@Override
public void process(WatchedEvent event) {
switch (event.getType()) {
case NodeChildrenChanged:
// ring group was added OR currentversion was set for the first time
LOG.debug("NodeChildrenChanged fired");
fireListener();
break;
case NodeDataChanged:
// one of the versions was updated
LOG.debug("NodeDataChanged fired");
fireListener();
break;
case NodeDeleted:
// updatingToVersion was whacked
LOG.debug("NodeDeleted fired");
fireListener();
break;
default:
LOG.debug("Unexpected event type " + event.getType());
}
}
public void process(WatchedEvent event) {
if (event.getType() == EventType.NodeDataChanged) {
displayConfig();
} else {
System.out.println("数据没有发生改变，而是" + event.getType() + ":" + event.getState());
}
}
@Override
public void process(WatchedEvent event) {
if (event.getType() == EventType.NodeDataChanged) {
String keyPath = event.getPath();
String key = keyPath.substring(keyPath.lastIndexOf("/") + 1);
String value = "";
try {
value = pigeonCache.getServiceValue(key);
} catch (LionException e) {
logger.error(e.getMessage(), e);
}
logger.info("Pigeon Cache Key Change! Key: " + key + " Value: " + value);
if (pigeonCache.getService().containsKey(key)) {
List<String[]> hostDetail = pigeonCache.getServiceIpPortWeight(value);
pigeonCache
.getServiceChange()
.onServiceHostChange(this.replaceServiceName(key), hostDetail);
}
} else {
// 重新监听节点信息
logger.info("Delete The Node " + event.getType() + " " + event.getPath());
String key = event.getPath().substring(event.getPath().lastIndexOf("/") + 1);
try {
pigeonCache.getServiceValue(key);
} catch (LionException e) {
logger.error(e.getMessage(), e);
}
}
}
@Override
public void process(WatchedEvent event) throws Exception {
if (event.getType() == EventType.NodeDeleted) {
createNode();
} else if (event.getType() == EventType.NodeDataChanged) {
watchNode();
}
}
@Override
public void process(WatchedEvent event) {
if (LOG.isDebugEnabled()) {
LOG.debug(
"Received Zookeeper Event, "
+ "type="
+ event.getType()
+ ", "
+ "state="
+ event.getState()
+ ", "
+ "path="
+ event.getPath());
}
switch (event.getType()) {
case None:
{
if (event.getState() == KeeperState.SyncConnected) {
latch.countDown();
}
}
case NodeCreated:
{
for (ZkListener listener : this.listeners) {
listener.nodeCreated(event.getPath());
}
break;
}
case NodeDeleted:
{
for (ZkListener listener : this.listeners) {
listener.nodeDeleted(event.getPath());
}
break;
}
case NodeDataChanged:
{
for (ZkListener listener : this.listeners) {
listener.nodeDataChanged(event.getPath());
}
break;
}
case NodeChildrenChanged:
{
for (ZkListener listener : this.listeners) {
listener.nodeChildrenChanged(event.getPath());
}
break;
}
}
}
@Override
public void process(WatchedEvent event) {
if (event.getType() == EventType.NodeChildrenChanged) {
abortX();
} else if (event.getType() == EventType.NodeCreated) {
// if one votes 'ABORT', abort the X
// if all vote 'PREPARE' commit the X
// else continue watching
commitX();
}
}
@Override
public void process(WatchedEvent event) {
// this lock is important so that when changes start happening, we
// won't run into any concurrency issues
synchronized (WatchedNode.this) {
if (!cancelled) {
if (event.getState() == KeeperState.SyncConnected) {
// If connected update data and notify listeners
try {
if (event.getType().equals(Event.EventType.NodeCreated)) {
watchForData();
} else if (event.getType().equals(Event.EventType.NodeDeleted)) {
// Previous version notified is null, and we will notify with null
previousVersion = null;
watchForCreation();
} else if (event.getType().equals(Event.EventType.NodeDataChanged)) {
watchForData();
}
} catch (KeeperException e) {
LOG.error("Exception while trying to update our cached value for " + nodePath, e);
} catch (InterruptedException e) {
if (LOG.isTraceEnabled()) {
LOG.trace(
"Interrupted while trying to update our cached value for " + nodePath, e);
}
}
// Notify of new value if either we didn't notify of any value, or the node has
// changed
long currentVersion = stat.getCtime() + stat.getMtime();
if (previousVersion == null || !previousVersion.equals(currentVersion)) {
try {
synchronized (listeners) {
for (WatchedNodeListener<T> listener : listeners) {
listener.onWatchedNodeChange(value);
}
}
} finally {
previousVersion = currentVersion;
}
}
} else {
// Not sync connected, do nothing
if (LOG.isDebugEnabled()) {
LOG.debug("Not sync connected anymore for watched node " + nodePath);
}
}
}
}
}
public synchronized void process(WatchedEvent event) {
logger.info(getClass().getName() + event.getPath());
logger.info(getClass().getName() + event.getType());
synchronized (mutex) {
switch (event.getState()) {
case SyncConnected:
mutex.notify();
}
switch (event.getType()) {
case NodeCreated:
mutex.notify();
break;
}
}
}
/** Process the {@link WatchedEvent} for a node which represents an {@link AuthenticationKey} */
void processChildNode(WatchedEvent event) throws KeeperException, InterruptedException {
final String path = event.getPath();
switch (event.getType()) {
case NodeDeleted:
// Key expired
if (null == path) {
log.error("Got null path for NodeDeleted event");
return;
}
// Pull off the base ZK path and the '/' separator
String childName = path.substring(baseNode.length() + 1);
secretManager.removeKey(Integer.parseInt(childName));
break;
case None:
// Not connected, don't care. We'll update when we're reconnected
break;
case NodeCreated:
// New key created
if (null == path) {
log.error("Got null path for NodeCreated event");
return;
}
// Get the data and reset the watcher
AuthenticationKey key = deserializeKey(zk.getData(path, this, null));
log.debug("Adding AuthenticationKey with keyId {}", key.getKeyId());
secretManager.addKey(key);
break;
case NodeDataChanged:
// Key changed, could happen on restart after not running Accumulo.
