lumis.portal.filesystem.impl

Class ClusterMirroredLocalDataFile

java.lang.Object

lumis.portal.filesystem.IFile

lumis.portal.filesystem.impl.ClusterMirroredLocalDataFile

All Implemented Interfaces:

Serializable, IInputStreamProvider

public class ClusterMirroredLocalDataFile
extends IFile

A local data file that has its changes replicated over the cluster.

Since:

8.0.0

Version:

$Revision: 22716 $ $Date: 2019-05-06 20:16:41 +0000 (Mon, 06 May 2019) $

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ClusterMirroredLocalDataFile(String relativePath) Creates a new instance for the given relative path.

Method Summary

Modifier and Type	Method and Description
protected String	calculateBasePath() Returns the base file system path for this file.
protected void	copyRegularFileTo(IFile dest) Copies this file, assuming it is a regular file, to the specified destination.
void	copyTo(IFile dest) Copies the file denoted by this logical filesystem object.
void	delete() Deletes the file or directory.
void	deleteRecursively() Tries to delete the file or directory recursively.
boolean	exists() Tests whether the file or directory exists.
File	getFile() Returns the file.
InputStream	getInputStream() Returns an InputStream to be used to read this file.
long	getLastModified() Returns the time that the file or directory was last modified.
long	getLength() Returns the length of the file.
OutputStream	getOutputStream() Returns an OutputStream that writes to this file.
ClusterMirroredLocalDataFile	getParent() Returns the parent directory.
ClusterMirroredLocalDataFile	getRoot() Returns the root folder of this file.
boolean	isDirectory() Tests whether the file is a directory.
boolean	isFile() Tests whether the file denoted by this IFile is an actual file.
IFile[]	listFiles() Lists all immediate sub files and directories of this directory (the files and directories whose IFile.getParent() is equal to this).
void	mkdirs() Creates the directory named by this logical filesystem object, including any necessary but nonexistent parent directories.
byte[]	readBytes() Reads this file content in bytes.
void	renameTo(IFile dest) Renames the file denoted by this logical filesystem object.
ClusterMirroredLocalDataFile	resolve(String relativePath) Resolves the given path against this file.
void	setLastModified(long time) Sets the last-modified time of the file or directory.
LocalDataFile	toLocalDataFile() Returns a LocalDataFile of the same relative path of this file.
URL	toURL() Returns a URL that represents this file.
void	write(InputStream inputStream) Copies the given input stream's content into this file.

Methods inherited from class lumis.portal.filesystem.IFile

equals, getExtension, getName, getPath, hashCode, isDescendentOf, isEmpty, isRoot, listFiles, readString, readString, relativize, toString, write, write, write, write

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ClusterMirroredLocalDataFile

public ClusterMirroredLocalDataFile(String relativePath)

Creates a new instance for the given relative path.

Parameters:

relativePath -

Since:

8.0.0

Method Detail

calculateBasePath

protected String calculateBasePath()

Returns the base file system path for this file.

Returns:

the base file system path for this file.

getFile

public File getFile()

Returns the file.

Returns:

the file.

getParent

public ClusterMirroredLocalDataFile getParent()

Description copied from class: IFile

Returns the parent directory. If this is already the root of the base folder defined in portal file path, null is returned. In other words, if IFile.getPath().getRelativePath() is an empty string, null is returned.

Overrides:

getParent in class IFile

Returns:

the parent directory

See Also:

PortalFilePath.getParent()

getRoot

public ClusterMirroredLocalDataFile getRoot()

Description copied from class: IFile

Returns the root folder of this file. If this file is already the root, then an equivalent object will be returned.

Overrides:

getRoot in class IFile

Returns:

the root folder of this file.

resolve

public ClusterMirroredLocalDataFile resolve(String relativePath)

Description copied from class: IFile

Resolves the given path against this file. The path must not be an absolute path. In other words, it cannot begin with a /.

The path of a file is composed by elements separated by /. The resolve process consists in create a new file using this file's relative path concatenated with a / and the given relative path. If the given relative path contains an element .. it means this .. and the previous element will be eliminated (for example my/folder/../file.txt will become my/file.txt).

