Uses of Interface
com.bigdata.journal.ITask

Packages that use ITask

Package	Description
com.bigdata.journal	The journal is an append-only persistence capable data structure supporting atomic commit, named indices, and transactions.
com.bigdata.rdf.task	Abstraction layer for task-based concurrency at the triple store layer.
com.bigdata.resources	This package provides the logic to managed the live journal and the historical journals and index segments for a DataService.
com.bigdata.service	This package provides implementations of bigdata services (metadata service, data service, transaction manager service.

Uses of ITask in com.bigdata.journal

Classes in com.bigdata.journal that implement ITask

Modifier and Type	Class and Description
class	AbstractTask<T> Abstract base class for tasks that may be submitted to the ConcurrencyManager.
protected static class	AbstractTask.DelegateTask<T> Delegates various behaviors visible to the application code using the ITask interface to the AbstractTask object.
protected static class	AbstractTask.InnerReadWriteTxServiceCallable<T> Inner class used to wrap up the call to AbstractTask.doTask() for read-write transactions.
protected static class	AbstractTask.InnerWriteServiceCallable<T> An instance of this class is used as the delegate to coordinate the acquisition of locks with the NonBlockingLockManager before the task can execute and to release locks after the task has completed (whether it succeeds or fails).
class	DropIndexTask Drop a named index (unisolated write operation).
class	IndexProcedureTask<T> Class provides an adaptor allowing a IIndexProcedure to be executed on an IConcurrencyManager.
static class	JournalTransactionService.SinglePhaseCommit This task is an UNISOLATED operation that validates and commits a transaction known to have non-empty write sets.
static class	JournalTransactionService.ValidateWriteSetTask This task is an UNISOLATED operation that validates a transaction known to have non-empty write sets.
class	RegisterIndexTask Register a named index (unisolated write operation).
static class	StressTestConcurrentUnisolatedIndices.WriteTask A task that writes on named unisolated index(s).

Uses of ITask in com.bigdata.rdf.task

Classes in com.bigdata.rdf.task that implement ITask

Modifier and Type	Class and Description
class	ApiTaskForJournal<T> Wrapper for a task to be executed on the IConcurrencyManager of a Journal.

Uses of ITask in com.bigdata.resources

Classes in com.bigdata.resources that implement ITask

Modifier and Type	Class and Description
class	AbstractAtomicUpdateTask<T> Abstract base class for tasks responsible for the atomic update of the view of an index partition.
class	AbstractPrepareTask<T> Base class for the prepare phase which reads on the old journal.
class	AbstractResourceManagerTask<T> Abstract base class for tasks run during post-processing of a journal by the ResourceManager.
class	CompactingMergeTask Task builds an IndexSegment from the fused view of an index partition as of some historical timestamp and then atomically updates the view (aka a compacting merge).
protected static class	CompactingMergeTask.AtomicUpdateCompactingMergeTask The source view is pre-overflow (the last writes are on the old journal) while the current view is post-overflow (reflects writes made since overflow).
class	IncrementalBuildTask Task builds an IndexSegment from the mutable BTree and zero or more additional sources in the index partition view and then atomically updates the view (aka an incremental build).
protected static class	IncrementalBuildTask.AtomicUpdateIncrementalBuildTask The source is an IndexSegment that was built from the mutable BTree associated with the lastCommitTime on old journal of some index partition.
class	JoinIndexPartitionTask Task joins one or more index partitions and should be invoked when their is strong evidence that the index partitions have shrunk enough to warrant their being combined into a single index partition.
protected static class	JoinIndexPartitionTask.AtomicUpdateJoinIndexPartition Task performs an atomic update of the index partition view definitions on the live journal and the MetadataIndex, thereby putting into effect the changes made by a JoinIndexPartitionTask.
class	MoveTask Task moves an index partition to another IDataService.
protected static class	MoveTask.AtomicUpdate Moves an index partition from this data service to another data service.
class	ScatterSplitTask Task splits an index partition into N equal sized index partitions and scatters those index partitions across data services in the federation.
class	SplitIndexPartitionTask Task splits an index partition which is a compact view (no more than one journal and one index segment) and should be invoked when the size of the index segment on the disk exceeds the nominal size of an index partition.
protected static class	SplitIndexPartitionTask.AtomicUpdateSplitIndexPartitionTask An ITx.UNISOLATED operation that splits the live index using the same Split points, generating new index partitions with new partition identifiers.
class	SplitTailTask Splits the tail of an index partition and optionally submits a task to move the tail to a target data service specified by the caller.
protected static class	SplitUtility.BuildIndexSegmentSplitTask Task used to build an IndexSegment from a restricted key-range of an index during a SplitIndexPartitionTask.

Uses of ITask in com.bigdata.service

Classes in com.bigdata.service that implement ITask

Modifier and Type	Class and Description
static class	DataService.GetIndexMetadataTask Retrieves the IndexMetadata for the named index as of the specified timestamp.
protected static class	DataService.RangeIteratorTask Task for running a rangeIterator operation.
static class	MetadataService.DropScaleOutIndexTask Drops a scale-out index.
protected static class	MetadataService.JoinIndexPartitionTask Updates the MetadataIndex to reflect the join of 2 or more index partitions.
protected static class	MetadataService.MoveIndexPartitionTask Updates the MetadataIndex to reflect the move of an index partition.
protected static class	MetadataService.NextPartitionIdTask Task assigns the next partition identifier for a registered scale-out index in a restart-safe manner.
protected static class	MetadataService.RegisterScaleOutIndexTask Registers a metadata index for a named scale-out index and statically partition the index using the given separator keys and data services.
protected static class	MetadataService.SplitIndexPartitionTask Atomic operation removes the pre-existing entry for specified index partition and replaces it with N new entries giving the locators for the N new index partitions created when that index partition was split.