if (null == path) {
log.error("Got null path for NodeDataChanged event");
return;
}
// Get the data and reset the watcher
AuthenticationKey newKey = deserializeKey(zk.getData(path, this, null));
// Will overwrite the old key if one exists
secretManager.addKey(newKey);
break;
case NodeChildrenChanged:
// no children for the children..
log.warn("Unexpected NodeChildrenChanged event for authentication key node {}", path);
break;
default:
log.warn("Unsupported event type: {}", event.getType());
break;
}
}
public void process(WatchedEvent event) {
String path = event.getPath();
if (event.getType() == Event.EventType.None) {
// We are are being told that the state of the
// connection has changed
switch (event.getState()) {
case SyncConnected:
// In this particular example we don't need to do anything
// here - watches are automatically re-registered with
// server and any watches triggered while the client was
// disconnected will be delivered (in order of course)
break;
case Expired:
// It's all over
dead = true;
listener.closing(KeeperException.Code.SessionExpired);
break;
}
} else {
if (path != null && path.equals(znode)) {
// Something has changed on the node, let's find out
zk.exists(znode, true, this, null);
}
}
if (chainedWatcher != null) {
chainedWatcher.process(event);
}
}
public void process(WatchedEvent event) {
LOGGER.debug(
"Watcher fired on path: "
+ event.getPath()
+ " state: "
+ event.getState()
+ " type "
+ event.getType());
latchIfNoChange.countDown();
// ignore any children except valid children for a queue
if (keyHandler.hasValidName(ZkUtils.getPathEnd(event.getPath()))) {
if (highestPriorityChanged == null) {
highestPriorityChanged = keyHandler.getPriority(event.getPath());
} else {
synchronized (highestPriorityChanged) {
PRIORITY changedPriority = keyHandler.getPriority(event.getPath());
if (changedPriority != null && changedPriority.compareTo(highestPriorityChanged) < 0) {
highestPriorityChanged = changedPriority;
}
}
}
}
}
public void process(WatchedEvent event) {
LOG.info("Event:" + event.getState() + " " + event.getType() + " " + event.getPath());
if (event.getState() == KeeperState.SyncConnected
&& startSignal != null
&& startSignal.getCount() > 0) {
startSignal.countDown();
}
}
/** @see org.apache.zookeeper.Watcher#process(org.apache.zookeeper.WatchedEvent) */
@Override
public synchronized void process(WatchedEvent event) {
EventType type = event.getType();
if (type.equals(EventType.NodeDeleted)) {
LOG.debug("Master address ZNode deleted, notifying waiting masters");
notifyAll();
}
}
@Override
public void process(WatchedEvent event) {
if (event.getPath().equals(root + "/start") && event.getType() == Event.EventType.NodeCreated) {
System.out.println("得到通知");
super.process(event);
doAction();
}
}
@Override
public void process(WatchedEvent watchedEvent) {
Event.EventType type = watchedEvent.getType();
LOG.info("Got event " + type + " with path " + watchedEvent.getPath());
if (type.equals(Event.EventType.NodeDataChanged)) {
readReplicationStateZnode();
}
}
@Override
public void process(WatchedEvent event) {
// Look for a NodeCreate event on /demo
if (event.getType() == Watcher.Event.EventType.NodeCreated) {
if (event.getPath().equals(NODE)) {
_sawDemo = true;
}
}
}
@Override
public void process(WatchedEvent event) {
LOG.debug("Received watched event {} from zookeeper based ledger manager.", event);
if (Event.EventType.None == event.getType()) {
if (Event.KeeperState.Expired == event.getState()) {
LOG.info("ZooKeeper client expired on ledger manager.");
Set<Long> keySet = new HashSet<Long>(listeners.keySet());
for (Long lid : keySet) {
scheduler.submit(new ReadLedgerMetadataTask(lid));
LOG.info("Re-read ledger metadata for {} after zookeeper session expired.", lid);
}
}
return;
}
String path = event.getPath();
if (null == path) {
return;
}
final long ledgerId;
try {
ledgerId = getLedgerId(event.getPath());
} catch (IOException ioe) {
LOG.info("Received invalid ledger path {} : ", event.getPath(), ioe);
return;
}
switch (event.getType()) {
