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/*******************************************************************************
*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.util.ArrayList;
import java.util.List;
import org.apache.log4j.Logger;
import org.jboss.netty.handler.codec.http.HttpRequest;
import com.eucalyptus.util.DebugUtil;
import com.eucalyptus.ws.server.DuplicatePipelineException;
import com.eucalyptus.ws.server.FilteredPipeline;
import com.eucalyptus.ws.server.NoAcceptingPipelineException;
import edu.ucsb.eucalyptus.constants.EventType;
import edu.ucsb.eucalyptus.msgs.EventRecord;
public class PipelineRegistry {
private static PipelineRegistry registry;
private static Logger LOG = Logger.getLogger( PipelineRegistry.class );
public static PipelineRegistry getInstance( ) {
synchronized ( PipelineRegistry.class ) {
if ( PipelineRegistry.registry == null ) {
PipelineRegistry.registry = new PipelineRegistry( );
}
}
return PipelineRegistry.registry;
}
private final List<FilteredPipeline> pipelines = new ArrayList<FilteredPipeline>( );
public void register( final FilteredPipeline pipeline ) {
LOG.info( "-> Registering pipeline: " + pipeline.getPipelineName( ) );
this.pipelines.add( pipeline );
}
public FilteredPipeline find( final HttpRequest request ) throws DuplicatePipelineException, NoAcceptingPipelineException {
FilteredPipeline candidate = null;
for ( FilteredPipeline f : this.pipelines) {
if ( f.accepts( request ) ) {
if( !DebugUtil.DEBUG ) {
return f;
} else if ( candidate != null ) {
LOG.debug( EventRecord.here( this.getClass(), EventType.PIPELINE_DUPLICATE, f.getPipelineName( ), f.getClass( ).getSimpleName( ) ) );
} else {
candidate = f;
}
}
}
if ( candidate == null ) { throw new NoAcceptingPipelineException( ); }
return candidate;
}
}
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