hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/nodelabels/store/op/RemoveClusterLabelOp.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.nodelabels.store.op;

import com.google.common.collect.Sets;
import org.apache.hadoop.yarn.nodelabels.CommonNodeLabelsManager;
import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos;
import org.apache.hadoop.yarn.server.api.protocolrecords
    .RemoveFromClusterNodeLabelsRequest;
import org.apache.hadoop.yarn.server.api.protocolrecords.impl.pb
    .RemoveFromClusterNodeLabelsRequestPBImpl;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Collection;

/**
 * Remove label from cluster log store operation.
 */
public class RemoveClusterLabelOp
    extends FSNodeStoreLogOp<CommonNodeLabelsManager> {

  private Collection<String> labels;

  public static final int OPCODE = 2;

  @Override
  public void write(OutputStream os, CommonNodeLabelsManager mgr)
      throws IOException {
    ((RemoveFromClusterNodeLabelsRequestPBImpl)
        RemoveFromClusterNodeLabelsRequest
        .newInstance(Sets.newHashSet(labels.iterator()))).getProto()
        .writeDelimitedTo(os);
  }

  @Override
  public void recover(InputStream is, CommonNodeLabelsManager mgr)
      throws IOException {
    labels =
        YarnServerResourceManagerServiceProtos
            .RemoveFromClusterNodeLabelsRequestProto
            .parseDelimitedFrom(is).getNodeLabelsList();
    mgr.removeFromClusterNodeLabels(labels);
  }

  public RemoveClusterLabelOp setLabels(Collection<String> labels) {
    this.labels = labels;
    return this;
  }

  public Collection<String> getLabels() {
    return labels;
  }

  @Override
  public int getOpCode() {
    return OPCODE;
  }
}