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Edward Capriolo
2016-04-29 13:35:51 -04:00
parent a040e2cd36
commit a7f90aae08
18 changed files with 674 additions and 356 deletions
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eclipse_template.xml Normal file
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<profiles version="12">
<profile kind="CodeFormatterProfile" name="Apache UIMA Code Conventions" version="12">
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<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_allocation_expression" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_at_in_annotation_type_declaration" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.comment.new_lines_at_block_boundaries" value="true"/>
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</profiles>

98
src/main/java/com/google/code/gossip/GossipMember.java
View File

@ -30,34 +30,48 @@ import org.json.JSONObject;
public abstract class GossipMember implements Comparable<GossipMember> {
public static final String JSON_HOST = "host";
public static final String JSON_PORT = "port";
public static final String JSON_HEARTBEAT = "heartbeat";
public static final String JSON_ID = "id";
public static final String JSON_CLUSTER = "cluster";
protected final String _host;
protected final int _port;
protected volatile long _heartbeat;
protected final String _clusterName;
protected final String host;
protected final int port;
protected volatile long heartbeat;
protected final String clusterName;
/**
* The purpose of the id field is to be able for nodes to identify themselves beyond there host/port. For example
* an application might generate a persistent id so if they rejoin the cluster at a different host and port we
* are aware it is the same node.
* The purpose of the id field is to be able for nodes to identify themselves beyond there
* host/port. For example an application might generate a persistent id so if they rejoin the
* cluster at a different host and port we are aware it is the same node.
*/
protected String _id;
protected String id;
/**
* Constructor.
* @param host The hostname or IP address.
* @param port The port number.
* @param heartbeat The current heartbeat.
* @param id an id that may be replaced after contact
*
* @param host
* The hostname or IP address.
* @param port
* The port number.
* @param heartbeat
* The current heartbeat.
* @param id
* an id that may be replaced after contact
*/
public GossipMember(String clusterName, String host, int port, String id, long heartbeat) {
_clusterName = clusterName;
_host = host;
_port = port;
_id = id;
_heartbeat = heartbeat;
this.clusterName = clusterName;
this.host = host;
this.port = port;
this.id = id;
this.heartbeat = heartbeat;
}
/**
@ -66,60 +80,64 @@ public abstract class GossipMember implements Comparable<GossipMember>{
* @return The cluster name
*/
public String getClusterName() {
return _clusterName;
return clusterName;
}
/**
* Get the hostname or IP address of the remote gossip member.
*
* @return The hostname or IP address.
*/
public String getHost() {
return _host;
return host;
}
/**
* Get the port number of the remote gossip member.
*
* @return The port number.
*/
public int getPort() {
return _port;
return port;
}
/**
* The member address in the form IP/host:port
* Similar to the toString in {@link InetSocketAddress}
* The member address in the form IP/host:port Similar to the toString in
* {@link InetSocketAddress}
*/
public String getAddress() {
return _host+":"+_port;
return host + ":" + port;
}
/**
* Get the heartbeat of this gossip member.
*
* @return The current heartbeat.
*/
public long getHeartbeat() {
return _heartbeat;
return heartbeat;
}
/**
* Set the heartbeat of this gossip member.
* @param heartbeat The new heartbeat.
*
* @param heartbeat
* The new heartbeat.
*/
public void setHeartbeat(long heartbeat) {
this._heartbeat = heartbeat;
this.heartbeat = heartbeat;
}
public String getId() {
return _id;
return id;
}
public void setId(String _id) {
this._id = _id;
this.id = _id;
}
public String toString() {
return "Member [address=" + getAddress() + ", id=" + _id + ", heartbeat=" + _heartbeat + "]";
return "Member [address=" + getAddress() + ", id=" + id + ", heartbeat=" + heartbeat + "]";
}
/**
@ -130,9 +148,8 @@ public abstract class GossipMember implements Comparable<GossipMember>{
final int prime = 31;
int result = 1;
String address = getAddress();
result = prime * result
+ ((address == null) ? 0 : address.hashCode())
+ _clusterName == null ? 0 : _clusterName.hashCode();
result = prime * result + ((address == null) ? 0 : address.hashCode()) + clusterName == null ? 0
: clusterName.hashCode();
return result;
}
@ -153,22 +170,23 @@ public abstract class GossipMember implements Comparable<GossipMember>{
return false;
}
// The object is the same of they both have the same address (hostname and port).
return getAddress().equals(((LocalGossipMember) obj).getAddress()) &&
getClusterName().equals(((LocalGossipMember) obj).getClusterName());
return getAddress().equals(((LocalGossipMember) obj).getAddress())
&& getClusterName().equals(((LocalGossipMember) obj).getClusterName());
}
/**
* Get the JSONObject which is the JSON representation of this GossipMember.
*
* @return The JSONObject of this GossipMember.
*/
public JSONObject toJSONObject() {
try {
JSONObject jsonObject = new JSONObject();
jsonObject.put(JSON_CLUSTER, _clusterName);
jsonObject.put(JSON_HOST, _host);
jsonObject.put(JSON_PORT, _port);
jsonObject.put(JSON_ID, _id);
jsonObject.put(JSON_HEARTBEAT, _heartbeat);
jsonObject.put(JSON_CLUSTER, clusterName);
jsonObject.put(JSON_HOST, host);
jsonObject.put(JSON_PORT, port);
jsonObject.put(JSON_ID, id);
jsonObject.put(JSON_HEARTBEAT, heartbeat);
return jsonObject;
} catch (JSONException e) {
throw new RuntimeException(e);

