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GOSSIP-56 GossipCore should allow registration of handlers

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MessageInvoker idea. Returns true when it managed to invoke one of
handlers. User can build any structure of handlers.
See tests: MessageInvokerTest.
This commit is contained in:
Maxim Rusak
2017-02-16 12:35:56 +03:00
parent 7106cc400a
commit 2133cb0549
15 changed files with 701 additions and 159 deletions
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178
src/main/java/org/apache/gossip/manager/GossipCore.java
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@ -17,6 +17,17 @@
*/
package org.apache.gossip.manager;
import com.codahale.metrics.Gauge;
import com.codahale.metrics.Meter;
import com.codahale.metrics.MetricRegistry;
import org.apache.gossip.GossipMember;
import org.apache.gossip.LocalGossipMember;
import org.apache.gossip.RemoteGossipMember;
import org.apache.gossip.event.GossipState;
import org.apache.gossip.model.*;
import org.apache.gossip.udp.Trackable;
import org.apache.log4j.Logger;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
@ -24,53 +35,15 @@ import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.URI;
import java.net.URISyntaxException;
import java.security.InvalidKeyException;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.PrivateKey;
import java.security.Signature;
import java.security.SignatureException;
import java.security.*;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.util.ArrayList;
import java.util.List;
import java.util.Map.Entry;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import org.apache.gossip.GossipMember;
import org.apache.gossip.LocalGossipMember;
import org.apache.gossip.RemoteGossipMember;
import org.apache.gossip.event.GossipState;
import org.apache.gossip.model.ActiveGossipMessage;
import org.apache.gossip.model.Base;
import org.apache.gossip.model.GossipDataMessage;
import org.apache.gossip.model.Response;
import org.apache.gossip.model.SharedGossipDataMessage;
import org.apache.gossip.model.ShutdownMessage;
import org.apache.gossip.model.SignedPayload;
import org.apache.gossip.udp.Trackable;
import org.apache.gossip.udp.UdpActiveGossipMessage;
import org.apache.gossip.udp.UdpActiveGossipOk;
import org.apache.gossip.udp.UdpGossipDataMessage;
import org.apache.gossip.udp.UdpNotAMemberFault;
import org.apache.gossip.udp.UdpSharedGossipDataMessage;
import org.apache.log4j.Logger;
import com.codahale.metrics.Gauge;
import com.codahale.metrics.Meter;
import com.codahale.metrics.MetricRegistry;
import java.util.concurrent.*;
public class GossipCore implements GossipCoreConstants {
public static final Logger LOGGER = Logger.getLogger(GossipCore.class);
private final GossipManager gossipManager;
private ConcurrentHashMap<String, Base> requests;
@ -83,7 +56,7 @@ public class GossipCore implements GossipCoreConstants {
private final Meter messageSerdeException;
private final Meter tranmissionException;
private final Meter tranmissionSuccess;
public GossipCore(GossipManager manager, MetricRegistry metrics){
this.gossipManager = manager;
requests = new ConcurrentHashMap<>();
@ -100,6 +73,7 @@ public class GossipCore implements GossipCoreConstants {
messageSerdeException = metrics.meter(MESSAGE_SERDE_EXCEPTION);
tranmissionException = metrics.meter(MESSAGE_TRANSMISSION_EXCEPTION);
tranmissionSuccess = metrics.meter(MESSAGE_TRANSMISSION_SUCCESS);
if (manager.getSettings().isSignMessages()){
File privateKey = new File(manager.getSettings().getPathToKeyStore(), manager.getMyself().getId());
File publicKey = new File(manager.getSettings().getPathToKeyStore(), manager.getMyself().getId() + ".pub");
@ -124,7 +98,7 @@ public class GossipCore implements GossipCoreConstants {
privKey = null;
}
}
private byte [] sign(byte [] bytes){
Signature dsa;
try {
@ -136,7 +110,7 @@ public class GossipCore implements GossipCoreConstants {
throw new RuntimeException(e);
}
}
public void addSharedData(SharedGossipDataMessage message){
SharedGossipDataMessage previous = sharedData.get(message.getKey());
if (previous == null){
@ -163,11 +137,11 @@ public class GossipCore implements GossipCoreConstants {
}
}
}
public ConcurrentHashMap<String, ConcurrentHashMap<String, GossipDataMessage>> getPerNodeData(){
return perNodeData;
}
public ConcurrentHashMap<String, SharedGossipDataMessage> getSharedData() {
return sharedData;
}
@ -181,74 +155,15 @@ public class GossipCore implements GossipCoreConstants {
}
service.shutdownNow();
}
public void receive(Base base){
if (base instanceof Response){
if (base instanceof Trackable){
Trackable t = (Trackable) base;
requests.put(t.getUuid() + "/" + t.getUriFrom(), (Base) t);
}
}
if (base instanceof ShutdownMessage){
ShutdownMessage s = (ShutdownMessage) base;
GossipDataMessage m = new GossipDataMessage();
m.setKey(ShutdownMessage.PER_NODE_KEY);
m.setNodeId(s.getNodeId());
m.setPayload(base);
m.setTimestamp(System.currentTimeMillis());
m.setExpireAt(System.currentTimeMillis() + 30L * 1000L);
addPerNodeData(m);
}
if (base instanceof GossipDataMessage) {
UdpGossipDataMessage message = (UdpGossipDataMessage) base;
