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Java Source Code / Java Documentation » Database DBMS » Quadcap Embeddable Database » com.quadcap.sql.file 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   com.quadcap.sql.file.BlockStore
      com.quadcap.sql.file.MemoryBlockStore

MemoryBlockStore
public class MemoryBlockStore extends BlockStore (Code)
Below the cache, this class handles the actual I/O to the underlying file. Block write operations are logged by this class.
author:
   Stan Bailes


Field Summary
 LongMapblocks
    

Constructor Summary
public  MemoryBlockStore()
    

Method Summary
public  voidclose()
    
public  voidflush()
    
public  voidinit(File file, String mode, int blockSize, Object lock)
     Initialize a new BlockStore object using the specified file and blocksize.
public  booleanisEncrypted()
    
public  voidread(long blockNum, byte[] buf, int off)
     Read a block into a buffer.
public  voidrestore(long blockNum, byte[] buf, int off)
    
public static  Stringrw()
    
public  voidsetKey(com.quadcap.crypto.SymmetricKey key)
    
public  voidsetLength(long length)
    
public  StringtoString()
    
public  voidwrite(long blockNum, byte[] buf)
     Write a block from a buffer into the file.

Field Detail
blocks
LongMap blocks(Code)




Constructor Detail
MemoryBlockStore
public MemoryBlockStore()(Code)




Method Detail
close
public void close() throws IOException(Code)



flush
public void flush() throws IOException(Code)



init
public void init(File file, String mode, int blockSize, Object lock) throws IOException(Code)
Initialize a new BlockStore object using the specified file and blocksize.
Parameters:
  file - the underlying file.
Parameters:
  mode - "r" for readonly access, otherwise "rw"
Parameters:
  blocksize - the block size to use when creating the file.
Parameters:
  the - synchronization object



isEncrypted
public boolean isEncrypted()(Code)



read
public void read(long blockNum, byte[] buf, int off) throws IOException(Code)
Read a block into a buffer. If the specified block is beyond the current end of file, then grow the file
Parameters:
  blockNum - the number of the block to read.
Parameters:
  buf - the buffer into which the data is read.



restore
public void restore(long blockNum, byte[] buf, int off) throws IOException(Code)
Restore a block image



rw
public static String rw()(Code)



setKey
public void setKey(com.quadcap.crypto.SymmetricKey key) throws IOException(Code)



setLength
public void setLength(long length) throws IOException(Code)



toString
public String toString()(Code)



write
public void write(long blockNum, byte[] buf) throws IOException(Code)
Write a block from a buffer into the file.
Parameters:
  blockNum - the number of the block to write.
Parameters:
  buf - the buffer from which the data is written.
exception:
  IOException - if an I/O error occurs.



Fields inherited from com.quadcap.sql.file.BlockStore
int blockSize(Code)(Java Doc)
boolean encrypted(Code)(Java Doc)
File file(Code)(Java Doc)
FileRandomAccess fra(Code)(Java Doc)
boolean isTempFile(Code)(Java Doc)
Object lock(Code)(Java Doc)
Log log(Code)(Java Doc)
BitSet modified(Code)(Java Doc)
public static int readCount(Code)(Java Doc)
boolean readOnly(Code)(Java Doc)
public static int writeCount(Code)(Java Doc)

Methods inherited from com.quadcap.sql.file.BlockStore
public int blockSize()(Code)(Java Doc)
public void clearModified() throws IOException(Code)(Java Doc)
public void close() throws IOException(Code)(Java Doc)
public void flush() throws IOException(Code)(Java Doc)
public File getFile()(Code)(Java Doc)
public Log getLog()(Code)(Java Doc)
public String getName()(Code)(Java Doc)
public void init(File file, String mode, int blockSize, Object lock) throws IOException(Code)(Java Doc)
public boolean isEncrypted()(Code)(Java Doc)
final protected byte[] newHeader(int blockSize, long lastBlock)(Code)(Java Doc)
public void read(long blockNum, byte[] buf) throws IOException(Code)(Java Doc)
public void read(long blockNum, byte[] buf, int off) throws IOException(Code)(Java Doc)
public void restore(long blockNum, byte[] buf, int off) throws IOException(Code)(Java Doc)
public static String rw()(Code)(Java Doc)
public void setKey(com.quadcap.crypto.SymmetricKey key) throws IOException(Code)(Java Doc)
public void setLength(long length) throws IOException(Code)(Java Doc)
public void setLog(Log log)(Code)(Java Doc)
public String toString()(Code)(Java Doc)
public void write(long blockNum, byte[] buf) throws IOException(Code)(Java Doc)

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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