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Java Source Code / Java Documentation » JMX » je » com.sleepycat.je.log 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   com.sleepycat.je.log.LogBuffer

LogBuffer
class LogBuffer implements LogSource(Code)
DbLogBuffers hold outgoing, newly written log entries.



Constructor Summary
 LogBuffer(int capacity, EnvironmentImpl env)
    
 LogBuffer(ByteBuffer buffer, long firstLsn)
    

Method Summary
 booleancontainsLsn(long lsn)
     Support for reading a log entry out of a still-in-memory log true if this buffer holds the entry at this LSN.
public  ByteBuffergetBytes(long fileOffset)
    
public  ByteBuffergetBytes(long fileOffset, int numBytes)
    
 intgetCapacity()
    
 ByteBuffergetDataBuffer()
    
 longgetFirstLsn()
     Return first LSN held in this buffer.
 booleangetRewriteAllowed()
    
 booleanhasRoom(int numBytes)
     Check capacity of buffer.
public  voidlatchForWrite()
     When modifying the buffer, acquire the readLatch.
 voidregisterLsn(long lsn)
     This LSN has been written to the log.
 voidreinit()
    
public  voidrelease()
    
 voidsetRewriteAllowed()
    


Constructor Detail
LogBuffer
LogBuffer(int capacity, EnvironmentImpl env) throws DatabaseException(Code)



LogBuffer
LogBuffer(ByteBuffer buffer, long firstLsn) throws DatabaseException(Code)




Method Detail
containsLsn
boolean containsLsn(long lsn) throws DatabaseException(Code)
Support for reading a log entry out of a still-in-memory log true if this buffer holds the entry at this LSN. Thebuffer will be latched for read. Returns false ifLSN is not here, and releases the read latch.



getBytes
public ByteBuffer getBytes(long fileOffset)(Code)

See Also:   LogSource.getBytes



getBytes
public ByteBuffer getBytes(long fileOffset, int numBytes)(Code)

See Also:   LogSource.getBytes



getCapacity
int getCapacity()(Code)
capacity in bytes



getDataBuffer
ByteBuffer getDataBuffer()(Code)
the actual data buffer.



getFirstLsn
long getFirstLsn()(Code)
Return first LSN held in this buffer. Assumes the log write latch is held.



getRewriteAllowed
boolean getRewriteAllowed()(Code)



hasRoom
boolean hasRoom(int numBytes)(Code)
Check capacity of buffer. Assumes that the log write latch is held. true if this buffer can hold this many more bytes.



latchForWrite
public void latchForWrite() throws DatabaseException(Code)
When modifying the buffer, acquire the readLatch. Call release() to release the latch. Note that containsLsn() acquires the latch for reading.



registerLsn
void registerLsn(long lsn) throws DatabaseException(Code)
This LSN has been written to the log.



reinit
void reinit() throws DatabaseException(Code)



release
public void release() throws DatabaseException(Code)

See Also:   LogSource.release



setRewriteAllowed
void setRewriteAllowed()(Code)



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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