Package org.apache.bookkeeper.zookeeper

Class ExponentialBackoffRetryPolicy

java.lang.Object

org.apache.bookkeeper.zookeeper.ExponentialBackoffRetryPolicy

All Implemented Interfaces:

RetryPolicy

Direct Known Subclasses:

BoundExponentialBackoffRetryPolicy

public class ExponentialBackoffRetryPolicy
extends java.lang.Object
implements RetryPolicy

A retry policy implementation that backoff retries exponentially.

Constructor Summary

Constructors

Constructor	Description
ExponentialBackoffRetryPolicy(long baseBackoffTime, int maxRetries)

Method Summary

Modifier and Type	Method	Description
boolean	allowRetry(int retryCount, long elapsedRetryTime)	Called when retrying an operation failed for some reason.
long	nextRetryWaitTime(int retryCount, long elapsedRetryTime)	Called before making an attempt to retry a failed operation.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExponentialBackoffRetryPolicy

public ExponentialBackoffRetryPolicy(long baseBackoffTime,
                                     int maxRetries)

Method Detail

allowRetry

public boolean allowRetry(int retryCount,
                          long elapsedRetryTime)

Description copied from interface: RetryPolicy

Called when retrying an operation failed for some reason. Return true if another attempt is allowed to make.

Specified by:

allowRetry in interface RetryPolicy

Parameters:

retryCount - The number of times retried so far (1 for the first time).

elapsedRetryTime - The elapsed time since the operation attempted. (in milliseconds)

Returns:

true if anther attempt is allowed to make. otherwise, false.

nextRetryWaitTime

public long nextRetryWaitTime(int retryCount,
                              long elapsedRetryTime)

Description copied from interface: RetryPolicy

Called before making an attempt to retry a failed operation. Return 0 if an attempt needs to be made immediately.

Specified by:

nextRetryWaitTime in interface RetryPolicy

Parameters:

retryCount - The number of times retried so far (0 for the first time).

elapsedRetryTime - The elapsed time since the operation attempted. (in milliseconds)

Returns:

the elapsed time that the attempt needs to wait before retrying. (in milliseconds)