addPerNodeData(message);
}
if (base instanceof SharedGossipDataMessage){
UdpSharedGossipDataMessage message = (UdpSharedGossipDataMessage) base;
addSharedData(message);
}
if (base instanceof ActiveGossipMessage){
List<GossipMember> remoteGossipMembers = new ArrayList<>();
RemoteGossipMember senderMember = null;
UdpActiveGossipMessage activeGossipMessage = (UdpActiveGossipMessage) base;
for (int i = 0; i < activeGossipMessage.getMembers().size(); i++) {
URI u = null;
try {
u = new URI(activeGossipMessage.getMembers().get(i).getUri());
} catch (URISyntaxException e) {
LOGGER.debug("Gossip message with faulty URI", e);
continue;
}
RemoteGossipMember member = new RemoteGossipMember(
activeGossipMessage.getMembers().get(i).getCluster(),
u,
activeGossipMessage.getMembers().get(i).getId(),
activeGossipMessage.getMembers().get(i).getHeartbeat(),
activeGossipMessage.getMembers().get(i).getProperties());
if (i == 0) {
senderMember = member;
}
if (!(member.getClusterName().equals(gossipManager.getMyself().getClusterName()))){
UdpNotAMemberFault f = new UdpNotAMemberFault();
f.setException("Not a member of this cluster " + i);
f.setUriFrom(activeGossipMessage.getUriFrom());
f.setUuid(activeGossipMessage.getUuid());
LOGGER.warn(f);
sendOneWay(f, member.getUri());
continue;
}
remoteGossipMembers.add(member);
}
UdpActiveGossipOk o = new UdpActiveGossipOk();
o.setUriFrom(activeGossipMessage.getUriFrom());
o.setUuid(activeGossipMessage.getUuid());
sendOneWay(o, senderMember.getUri());
mergeLists(gossipManager, senderMember, remoteGossipMembers);
public void receive(Base base) {
if (!gossipManager.getMessageInvoker().invoke(this, gossipManager, base)) {
LOGGER.warn("received message can not be handled");
}
}
/**
* Sends a blocking message.
* Sends a blocking message.
* @param message
* @param uri
* @throws RuntimeException if data can not be serialized or in transmission error
@ -277,15 +192,15 @@ public class GossipCore implements GossipCoreConstants {
} catch (IOException e) {
tranmissionException.mark();
throw new RuntimeException(e);
}
}
}
public Response send(Base message, URI uri){
if (LOGGER.isDebugEnabled()){
LOGGER.debug("Sending " + message);
LOGGER.debug("Sending " + message);
LOGGER.debug("Current request queue " + requests);
}
final Trackable t;
if (message instanceof Trackable){
t = (Trackable) message;
@ -307,12 +222,12 @@ public class GossipCore implements GossipCoreConstants {
try {
Thread.sleep(0, 555555);
} catch (InterruptedException e) {
}
}
}
});
try {
//TODO this needs to be a setting base on attempts/second
return response.get(1, TimeUnit.SECONDS);
@ -324,14 +239,14 @@ public class GossipCore implements GossipCoreConstants {
} catch (TimeoutException e) {
boolean cancelled = response.cancel(true);
LOGGER.debug(String.format("Threadpool timeout attempting to contact %s, cancelled ? %b", uri.toString(), cancelled));
return null;
return null;
} finally {
if (t != null){
requests.remove(t.getUuid() + "/" + t.getUriFrom());
}
}
}
/**
* Sends a message across the network while blocking. Catches and ignores IOException in transmission. Used
* when the protocol for the message is not to wait for a response
@ -359,21 +274,25 @@ public class GossipCore implements GossipCoreConstants {
DatagramPacket datagramPacket = new DatagramPacket(json_bytes, json_bytes.length, dest, u.getPort());
socket.send(datagramPacket);
tranmissionSuccess.mark();
} catch (IOException ex) {
} catch (IOException ex) {
tranmissionException.mark();
LOGGER.debug("Send one way failed", ex);
}
}
public void addRequest(String k, Base v) {
requests.put(k, v);
}
/**
* Merge lists from remote members and update heartbeats
*
*
* @param gossipManager
* @param senderMember
* @param remoteList
*
*
*/
protected void mergeLists(GossipManager gossipManager, RemoteGossipMember senderMember,
public void mergeLists(GossipManager gossipManager, RemoteGossipMember senderMember,
List<GossipMember> remoteList) {
if (LOGGER.isDebugEnabled()){
debugState(senderMember, remoteList);
@ -390,10 +309,10 @@ public class GossipCore implements GossipCoreConstants {
if (remoteMember.getId().equals(gossipManager.getMyself().getId())) {
continue;
}
LocalGossipMember aNewMember = new LocalGossipMember(remoteMember.getClusterName(),
remoteMember.getUri(),
remoteMember.getId(),
remoteMember.getHeartbeat(),
LocalGossipMember aNewMember = new LocalGossipMember(remoteMember.getClusterName(),
remoteMember.getUri(),
remoteMember.getId(),
remoteMember.getHeartbeat(),
remoteMember.getProperties(),
gossipManager.getSettings().getWindowSize(),
gossipManager.getSettings().getMinimumSamples(),
@ -414,11 +333,11 @@ public class GossipCore implements GossipCoreConstants {
debugState(senderMember, remoteList);
}
}
private void debugState(RemoteGossipMember senderMember,
List<GossipMember> remoteList){
LOGGER.warn(
"-----------------------\n" +
"-----------------------\n" +
"Me " + gossipManager.getMyself() + "\n" +
"Sender " + senderMember + "\n" +
"RemoteList " + remoteList + "\n" +
@ -426,5 +345,4 @@ public class GossipCore implements GossipCoreConstants {
"Dead " + gossipManager.getDeadMembers()+ "\n" +
"=======================");
}
}