3
src/main/java/com/google/code/gossip/GossipRunner.java
View File

@ -27,18 +27,15 @@ public class GossipRunner {
public static void main(String[] args) {
File configFile;
if (args.length == 1) {
configFile = new File("./" + args[0]);
} else {
configFile = new File("gossip.conf");
}
new GossipRunner(configFile);
}
public GossipRunner(File configFile) {
if (configFile != null && configFile.exists()) {
try {
System.out.println("Parsing the configuration file...");

24
src/main/java/com/google/code/gossip/GossipService.java
View File

@ -36,7 +36,7 @@ public class GossipService {
public static final Logger LOGGER = Logger.getLogger(GossipService.class);
private GossipManager _gossipManager;
private GossipManager gossipManager;
/**
* Constructor with the default settings.
@ -46,9 +46,9 @@ public class GossipService {
*/
public GossipService(StartupSettings startupSettings) throws InterruptedException,
UnknownHostException {
this(startupSettings.getCluster(), InetAddress.getLocalHost().getHostAddress(), startupSettings.getPort(), startupSettings.getId(),
startupSettings.getGossipMembers(), startupSettings
.getGossipSettings(), null);
this(startupSettings.getCluster(), InetAddress.getLocalHost().getHostAddress(), startupSettings
.getPort(), startupSettings.getId(), startupSettings.getGossipMembers(),
startupSettings.getGossipSettings(), null);
}
/**
@ -60,26 +60,28 @@ public class GossipService {
public GossipService(String cluster, String ipAddress, int port, String id,
List<GossipMember> gossipMembers, GossipSettings settings, GossipListener listener)
throws InterruptedException, UnknownHostException {
_gossipManager = new RandomGossipManager(cluster, ipAddress, port, id, settings, gossipMembers, listener);
gossipManager = new RandomGossipManager(cluster, ipAddress, port, id, settings, gossipMembers,
listener);
}
public void start() {
String address = get_gossipManager().getMyself().getHost() + ":" + get_gossipManager().getMyself().getPort();
LOGGER.debug( "Starting: " + _gossipManager.getName() + " - " + address );
String address = get_gossipManager().getMyself().getHost() + ":"
+ get_gossipManager().getMyself().getPort();
LOGGER.debug("Starting: " + gossipManager.getName() + " - " + address);
_gossipManager.start();
gossipManager.start();
}
public void shutdown() {
_gossipManager.shutdown();
gossipManager.shutdown();
}
public GossipManager get_gossipManager() {
return _gossipManager;
return gossipManager;
}
public void set_gossipManager(GossipManager _gossipManager) {
this._gossipManager = _gossipManager;
this.gossipManager = _gossipManager;
}
}

16
src/main/java/com/google/code/gossip/GossipSettings.java
View File

@ -25,10 +25,10 @@ package com.google.code.gossip;
public class GossipSettings {
/** Time between gossip'ing in ms. Default is 1 second. */
private int _gossipInterval = 1000;
private int gossipInterval = 1000;
/** Time between cleanups in ms. Default is 10 seconds. */
private int _cleanupInterval = 10000;
private int cleanupInterval = 10000;
/**
* Construct GossipSettings with default settings.
@ -45,8 +45,8 @@ public class GossipSettings {
* The cleanup interval in ms.
*/
public GossipSettings(int gossipInterval, int cleanupInterval) {
_gossipInterval = gossipInterval;
_cleanupInterval = cleanupInterval;
this.gossipInterval = gossipInterval;
this.cleanupInterval = cleanupInterval;
}
/**
@ -56,7 +56,7 @@ public class GossipSettings {
* The gossip interval in ms.
*/
public void setGossipTimeout(int gossipInterval) {
_gossipInterval = gossipInterval;
this.gossipInterval = gossipInterval;
}
/**
@ -67,7 +67,7 @@ public class GossipSettings {
* The cleanup interval in ms.
*/
public void setCleanupInterval(int cleanupInterval) {
_cleanupInterval = cleanupInterval;
this.cleanupInterval = cleanupInterval;
}
/**
@ -76,7 +76,7 @@ public class GossipSettings {
* @return The gossip interval in ms.
*/
public int getGossipInterval() {
return _gossipInterval;
return gossipInterval;
}
/**
@ -85,6 +85,6 @@ public class GossipSettings {
* @return The cleanup interval.
*/
public int getCleanupInterval() {
return _cleanupInterval;
return cleanupInterval;
}
}

