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    
015    package org.apache.tapestry.engine;
016    
017    import 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     */
029    public 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    }