/**
* This method blocks until the connection to ZK succeeds. Use with caution. The block will
* timeout after the connection timeout (as passed to the constructor) has elapsed
*
* @return true if the connection succeeded, false if not
* @throws InterruptedException interrupted while waiting
*/
public boolean blockUntilConnectedOrTimedOut() throws InterruptedException {
Preconditions.checkArgument(started.get());
log.debug("blockUntilConnectedOrTimedOut() start");
TimeTrace trace = startTracer("blockUntilConnectedOrTimedOut");
internalBlockUntilConnectedOrTimedOut();
trace.commit();
boolean localIsConnected = state.isConnected();
log.debug("blockUntilConnectedOrTimedOut() end. isConnected: " + localIsConnected);
return localIsConnected;
}
/**
* Convenience utility: creates a retry loop calling the given proc and retrying if needed
*
* @param client Zookeeper
* @param proc procedure to call with retry
* @param <T> return type
* @return procedure result
* @throws Exception any non-retriable errors
*/
public static <T> T callWithRetry(CuratorZookeeperClient client, Callable<T> proc)
throws Exception {
T result = null;
RetryLoop retryLoop = client.newRetryLoop();
while (retryLoop.shouldContinue()) {
try {
client.internalBlockUntilConnectedOrTimedOut();
result = proc.call();
retryLoop.markComplete();
} catch (Exception e) {
retryLoop.takeException(e);
}
}
return result;
}
