Package org.apache.ignite.internal.util

System-wide utility routine and helper classes.

Interface Summary

Interface	Description
ClassCache	Class cache.
DirectBufferCleaner	Cleaner interface for java.nio.ByteBuffer.
GridIntIterator	Iterator over integer primitives.
GridSerializableIterable<E>	Makes Iterable as Serializable and is useful for making anonymous serializable iterators.
GridSerializableIterator<E>	Makes Iterator as Serializable and is useful for making anonymous serializable iterators.
IgniteTree<L,T>	Interface for ignite internal tree.
IgniteTree.InvokeClosure<T>
IgniteUtils.InterfaceSupplier	Explicit class for Supplier<Enumeration<NetworkInterface>>.

Class Summary

Class	Description
BasicRateLimiter	The simplified version of Google Guava smooth rate limiter. The primary feature of a rate limiter is its "stable rate", the maximum rate that is should allow at normal conditions.
F0	Internal utility class that contains not peer-deployable predicates for use in internal logic.
FeatureChecker	Class extracted for fields from GridUnsafe to be absolutely independent with current and future static block initialization effects.
GridAnnotationsCache	Caches class loaders for classes.
GridArgumentCheck	This class encapsulates argument check (null and range) for public facing APIs.
GridArrays	Utility methods to work with arrays.
GridAtomicInitializer<T>	Executes initialization operation once.
GridAtomicInteger	Extended version of AtomicInteger.
GridAtomicLong	Extended version of AtomicLong.
GridBoundedConcurrentLinkedHashMap<K,V>	Concurrent map with an upper bound.
GridBoundedConcurrentLinkedHashSet<E>	Concurrent set with an upper bound.
GridBoundedConcurrentOrderedMap<K,V>	Concurrent ordered map that automatically manages its maximum size.
GridBoundedConcurrentOrderedSet<E>	Concurrent ordered set that automatically manages its maximum size.
GridBoundedLinkedHashMap<K,V>	Generic map with an upper bound.
GridBoundedLinkedHashSet<E>	Hash table and linked list implementation of the Set interface, with predictable iteration order.
GridBoundedPriorityQueue<E>	Bounded variant of PriorityQueue.
GridBusyLock	Synchronization aid to track "busy" state of a subsystem that owns it.
GridByteArrayList	Re-sizable array implementation of the byte list (eliminating auto-boxing of primitive byte type).
GridCircularBuffer<T>	This class implements a circular buffer for efficient data exchange.
GridClassLoaderCache	Caches class loaders for classes.
GridClientByteUtils	Primitive to byte array and backward conversions.
GridCloseableIteratorAdapter<T>	Convenient adapter for closeable iterator.
GridCloseableIteratorAdapterEx<T>	Adapter for closeable iterator that can be safely closed concurrently.
GridCollections	Provides locked wrappers around given maps and collections.
GridConcurrentFactory	Concurrent map factory.
GridConcurrentHashSet<E>	Concurrent set implementation.
GridConcurrentLinkedHashSet<E>	Concurrent linked set implementation.
GridConcurrentMultiPairQueue<K,V>	Concurrent queue that wraps collection of Pair<K, V[]> The only garantee GridConcurrentMultiPairQueue.next(org.apache.ignite.internal.util.GridConcurrentMultiPairQueue.Result<K, V>) provided is sequentially emptify values per key array.
GridConcurrentMultiPairQueue.Result<K,V>	State holder.
GridConcurrentPhantomHashSet<E>	Concurrent phantom hash set implementation.
GridConcurrentSkipListSet<E>	This class provided the same logic as ConcurrentSkipListSet.
GridConcurrentWeakHashSet<E>	Concurrent weak hash set implementation.
GridConfigurationFinder	Finds configuration files located in IGNITE_HOME folder and its subfolders.
GridConsistentHash<N>	Controls key to node affinity using consistent hash algorithm.
GridCountDownCallback	Allows to execute callback when a set of operations will be completed.
GridCursorIteratorWrapper<V>	Wrap Iterator and adapt it to GridCursor.
GridDebug	Utility class for debugging.
GridDebug.Item	Debug info queue item.
GridEmptyCloseableIterator<T>	Empty closeable iterator.
GridEmptyIterator<T>	Empty iterator.
GridFixedSizeInputStream	Input stream wrapper which allows to read exactly expected number of bytes.
GridHandleTable	Lightweight identity hash table which maps objects to integer handles, assigned in ascending order.
GridIntList	Minimal list API to work with primitive ints.
