org.apache.nifi.distributed.cache.server.map

Class PersistentMapCache

java.lang.Object

org.apache.nifi.distributed.cache.server.map.PersistentMapCache

All Implemented Interfaces:

MapCache

public class PersistentMapCache
extends Object
implements MapCache

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	PersistentMapCache.MapWaliRecord
private static class	PersistentMapCache.Serde

Field Summary

Fields

Modifier and Type	Field and Description
private AtomicLong	modifications
private WriteAheadRepository<PersistentMapCache.MapWaliRecord>	wali
private MapCache	wrapped

Constructor Summary

Constructors

Constructor and Description
PersistentMapCache(String serviceIdentifier, File persistencePath, MapCache cacheToWrap)

Method Summary

Modifier and Type	Method and Description
boolean	containsKey(ByteBuffer key)
ByteBuffer	get(ByteBuffer key)
MapPutResult	put(ByteBuffer key, ByteBuffer value)
MapPutResult	putIfAbsent(ByteBuffer key, ByteBuffer value)
ByteBuffer	remove(ByteBuffer key)
(package private) void	restore()
void	shutdown()

Methods inherited from class java.lang.Object

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

Field Detail

wrapped

private final MapCache wrapped

wali

private final WriteAheadRepository<PersistentMapCache.MapWaliRecord> wali

modifications

private final AtomicLong modifications

Constructor Detail

PersistentMapCache

public PersistentMapCache(String serviceIdentifier,
                          File persistencePath,
                          MapCache cacheToWrap)
                   throws IOException

Throws:

IOException

Method Detail

restore

void restore()
      throws IOException

Throws:

IOException

putIfAbsent

public MapPutResult putIfAbsent(ByteBuffer key,
                                ByteBuffer value)
                         throws IOException

Specified by:

putIfAbsent in interface MapCache

Throws:

IOException

put

public MapPutResult put(ByteBuffer key,
                        ByteBuffer value)
                 throws IOException

Specified by:

put in interface MapCache

Throws:

IOException

containsKey

public boolean containsKey(ByteBuffer key)
                    throws IOException

Specified by:

containsKey in interface MapCache

Throws:

IOException

get

public ByteBuffer get(ByteBuffer key)
               throws IOException

Specified by:

get in interface MapCache

Throws:

IOException

remove

public ByteBuffer remove(ByteBuffer key)
                  throws IOException

Specified by:

remove in interface MapCache

Throws:

IOException

shutdown

public void shutdown()
              throws IOException

Specified by:

shutdown in interface MapCache

Throws:

IOException