13
src/main/java/com/google/code/gossip/GossipTimeoutTimer.java
View File

@ -31,8 +31,9 @@ import javax.management.timer.Timer;
*/
public class GossipTimeoutTimer extends Timer {
private final long _sleepTime;
private final LocalGossipMember _source;
private final long sleepTime;
private final LocalGossipMember source;
/**
* Constructor. Creates a reset-able timer that wakes up after millisecondsSleepTime.
@ -45,8 +46,8 @@ public class GossipTimeoutTimer extends Timer {
public GossipTimeoutTimer(long millisecondsSleepTime, NotificationListener notificationListener,
LocalGossipMember member) {
super();
_sleepTime = millisecondsSleepTime;
_source = member;
sleepTime = millisecondsSleepTime;
source = member;
addNotificationListener(notificationListener, null, null);
}
@ -63,7 +64,7 @@ public class GossipTimeoutTimer extends Timer {
*/
public void reset() {
removeAllNotifications();
setWakeupTime(_sleepTime);
setWakeupTime(sleepTime);
}
/**
@ -72,6 +73,6 @@ public class GossipTimeoutTimer extends Timer {
* @param milliseconds
*/
private void setWakeupTime(long milliseconds) {
addNotification("type", "message", _source, new Date(System.currentTimeMillis() + milliseconds));
addNotification("type", "message", source, new Date(System.currentTimeMillis() + milliseconds));
}
}

12
src/main/java/com/google/code/gossip/LocalGossipMember.java
View File

@ -43,28 +43,28 @@ public class LocalGossipMember extends GossipMember {
* @param cleanupTimeout
* The cleanup timeout for this gossip member.
*/
public LocalGossipMember(String clusterName, String hostname, int port, String id, long heartbeat,
NotificationListener notificationListener, int cleanupTimeout) {
public LocalGossipMember(String clusterName, String hostname, int port, String id,
long heartbeat, NotificationListener notificationListener, int cleanupTimeout) {
super(clusterName, hostname, port, id, heartbeat);
this.timeoutTimer = new GossipTimeoutTimer(cleanupTimeout, notificationListener, this);
timeoutTimer = new GossipTimeoutTimer(cleanupTimeout, notificationListener, this);
}
/**
* Start the timeout timer.
*/
public void startTimeoutTimer() {
this.timeoutTimer.start();
timeoutTimer.start();
}
/**
* Reset the timeout timer.
*/
public void resetTimeoutTimer() {
this.timeoutTimer.reset();
timeoutTimer.reset();
}
public void disableTimer() {
this.timeoutTimer.removeAllNotifications();
timeoutTimer.removeAllNotifications();
}
}

