/*******************************************************************************
*Copyright (c) 2009 Eucalyptus Systems, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, only version 3 of the License.
*
*
* This file 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 General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Please contact Eucalyptus Systems, Inc., 130 Castilian
* Dr., Goleta, CA 93101 USA or visit <http://www.eucalyptus.com/licenses/>
* if you need additional information or have any questions.
*
* This file may incorporate work covered under the following copyright and
* permission notice:
*
* Software License Agreement (BSD License)
*
* Copyright (c) 2008, Regents of the University of California
* All rights reserved.
*
* Redistribution and use of this software in source and binary forms, with
* or without modification, are permitted provided that the following
* conditions are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. USERS OF
* THIS SOFTWARE ACKNOWLEDGE THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE
* LICENSED MATERIAL, COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS
* SOFTWARE, AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
* IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA, SANTA
* BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY, WHICH IN
* THE REGENTS’ DISCRETION MAY INCLUDE, WITHOUT LIMITATION, REPLACEMENT
* OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO IDENTIFIED, OR
* WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT NEEDED TO COMPLY WITH
* ANY SUCH LICENSES OR RIGHTS.
*******************************************************************************/
/*
* Author: chris grzegorczyk <grze@eucalyptus.com>
*/
package com.eucalyptus.ws.util;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import org.apache.log4j.Logger;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.Channels;
import org.mule.api.MessagingException;
import org.mule.api.MuleMessage;
import org.mule.message.ExceptionMessage;
import com.eucalyptus.binding.BindingManager;
import com.eucalyptus.context.Context;
import com.eucalyptus.context.Contexts;
import com.eucalyptus.context.NoSuchContextException;
import com.eucalyptus.records.EventType;
import com.eucalyptus.util.LogUtil;
import edu.ucsb.eucalyptus.cloud.VmAllocationInfo;
import edu.ucsb.eucalyptus.msgs.BaseMessage;
import edu.ucsb.eucalyptus.msgs.EucalyptusErrorMessageType;
import com.eucalyptus.records.EventRecord;
public class ReplyQueue {
private static Logger LOG = Logger.getLogger( ReplyQueue.class );
public static void handle( String service, MuleMessage responseMessage, BaseMessage request ) {
BaseMessage reply = null;
if ( responseMessage.getExceptionPayload( ) == null ) {
reply = ( BaseMessage ) responseMessage.getPayload( );
} else {
Throwable t = responseMessage.getExceptionPayload( ).getException( );
t = ( t.getCause() == null ) ? t : t.getCause( );
reply = new EucalyptusErrorMessageType( service, request, t.getMessage( ) );
}
String corrId = reply.getCorrelationId( );
EventRecord.here( ReplyQueue.class, EventType.MSG_REPLY, reply.getCorrelationId( ), reply.getClass( ).getSimpleName( ) ).debug( );
try {
Context context = Contexts.lookup( corrId );
Channel channel = context.getChannel( );
Channels.write( channel, reply );
Contexts.clear(context);
} catch ( NoSuchContextException e ) {
LOG.trace( e, e );
}
}
@SuppressWarnings( "unchecked" )
public void handle( BaseMessage responseMessage ) {
EventRecord.here( ReplyQueue.class, EventType.MSG_REPLY, responseMessage.getCorrelationId( ), responseMessage.getClass( ).getSimpleName( ) ).debug( );
String corrId = responseMessage.getCorrelationId( );
try {
Context context = Contexts.lookup( corrId );
Channel channel = context.getChannel( );
Channels.write( channel, responseMessage );
Contexts.clear(context);
} catch ( NoSuchContextException e ) {
LOG.warn( "Received a reply for absent client: No channel to write response message.", e );
LOG.debug( responseMessage );
}
}
public void handle( ExceptionMessage exMsg ) {
EventRecord.here( ReplyQueue.class, EventType.MSG_REPLY, exMsg.getPayload( ).getClass( ).getSimpleName( ) ).debug( );
LOG.trace( "Caught exception while servicing: " + exMsg.getPayload( ) );
Throwable exception = exMsg.getException( );
Object payload = null;
BaseMessage msg = null;
if ( exception instanceof MessagingException ) {
MessagingException ex = ( MessagingException ) exception;
MuleMessage muleMsg = ex.getUmoMessage( );
if ( payload instanceof VmAllocationInfo ) {
msg = ( ( VmAllocationInfo ) payload ).getRequest( );
} else {
try {
msg = parsePayload( muleMsg.getPayload( ) );
} catch ( Exception e ) {
LOG.error( "Bailing out of error handling: don't have the correlationId for the caller!" );
LOG.error( e, e );
return;
}
}
EucalyptusErrorMessageType errMsg = getErrorMessageType( exMsg.getComponentName( ), exMsg.getException( ), msg );
errMsg.setException( exception.getCause( ) );
this.handle( errMsg );
}
}
private EucalyptusErrorMessageType getErrorMessageType( final String componentName, Throwable exception, final BaseMessage msg ) {
EucalyptusErrorMessageType errMsg = null;
if ( exception != null ) {
String desc = "";
LOG.error( exception, exception );
exception = exception.getCause( ) != null ? exception.getCause( ) : exception;
for( Throwable e = exception; e != null; e = e.getCause( ) ) {
desc += "\n" + e.getMessage( );
}
errMsg = new EucalyptusErrorMessageType( componentName, msg, desc );
} else {
ByteArrayOutputStream exStream = new ByteArrayOutputStream( );
if(exception != null)
exception.printStackTrace( new PrintStream( exStream ) );
errMsg = new EucalyptusErrorMessageType( componentName, msg, "Internal Error: " + exStream.toString( ) );
}
return errMsg;
}
private BaseMessage parsePayload( Object payload ) throws Exception {
if ( payload instanceof BaseMessage ) {
return ( BaseMessage ) payload;
} else if ( payload instanceof VmAllocationInfo ) {
return ( ( VmAllocationInfo ) payload ).getRequest( );
} else if ( !( payload instanceof String ) ) {
return new EucalyptusErrorMessageType( "ReplyQueue", LogUtil.dumpObject( payload ) );
} else {
return ( BaseMessage ) BindingManager.getBinding( "msgs_eucalyptus_com" ).fromOM( ( String ) payload );
}
}
}