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KAFKA-16666 Migrate
TransactionLogMessageFormatter to tools module (a…
…pache#16019) Reviewers: Chia-Ping Tsai <[email protected]>
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105 changes: 105 additions & 0 deletions
105
tools/src/main/java/org/apache/kafka/tools/consumer/TransactionLogMessageFormatter.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| /* | ||
| * 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.tools.consumer; | ||
|
|
||
| import org.apache.kafka.clients.consumer.ConsumerRecord; | ||
| import org.apache.kafka.common.MessageFormatter; | ||
| import org.apache.kafka.common.protocol.ByteBufferAccessor; | ||
| import org.apache.kafka.coordinator.transaction.generated.TransactionLogKey; | ||
| import org.apache.kafka.coordinator.transaction.generated.TransactionLogKeyJsonConverter; | ||
| import org.apache.kafka.coordinator.transaction.generated.TransactionLogValue; | ||
| import org.apache.kafka.coordinator.transaction.generated.TransactionLogValueJsonConverter; | ||
|
|
||
| import com.fasterxml.jackson.databind.JsonNode; | ||
| import com.fasterxml.jackson.databind.node.JsonNodeFactory; | ||
| import com.fasterxml.jackson.databind.node.NullNode; | ||
| import com.fasterxml.jackson.databind.node.ObjectNode; | ||
| import com.fasterxml.jackson.databind.node.TextNode; | ||
|
|
||
| import java.io.IOException; | ||
| import java.io.PrintStream; | ||
| import java.nio.ByteBuffer; | ||
| import java.util.Objects; | ||
| import java.util.Optional; | ||
|
|
||
| import static java.nio.charset.StandardCharsets.UTF_8; | ||
|
|
||
| public class TransactionLogMessageFormatter implements MessageFormatter { | ||
|
|
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| private static final String VERSION = "version"; | ||
| private static final String DATA = "data"; | ||
| private static final String KEY = "key"; | ||
| private static final String VALUE = "value"; | ||
| private static final String UNKNOWN = "unknown"; | ||
|
|
||
| @Override | ||
| public void writeTo(ConsumerRecord<byte[], byte[]> consumerRecord, PrintStream output) { | ||
| ObjectNode json = new ObjectNode(JsonNodeFactory.instance); | ||
|
|
||
| byte[] key = consumerRecord.key(); | ||
| if (Objects.nonNull(key)) { | ||
| short keyVersion = ByteBuffer.wrap(key).getShort(); | ||
| JsonNode dataNode = readToTransactionLogKey(ByteBuffer.wrap(key)) | ||
| .map(logKey -> TransactionLogKeyJsonConverter.write(logKey, keyVersion)) | ||
| .orElseGet(() -> new TextNode(UNKNOWN)); | ||
| json.putObject(KEY) | ||
| .put(VERSION, keyVersion) | ||
| .set(DATA, dataNode); | ||
| } else { | ||
| json.set(KEY, NullNode.getInstance()); | ||
| } | ||
|
|
||
| byte[] value = consumerRecord.value(); | ||
| if (Objects.nonNull(value)) { | ||
| short valueVersion = ByteBuffer.wrap(value).getShort(); | ||
| JsonNode dataNode = readToTransactionLogValue(ByteBuffer.wrap(value)) | ||
| .map(logValue -> TransactionLogValueJsonConverter.write(logValue, valueVersion)) | ||
| .orElseGet(() -> new TextNode(UNKNOWN)); | ||
| json.putObject(VALUE) | ||
| .put(VERSION, valueVersion) | ||
| .set(DATA, dataNode); | ||
| } else { | ||
| json.set(VALUE, NullNode.getInstance()); | ||
| } | ||
|
|
||
| try { | ||
| output.write(json.toString().getBytes(UTF_8)); | ||
| } catch (IOException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
|
|
||
| private Optional<TransactionLogKey> readToTransactionLogKey(ByteBuffer byteBuffer) { | ||
| short version = byteBuffer.getShort(); | ||
| if (version >= TransactionLogKey.LOWEST_SUPPORTED_VERSION | ||
| && version <= TransactionLogKey.HIGHEST_SUPPORTED_VERSION) { | ||
| return Optional.of(new TransactionLogKey(new ByteBufferAccessor(byteBuffer), version)); | ||
| } else { | ||
| return Optional.empty(); | ||
| } | ||
| } | ||
|
|
||
| private Optional<TransactionLogValue> readToTransactionLogValue(ByteBuffer byteBuffer) { | ||
| short version = byteBuffer.getShort(); | ||
| if (version >= TransactionLogValue.LOWEST_SUPPORTED_VERSION | ||
| && version <= TransactionLogValue.HIGHEST_SUPPORTED_VERSION) { | ||
| return Optional.of(new TransactionLogValue(new ByteBufferAccessor(byteBuffer), version)); | ||
| } else { | ||
| return Optional.empty(); | ||
| } | ||
| } | ||
| } |
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