hadoop-hdds/tools/src/main/java/org/apache/hadoop/hdds/scm/cli/SafeModeCheckSubcommand.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;

import java.io.IOException;
import java.util.Map;

import org.apache.commons.lang3.tuple.Pair;
import org.apache.hadoop.hdds.cli.HddsVersionProvider;
import org.apache.hadoop.hdds.scm.client.ScmClient;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import picocli.CommandLine;
import picocli.CommandLine.Command;

/**
 * This is the handler that process safe mode check command.
 */
@Command(
    name = "status",
    description = "Check if SCM is in safe mode",
    mixinStandardHelpOptions = true,
    versionProvider = HddsVersionProvider.class)
public class SafeModeCheckSubcommand extends ScmSubcommand {

  private static final Logger LOG =
      LoggerFactory.getLogger(SafeModeCheckSubcommand.class);

  @CommandLine.Option(names = {"--verbose"},
      description = "Show detailed status of rules.")
  private boolean verbose;

  @Override
  public void execute(ScmClient scmClient) throws IOException {
    boolean execReturn = scmClient.inSafeMode();

    // Output data list
    if(execReturn){
      LOG.info("SCM is in safe mode.");
      if (verbose) {
        for (Map.Entry<String, Pair<Boolean, String>> entry :
            scmClient.getSafeModeRuleStatuses().entrySet()) {
          Pair<Boolean, String> value = entry.getValue();
          LOG.info("validated:{}, {}, {}",
              value.getLeft(), entry.getKey(), value.getRight());
        }
      }
    } else {
      LOG.info("SCM is out of safe mode.");
    }
  }
}