/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.geronimo.farm.plugin;
import org.apache.geronimo.gbean.annotation.GBean;
import org.apache.geronimo.gbean.annotation.ParamReference;
import org.apache.geronimo.farm.discovery.MulticastLocation;
import org.apache.geronimo.farm.discovery.MulticastSearch;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
import java.util.concurrent.atomic.AtomicBoolean;
import java.net.URI;
@GBean
public class HeartbeatMonitor implements org.apache.geronimo.system.plugin.HeartbeatMonitor {
private final MulticastLocation location;
public HeartbeatMonitor(@ParamReference(name = "MulticastLocation") MulticastLocation location) {
this.location = location;
}
public void monitor(final InputStream in, final OutputStream output, String pattern) {
if (pattern == null || pattern.equals("")) pattern = ".*";
final PrintStream out = new PrintStream(output);
final Pattern regex;
try {
regex = Pattern.compile(pattern);
} catch (Exception e) {
out.println("Invalid java.util.regex.Pattern \"" + pattern + "\"");
return;
}
out.println("Hit any key to stop.");
final AtomicBoolean stop = new AtomicBoolean();
Runnable runnable = new Runnable(){
public void run() {
try {
in.read();
} catch (IOException e) {
} finally {
stop.set(true);
}
}
};
Thread thread = new Thread(runnable);
thread.setDaemon(true);
thread.start();
try {
MulticastSearch multicast = new MulticastSearch(location.getHost(), location.getPort());
multicast.search(new MulticastSearch.Filter(){
public boolean accept(URI service) {
String s = service.toString();
Matcher matcher = regex.matcher(s);
if (matcher.matches()){
out.println(s);
}
return stop.get();
}
});
} catch (IOException e) {
e.printStackTrace(out);
}
}
}