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 io.netty.buffer.Unpooled;
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.util.concurrent.TimeUnit;
  import org.apache.bookkeeper.bookie.BookieException;
  import org.apache.bookkeeper.common.util.MathUtils;
  import org.apache.bookkeeper.net.BookieId;
  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.proto.BookkeeperProtocol.WriteLacRequest;
  import org.apache.bookkeeper.proto.BookkeeperProtocol.WriteLacResponse;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  class WriteLacProcessorV3 extends PacketProcessorBaseV3 implements Runnable {
      private static final Logger logger = LoggerFactory.getLogger(WriteLacProcessorV3.class);
  
      public WriteLacProcessorV3(Request request, BookieRequestHandler requestHandler,
                               BookieRequestProcessor requestProcessor) {
          super(request, requestHandler, requestProcessor);
      }
  
      // Returns null if there is no exception thrown
      private WriteLacResponse getWriteLacResponse() {
          final long startTimeNanos = MathUtils.nowInNano();
          WriteLacRequest writeLacRequest = request.getWriteLacRequest();
          long lac = writeLacRequest.getLac();
          long ledgerId = writeLacRequest.getLedgerId();
  
          final WriteLacResponse.Builder writeLacResponse = WriteLacResponse.newBuilder().setLedgerId(ledgerId);
  
          if (!isVersionCompatible()) {
              writeLacResponse.setStatus(StatusCode.EBADVERSION);
              return writeLacResponse.build();
          }
  
          if (requestProcessor.bookie.isReadOnly()) {
              logger.warn("BookieServer is running as readonly mode, so rejecting the request from the client!");
              writeLacResponse.setStatus(StatusCode.EREADONLY);
              return writeLacResponse.build();
          }
  
          BookkeeperInternalCallbacks.WriteCallback writeCallback = new BookkeeperInternalCallbacks.WriteCallback() {
              @Override
              public void writeComplete(int rc, long ledgerId, long entryId, BookieId addr, Object ctx) {
                  if (BookieProtocol.EOK == rc) {
                      requestProcessor.getRequestStats().getWriteLacStats()
                          .registerSuccessfulEvent(MathUtils.elapsedNanos(startTimeNanos), TimeUnit.NANOSECONDS);
                  } else {
                      requestProcessor.getRequestStats().getWriteLacStats()
                          .registerFailedEvent(MathUtils.elapsedNanos(startTimeNanos), TimeUnit.NANOSECONDS);
                  }
  
                  StatusCode status;
                  switch (rc) {
                  case BookieProtocol.EOK:
                      status = StatusCode.EOK;
                      break;
                  case BookieProtocol.EIO:
                      status = StatusCode.EIO;
                      break;
                  default:
                      status = StatusCode.EUA;
                      break;
                  }
                  writeLacResponse.setStatus(status);
                  Response.Builder response = Response.newBuilder()
                          .setHeader(getHeader())
                          .setStatus(writeLacResponse.getStatus())
                          .setWriteLacResponse(writeLacResponse);
                  Response resp = response.build();
                  sendResponse(status, resp, requestProcessor.getRequestStats().getWriteLacRequestStats());
              }
          };
  
          StatusCode status = null;
          ByteBuffer lacToAdd = writeLacRequest.getBody().asReadOnlyByteBuffer();
          byte[] masterKey = writeLacRequest.getMasterKey().toByteArray();
  
          try {
              requestProcessor.bookie.setExplicitLac(Unpooled.wrappedBuffer(lacToAdd),
                      writeCallback, requestHandler, masterKey);
              status = StatusCode.EOK;
          } catch (BookieException.LedgerFencedAndDeletedException e) {
              logger.error("Error saving lac {} for ledger:{}, which has been deleted",
                      lac, ledgerId, e);
              status = StatusCode.ENOLEDGER;
          } catch (IOException e) {
              logger.error("Error saving lac {} for ledger:{}",
                      lac, ledgerId, e);
              status = StatusCode.EIO;
          } catch (InterruptedException  e) {
              Thread.currentThread().interrupt();
              logger.error("Interrupted while saving lac {} for ledger:{}",
                      lac, ledgerId, e);
              status = StatusCode.EIO;
          } catch (BookieException e) {
              logger.error("Unauthorized access to ledger:{} while adding lac:{}",
                      ledgerId, lac, e);
              status = StatusCode.EUA;
          } catch (Throwable t) {
              logger.error("Unexpected exception while writing lac {} for ledger:{}",
                      lac, ledgerId, t);
              // some bad request which cause unexpected exception
              status = StatusCode.EBADREQ;
          }
  
          // If everything is okay, we return null so that the calling function
          // dosn't return a response back to the caller.
          if (!status.equals(StatusCode.EOK)) {
              requestProcessor.getRequestStats().getWriteLacStats()
                  .registerFailedEvent(MathUtils.elapsedNanos(startTimeNanos), TimeUnit.NANOSECONDS);
              writeLacResponse.setStatus(status);
              return writeLacResponse.build();
          }
          return null;
      }
  
      @Override
      public void run() {
          WriteLacResponse writeLacResponse = getWriteLacResponse();
          if (null != writeLacResponse) {
              Response.Builder response = Response.newBuilder()
                      .setHeader(getHeader())
                      .setStatus(writeLacResponse.getStatus())
                      .setWriteLacResponse(writeLacResponse);
              Response resp = response.build();
              sendResponse(
                  writeLacResponse.getStatus(),
                  resp,
                  requestProcessor.getRequestStats().getWriteLacRequestStats());
          }
      }
  
      /**
       * this toString method filters out body and masterKey from the output.
       * masterKey contains the password of the ledger and body is customer data,
       * so it is not appropriate to have these in logs or system output.
       */
      @Override
      public String toString() {
          return RequestUtils.toSafeString(request);
      }
  }
  
  
  