Package org.mapdb

Interface Summary

Interface	Description
Bind.MapListener<K,V>	Listener called when Map is modified.
Bind.MapWithModificationListener<K,V>	Primary Maps must provide notifications when it is modified.
BTreeKeySerializer.StringArrayKeys
DataIO.DataInputInternal	Give access to internal byte[] or ByteBuffer in DataInput2..
Engine	Centerpiece for record management, Engine is simple key value store.
Fun.Function0<R>	function which takes no argument and returns one value
Fun.Function1<R,A>	function which takes one argument and returns one value
Fun.Function1Int<R>	function which takes one int argument and returns one value
Fun.Function2<R,A,B>	function which takes two argument and returns one value
Fun.RecordCondition<A>	decides if some action should be executed on an record
TxBlock	Wraps single transaction in a block

Class Summary

Class	Description
Atomic	A small toolkit of classes that support lock-free thread-safe programming on single records.
Atomic.Boolean	A boolean record that may be updated atomically.
Atomic.Integer	An int record that may be updated atomically.
Atomic.Long	A long record that may be updated atomically.
Atomic.String	A String record that may be updated atomically.
Atomic.Var<E>	Atomically updated variable which may contain any type of record.
Bind	Binding is simple yet powerful way to keep secondary collection synchronized with primary collection.
BTreeKeySerializer<KEY,KEYS>	Custom serializer for BTreeMap keys which enables [Delta encoding](https://en.wikipedia.org/wiki/Delta_encoding).
BTreeKeySerializer.ArrayKeySerializer
BTreeKeySerializer.BasicKeySerializer	Basic Key Serializer which just writes data without applying any compression.
BTreeKeySerializer.ByteArrayKeys
BTreeKeySerializer.CharArrayKeys
BTreeKeySerializer.Compress
BTreeMap<K,V>	A scalable concurrent ConcurrentNavigableMap implementation.
BTreeMap.BNode	common interface for BTree node
BTreeMap.DirNode
BTreeMap.KeySet<E>
BTreeMap.LeafNode
CompressLZF	This class implements the LZF lossless data compression algorithm.
DataIO	Various IO classes and utilities..
DataIO.DataInputByteArray	DataInput on top of byte[]
DataIO.DataInputByteBuffer	Wraps ByteBuffer and provides DataInput
DataIO.DataInputToStream	Wraps DataInput into InputStream
DataIO.DataOutputByteArray	Provides DataOutput implementation on top of growable byte[] ByteArrayOutputStream is not used as it requires byte[] copying
DataIO.HeartbeatFileLock	File locking mechanism.
DB	A database with easy access to named maps and other collections.
DB.BTreeMapMaker
DB.HTreeMapMaker
DBMaker	A builder class to creare and open new database and individual collections.
DBMaker.Maker
EncryptionXTEA	An implementation of the EncryptionXTEA block cipher algorithm.
Engine.CloseOnJVMShutdown	Closes Engine on JVM shutdown using shutdown hook: Runtime.addShutdownHook(Thread) If engine was closed by user before JVM shutdown, hook is removed to save memory.
Engine.ReadOnly
Engine.ReadOnlyWrapper	Wraps an Engine and throws UnsupportedOperationException("Read-only") on any modification attempt.
Fun	Functional stuff.
Fun.ArrayComparator	compares two arrays using given comparators
Fun.Pair<A,B>
HTreeMap<K,V>	Thread safe concurrent HashMap
Pump	Data Pump moves data from one source to other.
Queues	Various queue algorithms
Queues.CircularQueue<E>
Queues.Queue<E>	First in first out lock-free queue
Queues.SimpleQueue<E>
Queues.Stack<E>	Last in first out lock-free queue
Serializer<A>	Provides serialization and deserialization
Serializer.Array<T>
Serializer.CompressionDeflateWrapper<E>	wraps another serializer and (de)compresses its output/input using Deflate
Serializer.CompressionWrapper<E>	wraps another serializer and (de)compresses its output/input
SerializerBase	Serializer which uses 'header byte' to serialize/deserialize most of classes from 'java.lang' and 'java.util' packages.
SerializerPojo	Serializer which handles POJO, object graphs etc.
Store
Store.Cache	Cache implementation, part of Store class.
Store.Cache.HardRef	Cache created objects using hard reference.
Store.Cache.HashTable	Fixed size cache which uses hash table.
Store.Cache.LRU
Store.Cache.WeakSoftRef	Instance cache which uses SoftReference or WeakReference Items can be removed from cache by Garbage Collector if
Store.LongLongMap	Open Hash Map which uses primitive long as values and keys.
Store.LongObjectMap<V>	Open Hash Map which uses primitive long as keys.
Store.LongObjectObjectMap<V1,V2>	Open Hash Map which uses primitive long as keys.
Store.LongQueue	Queue of primitive long.
Store.MemoryBarrierLessLock	Lock which blocks parallel execution, but does not use MemoryBarrier (and does not flush CPU cache)
Store.ReadWriteSingleLock	fake read/write lock which in fact locks on single write lock
StoreAppend	append only store
StoreArchive	Store without index table.
StoreCached	Extends StoreDirect with Write Cache
StoreDirect
StoreDirect.Snapshot
StoreHeap	Store which keeps all instances on heap.
StoreHeap.Snapshot
StoreWAL	Write-Ahead-Log
TxEngine	Naive implementation of Snapshots on top of StorageEngine.
TxMaker	Transaction factory
Volume	MapDB abstraction over raw storage (file, disk partition, memory etc...).
Volume.ByteArrayVol
Volume.ByteBufferVol	Abstract Volume over bunch of ByteBuffers It leaves ByteBufferVol details (allocation, disposal) on subclasses.
Volume.ByteBufferVolSingle	Abstract Volume over single ByteBuffer, maximal size is 2GB (32bit limit).
Volume.FileChannelVol	Volume which uses FileChannel.
Volume.MappedFileVol
Volume.MappedFileVolSingle
Volume.MemoryVol
Volume.MemoryVolSingle
Volume.RandomAccessFileVol
Volume.ReadOnly
Volume.SingleByteArrayVol	Volume backed by on-heap byte[] with maximal fixed size 2GB.
Volume.VolumeFactory

Exception Summary

Exception	Description
DBException	General exception returned by MapDB if something goes wrong.
DBException.ChecksumBroken
DBException.ClassNotFound
DBException.DataCorruption
DBException.EngineCompactUncommited
DBException.EngineGetVoid
DBException.FileDeleteFailed
DBException.FileLocked	Some other process (possibly DB) holds exclusive lock over this file, so it can not be opened
DBException.HeadChecksumBroken
DBException.Interrupted
DBException.OutOfMemory
DBException.PointerChecksumBroken
DBException.PumpSourceDuplicate
DBException.PumpSourceNotSorted
DBException.UnknownSerializer
DBException.VolumeClosed
DBException.VolumeClosedByInterrupt
DBException.VolumeEOF
DBException.VolumeIOError
DBException.VolumeMaxSizeExceeded
DBException.WrongConfig
TxRollbackException	Exception thrown when transaction is rolled back.