org.apache.flink.runtime.rest.handler.job.coordination

Class ClientCoordinationHandler

java.lang.Object

org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandlerAdapter

org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandlerAdapter

org.apache.flink.shaded.netty4.io.netty.channel.SimpleChannelInboundHandler<RoutedRequest>

org.apache.flink.runtime.rest.handler.LeaderRetrievalHandler<T>

org.apache.flink.runtime.rest.handler.AbstractHandler<T,R,M>

org.apache.flink.runtime.rest.handler.AbstractRestHandler<RestfulGateway,ClientCoordinationRequestBody,ClientCoordinationResponseBody,ClientCoordinationMessageParameters>

org.apache.flink.runtime.rest.handler.job.coordination.ClientCoordinationHandler

All Implemented Interfaces:

AutoCloseable, org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandler, org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandler, org.apache.flink.util.AutoCloseableAsync

public class ClientCoordinationHandler
extends AbstractRestHandler<RestfulGateway,ClientCoordinationRequestBody,ClientCoordinationResponseBody,ClientCoordinationMessageParameters>

Handler that receives the coordination requests from the client and returns the response from the coordinator.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandler

org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandler.Sharable

Field Summary

Fields inherited from class org.apache.flink.runtime.rest.handler.AbstractHandler

log, MAPPER

Fields inherited from class org.apache.flink.runtime.rest.handler.LeaderRetrievalHandler

leaderRetriever, logger, responseHeaders, timeout

Constructor Summary

Constructors

Constructor and Description
ClientCoordinationHandler(GatewayRetriever<? extends RestfulGateway> leaderRetriever, org.apache.flink.api.common.time.Time timeout, Map<String,String> responseHeaders, MessageHeaders<ClientCoordinationRequestBody,ClientCoordinationResponseBody,ClientCoordinationMessageParameters> messageHeaders)

Method Summary

Modifier and Type	Method and Description
protected CompletableFuture<ClientCoordinationResponseBody>	handleRequest(HandlerRequest<ClientCoordinationRequestBody> request, RestfulGateway gateway) This method is called for every incoming request and returns a CompletableFuture containing a the response.

Methods inherited from class org.apache.flink.runtime.rest.handler.AbstractRestHandler

getMessageHeaders, respondToRequest

Methods inherited from class org.apache.flink.runtime.rest.handler.AbstractHandler

closeAsync, closeHandlerAsync, respondAsLeader

Methods inherited from class org.apache.flink.runtime.rest.handler.LeaderRetrievalHandler

channelRead0, getTimeout

Methods inherited from class org.apache.flink.shaded.netty4.io.netty.channel.SimpleChannelInboundHandler

acceptInboundMessage, channelRead

Methods inherited from class org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandlerAdapter

channelActive, channelInactive, channelReadComplete, channelRegistered, channelUnregistered, channelWritabilityChanged, exceptionCaught, userEventTriggered

Methods inherited from class org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandlerAdapter

ensureNotSharable, handlerAdded, handlerRemoved, isSharable

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.util.AutoCloseableAsync

close

Methods inherited from interface org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandler

handlerAdded, handlerRemoved

Constructor Detail

ClientCoordinationHandler

public ClientCoordinationHandler(GatewayRetriever<? extends RestfulGateway> leaderRetriever,
                                 org.apache.flink.api.common.time.Time timeout,
                                 Map<String,String> responseHeaders,
                                 MessageHeaders<ClientCoordinationRequestBody,ClientCoordinationResponseBody,ClientCoordinationMessageParameters> messageHeaders)

Method Detail

handleRequest

protected CompletableFuture<ClientCoordinationResponseBody> handleRequest(@Nonnull
                                                                          HandlerRequest<ClientCoordinationRequestBody> request,
                                                                          @Nonnull
                                                                          RestfulGateway gateway)
                                                                   throws RestHandlerException

Description copied from class: AbstractRestHandler

This method is called for every incoming request and returns a CompletableFuture containing a the response.

Implementations may decide whether to throw RestHandlerExceptions or fail the returned CompletableFuture with a RestHandlerException.

Failing the future with another exception type or throwing unchecked exceptions is regarded as an implementation error as it does not allow us to provide a meaningful HTTP status code. In this case a HttpResponseStatus.INTERNAL_SERVER_ERROR will be returned.

Specified by:

handleRequest in class AbstractRestHandler<RestfulGateway,ClientCoordinationRequestBody,ClientCoordinationResponseBody,ClientCoordinationMessageParameters>

Parameters:

request - request that should be handled

gateway - leader gateway

Returns:

future containing a handler response

Throws:

RestHandlerException - if the handling failed