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.commons.io.input;
018
019/**
020 * {@link TailerListener} Adapter.
021 *
022 * @since 2.0
023 */
024public class TailerListenerAdapter implements TailerListener {
025
026    /**
027     * Called each time the Tailer reaches the end of the file.
028     *
029     * <b>Note:</b> this is called from the tailer thread.
030     *
031     * Note: a future version of commons-io will pull this method up to the TailerListener interface,
032     * for now clients must subclass this class to use this feature.
033     *
034     * @since 2.5
035     */
036    public void endOfFileReached() {
037        // noop
038    }
039
040    /**
041     * This method is called if the tailed file is not found.
042     */
043    @Override
044    public void fileNotFound() {
045        // noop
046    }
047
048    /**
049     * Called if a file rotation is detected.
050     *
051     * This method is called before the file is reopened, and fileNotFound may
052     * be called if the new file has not yet been created.
053     */
054    @Override
055    public void fileRotated() {
056        // noop
057    }
058
059    /**
060     * Handles an Exception .
061     * @param ex the exception.
062     */
063    @Override
064    public void handle(final Exception ex) {
065        // noop
066    }
067
068    /**
069     * Handles a line from a Tailer.
070     * @param line the line.
071     */
072    @Override
073    public void handle(final String line) {
074        // noop
075    }
076
077    /**
078     * The tailer will call this method during construction,
079     * giving the listener a method of stopping the tailer.
080     * @param tailer the tailer.
081     */
082    @Override
083    public void init(final Tailer tailer) {
084        // noop
085    }
086}