/*
* Copyright (c) 2006-2007 Hyperic, Inc.
*
* 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.hyperic.sigar.cmd;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.Reader;
import java.util.ArrayList;
import java.util.List;
import org.hyperic.sigar.Sigar;
import org.hyperic.sigar.SigarException;
import org.hyperic.sigar.FileInfo;
import org.hyperic.sigar.FileTail;
import org.hyperic.sigar.FileWatcherThread;
/**
* Display the last part of files to the standard output.
*/
public class Tail {
public boolean follow;
public int number = 10;
public List files = new ArrayList();
public void parseArgs(String args[]) throws SigarException {
for (int i=0; i<args.length; i++) {
String arg = args[i];
if (arg.charAt(0) != '-') {
this.files.add(arg);
continue;
}
arg = arg.substring(1);
if (arg.equals("f")) {
this.follow = true;
}
else if (Character.isDigit(arg.charAt(0))) {
this.number = Integer.parseInt(arg);
}
else {
throw new SigarException("Unknown argument: " + args[i]);
}
}
}
public static void main(String[] args) throws SigarException {
Sigar sigar = new Sigar();
FileWatcherThread watcherThread =
FileWatcherThread.getInstance();
watcherThread.doStart();
watcherThread.setInterval(1000);
FileTail watcher =
new FileTail(sigar) {
public void tail(FileInfo info, Reader reader) {
String line;
BufferedReader buffer =
new BufferedReader(reader);
if (getFiles().size() > 1) {
System.out.println("==> " +
info.getName() +
" <==");
}
try {
while ((line = buffer.readLine()) != null) {
System.out.println(line);
}
} catch (IOException e) {
System.out.println(e);
}
}
};
for (int i=0; i<args.length; i++) {
watcher.add(args[i]);
}
watcherThread.add(watcher);
try {
System.in.read();
} catch (IOException e) { }
watcherThread.doStop();
}
}