/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.test.jmx.interceptors;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.lang.reflect.Method;
import javax.naming.Name;
import javax.naming.NameNotFoundException;
import javax.management.MBeanException;
import javax.management.ReflectionException;
import org.jboss.mx.interceptor.AbstractInterceptor;
import org.jboss.mx.interceptor.Interceptor;
import org.jboss.mx.server.Invocation;
import org.jboss.logging.Logger;
/** A simple file based persistence interceptor that saves the value of
* Naming.bind() calls as serialized objects.
*
* @author Scott.Stark@jboss.org
* @version $Revision: 81036 $
*/
public final class JNDIPersistence
extends AbstractInterceptor
{
private static Logger log = Logger.getLogger(JNDIPersistence.class);
private File storeDirectory;
public File getStoreDirectory()
{
return storeDirectory;
}
public void setStoreDirectory(File storeDirectory)
{
log.info("setStoreDirectory: "+storeDirectory);
if( storeDirectory.exists() == false )
storeDirectory.mkdir();
this.storeDirectory = storeDirectory;
}
// Interceptor overrides -----------------------------------------
public Object invoke(Invocation invocation) throws Throwable
{
String opName = invocation.getName();
log.info("invoke, opName="+opName);
// If this is not the invoke(Invocation) op just pass it along
if( opName == null || opName.equals("invoke") == false )
{
Interceptor i = invocation.nextInterceptor();
return i.invoke(invocation);
}
Object[] args = invocation.getArgs();
org.jboss.invocation.Invocation invokeInfo =
(org.jboss.invocation.Invocation) args[0];
Object[] iargs = invokeInfo.getArguments();
for(int a = 0; a < args.length; a ++)
log.info(" args["+a+"]="+iargs[a]);
Method method = invokeInfo.getMethod();
String methodName = method.getName();
log.info("methodName: "+methodName);
Object value = null;
if( methodName.equals("bind") )
{
log.info("Dispatching bind");
invocation.nextInterceptor().invoke(invocation);
// Bind succeeded, save the value
log.info("Saving bind data");
Name name = (Name) iargs[0];
Object data = iargs[1];
try
{
writeBinding(name, data);
}
catch(Throwable e)
{
log.error("Failed to write binding", e);
throw e;
}
}
else if( methodName.equals("lookup") )
{
log.info("Dispatching lookup");
try
{
value = invocation.nextInterceptor().invoke(invocation);
log.info("lookup returned: "+value);
}
catch(Throwable ex)
{
ex = getException(ex);
log.info("InvocationException: ", ex);
if( ex instanceof NameNotFoundException )
{
log.info("NameNotFoundException in lookup, finding data");
Name name = (Name) iargs[0];
try
{
value = readBinding(name);
if( value == null )
throw ex;
}
catch(Throwable e2)
{
log.error("Failed to read binding", e2);
throw e2;
}
}
}
}
else
{
value = invocation.nextInterceptor().invoke(invocation);
}
return value;
}
private void writeBinding(Name name, Object data)
throws IOException
{
File dataFile = new File(storeDirectory, name.toString());
FileOutputStream fos = new FileOutputStream(dataFile);
ObjectOutputStream oos = new ObjectOutputStream(fos);
oos.writeObject(data);
oos.close();
fos.close();
log.info("Wrote data binding to: "+dataFile);
}
private Object readBinding(Name name)
throws IOException, ClassNotFoundException
{
File dataFile = new File(storeDirectory, name.toString());
if( dataFile.exists() == false )
return null;
FileInputStream fis = new FileInputStream(dataFile);
ObjectInputStream ois = new ObjectInputStream(fis);
Object data = ois.readObject();
ois.close();
fis.close();
log.info("Read data binding from: "+dataFile);
return data;
}
/** Unwrap the InvocationException to see what the Naming service
* exception really was.
*
* @param ex the wrapped InvocationException
* @return the underlying initial exception
*/
Throwable getException(Throwable ex)
{
if( ex instanceof MBeanException )
{
MBeanException mbe = (MBeanException) ex;
ex = mbe.getTargetException();
}
else if( ex instanceof ReflectionException )
{
ReflectionException re = (ReflectionException) ex;
ex = re.getTargetException();
}
return ex;
}
}