hadoop-hdds/tools/src/main/java/org/apache/hadoop/hdds/scm/cli/pipeline/ListPipelinesSubcommand.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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.hdds.scm.cli.pipeline;

import org.apache.hadoop.hdds.cli.HddsVersionProvider;
import org.apache.hadoop.hdds.scm.client.ScmClient;
import picocli.CommandLine;

import java.util.concurrent.Callable;

/**
 * Handler of list pipelines command.
 */
@CommandLine.Command(
    name = "list",
    description = "List all active pipelines",
    mixinStandardHelpOptions = true,
    versionProvider = HddsVersionProvider.class)
public class ListPipelinesSubcommand implements Callable<Void> {

  @CommandLine.ParentCommand
  private PipelineCommands parent;

  @CommandLine.Option(names = {"-ffc", "--filterByFactor"},
      description = "Filter listed pipelines by Factor(ONE/one)",
      defaultValue = "",
      required = false)
  private String factor;

  @CommandLine.Option(names = {"-fst", "--filterByState"},
      description = "Filter listed pipelines by State(OPEN/CLOSE)",
      defaultValue = "",
      required = false)
  private String state;


  @Override
  public Void call() throws Exception {
    try (ScmClient scmClient = parent.getParent().createScmClient()) {
      if (isNullOrEmpty(factor) && isNullOrEmpty(state)) {
        scmClient.listPipelines().forEach(System.out::println);
      } else {
        scmClient.listPipelines().stream()
            .filter(p -> ((isNullOrEmpty(factor) ||
                (p.getFactor().toString().compareToIgnoreCase(factor) == 0))
                && (isNullOrEmpty(state) ||
                (p.getPipelineState().toString().compareToIgnoreCase(state)
                    == 0))))
            .forEach(System.out::println);
      }
      return null;
    }
  }

  protected static boolean isNullOrEmpty(String str) {
    return ((str == null) || str.trim().isEmpty());
  }
}