Package com.tangosol.net

Interface PartitionedService

    • Method Detail

      • getPartitionCount

        int getPartitionCount()
        Determine the number of partitions that the service has been configured to "break up" the conceptual "key set" into.

        The value of this property is in the range [1..n] where n is an arbitrarily large integer value that does not exceed Integer.MAX_VALUE.

        Returns:
        the number of separate partitions into which this service partitions the set of potential keys

      • getBackupCount

        int getBackupCount()
        Determine the configured redundancy count that this service has been configured to maintain. A redundancy count of zero implies that the service will not maintain backup copies of information for failover purposes, while a redundancy count greater than zero indicates that the service must attempt to synchronously maintain that number of backup copies of the data under the management of the service in order to provide seamless (and lossless) failover of data and processing.

        The value of this property is in the range [0..n] where n is an arbitrarily large integer value that does not exceed Integer.MAX_VALUE.

        Returns:
        the configured redundancy count for this service

      • getKeyAssociator

        KeyAssociator getKeyAssociator()
        Determine the key associator that this service has been configured to use. Information provided by this KeyAssociator will be used to place all associated keys into the same partition.
        Returns:
        the KeyAssociator for this service

      • getKeyPartitioningStrategy

        KeyPartitioningStrategy getKeyPartitioningStrategy()
        Determine the strategy for key partitioning that this service has been configured to use.
        Returns:
        the KeyPartitioningStrategy for this service

      • getPartitionAssignmentStrategy

        PartitionAssignmentStrategy getPartitionAssignmentStrategy()
        Determine the strategy for assigning partitions to cluster members that this service has been configured to use.
        Returns:
        the PartitionAssignmentStrategy for this service

      • getKeyOwner

        Member getKeyOwner​(Object oKey)
        Determine the primary owner of the specified key, as determined by the combination of the KeyPartitioningStrategy and the PartitionAssignmentStrategy. It's possible that during partition re-distribution (e.g. as a result of a failover) this method will return null, indicating that the partition ownership is currently undetermined.
        Parameters:
        oKey - a key in its Object form
        Returns:
        the cluster Member that is currently the owner for the specified key or null if the ownership is currently undetermined

      • getPartitionOwner

        Member getPartitionOwner​(int nPartition)
        Determine the primary owner of the specified partition. It is possible that during partition re-distribution (e.g. as a result of a failover) that this method will return null, indicating that the partition ownership is currently undetermined.
        Parameters:
        nPartition - a partition ID
        Returns:
        the cluster Member that is currently the owner for the specified partition or null if the distribution is currently undetermined
        Throws:
        IllegalArgumentException - if the partition number is negative or greater than the partition count for this partitioned service

      • getOwnershipVersion

        int getOwnershipVersion​(int nPartition)
        Determine the primary owner's version of the specified partition. It is possible that during partition re-distribution (e.g. as a result of a failover) that this method will return -1, indicating that the partition ownership is currently undetermined.
        Parameters:
        nPartition - a partition ID
        Returns:
        the partition ownership version or -1
        Throws:
        IllegalArgumentException - if the partition number is negative or greater than the partition count for this partitioned service
        Since:
        Coherence 12.2.1.1

      • getBackupOwner

        Member getBackupOwner​(int nPartition,
                      int nBackup)
        Determine the backup owner of the specified partition. It is possible that during partition re-distribution (e.g. as a result of a failover) that this method will return null, indicating that the partition ownership is currently undetermined.
        Parameters:
        nPartition - a partition ID
        nBackup - the backup number (one-based)
        Returns:
        the cluster Member that is currently the owner for the specified backup copy for the given partition, or null if the distribution is currently undetermined
        Throws:
        IllegalArgumentException - if the partition number is negative or greater than the partition count or if the backup number is non-positive or greater than the backup count for this partitioned service

      • getOwnedPartitions

        PartitionSet getOwnedPartitions​(Member member)
        Determine the PartitionSet that is currently owned by a cluster Member. If the specified member does not run this clustered service, null is returned.

        Note: the returned PartitionSet represents a "snapshot" of the ownership information at a time of the call and may change at any moment.

        Parameters:
        member - the cluster Member
        Returns:
        the PartitionSet that the cluster Member currently owns
        Since:
        Coherence 3.4

      • getOwnershipEnabledMembers

        Set<Member> getOwnershipEnabledMembers()
        Return a Set of Member objects, one for each Member that has registered this PartitionedService and is partition ownership-enabled.
        Returns:
        a set of Member objects that provide partition ownership for this partitioned service
        Since:
        Coherence 3.6

      • getOwnershipSenior

        Member getOwnershipSenior()
        Return the senior ownership-enabled member in the service.
        Returns:
        the senior ownership-enabled member in the service
        Since:
        Coherence 12.2.1

      • addPartitionListener

        void addPartitionListener​(PartitionListener listener)
        Add a PartitionListener to this service.
        Parameters:
        listener - the listener to add
        Since:
        Coherence 3.7

      • removePartitionListener

        void removePartitionListener​(PartitionListener listener)
        Remove a PartitionListener from this service.
        Parameters:
        listener - the listener to remove
        Since:
        Coherence 3.7

      • getBackupStrength

        int getBackupStrength()
        Return the current backup strength of the partitioned service.
        Returns:
        the current backup strength of the partitioned service

      • getBackupStrengthName

        String getBackupStrengthName()
        Return the string representing current backup strength.
        Returns:
        the string representing current backup strength

      • getPersistenceMode

        String getPersistenceMode()
        Return the persistence mode, or null if persistence is not configured.
        Returns:
        the persistence mode, or null if persistence is not configured