org.apache.bookkeeper.mledger.offload.jcloud.impl

Class DataBlockUtils

java.lang.Object

org.apache.bookkeeper.mledger.offload.jcloud.impl.DataBlockUtils

public class DataBlockUtils
extends Object

Utility class for performing various Data Block functions including: - Calculating the data block offload key - Calculating the data block index key - Adding version metadata information to a Data Block - Validating the version metadata information of a Data Block.

Additional functions can be added in to future to tag Data Blocks with information such as the compression algorithm used to compress the contents, the md5 checksum of the content for validation, date published, etc.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	DataBlockUtils.VersionCheck Version checking marker interface.

Field Summary

Fields

Modifier and Type	Field and Description
static String	METADATA_FORMAT_VERSION_KEY
static DataBlockUtils.VersionCheck	VERSION_CHECK

Constructor Summary

Constructors

Constructor and Description
DataBlockUtils()

Method Summary

Modifier and Type	Method and Description
static void	addVersionInfo(org.jclouds.blobstore.domain.BlobBuilder blobBuilder, Map<String,String> userMetadata)
static String	dataBlockOffloadKey(long ledgerId, UUID uuid)
static String	indexBlockOffloadKey(long ledgerId, UUID uuid)
static String	indexBlockOffloadKey(UUID uuid)

Methods inherited from class java.lang.Object

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

Field Detail

METADATA_FORMAT_VERSION_KEY

public static final String METADATA_FORMAT_VERSION_KEY

See Also:

Constant Field Values

VERSION_CHECK

public static final DataBlockUtils.VersionCheck VERSION_CHECK

Constructor Detail

DataBlockUtils

public DataBlockUtils()

Method Detail

dataBlockOffloadKey

public static String dataBlockOffloadKey(long ledgerId,
                                         UUID uuid)

indexBlockOffloadKey

public static String indexBlockOffloadKey(long ledgerId,
                                          UUID uuid)

indexBlockOffloadKey

public static String indexBlockOffloadKey(UUID uuid)

addVersionInfo

public static void addVersionInfo(org.jclouds.blobstore.domain.BlobBuilder blobBuilder,
                                  Map<String,String> userMetadata)