001// Copyright 2004, 2005 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.tapestry.engine;
016
017import org.apache.tapestry.web.WebRequest;
018
019/**
020 * Interface for an object that can create a {@link IMonitor} instance for a particular
021 * {@link org.apache.tapestry.request.RequestContext}. The engine expects there to be a monitor
022 * factory as application extension <code>org.apache.tapestry.monitor-factory</code>. If no such
023 * extension exists, then {@link org.apache.tapestry.engine.DefaultMonitorFactory}is used instead.
024 * 
025 * @author Howard Lewis Ship
026 * @since 3.0
027 * @deprecated To be removed in 4.1 with no direct replacement.
028 */
029public interface IMonitorFactory
030{
031    /**
032     * Create a new {@link IMonitor}instance. Alternately, return a shared instance. This method
033     * may be invoked by multiple threads.
034     */
035
036    public IMonitor createMonitor(WebRequest request);
037}