001    //  Copyright 2008,, 2009 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.ioc.internal;
016    
017    import org.apache.tapestry5.ioc.Invokable;
018    import org.apache.tapestry5.ioc.ObjectCreator;
019    import org.apache.tapestry5.ioc.OperationTracker;
020    
021    /**
022     * Makes sure the operations tracker is notified knows that a service is being realized.
023     */
024    public class OperationTrackingObjectCreator implements ObjectCreator
025    {
026        private final OperationTracker tracker;
027    
028        private final String message;
029    
030        private final ObjectCreator delegate;
031    
032        public OperationTrackingObjectCreator(OperationTracker tracker, String message, ObjectCreator delegate)
033        {
034            this.tracker = tracker;
035            this.message = message;
036            this.delegate = delegate;
037        }
038    
039        public Object createObject()
040        {
041            Invokable<Object> operation = new Invokable<Object>()
042            {
043                public Object invoke()
044                {
045                    return delegate.createObject();
046                }
047            };
048    
049            return tracker.invoke(message, operation);
050        }
051    }