case NodeDeleted:
Set<LedgerMetadataListener> listenerSet = listeners.remove(ledgerId);
if (null != listenerSet) {
LOG.debug("Removed ledger metadata listeners on ledger {} : {}", ledgerId, listenerSet);
} else {
LOG.debug(
"No ledger metadata listeners to remove from ledger {} after it's deleted.",
ledgerId);
}
break;
case NodeDataChanged:
new ReadLedgerMetadataTask(ledgerId).run();
break;
default:
LOG.debug("Received event {} on {}.", event.getType(), event.getPath());
break;
}
}
@Override
public void process(WatchedEvent event) {
// 已经连上
if (event.getState() == Event.KeeperState.SyncConnected) {
connectedSignal.countDown(); // 结束一个等待CountDownLatch
log.info("服务器已经连上！");
}
log.info("收到[{}]事件通知,触发[{}]事件!", event.getState(), event.getType());
}
public void process(WatchedEvent event) {
if (event.getType() == Event.EventType.NodeChildrenChanged) {
LOG.debug("Running children changed [" + event.getPath() + "]");
try {
getZkRunning();
} catch (Exception e) {
e.printStackTrace();
LOG.error(e);
}
} else if (event.getType() == Event.EventType.NodeDeleted) {
String znodePath = event.getPath();
LOG.debug("Running znode deleted [" + znodePath + "]");
try {
restartServer(znodePath);
} catch (Exception e) {
e.printStackTrace();
LOG.error(e);
}
}
}
@Override
public void process(WatchedEvent event) {
// session events are not change events, and do not remove the watcher
if (Event.EventType.None.equals(event.getType())) {
return;
}
// If latchEventType is not null, only fire if the type matches
LOG.debug(
"{} fired on path {} state {} latchEventType {}",
event.getType(),
event.getPath(),
event.getState(),
latchEventType);
if (latchEventType == null || event.getType() == latchEventType) {
synchronized (lock) {
this.event = event;
lock.notifyAll();
}
}
}
@Override
public void process(WatchedEvent event) {
log.debug("event " + event.getPath() + " " + event.getType() + " " + event.getState());
if (event.getState() == KeeperState.Expired) {
log.warn("Trace server lost zookeeper registration at " + event.getPath());
server.stop();
} else if (event.getType() == EventType.NodeDeleted) {
log.warn("Trace server zookeeper entry lost " + event.getPath());
server.stop();
}
if (event.getPath() != null) {
try {
if (ZooReaderWriter.getInstance().exists(event.getPath(), this)) return;
} catch (Exception ex) {
log.error(ex, ex);
}
log.warn("Trace server unable to reset watch on zookeeper registration");
server.stop();
}
}
@Override
public void process(WatchedEvent event) {
boolean needsRefresh = false;
if (event.getType() == Event.EventType.None
&& event.getState() == Event.KeeperState.SyncConnected) {
needsRefresh = true;
} else if (NodeChildrenChanged.equals(event.getType())
&& event.getPath().equals(REPOSITORY_COLLECTION_PATH)) {
needsRefresh = true;
} else if (NodeDataChanged.equals(event.getType())
&& event.getPath().startsWith(REPOSITORY_COLLECTION_PATH_SLASH)) {
needsRefresh = true;
}
if (needsRefresh) {
try {
refresh();
} catch (Throwable t) {
log.error("Repository Model: error handling event from ZooKeeper. Event: " + event, t);
}
}
}
@Override
public void process(WatchedEvent event) {
if (event.getType() == Event.EventType.None && event.getState() == KeeperState.Expired) {
try {
reconnectToZookeeper(this.zookeeper);
} catch (Exception e) {
logger.warn("Reconnect to zookeeper cluster failed while session expired.", e);
}
}
if (this.watcher != null) {
this.watcher.process(event);
}
}
@Override
public synchronized void process(WatchedEvent watchedEvent) {
// If we lose synchronization, stop waiting
if (watchedEvent.getState() != Event.KeeperState.SyncConnected) {
waiting = false;
} else {
// If the node has been created, stop waiting
if (watchedEvent.getType() == Event.EventType.NodeCreated) {
waiting = false;
}
}
// Notify threads to check waiting flag
notifyAll();
}
@Override
public void process(WatchedEvent event) {
if (!asnycConnection && event.getState() == Event.KeeperState.SyncConnected) {
connectionLock.release(); // 连接成功
