Package kafka.server.share

Class SharePartitionCache

java.lang.Object
kafka.server.share.SharePartitionCache
public class SharePartitionCache extends Object
The SharePartitionCache is used to cache the SharePartition objects. The cache is thread-safe.

  • Method Details

    • get

      public SharePartition get(org.apache.kafka.server.share.SharePartitionKey partitionKey)
      Returns the share partition for the given key.
      Parameters:
      partitionKey - The key to get the share partition for.
      Returns:
      The share partition for the key or null if not found.

    • topicIdPartitionsForGroup

      public Set<org.apache.kafka.common.TopicIdPartition> topicIdPartitionsForGroup(String groupId)
      Returns the set of topic-partitions for the given group id.
      Parameters:
      groupId - The group id to get the topic-partitions for.
      Returns:
      The set of topic-partitions for the group id.

    • remove

      public SharePartition remove(org.apache.kafka.server.share.SharePartitionKey partitionKey)
      Removes the share partition from the cache. The method also removes the topic-partition from the group map.
      Parameters:
      partitionKey - The key to remove.
      Returns:
      The removed value or null if not found.

    • computeIfAbsent

      public SharePartition computeIfAbsent(org.apache.kafka.server.share.SharePartitionKey partitionKey, Function<org.apache.kafka.server.share.SharePartitionKey,SharePartition> mappingFunction)
      Computes the value for the given key if it is not already present in the cache. Method also updates the group map with the topic-partition for the group id.
      Parameters:
      partitionKey - The key to compute the value for.
      mappingFunction - The function to compute the value.
      Returns:
      The computed or existing value.

    • cachedSharePartitionKeys

      public Set<org.apache.kafka.server.share.SharePartitionKey> cachedSharePartitionKeys()
      Returns the set of all share partition keys in the cache. As the cache can't be cleaned without marking the share partitions fenced and detaching the partition listener in the replica manager, hence rather providing a method to clean the cache directly, this method is provided to fetch all the keys in the cache.
      Returns:
      The set of all share partition keys.