eventcenter.leveldb

类 LevelDBPersistenceAdapter

java.lang.Object

eventcenter.leveldb.LevelDBPersistenceAdapter

所有已实现的接口:

Closeable, AutoCloseable

public class LevelDBPersistenceAdapter
extends Object
implements Closeable

使用LevelDB数据库封装持久化适配器

作者:

JackyLIU

字段概要

字段

限定符和类型	字段和说明
protected org.iq80.leveldb.DB	db
protected IdWorker	idWorker
protected org.apache.log4j.Logger	logger

构造器概要

构造器

构造器和说明
LevelDBPersistenceAdapter()

方法概要

限定符和类型	方法和说明
protected int	_clear()
void	clear()
void	close()
protected org.iq80.leveldb.Options	createOptions()
protected void	deleteById(String txnId)
void	deleteById(String[] ids)
<T> T	get(String key, Class<T> type)
Integer	getBatchDeleteSize()
Integer	getBlockRestartInterval()
Integer	getBlockSize()
Long	getCacheSize()
org.iq80.leveldb.DB	getDb()
File	getDirPath()
org.iq80.leveldb.DBIterator	getIterator()
Integer	getMaxOpenFiles()
<T> List<T>	getMore(Class<T> type, String... keys)
String	getName()
Boolean	getOpenLogger()
Boolean	getParanoidChecks()
Boolean	getUseSnappyCompression()
Boolean	getVerifyChecksums()
Integer	getWriteBufferSize()
void	houseKeeping()
List<EventSourceWrapper>	list(int batchSize)
List<EventSourceWrapper>	list(int batchSize, org.iq80.leveldb.DBIterator iterator)
String	nextId() create id
void	open()
void	put(String key, Serializable ser)
void	put(String key, Serializable ser, org.iq80.leveldb.WriteBatch update)
String	save(CommonEventSource evt) 存储的key使用的是txnId，value为txn的字节流
void	setBatchDeleteSize(Integer batchDeleteSize)
void	setBlockRestartInterval(Integer blockRestartInterval)
void	setBlockSize(Integer blockSize)
void	setCacheSize(Long cacheSize)
void	setDirPath(File dirPath)
void	setMaxOpenFiles(Integer maxOpenFiles)
void	setName(String name)
void	setOpenLogger(Boolean openLogger)
void	setParanoidChecks(Boolean paranoidChecks)
void	setUseSnappyCompression(Boolean useSnappyCompression)
void	setVerifyChecksums(Boolean verifyChecksums)
void	setWriteBufferSize(Integer writeBufferSize)

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

db

protected org.iq80.leveldb.DB db

idWorker

protected final IdWorker idWorker

logger

protected final org.apache.log4j.Logger logger

构造器详细资料

LevelDBPersistenceAdapter

public LevelDBPersistenceAdapter()

方法详细资料

getDirPath

public File getDirPath()

setDirPath

public void setDirPath(File dirPath)

getBlockRestartInterval

public Integer getBlockRestartInterval()

setBlockRestartInterval

public void setBlockRestartInterval(Integer blockRestartInterval)

getBlockSize

public Integer getBlockSize()

setBlockSize

public void setBlockSize(Integer blockSize)

getCacheSize

public Long getCacheSize()

setCacheSize

public void setCacheSize(Long cacheSize)

getUseSnappyCompression

public Boolean getUseSnappyCompression()

setUseSnappyCompression

public void setUseSnappyCompression(Boolean useSnappyCompression)

getMaxOpenFiles

public Integer getMaxOpenFiles()

setMaxOpenFiles

public void setMaxOpenFiles(Integer maxOpenFiles)

getParanoidChecks

public Boolean getParanoidChecks()

setParanoidChecks

public void setParanoidChecks(Boolean paranoidChecks)

getVerifyChecksums

public Boolean getVerifyChecksums()

setVerifyChecksums

public void setVerifyChecksums(Boolean verifyChecksums)

getWriteBufferSize

public Integer getWriteBufferSize()

setWriteBufferSize

public void setWriteBufferSize(Integer writeBufferSize)

getBatchDeleteSize

public Integer getBatchDeleteSize()

setBatchDeleteSize

public void setBatchDeleteSize(Integer batchDeleteSize)

createOptions

protected org.iq80.leveldb.Options createOptions()

open

public void open()
          throws IOException

抛出:

IOException

close

public void close()
           throws IOException

指定者:

close 在接口中 Closeable

指定者:

close 在接口中 AutoCloseable

抛出:

IOException

setName

public void setName(String name)

getName

public String getName()

nextId

public String nextId()

create id

返回:

save

public String save(CommonEventSource evt)
            throws PersistenceException

存储的key使用的是txnId，value为txn的字节流

返回:

返回的是txnId

抛出:

PersistenceException

houseKeeping

public void houseKeeping()
                  throws PersistenceException

抛出:

PersistenceException

list

public List<EventSourceWrapper> list(int batchSize)
                              throws PersistenceException

抛出:

PersistenceException - 由于LevelDB不支持分页，所以每次取batchSize容量

get

public <T> T get(String key,
                 Class<T> type)
          throws PersistenceException

抛出:

PersistenceException

getMore

public <T> List<T> getMore(Class<T> type,
                           String... keys)
                    throws PersistenceException

抛出:

PersistenceException

list

public List<EventSourceWrapper> list(int batchSize,
                                     org.iq80.leveldb.DBIterator iterator)
                              throws PersistenceException

抛出:

PersistenceException

getIterator

public org.iq80.leveldb.DBIterator getIterator()

deleteById

public void deleteById(String[] ids)
                throws PersistenceException

抛出:

PersistenceException

deleteById

protected void deleteById(String txnId)

put

public void put(String key,
                Serializable ser)
         throws PersistenceException

抛出:

PersistenceException

put

public void put(String key,
                Serializable ser,
                org.iq80.leveldb.WriteBatch update)
         throws PersistenceException

抛出:

PersistenceException

getDb

public org.iq80.leveldb.DB getDb()

clear

public void clear()
           throws IOException

抛出:

IOException

_clear

protected int _clear()
              throws IOException

抛出:

IOException

getOpenLogger

public Boolean getOpenLogger()

setOpenLogger

public void setOpenLogger(Boolean openLogger)