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/*
* 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.client.impl;
import org.apache.pulsar.shade.com.google.common.annotations.VisibleForTesting;
import org.apache.pulsar.shade.io.netty.buffer.ByteBuf;
import org.apache.pulsar.shade.io.netty.buffer.ByteBufAllocator;
import org.apache.pulsar.shade.io.netty.util.ReferenceCountUtil;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import lombok.Getter;
import lombok.Setter;
import org.apache.pulsar.client.api.PulsarClientException;
import org.apache.pulsar.client.impl.ProducerImpl.OpSendMsg;
import org.apache.pulsar.common.allocator.PulsarByteBufAllocator;
import org.apache.pulsar.common.api.proto.CompressionType;
import org.apache.pulsar.common.api.proto.MessageMetadata;
import org.apache.pulsar.common.protocol.ByteBufPair;
import org.apache.pulsar.common.protocol.Commands;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Default batch message container.
*
* incoming single messages:
* (k1, v1), (k2, v1), (k3, v1), (k1, v2), (k2, v2), (k3, v2), (k1, v3), (k2, v3), (k3, v3)
*
* batched into single batch message:
* [(k1, v1), (k2, v1), (k3, v1), (k1, v2), (k2, v2), (k3, v2), (k1, v3), (k2, v3), (k3, v3)]
*/
class BatchMessageContainerImpl extends AbstractBatchMessageContainer {
protected MessageMetadata messageMetadata = new MessageMetadata();
// sequence id for this batch which will be persisted as a single entry by broker
@Getter
@Setter
protected long lowestSequenceId = -1L;
@Getter
@Setter
protected long highestSequenceId = -1L;
protected ByteBuf batchedMessageMetadataAndPayload;
protected List> messages = new ArrayList<>(maxMessagesNum);
protected SendCallback previousCallback = null;
// keep track of callbacks for individual messages being published in a batch
protected SendCallback firstCallback;
protected final ByteBufAllocator allocator;
private static final int SHRINK_COOLING_OFF_PERIOD = 10;
private int consecutiveShrinkTime = 0;
public BatchMessageContainerImpl() {
this(PulsarByteBufAllocator.DEFAULT);
}
/**
* This constructor is for testing only. The global allocator is always
* {@link PulsarByteBufAllocator#DEFAULT}.
*/
@VisibleForTesting
BatchMessageContainerImpl(ByteBufAllocator allocator) {
this.allocator = allocator;
}
public BatchMessageContainerImpl(ProducerImpl producer) {
this();
setProducer(producer);
}
@Override
public boolean add(MessageImpl msg, SendCallback callback) {
if (log.isDebugEnabled()) {
log.debug("[{}] [{}] add message to batch, num messages in batch so far {}", topicName,
producer.getProducerName(), numMessagesInBatch);
}
if (++numMessagesInBatch == 1) {
try {
// some properties are common amongst the different messages in the batch, hence we just pick it up from
// the first message
messageMetadata.setSequenceId(msg.getSequenceId());
lowestSequenceId = Commands.initBatchMessageMetadata(messageMetadata, msg.getMessageBuilder());
this.firstCallback = callback;
batchedMessageMetadataAndPayload = allocator.buffer(
Math.min(maxBatchSize, getMaxMessageSize()));
updateAndReserveBatchAllocatedSize(batchedMessageMetadataAndPayload.capacity());
if (msg.getMessageBuilder().hasTxnidMostBits() && currentTxnidMostBits == -1) {
currentTxnidMostBits = msg.getMessageBuilder().getTxnidMostBits();
}
if (msg.getMessageBuilder().hasTxnidLeastBits() && currentTxnidLeastBits == -1) {
currentTxnidLeastBits = msg.getMessageBuilder().getTxnidLeastBits();
}
} catch (Throwable e) {
log.error("construct first message failed, exception is ", e);
if (producer != null) {
producer.semaphoreRelease(getNumMessagesInBatch());
producer.client.getMemoryLimitController().releaseMemory(msg.getUncompressedSize()
+ batchAllocatedSizeBytes);
}
discard(new PulsarClientException(e));
return false;
}
}
if (previousCallback != null) {
previousCallback.addCallback(msg, callback);
}
previousCallback = callback;
currentBatchSizeBytes += msg.getDataBuffer().readableBytes();
messages.add(msg);
tryUpdateTimestamp();
if (lowestSequenceId == -1L) {
lowestSequenceId = msg.getSequenceId();
messageMetadata.setSequenceId(lowestSequenceId);
}
highestSequenceId = msg.getSequenceId();
if (producer != null) {
ProducerImpl.LAST_SEQ_ID_PUSHED_UPDATER.getAndUpdate(producer, prev -> Math.max(prev, msg.getSequenceId()));
}
return isBatchFull();
}
protected ByteBuf getCompressedBatchMetadataAndPayload() {
int batchWriteIndex = batchedMessageMetadataAndPayload.writerIndex();
int batchReadIndex = batchedMessageMetadataAndPayload.readerIndex();
for (int i = 0, n = messages.size(); i < n; i++) {
MessageImpl msg = messages.get(i);
msg.getDataBuffer().markReaderIndex();
try {
if (n == 1) {
batchedMessageMetadataAndPayload.writeBytes(msg.getDataBuffer());
} else {
batchedMessageMetadataAndPayload = Commands.serializeSingleMessageInBatchWithPayload(
msg.getMessageBuilder(), msg.getDataBuffer(), batchedMessageMetadataAndPayload);
}
} catch (Throwable th) {
// serializing batch message can corrupt the index of message and batch-message. Reset the index so,
// next iteration doesn't send corrupt message to broker.