45
src/main/java/org/apache/gossip/manager/GossipManager.java
View File

@ -19,6 +19,17 @@ package org.apache.gossip.manager;
import com.codahale.metrics.MetricRegistry;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.gossip.GossipMember;
import org.apache.gossip.GossipSettings;
import org.apache.gossip.LocalGossipMember;
import org.apache.gossip.event.GossipListener;
import org.apache.gossip.event.GossipState;
import org.apache.gossip.manager.handlers.MessageInvoker;
import org.apache.gossip.manager.impl.OnlyProcessReceivedPassiveGossipThread;
import org.apache.gossip.model.GossipDataMessage;
import org.apache.gossip.model.SharedGossipDataMessage;
import org.apache.gossip.model.ShutdownMessage;
import org.apache.log4j.Logger;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
@ -28,28 +39,10 @@ import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Objects;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentSkipListMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.stream.Collectors;
import org.apache.log4j.Logger;
import org.apache.gossip.GossipMember;
import org.apache.gossip.GossipSettings;
import org.apache.gossip.LocalGossipMember;
import org.apache.gossip.event.GossipListener;
import org.apache.gossip.event.GossipState;
import org.apache.gossip.manager.impl.OnlyProcessReceivedPassiveGossipThread;
import org.apache.gossip.model.GossipDataMessage;
import org.apache.gossip.model.SharedGossipDataMessage;
import org.apache.gossip.model.ShutdownMessage;
public abstract class GossipManager {
@ -71,11 +64,15 @@ public abstract class GossipManager {
private final RingStatePersister ringState;
private final UserDataPersister userDataState;
private final ObjectMapper objectMapper;
private final MessageInvoker messageInvoker;
public GossipManager(String cluster,
URI uri, String id, Map<String,String> properties, GossipSettings settings,
List<GossipMember> gossipMembers, GossipListener listener, MetricRegistry registry, ObjectMapper objectMapper) {
URI uri, String id, Map<String, String> properties, GossipSettings settings,
List<GossipMember> gossipMembers, GossipListener listener, MetricRegistry registry,
ObjectMapper objectMapper, MessageInvoker messageInvoker) {
this.settings = settings;
this.messageInvoker = messageInvoker;
clock = new SystemClock();
me = new LocalGossipMember(cluster, uri, id, clock.nanoTime(), properties,
settings.getWindowSize(), settings.getMinimumSamples(), settings.getDistribution());
@ -104,6 +101,10 @@ public abstract class GossipManager {
readSavedDataState();
}
public MessageInvoker getMessageInvoker() {
return messageInvoker;
}
public ConcurrentSkipListMap<LocalGossipMember, GossipState> getMembers() {
return members;
}

