org.apache.phoenix.cache

Class ServerCacheClient

java.lang.Object

org.apache.phoenix.cache.ServerCacheClient

public class ServerCacheClient
extends Object

Client for sending cache to each region server

Since:

0.1

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	ServerCacheClient.ServerCache Client-side representation of a server cache.

Field Summary

Fields

Modifier and Type	Field and Description
static int	UUID_LENGTH

Constructor Summary

Constructors

Constructor and Description
ServerCacheClient(PhoenixConnection connection) Construct client used to create a serialized cached snapshot of a table and send it to each region server for caching during hash join processing.

Method Summary

Methods

Modifier and Type	Method and Description
ServerCacheClient.ServerCache	addServerCache(ScanRanges keyRanges, ImmutableBytesWritable cachePtr, ServerCachingProtocol.ServerCacheFactory cacheFactory, TableRef cacheUsingTableRef)
static byte[]	generateId() Create an ID to keep the cached information across other operations independent.
PhoenixConnection	getConnection()
static String	idToString(byte[] uuid)

Methods inherited from class java.lang.Object

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

Field Detail

UUID_LENGTH

public static final int UUID_LENGTH

See Also:

Constant Field Values

Constructor Detail

ServerCacheClient

public ServerCacheClient(PhoenixConnection connection)

Construct client used to create a serialized cached snapshot of a table and send it to each region server for caching during hash join processing.

Parameters:

connection - the client connection TODO: instead of minMaxKeyRange, have an interface for iterating through ranges as we may be sending to servers when we don't have to if the min is in first region and max is in last region, especially for point queries.

Method Detail

getConnection

public PhoenixConnection getConnection()

addServerCache

public ServerCacheClient.ServerCache addServerCache(ScanRanges keyRanges,
                                           ImmutableBytesWritable cachePtr,
                                           ServerCachingProtocol.ServerCacheFactory cacheFactory,
                                           TableRef cacheUsingTableRef)
                                             throws SQLException

Throws:

SQLException

generateId

public static byte[] generateId()

Create an ID to keep the cached information across other operations independent. Using simple long random number, since the length of time we need this to be unique is very limited.

idToString

public static String idToString(byte[] uuid)