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.proto;
  
  import com.google.protobuf.ByteString;
  import java.io.IOException;
  import java.util.concurrent.TimeUnit;
  import org.apache.bookkeeper.bookie.Bookie;
  import org.apache.bookkeeper.common.util.MathUtils;
  import org.apache.bookkeeper.proto.BookkeeperProtocol.GetListOfEntriesOfLedgerRequest;
  import org.apache.bookkeeper.proto.BookkeeperProtocol.GetListOfEntriesOfLedgerResponse;
  import org.apache.bookkeeper.proto.BookkeeperProtocol.Request;
  import org.apache.bookkeeper.proto.BookkeeperProtocol.Response;
  import org.apache.bookkeeper.proto.BookkeeperProtocol.StatusCode;
  import org.apache.bookkeeper.util.AvailabilityOfEntriesOfLedger;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * A processor class for v3 entries of a ledger packets.
   */
  public class GetListOfEntriesOfLedgerProcessorV3 extends PacketProcessorBaseV3 implements Runnable {
  
      private static final Logger LOG = LoggerFactory.getLogger(GetListOfEntriesOfLedgerProcessorV3.class);
      protected final GetListOfEntriesOfLedgerRequest getListOfEntriesOfLedgerRequest;
      protected final long ledgerId;
  
      public GetListOfEntriesOfLedgerProcessorV3(Request request, BookieRequestHandler requestHandler,
              BookieRequestProcessor requestProcessor) {
          super(request, requestHandler, requestProcessor);
          this.getListOfEntriesOfLedgerRequest = request.getGetListOfEntriesOfLedgerRequest();
          this.ledgerId = getListOfEntriesOfLedgerRequest.getLedgerId();
      }
  
      private GetListOfEntriesOfLedgerResponse getListOfEntriesOfLedgerResponse() {
          long startTimeNanos = MathUtils.nowInNano();
  
          GetListOfEntriesOfLedgerResponse.Builder getListOfEntriesOfLedgerResponse = GetListOfEntriesOfLedgerResponse
                  .newBuilder();
          getListOfEntriesOfLedgerResponse.setLedgerId(ledgerId);
  
          if (!isVersionCompatible()) {
              getListOfEntriesOfLedgerResponse.setStatus(StatusCode.EBADVERSION);
              requestProcessor.getRequestStats().getGetListOfEntriesOfLedgerStats()
                      .registerFailedEvent(MathUtils.elapsedNanos(startTimeNanos), TimeUnit.NANOSECONDS);
              return getListOfEntriesOfLedgerResponse.build();
          }
  
          if (LOG.isDebugEnabled()) {
              LOG.debug("Received new getListOfEntriesOfLedger request: {}", request);
          }
          StatusCode status = StatusCode.EOK;
          AvailabilityOfEntriesOfLedger availabilityOfEntriesOfLedger = null;
          try {
              availabilityOfEntriesOfLedger = new AvailabilityOfEntriesOfLedger(
                      requestProcessor.bookie.getListOfEntriesOfLedger(ledgerId));
              getListOfEntriesOfLedgerResponse.setAvailabilityOfEntriesOfLedger(
                      ByteString.copyFrom(availabilityOfEntriesOfLedger.serializeStateOfEntriesOfLedger()));
  
          } catch (Bookie.NoLedgerException e) {
              status = StatusCode.ENOLEDGER;
              LOG.error("No ledger found while performing getListOfEntriesOfLedger from ledger: {}", ledgerId, e);
          } catch (IOException e) {
              status = StatusCode.EIO;
              LOG.error("IOException while performing getListOfEntriesOfLedger from ledger: {}", ledgerId);
          }
  
          if (status == StatusCode.EOK) {
              requestProcessor.getRequestStats().getListOfEntriesOfLedgerStats
                      .registerSuccessfulEvent(MathUtils.elapsedNanos(startTimeNanos), TimeUnit.NANOSECONDS);
          } else {
              requestProcessor.getRequestStats().getListOfEntriesOfLedgerStats
                      .registerFailedEvent(MathUtils.elapsedNanos(startTimeNanos), TimeUnit.NANOSECONDS);
          }
          // Finally set the status and return
          getListOfEntriesOfLedgerResponse.setStatus(status);
          return getListOfEntriesOfLedgerResponse.build();
      }
  
      @Override
      public void run() {
          GetListOfEntriesOfLedgerResponse listOfEntriesOfLedgerResponse = getListOfEntriesOfLedgerResponse();
          Response.Builder response = Response.newBuilder().setHeader(getHeader())
                  .setStatus(listOfEntriesOfLedgerResponse.getStatus())
                  .setGetListOfEntriesOfLedgerResponse(listOfEntriesOfLedgerResponse);
          Response resp = response.build();
          sendResponse(listOfEntriesOfLedgerResponse.getStatus(), resp,
                  requestProcessor.getRequestStats().getListOfEntriesOfLedgerRequestStats);
      }
  }
  