Java Doc for DirRandomAccessFile.java in  » Database-DBMS » db-derby-10.2 » org » apache » derby » impl » io » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.impl.io 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   java.io.RandomAccessFile
      org.apache.derby.impl.io.DirRandomAccessFile

All known Subclasses:   org.apache.derby.impl.io.DirRandomAccessFile4,
DirRandomAccessFile
class DirRandomAccessFile extends RandomAccessFile implements StorageRandomAccessFile(Code)
This class provides a disk based implementation of the StIRandomAccess File interface. It is used by the database engine to access persistent data and transaction logs under the directory (default) subsubprotocol.



Constructor Summary
 DirRandomAccessFile(File name, String mode)
     Construct a StorageRandomAccessFileImpl.
Parameters:
  name - The file name.
Parameters:
  mode - The file open mode: "r", "rw", "rws", or "rwd".

Method Summary
public  voidsync(boolean metaData)
     Force any changes out to the persistent store.


Constructor Detail
DirRandomAccessFile
DirRandomAccessFile(File name, String mode) throws FileNotFoundException(Code)
Construct a StorageRandomAccessFileImpl.
Parameters:
  name - The file name.
Parameters:
  mode - The file open mode: "r", "rw", "rws", or "rwd". The "rws" and "rwd" modes specify that the file is tobe synchronized, consistent with the java.io.RandomAccessFile class. However theStorageRandomAccessFile.sync() method will be called even if the file was openedin "rws" or "rwd" mode. If the "rws" or "rwd" modes are supported then the implementationof StorageRandomAccessFile.sync need not do anything.
exception:
  IllegalArgumentException - if the mode argument is not equal to one of "r", "rw".
exception:
  FileNotFoundException - if the file exists but is a directory rather than a regularfile, or cannot be opened or created for any other reason .




Method Detail
sync
public void sync(boolean metaData) throws IOException(Code)
Force any changes out to the persistent store.
Parameters:
  metaData - If true then this method is required to force changes to both the file'scontent and metadata to be written to storage; otherwise, it need only force content changesto be written.
exception:
  IOException - If an IO error occurs.



Methods inherited from java.io.RandomAccessFile
public void close() throws IOException(Code)(Java Doc)
final public FileChannel getChannel()(Code)(Java Doc)
final public FileDescriptor getFD() throws IOException(Code)(Java Doc)
native public long getFilePointer() throws IOException(Code)(Java Doc)
native public long length() throws IOException(Code)(Java Doc)
native public int read() throws IOException(Code)(Java Doc)
public int read(byte b, int off, int len) throws IOException(Code)(Java Doc)
public int read(byte b) throws IOException(Code)(Java Doc)
final public boolean readBoolean() throws IOException(Code)(Java Doc)
final public byte readByte() throws IOException(Code)(Java Doc)
final public char readChar() throws IOException(Code)(Java Doc)
final public double readDouble() throws IOException(Code)(Java Doc)
final public float readFloat() throws IOException(Code)(Java Doc)
final public void readFully(byte b) throws IOException(Code)(Java Doc)
final public void readFully(byte b, int off, int len) throws IOException(Code)(Java Doc)
final public int readInt() throws IOException(Code)(Java Doc)
final public String readLine() throws IOException(Code)(Java Doc)
final public long readLong() throws IOException(Code)(Java Doc)
final public short readShort() throws IOException(Code)(Java Doc)
final public String readUTF() throws IOException(Code)(Java Doc)
final public int readUnsignedByte() throws IOException(Code)(Java Doc)
final public int readUnsignedShort() throws IOException(Code)(Java Doc)
native public void seek(long pos) throws IOException(Code)(Java Doc)
native public void setLength(long newLength) throws IOException(Code)(Java Doc)
public int skipBytes(int n) throws IOException(Code)(Java Doc)
native public void write(int b) throws IOException(Code)(Java Doc)
public void write(byte b) throws IOException(Code)(Java Doc)
public void write(byte b, int off, int len) throws IOException(Code)(Java Doc)
final public void writeBoolean(boolean v) throws IOException(Code)(Java Doc)
final public void writeByte(int v) throws IOException(Code)(Java Doc)
final public void writeBytes(String s) throws IOException(Code)(Java Doc)
final public void writeChar(int v) throws IOException(Code)(Java Doc)
final public void writeChars(String s) throws IOException(Code)(Java Doc)
final public void writeDouble(double v) throws IOException(Code)(Java Doc)
final public void writeFloat(float v) throws IOException(Code)(Java Doc)
final public void writeInt(int v) throws IOException(Code)(Java Doc)
final public void writeLong(long v) throws IOException(Code)(Java Doc)
final public void writeShort(int v) throws IOException(Code)(Java Doc)
final public void writeUTF(String str) 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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