org.apache.hadoop.hbase.wal

Class WALSplitter.EntryBuffers

java.lang.Object

org.apache.hadoop.hbase.wal.WALSplitter.EntryBuffers

Enclosing class:

WALSplitter

public static class WALSplitter.EntryBuffers
extends Object

Class which accumulates edits and separates them into a buffer per region while simultaneously accounting RAM usage. Blocks if the RAM usage crosses a predefined threshold. Writer threads then pull region-specific buffers from this class.

Constructor Summary

Constructors

Constructor and Description
EntryBuffers(WALSplitter.PipelineController controller, long maxHeapUsage)
EntryBuffers(WALSplitter.PipelineController controller, long maxHeapUsage, boolean splitWriterCreationBounded)

Method Summary

Modifier and Type	Method and Description
void	appendEntry(WAL.Entry entry) Append a log entry into the corresponding region buffer.
void	waitUntilDrained()

Methods inherited from class java.lang.Object

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

Constructor Detail

EntryBuffers

public EntryBuffers(WALSplitter.PipelineController controller,
                    long maxHeapUsage)

EntryBuffers

public EntryBuffers(WALSplitter.PipelineController controller,
                    long maxHeapUsage,
                    boolean splitWriterCreationBounded)

Method Detail

appendEntry

public void appendEntry(WAL.Entry entry)
                 throws InterruptedException,
                        IOException

Append a log entry into the corresponding region buffer. Blocks if the total heap usage has crossed the specified threshold.

Throws:

InterruptedException

IOException

waitUntilDrained

public void waitUntilDrained()