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

类 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.

嵌套类概要

嵌套类

修饰符和类型	类	说明
static interface	DataBlockUtils.VersionCheck	Version checking marker interface.

字段概要

字段

修饰符和类型	字段	说明
static final String	METADATA_FORMAT_VERSION_KEY
static final DataBlockUtils.VersionCheck	VERSION_CHECK

构造器概要

构造器

构造器	说明
DataBlockUtils()

方法概要

修饰符和类型	方法	说明
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)

从类继承的方法 java.lang.Object

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

字段详细资料

METADATA_FORMAT_VERSION_KEY

public static final String METADATA_FORMAT_VERSION_KEY

另请参阅:

• 常量字段值

VERSION_CHECK

public static final DataBlockUtils.VersionCheck VERSION_CHECK

构造器详细资料

DataBlockUtils

public DataBlockUtils()

方法详细资料

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)