| /* |
| * 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.pulsar.broker.service.persistent; |
| |
| |
| import io.netty.buffer.ByteBuf; |
| import java.util.List; |
| import lombok.extern.slf4j.Slf4j; |
| import org.apache.bookkeeper.mledger.Entry; |
| import org.apache.bookkeeper.mledger.ManagedCursor; |
| import org.apache.pulsar.broker.PulsarServerException; |
| import org.apache.pulsar.broker.service.BrokerService; |
| import org.apache.pulsar.client.impl.MessageIdImpl; |
| import org.apache.pulsar.client.impl.MessageImpl; |
| import org.apache.pulsar.client.impl.PulsarClientImpl; |
| import org.apache.pulsar.common.util.Codec; |
| |
| /** |
| * Replicate messages to shadow topic. |
| */ |
| @Slf4j |
| public class ShadowReplicator extends PersistentReplicator { |
| |
| public ShadowReplicator(String shadowTopic, PersistentTopic sourceTopic, ManagedCursor cursor, |
| BrokerService brokerService, PulsarClientImpl replicationClient) |
| throws PulsarServerException { |
| super(brokerService.pulsar().getConfiguration().getClusterName(), sourceTopic, cursor, |
| brokerService.pulsar().getConfiguration().getClusterName(), shadowTopic, brokerService, |
| replicationClient); |
| } |
| |
| /** |
| * @return Producer name format : replicatorPrefix-localTopic-->remoteTopic |
| */ |
| @Override |
| protected String getProducerName() { |
| return replicatorPrefix + "-" + localTopicName + REPL_PRODUCER_NAME_DELIMITER + remoteTopicName; |
| } |
| |
| @Override |
| protected boolean replicateEntries(List<Entry> entries) { |
| boolean atLeastOneMessageSentForReplication = false; |
| |
| try { |
| // This flag is set to true when we skip at least one local message, |
| // in order to skip remaining local messages. |
| boolean isLocalMessageSkippedOnce = false; |
| for (int i = 0; i < entries.size(); i++) { |
| Entry entry = entries.get(i); |
| int length = entry.getLength(); |
| ByteBuf headersAndPayload = entry.getDataBuffer(); |
| MessageImpl msg; |
| try { |
| msg = MessageImpl.deserializeSkipBrokerEntryMetaData(headersAndPayload); |
| } catch (Throwable t) { |
| log.error("[{}] Failed to deserialize message at {} (buffer size: {}): {}", replicatorId, |
| entry.getPosition(), length, t.getMessage(), t); |
| cursor.asyncDelete(entry.getPosition(), this, entry.getPosition()); |
| entry.release(); |
| continue; |
| } |
| |
| if (STATE_UPDATER.get(this) != State.Started || isLocalMessageSkippedOnce) { |
| // The producer is not ready yet after having stopped/restarted. Drop the message because it will |
| // recovered when the producer is ready |
| if (log.isDebugEnabled()) { |
| log.debug("[{}] Dropping read message at {} because producer is not ready", |
| replicatorId, entry.getPosition()); |
| } |
| isLocalMessageSkippedOnce = true; |
| entry.release(); |
| msg.recycle(); |
| continue; |
| } |
| |
| dispatchRateLimiter.ifPresent(rateLimiter -> rateLimiter.consumeDispatchQuota(1, entry.getLength())); |
| |
| msgOut.recordEvent(headersAndPayload.readableBytes()); |
| |
| msg.setReplicatedFrom(localCluster); |
| |
| msg.setMessageId(new MessageIdImpl(entry.getLedgerId(), entry.getEntryId(), -1)); |
| |
| headersAndPayload.retain(); |
| |
| // Increment pending messages for messages produced locally |
| PENDING_MESSAGES_UPDATER.incrementAndGet(this); |
| producer.sendAsync(msg, ProducerSendCallback.create(this, entry, msg)); |
| atLeastOneMessageSentForReplication = true; |
| } |
| } catch (Exception e) { |
| log.error("[{}] Unexpected exception in replication task for shadow topic: {}", |
| replicatorId, e.getMessage(), e); |
| } |
| return atLeastOneMessageSentForReplication; |
| } |
| |
| /** |
| * Cursor name fot this shadow replicator. |
| * @param replicatorPrefix |
| * @param shadowTopic |
| * @return |
| */ |
| public static String getShadowReplicatorName(String replicatorPrefix, String shadowTopic) { |
| return replicatorPrefix + "-" + Codec.encode(shadowTopic); |
| } |
| } |