org.apache.kafka.streams.processor.internals.VersionedChangelogTopicConfig Maven / Gradle / Ivy
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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.common.config.TopicConfig;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
/**
* VersionedChangelogTopicConfig captures the properties required for configuring
* the versioned store changelog topics.
*/
public class VersionedChangelogTopicConfig extends InternalTopicConfig {
private static final Map VERSIONED_STORE_CHANGELOG_TOPIC_DEFAULT_OVERRIDES;
static {
final Map tempTopicDefaultOverrides = new HashMap<>(INTERNAL_TOPIC_DEFAULT_OVERRIDES);
tempTopicDefaultOverrides.put(TopicConfig.CLEANUP_POLICY_CONFIG, TopicConfig.CLEANUP_POLICY_COMPACT);
VERSIONED_STORE_CHANGELOG_TOPIC_DEFAULT_OVERRIDES = Collections.unmodifiableMap(tempTopicDefaultOverrides);
}
private static final long VERSIONED_STORE_CHANGE_LOG_ADDITIONAL_COMPACTION_LAG_MS = 24 * 60 * 60 * 1000L;
private final long minCompactionLagMs;
VersionedChangelogTopicConfig(final String name,
final Map topicConfigs,
final long minCompactionLagMs) {
super(name, topicConfigs);
this.minCompactionLagMs = minCompactionLagMs;
}
/**
* Get the configured properties for this topic. If no {@code minCompactionLagMs} is
* provided from the topic configs, then we add
* {@code VERSIONED_STORE_CHANGE_LOG_ADDITIONAL_COMPACTION_LAG_MS} to work out the
* desired min compaction lag for cleanup.policy=compact
*
* @param windowStoreAdditionalRetentionMs added to retention for window store changelog
* topics to allow for clock drift etc. We do not reuse
* this value for versioned store changelog topic
* compaction lag as the user-facing config name is
* window store specific.
* @return Properties to be used when creating the topic
*/
@Override
public Map getProperties(final Map defaultProperties, final long windowStoreAdditionalRetentionMs) {
// internal topic config override rule: library overrides < global config overrides < per-topic config overrides
final Map topicConfig = new HashMap<>(VERSIONED_STORE_CHANGELOG_TOPIC_DEFAULT_OVERRIDES);
topicConfig.putAll(defaultProperties);
topicConfig.putAll(topicConfigs);
if (!topicConfigs.containsKey(TopicConfig.MIN_COMPACTION_LAG_MS_CONFIG)) {
long compactionLagValue;
try {
compactionLagValue = Math.addExact(minCompactionLagMs, VERSIONED_STORE_CHANGE_LOG_ADDITIONAL_COMPACTION_LAG_MS);
} catch (final ArithmeticException swallow) {
compactionLagValue = Long.MAX_VALUE;
}
topicConfig.put(TopicConfig.MIN_COMPACTION_LAG_MS_CONFIG, String.valueOf(compactionLagValue));
}
return topicConfig;
}
@Override
public boolean equals(final Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
final VersionedChangelogTopicConfig that = (VersionedChangelogTopicConfig) o;
return Objects.equals(name, that.name) &&
Objects.equals(topicConfigs, that.topicConfigs) &&
Objects.equals(minCompactionLagMs, that.minCompactionLagMs) &&
Objects.equals(enforceNumberOfPartitions, that.enforceNumberOfPartitions);
}
@Override
public int hashCode() {
return Objects.hash(name, topicConfigs, minCompactionLagMs, enforceNumberOfPartitions);
}
@Override
public String toString() {
return "VersionedChangelogTopicConfig(" +
"name=" + name +
", topicConfigs=" + topicConfigs +
", minCompactionLagMs=" + minCompactionLagMs +
", enforceNumberOfPartitions=" + enforceNumberOfPartitions +
")";
}
}