hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/test/java/org/apache/hadoop/yarn/server/router/webapp/TestableFederationInterceptorREST.java

/**
 * 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.hadoop.yarn.server.router.webapp;

import java.util.ArrayList;
import java.util.List;

import org.apache.hadoop.yarn.server.federation.store.records.SubClusterId;

/**
 * Extends the FederationInterceptorREST and overrides methods to provide a
 * testable implementation of FederationInterceptorREST.
 */
public class TestableFederationInterceptorREST
    extends FederationInterceptorREST {

  private List<SubClusterId> badSubCluster = new ArrayList<SubClusterId>();

  /**
   * For testing purpose, some subclusters has to be down to simulate particular
   * scenarios as RM Failover, network issues. For this reason we keep track of
   * these bad subclusters. This method make the subcluster unusable.
   *
   * @param badSC the subcluster to make unusable
   */
  protected void registerBadSubCluster(SubClusterId badSC) {

    // Adding in the cache the bad SubCluster, in this way we can stop them
    getOrCreateInterceptorForSubCluster(badSC, "test");

    badSubCluster.add(badSC);
    MockDefaultRequestInterceptorREST interceptor =
        (MockDefaultRequestInterceptorREST) super.getInterceptorForSubCluster(
            badSC);
    interceptor.setRunning(false);
  }

}