org.apache.nifi.nar

Class NarUnpacker

java.lang.Object

org.apache.nifi.nar.NarUnpacker

public final class NarUnpacker
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
private static String	HASH_FILENAME
private static org.slf4j.Logger	logger
private static FileFilter	NAR_FILTER

Constructor Summary

Constructors

Modifier	Constructor and Description
private	NarUnpacker()

Method Summary

Methods

Modifier and Type	Method and Description
private static byte[]	calculateMd5sum(File file) Calculates an md5 sum of the specified file.
private static void	determineDocumentedNiFiComponents(File jar, ExtensionMapping extensionMapping)
private static List<String>	determineDocumentedNiFiComponents(JarFile jarFile, JarEntry jarEntry)
private static void	makeFile(InputStream inputStream, File file) Creates the specified file, whose contents will come from the InputStream.
private static void	mapExtensions(File workingDirectory, File docsDirectory, ExtensionMapping mapping)
private static void	unpack(File nar, File workingDirectory, byte[] hash) Unpacks the NAR to the specified directory.
private static void	unpackDocumentation(File jar, File docsDirectory, ExtensionMapping extensionMapping)
private static File	unpackNar(File nar, File baseWorkingDirectory) Unpacks the specified nar into the specified base working directory.
static ExtensionMapping	unpackNars(NiFiProperties props)

Methods inherited from class java.lang.Object

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

Field Detail

logger

private static final org.slf4j.Logger logger

HASH_FILENAME

private static String HASH_FILENAME

NAR_FILTER

private static final FileFilter NAR_FILTER

Constructor Detail

NarUnpacker

private NarUnpacker()

Method Detail

unpackNars

public static ExtensionMapping unpackNars(NiFiProperties props)

mapExtensions

private static void mapExtensions(File workingDirectory,
                 File docsDirectory,
                 ExtensionMapping mapping)
                           throws IOException

Throws:

IOException

unpackNar

private static File unpackNar(File nar,
             File baseWorkingDirectory)
                       throws IOException

Unpacks the specified nar into the specified base working directory.

Parameters:

nar - the nar to unpack

baseWorkingDirectory - the directory to unpack to

Returns:

the directory to the unpacked NAR

Throws:

IOException - if unable to explode nar

unpack

private static void unpack(File nar,
          File workingDirectory,
          byte[] hash)
                    throws IOException

Unpacks the NAR to the specified directory. Creates a checksum file that used to determine if future expansion is necessary.

Parameters:

workingDirectory - the root directory to which the NAR should be unpacked.

Throws:

IOException - if the NAR could not be unpacked.

unpackDocumentation

private static void unpackDocumentation(File jar,
                       File docsDirectory,
                       ExtensionMapping extensionMapping)
                                 throws IOException

Throws:

IOException

determineDocumentedNiFiComponents

private static void determineDocumentedNiFiComponents(File jar,
                                     ExtensionMapping extensionMapping)
                                               throws IOException

Throws:

IOException

determineDocumentedNiFiComponents

private static List<String> determineDocumentedNiFiComponents(JarFile jarFile,
                                             JarEntry jarEntry)
                                                       throws IOException

Throws:

IOException

makeFile

private static void makeFile(InputStream inputStream,
            File file)
                      throws IOException

Creates the specified file, whose contents will come from the InputStream.

Parameters:

inputStream - the contents of the file to create.

file - the file to create.

Throws:

IOException - if the file could not be created.

calculateMd5sum

private static byte[] calculateMd5sum(File file)
                               throws IOException

Calculates an md5 sum of the specified file.

Parameters:

file - to calculate the md5sum of

Returns:

the md5sum bytes

Throws:

IOException - if cannot read file