74
src/main/java/org/apache/gossip/manager/handlers/ActiveGossipMessageHandler.java Normal file
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@ -0,0 +1,74 @@
/*
* 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.handlers;
import org.apache.gossip.GossipMember;
import org.apache.gossip.RemoteGossipMember;
import org.apache.gossip.manager.GossipCore;
import org.apache.gossip.manager.GossipManager;
import org.apache.gossip.model.Base;
import org.apache.gossip.udp.UdpActiveGossipMessage;
import org.apache.gossip.udp.UdpActiveGossipOk;
import org.apache.gossip.udp.UdpNotAMemberFault;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
public class ActiveGossipMessageHandler implements MessageHandler {
@Override
public void invoke(GossipCore gossipCore, GossipManager gossipManager, Base base) {
List<GossipMember> remoteGossipMembers = new ArrayList<>();
RemoteGossipMember senderMember = null;
UdpActiveGossipMessage activeGossipMessage = (UdpActiveGossipMessage) base;
for (int i = 0; i < activeGossipMessage.getMembers().size(); i++) {
URI u;
try {
u = new URI(activeGossipMessage.getMembers().get(i).getUri());
} catch (URISyntaxException e) {
GossipCore.LOGGER.debug("Gossip message with faulty URI", e);
continue;
}
RemoteGossipMember member = new RemoteGossipMember(
activeGossipMessage.getMembers().get(i).getCluster(),
u,
activeGossipMessage.getMembers().get(i).getId(),
activeGossipMessage.getMembers().get(i).getHeartbeat(),
activeGossipMessage.getMembers().get(i).getProperties());
if (i == 0) {
senderMember = member;
}
if (!(member.getClusterName().equals(gossipManager.getMyself().getClusterName()))) {
UdpNotAMemberFault f = new UdpNotAMemberFault();
f.setException("Not a member of this cluster " + i);
f.setUriFrom(activeGossipMessage.getUriFrom());
f.setUuid(activeGossipMessage.getUuid());
GossipCore.LOGGER.warn(f);
gossipCore.sendOneWay(f, member.getUri());
continue;
}
remoteGossipMembers.add(member);
}
UdpActiveGossipOk o = new UdpActiveGossipOk();
o.setUriFrom(activeGossipMessage.getUriFrom());
o.setUuid(activeGossipMessage.getUuid());
gossipCore.sendOneWay(o, senderMember.getUri());
gossipCore.mergeLists(gossipManager, senderMember, remoteGossipMembers);
}
}

40
src/main/java/org/apache/gossip/manager/handlers/DefaultMessageInvoker.java Normal file
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@ -0,0 +1,40 @@
/*
* 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.handlers;
import org.apache.gossip.manager.GossipCore;
import org.apache.gossip.manager.GossipManager;
import org.apache.gossip.model.*;
public class DefaultMessageInvoker implements MessageInvoker {
private final MessageInvokerCombiner mic;
public DefaultMessageInvoker() {
mic = new MessageInvokerCombiner();
mic.add(new SimpleMessageInvoker(Response.class, new ResponseHandler()));
mic.add(new SimpleMessageInvoker(ShutdownMessage.class, new ShutdownMessageHandler()));
mic.add(new SimpleMessageInvoker(GossipDataMessage.class, new GossipDataMessageHandler()));
mic.add(new SimpleMessageInvoker(SharedGossipDataMessage.class, new SharedGossipDataMessageHandler()));
mic.add(new SimpleMessageInvoker(ActiveGossipMessage.class, new ActiveGossipMessageHandler()));
}
public boolean invoke(GossipCore gossipCore, GossipManager gossipManager, Base base) {
return mic.invoke(gossipCore, gossipManager, base);
}
}