for (int j = 0; j <= i; j++) {
MessageImpl previousMsg = messages.get(j);
previousMsg.getDataBuffer().resetReaderIndex();
}
batchedMessageMetadataAndPayload.writerIndex(batchWriteIndex);
batchedMessageMetadataAndPayload.readerIndex(batchReadIndex);
throw new RuntimeException(th);
}
}
int uncompressedSize = batchedMessageMetadataAndPayload.readableBytes();
ByteBuf compressedPayload = compressor.encode(batchedMessageMetadataAndPayload);
batchedMessageMetadataAndPayload.release();
if (compressionType != CompressionType.NONE) {
messageMetadata.setCompression(compressionType);
messageMetadata.setUncompressedSize(uncompressedSize);
}
// Update the current max batch size using the uncompressed size, which is what we need in any case to
// accumulate the batch content
updateMaxBatchSize(uncompressedSize);
maxMessagesNum = Math.max(maxMessagesNum, numMessagesInBatch);
return compressedPayload;
}
void updateMaxBatchSize(int uncompressedSize) {
if (uncompressedSize > maxBatchSize) {
maxBatchSize = uncompressedSize;
consecutiveShrinkTime = 0;
} else {
int shrank = maxBatchSize - (maxBatchSize >> 2);
if (uncompressedSize <= shrank) {
if (consecutiveShrinkTime <= SHRINK_COOLING_OFF_PERIOD) {
consecutiveShrinkTime++;
} else {
maxBatchSize = shrank;
consecutiveShrinkTime = 0;
}
} else {
consecutiveShrinkTime = 0;
}
}
}
@Override
public void clear() {
clearTimestamp();
messages = new ArrayList<>(maxMessagesNum);
firstCallback = null;
previousCallback = null;
messageMetadata.clear();
numMessagesInBatch = 0;
currentBatchSizeBytes = 0;
lowestSequenceId = -1L;
highestSequenceId = -1L;
batchedMessageMetadataAndPayload = null;
currentTxnidMostBits = -1L;
currentTxnidLeastBits = -1L;
batchAllocatedSizeBytes = 0;
}
@Override
public boolean isEmpty() {
return messages.isEmpty();
}
@Override
public void discard(Exception ex) {
try {
// Need to protect ourselves from any exception being thrown in the future handler from the application
if (firstCallback != null) {
firstCallback.sendComplete(ex);
}
if (batchedMessageMetadataAndPayload != null) {
ReferenceCountUtil.safeRelease(batchedMessageMetadataAndPayload);
batchedMessageMetadataAndPayload = null;
}
} catch (Throwable t) {
log.warn("[{}] [{}] Got exception while completing the callback for msg {}:", topicName,
producer.getProducerName(), lowestSequenceId, t);
}
clear();
}
@Override
public boolean isMultiBatches() {
return false;
}
@Override
public OpSendMsg createOpSendMsg() throws IOException {
if (messages.size() == 1) {
messageMetadata.clear();
messageMetadata.copyFrom(messages.get(0).getMessageBuilder());
ByteBuf encryptedPayload = producer.encryptMessage(messageMetadata, getCompressedBatchMetadataAndPayload());
updateAndReserveBatchAllocatedSize(encryptedPayload.capacity());
ByteBufPair cmd = producer.sendMessage(producer.producerId, messageMetadata.getSequenceId(),
1, null, messageMetadata, encryptedPayload);
final OpSendMsg op;
// Shouldn't call create(MessageImpl msg, ByteBufPair cmd, long sequenceId, SendCallback callback),
// otherwise it will bring message out of order problem.
