content: /*
   * 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.bookkeeper.tools.cli.commands.autorecovery;
  
  import static org.apache.bookkeeper.meta.MetadataDrivers.runFunctionWithLedgerManagerFactory;
  
  import com.beust.jcommander.Parameter;
  import com.google.common.util.concurrent.UncheckedExecutionException;
  import java.util.Iterator;
  import java.util.LinkedList;
  import java.util.List;
  import lombok.Setter;
  import lombok.experimental.Accessors;
  import org.apache.bookkeeper.conf.ServerConfiguration;
  import org.apache.bookkeeper.meta.LedgerManager;
  import org.apache.bookkeeper.meta.LedgerUnderreplicationManager;
  import org.apache.bookkeeper.meta.UnderreplicatedLedger;
  import org.apache.bookkeeper.replication.ReplicationException;
  import org.apache.bookkeeper.tools.cli.helpers.BookieCommand;
  import org.apache.bookkeeper.tools.framework.CliFlags;
  import org.apache.bookkeeper.tools.framework.CliSpec;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * Command to Query current auto recovery status.
   */
  public class QueryAutoRecoveryStatusCommand
          extends BookieCommand<QueryAutoRecoveryStatusCommand.QFlags> {
      static final Logger LOG = LoggerFactory.
              getLogger(QueryAutoRecoveryStatusCommand.class);
      private static final String NAME = "queryautorecoverystatus";
      private static final String DESC = "Query autorecovery status.";
  
      public QueryAutoRecoveryStatusCommand() {
          super(CliSpec.<QFlags>newBuilder()
                  .withName(NAME)
                  .withDescription(DESC)
                  .withFlags(new QFlags())
                  .build());
      }
  
      @Override
      public boolean apply(ServerConfiguration conf, QFlags cmdFlags) {
          try {
              return handler(conf, cmdFlags);
          } catch (Exception e) {
              throw new UncheckedExecutionException(e.getMessage(), e);
          }
      }
  
      /**
       * Flags for list under replicated command.
       */
      @Accessors(fluent = true)
      @Setter
      public static class QFlags extends CliFlags{
          @Parameter(names =  {"-v", "--verbose"}, description = "list recovering detailed ledger info")
          private Boolean verbose = false;
      }
  
      private static class LedgerRecoverInfo {
          Long ledgerId;
          String bookieId;
          LedgerRecoverInfo(Long ledgerId, String bookieId) {
              this.ledgerId = ledgerId;
              this.bookieId = bookieId;
          }
      }
  
      /*
      Print Message format is like this:
  
       CurrentRecoverLedgerInfo:
          LedgerId:   BookieId:     LedgerSize:(detail)
          LedgerId:   BookieId:     LedgerSize:(detail)
       */
      public boolean handler(ServerConfiguration conf, QFlags flag) throws Exception {
          runFunctionWithLedgerManagerFactory(conf, mFactory -> {
              LedgerUnderreplicationManager underreplicationManager;
              LedgerManager ledgerManager = mFactory.newLedgerManager();
              List<LedgerRecoverInfo> ledgerList = new LinkedList<>();
              try {
                  underreplicationManager = mFactory.newLedgerUnderreplicationManager();
              } catch (ReplicationException e) {
                  throw new UncheckedExecutionException("Failed to new ledger underreplicated manager", e);
              } catch (InterruptedException e) {
                  Thread.currentThread().interrupt();
                  throw new UncheckedExecutionException("Interrupted on newing ledger underreplicated manager", e);
              }
              Iterator<UnderreplicatedLedger> iter = underreplicationManager.listLedgersToRereplicate(null);
              while (iter.hasNext()) {
                  UnderreplicatedLedger underreplicatedLedger = iter.next();
                  long urLedgerId = underreplicatedLedger.getLedgerId();
                  try {
                      String replicationWorkerId = underreplicationManager
                              .getReplicationWorkerIdRereplicatingLedger(urLedgerId);
                      if (replicationWorkerId != null) {
                          ledgerList.add(new LedgerRecoverInfo(urLedgerId, replicationWorkerId));
                      }
                  } catch (ReplicationException.UnavailableException e) {
                      LOG.error("Failed to get ReplicationWorkerId rereplicating ledger {} -- {}", urLedgerId,
                              e.getMessage());
                  }
              }
  
              LOG.info("CurrentRecoverLedgerInfo:");
              if (!flag.verbose) {
                  for (int i = 0; i < ledgerList.size(); i++) {
                      LOG.info("\tLedgerId:{}\tBookieId:{}", ledgerList.get(i).ledgerId, ledgerList.get(i).bookieId);
                  }
              } else {
                  for (int i = 0; i < ledgerList.size(); i++) {
                      LedgerRecoverInfo info = ledgerList.get(i);
                      ledgerManager.readLedgerMetadata(info.ledgerId).whenComplete((metadata, exception) -> {
                          if (exception == null) {
                              LOG.info("\tLedgerId:{}\tBookieId:{}\tLedgerSize:{}",
                                      info.ledgerId, info.bookieId, metadata.getValue().getLength());
                          } else {
                              LOG.error("Unable to read the ledger: {} information", info.ledgerId);
                              throw new UncheckedExecutionException(exception);
                          }
                      });
                  }
              }
              if (ledgerList.size() == 0) {
                  // NO ledger is being auto recovering
                  LOG.info("\t No Ledger is being recovered.");
              }
              return null;
          });
          return true;
      }
  }
  