| /** |
| * 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.BitSet; |
| import java.util.List; |
| |
| import org.apache.bookkeeper.client.AsyncCallback.AddLacCallback; |
| import org.apache.bookkeeper.net.BookieSocketAddress; |
| import org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.WriteLacCallback; |
| import org.apache.bookkeeper.util.ByteBufList; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This represents a pending WriteLac operation. When it has got |
| * success from Ack Quorum bookies, sends success back to the application, |
| * otherwise failure is sent back to the caller. |
| * |
| * <p>This is an optional protocol operations to facilitate tailing readers |
| * to be up to date with the writer. This is best effort to get latest LAC |
| * from bookies, and doesn't affect the correctness of the protocol. |
| */ |
| class PendingWriteLacOp implements WriteLacCallback { |
| private static final Logger LOG = LoggerFactory.getLogger(PendingWriteLacOp.class); |
| ByteBufList toSend; |
| AddLacCallback cb; |
| long lac; |
| Object ctx; |
| BitSet receivedResponseSet; |
| |
| DistributionSchedule.AckSet ackSet; |
| boolean completed = false; |
| int lastSeenError = BKException.Code.WriteException; |
| |
| LedgerHandle lh; |
| ClientContext clientCtx; |
| |
| final List<BookieSocketAddress> currentEnsemble; |
| |
| PendingWriteLacOp(LedgerHandle lh, ClientContext clientCtx, List<BookieSocketAddress> ensemble, |
| AddLacCallback cb, Object ctx) { |
| this.lh = lh; |
| this.clientCtx = clientCtx; |
| this.cb = cb; |
| this.ctx = ctx; |
| this.lac = LedgerHandle.INVALID_ENTRY_ID; |
| ackSet = lh.distributionSchedule.getAckSet(); |
| currentEnsemble = ensemble; |
| } |
| |
| void setLac(long lac) { |
| this.lac = lac; |
| |
| this.receivedResponseSet = new BitSet( |
| lh.getLedgerMetadata().getWriteQuorumSize()); |
| this.receivedResponseSet.set(0, |
| lh.getLedgerMetadata().getWriteQuorumSize()); |
| } |
| |
| void sendWriteLacRequest(int bookieIndex) { |
| clientCtx.getBookieClient().writeLac(currentEnsemble.get(bookieIndex), |
| lh.ledgerId, lh.ledgerKey, lac, toSend, this, bookieIndex); |
| } |
| |
| void initiate(ByteBufList toSend) { |
| this.toSend = toSend; |
| DistributionSchedule.WriteSet writeSet = lh.distributionSchedule.getWriteSet(lac); |
| try { |
| for (int i = 0; i < writeSet.size(); i++) { |
| sendWriteLacRequest(writeSet.get(i)); |
| } |
| } finally { |
| writeSet.recycle(); |
| } |
| } |
| |
| @Override |
| public void writeLacComplete(int rc, long ledgerId, BookieSocketAddress addr, Object ctx) { |
| int bookieIndex = (Integer) ctx; |
| |
| if (completed) { |
| return; |
| } |
| |
| if (BKException.Code.OK != rc) { |
| lastSeenError = rc; |
| } |
| |
| // We got response. |
| receivedResponseSet.clear(bookieIndex); |
| |
| if (rc == BKException.Code.OK) { |
| if (ackSet.completeBookieAndCheck(bookieIndex) && !completed) { |
| completed = true; |
| cb.addLacComplete(rc, lh, ctx); |
| return; |
| } |
| } else { |
| LOG.warn("WriteLac did not succeed: Ledger {} on {}", new Object[] { ledgerId, addr }); |
| } |
| |
| if (receivedResponseSet.isEmpty()){ |
| completed = true; |
| cb.addLacComplete(lastSeenError, lh, ctx); |
| } |
| } |
| } |