org.apache.beam.sdk.util

Interface BackOff

public interface BackOff

Back-off policy when retrying an operation.

Note: This interface is copied from Google API client library to avoid its dependency.

Field Summary

Fields

Modifier and Type	Field and Description
static long	STOP Indicates that no more retries should be made for use in nextBackOffMillis().
static BackOff	STOP_BACKOFF Fixed back-off policy that always returns #STOP for nextBackOffMillis(), meaning that the operation should not be retried.
static BackOff	ZERO_BACKOFF Fixed back-off policy whose back-off time is always zero, meaning that the operation is retried immediately without waiting.

Method Summary

Modifier and Type	Method and Description
long	nextBackOffMillis() Gets the number of milliseconds to wait before retrying the operation or STOP to indicate that no retries should be made.
void	reset() Reset to initial state.

Field Detail

STOP

static final long STOP

Indicates that no more retries should be made for use in nextBackOffMillis().

See Also:

Constant Field Values

ZERO_BACKOFF

static final BackOff ZERO_BACKOFF

Fixed back-off policy whose back-off time is always zero, meaning that the operation is retried immediately without waiting.

STOP_BACKOFF

static final BackOff STOP_BACKOFF

Fixed back-off policy that always returns #STOP for nextBackOffMillis(), meaning that the operation should not be retried.

Method Detail

reset

void reset()
    throws java.io.IOException

Reset to initial state.

Throws:

java.io.IOException

nextBackOffMillis

long nextBackOffMillis()
                throws java.io.IOException

Gets the number of milliseconds to wait before retrying the operation or STOP to indicate that no retries should be made.

Example usage:

 long backOffMillis = backoff.nextBackOffMillis();
 if (backOffMillis == Backoff.STOP) {
 // do not retry operation
 } else {
 // sleep for backOffMillis milliseconds and retry operation
 }
 

Throws:

java.io.IOException