Overrides:

resolve in class IFile

Parameters:

relativePath - the relative path to be resolved.

Returns:

a file relative to this one.

See Also:

PortalFilePath.resolve(String)

toLocalDataFile

public LocalDataFile toLocalDataFile()

Returns a LocalDataFile of the same relative path of this file.

Returns:

a LocalDataFile of the same relative path of this file.

Since:

8.0.0

delete

public void delete()
            throws IOException

Description copied from class: IFile

Deletes the file or directory. If this denotes a directory, then the directory must be empty in order to be deleted. If this file doesn't exist already, no exception will be raised.

Throws:

FileCouldNotBeDeletedException - if this file could not be deleted

IOException - if other error occur

deleteRecursively

public void deleteRecursively()
                       throws IOException

Description copied from class: IFile

Tries to delete the file or directory recursively. If the deletion of some file or directory fails the deletion will not be complete, but some files and/or directories might already have been deleted.

In other words, it is not guaranteed that either all files and directories will be deleted or none of the files and directories will be deleted.

If this file doesn't exist already, no exception will be raised.

Throws:

FileCouldNotBeDeletedException - if some file or directory couldn't be deleted

IOException - if other error occur

mkdirs

public void mkdirs()
            throws IOException

Description copied from class: IFile

Creates the directory named by this logical filesystem object, including any necessary but nonexistent parent directories. Note that if this operation fails it may have succeeded in creating some of the necessary parent directories.

Throws:

DirectoryCouldNotBeCreatedException - if some of the needed directories could not be created

IOException - if other error occur

renameTo

public void renameTo(IFile dest)
              throws FileCouldNotBeRenamedException,
                     FileAlreadyExistsException,
                     FileNotFoundException,
                     IOException

Description copied from class: IFile

Renames the file denoted by this logical filesystem object. This operation is equivalent to:

copyTo(dest);
deleteRecursively();

The rules of this operation follows the rules of IFile.copyTo(IFile) and IFile.deleteRecursively().

Parameters:

dest - The new logical filesystem object for the named file

Throws:

FileCouldNotBeRenamedException - if the file could not be renamed for some reason

FileNotFoundException - if this file doesn't exist

IOException - if other error occur

FileAlreadyExistsException

getInputStream

public InputStream getInputStream()
                           throws IOException

Description copied from class: IFile

Returns an InputStream to be used to read this file.

If the named file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading then a FileNotFoundException is thrown.

The stream must be closed by the caller of this method. A try-finally statement is recommended to guarantee it is closed.

Specified by:

getInputStream in interface IInputStreamProvider

Returns:

an InputStream to be used to read this file.

Throws:

FileNotFoundException - If the named file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading

IOException - If an I/O error occurred

getOutputStream

public OutputStream getOutputStream()
                             throws IOException

Description copied from class: IFile

Returns an OutputStream that writes to this file.

Any existent content in the file will be discarded and replaced with the content written to this output stream.

The new file content will only be available after OutputStream.close() is called.

If the file exists but is a directory rather than a regular file, does not exist but cannot be created, the parent directory does not exist, or cannot be opened for any other reason then a FileNotFoundException is thrown. This exception can be thrown in at any time between this call and the call of OutputStream.close().

The stream must be closed by the caller of this method. A try-finally statement is recommended to guarantee it is closed.

Returns:

an OutputStream to be used to write this file.

Throws:

FileNotFoundException - If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason

IOException - If an I/O error occurred

setLastModified

public void setLastModified(long time)
                     throws IOException

Description copied from class: IFile

Sets the last-modified time of the file or directory.

Parameters:

time - The new last-modified time, measured in milliseconds since the epoch (00:00:00 GMT, January 1, 1970)

Throws:

FileNotFoundException - If this file does not exist

IOException - if other error occur

copyTo

public void copyTo(IFile dest)
            throws IOException

Description copied from class: IFile

Copies the file denoted by this logical filesystem object.

