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

Class DataBlockUtils

java.lang.Object

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

public class DataBlockUtils
extends java.lang.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	Description
static interface	DataBlockUtils.VersionCheck	Version checking marker interface.

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor	Description
DataBlockUtils()

Method Summary

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

indexBlockOffloadKey

public static java.lang.String indexBlockOffloadKey(long ledgerId,
                                                    java.util.UUID uuid)

indexBlockOffloadKey

public static java.lang.String indexBlockOffloadKey(java.util.UUID uuid)

addVersionInfo

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