org.apache.flink.runtime.rest.handler

Class LegacyRestHandlerAdapter<T extends RestfulGateway,R 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<org.apache.flink.shaded.netty4.io.netty.handler.codec.http.router.Routed>

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

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

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

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

Type Parameters:

T - type of the gateway

R - type of the REST response

M - type of the MessageParameters

All Implemented Interfaces:

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

public class LegacyRestHandlerAdapter<T extends RestfulGateway,R extends ResponseBody,M extends MessageParameters>
extends AbstractRestHandler<T,EmptyRequestBody,R,M>

Adapter for Flink's legacy REST handlers.

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.RedirectHandler

leaderRetriever, localAddressFuture, logger, responseHeaders, timeout

Constructor Summary

Constructors

Constructor and Description
LegacyRestHandlerAdapter(CompletableFuture<String> localRestAddress, GatewayRetriever<T> leaderRetriever, Time timeout, Map<String,String> headers, MessageHeaders<EmptyRequestBody,R,M> messageHeaders, LegacyRestHandler<T,R,M> legacyRestHandler)

Method Summary

Modifier and Type	Method and Description
protected CompletableFuture<R>	handleRequest(HandlerRequest<EmptyRequestBody,M> 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.RedirectHandler

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

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

LegacyRestHandlerAdapter

public LegacyRestHandlerAdapter(CompletableFuture<String> localRestAddress,
                                GatewayRetriever<T> leaderRetriever,
                                Time timeout,
                                Map<String,String> headers,
                                MessageHeaders<EmptyRequestBody,R,M> messageHeaders,
                                LegacyRestHandler<T,R,M> legacyRestHandler)

Method Detail

handleRequest

protected CompletableFuture<R> handleRequest(@Nonnull
                                             HandlerRequest<EmptyRequestBody,M> 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,EmptyRequestBody,R 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