com.atlassian.plugin
Class DefaultPluginManager

java.lang.Object
  com.atlassian.plugin.DefaultPluginManager

All Implemented Interfaces:

PluginAccessor, PluginController, PluginManager

public class DefaultPluginManager
extends java.lang.Object
implements PluginManager

This implementation delegates the initiation and classloading of plugins to a list of PluginLoaders and records the state of plugins in a PluginStateStore.

This class is responsible for enabling and disabling plugins and plugin modules and reflecting these state changes in the PluginStateStore.

An interesting quirk in the design is that installPlugin(PluginArtifact) explicitly stores the plugin via a PluginInstaller, whereas uninstall(Plugin) relies on the underlying PluginLoader to remove the plugin if necessary.

Field Summary

Fields inherited from interface com.atlassian.plugin.PluginManager

PLUGIN_DESCRIPTOR_FILENAME

Constructor Summary

DefaultPluginManager(PluginStateStore store, java.util.List<PluginLoader> pluginLoaders, ModuleDescriptorFactory moduleDescriptorFactory, PluginEventManager pluginEventManager)

Method Summary

protected void	addPlugin(PluginLoader loader, Plugin plugin) Deprecated. Since 2.0.2, use #addPlugins(PluginLoader,Collection...) instead
protected void	addPlugins(PluginLoader loader, java.util.Collection<Plugin> pluginsToAdd) Update the local plugin state and enable state aware modules.
void	disablePlugin(java.lang.String key) Disable a plugin by key.
void	disablePluginModule(java.lang.String completeKey) Disable a plugin module by key.
protected void	disablePluginModuleState(ModuleDescriptor module, PluginStateStore stateStore)
protected void	disablePluginState(Plugin plugin, PluginStateStore stateStore)
void	enablePlugin(java.lang.String key) Enable a plugin by key.
void	enablePluginModule(java.lang.String completeKey) Enable a plugin module by key.
protected void	enablePluginModuleState(ModuleDescriptor module, PluginStateStore stateStore)
protected void	enablePluginState(Plugin plugin, PluginStateStore stateStore)
java.lang.ClassLoader	getClassLoader() Retrieve the class loader responsible for loading classes and resources from plugins.
java.lang.Class	getDynamicPluginClass(java.lang.String className) Retrieve a class from a currently loaded (and active) dynamically loaded plugin.
java.io.InputStream	getDynamicResourceAsStream(java.lang.String name) Retrieve a resource from a currently loaded (and active) dynamically loaded plugin.
<T extends ModuleDescriptor> java.util.List<T>	getEnabledModuleDescriptorsByClass(java.lang.Class<T> moduleDescriptorClass) Get all enabled module descriptors that have a specific descriptor class.
<T extends ModuleDescriptor> java.util.List<T>	getEnabledModuleDescriptorsByClass(java.lang.Class<T> moduleDescriptorClass, boolean verbose) This method has been reverted to pre PLUG-40 to fix performance issues that were encountered during load testing.
java.util.List<ModuleDescriptor<?>>	getEnabledModuleDescriptorsByType(java.lang.String type) Deprecated. since 0.17, use getModuleDescriptors(com.atlassian.plugin.predicate.ModuleDescriptorPredicate) with an appropriate predicate instead.
<T> java.util.List<T>	getEnabledModulesByClass(java.lang.Class<T> moduleClass) Retrieve all plugin modules that implement or extend a specific class.
<T> java.util.List<T>	getEnabledModulesByClassAndDescriptor(java.lang.Class<ModuleDescriptor<T>>[] descriptorClasses, java.lang.Class<T> moduleClass) Deprecated. since 0.17, use getModules(com.atlassian.plugin.predicate.ModuleDescriptorPredicate) with an appropriate predicate instead.
<T> java.util.List<T>	getEnabledModulesByClassAndDescriptor(java.lang.Class<ModuleDescriptor<T>> descriptorClass, java.lang.Class<T> moduleClass) Deprecated. since 0.17, use getModules(com.atlassian.plugin.predicate.ModuleDescriptorPredicate) with an appropriate predicate instead.
Plugin	getEnabledPlugin(java.lang.String pluginKey) Retrieve a given plugin if it is enabled.
ModuleDescriptor	getEnabledPluginModule(java.lang.String completeKey) Retrieve an enabled plugin module by complete module key.
java.util.Collection<Plugin>	getEnabledPlugins() Get all of the currently enabled plugins.
protected java.util.List<java.lang.String>	getEnabledStateAwareModuleKeys(Plugin plugin)
<T> java.util.Collection<ModuleDescriptor<T>>	getModuleDescriptors(ModuleDescriptorPredicate<T> moduleDescriptorPredicate) Gets all module descriptors of installed modules that match the given predicate.
<T> java.util.Collection<T>	getModules(ModuleDescriptorPredicate<T> moduleDescriptorPredicate) Gets all installed modules that match the given predicate.
Plugin	getPlugin(java.lang.String key) Retrieve a given plugin (whether enabled or not).
ModuleDescriptor	getPluginModule(java.lang.String completeKey) Retrieve any plugin module by complete module key.
java.io.InputStream	getPluginResourceAsStream(java.lang.String pluginKey, java.lang.String resourcePath) Retrieve a resource from a currently loaded (and active) plugin.
java.util.Collection<Plugin>	getPlugins() Gets all of the currently installed plugins.
java.util.Collection<Plugin>	getPlugins(PluginPredicate pluginPredicate) Gets all installed plugins that match the given predicate.
protected PluginManagerState	getState()
protected PluginStateStore	getStore()
void	init() Initialize all plugins in all loaders
java.lang.String	installPlugin(PluginArtifact pluginArtifact) Installs a plugin and returns the plugin key
boolean	isPluginEnabled(java.lang.String key) This method checks to see if the plugin should be enabled based on the state manager and the plugin.
boolean	isPluginModuleEnabled(java.lang.String completeKey) Whether or not a given plugin module is currently enabled.
boolean	isSystemPlugin(java.lang.String key)
protected void	notifyModuleDisabled(ModuleDescriptor module)
protected void	notifyModuleEnabled(ModuleDescriptor module)
protected void	notifyPluginDisabled(Plugin plugin)
protected void	notifyPluginEnabled(Plugin plugin) Called on all clustered application nodes, rather than enablePlugin(String) to just update the local state, state aware modules and loaders, but not affect the global plugin state.
protected void	notifyUninstallPlugin(Plugin plugin)
protected void	removeStateFromStore(PluginStateStore stateStore, Plugin plugin)
int	scanForNewPlugins() Search all loaders and add any new plugins you find.
void	setDescriptorParserFactory(DescriptorParserFactory descriptorParserFactory) Deprecated. Since 2.0.0.beta2
void	setPluginInstaller(PluginInstaller pluginInstaller) Set the plugin installation strategy for this manager
void	shutdown() Fires the shutdown event
void	uninstall(Plugin plugin) Uninstall the plugin, disabling it first.
protected void	unloadPlugin(Plugin plugin) Unload a plugin.
protected void	updatePlugin(Plugin oldPlugin, Plugin newPlugin) Replace an already loaded plugin with another version.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultPluginManager

