Module org.elasticsearch.server

Package org.elasticsearch.plugins

Class PluginsUtils

java.lang.Object

org.elasticsearch.plugins.PluginsUtils

public class PluginsUtils
extends Object

Utility methods for loading plugin information from disk and for sorting lists of plugins

Method Summary

Modifier and Type	Method	Description
static void	checkForFailedPluginRemovals(Path pluginsDirectory)	Check for the existence of a marker file that indicates any plugins are in a garbage state from a failed attempt to remove the plugin.
static List<Path>	findPluginDirs(Path rootPath)	Extracts all installed plugin directories from the provided rootPath.
static Map<String,List<String>>	getDependencyMapView(Path pluginsDirectory)	A convenience method for analyzing plugin dependencies
static void	preInstallJarHellCheck(PluginDescriptor candidateInfo, Path candidateDir, Path pluginsDir, Path modulesDir, Set<URL> classpath)	Given a plugin that we would like to install, perform a series of "jar hell checks to make sure that we don't have any classname conflicts.
static void	verifyCompatibility(PluginDescriptor info)	Verify the given plugin is compatible with the current Elasticsearch installation.

Methods inherited from class java.lang.Object

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

Method Details

findPluginDirs

public static List<Path> findPluginDirs(Path rootPath)
                                 throws IOException

Extracts all installed plugin directories from the provided rootPath.

Parameters:

rootPath - the path where the plugins are installed

Returns:

a list of all plugin paths installed in the rootPath

Throws:

IOException - if an I/O exception occurred reading the directories

verifyCompatibility

public static void verifyCompatibility(PluginDescriptor info)

Verify the given plugin is compatible with the current Elasticsearch installation.

checkForFailedPluginRemovals

public static void checkForFailedPluginRemovals(Path pluginsDirectory)
                                         throws IOException

Check for the existence of a marker file that indicates any plugins are in a garbage state from a failed attempt to remove the plugin.

Parameters:

pluginsDirectory - Path to plugins directory

Throws:

IOException - if there is an error reading from the filesystem

getDependencyMapView

public static Map<String,List<String>> getDependencyMapView(Path pluginsDirectory)
                                                     throws IOException

A convenience method for analyzing plugin dependencies

Parameters:

pluginsDirectory - Directory of plugins to scan

Returns:

a map of plugin names to a list of names of any plugins that they extend

Throws:

IOException - if there is an error reading the plugins

preInstallJarHellCheck

public static void preInstallJarHellCheck(PluginDescriptor candidateInfo,
 Path candidateDir,
 Path pluginsDir,
 Path modulesDir,
 Set<URL> classpath)
                                   throws IOException

Given a plugin that we would like to install, perform a series of "jar hell checks to make sure that we don't have any classname conflicts. Some of these checks are unique to the "pre-installation" scenario, but we also call the checkBundleJarHell(Set, PluginBundle, Map).

Parameters:

candidateInfo - Candidate for installation

candidateDir - Directory containing the candidate plugin files

pluginsDir - Directory containing already-installed plugins

modulesDir - Directory containing Elasticsearch modules

classpath - Set of URLs to use for a classpath

Throws:

IOException - on failed plugin reads