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Apache Jena Fuseki server Kafka connector
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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.kafka.common.requests;
import org.apache.kafka.common.InvalidRecordException;
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.errors.UnsupportedCompressionTypeException;
import org.apache.kafka.common.message.ProduceRequestData;
import org.apache.kafka.common.message.ProduceResponseData;
import org.apache.kafka.common.protocol.ApiKeys;
import org.apache.kafka.common.protocol.ByteBufferAccessor;
import org.apache.kafka.common.protocol.Errors;
import org.apache.kafka.common.record.BaseRecords;
import org.apache.kafka.common.record.CompressionType;
import org.apache.kafka.common.record.RecordBatch;
import org.apache.kafka.common.record.Records;
import org.apache.kafka.common.utils.Utils;
import java.nio.ByteBuffer;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.stream.Collectors;
import static org.apache.kafka.common.requests.ProduceResponse.INVALID_OFFSET;
public class ProduceRequest extends AbstractRequest {
public static Builder forMagic(byte magic, ProduceRequestData data) {
// Message format upgrades correspond with a bump in the produce request version. Older
// message format versions are generally not supported by the produce request versions
// following the bump.
final short minVersion;
final short maxVersion;
if (magic < RecordBatch.MAGIC_VALUE_V2) {
minVersion = 2;
maxVersion = 2;
} else {
minVersion = 3;
maxVersion = ApiKeys.PRODUCE.latestVersion();
}
return new Builder(minVersion, maxVersion, data);
}
public static Builder forCurrentMagic(ProduceRequestData data) {
return forMagic(RecordBatch.CURRENT_MAGIC_VALUE, data);
}
public static class Builder extends AbstractRequest.Builder {
private final ProduceRequestData data;
public Builder(short minVersion,
short maxVersion,
ProduceRequestData data) {
super(ApiKeys.PRODUCE, minVersion, maxVersion);
this.data = data;
}
@Override
public ProduceRequest build(short version) {
return build(version, true);
}
// Visible for testing only
public ProduceRequest buildUnsafe(short version) {
return build(version, false);
}
private ProduceRequest build(short version, boolean validate) {
if (validate) {
// Validate the given records first
data.topicData().forEach(tpd ->
tpd.partitionData().forEach(partitionProduceData ->
ProduceRequest.validateRecords(version, partitionProduceData.records())));
}
return new ProduceRequest(data, version);
}
@Override
public String toString() {
StringBuilder bld = new StringBuilder();
bld.append("(type=ProduceRequest")
.append(", acks=").append(data.acks())
.append(", timeout=").append(data.timeoutMs())
.append(", partitionRecords=(").append(data.topicData().stream().flatMap(d -> d.partitionData().stream()).collect(Collectors.toList()))
.append("), transactionalId='").append(data.transactionalId() != null ? data.transactionalId() : "")
.append("'");
return bld.toString();
}
}
/**
* We have to copy acks, timeout, transactionalId and partitionSizes from data since data maybe reset to eliminate
* the reference to ByteBuffer but those metadata are still useful.
*/
private final short acks;
private final int timeout;
private final String transactionalId;
// This is set to null by `clearPartitionRecords` to prevent unnecessary memory retention when a produce request is
// put in the purgatory (due to client throttling, it can take a while before the response is sent).
// Care should be taken in methods that use this field.
private volatile ProduceRequestData data;
// the partitionSizes is lazily initialized since it is used by server-side in production.
private volatile Map partitionSizes;
public ProduceRequest(ProduceRequestData produceRequestData, short version) {
super(ApiKeys.PRODUCE, version);
this.data = produceRequestData;
this.acks = data.acks();
this.timeout = data.timeoutMs();
this.transactionalId = data.transactionalId();
}
// visible for testing
Map partitionSizes() {
if (partitionSizes == null) {
// this method may be called by different thread (see the comment on data)
synchronized (this) {
if (partitionSizes == null) {
Map tmpPartitionSizes = new HashMap<>();
data.topicData().forEach(topicData ->
topicData.partitionData().forEach(partitionData ->
tmpPartitionSizes.compute(new TopicPartition(topicData.name(), partitionData.index()),
(ignored, previousValue) ->
partitionData.records().sizeInBytes() + (previousValue == null ? 0 : previousValue))
)
);
partitionSizes = tmpPartitionSizes;
}
}
}
return partitionSizes;
}
/**
* @return data or IllegalStateException if the data is removed (to prevent unnecessary memory retention).