public DefaultPluginManager(PluginStateStore store,
                            java.util.List<PluginLoader> pluginLoaders,
                            ModuleDescriptorFactory moduleDescriptorFactory,
                            PluginEventManager pluginEventManager)

Method Detail

init

public void init()
          throws PluginParseException

Initialize all plugins in all loaders

Specified by:

init in interface PluginManager

Throws:

PluginParseException

shutdown

public void shutdown()

Fires the shutdown event

Specified by:

shutdown in interface PluginManager

Since:

2.0.0

setPluginInstaller

public void setPluginInstaller(PluginInstaller pluginInstaller)

Set the plugin installation strategy for this manager

Parameters:

pluginInstaller - the plugin installation strategy to use

See Also:

PluginInstaller

getStore

protected final PluginStateStore getStore()

installPlugin

public java.lang.String installPlugin(PluginArtifact pluginArtifact)
                               throws PluginParseException

Description copied from interface: PluginController

Installs a plugin and returns the plugin key

Specified by:

installPlugin in interface PluginController

Throws:

PluginParseException - if the plugin is not a valid plugin

scanForNewPlugins

public int scanForNewPlugins()
                      throws PluginParseException

Description copied from interface: PluginController

Search all loaders and add any new plugins you find.

Specified by:

scanForNewPlugins in interface PluginController

Returns:

The number of new plugins found.

Throws:

PluginParseException

uninstall

public void uninstall(Plugin plugin)
               throws PluginException

Description copied from interface: PluginController

Uninstall the plugin, disabling it first.

Specified by:

uninstall in interface PluginController

Throws:

PluginException - if there was some problem uninstalling the plugin.

removeStateFromStore

protected void removeStateFromStore(PluginStateStore stateStore,
                                    Plugin plugin)

unloadPlugin

protected void unloadPlugin(Plugin plugin)
                     throws PluginException

Unload a plugin. Called when plugins are added locally, or remotely in a clustered application.