44
src/main/java/com/google/code/gossip/StartupSettings.java
View File

@ -39,18 +39,18 @@ public class StartupSettings {
private static final Logger log = Logger.getLogger(StartupSettings.class);
/** The id to use fo the service */
private String _id;
private String id;
/** The port to start the gossip service on. */
private int _port;
private int port;
private String cluster;
/** The gossip settings used at startup. */
private final GossipSettings _gossipSettings;
private final GossipSettings gossipSettings;
/** The list with gossip members to start with. */
private final List<GossipMember> _gossipMembers;
private final List<GossipMember> gossipMembers;
/**
* Constructor.
@ -75,10 +75,10 @@ public class StartupSettings {
* The port to start the service on.
*/
public StartupSettings(String id, int port, GossipSettings gossipSettings) {
_id = id;
_port = port;
_gossipSettings = gossipSettings;
_gossipMembers = new ArrayList<>();
this.id = id;
this.port = port;
this.gossipSettings = gossipSettings;
gossipMembers = new ArrayList<>();
}
public void setCluster(String cluster) {
@ -86,7 +86,7 @@ public class StartupSettings {
}
public String getCluster() {
return this.cluster;
return cluster;
}
/**
@ -96,7 +96,7 @@ public class StartupSettings {
* The id for this service.
*/
public void setId(String id) {
_id = id;
this.id = id;
}
/**
@ -105,7 +105,7 @@ public class StartupSettings {
* @return the service's id.
*/
public String getId() {
return _id;
return id;
}
/**
@ -115,7 +115,7 @@ public class StartupSettings {
* The port for the gossip service.
*/
public void setPort(int port) {
_port = port;
this.port = port;
}
/**
@ -124,7 +124,7 @@ public class StartupSettings {
* @return The port of the gossip service.
*/
public int getPort() {
return _port;
return port;
}
/**
@ -133,7 +133,7 @@ public class StartupSettings {
* @return The GossipSettings object.
*/
public GossipSettings getGossipSettings() {
return _gossipSettings;
return gossipSettings;
}
/**
@ -143,7 +143,7 @@ public class StartupSettings {
* The member to add.
*/
public void addGossipMember(GossipMember member) {
_gossipMembers.add(member);
gossipMembers.add(member);
}
/**
@ -152,7 +152,7 @@ public class StartupSettings {
* @return The gossip members.
*/
public List<GossipMember> getGossipMembers() {
return _gossipMembers;
return gossipMembers;
}
/**
@ -171,12 +171,14 @@ public class StartupSettings {
public static StartupSettings fromJSONFile(File jsonFile) throws JSONException,
FileNotFoundException, IOException {
// Read the file to a String.
BufferedReader br = new BufferedReader(new FileReader(jsonFile));
StringBuffer buffer = new StringBuffer();
try (BufferedReader br = new BufferedReader(new FileReader(jsonFile)) ){
String line;
while ((line = br.readLine()) != null) {
buffer.append(line.trim());
}
}
// Lets parse the String as JSON.
JSONObject jsonObject = new JSONArray(buffer.toString()).getJSONObject(0);
@ -194,16 +196,16 @@ public class StartupSettings {
int cleanupInterval = jsonObject.getInt("cleanup_interval");
// Initiate the settings with the port number.
StartupSettings settings = new StartupSettings(id, port, new GossipSettings(
gossipInterval, cleanupInterval));
StartupSettings settings = new StartupSettings(id, port, new GossipSettings(gossipInterval,
cleanupInterval));
// Now iterate over the members from the config file and add them to the settings.
String configMembersDetails = "Config-members [";
JSONArray membersJSON = jsonObject.getJSONArray("members");
for (int i = 0; i < membersJSON.length(); i++) {
JSONObject memberJSON = membersJSON.getJSONObject(i);
RemoteGossipMember member = new RemoteGossipMember(memberJSON.getString("cluster"), memberJSON.getString("host"),
memberJSON.getInt("port"), "");
RemoteGossipMember member = new RemoteGossipMember(memberJSON.getString("cluster"),
memberJSON.getString("host"), memberJSON.getInt("port"), "");
settings.addGossipMember(member);
configMembersDetails += member.getAddress();
if (i < (membersJSON.length() - 1))

18
src/main/java/com/google/code/gossip/manager/ActiveGossipThread.java
View File

@ -31,31 +31,31 @@ import com.google.code.gossip.LocalGossipMember;
*/
abstract public class ActiveGossipThread implements Runnable {
protected final GossipManager _gossipManager;
protected final GossipManager gossipManager;
private final AtomicBoolean _keepRunning;
private final AtomicBoolean keepRunning;
public ActiveGossipThread(GossipManager gossipManager) {
_gossipManager = gossipManager;
_keepRunning = new AtomicBoolean(true);
this.gossipManager = gossipManager;
this.keepRunning = new AtomicBoolean(true);
}
@Override
public void run() {
while (_keepRunning.get()) {
while (keepRunning.get()) {
try {
TimeUnit.MILLISECONDS.sleep(_gossipManager.getSettings().getGossipInterval());
sendMembershipList(_gossipManager.getMyself(), _gossipManager.getMemberList());
TimeUnit.MILLISECONDS.sleep(gossipManager.getSettings().getGossipInterval());
sendMembershipList(gossipManager.getMyself(), gossipManager.getMemberList());
} catch (InterruptedException e) {
GossipService.LOGGER.error(e);
_keepRunning.set(false);
keepRunning.set(false);
}
}
shutdown();
}
public void shutdown() {
_keepRunning.set(false);
keepRunning.set(false);
}
/**

