org.apache.flink.runtime.rest.handler.resourcemanager

Class AbstractResourceManagerHandler<T extends RestfulGateway,R extends RequestBody,P extends ResponseBody,M extends MessageParameters>

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<T,R,P,M>

org.apache.flink.runtime.rest.handler.resourcemanager.AbstractResourceManagerHandler<T,R,P,M>

Type Parameters:

T - type of the RestfulGateway

R - request type

P - response type

M - message parameters type

All Implemented Interfaces:

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

Direct Known Subclasses:

ClusterDataSetListHandler, TaskManagerDetailsHandler, TaskManagerLogListHandler, TaskManagersHandler, TaskManagerThreadDumpHandler

public abstract class AbstractResourceManagerHandler<T extends RestfulGateway,R extends RequestBody,P extends ResponseBody,M extends MessageParameters>
extends AbstractRestHandler<T,R,P,M>

Base class for REST handlers which need access to the ResourceManager.

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

Modifier	Constructor and Description
protected	AbstractResourceManagerHandler(GatewayRetriever<? extends T> leaderRetriever, Time timeout, Map<String,String> responseHeaders, MessageHeaders<R,P,M> messageHeaders, GatewayRetriever<ResourceManagerGateway> resourceManagerGatewayRetriever)

Method Summary

Modifier and Type	Method and Description
static ResourceManagerGateway	getResourceManagerGateway(GatewayRetriever<ResourceManagerGateway> resourceManagerGatewayRetriever)
protected abstract CompletableFuture<P>	handleRequest(HandlerRequest<R> request, ResourceManagerGateway gateway)
protected CompletableFuture<P>	handleRequest(HandlerRequest<R> request, T 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

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

AbstractResourceManagerHandler

protected AbstractResourceManagerHandler(GatewayRetriever<? extends T> leaderRetriever,
                                         Time timeout,
                                         Map<String,String> responseHeaders,
                                         MessageHeaders<R,P,M> messageHeaders,
                                         GatewayRetriever<ResourceManagerGateway> resourceManagerGatewayRetriever)

Method Detail

handleRequest

protected CompletableFuture<P> handleRequest(@Nonnull
                                             HandlerRequest<R> request,
                                             @Nonnull
                                             T 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<T extends RestfulGateway,R extends RequestBody,P extends ResponseBody,M extends MessageParameters>

Parameters:

request - request that should be handled

gateway - leader gateway

Returns:

future containing a handler response

Throws:

RestHandlerException - if the handling failed

handleRequest

protected abstract CompletableFuture<P> handleRequest(@Nonnull
                                                      HandlerRequest<R> request,
                                                      @Nonnull
                                                      ResourceManagerGateway gateway)
                                               throws RestHandlerException

Throws:

RestHandlerException

getResourceManagerGateway

public static ResourceManagerGateway getResourceManagerGateway(GatewayRetriever<ResourceManagerGateway> resourceManagerGatewayRetriever)
                                                        throws RestHandlerException

Throws:

RestHandlerException