content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.cli.fsadmin.doctor;
  
  import alluxio.client.meta.MetaMasterClient;
  import alluxio.grpc.ConfigStatus;
  import alluxio.grpc.Scope;
  import alluxio.wire.ConfigCheckReport;
  import alluxio.wire.InconsistentProperty;
  
  import java.io.IOException;
  import java.io.PrintStream;
  import java.util.List;
  import java.util.Map;
  import java.util.Optional;
  
  /**
   * Prints server-side configuration errors and warnings.
   */
  public class ConfigurationCommand {
    private final MetaMasterClient mMetaMasterClient;
    private final PrintStream mPrintStream;
  
    /**
     * Creates a new instance of {@link ConfigurationCommand}.
     *
     * @param metaMasterClient client to get server-side configuration report information
     * @param printStream stream to print configuration errors/warnings to
     */
    public ConfigurationCommand(MetaMasterClient metaMasterClient, PrintStream printStream) {
      mMetaMasterClient = metaMasterClient;
      mPrintStream = printStream;
    }
  
    /**
     * Runs doctor configuration command.
     *
     * @return 0 on success, 1 otherwise
     */
    public int run() throws IOException {
      ConfigCheckReport report = mMetaMasterClient.getConfigReport();
      ConfigStatus configStatus = report.getConfigStatus();
      if (configStatus == ConfigStatus.PASSED) {
        // No errors or warnings to show
        mPrintStream.println("No server-side configuration errors or warnings.");
        return 0;
      }
  
      Map<Scope, List<InconsistentProperty>> errors = report.getConfigErrors();
      if (errors.size() != 0) {
        mPrintStream.println("Server-side configuration errors "
            + "(those properties are required to be identical): ");
        printInconsistentProperties(errors);
      }
  
      Map<Scope, List<InconsistentProperty>> warnings = report.getConfigWarns();
      if (warnings.size() != 0) {
        mPrintStream.println("\nServer-side configuration warnings "
            + "(those properties are recommended to be identical): ");
        printInconsistentProperties(warnings);
      }
      return 0;
    }
  
    /**
     * Prints the inconsistent properties in server-side configuration.
     *
     * @param inconsistentProperties the inconsistent properties to print
     */
    private void printInconsistentProperties(
        Map<Scope, List<InconsistentProperty>> inconsistentProperties) {
      for (List<InconsistentProperty> list : inconsistentProperties.values()) {
        for (InconsistentProperty prop : list) {
          mPrintStream.println("key: " + prop.getName());
          for (Map.Entry<Optional<String>, List<String>> entry : prop.getValues().entrySet()) {
            mPrintStream.println("    value: " + String.format("%s (%s)",
                entry.getKey().orElse("no value set"),
                String.join(", ", entry.getValue())));
          }
        }
      }
    }
  }
  