71
src/main/java/com/google/code/gossip/manager/GossipManager.java
View File

@ -43,39 +43,50 @@ import com.google.code.gossip.event.GossipState;
public abstract class GossipManager extends Thread implements NotificationListener {
public static final Logger LOGGER = Logger.getLogger(GossipManager.class);
public static final int MAX_PACKET_SIZE = 102400;
private final ConcurrentSkipListMap<LocalGossipMember, GossipState> members;
private final LocalGossipMember _me;
private final GossipSettings _settings;
private final AtomicBoolean _gossipServiceRunning;
private final Class<? extends PassiveGossipThread> _passiveGossipThreadClass;
private final Class<? extends ActiveGossipThread> _activeGossipThreadClass;
private final LocalGossipMember me;
private final GossipSettings settings;
private final AtomicBoolean gossipServiceRunning;
private final Class<? extends PassiveGossipThread> passiveGossipThreadClass;
private final Class<? extends ActiveGossipThread> activeGossipThreadClass;
private final GossipListener listener;
private ActiveGossipThread activeGossipThread;
private PassiveGossipThread passiveGossipThread;
private ExecutorService _gossipThreadExecutor;
private ExecutorService gossipThreadExecutor;
public GossipManager(Class<? extends PassiveGossipThread> passiveGossipThreadClass,
Class<? extends ActiveGossipThread> activeGossipThreadClass, String cluster, String address, int port,
String id, GossipSettings settings, List<GossipMember> gossipMembers,
GossipListener listener) {
_passiveGossipThreadClass = passiveGossipThreadClass;
_activeGossipThreadClass = activeGossipThreadClass;
_settings = settings;
_me = new LocalGossipMember(cluster, address, port, id, System.currentTimeMillis(), this, settings.getCleanupInterval());
Class<? extends ActiveGossipThread> activeGossipThreadClass, String cluster,
String address, int port, String id, GossipSettings settings,
List<GossipMember> gossipMembers, GossipListener listener) {
this.passiveGossipThreadClass = passiveGossipThreadClass;
this.activeGossipThreadClass = activeGossipThreadClass;
this.settings = settings;
me = new LocalGossipMember(cluster, address, port, id, System.currentTimeMillis(), this,
settings.getCleanupInterval());
members = new ConcurrentSkipListMap<>();
for (GossipMember startupMember : gossipMembers) {
if (!startupMember.equals(_me)) {
LocalGossipMember member = new LocalGossipMember(startupMember.getClusterName(), startupMember.getHost(),
startupMember.getPort(), startupMember.getId(), System.currentTimeMillis(), this,
settings.getCleanupInterval());
if (!startupMember.equals(me)) {
LocalGossipMember member = new LocalGossipMember(startupMember.getClusterName(),
startupMember.getHost(), startupMember.getPort(), startupMember.getId(),
System.currentTimeMillis(), this, settings.getCleanupInterval());
members.put(member, GossipState.UP);
GossipService.LOGGER.debug(member);
}
}
_gossipThreadExecutor = Executors.newCachedThreadPool();
_gossipServiceRunning = new AtomicBoolean(true);
gossipThreadExecutor = Executors.newCachedThreadPool();
gossipServiceRunning = new AtomicBoolean(true);
this.listener = listener;
Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
public void run() {
@ -119,7 +130,7 @@ public abstract class GossipManager extends Thread implements NotificationListen
}
public GossipSettings getSettings() {
return _settings;
return settings;
}
/**
@ -137,7 +148,7 @@ public abstract class GossipManager extends Thread implements NotificationListen
}
public LocalGossipMember getMyself() {
return _me;
return me;
}
public List<LocalGossipMember> getDeadList() {
@ -156,23 +167,23 @@ public abstract class GossipManager extends Thread implements NotificationListen
*/
public void run() {
for (LocalGossipMember member : members.keySet()) {
if (member != _me) {
if (member != me) {
member.startTimeoutTimer();
}
}
try {
passiveGossipThread = _passiveGossipThreadClass.getConstructor(GossipManager.class)
passiveGossipThread = passiveGossipThreadClass.getConstructor(GossipManager.class)
.newInstance(this);
_gossipThreadExecutor.execute(passiveGossipThread);
activeGossipThread = _activeGossipThreadClass.getConstructor(GossipManager.class)
gossipThreadExecutor.execute(passiveGossipThread);
activeGossipThread = activeGossipThreadClass.getConstructor(GossipManager.class)
.newInstance(this);
_gossipThreadExecutor.execute(activeGossipThread);
gossipThreadExecutor.execute(activeGossipThread);
} catch (InstantiationException | IllegalAccessException | IllegalArgumentException
| InvocationTargetException | NoSuchMethodException | SecurityException e1) {
throw new RuntimeException(e1);
}
GossipService.LOGGER.debug("The GossipService is started.");
while (_gossipServiceRunning.get()) {
while (gossipServiceRunning.get()) {
try {
// TODO
TimeUnit.MILLISECONDS.sleep(1);
@ -186,8 +197,8 @@ public abstract class GossipManager extends Thread implements NotificationListen
* Shutdown the gossip service.
*/
public void shutdown() {
_gossipServiceRunning.set(false);
_gossipThreadExecutor.shutdown();
gossipServiceRunning.set(false);
gossipThreadExecutor.shutdown();
if (passiveGossipThread != null) {
passiveGossipThread.shutdown();
}
@ -195,7 +206,7 @@ public abstract class GossipManager extends Thread implements NotificationListen
activeGossipThread.shutdown();
}
try {
boolean result = _gossipThreadExecutor.awaitTermination(1000, TimeUnit.MILLISECONDS);
boolean result = gossipThreadExecutor.awaitTermination(1000, TimeUnit.MILLISECONDS);
if (!result) {
LOGGER.error("executor shutdown timed out");
}

