org.apache.flink.runtime.rest.messages.ClusterConfigurationInfoHeaders Maven / Gradle / Ivy

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/*
 * 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.messages;

import org.apache.flink.runtime.rest.HttpMethodWrapper;
import org.apache.flink.runtime.rest.handler.cluster.ClusterConfigHandler;

import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpResponseStatus;

/** Message headers for the {@link ClusterConfigHandler}. */
public final class ClusterConfigurationInfoHeaders
        implements RuntimeMessageHeaders<
                EmptyRequestBody, ConfigurationInfo, EmptyMessageParameters> {

    private static final ClusterConfigurationInfoHeaders INSTANCE =
            new ClusterConfigurationInfoHeaders();

    // TODO this REST path is inappropriately set due to legacy design reasons, and ideally should
    // be '/config';
    // TODO changing it would require corresponding path changes in flink-runtime-web
    public static final String CLUSTER_CONFIG_REST_PATH = "/jobmanager/config";

    private ClusterConfigurationInfoHeaders() {}

    @Override
    public Class getRequestClass() {
        return EmptyRequestBody.class;
    }

    @Override
    public HttpMethodWrapper getHttpMethod() {
        return HttpMethodWrapper.GET;
    }

    @Override
    public String getTargetRestEndpointURL() {
        return CLUSTER_CONFIG_REST_PATH;
    }

    @Override
    public Class getResponseClass() {
        return ConfigurationInfo.class;
    }

    @Override
    public HttpResponseStatus getResponseStatusCode() {
        return HttpResponseStatus.OK;
    }

    @Override
    public EmptyMessageParameters getUnresolvedMessageParameters() {
        return EmptyMessageParameters.getInstance();
    }

    public static ClusterConfigurationInfoHeaders getInstance() {
        return INSTANCE;
    }

    @Override
    public String getDescription() {
        return "Returns the cluster configuration.";
    }
}