org.apache.hadoop.hbase.util

Class ClassLoaderTestHelper

java.lang.Object

org.apache.hadoop.hbase.util.ClassLoaderTestHelper

public final class ClassLoaderTestHelper
extends Object

Some utilities to help class loader testing

Field Summary

Fields

Modifier and Type	Field and Description
private static int	BUFFER_SIZE
private static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Modifier	Constructor and Description
private	ClassLoaderTestHelper()

Method Summary

Modifier and Type	Method and Description
static void	addJarFilesToJar(File targetJar, String libPrefix, File... srcJars) Add a list of jar files to another jar file under a specific folder.
static File	buildJar(String testDir, String className, String code) Create a test jar for testing purpose for a given class name with specified code string: save the class to a file, compile it, and jar it up.
static File	buildJar(String testDir, String className, String code, String folder) Create a test jar for testing purpose for a given class name with specified code string.
private static boolean	createJarArchive(File archiveFile, File[] tobeJared) Jar a list of files into a jar archive.
(package private) static String	localDirPath(org.apache.hadoop.conf.Configuration conf)

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final org.slf4j.Logger LOG

BUFFER_SIZE

private static final int BUFFER_SIZE

See Also:

Constant Field Values

Constructor Detail

ClassLoaderTestHelper

private ClassLoaderTestHelper()

Method Detail

createJarArchive

private static boolean createJarArchive(File archiveFile,
                                        File[] tobeJared)

Jar a list of files into a jar archive.

Parameters:

archiveFile - the target jar archive

tobeJared - a list of files to be jared

Returns:

true if a jar archive is build, false otherwise

buildJar

public static File buildJar(String testDir,
                            String className,
                            String code)
                     throws Exception

Create a test jar for testing purpose for a given class name with specified code string: save the class to a file, compile it, and jar it up. If the code string passed in is null, a bare empty class will be created and used.

Parameters:

testDir - the folder under which to store the test class and jar

className - the test class name

code - the optional test class code, which can be null. If null, a bare empty class will be used

Returns:

the test jar file generated

Throws:

Exception

buildJar

public static File buildJar(String testDir,
                            String className,
                            String code,
                            String folder)
                     throws Exception

Create a test jar for testing purpose for a given class name with specified code string.

Parameters:

testDir - the folder under which to store the test class

className - the test class name

code - the optional test class code, which can be null. If null, an empty class will be used

folder - the folder under which to store the generated jar

Returns:

the test jar file generated

Throws:

Exception

addJarFilesToJar

public static void addJarFilesToJar(File targetJar,
                                    String libPrefix,
                                    File... srcJars)
                             throws Exception

Add a list of jar files to another jar file under a specific folder. It is used to generated coprocessor jar files which can be loaded by the coprocessor class loader. It is for testing usage only so we don't be so careful about stream closing in case any exception.

Parameters:

targetJar - the target jar file

libPrefix - the folder where to put inner jar files

srcJars - the source inner jar files to be added

Throws:

Exception - if anything doesn't work as expected

localDirPath

static String localDirPath(org.apache.hadoop.conf.Configuration conf)