Package org.bitcoinj.store

Block stores persist blockchain data downloaded from remote peers.

See: Description

Interface Summary

Interface	Description
BlockStore	An implementor of BlockStore saves StoredBlock objects to disk.
FullPrunedBlockStore	An implementor of FullPrunedBlockStore saves StoredBlock objects to some storage mechanism.

Class Summary

Class	Description
DatabaseFullPrunedBlockStore	A generic full pruned block store for a relational database.
H2FullPrunedBlockStore	A full pruned block store using the H2 pure-java embedded database.
LevelDBBlockStore	An SPV block store that writes every header it sees to a LevelDB.
LevelDBFullPrunedBlockStore	An implementation of a Fully Pruned Block Store using a leveldb implementation as the backing data store.
MemoryBlockStore	Keeps StoredBlocks in memory.
MemoryFullPrunedBlockStore	Keeps StoredBlocks, StoredUndoableBlocks and UTXOs in memory.
MemoryFullPrunedBlockStore.StoredBlockAndWasUndoableFlag
MySQLFullPrunedBlockStore	A full pruned block store using the MySQL database engine.
PostgresFullPrunedBlockStore	A full pruned block store using the Postgres database engine.
SPVBlockStore	An SPVBlockStore holds a limited number of block headers in a memory mapped ring buffer.
WindowsMMapHack	This class knows how to force an mmap'd ByteBuffer to reliquish its file handles before it becomes garbage collected, by exploiting implementation details of the HotSpot JVM implementation.

Exception Summary

Exception	Description
BlockStoreException	Thrown when something goes wrong with storing a block.
ChainFileLockedException	Thrown by SPVBlockStore when the process cannot gain exclusive access to the chain file.

Package org.bitcoinj.store Description

Block stores persist blockchain data downloaded from remote peers. There is an SPV block store which preserves a ring buffer of headers on disk and is suitable for lightweight user wallets, a store that's backed by Postgres and which can calculate a full indexed UTXO set (i.e. it can query address balances), a store that's backed by the embedded H2 database, and a memory only store useful for unit tests.