/*
* Copyright (c) 2007, 2009 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 org.hyperic.sigar.win32.EventLog;
import org.hyperic.sigar.win32.EventLogNotification;
import org.hyperic.sigar.win32.EventLogRecord;
import org.hyperic.sigar.win32.EventLogThread;
import org.hyperic.sigar.win32.Win32Exception;
public class EventLogTail {
private static void tail(String name, Tail tail) throws Win32Exception {
EventLog log = new EventLog();
log.open(name);
int max = log.getNumberOfRecords();
if (tail.number < max) {
max = tail.number;
}
int last = log.getNewestRecord()+1;
int first = last - max;
for (int i=first; i<last; i++) {
EventLogRecord record = log.read(i);
System.out.println(record);
}
log.close();
}
private static class TailNotification implements EventLogNotification {
public void handleNotification(EventLogRecord event) {
System.out.println(event);
}
public boolean matches(EventLogRecord event) {
return true;
}
}
public static void main(String[] args) throws Exception {
Tail tail = new Tail();
tail.parseArgs(args);
if (tail.files.size() == 0) {
tail.files.add(EventLog.SYSTEM);
}
for (int i=0; i<tail.files.size(); i++) {
String name = (String)tail.files.get(i);
tail(name, tail);
if (tail.follow) {
TailNotification notifier = new TailNotification();
EventLogThread thread =
EventLogThread.getInstance(name);
thread.add(notifier);
thread.doStart();
}
}
if (tail.follow) {
System.in.read();
}
}
}