// Because when invoke `ProducerImpl.processOpSendMsg` on flush,
// if `op.msg != null && isBatchMessagingEnabled()` checks true, it will call `batchMessageAndSend` to flush
// messageContainers before publishing this one-batch message.
op = OpSendMsg.create(messages, cmd, messageMetadata.getSequenceId(), firstCallback,
batchAllocatedSizeBytes);
// NumMessagesInBatch and BatchSizeByte will not be serialized to the binary cmd. It's just useful for the
// ProducerStats
op.setNumMessagesInBatch(1);
op.setBatchSizeByte(encryptedPayload.readableBytes());
// handle mgs size check as non-batched in `ProducerImpl.isMessageSizeExceeded`
if (op.getMessageHeaderAndPayloadSize() > getMaxMessageSize()) {
producer.semaphoreRelease(1);
producer.client.getMemoryLimitController().releaseMemory(
messages.get(0).getUncompressedSize() + batchAllocatedSizeBytes);
discard(new PulsarClientException.InvalidMessageException(
"Message size is bigger than " + getMaxMessageSize() + " bytes"));
return null;
}
lowestSequenceId = -1L;
return op;
}
ByteBuf encryptedPayload = producer.encryptMessage(messageMetadata, getCompressedBatchMetadataAndPayload());
updateAndReserveBatchAllocatedSize(encryptedPayload.capacity());
if (encryptedPayload.readableBytes() > getMaxMessageSize()) {
producer.semaphoreRelease(messages.size());
messages.forEach(msg -> producer.client.getMemoryLimitController()
.releaseMemory(msg.getUncompressedSize()));
producer.client.getMemoryLimitController().releaseMemory(batchAllocatedSizeBytes);
discard(new PulsarClientException.InvalidMessageException(
"Message size is bigger than " + getMaxMessageSize() + " bytes"));
return null;
}
messageMetadata.setNumMessagesInBatch(numMessagesInBatch);
messageMetadata.setSequenceId(lowestSequenceId);
messageMetadata.setHighestSequenceId(highestSequenceId);
if (currentTxnidMostBits != -1) {
messageMetadata.setTxnidMostBits(currentTxnidMostBits);
}
if (currentTxnidLeastBits != -1) {
messageMetadata.setTxnidLeastBits(currentTxnidLeastBits);
}
ByteBufPair cmd = producer.sendMessage(producer.producerId, messageMetadata.getSequenceId(),
messageMetadata.getHighestSequenceId(), numMessagesInBatch, messageMetadata, encryptedPayload);
if (log.isDebugEnabled()) {
log.debug("[{}] [{}] Build batch msg seq:{}, highest-seq:{}, numMessagesInBatch: {}, uncompressedSize: {},"
+ " payloadSize: {}", topicName, producer.getProducerName(),
messageMetadata.getSequenceId(), messageMetadata.getNumMessagesInBatch(),
messageMetadata.getHighestSequenceId(),
messageMetadata.getUncompressedSize(), encryptedPayload.readableBytes());
}
OpSendMsg op = OpSendMsg.create(messages, cmd, messageMetadata.getSequenceId(),
messageMetadata.getHighestSequenceId(), firstCallback, batchAllocatedSizeBytes);
op.setNumMessagesInBatch(numMessagesInBatch);
op.setBatchSizeByte(currentBatchSizeBytes);
lowestSequenceId = -1L;
return op;
}
protected void updateAndReserveBatchAllocatedSize(int updatedSizeBytes) {
int delta = updatedSizeBytes - batchAllocatedSizeBytes;
batchAllocatedSizeBytes = updatedSizeBytes;
if (producer != null) {
if (delta > 0) {
producer.client.getMemoryLimitController().forceReserveMemory(delta);
} else if (delta < 0) {
producer.client.getMemoryLimitController().releaseMemory(-delta);
}
}
}
@Override
public boolean hasSameSchema(MessageImpl msg) {
if (numMessagesInBatch == 0) {
return true;
}
if (!messageMetadata.hasSchemaVersion()) {
return msg.getSchemaVersion() == null;
}
return Arrays.equals(msg.getSchemaVersion(), messageMetadata.getSchemaVersion());
}
private static final Logger log = LoggerFactory.getLogger(BatchMessageContainerImpl.class);
}
