001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.activemq.broker.view;
018
019import java.io.FileWriter;
020import java.io.PrintWriter;
021
022import org.apache.activemq.broker.Broker;
023import org.apache.activemq.broker.BrokerFilter;
024import org.slf4j.Logger;
025import org.slf4j.LoggerFactory;
026
027/**
028 * Useful base class
029 * 
030 * 
031 */
032public abstract class DotFileInterceptorSupport extends BrokerFilter {
033    private final Logger log = LoggerFactory.getLogger(DotFileInterceptorSupport.class);
034
035    private String file;
036
037    public DotFileInterceptorSupport(Broker next, String file) {
038        super(next);
039        this.file = file;
040    }
041
042    protected void generateFile() throws Exception {
043        log.debug("Creating DOT file at: {}", file);
044        PrintWriter writer = new PrintWriter(new FileWriter(file));
045        try {
046            generateFile(writer);
047        } finally {
048            writer.close();
049        }
050    }
051
052    protected abstract void generateFile(PrintWriter writer) throws Exception;
053}