31
src/main/java/org/apache/gossip/manager/handlers/GossipDataMessageHandler.java Normal file
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@ -0,0 +1,31 @@
/*
* 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.handlers;
import org.apache.gossip.manager.GossipCore;
import org.apache.gossip.manager.GossipManager;
import org.apache.gossip.model.Base;
import org.apache.gossip.udp.UdpGossipDataMessage;
public class GossipDataMessageHandler implements MessageHandler {
@Override
public void invoke(GossipCore gossipCore, GossipManager gossipManager, Base base) {
UdpGossipDataMessage message = (UdpGossipDataMessage) base;
gossipCore.addPerNodeData(message);
}
}

26
src/main/java/org/apache/gossip/manager/handlers/MessageHandler.java Normal file
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@ -0,0 +1,26 @@
/*
* 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.handlers;
import org.apache.gossip.manager.GossipCore;
import org.apache.gossip.manager.GossipManager;
import org.apache.gossip.model.Base;
public interface MessageHandler {
void invoke(GossipCore gossipCore, GossipManager gossipManager, Base base);
}

26
src/main/java/org/apache/gossip/manager/handlers/MessageInvoker.java Normal file
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@ -0,0 +1,26 @@
/*
* 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.handlers;
import org.apache.gossip.manager.GossipCore;
import org.apache.gossip.manager.GossipManager;
import org.apache.gossip.model.Base;
public interface MessageInvoker {
boolean invoke(GossipCore gossipCore, GossipManager gossipManager, Base base);
}

58
src/main/java/org/apache/gossip/manager/handlers/MessageInvokerCombiner.java Normal file
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@ -0,0 +1,58 @@
/*
* 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.handlers;
import org.apache.gossip.manager.GossipCore;
import org.apache.gossip.manager.GossipManager;
import org.apache.gossip.model.Base;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
public class MessageInvokerCombiner implements MessageInvoker {
private List<MessageInvoker> invokers;
public MessageInvokerCombiner() {
}
public boolean invoke(GossipCore gossipCore, GossipManager gossipManager, Base base) {
if (invokers == null) {
return false;
}
boolean result = false;
for (MessageInvoker mi : invokers) {
result = mi.invoke(gossipCore, gossipManager, base) || result;
}
return result;
}
public void clear() {
invokers = null;
}
public void add(MessageInvoker mi) {
if (mi == null) {
throw new NullPointerException();
}
if (invokers == null) {
invokers = new CopyOnWriteArrayList<>();
}
invokers.add(mi);
}
}

35
src/main/java/org/apache/gossip/manager/handlers/ResponseHandler.java Normal file
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@ -0,0 +1,35 @@
/*
* 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.handlers;
import org.apache.gossip.manager.GossipCore;
import org.apache.gossip.manager.GossipManager;
import org.apache.gossip.model.Base;
import org.apache.gossip.model.GossipDataMessage;
import org.apache.gossip.model.ShutdownMessage;
import org.apache.gossip.udp.Trackable;
public class ResponseHandler implements MessageHandler {
@Override
public void invoke(GossipCore gossipCore, GossipManager gossipManager, Base base) {
if (base instanceof Trackable) {
Trackable t = (Trackable) base;
gossipCore.addRequest(t.getUuid() + "/" + t.getUriFrom(), (Base) t);
}
}
}

31
src/main/java/org/apache/gossip/manager/handlers/SharedGossipDataMessageHandler.java Normal file
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@ -0,0 +1,31 @@
/*
* 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.handlers;
import org.apache.gossip.manager.GossipCore;
import org.apache.gossip.manager.GossipManager;
import org.apache.gossip.model.Base;
import org.apache.gossip.udp.UdpSharedGossipDataMessage;
public class SharedGossipDataMessageHandler implements MessageHandler{
@Override
public void invoke(GossipCore gossipCore, GossipManager gossipManager, Base base) {
UdpSharedGossipDataMessage message = (UdpSharedGossipDataMessage) base;
gossipCore.addSharedData(message);
}
}

