/*************************************************************************
* 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.bootstrap;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.List;
import org.apache.log4j.Logger;
import com.eucalyptus.records.EventRecord;
import com.eucalyptus.records.EventType;
import com.eucalyptus.system.Ats;
import com.google.common.collect.Lists;
public class BootstrapperDiscovery extends ServiceJarDiscovery {
private static Logger LOG = Logger.getLogger( BootstrapperDiscovery.class );
private static List<Class> bootstrappers = Lists.newArrayList( );
public BootstrapperDiscovery() {}
/**
* Find
* @see com.eucalyptus.bootstrap.ServiceJarDiscovery#processClass(java.lang.Class)
* @param candidate
* @return
* @throws Exception
*/
@Override
public boolean processClass( Class candidate ) throws Exception {
String bc = candidate.getCanonicalName( );
if ( Modifier.isAbstract( candidate.getModifiers( ) ) ||
!Bootstrapper.class.isAssignableFrom( candidate ) ) {
return false;
}
Class bootstrapper = this.getBootstrapper( candidate );
if ( !Ats.from( candidate ).has( RunDuring.class ) ) {
throw BootstrapException.throwFatal( "Bootstrap class does not specify execution stage (RunDuring.value=Bootstrap.Stage): " + bc );
} else if ( !Ats.from( candidate ).has( Provides.class ) ) {
throw BootstrapException.throwFatal( "Bootstrap class does not specify provided component (Provides.value=Component): " + bc );
}
this.bootstrappers.add( bootstrapper );
return true;
}
@SuppressWarnings( "unchecked" )
public static List<Bootstrapper> getBootstrappers( ) {
List<Bootstrapper> ret = Lists.newArrayList( );
for ( Class c : bootstrappers ) {
if ( c.equals( SystemBootstrapper.class ) ) continue;
try {
EventRecord.here( BootstrapperDiscovery.class, EventType.BOOTSTRAPPER_INIT,"<init>()V", c.getCanonicalName( ) ).info( );
try {
ret.add( ( Bootstrapper ) c.newInstance( ) );
} catch ( Exception e ) {
EventRecord.here( BootstrapperDiscovery.class, EventType.BOOTSTRAPPER_INIT,"getInstance()L", c.getCanonicalName( ) ).info( );
try {
Method m = c.getDeclaredMethod( "getInstance", new Class[] {} );
ret.add( ( Bootstrapper ) m.invoke( null, new Object[] {} ) );
} catch ( NoSuchMethodException ex ) {
throw BootstrapException.throwFatal( "Error in <init>()V in bootstrapper: " + c.getCanonicalName( ), e );
}
}
} catch ( Exception e ) {
throw BootstrapException.throwFatal( "Error in <init>()V and getInstance()L; in bootstrapper: " + c.getCanonicalName( ), e );
}
}
return ret;
}
@SuppressWarnings( "unchecked" )
private Class getBootstrapper( Class candidate ) throws Exception {
LOG.trace( "Candidate bootstrapper: " + candidate.getName( ) );
if ( !Modifier.isPublic( candidate.getDeclaredConstructor( new Class[] {} ).getModifiers( ) ) ) {
Method factory = candidate.getDeclaredMethod( "getInstance", new Class[] {} );
if ( !Modifier.isStatic( factory.getModifiers( ) ) || !Modifier.isPublic( factory.getModifiers( ) ) ) {
throw BootstrapException.throwFatal( candidate.getCanonicalName( ) + " does not declare public <init>()V or public static getInstance()L;" );
}
}
EventRecord.here( ServiceJarDiscovery.class, EventType.BOOTSTRAPPER_ADDED, candidate.getName() ).info( );
return candidate;
}
@Override
public Double getPriority( ) {
return 0.0d;
}
}