| /* |
| * 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.catalina.ha.backend; |
| |
| import java.io.UnsupportedEncodingException; |
| import java.net.DatagramPacket; |
| import java.net.InetAddress; |
| import java.net.InetSocketAddress; |
| import java.net.MulticastSocket; |
| |
| import org.apache.juli.logging.Log; |
| import org.apache.juli.logging.LogFactory; |
| |
| /* |
| * Sender to proxies using multicast socket. |
| */ |
| public class MultiCastSender |
| implements Sender { |
| |
| private static final Log log = LogFactory.getLog(HeartbeatListener.class); |
| |
| HeartbeatListener config = null; |
| |
| /* for multicasting stuff */ |
| MulticastSocket s = null; |
| InetAddress group = null; |
| |
| @Override |
| public void init(HeartbeatListener config) throws Exception { |
| this.config = config; |
| } |
| |
| @Override |
| public int send(String mess) throws Exception { |
| if (s == null) { |
| try { |
| group = InetAddress.getByName(config.getGroup()); |
| if (config.host != null) { |
| InetAddress addr = InetAddress.getByName(config.host); |
| InetSocketAddress addrs = new InetSocketAddress(addr, config.getMultiport()); |
| s = new MulticastSocket(addrs); |
| } else |
| s = new MulticastSocket(config.getMultiport()); |
| |
| s.setTimeToLive(config.getTtl()); |
| s.joinGroup(group); |
| } catch (Exception ex) { |
| log.error("Unable to use multicast: " + ex); |
| s = null; |
| return -1; |
| } |
| } |
| |
| byte[] buf; |
| try { |
| buf = mess.getBytes("US-ASCII"); |
| } catch (UnsupportedEncodingException ex) { |
| buf = mess.getBytes(); |
| } |
| DatagramPacket data = new DatagramPacket(buf, buf.length, group, config.getMultiport()); |
| try { |
| s.send(data); |
| } catch (Exception ex) { |
| log.error("Unable to send colllected load information: " + ex); |
| s.close(); |
| s = null; |
| return -1; |
| } |
| return 0; |
| } |
| |
| } |