GridJavaProcess	Wrapper class around the Process suited to run any Java class as separate java process.
GridKeyLock	This is an utility class for 'splitting' locking of some resources.
GridLeanIdentitySet<T>
GridLeanMap<K,V>	Lean map implementation that keeps up to five entries in its fields.
GridLeanSet<E>	Lean set implementation.
GridListSet<V>	Implementation of Set based on internal list rather than hash table.
GridLogThrottle	Grid log throttle.
GridLongList	Minimal list API to work with primitive longs.
GridMessageCollection<M extends Message>	Collection of messages.
GridMultiCollectionWrapper<E>	Wrapper around several collection, don't allow adding new elements.
GridMutableLong	A mutable long for use in collections.
GridMutex	Serializable mutex.
GridPartitionStateMap	Grid partition state map.
GridQueue<E>	Queue which supports addition at tail and removing at head.
GridQueue.Node<E>	Node for internal linked list.
GridRandom	Random to be used from a single thread.
GridReflectionCache	Reflection field and method cache for classes.
GridSerializableCollection<E>	Makes AbstractCollection as Serializable and is useful for making anonymous serializable collections.
GridSerializableList<E>	Makes AbstractList as Serializable and is useful for making anonymous serializable lists.
GridSerializableMap<K,V>	Makes AbstractMap as Serializable and is useful for making anonymous serializable maps.
GridSerializableSet<E>	Makes AbstractSet as Serializable and is useful for making anonymous serializable sets.
GridSetWrapper<E>	Set implementation that delegates to map.
GridSnapshotLock<X>	Synchronization primitive allowing concurrent updates and taking consistent snapshots.
GridSpiCloseableIteratorWrapper<T>	Wrapper used to covert IgniteSpiCloseableIterator to GridCloseableIterator.
GridSpinBusyLock	Synchronization aid to track "busy" state of a subsystem that owns it.
GridSpinReadWriteLock
GridStringBuilder	Optimized string builder with better API.
GridStringBuilderFactory	Per-thread cache of StringBuilder instances.
GridStripedLock	This is an utility class for 'splitting' locking of some int- or long-keyed resources.
GridStripedReadWriteLock	This is an utility class for 'splitting' locking of some int- or long-keyed resources.
GridStripedSpinBusyLock	Striped spin busy lock.
GridSynchronizedMap<K,V>	Synchronized map for cache values that is safe to update in-place.
GridTimer	Timer to use mostly for debugging purposes.
GridTimerTask	Utility extension for TimerTask.
GridUnsafe	Wrapper for Unsafe class.
GridWeakIterator<T>	Weak iterator.
HostAndPortRange	Represents address along with port range.
IgniteCollectors	Custom collectors for Stream API.
IgniteExceptionRegistry	Utility to collect suppressed errors within internal code.
IgniteExceptionRegistry.ExceptionInfo	Detailed info about suppressed error.
IgniteStopwatch	An object that measures elapsed time in nanoseconds.
IgniteTicker	A time source; returns a time value representing the number of nanoseconds elapsed since some fixed but arbitrary point in time.
IgniteUtils	Collection of utility methods used throughout the system.
IgniteUuidCache
InitializationProtector	Class for avoid multiple initialization of specific value from various threads.
MutableSingletonList<E>	List that can contain maximum of one element.
OffheapReadWriteLock	Lock state structure is as follows:
ReentrantReadWriteLockWithTracking	ReentrantReadWriteLock adapter with readLock tracking.
ReentrantReadWriteLockWithTracking.ReadLockWithTracking	Tracks long rlock holders.
ReflectiveDirectBufferCleaner	DirectBufferCleaner implementation based on sun.misc.Cleaner and sun.nio.ch.DirectBuffer.cleaner() method.
StripedCompositeReadWriteLock	ReadWriteLock with striping mechanics.
StripedExecutor	Striped executor.
StripedExecutor.Stripe	Stripe.
TimeBag	Utility class to measure and collect timings of some execution workflow.
UnsafeDirectBufferCleaner	DirectBufferCleaner implementation based on Unsafe.invokeCleaner method.
UUIDCollectionMessage	Collection of UUIDs.

Enum Summary

Enum	Description
IgniteTree.OperationType

Annotation Types Summary

Annotation Type	Description
SerializableTransient	Marks class as it has transient fields that should be serialized.
TransientSerializable	Marks class as it has non-transient fields that should not be serialized.