content: /*
   * 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;
  
  /**
   * WindowedChangelogTopicConfig captures the properties required for configuring
   * the windowed store changelog topics.
   */
  public class WindowedChangelogTopicConfig extends InternalTopicConfig {
      private static final Map<String, String> WINDOWED_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 + "," + TopicConfig.CLEANUP_POLICY_DELETE);
          WINDOWED_STORE_CHANGELOG_TOPIC_DEFAULT_OVERRIDES = Collections.unmodifiableMap(tempTopicDefaultOverrides);
      }
  
      private final long retentionMs;
  
      WindowedChangelogTopicConfig(final String name, final Map<String, String> topicConfigs, final long retentionMs) {
          super(name, topicConfigs);
          this.retentionMs = retentionMs;
      }
  
      /**
       * Get the configured properties for this topic. If no retentionMs override is provided from
       * the topic configs, 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> properties(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<>(WINDOWED_STORE_CHANGELOG_TOPIC_DEFAULT_OVERRIDES);
  
          topicConfig.putAll(defaultProperties);
  
          topicConfig.putAll(topicConfigs);
  
          if (!topicConfigs.containsKey(TopicConfig.RETENTION_MS_CONFIG)) {
              long retentionValue;
              try {
                  retentionValue = Math.addExact(retentionMs, additionalRetentionMs);
              } catch (final ArithmeticException swallow) {
                  retentionValue = Long.MAX_VALUE;
              }
              topicConfig.put(TopicConfig.RETENTION_MS_CONFIG, String.valueOf(retentionValue));
          }
  
          return topicConfig;
      }
  
      @Override
      public boolean equals(final Object o) {
          if (this == o) {
              return true;
          }
          if (o == null || getClass() != o.getClass()) {
              return false;
          }
          final WindowedChangelogTopicConfig that = (WindowedChangelogTopicConfig) o;
          return Objects.equals(name, that.name) &&
                 Objects.equals(topicConfigs, that.topicConfigs) &&
                 Objects.equals(retentionMs, that.retentionMs) &&
                 Objects.equals(enforceNumberOfPartitions, that.enforceNumberOfPartitions);
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(name, topicConfigs, retentionMs, enforceNumberOfPartitions);
      }
  
      @Override
      public String toString() {
          return "WindowedChangelogTopicConfig(" +
                  "name=" + name +
                  ", topicConfigs=" + topicConfigs +
                  ", retentionMs=" + retentionMs +
                  ", enforceNumberOfPartitions=" + enforceNumberOfPartitions +
                  ")";
      }
  }
  