Package mondrian.rolap.agg

Class SegmentCacheWorker

java.lang.Object
mondrian.rolap.agg.SegmentCacheWorker
public final class SegmentCacheWorker extends Object
Utility class to interact with the SegmentCache.
Author:
LBoudreau
See Also:

  • Constructor Details

    • SegmentCacheWorker

      public SegmentCacheWorker(SegmentCache cache, Thread cacheMgrThread)
      Creates a worker.
      Parameters:
      cache - Cache managed by this worker
      cacheMgrThread - Thread that the cache manager actor is running on, and which therefore should not be used for potentially long-running calls this this cache. Pass null if methods can be called from any thread.

  • Method Details

    • initCache

      public static List<SegmentCache> initCache()
      Instantiates a cache. Returns null if there is no external cache defined.
      Returns:
      Cache

    • get

      public SegmentBody get(SegmentHeader header)
      Returns a segment body corresponding to a header.

      If no cache is configured or there is an error while querying the cache, null is returned none the less.

      Parameters:
      header - Header to search.
      Returns:
      Either a segment body object or null if there was no cache configured or no segment could be found for the passed header.

    • put

      public void put(SegmentHeader header, SegmentBody body)
      Places a segment in the cache. Returns true or false if the operation succeeds.
      Parameters:
      header - A header to search for in the segment cache.
      body - The segment body to cache.

    • remove

      public boolean remove(SegmentHeader header)
      Removes a segment from the cache.
      Parameters:
      header - A header to remove in the segment cache.
      Returns:
      Whether a segment was removed

    • getSegmentHeaders

      public List<SegmentHeader> getSegmentHeaders()
      Returns a list of segments present in the cache.
      Returns:
      List of headers in the cache

    • supportsRichIndex

      public boolean supportsRichIndex()

    • shutdown

      public void shutdown()