tillrohrmann commented on a change in pull request #12037: URL: https://github.com/apache/flink/pull/12037#discussion_r424914569
########## File path: flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/job/coordination/ClientCoordinationHandler.java ########## @@ -0,0 +1,84 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.flink.runtime.rest.handler.job.coordination; + +import org.apache.flink.api.common.JobID; +import org.apache.flink.api.common.time.Time; +import org.apache.flink.runtime.jobgraph.OperatorID; +import org.apache.flink.runtime.operators.coordination.CoordinationRequest; +import org.apache.flink.runtime.operators.coordination.CoordinationResponse; +import org.apache.flink.runtime.rest.handler.AbstractRestHandler; +import org.apache.flink.runtime.rest.handler.HandlerRequest; +import org.apache.flink.runtime.rest.handler.RestHandlerException; +import org.apache.flink.runtime.rest.messages.JobIDPathParameter; +import org.apache.flink.runtime.rest.messages.MessageHeaders; +import org.apache.flink.runtime.rest.messages.OperatorIDPathParameter; +import org.apache.flink.runtime.rest.messages.job.coordination.ClientCoordinationMessageParameters; +import org.apache.flink.runtime.rest.messages.job.coordination.ClientCoordinationRequestBody; +import org.apache.flink.runtime.rest.messages.job.coordination.ClientCoordinationResponseBody; +import org.apache.flink.runtime.webmonitor.RestfulGateway; +import org.apache.flink.runtime.webmonitor.retriever.GatewayRetriever; +import org.apache.flink.util.SerializedValue; + +import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpResponseStatus; + +import javax.annotation.Nonnull; + +import java.io.IOException; +import java.util.Map; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.CompletionException; + +/** + * Handler that receives the coordination requests from the client and returns the response from the coordinator. + */ +public class ClientCoordinationHandler extends AbstractRestHandler<RestfulGateway, ClientCoordinationRequestBody, ClientCoordinationResponseBody, ClientCoordinationMessageParameters> { + + public ClientCoordinationHandler( + GatewayRetriever<? extends RestfulGateway> leaderRetriever, + Time timeout, + Map<String, String> responseHeaders, + MessageHeaders<ClientCoordinationRequestBody, ClientCoordinationResponseBody, ClientCoordinationMessageParameters> messageHeaders) { + super(leaderRetriever, timeout, responseHeaders, messageHeaders); + } + + @Override + protected CompletableFuture<ClientCoordinationResponseBody> handleRequest( + @Nonnull HandlerRequest<ClientCoordinationRequestBody, ClientCoordinationMessageParameters> request, + @Nonnull RestfulGateway gateway) throws RestHandlerException { + JobID jobId = request.getPathParameter(JobIDPathParameter.class); + OperatorID operatorId = request.getPathParameter(OperatorIDPathParameter.class); + SerializedValue<CoordinationRequest> serializedRequest = + request.getRequestBody().getSerializedCoordinationRequest(); + CompletableFuture<CoordinationResponse> responseFuture = + gateway.deliverCoordinationRequestToCoordinator(jobId, operatorId, serializedRequest, timeout); + return responseFuture.thenApply( + coordinationResponse -> { + try { + return new ClientCoordinationResponseBody(new SerializedValue<>(coordinationResponse)); Review comment: Makes sense. I guess we will use another layer of `SerializedValue` if the user requests a user code object from the `OperatorCoordinator` which is then initialized on the JM. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
