Package org.apache.flink.queryablestate.network

Class Client<REQ extends MessageBody,RESP extends MessageBody>

java.lang.Object

org.apache.flink.queryablestate.network.Client<REQ,RESP>

Type Parameters:

REQ - the type of request the client will send.

RESP - the type of response the client expects to receive.

@Internal
public class Client<REQ extends MessageBody,RESP extends MessageBody>
extends Object

The base class for every client in the queryable state module. It is using pure netty to send and receive messages of type MessageBody.

Constructor Summary

Constructors

Constructor	Description
Client(String clientName, int numEventLoopThreads, MessageSerializer<REQ,RESP> serializer, KvStateRequestStats stats)	Creates a client with the specified number of event loop threads.

Method Summary

Modifier and Type	Method	Description
String	getClientName()
boolean	isEventGroupShutdown()
CompletableFuture<RESP>	sendRequest(InetSocketAddress serverAddress, REQ request)
CompletableFuture<Void>	shutdown()	Shuts down the client and closes all connections.

Methods inherited from class java.lang.Object

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

Constructor Details

Client

public Client(String clientName,
 int numEventLoopThreads,
 MessageSerializer<REQ,RESP> serializer,
 KvStateRequestStats stats)

Creates a client with the specified number of event loop threads.

Parameters:

clientName - the name of the client.

numEventLoopThreads - number of event loop threads (minimum 1).

serializer - the serializer used to (de-)serialize messages.

stats - the statistics collector.

Method Details

getClientName

public String getClientName()

sendRequest

public CompletableFuture<RESP> sendRequest(InetSocketAddress serverAddress,
 REQ request)

shutdown

public CompletableFuture<Void> shutdown()

Shuts down the client and closes all connections.

After a call to this method, all returned futures will be failed.

Returns:

A CompletableFuture that will be completed when the shutdown process is done.

isEventGroupShutdown

@VisibleForTesting
public boolean isEventGroupShutdown()