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
015package org.apache.tapestry5.ioc.internal;
016
017import org.apache.tapestry5.ioc.Invokable;
018import org.apache.tapestry5.ioc.ObjectCreator;
019import org.apache.tapestry5.ioc.OperationTracker;
020
021/**
022 * Makes sure the operations tracker is notified knows that a service is being realized.
023 */
024public 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}