| /* |
| * 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.gossip.manager; |
| |
| import java.util.Map.Entry; |
| import java.util.List; |
| import java.util.Random; |
| import java.util.UUID; |
| import java.util.concurrent.ConcurrentHashMap; |
| import com.codahale.metrics.Histogram; |
| import com.codahale.metrics.MetricRegistry; |
| import org.apache.gossip.LocalMember; |
| import org.apache.gossip.model.ActiveGossipOk; |
| import org.apache.gossip.model.PerNodeDataMessage; |
| import org.apache.gossip.model.Member; |
| import org.apache.gossip.model.Response; |
| import org.apache.gossip.model.SharedDataMessage; |
| import org.apache.gossip.model.ShutdownMessage; |
| import org.apache.gossip.udp.UdpActiveGossipMessage; |
| import org.apache.gossip.udp.UdpPerNodeDataMessage; |
| import org.apache.gossip.udp.UdpSharedDataMessage; |
| import org.apache.log4j.Logger; |
| |
| import static com.codahale.metrics.MetricRegistry.name; |
| |
| /** |
| * The ActiveGossipThread is sends information. Pick a random partner and send the membership list to that partner |
| */ |
| public abstract class AbstractActiveGossiper { |
| |
| protected static final Logger LOGGER = Logger.getLogger(AbstractActiveGossiper.class); |
| |
| protected final GossipManager gossipManager; |
| protected final GossipCore gossipCore; |
| private final Histogram sharedDataHistogram; |
| private final Histogram sendPerNodeDataHistogram; |
| private final Histogram sendMembershipHistorgram; |
| private final Random random; |
| |
| public AbstractActiveGossiper(GossipManager gossipManager, GossipCore gossipCore, MetricRegistry registry) { |
| this.gossipManager = gossipManager; |
| this.gossipCore = gossipCore; |
| sharedDataHistogram = registry.histogram(name(AbstractActiveGossiper.class, "sharedDataHistogram-time")); |
| sendPerNodeDataHistogram = registry.histogram(name(AbstractActiveGossiper.class, "sendPerNodeDataHistogram-time")); |
| sendMembershipHistorgram = registry.histogram(name(AbstractActiveGossiper.class, "sendMembershipHistorgram-time")); |
| random = new Random(); |
| } |
| |
| public void init() { |
| |
| } |
| |
| public void shutdown() { |
| |
| } |
| |
| public final void sendShutdownMessage(LocalMember me, LocalMember target){ |
| if (target == null){ |
| return; |
| } |
| ShutdownMessage m = new ShutdownMessage(); |
| m.setNodeId(me.getId()); |
| m.setShutdownAtNanos(gossipManager.getClock().nanoTime()); |
| gossipCore.sendOneWay(m, target.getUri()); |
| } |
| |
| public final void sendSharedData(LocalMember me, LocalMember member){ |
| if (member == null){ |
| return; |
| } |
| long startTime = System.currentTimeMillis(); |
| for (Entry<String, SharedDataMessage> innerEntry : gossipCore.getSharedData().entrySet()){ |
| if (innerEntry.getValue().getReplicable() != null && !innerEntry.getValue().getReplicable() |
| .shouldReplicate(me, member, innerEntry.getValue())) { |
| continue; |
| } |
| UdpSharedDataMessage message = new UdpSharedDataMessage(); |
| message.setUuid(UUID.randomUUID().toString()); |
| message.setUriFrom(me.getId()); |
| message.setExpireAt(innerEntry.getValue().getExpireAt()); |
| message.setKey(innerEntry.getValue().getKey()); |
| message.setNodeId(innerEntry.getValue().getNodeId()); |
| message.setTimestamp(innerEntry.getValue().getTimestamp()); |
| message.setPayload(innerEntry.getValue().getPayload()); |
| message.setReplicable(innerEntry.getValue().getReplicable()); |
| gossipCore.sendOneWay(message, member.getUri()); |
| } |
| sharedDataHistogram.update(System.currentTimeMillis() - startTime); |
| } |
| |
| public final void sendPerNodeData(LocalMember me, LocalMember member){ |
| if (member == null){ |
| return; |
| } |
| long startTime = System.currentTimeMillis(); |
| for (Entry<String, ConcurrentHashMap<String, PerNodeDataMessage>> entry : gossipCore.getPerNodeData().entrySet()){ |
| for (Entry<String, PerNodeDataMessage> innerEntry : entry.getValue().entrySet()){ |
| if (innerEntry.getValue().getReplicable() != null && !innerEntry.getValue().getReplicable() |
| .shouldReplicate(me, member, innerEntry.getValue())) { |
| continue; |
| } |
| UdpPerNodeDataMessage message = new UdpPerNodeDataMessage(); |
| message.setUuid(UUID.randomUUID().toString()); |
| message.setUriFrom(me.getId()); |
| message.setExpireAt(innerEntry.getValue().getExpireAt()); |
| message.setKey(innerEntry.getValue().getKey()); |
| message.setNodeId(innerEntry.getValue().getNodeId()); |
| message.setTimestamp(innerEntry.getValue().getTimestamp()); |
| message.setPayload(innerEntry.getValue().getPayload()); |
| message.setReplicable(innerEntry.getValue().getReplicable()); |
| gossipCore.sendOneWay(message, member.getUri()); |
| } |
| } |
| sendPerNodeDataHistogram.update(System.currentTimeMillis() - startTime); |
| } |
| |
| /** |
| * Performs the sending of the membership list, after we have incremented our own heartbeat. |
| */ |
| protected void sendMembershipList(LocalMember me, LocalMember member) { |
| if (member == null){ |
| return; |
| } |
| long startTime = System.currentTimeMillis(); |
| me.setHeartbeat(System.nanoTime()); |
| UdpActiveGossipMessage message = new UdpActiveGossipMessage(); |
| message.setUriFrom(gossipManager.getMyself().getUri().toASCIIString()); |
| message.setUuid(UUID.randomUUID().toString()); |
| message.getMembers().add(convert(me)); |
| for (LocalMember other : gossipManager.getMembers().keySet()) { |
| message.getMembers().add(convert(other)); |
| } |
| Response r = gossipCore.send(message, member.getUri()); |
| if (r instanceof ActiveGossipOk){ |
| //maybe count metrics here |
| } else { |
| LOGGER.debug("Message " + message + " generated response " + r); |
| } |
| sendMembershipHistorgram.update(System.currentTimeMillis() - startTime); |
| } |
| |
| protected final Member convert(LocalMember member){ |
| Member gm = new Member(); |
| gm.setCluster(member.getClusterName()); |
| gm.setHeartbeat(member.getHeartbeat()); |
| gm.setUri(member.getUri().toASCIIString()); |
| gm.setId(member.getId()); |
| gm.setProperties(member.getProperties()); |
| return gm; |
| } |
| |
| /** |
| * |
| * @param memberList |
| * An immutable list |
| * @return The chosen LocalGossipMember to gossip with. |
| */ |
| protected LocalMember selectPartner(List<LocalMember> memberList) { |
| LocalMember member = null; |
| if (memberList.size() > 0) { |
| int randomNeighborIndex = random.nextInt(memberList.size()); |
| member = memberList.get(randomNeighborIndex); |
| } |
| return member; |
| } |
| } |