org.apache.cassandra.service
Class MigrationManager

java.lang.Object
  org.apache.cassandra.service.MigrationManager

All Implemented Interfaces:

IEndpointStateChangeSubscriber

public class MigrationManager
extends java.lang.Object
implements IEndpointStateChangeSubscriber

Constructor Summary

MigrationManager()

Method Summary

static void	announce(java.util.Collection<RowMutation> schema) actively announce a new version to active hosts via rpc
static java.util.Collection<RowMutation>	deserializeMigrationMessage(byte[] data, int version) Deserialize migration message considering data compatibility starting from version 1.1
static boolean	isReadyForBootstrap()
void	onAlive(java.net.InetAddress endpoint, EndpointState state)
void	onChange(java.net.InetAddress endpoint, ApplicationState state, VersionedValue value)
void	onDead(java.net.InetAddress endpoint, EndpointState state)
void	onJoin(java.net.InetAddress endpoint, EndpointState epState) Use to inform interested parties about the change in the state for specified endpoint
void	onRemove(java.net.InetAddress endpoint)
void	onRestart(java.net.InetAddress endpoint, EndpointState state) Called whenever a node is restarted.
static void	passiveAnnounce(java.util.UUID version) Announce my version passively over gossip.
static void	rectifySchema(java.util.UUID theirVersion, java.net.InetAddress endpoint)
static byte[]	serializeSchema(java.util.Collection<RowMutation> schema, int version) Serialize given row mutations into raw bytes

Methods inherited from class java.lang.Object

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

Constructor Detail

MigrationManager

public MigrationManager()

Method Detail

onJoin

public void onJoin(java.net.InetAddress endpoint,
                   EndpointState epState)

Description copied from interface: IEndpointStateChangeSubscriber

Use to inform interested parties about the change in the state for specified endpoint

Specified by:

onJoin in interface IEndpointStateChangeSubscriber

Parameters:

endpoint - endpoint for which the state change occurred.

epState - state that actually changed for the above endpoint.

onChange

public void onChange(java.net.InetAddress endpoint,
                     ApplicationState state,
                     VersionedValue value)

Specified by:

onChange in interface IEndpointStateChangeSubscriber

onAlive

public void onAlive(java.net.InetAddress endpoint,
                    EndpointState state)

Specified by:

onAlive in interface IEndpointStateChangeSubscriber

onDead

public void onDead(java.net.InetAddress endpoint,
                   EndpointState state)

Specified by:

onDead in interface IEndpointStateChangeSubscriber

onRestart

public void onRestart(java.net.InetAddress endpoint,
                      EndpointState state)

Description copied from interface: IEndpointStateChangeSubscriber

Called whenever a node is restarted. Note that there is no guarantee when that happens that the node was previously marked down. It will have only if state.isAlive() == false as state is from before the restarted node is marked up.

Specified by:

onRestart in interface IEndpointStateChangeSubscriber

onRemove

public void onRemove(java.net.InetAddress endpoint)

Specified by:

onRemove in interface IEndpointStateChangeSubscriber

rectifySchema

public static void rectifySchema(java.util.UUID theirVersion,
                                 java.net.InetAddress endpoint)

isReadyForBootstrap

public static boolean isReadyForBootstrap()

announce

public static void announce(java.util.Collection<RowMutation> schema)

actively announce a new version to active hosts via rpc

Parameters:

schema - The list of schema mutations to be applied on the recipient

passiveAnnounce

public static void passiveAnnounce(java.util.UUID version)

Announce my version passively over gossip. Used to notify nodes as they arrive in the cluster.

Parameters:

version - The schema version to announce

serializeSchema

public static byte[] serializeSchema(java.util.Collection<RowMutation> schema,
                                     int version)
                              throws java.io.IOException

Serialize given row mutations into raw bytes

Parameters:

schema - The row mutations to serialize

version - The version of the message service to use for serialization

Returns:

serialized mutations

Throws:

java.io.IOException - on failed serialization

deserializeMigrationMessage

public static java.util.Collection<RowMutation> deserializeMigrationMessage(byte[] data,
                                                                            int version)
                                                                     throws java.io.IOException

Deserialize migration message considering data compatibility starting from version 1.1

Parameters:

data - The data of the message from coordinator which hold schema mutations to apply

version - The version of the message

Returns:

The collection of the row mutations to apply on the node (aka schema)

Throws:

java.io.IOException - if message is of incompatible version or data is corrupted