| /* |
| * 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.geode.distributed.internal.membership.gms.messenger; |
| |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| import org.jgroups.Event; |
| import org.jgroups.Message; |
| import org.jgroups.conf.ClassConfigurator; |
| import org.jgroups.protocols.UNICAST3; |
| import org.jgroups.protocols.pbcast.NAKACK2; |
| import org.jgroups.stack.Protocol; |
| import org.jgroups.util.UUID; |
| |
| /** |
| * InterceptUDP replaces the regular UDP JGroups messaging protocol for unit testing. It does not |
| * create a datagram socket and is only set up to record message counts and respond to Unicast to |
| * keep it from retransmitting |
| */ |
| public class InterceptUDP extends Protocol { |
| |
| static final int MEMBERSHIP_PORT = 12345; |
| |
| private final short nakackHeaderId = ClassConfigurator.getProtocolId(NAKACK2.class); |
| private final short unicastHeaderId = ClassConfigurator.getProtocolId(UNICAST3.class); |
| |
| UUID uuid; |
| // IpAddress addr; |
| // Map<UUID, IpAddress> addressMap; |
| int unicastSentDataMessages; |
| int mcastSentDataMessages; |
| |
| boolean collectMessages = false; |
| List<Message> collectedMessages = new LinkedList<>(); |
| |
| public InterceptUDP() { |
| // uuid = new UUID(); |
| // try { |
| // addr = new IpAddress("localhost", MEMBERSHIP_PORT); |
| // } catch (UnknownHostException e) { |
| // throw new RuntimeException("unexpected exception", e); |
| // } |
| // addressMap = new HashMap<>(); |
| // addressMap.put(uuid, addr); |
| } |
| |
| @Override |
| public Object up(Event evt) { |
| return up_prot.up(evt); |
| } |
| |
| @Override |
| public Object down(Event evt) { |
| switch (evt.getType()) { |
| case Event.MSG: |
| handleMessage((Message) evt.getArg()); |
| return null; |
| case Event.SET_LOCAL_ADDRESS: |
| uuid = (UUID) evt.getArg(); |
| break; |
| } |
| return down_prot.down(evt); |
| } |
| |
| private void handleMessage(Message msg) { |
| if (collectMessages) { |
| collectedMessages.add(msg); |
| } |
| Object o = msg.getHeader(nakackHeaderId); |
| if (o != null) { |
| mcastSentDataMessages++; |
| } else { |
| o = msg.getHeader(unicastHeaderId); |
| if (o != null) { |
| UNICAST3.Header hdr = (UNICAST3.Header) o; |
| switch (hdr.type()) { |
| case UNICAST3.Header.DATA: |
| unicastSentDataMessages++; |
| Message response = new Message(uuid, msg.getDest(), null); |
| response.putHeader(unicastHeaderId, UNICAST3.Header.createAckHeader(hdr.seqno(), |
| hdr.connId(), System.currentTimeMillis())); |
| up_prot.up(new Event(Event.MSG, response)); |
| break; |
| } |
| } |
| } |
| } |
| } |