Package org.bitcoinj.utils

Class BlockFileLoader

java.lang.Object

org.bitcoinj.utils.BlockFileLoader

All Implemented Interfaces:

java.lang.Iterable<Block>

public class BlockFileLoader
extends java.lang.Object
implements java.lang.Iterable<Block>

This class reads block files stored in the Bitcoin Core format. This is simply a way to concatenate blocks together. Importing block data with this tool can be a lot faster than syncing over the network, if you have the files available.

In order to comply with Iterable, BlockFileLoader.BlockFileIterator swallows a lot of IOExceptions, which may result in a few blocks being missed followed by a huge set of orphan blocks.

To blindly import all files which can be found in Bitcoin Core (version 0.8 or higher) datadir automatically, try this code fragment: BlockFileLoader loader = new BlockFileLoader(BlockFileLoader.getReferenceClientBlockFileList()); for (Block block : loader) { try { chain.add(block); } catch (Exception e) { } }

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	BlockFileLoader.BlockFileIterator	Iterates all the blocks in a single block file.

Constructor Summary

Constructors

Constructor	Description
BlockFileLoader(Network network, java.io.File blocksDir)
BlockFileLoader(Network network, java.util.List<java.io.File> files)
BlockFileLoader(NetworkParameters params, java.io.File blocksDir)	Deprecated.
BlockFileLoader(NetworkParameters params, java.util.List<java.io.File> files)	Deprecated.

Method Summary

Modifier and Type	Method	Description
static java.io.File	defaultBlocksDir()
protected java.util.Spliterator<java.nio.ByteBuffer>	fileBlockSpliterator(java.io.File file)
protected java.util.stream.Stream<java.nio.ByteBuffer>	fileBlockStream(java.io.File file)
static java.util.List<java.io.File>	getReferenceClientBlockFileList()
static java.util.List<java.io.File>	getReferenceClientBlockFileList(java.io.File blocksDir)	Gets the list of files which contain blocks from Bitcoin Core.
java.util.Iterator<Block>	iterator()
java.util.stream.Stream<Block>	stream()
java.util.stream.Stream<java.nio.ByteBuffer>	streamBuffers()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

BlockFileLoader

public BlockFileLoader(Network network,
                       java.io.File blocksDir)

BlockFileLoader

public BlockFileLoader(Network network,
                       java.util.List<java.io.File> files)

BlockFileLoader

@Deprecated
public BlockFileLoader(NetworkParameters params,
                       java.io.File blocksDir)

Deprecated.

BlockFileLoader

@Deprecated
public BlockFileLoader(NetworkParameters params,
                       java.util.List<java.io.File> files)

Deprecated.

Method Detail

getReferenceClientBlockFileList

public static java.util.List<java.io.File> getReferenceClientBlockFileList(java.io.File blocksDir)

Gets the list of files which contain blocks from Bitcoin Core.

getReferenceClientBlockFileList

public static java.util.List<java.io.File> getReferenceClientBlockFileList()

defaultBlocksDir

public static java.io.File defaultBlocksDir()

iterator

public java.util.Iterator<Block> iterator()

Specified by:

iterator in interface java.lang.Iterable<Block>

stream

public java.util.stream.Stream<Block> stream()

streamBuffers

public java.util.stream.Stream<java.nio.ByteBuffer> streamBuffers()

fileBlockStream

protected java.util.stream.Stream<java.nio.ByteBuffer> fileBlockStream(java.io.File file)

fileBlockSpliterator

protected java.util.Spliterator<java.nio.ByteBuffer> fileBlockSpliterator(java.io.File file)