*/
@Override
public ProduceRequestData data() {
// Store it in a local variable to protect against concurrent updates
ProduceRequestData tmp = data;
if (tmp == null)
throw new IllegalStateException("The partition records are no longer available because clearPartitionRecords() has been invoked.");
return tmp;
}
@Override
public String toString(boolean verbose) {
// Use the same format as `Struct.toString()`
StringBuilder bld = new StringBuilder();
bld.append("{acks=").append(acks)
.append(",timeout=").append(timeout);
if (verbose)
bld.append(",partitionSizes=").append(Utils.mkString(partitionSizes(), "[", "]", "=", ","));
else
bld.append(",numPartitions=").append(partitionSizes().size());
bld.append("}");
return bld.toString();
}
@Override
public ProduceResponse getErrorResponse(int throttleTimeMs, Throwable e) {
/* In case the producer doesn't actually want any response */
if (acks == 0) return null;
ApiError apiError = ApiError.fromThrowable(e);
ProduceResponseData data = new ProduceResponseData().setThrottleTimeMs(throttleTimeMs);
partitionSizes().forEach((tp, ignored) -> {
ProduceResponseData.TopicProduceResponse tpr = data.responses().find(tp.topic());
if (tpr == null) {
tpr = new ProduceResponseData.TopicProduceResponse().setName(tp.topic());
data.responses().add(tpr);
}
tpr.partitionResponses().add(new ProduceResponseData.PartitionProduceResponse()
.setIndex(tp.partition())
.setRecordErrors(Collections.emptyList())
.setBaseOffset(INVALID_OFFSET)
.setLogAppendTimeMs(RecordBatch.NO_TIMESTAMP)
.setLogStartOffset(INVALID_OFFSET)
.setErrorMessage(apiError.message())
.setErrorCode(apiError.error().code()));
});
return new ProduceResponse(data);
}
@Override
public Map errorCounts(Throwable e) {
Errors error = Errors.forException(e);
return Collections.singletonMap(error, partitionSizes().size());
}
public short acks() {
return acks;
}
public int timeout() {
return timeout;
}
public String transactionalId() {
return transactionalId;
}
public void clearPartitionRecords() {
// lazily initialize partitionSizes.
partitionSizes();
data = null;
}
public static void validateRecords(short version, BaseRecords baseRecords) {
if (version >= 3) {
if (baseRecords instanceof Records) {
Records records = (Records) baseRecords;
Iterator iterator = records.batches().iterator();
if (!iterator.hasNext())
throw new InvalidRecordException("Produce requests with version " + version + " must have at least " +
"one record batch per partition");
RecordBatch entry = iterator.next();
if (entry.magic() != RecordBatch.MAGIC_VALUE_V2)
throw new InvalidRecordException("Produce requests with version " + version + " are only allowed to " +
"contain record batches with magic version 2");
if (version < 7 && entry.compressionType() == CompressionType.ZSTD) {
throw new UnsupportedCompressionTypeException("Produce requests with version " + version + " are not allowed to " +
"use ZStandard compression");
}
if (iterator.hasNext())
throw new InvalidRecordException("Produce requests with version " + version + " are only allowed to " +
"contain exactly one record batch per partition");
}
}
// Note that we do not do similar validation for older versions to ensure compatibility with
// clients which send the wrong magic version in the wrong version of the produce request. The broker
// did not do this validation before, so we maintain that behavior here.
}
public static ProduceRequest parse(ByteBuffer buffer, short version) {
return new ProduceRequest(new ProduceRequestData(new ByteBufferAccessor(buffer), version), version);
}
public static byte requiredMagicForVersion(short produceRequestVersion) {
if (produceRequestVersion < ApiKeys.PRODUCE.oldestVersion() || produceRequestVersion > ApiKeys.PRODUCE.latestVersion())
throw new IllegalArgumentException("Magic value to use for produce request version " +
produceRequestVersion + " is not known");
switch (produceRequestVersion) {
case 0:
case 1:
return RecordBatch.MAGIC_VALUE_V0;
case 2:
return RecordBatch.MAGIC_VALUE_V1;
default:
return RecordBatch.MAGIC_VALUE_V2;
}
}
}