public void createPersistent(final String path, final byte[] data)
throws KeeperException, InterruptedException {
RetryCounter retryCounter = retryCounterFactory.create();
while (true) {
try {
zk.create(path, data, Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
return;
} catch (KeeperException e) {
switch (e.code()) {
case CONNECTIONLOSS:
case OPERATIONTIMEOUT:
LOG.warn("Possibly transient ZooKeeper exception: " + e);
if (!retryCounter.shouldRetry()) {
LOG.error(
"ZooKeeper create failed after " + retryCounter.getMaxRetries() + " retries");
throw e;
}
break;
default:
throw e;
}
}
retryCounter.sleepUntilNextRetry();
retryCounter.useRetry();
}
}
public byte[] getData(String path, Watcher watcher, Stat stat)
throws KeeperException, InterruptedException {
RetryCounter retryCounter = retryCounterFactory.create();
while (true) {
try {
// 120227 by DaeJin Choi - What about Metadata of data ( ex: Magic
// number and so on )
return zk.getData(path, watcher, stat);
} catch (KeeperException e) {
switch (e.code()) {
case CONNECTIONLOSS:
case OPERATIONTIMEOUT:
LOG.warn("Possibly transient ZooKeeper exception: " + e);
if (!retryCounter.shouldRetry()) {
LOG.error(
"ZooKeeper getData failed after " + retryCounter.getMaxRetries() + " retries");
throw e;
}
break;
default:
throw e;
}
}
retryCounter.sleepUntilNextRetry();
retryCounter.useRetry();
}
}
public List<String> getChildren(String path) throws KeeperException, InterruptedException {
RetryCounter retryCounter = retryCounterFactory.create();
while (true) {
try {
return zk.getChildren(path, true);
} catch (KeeperException e) {
switch (e.code()) {
case CONNECTIONLOSS:
case OPERATIONTIMEOUT:
LOG.warn("Possibly transient ZooKeeper exception: " + e);
if (!retryCounter.shouldRetry()) {
LOG.error(
"ZooKeeper getChildren failed after "
+ retryCounter.getMaxRetries()
+ " retries");
throw e;
}
break;
default:
throw e;
}
}
retryCounter.sleepUntilNextRetry();
retryCounter.useRetry();
}
}
public String createEphemeralSequential(final String path, final byte[] data) throws Exception {
RetryCounter retryCounter = retryCounterFactory.create();
while (true) {
try {
return zk.create(path, data, Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL_SEQUENTIAL);
} catch (KeeperException e) {
switch (e.code()) {
case CONNECTIONLOSS:
case OPERATIONTIMEOUT:
LOG.warn("Possibly transient ZooKeeper exception: " + e);
if (!retryCounter.shouldRetry()) {
LOG.error(
"ZooKeeper create failed after " + retryCounter.getMaxRetries() + " retries");
throw e;
}
break;
default:
throw e;
}
}
retryCounter.sleepUntilNextRetry();
retryCounter.useRetry();
}
}