lumis.portal.filesystem

Class FileSystemManager

java.lang.Object

lumis.portal.filesystem.FileSystemManager

All Implemented Interfaces:

IFileSystemManager

public class FileSystemManager
extends Object
implements IFileSystemManager

Implementation of the file system manager.

Since:

4.1.0

Version:

$Revision: 11902 $ $Date: 2010-09-02 19:33:39 -0300 (Thu, 02 Sep 2010) $

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FileSystemManager.WriteFileCommand Command used to perform the write operation of a file.

Constructor Summary

Constructors

Constructor and Description
FileSystemManager()

Method Summary

Methods

Modifier and Type	Method and Description
void	copyFile(PortalFile source, PortalFile destination) Performs a file copy.
void	lockFileForRead(File file) Locks a file for reading operations.
void	lockFileForWrite(File file) Locks a file for writing operations.
void	unlockFileForRead(File file) Unlocks a file locked by IFileSystemManager.lockFileForRead(File).
void	unlockFileForWrite(File file) Unlocks a file locked by IFileSystemManager.lockFileForWrite(File).
void	writeFile(PortalFile file, byte[] content) Writes content in the specified file.
void	writeFile(PortalFile file, InputStream content) Writes content in the specified file.

Methods inherited from class java.lang.Object

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

Constructor Detail

FileSystemManager

public FileSystemManager()

Method Detail

lockFileForRead

public void lockFileForRead(File file)

Description copied from interface: IFileSystemManager

Locks a file for reading operations. This lock is obeyed only by threads in the same JVM that also use a lock method available in this manager.

Many threads may acquire read locks simultaneously, but if a thread acquire a write lock for a file, no other thread can acquire any lock. If the file is already locked anyway that this thread cannot acquire the lock, it is blocked until the lock can be acquired.

IFileSystemManager.unlockFileForRead(File) must be executed after this method. A try/finally block should be used in order to guarantee this.

Specified by:

lockFileForRead in interface IFileSystemManager

Parameters:

file - the file to be locked.

See Also:

IFileSystemManager.unlockFileForRead(File), IFileSystemManager.lockFileForWrite(File)

unlockFileForRead

public void unlockFileForRead(File file)

Description copied from interface: IFileSystemManager

Unlocks a file locked by IFileSystemManager.lockFileForRead(File).

Specified by:

unlockFileForRead in interface IFileSystemManager

Parameters:

file - the file to be unlocked.

See Also:

IFileSystemManager.lockFileForRead(File)

lockFileForWrite

public void lockFileForWrite(File file)

Description copied from interface: IFileSystemManager

Locks a file for writing operations. This lock is obeyed only by threads in the same JVM that also use a lock method available in this manager.

Many threads may acquire read locks simultaneously, but if a thread acquire a write lock for a file, no other thread can acquire any lock. If the file is already locked anyway that this thread cannot acquire the lock, it is blocked until the lock can be acquired.

IFileSystemManager.unlockFileForWrite(File) must be executed after this method. A try/finally block should be used in order to guarantee this.

Specified by:

lockFileForWrite in interface IFileSystemManager

Parameters:

file - the file to be locked.

See Also:

IFileSystemManager.unlockFileForWrite(File), IFileSystemManager.lockFileForRead(File)

unlockFileForWrite

public void unlockFileForWrite(File file)

Description copied from interface: IFileSystemManager

Unlocks a file locked by IFileSystemManager.lockFileForWrite(File).

Specified by:

unlockFileForWrite in interface IFileSystemManager

Parameters:

file - the file to be unlocked.

See Also:

IFileSystemManager.lockFileForWrite(File)

writeFile

public void writeFile(PortalFile file,
             byte[] content)
               throws IOException

Description copied from interface: IFileSystemManager

Writes content in the specified file. The change is replicated across the cluster.

Specified by:

writeFile in interface IFileSystemManager

Parameters:

file - the file to write. If it already exists it is overwritten.

content - the content.

Throws:

IOException

writeFile

public void writeFile(PortalFile file,
             InputStream content)
               throws IOException

Description copied from interface: IFileSystemManager

Writes content in the specified file. The change is replicated across the cluster.

Specified by:

writeFile in interface IFileSystemManager

Parameters:

file - the file to write. If it already exists it is overwritten.

content - the content.

Throws:

IOException

copyFile

public void copyFile(PortalFile source,
            PortalFile destination)
              throws IOException

Description copied from interface: IFileSystemManager

Performs a file copy. The copy operation is repeated across the cluster.

Specified by:

copyFile in interface IFileSystemManager

Parameters:

source - the source file.

destination - the destination file. If it already exists it is overwritten.

Throws:

IOException