Examples with ExplicitMoveDirector org.apache.geode.internal.cache.partitioned.rebalance.ExplicitMoveDirector used on opensource projects

Example 1 with ExplicitMoveDirector

use of org.apache.geode.internal.cache.partitioned.rebalance.ExplicitMoveDirector in project geode by apache.

the class PartitionRegionHelper method moveBucketByKey.

/**
   * Moves the bucket which contains the given key from the source member to the destination member.
   * The bucket will be fully transferred once this method is complete, if the method does not throw
   * an exception.
   * <p>
   * All keys which exist in the same bucket will also be moved to the new node.
   * <p>
   * Any data in colocated regions that are colocated with this key will also be moved.
   * <p>
   * This method allows direct control of what data to move. To automatically balance buckets, see
   * {@link ResourceManager#createRebalanceFactory()}
   * 
   * @param region The region in which to move the bucket. Data in regions colocated with this
   *        region will also be moved.
   * @param source A member that is currently hosting this bucket. The bucket is moved off of this
   *        member.
   * @param destination A member that is not currently hosting this bucket, but has the partitioned
   *        region defined. The bucket is moved to this member.
   * @param key A key which maps to the bucket to move. This key does not actually need to exist in
   *        the region, but if using a {@link PartitionResolver} the resolver should be able to get
   *        the routing object from this key to determine the bucket to move.
   * 
   * @throws IllegalStateException if the bucket is not present on the source, if the source or
   *         destination are not valid members of the system, if the destination already hosts a
   *         copy of the bucket, or if the bucket does not exist.
   * 
   * @since GemFire 7.1
   */
public static <K> void moveBucketByKey(Region<K, ?> region, DistributedMember source, DistributedMember destination, K key) {
    PartitionedRegion pr = isPartitionedCheck(region);
    if (pr.isFixedPartitionedRegion()) {
        throw new IllegalStateException("Cannot move data in a fixed partitioned region");
    }
    int bucketId = pr.getKeyInfo(key).getBucketId();
    ExplicitMoveDirector director = new ExplicitMoveDirector(key, bucketId, source, destination, region.getCache().getDistributedSystem());
    PartitionedRegionRebalanceOp rebalance = new PartitionedRegionRebalanceOp(pr, false, director, true, true);
    rebalance.execute();
}