56
src/main/java/com/google/code/gossip/manager/PassiveGossipThread.java
View File

@ -47,38 +47,38 @@ abstract public class PassiveGossipThread implements Runnable {
public static final Logger LOGGER = Logger.getLogger(PassiveGossipThread.class);
/** The socket used for the passive thread of the gossip service. */
private DatagramSocket _server;
private DatagramSocket server;
private final GossipManager _gossipManager;
private final GossipManager gossipManager;
private AtomicBoolean _keepRunning;
private AtomicBoolean keepRunning;
private final String _cluster;
private final String cluster;
public PassiveGossipThread(GossipManager gossipManager) {
_gossipManager = gossipManager;
this.gossipManager = gossipManager;
try {
SocketAddress socketAddress = new InetSocketAddress(_gossipManager.getMyself().getHost(),
_gossipManager.getMyself().getPort());
_server = new DatagramSocket(socketAddress);
SocketAddress socketAddress = new InetSocketAddress(gossipManager.getMyself().getHost(),
gossipManager.getMyself().getPort());
server = new DatagramSocket(socketAddress);
GossipService.LOGGER.debug("Gossip service successfully initialized on port "
+ _gossipManager.getMyself().getPort());
GossipService.LOGGER.debug("I am " + _gossipManager.getMyself());
_cluster = _gossipManager.getMyself().getClusterName();
+ gossipManager.getMyself().getPort());
GossipService.LOGGER.debug("I am " + gossipManager.getMyself());
cluster = gossipManager.getMyself().getClusterName();
} catch (SocketException ex) {
GossipService.LOGGER.warn(ex);
throw new RuntimeException(ex);
}
_keepRunning = new AtomicBoolean(true);
keepRunning = new AtomicBoolean(true);
}
@Override
public void run() {
while (_keepRunning.get()) {
while (keepRunning.get()) {
try {
byte[] buf = new byte[_server.getReceiveBufferSize()];
byte[] buf = new byte[server.getReceiveBufferSize()];
DatagramPacket p = new DatagramPacket(buf, buf.length);
_server.receive(p);
server.receive(p);
int packet_length = 0;
for (int i = 0; i < 4; i++) {
int shift = (4 - 1 - i) * 8;
@ -98,7 +98,8 @@ abstract public class PassiveGossipThread implements Runnable {
JSONArray jsonArray = new JSONArray(receivedMessage);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject memberJSONObject = jsonArray.getJSONObject(i);
if (memberJSONObject.length() == 5 && _cluster.equals(memberJSONObject.get(GossipMember.JSON_CLUSTER))) {
if (memberJSONObject.length() == 5
&& cluster.equals(memberJSONObject.get(GossipMember.JSON_CLUSTER))) {
RemoteGossipMember member = new RemoteGossipMember(
memberJSONObject.getString(GossipMember.JSON_CLUSTER),
memberJSONObject.getString(GossipMember.JSON_HOST),
@ -121,7 +122,7 @@ abstract public class PassiveGossipThread implements Runnable {
}
}
mergeLists(_gossipManager, senderMember, remoteGossipMembers);
mergeLists(gossipManager, senderMember, remoteGossipMembers);
} catch (JSONException e) {
GossipService.LOGGER
.error("The received message is not well-formed JSON. The following message has been dropped:\n"
@ -137,7 +138,7 @@ abstract public class PassiveGossipThread implements Runnable {
} catch (IOException e) {
GossipService.LOGGER.error(e);
System.out.println(e);
_keepRunning.set(false);
keepRunning.set(false);
}
}
shutdown();
@ -145,8 +146,9 @@ abstract public class PassiveGossipThread implements Runnable {
public void shutdown() {
try {
_server.close();
} catch (RuntimeException ex){ }
server.close();
} catch (RuntimeException ex) {
}
}
/**
@ -165,11 +167,9 @@ abstract public class PassiveGossipThread implements Runnable {
}
/*
* random comments
* // Check whether the package is smaller than the maximal packet length.
// A package larger than this would not be possible to be send from a GossipService,
// since this is check before sending the message.
// This could normally only occur when the list of members is very big,
// or when the packet is malformed, and the first 4 bytes is not the right in anymore.
// For this reason we regards the message.
* */
* random comments // Check whether the package is smaller than the maximal packet length. // A
* package larger than this would not be possible to be send from a GossipService, // since this is
* check before sending the message. // This could normally only occur when the list of members is
* very big, // or when the packet is malformed, and the first 4 bytes is not the right in anymore.
* // For this reason we regards the message.
*/

