org.apache.bookkeeper.mledger.offload.jcloud

Interface OffloadIndexBlock

All Superinterfaces:

AutoCloseable, Closeable

All Known Implementing Classes:

OffloadIndexBlockImpl

@InterfaceStability.Unstable
public interface OffloadIndexBlock
extends Closeable

The Index block abstraction used for offload a ledger to long term storage.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	OffloadIndexBlock.IndexInputStream An input stream which knows the size of the stream upfront.

Method Summary

Modifier and Type	Method and Description
long	getDataBlockHeaderLength() Get the length of the header in the blocks in the data object.
long	getDataObjectLength() Get the total size of the data object.
int	getEntryCount() Get the entry count that contained in this index Block.
OffloadIndexEntry	getIndexEntryForEntry(long messageEntryId) Get the related OffloadIndexEntry that contains the given messageEntryId.
org.apache.bookkeeper.client.api.LedgerMetadata	getLedgerMetadata() Get LedgerMetadata.
OffloadIndexBlock.IndexInputStream	toStream() Get the content of the index block as InputStream.

Methods inherited from interface java.io.Closeable

close

Method Detail

toStream

OffloadIndexBlock.IndexInputStream toStream()
                                     throws IOException

Get the content of the index block as InputStream. Read out in format: | index_magic_header | index_block_len | index_entry_count | | data_object_size | segment_metadata_length | segment metadata | index entries ... |

Throws:

IOException

getIndexEntryForEntry

OffloadIndexEntry getIndexEntryForEntry(long messageEntryId)
                                 throws IOException

Get the related OffloadIndexEntry that contains the given messageEntryId.

Parameters:

messageEntryId - the entry id of message

Returns:

the offload index entry

Throws:

IOException

getEntryCount

int getEntryCount()

Get the entry count that contained in this index Block.

getLedgerMetadata

org.apache.bookkeeper.client.api.LedgerMetadata getLedgerMetadata()

Get LedgerMetadata.

getDataObjectLength

long getDataObjectLength()

Get the total size of the data object.

getDataBlockHeaderLength

long getDataBlockHeaderLength()

Get the length of the header in the blocks in the data object.