org.apache.derby.impl.io

Class DirRandomAccessFile

java.lang.Object

java.io.RandomAccessFile

org.apache.derby.impl.io.DirRandomAccessFile

All Implemented Interfaces:

java.io.Closeable, java.io.DataInput, java.io.DataOutput, java.lang.AutoCloseable, StorageRandomAccessFile

 class DirRandomAccessFile
extends java.io.RandomAccessFile
implements StorageRandomAccessFile

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

Constructors

Constructor and Description
DirRandomAccessFile(java.io.File name, java.lang.String mode) Construct a StorageRandomAccessFileImpl.

Method Summary

Methods

Modifier and Type	Method and Description
void	sync() Force any changes out to the persistent store.

Methods inherited from class java.io.RandomAccessFile

close, getChannel, getFD, getFilePointer, length, read, read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, seek, setLength, skipBytes, write, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.derby.io.StorageRandomAccessFile

close, getFilePointer, length, read, seek, setLength

Methods inherited from interface java.io.DataInput

readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, skipBytes

Methods inherited from interface java.io.DataOutput

write, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

Constructor Detail

DirRandomAccessFile

DirRandomAccessFile(java.io.File name,
                   java.lang.String mode)
              throws java.io.FileNotFoundException

Construct a StorageRandomAccessFileImpl.

Parameters:

name - The file name.

mode - The file open mode: "r", "rw", "rws", or "rwd". The "rws" and "rwd" modes specify that the file is to be synchronized, consistent with the java.io.RandomAccessFile class. However the StorageRandomAccessFile.sync() method will be called even if the file was opened in "rws" or "rwd" mode. If the "rws" or "rwd" modes are supported then the implementation of StorageRandomAccessFile.sync need not do anything.

Throws:

java.lang.IllegalArgumentException - if the mode argument is not equal to one of "r", "rw".

java.io.FileNotFoundException - if the file exists but is a directory rather than a regular file, or cannot be opened or created for any other reason .

Method Detail

sync

public void sync()
          throws java.io.IOException

Force any changes out to the persistent store.

Specified by:

sync in interface StorageRandomAccessFile

Throws:

java.io.IOException - If an IO error occurs.