This operation will copy this file or directory to the target file or directory using the following criteria:

• If this file does not exist, a FileNotFoundException will be raised.
• If this file is a regular file:
  • If the target file does not exist, the target file will be created using this file's content.
  • If the target file is an already existent regular file, the target's content will be replaced by this file's content.
  • If the target file is not a regular file, a FileNotFoundException will be raised.
• If this file is a directory:
  • If the target file does not exist, the target file will be created as a directory and this file's children will be copied recursively.
  • If the target file is a directory, this file's children will be copied recursively. Those files that already existed in the target but does not exist in this file will not be removed.
  • If the target file exists and is not a directory, a FileNotFoundException will be raised.
  In the case this file is a directory, it is important to notice that if some error occur during the copy of some subfile, some files might already have been copied and/or some directories might already have been created.
• If this file exists but it isn't neither a regular file nor a directory, a FileNotFoundException will be raised.

Overrides:

copyTo in class IFile

Parameters:

dest - The new logical filesystem object for the named file

Throws:

FileNotFoundException - if this file doesn't exist

FileCouldNotBeCopiedException - if some error occur during copy

IOException - if other error occur

exists

public boolean exists()
               throws IOException

Description copied from class: IFile

Tests whether the file or directory exists.

Specified by:

exists in class IFile

Returns:

true if and only if the file or directory exists; false otherwise

Throws:

IOException - if some error occur during this operation

isDirectory

public boolean isDirectory()
                    throws IOException

Description copied from class: IFile

Tests whether the file is a directory.

Specified by:

isDirectory in class IFile

Returns:

true if and only if the file exists and is a directory; false otherwise

Throws:

IOException - if some error occur during this operation

isFile

public boolean isFile()
               throws IOException

Description copied from class: IFile

Tests whether the file denoted by this IFile is an actual file. This test might be system-dependent.

Specified by:

isFile in class IFile

Returns:

true if and only if the file denoted by this IFile exists and is an actual file; false otherwise

Throws:

IOException - if some error occur during this operation

listFiles

public IFile[] listFiles()
                  throws IOException

Description copied from class: IFile

Lists all immediate sub files and directories of this directory (the files and directories whose IFile.getParent() is equal to this).

Specified by:

listFiles in class IFile

Returns:

all immediate sub files and directories of this directory; an empty list if this directory has no files and no directories.

Throws:

FileNotFoundException - if this file doesn't exist

FileIsNotDirectoryException - if this file does not denote a directory

IOException - if other error occur

getLastModified

public long getLastModified()
                     throws IOException

Description copied from class: IFile

Returns the time that the file or directory was last modified.

Specified by:

getLastModified in class IFile

Returns:

A long value representing the time the file was last modified, measured in milliseconds since the epoch (00:00:00 GMT, January 1, 1970)

Throws:

FileNotFoundException - If this file does not exist

IOException - if other error occur

getLength

public long getLength()
               throws IOException

Description copied from class: IFile

Returns the length of the file.

Specified by:

getLength in class IFile

Returns:

The length, in bytes, of the file.

Throws:

NotFileException - if this is not a file

FileNotFoundException - If this file does not exist

IOException - if other error occur

copyRegularFileTo

protected void copyRegularFileTo(IFile dest)
                          throws IOException

Description copied from class: IFile

Copies this file, assuming it is a regular file, to the specified destination.

Overrides:

copyRegularFileTo in class IFile

Parameters:

dest - the copy destination.

Throws:

IOException - if I/O error occurred.

write

public void write(InputStream inputStream)
           throws IOException

Description copied from class: IFile

Copies the given input stream's content into this file.

Overrides:

write in class IFile

Parameters:

inputStream - the input stream.

Throws:

IOException

readBytes

public byte[] readBytes()
                 throws IOException

Description copied from class: IFile

Reads this file content in bytes.

Overrides:

readBytes in class IFile

Returns:

this file content in bytes.

Throws:

IOException

toURL

public URL toURL()
          throws IOException

Description copied from class: IFile

Returns a URL that represents this file. The URL must, at least, provide means of accessing this file's input stream by implementing URLConnection.getInputStream().

Specified by:

toURL in class IFile

Returns:

a URL that represents this file.

Throws:

IOException - if some error occur.