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 static org.apache.bookkeeper.client.LedgerHandle.INVALID_ENTRY_ID;
  
  import org.apache.bookkeeper.client.BKException;
  import org.apache.bookkeeper.util.ByteBufList;
  
  class BatchedReadCompletion extends CompletionValue {
  
      final BookkeeperInternalCallbacks.BatchedReadEntryCallback cb;
  
      public BatchedReadCompletion(final CompletionKey key,
                                   final BookkeeperInternalCallbacks.BatchedReadEntryCallback originalCallback,
                                   final Object originalCtx,
                                   long ledgerId, final long entryId,
                                   PerChannelBookieClient perChannelBookieClient) {
          super("BatchedRead", originalCtx, ledgerId, entryId, perChannelBookieClient);
          this.opLogger = perChannelBookieClient.readEntryOpLogger;
          this.timeoutOpLogger = perChannelBookieClient.readTimeoutOpLogger;
          this.cb = (rc, ledgerId1, startEntryId, bufList, ctx) -> {
              logOpResult(rc);
              originalCallback.readEntriesComplete(rc,
                      ledgerId1, entryId,
                      bufList, originalCtx);
              key.release();
          };
      }
  
      @Override
      public void errorOut() {
          errorOut(BKException.Code.BookieHandleNotAvailableException);
      }
  
      @Override
      public void errorOut(final int rc) {
          errorOutAndRunCallback(
                  () -> cb.readEntriesComplete(rc, ledgerId,
                          entryId, null, ctx));
      }
  
      @Override
      public void handleV2Response(long ledgerId,
                                   long entryId,
                                   BookkeeperProtocol.StatusCode status,
                                   BookieProtocol.Response response) {
  
          perChannelBookieClient.readEntryOutstanding.dec();
          if (!(response instanceof BookieProtocol.BatchedReadResponse)) {
              return;
          }
          BookieProtocol.BatchedReadResponse readResponse = (BookieProtocol.BatchedReadResponse) response;
          handleBatchedReadResponse(ledgerId, entryId, status, readResponse.getData(),
                  INVALID_ENTRY_ID, -1L);
      }
  
      @Override
      public void handleV3Response(BookkeeperProtocol.Response response) {
          // V3 protocol haven't supported batched read yet.
      }
  
      private void handleBatchedReadResponse(long ledgerId,
                                             long entryId,
                                             BookkeeperProtocol.StatusCode status,
                                             ByteBufList buffers,
                                             long maxLAC, // max known lac piggy-back from bookies
                                             long lacUpdateTimestamp) { // the timestamp when the lac is updated.
          int rc = convertStatus(status, BKException.Code.ReadException);
  
          if (maxLAC > INVALID_ENTRY_ID && (ctx instanceof BookkeeperInternalCallbacks.ReadEntryCallbackCtx)) {
              ((BookkeeperInternalCallbacks.ReadEntryCallbackCtx) ctx).setLastAddConfirmed(maxLAC);
          }
          if (lacUpdateTimestamp > -1L && (ctx instanceof ReadLastConfirmedAndEntryContext)) {
              ((ReadLastConfirmedAndEntryContext) ctx).setLacUpdateTimestamp(lacUpdateTimestamp);
          }
          cb.readEntriesComplete(rc, ledgerId, entryId, buffers, ctx);
      }
  }
  