kafka UnwindowedChangelogTopicConfig 源码

kafka UnwindowedChangelogTopicConfig 代码

文件路径：/streams/src/main/java/org/apache/kafka/streams/processor/internals/UnwindowedChangelogTopicConfig.java

/*
 * 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;

/**
 * UnwindowedChangelogTopicConfig captures the properties required for configuring
 * the un-windowed store changelog topics.
 */
public class UnwindowedChangelogTopicConfig extends InternalTopicConfig {
    private static final Map<String, String> UNWINDOWED_STORE_CHANGELOG_TOPIC_DEFAULT_OVERRIDES;
    static {
        final Map<String, String> tempTopicDefaultOverrides = new HashMap<>(INTERNAL_TOPIC_DEFAULT_OVERRIDES);
        tempTopicDefaultOverrides.put(TopicConfig.CLEANUP_POLICY_CONFIG, TopicConfig.CLEANUP_POLICY_COMPACT);
        UNWINDOWED_STORE_CHANGELOG_TOPIC_DEFAULT_OVERRIDES = Collections.unmodifiableMap(tempTopicDefaultOverrides);
    }

    UnwindowedChangelogTopicConfig(final String name, final Map<String, String> topicConfigs) {
        super(name, topicConfigs);
    }

    /**
     * Get the configured properties for this topic. If retentionMs is set then
     * we add additionalRetentionMs to work out the desired retention when cleanup.policy=compact,delete
     *
     * @param additionalRetentionMs - added to retention to allow for clock drift etc
     * @return Properties to be used when creating the topic
     */
    @Override
    public Map<String, String> getProperties(final Map<String, String> defaultProperties, final long additionalRetentionMs) {
        // internal topic config overridden rule: library overrides < global config overrides < per-topic config overrides
        final Map<String, String> topicConfig = new HashMap<>(UNWINDOWED_STORE_CHANGELOG_TOPIC_DEFAULT_OVERRIDES);

        topicConfig.putAll(defaultProperties);

        topicConfig.putAll(topicConfigs);

        return topicConfig;
    }

    @Override
    public boolean equals(final Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        final UnwindowedChangelogTopicConfig that = (UnwindowedChangelogTopicConfig) o;
        return Objects.equals(name, that.name) &&
               Objects.equals(topicConfigs, that.topicConfigs) &&
               Objects.equals(enforceNumberOfPartitions, that.enforceNumberOfPartitions);
    }

    @Override
    public int hashCode() {
        return Objects.hash(name, topicConfigs, enforceNumberOfPartitions);
    }

    @Override
    public String toString() {
        return "UnwindowedChangelogTopicConfig(" +
                "name=" + name +
                ", topicConfigs=" + topicConfigs +
                ", enforceNumberOfPartitions=" + enforceNumberOfPartitions +
                ")";
    }
}

相关信息

kafka 源码目录

相关文章

kafka AbstractProcessorContext 源码

kafka AbstractReadOnlyDecorator 源码

kafka AbstractReadWriteDecorator 源码

kafka AbstractTask 源码

kafka ActiveTaskCreator 源码

kafka ChangelogReader 源码

kafka ChangelogRecordDeserializationHelper 源码

kafka ChangelogRegister 源码

kafka ChangelogTopics 源码

kafka ClientUtils 源码