org.elasticsearch.bootstrap

Class JarHell

java.lang.Object

org.elasticsearch.bootstrap.JarHell

public class JarHell
extends java.lang.Object

Simple check for duplicate class files across the classpath.

This class checks for incompatibilities in the following ways:

• Checks that class files are not duplicated across jars.
• Checks any X-Compile-Target-JDK value in the jar manifest is compatible with current JRE
• Checks any X-Compile-Elasticsearch-Version value in the jar manifest is compatible with the current ES

Method Summary

Methods

Modifier and Type	Method and Description
static void	checkJarHell() Checks the current classpath for duplicate classes
static void	checkJarHell(java.net.URL[] urls) Checks the set of URLs for duplicate classes
static void	checkJavaVersion(java.lang.String resource, java.lang.String targetVersion) Checks that the java specification version targetVersion required by resource is compatible with the current installation.
static void	checkVersionFormat(java.lang.String targetVersion)
static void	main(java.lang.String[] args) Simple driver class, can be used eg.
static java.net.URL[]	parseClassPath() Parses the classpath into an array of URLs

Methods inherited from class java.lang.Object

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

Method Detail

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Simple driver class, can be used eg. from builds. Returns non-zero on jar-hell

Throws:

java.lang.Exception

checkJarHell

public static void checkJarHell()
                         throws java.lang.Exception

Checks the current classpath for duplicate classes

Throws:

java.lang.IllegalStateException - if jar hell was found

java.lang.Exception

parseClassPath

public static java.net.URL[] parseClassPath()

Parses the classpath into an array of URLs

Returns:

array of URLs

Throws:

java.lang.IllegalStateException - if the classpath contains empty elements

checkJarHell

public static void checkJarHell(java.net.URL[] urls)
                         throws java.lang.Exception

Checks the set of URLs for duplicate classes

Throws:

java.lang.IllegalStateException - if jar hell was found

java.lang.Exception

checkVersionFormat

public static void checkVersionFormat(java.lang.String targetVersion)

checkJavaVersion

public static void checkJavaVersion(java.lang.String resource,
                    java.lang.String targetVersion)

Checks that the java specification version targetVersion required by resource is compatible with the current installation.