/*************************************************************************
* Copyright 2009-2012 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; version 3 of the License.
*
* This program 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., 6755 Hollister Ave., Goleta
* CA 93117, 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.
************************************************************************/
package com.eucalyptus.ws.server;
import org.apache.log4j.Logger;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.ChannelFuture;
import org.jboss.netty.channel.ChannelFutureListener;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.channel.ChannelPipeline;
import org.jboss.netty.channel.ExceptionEvent;
import org.jboss.netty.channel.MessageEvent;
import org.jboss.netty.channel.SimpleChannelHandler;
import org.jboss.netty.handler.codec.http.DefaultHttpResponse;
import org.jboss.netty.handler.codec.http.HttpHeaders;
import org.jboss.netty.handler.codec.http.HttpMethod;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponse;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import com.eucalyptus.component.Component;
import com.eucalyptus.component.Components;
import com.eucalyptus.component.Topology;
import com.eucalyptus.component.annotation.ComponentPart;
import com.eucalyptus.context.Contexts;
import com.eucalyptus.empyrean.Empyrean;
import com.eucalyptus.http.MappingHttpRequest;
import com.google.common.base.Charsets;
@ComponentPart( Empyrean.class )
public class LegacyHBPipeline extends FilteredPipeline {
private static Logger LOG = Logger.getLogger( LegacyHBPipeline.class );
@Override
public boolean checkAccepts( HttpRequest message ) {
return message.getUri( ).endsWith( "/services/Heartbeat" );
}
@Override
public String getName( ) {
return "heartbeat";
}
@Override
public ChannelPipeline addHandlers( ChannelPipeline pipeline ) {
pipeline.addLast( "hb-get-handler", new SimpleHeartbeatHandler( ) );
return pipeline;
}
public static class SimpleHeartbeatHandler extends SimpleChannelHandler {
@Override
public void messageReceived( ChannelHandlerContext ctx, MessageEvent e ) throws Exception {
if ( e.getMessage( ) instanceof MappingHttpRequest ) {
MappingHttpRequest request = ( MappingHttpRequest ) e.getMessage( );
HttpMethod method = request.getMethod( );
if ( HttpMethod.GET.equals( method ) ) {
try {
HttpResponse response = new DefaultHttpResponse( request.getProtocolVersion( ), HttpResponseStatus.OK );
String resp = "";
for ( Component c : Components.list( ) ) {
boolean enabledLocally = Topology.isEnabledLocally( c.getComponentId( ).getClass( ) );
resp += String.format( "name=%-20.20s enabled=%-10.10s local=%-10.10s initialized=%-10.10s\n",
c.getName( ),
enabledLocally,
c.hasLocalService( ),
c.getComponentId( ).isAvailableLocally( ) );
}
ChannelBuffer buf = ChannelBuffers.wrappedBuffer(resp.getBytes(Charsets.UTF_8));
response.setContent( buf );
response.addHeader( HttpHeaders.Names.CONTENT_LENGTH, String.valueOf( buf.readableBytes( ) ) );
response.addHeader( HttpHeaders.Names.CONTENT_TYPE, "text/plain; charset=UTF-8" );
ChannelFuture writeFuture = ctx.getChannel( ).write( response );
writeFuture.addListener( ChannelFutureListener.CLOSE );
} finally {
Contexts.clear( request.getCorrelationId( ) );
}
} else {
try {
ctx.getChannel( ).write( new DefaultHttpResponse( request.getProtocolVersion( ), HttpResponseStatus.METHOD_NOT_ALLOWED ) ).addListener( ChannelFutureListener.CLOSE );
} finally {
Contexts.clear( request.getCorrelationId( ) );
}
}
} else {
ctx.sendUpstream( e );
}
}
@Override
public void exceptionCaught( ChannelHandlerContext ctx, ExceptionEvent e ) throws Exception {
e.getFuture( ).addListener( ChannelFutureListener.CLOSE );
super.exceptionCaught( ctx, e );
}
}
}