even inside a session ejb?
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3. Re: Help: I need code examples for TreeCache

belaban Jun 22, 2005 10:46 AM (in response to dbufarini)

It works inside the same VM. If you want remote access, read on (ch 11) for how to do this.
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4. Re: Help: I need code examples for TreeCache

dbufarini Jun 22, 2005 10:55 AM (in response to dbufarini)

I read all the chapter 11, but there is only an example of an xml configuration file and NO code example.
I still don't know how to look for the mbean (even if I can resonably suppose that I can through JNDI) and, more important, I don't know which interface I have to use to cast the reference returned by PortableRemoteObject.narrow().
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5. Re: Help: I need code examples for TreeCache

belaban Jun 22, 2005 11:16 AM (in response to dbufarini)

It is there:

http://docs.jboss.com/jbcache/current/TreeCache/html/

Go to chapter 11, here is the code:

 <mbean
 code="org.jboss.invocation.jrmp.server.JRMPProxyFactory"
 name="mydomain:service=proxyFactory,type=jrmp,target=factory">
 <attribute
 name="InvokerName">jboss:service=invoker,type=jrmp</attribute>
 <attribute
 name="TargetName">jboss.cache:service=TreeCache</attribute>
 <attribute name="JndiName">MyCache</attribute> <attribute
 name="InvokeTargetMethod">true</attribute> <attribute
 name="ExportedInterface">org.jboss.cache.TreeCacheMBean</attribute>
 <attribute name="ClientInterceptors"> <iterceptors>
 <interceptor>org.jboss.proxy.ClientMethodInterceptor</interceptor>
 <interceptor>org.jboss.proxy.SecurityInterceptor</interceptor>
 <interceptor>org.jboss.invocation.InvokerInterceptor</interceptor>
 </iterceptors> </attribute>
 <depends>jboss:service=invoker,type=jrmp</depends>
 <depends>jboss.cache:service=TreeCache</depends>
 </mbean>

The JNDI name is MyCache

6. Re: Help: I need code examples for TreeCache

belaban Jun 22, 2005 11:18 AM (in response to dbufarini)

You cast it to TreeCacheMBean
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7. Re: Help: I need code examples for TreeCache

dbufarini Jun 22, 2005 11:19 AM (in response to dbufarini)

Hi again,
I've tried with the following code:

final Context ctx = new InitialContext();
final Object ref = ctx.lookup( "MyCache" );
ctx.close();
cache_ = (TreeCache)
javax.rmi.PortableRemoteObject.narrow( ref, TreeCache.class );

Is that code correct?
I've then tried to call a get() method, but Eclipse incremental compiler complaint that
"The type org.jboss.system.ServiceMBeanSupport cannot be resolved. It is indirectly referenced from required .class files"

The code used is something like this:

cache_.put( "/global/ejb", key, value );

Thanks!
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8. Re: Help: I need code examples for TreeCache

dbufarini Jun 22, 2005 11:30 AM (in response to dbufarini)

Ok, I've missed some jar inside the Eclipse ide.
Thanks for all!
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