001    /* 
002     * Copyright 2004 Niclas Hedhman.
003     *
004     * Licensed  under the  Apache License,  Version 2.0  (the "License");
005     * you may not use  this file  except in  compliance with the License.
006     * You may obtain a copy of the License at 
007     * 
008     *   http://www.apache.org/licenses/LICENSE-2.0
009     * 
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed  under the  License is distributed on an "AS IS" BASIS,
012     * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY KIND, either  express  or
013     * implied.
014     * 
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package net.dpml.transit.monitor;
020    
021    /**
022     * Genric interface marking a class as a monitor.
023     *
024     * @author <a href="http://www.dpml.net">Digital Product Meta Library</a>
025     * @version 1.0.1
026     */ 
027    public interface Monitor
028    {
029       /**
030        * Immutable key used to lookup the a system property containing the value
031        * of a debug trace policy.
032        */
033        final String BOOTSTRAP_DEBUG_KEY = "dpml.transit.debug";
034    }
035