51
src/main/java/com/google/code/gossip/manager/impl/OnlyProcessReceivedPassiveGossipThread.java
View File

@ -48,9 +48,10 @@ public class OnlyProcessReceivedPassiveGossipThread extends PassiveGossipThread
for (LocalGossipMember i : gossipManager.getDeadList()) {
if (i.getId().equals(senderMember.getId())) {
System.out.println(gossipManager.getMyself() + " caught a live one!");
LocalGossipMember newLocalMember = new LocalGossipMember(senderMember.getClusterName(), senderMember.getHost(),
senderMember.getPort(), senderMember.getId(), senderMember.getHeartbeat(),
gossipManager, gossipManager.getSettings().getCleanupInterval());
LocalGossipMember newLocalMember = new LocalGossipMember(senderMember.getClusterName(),
senderMember.getHost(), senderMember.getPort(), senderMember.getId(),
senderMember.getHeartbeat(), gossipManager, gossipManager.getSettings()
.getCleanupInterval());
gossipManager.revivieMember(newLocalMember);
newLocalMember.startTimeoutTimer();
}
@ -68,9 +69,10 @@ public class OnlyProcessReceivedPassiveGossipThread extends PassiveGossipThread
}
} else if (!gossipManager.getMemberList().contains(remoteMember)
&& !gossipManager.getDeadList().contains(remoteMember)) {
LocalGossipMember newLocalMember = new LocalGossipMember(remoteMember.getClusterName(), remoteMember.getHost(),
remoteMember.getPort(), remoteMember.getId(), remoteMember.getHeartbeat(),
gossipManager, gossipManager.getSettings().getCleanupInterval());
LocalGossipMember newLocalMember = new LocalGossipMember(remoteMember.getClusterName(),
remoteMember.getHost(), remoteMember.getPort(), remoteMember.getId(),
remoteMember.getHeartbeat(), gossipManager, gossipManager.getSettings()
.getCleanupInterval());
gossipManager.createOrRevivieMember(newLocalMember);
newLocalMember.startTimeoutTimer();
} else {
@ -78,9 +80,10 @@ public class OnlyProcessReceivedPassiveGossipThread extends PassiveGossipThread
LocalGossipMember localDeadMember = gossipManager.getDeadList().get(
gossipManager.getDeadList().indexOf(remoteMember));
if (remoteMember.getHeartbeat() > localDeadMember.getHeartbeat()) {
LocalGossipMember newLocalMember = new LocalGossipMember(remoteMember.getClusterName(), remoteMember.getHost(),
remoteMember.getPort(), remoteMember.getId(), remoteMember.getHeartbeat(),
gossipManager, gossipManager.getSettings().getCleanupInterval());
LocalGossipMember newLocalMember = new LocalGossipMember(remoteMember.getClusterName(),
remoteMember.getHost(), remoteMember.getPort(), remoteMember.getId(),
remoteMember.getHeartbeat(), gossipManager, gossipManager.getSettings()
.getCleanupInterval());
gossipManager.revivieMember(newLocalMember);
newLocalMember.startTimeoutTimer();
GossipService.LOGGER.debug("Removed remote member " + remoteMember.getAddress()
@ -107,25 +110,19 @@ public class OnlyProcessReceivedPassiveGossipThread extends PassiveGossipThread
}
/**
old comment section:
// If a member is restarted the heartbeat will restart from 1, so we should check
// that here.
// So a member can become from the dead when it is either larger than a previous
// heartbeat (due to network failure)
// or when the heartbeat is 1 (after a restart of the service).
// TODO: What if the first message of a gossip service is sent to a dead node? The
// second member will receive a heartbeat of two.
// TODO: The above does happen. Maybe a special message for a revived member?
// TODO: Or maybe when a member is declared dead for more than
// _settings.getCleanupInterval() ms, reset the heartbeat to 0.
// It will then accept a revived member.
// The above is now handle by checking whether the heartbeat differs
// _settings.getCleanupInterval(), it must be restarted.
* old comment section: // If a member is restarted the heartbeat will restart from 1, so we should
* check // that here. // So a member can become from the dead when it is either larger than a
* previous // heartbeat (due to network failure) // or when the heartbeat is 1 (after a restart of
* the service). // TODO: What if the first message of a gossip service is sent to a dead node? The
* // second member will receive a heartbeat of two. // TODO: The above does happen. Maybe a special
* message for a revived member? // TODO: Or maybe when a member is declared dead for more than //
* _settings.getCleanupInterval() ms, reset the heartbeat to 0. // It will then accept a revived
* member. // The above is now handle by checking whether the heartbeat differs //
* _settings.getCleanupInterval(), it must be restarted.
*/
/*
// The remote member is back from the dead.
// Remove it from the dead list.
// gossipManager.getDeadList().remove(localDeadMember);
// Add it as a new member and add it to the member list.
* // The remote member is back from the dead. // Remove it from the dead list. //
* gossipManager.getDeadList().remove(localDeadMember); // Add it as a new member and add it to the
* member list.
*/

