org.apache.hadoop.hbase.regionserver

Class HRegion.FlushResultImpl

java.lang.Object

org.apache.hadoop.hbase.regionserver.HRegion.FlushResultImpl

All Implemented Interfaces:

HRegion.FlushResult

Enclosing class:

HRegion

public static class HRegion.FlushResultImpl
extends Object
implements HRegion.FlushResult

Objects from this class are created when flushing to describe all the different states that that method ends up in. The Result enum describes those states. The sequence id should only be specified if the flush was successful, and the failure message should only be specified if it didn't flush.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.regionserver.HRegion.FlushResult

HRegion.FlushResult.Result

Field Summary

Fields

Modifier and Type	Field and Description
(package private) String	failureReason
(package private) long	flushSequenceId
(package private) HRegion.FlushResult.Result	result
(package private) boolean	wroteFlushWalMarker

Constructor Summary

Constructors

Constructor and Description
FlushResultImpl(HRegion.FlushResult.Result result, long flushSequenceId) Convenience constructor to use when the flush is successful, the failure message is set to null.
FlushResultImpl(HRegion.FlushResult.Result result, long flushSequenceId, String failureReason, boolean wroteFlushMarker) Constructor with all the parameters.
FlushResultImpl(HRegion.FlushResult.Result result, String failureReason, boolean wroteFlushMarker) Convenience constructor to use when we cannot flush.

Method Summary

Modifier and Type	Method and Description
HRegion.FlushResult.Result	getResult()
boolean	isCompactionNeeded() Convenience method, the equivalent of checking if result is FLUSHED_COMPACTION_NEEDED.
boolean	isFlushSucceeded() Convenience method, the equivalent of checking if result is FLUSHED_NO_COMPACTION_NEEDED or FLUSHED_NO_COMPACTION_NEEDED.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

result

final HRegion.FlushResult.Result result

failureReason

final String failureReason

flushSequenceId

final long flushSequenceId

wroteFlushWalMarker

final boolean wroteFlushWalMarker

Constructor Detail

FlushResultImpl

FlushResultImpl(HRegion.FlushResult.Result result,
                long flushSequenceId)

Convenience constructor to use when the flush is successful, the failure message is set to null.

Parameters:

result - Expecting FLUSHED_NO_COMPACTION_NEEDED or FLUSHED_COMPACTION_NEEDED.

flushSequenceId - Generated sequence id that comes right after the edits in the memstores.

FlushResultImpl

FlushResultImpl(HRegion.FlushResult.Result result,
                String failureReason,
                boolean wroteFlushMarker)

Convenience constructor to use when we cannot flush.

Parameters:

result - Expecting CANNOT_FLUSH_MEMSTORE_EMPTY or CANNOT_FLUSH.

failureReason - Reason why we couldn't flush.

FlushResultImpl

FlushResultImpl(HRegion.FlushResult.Result result,
                long flushSequenceId,
                String failureReason,
                boolean wroteFlushMarker)

Constructor with all the parameters.

Parameters:

result - Any of the Result.

flushSequenceId - Generated sequence id if the memstores were flushed else -1.

failureReason - Reason why we couldn't flush, or null.

Method Detail

isFlushSucceeded

public boolean isFlushSucceeded()

Convenience method, the equivalent of checking if result is FLUSHED_NO_COMPACTION_NEEDED or FLUSHED_NO_COMPACTION_NEEDED.

Specified by:

isFlushSucceeded in interface HRegion.FlushResult

Returns:

true if the memstores were flushed, else false.

isCompactionNeeded

public boolean isCompactionNeeded()

Convenience method, the equivalent of checking if result is FLUSHED_COMPACTION_NEEDED.

Specified by:

isCompactionNeeded in interface HRegion.FlushResult

Returns:

True if the flush requested a compaction, else false (doesn't even mean it flushed).

toString

public String toString()

Overrides:

toString in class Object

getResult

public HRegion.FlushResult.Result getResult()

Specified by:

getResult in interface HRegion.FlushResult

Returns:

the detailed result code