Java Doc for BlockStore.java in  » Database-DBMS » Quadcap-Embeddable-Database » com » quadcap » sql » file » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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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 All known Subclasses:   com.quadcap.sql.file.MemoryBlockStore,  com.quadcap.sql.file.EncryptedBlockStore,  com.quadcap.sql.file.NullStore, BlockStore public class 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  int blockSize       boolean encrypted       File file       FileRandomAccess fra       boolean isTempFile       Object lock       Log log       BitSet modified      public static  int readCount       boolean readOnly      public static  int writeCount      Constructor Summary public   BlockStore()      Create a new BlockStore object using the specified file and blocksize. Method Summary public  int blockSize()      Return the block size of this store. public  void clearModified()      public  void close()      public  void flush()      public  File getFile()      public  Log getLog()      public  String getName()      public  void init(File file, String mode, int blockSize, Object lock)      public  boolean isEncrypted()      final protected  byte[] newHeader(int blockSize, long lastBlock)      public  void read(long blockNum, byte[] buf)      Read a block into a buffer. public  void read(long blockNum, byte[] buf, int off)      public  void restore(long blockNum, byte[] buf, int off)      public static  String rw()      public  void setKey(com.quadcap.crypto.SymmetricKey key)      public  void setLength(long length)      public  void setLog(Log log)      Specify the log used for recovery operations. public  String toString()      public  void write(long blockNum, byte[] buf)      Write a block from a buffer into the file. Field Detail blockSize int blockSize(Code) encrypted boolean encrypted(Code) file File file(Code) fra FileRandomAccess fra(Code) isTempFile boolean isTempFile(Code) lock Object lock(Code) log Log log(Code) modified BitSet modified(Code) readCount public static int readCount(Code) readOnly boolean readOnly(Code) writeCount public static int writeCount(Code) Constructor Detail BlockStore public BlockStore()(Code) Create 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 Method Detail blockSize public int blockSize()(Code) Return the block size of this store. clearModified public void clearModified() throws IOException(Code) close public void close() throws IOException(Code) flush public void flush() throws IOException(Code) getFile public File getFile()(Code) Return the underlying file getLog public Log getLog()(Code) Return the logger getName public String getName()(Code) init public void init(File file, String mode, int blockSize, Object lock) throws IOException(Code) isEncrypted public boolean isEncrypted()(Code) newHeader final protected byte[] newHeader(int blockSize, long lastBlock)(Code) read public void read(long blockNum, byte[] buf) 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. read public void read(long blockNum, byte[] buf, int off) throws IOException(Code) 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) setLog public void setLog(Log log)(Code) Specify the log used for recovery operations. 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. 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)