38
src/main/java/org/apache/gossip/manager/handlers/ShutdownMessageHandler.java Normal file
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@ -0,0 +1,38 @@
/*
* 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.handlers;
import org.apache.gossip.manager.GossipCore;
import org.apache.gossip.manager.GossipManager;
import org.apache.gossip.model.Base;
import org.apache.gossip.model.GossipDataMessage;
import org.apache.gossip.model.ShutdownMessage;
public class ShutdownMessageHandler implements MessageHandler {
@Override
public void invoke(GossipCore gossipCore, GossipManager gossipManager, Base base) {
ShutdownMessage s = (ShutdownMessage) base;
GossipDataMessage m = new GossipDataMessage();
m.setKey(ShutdownMessage.PER_NODE_KEY);
m.setNodeId(s.getNodeId());
m.setPayload(base);
m.setTimestamp(System.currentTimeMillis());
m.setExpireAt(System.currentTimeMillis() + 30L * 1000L);
gossipCore.addPerNodeData(m);
}
}

45
src/main/java/org/apache/gossip/manager/handlers/SimpleMessageInvoker.java Normal file
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@ -0,0 +1,45 @@
/*
* 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.handlers;
import org.apache.gossip.manager.GossipCore;
import org.apache.gossip.manager.GossipManager;
import org.apache.gossip.model.Base;
public class SimpleMessageInvoker implements MessageInvoker {
final private Class<?> messageClass;
final private MessageHandler messageHandler;
public SimpleMessageInvoker(Class<?> messageClass, MessageHandler messageHandler) {
if (messageClass == null || messageHandler == null) {
throw new NullPointerException();
}
this.messageClass = messageClass;
this.messageHandler = messageHandler;
}
@Override
public boolean invoke(GossipCore gossipCore, GossipManager gossipManager, Base base) {
if (messageClass.isAssignableFrom(base.getClass())) {
messageHandler.invoke(gossipCore, gossipManager, base);
return true;
} else {
return false;
}
}
}

24
src/main/java/org/apache/gossip/manager/random/RandomGossipManager.java
View File

@ -19,17 +19,18 @@ package org.apache.gossip.manager.random;
import com.codahale.metrics.MetricRegistry;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.gossip.GossipMember;
import org.apache.gossip.GossipSettings;
import org.apache.gossip.event.GossipListener;
import org.apache.gossip.manager.GossipManager;
import org.apache.gossip.manager.handlers.DefaultMessageInvoker;
import org.apache.gossip.manager.handlers.MessageInvoker;
import java.net.URI;
import java.util.List;
import java.util.Map;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class RandomGossipManager extends GossipManager {
@ -47,6 +48,7 @@ public class RandomGossipManager extends GossipManager {
private MetricRegistry registry;
private Map<String,String> properties;
private ObjectMapper objectMapper;
private MessageInvoker messageInvoker;
private ManagerBuilder() {}
@ -100,7 +102,12 @@ public class RandomGossipManager extends GossipManager {
this.objectMapper = objectMapper;
return this;
}
public ManagerBuilder messageInvoker(MessageInvoker messageInvoker) {
this.messageInvoker = messageInvoker;
return this;
}
public RandomGossipManager build() {
checkArgument(id != null, "You must specify an id");
checkArgument(cluster != null, "You must specify a cluster name");
@ -120,12 +127,15 @@ public class RandomGossipManager extends GossipManager {
objectMapper = new ObjectMapper();
objectMapper.enableDefaultTyping();
}
return new RandomGossipManager(cluster, uri, id, properties, settings, gossipMembers, listener, registry, objectMapper);
if (messageInvoker == null) {
messageInvoker = new DefaultMessageInvoker();
}
return new RandomGossipManager(cluster, uri, id, properties, settings, gossipMembers, listener, registry, objectMapper, messageInvoker);
}
}
private RandomGossipManager(String cluster, URI uri, String id, Map<String,String> properties, GossipSettings settings,
List<GossipMember> gossipMembers, GossipListener listener, MetricRegistry registry, ObjectMapper objectMapper) {
super(cluster, uri, id, properties, settings, gossipMembers, listener, registry, objectMapper);
List<GossipMember> gossipMembers, GossipListener listener, MetricRegistry registry, ObjectMapper objectMapper, MessageInvoker messageInvoker) {
super(cluster, uri, id, properties, settings, gossipMembers, listener, registry, objectMapper, messageInvoker);
}
}