/*
* Copyright 2002-2016 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.integration.file.tail;
import org.apache.commons.io.input.Tailer;
import org.apache.commons.io.input.TailerListener;
/**
* File tailer that delegates to the Apache Commons Tailer.
*
* @author Gary Russell
* @since 3.0
*
*/
public class ApacheCommonsFileTailingMessageProducer extends FileTailingMessageProducerSupport
implements TailerListener {
private volatile Tailer tailer;
private volatile long pollingDelay = 1000;
private volatile boolean end = true;
private volatile boolean reopen = false;
/**
* The delay between checks of the file for new content in milliseconds.
* @param pollingDelay The delay.
*/
public void setPollingDelay(long pollingDelay) {
this.pollingDelay = pollingDelay;
}
/**
* If true, tail from the end of the file, otherwise
* include all lines from the beginning. Default true.
* @param end true or false
*/
public void setEnd(boolean end) {
this.end = end;
}
/**
* If true, close and reopen the file between reading chunks;
* default false.
* @param reopen true or false.
*/
public void setReopen(boolean reopen) {
this.reopen = reopen;
}
@Override
public String getComponentType() {
return super.getComponentType() + " (Apache)";
}
@Override
protected void doStart() {
super.doStart();
Tailer tailer = new Tailer(this.getFile(), this, this.pollingDelay, this.end, this.reopen);
this.getTaskExecutor().execute(tailer);
this.tailer = tailer;
}
@Override
protected void doStop() {
super.doStop();
this.tailer.stop();
}
@Override
public void init(Tailer tailer) {
}
@Override
public void fileNotFound() {
this.publish("File not found: " + this.getFile().getAbsolutePath());
try {
Thread.sleep(this.getMissingFileDelay());
}
catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
@Override
public void fileRotated() {
this.publish("File rotated: " + this.getFile().getAbsolutePath());
}
@Override
public void handle(String line) {
send(line);
}
@Override
public void handle(Exception ex) {
this.publish(ex.getMessage());
}
}