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.commons.ObjectCreator;
018import org.apache.tapestry5.ioc.Invokable;
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    @Override
040    public Object createObject()
041    {
042        Invokable<Object> operation = new Invokable<Object>()
043        {
044            @Override
045            public Object invoke()
046            {
047                return delegate.createObject();
048            }
049        };
050
051        return tracker.invoke(message, operation);
052    }
053}