001 package org.apache.maven.eventspy.internal;
002
003 /*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements. See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership. The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License. You may obtain a copy of the License at
011 *
012 * http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied. See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022 import java.util.ArrayList;
023 import java.util.List;
024
025 import org.apache.maven.eventspy.EventSpy;
026 import org.apache.maven.execution.ExecutionListener;
027 import org.codehaus.plexus.component.annotations.Component;
028 import org.codehaus.plexus.component.annotations.Requirement;
029 import org.codehaus.plexus.logging.Logger;
030 import org.sonatype.aether.RepositoryListener;
031
032 /**
033 * Dispatches callbacks to all registered eventspies.
034 */
035 @Component( role = EventSpyDispatcher.class )
036 public class EventSpyDispatcher
037 {
038
039 @Requirement
040 private Logger logger;
041
042 @Requirement( role = EventSpy.class )
043 private List<EventSpy> eventSpies;
044
045 public void setEventSpies( List<EventSpy> eventSpies )
046 {
047 // make copy to get rid of needless overhead for dynamic lookups
048 this.eventSpies = new ArrayList<EventSpy>( eventSpies );
049 }
050
051 public List<EventSpy> getEventSpies()
052 {
053 return eventSpies;
054 }
055
056 public ExecutionListener chainListener( ExecutionListener listener )
057 {
058 if ( eventSpies.isEmpty() )
059 {
060 return listener;
061 }
062 return new EventSpyExecutionListener( this, listener );
063 }
064
065 public RepositoryListener chainListener( RepositoryListener listener )
066 {
067 if ( eventSpies.isEmpty() )
068 {
069 return listener;
070 }
071 return new EventSpyRepositoryListener( this, listener );
072 }
073
074 public void init( EventSpy.Context context )
075 {
076 if ( eventSpies.isEmpty() )
077 {
078 return;
079 }
080 for ( EventSpy eventSpy : eventSpies )
081 {
082 try
083 {
084 eventSpy.init( context );
085 }
086 catch ( Exception e )
087 {
088 logError( "initialize", e, eventSpy );
089 }
090 catch ( LinkageError e )
091 {
092 logError( "initialize", e, eventSpy );
093 }
094 }
095 }
096
097 public void onEvent( Object event )
098 {
099 if ( eventSpies.isEmpty() )
100 {
101 return;
102 }
103 for ( EventSpy eventSpy : eventSpies )
104 {
105 try
106 {
107 eventSpy.onEvent( event );
108 }
109 catch ( Exception e )
110 {
111 logError( "notify", e, eventSpy );
112 }
113 catch ( LinkageError e )
114 {
115 logError( "notify", e, eventSpy );
116 }
117 }
118 }
119
120 public void close()
121 {
122 if ( eventSpies.isEmpty() )
123 {
124 return;
125 }
126 for ( EventSpy eventSpy : eventSpies )
127 {
128 try
129 {
130 eventSpy.close();
131 }
132 catch ( Exception e )
133 {
134 logError( "close", e, eventSpy );
135 }
136 catch ( LinkageError e )
137 {
138 logError( "close", e, eventSpy );
139 }
140 }
141 }
142
143 private void logError( String action, Throwable e, EventSpy spy )
144 {
145 String msg = "Failed to " + action + " spy " + spy.getClass().getName() + ": " + e.getMessage();
146
147 if ( logger.isDebugEnabled() )
148 {
149 logger.warn( msg, e );
150 }
151 else
152 {
153 logger.warn( msg );
154 }
155 }
156
157 }