5
src/main/java/com/google/code/gossip/manager/impl/SendMembersActiveGossipThread.java
View File

@ -48,7 +48,7 @@ abstract public class SendMembersActiveGossipThread extends ActiveGossipThread {
return;
}
try (DatagramSocket socket = new DatagramSocket()) {
socket.setSoTimeout(_gossipManager.getSettings().getGossipInterval());
socket.setSoTimeout(gossipManager.getSettings().getGossipInterval());
InetAddress dest = InetAddress.getByName(member.getHost());
JSONArray jsonArray = new JSONArray();
jsonArray.put(me.toJSONObject());
@ -60,8 +60,7 @@ abstract public class SendMembersActiveGossipThread extends ActiveGossipThread {
int packet_length = json_bytes.length;
if (packet_length < GossipManager.MAX_PACKET_SIZE) {
byte[] buf = createBuffer(packet_length, json_bytes);
DatagramPacket datagramPacket = new DatagramPacket(buf, buf.length, dest,
member.getPort());
DatagramPacket datagramPacket = new DatagramPacket(buf, buf.length, dest, member.getPort());
socket.send(datagramPacket);
} else {
GossipService.LOGGER.error("The length of the to be send message is too large ("

6
src/main/java/com/google/code/gossip/manager/random/RandomActiveGossipThread.java
View File

@ -28,11 +28,11 @@ import com.google.code.gossip.manager.impl.SendMembersActiveGossipThread;
public class RandomActiveGossipThread extends SendMembersActiveGossipThread {
/** The Random used for choosing a member to gossip with. */
private final Random _random;
private final Random random;
public RandomActiveGossipThread(GossipManager gossipManager) {
super(gossipManager);
_random = new Random();
random = new Random();
}
/**
@ -44,7 +44,7 @@ public class RandomActiveGossipThread extends SendMembersActiveGossipThread {
protected LocalGossipMember selectPartner(List<LocalGossipMember> memberList) {
LocalGossipMember member = null;
if (memberList.size() > 0) {
int randomNeighborIndex = _random.nextInt(memberList.size());
int randomNeighborIndex = random.nextInt(memberList.size());
member = memberList.get(randomNeighborIndex);
} else {
GossipService.LOGGER.debug("I am alone in this world.");

8
src/main/java/com/google/code/gossip/manager/random/RandomGossipManager.java
View File

@ -26,9 +26,9 @@ import com.google.code.gossip.manager.impl.OnlyProcessReceivedPassiveGossipThrea
import java.util.List;
public class RandomGossipManager extends GossipManager {
public RandomGossipManager(String cluster, String address, int port, String id, GossipSettings settings,
List<GossipMember> gossipMembers, GossipListener listener) {
super(OnlyProcessReceivedPassiveGossipThread.class, RandomActiveGossipThread.class, cluster, address,
port, id, settings, gossipMembers, listener);
public RandomGossipManager(String cluster, String address, int port, String id,
GossipSettings settings, List<GossipMember> gossipMembers, GossipListener listener) {
super(OnlyProcessReceivedPassiveGossipThread.class, RandomActiveGossipThread.class, cluster,
address, port, id, settings, gossipMembers, listener);
}
}