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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.streams.processor.internals;
import org.apache.kafka.clients.admin.Admin;
import org.apache.kafka.clients.admin.ListOffsetsResult;
import org.apache.kafka.clients.admin.ListOffsetsResult.ListOffsetsResultInfo;
import org.apache.kafka.clients.admin.OffsetSpec;
import org.apache.kafka.clients.consumer.Consumer;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.common.KafkaException;
import org.apache.kafka.common.KafkaFuture;
import org.apache.kafka.common.Metric;
import org.apache.kafka.common.MetricName;
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.errors.TimeoutException;
import org.apache.kafka.common.header.Header;
import org.apache.kafka.common.header.Headers;
import org.apache.kafka.common.utils.Utils;
import org.apache.kafka.streams.StreamsConfig;
import org.apache.kafka.streams.errors.StreamsException;
import org.apache.kafka.streams.processor.TaskId;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import java.util.function.Function;
import java.util.stream.Collectors;
public class ClientUtils {
private static final Logger LOG = LoggerFactory.getLogger(ClientUtils.class);
public static final class QuietStreamsConfig extends StreamsConfig {
public QuietStreamsConfig(final Map props) {
super(props, false);
}
}
public static final class QuietConsumerConfig extends ConsumerConfig {
public QuietConsumerConfig(final Map props) {
super(props, false);
}
}
// currently admin client is shared among all threads
public static String getSharedAdminClientId(final String clientId) {
return clientId + "-admin";
}
public static String getConsumerClientId(final String threadClientId) {
return threadClientId + "-consumer";
}
public static String getRestoreConsumerClientId(final String threadClientId) {
return threadClientId + "-restore-consumer";
}
public static String getThreadProducerClientId(final String threadClientId) {
return threadClientId + "-producer";
}
public static String getTaskProducerClientId(final String threadClientId, final TaskId taskId) {
return threadClientId + "-" + taskId + "-producer";
}
public static Map consumerMetrics(final Consumer mainConsumer,
final Consumer restoreConsumer) {
final Map consumerMetrics = mainConsumer.metrics();
final Map restoreConsumerMetrics = restoreConsumer.metrics();
final LinkedHashMap result = new LinkedHashMap<>();
result.putAll(consumerMetrics);
result.putAll(restoreConsumerMetrics);
return result;
}
public static Map adminClientMetrics(final Admin adminClient) {
final Map adminClientMetrics = adminClient.metrics();
return new LinkedHashMap<>(adminClientMetrics);
}
public static Map producerMetrics(final Collection producers) {
final Map result = new LinkedHashMap<>();
for (final StreamsProducer producer : producers) {
final Map producerMetrics = producer.metrics();
if (producerMetrics != null) {
result.putAll(producerMetrics);
}
}
return result;
}
/**
* @throws StreamsException if the consumer throws an exception
* @throws org.apache.kafka.common.errors.TimeoutException if the request times out
*/
public static Map fetchCommittedOffsets(final Set partitions,
final Consumer consumer) {
if (partitions.isEmpty()) {
return Collections.emptyMap();
}
final Map committedOffsets;
try {
// those which do not have a committed offset would default to 0
committedOffsets = consumer.committed(partitions).entrySet().stream()
.collect(Collectors.toMap(Map.Entry::getKey, e -> e.getValue() == null ? 0L : e.getValue().offset()));
} catch (final TimeoutException timeoutException) {
LOG.warn("The committed offsets request timed out, try increasing the consumer client's default.api.timeout.ms", timeoutException);
throw timeoutException;
} catch (final KafkaException fatal) {
LOG.warn("The committed offsets request failed.", fatal);
throw new StreamsException(String.format("Failed to retrieve end offsets for %s", partitions), fatal);
}
return committedOffsets;
}
public static KafkaFuture> fetchEndOffsetsFuture(final Collection partitions,
final Admin adminClient) {
return adminClient.listOffsets(
partitions.stream().collect(Collectors.toMap(Function.identity(), tp -> OffsetSpec.latest()))
).all();
}
public static ListOffsetsResult fetchEndOffsetsResult(final Collection partitions,
final Admin adminClient) {
return adminClient.listOffsets(
partitions.stream().collect(Collectors.toMap(Function.identity(), tp -> OffsetSpec.latest()))
);
}
public static Map getEndOffsets(final ListOffsetsResult resultFuture,
final Collection partitions) {
final Map result = new HashMap<>();
for (final TopicPartition partition : partitions) {
try {
final KafkaFuture future = resultFuture.partitionResult(partition);
if (future == null) {
// this NPE -> IllegalStateE translation is needed
// to keep exception throwing behavior consistent
throw new IllegalStateException("Could not get end offset for " + partition);
}
result.put(partition, future.get());
} catch (final ExecutionException e) {
final Throwable cause = e.getCause();
final String msg = String.format("Error while attempting to read end offsets for partition '%s'", partition.toString());
throw new StreamsException(msg, cause);
} catch (final InterruptedException e) {
Thread.interrupted();
final String msg = String.format("Interrupted while attempting to read end offsets for partition '%s'", partition.toString());
throw new StreamsException(msg, e);
}
}
return result;
}
/**
* A helper method that wraps the {@code Future#get} call and rethrows any thrown exception as a StreamsException
* @throws StreamsException if the admin client request throws an exception
*/
public static Map getEndOffsets(final KafkaFuture> endOffsetsFuture) {
try {
return endOffsetsFuture.get();
} catch (final RuntimeException | InterruptedException | ExecutionException e) {
LOG.warn("The listOffsets request failed.", e);
throw new StreamsException("Unable to obtain end offsets from kafka", e);
}
}
/**
* @throws StreamsException if the admin client request throws an exception
*/
public static Map fetchEndOffsets(final Collection partitions,
final Admin adminClient) {
if (partitions.isEmpty()) {
return Collections.emptyMap();
}
return getEndOffsets(fetchEndOffsetsFuture(partitions, adminClient));
}
public static String extractThreadId(final String fullThreadName) {
final int index = fullThreadName.indexOf("StreamThread-");
return fullThreadName.substring(index);
}
public static long producerRecordSizeInBytes(final ProducerRecord record) {
return recordSizeInBytes(
record.key() == null ? 0 : record.key().length,
record.value() == null ? 0 : record.value().length,
record.topic(),
record.headers()
);
}
public static long consumerRecordSizeInBytes(final ConsumerRecord record) {
return recordSizeInBytes(
record.serializedKeySize(),
record.serializedValueSize(),
record.topic(),
record.headers()
);
}
private static long recordSizeInBytes(final long keyBytes,
final long valueBytes,
final String topic,
final Headers headers) {
long headerSizeInBytes = 0L;
if (headers != null) {
for (final Header header : headers.toArray()) {
headerSizeInBytes += Utils.utf8(header.key()).length;
if (header.value() != null) {
headerSizeInBytes += header.value().length;
}
}
}
return keyBytes +
valueBytes +
8L + // timestamp
8L + // offset
Utils.utf8(topic).length +
4L + // partition
headerSizeInBytes;
}
}
