alluxio.master.meta

Class RetryHandlingMetaMasterMasterClient

java.lang.Object

alluxio.AbstractClient

alluxio.AbstractMasterClient

alluxio.master.meta.RetryHandlingMetaMasterMasterClient

All Implemented Interfaces:

Client, Closeable, AutoCloseable

@ThreadSafe
public final class RetryHandlingMetaMasterMasterClient
extends AbstractMasterClient

A wrapper for the thrift client to interact with the primary meta master, used by Alluxio standby masters.

Since thrift clients are not thread safe, this class is a wrapper to provide thread safety, and to provide retries.

Nested Class Summary

Nested classes/interfaces inherited from class alluxio.AbstractClient

AbstractClient.RpcCallable<V>

Field Summary

Fields inherited from class alluxio.AbstractClient

mAddress, mClosed, mConnected, mProtocol, mServiceVersion

Constructor Summary

Constructors

Constructor and Description
RetryHandlingMetaMasterMasterClient(MasterClientConfig conf) Creates a instance of RetryHandlingMetaMasterMasterClient.

Method Summary

Modifier and Type	Method and Description
protected void	afterConnect() This method is called after the connection is made to the remote.
protected AlluxioService.Client	getClient()
long	getId(Address address) Returns a master id for a master address.
protected String	getServiceName()
protected long	getServiceVersion()
MetaCommand	heartbeat(long masterId) Sends a heartbeat to the leader master.
void	register(long masterId, List<ConfigProperty> configList) Registers with the leader master.

Methods inherited from class alluxio.AbstractMasterClient

getAddress

Methods inherited from class alluxio.AbstractClient

afterDisconnect, beforeDisconnect, checkVersion, close, connect, disconnect, isConnected, retryRPC, retryRPC

Methods inherited from class java.lang.Object

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

Constructor Detail

RetryHandlingMetaMasterMasterClient

public RetryHandlingMetaMasterMasterClient(MasterClientConfig conf)

Creates a instance of RetryHandlingMetaMasterMasterClient.

Parameters:

conf - master client configuration

Method Detail

getClient

protected AlluxioService.Client getClient()

Specified by:

getClient in class AbstractClient

Returns:

a Thrift service client

getServiceName

protected String getServiceName()

Specified by:

getServiceName in class AbstractClient

Returns:

a string representing the specific service

getServiceVersion

protected long getServiceVersion()

Specified by:

getServiceVersion in class AbstractClient

Returns:

the client service version

afterConnect

protected void afterConnect()
                     throws IOException

Description copied from class: AbstractClient

This method is called after the connection is made to the remote. Implementations should create internal state to finish the connection process.

Overrides:

afterConnect in class AbstractClient

Throws:

IOException

getId

public long getId(Address address)
           throws IOException

Returns a master id for a master address.

Parameters:

address - the address to get a master id for

Returns:

a master id

Throws:

IOException

heartbeat

public MetaCommand heartbeat(long masterId)
                      throws IOException

Sends a heartbeat to the leader master. Standby masters periodically execute this method so that the leader master knows they are still running.

Parameters:

masterId - the master id

Returns:

whether this master should re-register

Throws:

IOException

register

public void register(long masterId,
                     List<ConfigProperty> configList)
              throws IOException

Registers with the leader master.

Parameters:

masterId - the master id of the standby master registering

configList - the configuration of this master

Throws:

IOException