Package org.apache.commons.compress.archivers.zip

Class ScatterZipOutputStream

java.lang.Object

org.apache.commons.compress.archivers.zip.ScatterZipOutputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class ScatterZipOutputStream
extends Object
implements Closeable

A ZIP output stream that is optimized for multi-threaded scatter/gather construction of ZIP files.

The internal data format of the entries used by this class are entirely private to this class and are not part of any public api whatsoever.

It is possible to extend this class to support different kinds of backing storage, the default implementation only supports file-based backing.

Thread safety: This class supports multiple threads. But the "writeTo" method must be called by the thread that originally created the ZipArchiveEntry.

Since:

1.10

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ScatterZipOutputStream.ZipEntryWriter

Constructor Summary

Constructors

Constructor	Description
ScatterZipOutputStream(ScatterGatherBackingStore backingStore, StreamCompressor streamCompressor)

Method Summary

Modifier and Type	Method	Description
void	addArchiveEntry(ZipArchiveEntryRequest zipArchiveEntryRequest)	Adds an archive entry to this scatter stream.
void	close()	Closes this stream, freeing all resources involved in the creation of this stream.
static ScatterZipOutputStream	fileBased(File file)	Creates a ScatterZipOutputStream with default compression level that is backed by a file
static ScatterZipOutputStream	fileBased(File file, int compressionLevel)	Creates a ScatterZipOutputStream that is backed by a file
static ScatterZipOutputStream	pathBased(Path path)	Creates a ScatterZipOutputStream with default compression level that is backed by a file
static ScatterZipOutputStream	pathBased(Path path, int compressionLevel)	Creates a ScatterZipOutputStream that is backed by a file
void	writeTo(ZipArchiveOutputStream target)	Writes the contents of this scatter stream to a target archive.
ScatterZipOutputStream.ZipEntryWriter	zipEntryWriter()	Gets a ZIP entry writer for this scatter stream.

Methods inherited from class java.lang.Object

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

Constructor Details

ScatterZipOutputStream

public ScatterZipOutputStream(ScatterGatherBackingStore backingStore,
 StreamCompressor streamCompressor)

Method Details

fileBased

public static ScatterZipOutputStream fileBased(File file)
                                        throws FileNotFoundException

Creates a ScatterZipOutputStream with default compression level that is backed by a file

Parameters:

file - The file to offload compressed data into.

Returns:

A ScatterZipOutputStream that is ready for use.

Throws:

FileNotFoundException - if the file cannot be found

fileBased

public static ScatterZipOutputStream fileBased(File file,
 int compressionLevel)
                                        throws FileNotFoundException

Creates a ScatterZipOutputStream that is backed by a file

Parameters:

file - The file to offload compressed data into.

compressionLevel - The compression level to use, @see #Deflater

Returns:

A ScatterZipOutputStream that is ready for use.

Throws:

FileNotFoundException - if the file cannot be found

pathBased

public static ScatterZipOutputStream pathBased(Path path)
                                        throws FileNotFoundException

Creates a ScatterZipOutputStream with default compression level that is backed by a file

Parameters:

path - The path to offload compressed data into.

Returns:

A ScatterZipOutputStream that is ready for use.

Throws:

FileNotFoundException - if the path cannot be found

Since:

1.22

pathBased

public static ScatterZipOutputStream pathBased(Path path,
 int compressionLevel)
                                        throws FileNotFoundException

Creates a ScatterZipOutputStream that is backed by a file

Parameters:

path - The path to offload compressed data into.

compressionLevel - The compression level to use, @see #Deflater

Returns:

A ScatterZipOutputStream that is ready for use.

Throws:

FileNotFoundException - if the path cannot be found

Since:

1.22

addArchiveEntry

public void addArchiveEntry(ZipArchiveEntryRequest zipArchiveEntryRequest)
                     throws IOException

Adds an archive entry to this scatter stream.

Parameters:

zipArchiveEntryRequest - The entry to write.

Throws:

IOException - If writing fails

close

public void close()
           throws IOException

Closes this stream, freeing all resources involved in the creation of this stream.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException - If closing fails

writeTo

public void writeTo(ZipArchiveOutputStream target)
             throws IOException

Writes the contents of this scatter stream to a target archive.

Parameters:

target - The archive to receive the contents of this ScatterZipOutputStream.

Throws:

IOException - If writing fails

See Also:

• zipEntryWriter()

zipEntryWriter

public ScatterZipOutputStream.ZipEntryWriter zipEntryWriter()
                                                     throws IOException

Gets a ZIP entry writer for this scatter stream.

Returns:

the ZipEntryWriter created on first call of the method

Throws:

IOException - If getting scatter stream input stream