} else if (event.getState() == Event.KeeperState.Disconnected) { // 连接断开
log.warn("zookeeper 连接断开......");
} else if (event.getState() == Event.KeeperState.Expired) { // 连接超时
log.warn("zookeeper session timeout......");
try {
zkClient.reconnect();
process.relisten();
process.recreate();
} catch (Exception e) {
log.error("reconnection to zookeeper error.", e);
}
}
if (event.getType() == Event.EventType.NodeChildrenChanged) { // 子节点变化
process.clientNodeChanged(event.getPath());
} else if (event.getType() == Event.EventType.NodeDataChanged) { // 节点数据变化
process.nodeDataChanged(event.getPath());
}
}
public void process(WatchedEvent event) {
// lets either become the leader or watch the new/updated node
LOG.debug(
"Watcher fired on path: "
+ event.getPath()
+ " state: "
+ event.getState()
+ " type "
+ event.getType());
try {
lock();
} catch (Exception e) {
LOG.warn("Failed to acquire lock: " + e, e);
}
}
/**
* Process the {@link WatchedEvent} for the base znode that the {@link AuthenticationKey}s are
* stored in.
*/
void processBaseNode(WatchedEvent event) throws KeeperException, InterruptedException {
switch (event.getType()) {
case NodeDeleted:
// The parent node was deleted, no children are possible, remove all keys
log.debug("Parent ZNode was deleted, removing all AuthenticationKeys");
secretManager.removeAllKeys();
break;
case None:
// Not connected, don't care
break;
case NodeCreated: // intentional fall-through to NodeChildrenChanged
case NodeChildrenChanged:
// Process each child, and reset the watcher on the parent node. We know that the node
// exists
updateAuthKeys(event.getPath());
break;
case NodeDataChanged:
// The data on the parent changed. We aren't storing anything there so it's a noop
break;
default:
log.warn("Unsupported event type: {}", event.getType());
break;
}
}
/**
* @see org.apache.zookeeper.Watcher#process(org.apache.zookeeper.WatchedEvent)
* <p>watch for session changes
*/
@Override
public void process(WatchedEvent event) {
if (event.getType() != EventType.None) return;
switch (event.getState()) {
case SyncConnected:
break;
case Expired:
break;
case Disconnected:
break;
default:
break;
}
}
@Override
public void process(WatchedEvent event) {
if (EventType.None == event.getType()) {
switch (event.getState()) {
case Disconnected: // Intentional fall through of case
case Expired: // ZooReader is handling the Expiration of the original ZooKeeper object for
// us
log.debug("ZooKeeper connection disconnected, clearing secret manager");
secretManager.removeAllKeys();
break;
case SyncConnected:
log.debug("ZooKeeper reconnected, updating secret manager");
try {
updateAuthKeys();
} catch (KeeperException | InterruptedException e) {
log.error("Failed to update secret manager after ZooKeeper reconnect");
}
break;
default:
log.warn("Unhandled: " + event);
}
// Nothing more to do for EventType.None
return;
}
String path = event.getPath();
if (null == path) {
return;
}
if (!path.startsWith(baseNode)) {
log.info("Ignoring event for path: {}", path);
return;
}
try {
if (path.equals(baseNode)) {
processBaseNode(event);
} else {
processChildNode(event);
}
} catch (KeeperException | InterruptedException e) {
log.error("Failed to communicate with ZooKeeper", e);
}
}
public void process(WatchedEvent watchedEvent) {
try {
Closure callback = null;
switch (watchedEvent.getType()) {
case NodeChildrenChanged:
if (null != onNodeChildrenChanged) {
callback = onNodeChildrenChanged;
} else {
callback = onEvent;
}
break;
case NodeCreated:
if (null != onNodeCreated) {
callback = onNodeCreated;
} else {
callback = onEvent;
}
break;
case NodeDeleted:
if (null != onNodeDeleted) {
callback = onNodeDeleted;
} else {
callback = onEvent;
}
break;
case NodeDataChanged:
if (null != onDataChanged) {
callback = onDataChanged;
} else {
callback = onEvent;
}
break;
case None:
if (null != onEvent) {
callback = onEvent;
}
}
if (null != callback) {
callback.call(watchedEvent);
} else {
log.warn("No callbacks defined to accept event: " + watchedEvent);
}
} catch (Throwable t) {
log.debug(t.getMessage());
}
}
