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    import java.net.URL;
022    
023    /**
024     * Adapts connection events to logging messages.
025     *
026     * <p>
027     *   The NetworkMonitor must be thread safe.
028     * </p>
029     *
030     * @author <a href="http://www.dpml.net">Digital Product Meta Library</a>
031     * @version 1.0.3
032     * @see net.dpml.transit.monitor.Monitor
033     */
034    public class ConnectionMonitorAdapter extends AbstractAdapter
035        implements ConnectionMonitor
036    {
037        // ------------------------------------------------------------------------
038        // constructor
039        // ------------------------------------------------------------------------
040    
041       /**
042        * Creation of a new adaptive connection monitor.
043        * @param adapter the adapter to assign to the monitor
044        */
045        public ConnectionMonitorAdapter( Adapter adapter )
046        {
047            super( adapter );
048        }
049    
050        // ------------------------------------------------------------------------
051        // ConnectionMonitor
052        // ------------------------------------------------------------------------
053    
054       /**
055        * Notify the monitor that a connection was opened.
056        * @param url the url on which the open connection was issued
057        */
058        public void connectionOpened( URL url )
059        {
060            if( getAdapter().isDebugEnabled() )
061            {
062                getAdapter().debug( "opened connection: " + url );
063            }
064        }
065    
066       /**
067        * Notify the monitor that a connection was started.
068        * @param url the target connection
069        */
070        public void connectStarted( URL url )
071        {
072        }
073    
074       /**
075        * Notify the monitor that a connection was completed.
076        * @param url the target connection
077        */
078        public void connectCompleted( URL url )
079        {
080            if( getAdapter().isDebugEnabled() )
081            {
082                getAdapter().debug( "closed connection: " + url );
083            }
084        }
085    }