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.client;
  
  import java.util.concurrent.TimeUnit;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.bookkeeper.common.util.MathUtils;
  import org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.ReadEntryListener;
  
  @Slf4j
  class ListenerBasedPendingReadOp extends PendingReadOp {
  
      final ReadEntryListener listener;
      final Object ctx;
  
      ListenerBasedPendingReadOp(LedgerHandle lh,
                                 ClientContext clientCtx,
                                 long startEntryId,
                                 long endEntryId,
                                 ReadEntryListener listener,
                                 Object ctx,
                                 boolean isRecoveryRead) {
          super(lh, clientCtx, startEntryId, endEntryId, isRecoveryRead);
          this.listener = listener;
          this.ctx = ctx;
      }
  
      @Override
      protected void submitCallback(int code) {
          SingleLedgerEntryRequest request;
          while (!seq.isEmpty() && (request = seq.getFirst()) != null) {
              if (!request.isComplete()) {
                  return;
              }
              seq.removeFirst();
              long latencyNanos = MathUtils.elapsedNanos(requestTimeNanos);
              LedgerEntry entry;
              if (BKException.Code.OK == request.getRc()) {
                  clientCtx.getClientStats().getReadOpLogger()
                      .registerSuccessfulEvent(latencyNanos, TimeUnit.NANOSECONDS);
                  // callback with completed entry
                  entry = new LedgerEntry(request.entryImpl);
              } else {
                  clientCtx.getClientStats().getReadOpLogger()
                      .registerFailedEvent(latencyNanos, TimeUnit.NANOSECONDS);
                  entry = null;
              }
              request.close();
              listener.onEntryComplete(request.getRc(), lh, entry, ctx);
          }
          // if all entries are already completed.
          cancelSpeculativeTask(true);
      }
  
  }
  