Parameters:

plugin - the plugin to remove

Throws:

PluginException - if th eplugin cannot be uninstalled

notifyUninstallPlugin

protected void notifyUninstallPlugin(Plugin plugin)

getState

protected PluginManagerState getState()

addPlugin

protected void addPlugin(PluginLoader loader,
                         Plugin plugin)
                  throws PluginParseException

Deprecated. Since 2.0.2, use #addPlugins(PluginLoader,Collection...) instead

Throws:

PluginParseException

addPlugins

protected void addPlugins(PluginLoader loader,
                          java.util.Collection<Plugin> pluginsToAdd)
                   throws PluginParseException

Update the local plugin state and enable state aware modules.

If there is an existing plugin with the same key, the version strings of the existing plugin and the plugin provided to this method will be parsed and compared. If the installed version is newer than the provided version, it will not be changed. If the specified plugin's version is the same or newer, the existing plugin state will be saved and the plugin will be unloaded before the provided plugin is installed. If the existing plugin cannot be unloaded a PluginException will be thrown.

Parameters:

loader - the loader used to load this plugin

pluginsToAdd - the plugins to add

Throws:

PluginParseException - if the plugin cannot be parsed

Since:

2.0.2

updatePlugin

protected void updatePlugin(Plugin oldPlugin,
                            Plugin newPlugin)
                     throws PluginException

Replace an already loaded plugin with another version. Relevant stored configuration for the plugin will be preserved.

Parameters:

oldPlugin - Plugin to replace

newPlugin - New plugin to install

Throws:

PluginException - if the plugin cannot be updated

getPlugins

public java.util.Collection<Plugin> getPlugins()

Description copied from interface: PluginAccessor

Gets all of the currently installed plugins.

Specified by:

getPlugins in interface PluginAccessor

Returns:

a collection of installed Plugins.

getPlugins

public java.util.Collection<Plugin> getPlugins(PluginPredicate pluginPredicate)

Description copied from interface: PluginAccessor

Gets all installed plugins that match the given predicate.

Specified by:

getPlugins in interface PluginAccessor

Parameters:

pluginPredicate - the PluginPredicate to match.

Returns:

a collection of Plugins that match the given predicate.

Since:

0.17

See Also:

PluginAccessor.getPlugins(PluginPredicate)

getEnabledPlugins

public java.util.Collection<Plugin> getEnabledPlugins()

Description copied from interface: PluginAccessor

Get all of the currently enabled plugins.

Specified by:

getEnabledPlugins in interface PluginAccessor

Returns:

a collection of installed and enabled Plugins.

See Also:

PluginAccessor.getEnabledPlugins()

getModules

public <T> java.util.Collection<T> getModules(ModuleDescriptorPredicate<T> moduleDescriptorPredicate)

Description copied from interface: PluginAccessor

Gets all installed modules that match the given predicate.

Specified by:

getModules in interface PluginAccessor

Parameters:

moduleDescriptorPredicate - the ModuleDescriptorPredicate to match.

Returns:

a collection of modules as per ModuleDescriptor.getModule() that match the given predicate.

Since:

0.17

See Also:

PluginAccessor.getModules(com.atlassian.plugin.predicate.ModuleDescriptorPredicate)

getModuleDescriptors

public <T> java.util.Collection<ModuleDescriptor<T>> getModuleDescriptors(ModuleDescriptorPredicate<T> moduleDescriptorPredicate)

Description copied from interface: PluginAccessor

Gets all module descriptors of installed modules that match the given predicate.

Specified by:

getModuleDescriptors in interface PluginAccessor

Parameters:

moduleDescriptorPredicate - the ModuleDescriptorPredicate to match.

Returns:

a collection of ModuleDescriptors that match the given predicate.

Since:

0.17

See Also:

PluginAccessor.getModuleDescriptors(com.atlassian.plugin.predicate.ModuleDescriptorPredicate)

getPlugin

public Plugin getPlugin(java.lang.String key)

Description copied from interface: PluginAccessor

Retrieve a given plugin (whether enabled or not).

Specified by:

getPlugin in interface PluginAccessor

Returns:

The enabled plugin, or null if that plugin does not exist.

getEnabledPlugin

public Plugin getEnabledPlugin(java.lang.String pluginKey)

Description copied from interface: PluginAccessor

Retrieve a given plugin if it is enabled.

Specified by:

getEnabledPlugin in interface PluginAccessor

Returns:

The enabled plugin, or null if that plugin does not exist or is disabled.

getPluginModule

public ModuleDescriptor getPluginModule(java.lang.String completeKey)

Description copied from interface: PluginAccessor

Retrieve any plugin module by complete module key.

Note: the module may or may not be disabled.

Specified by:

getPluginModule in interface PluginAccessor

getEnabledPluginModule

public ModuleDescriptor getEnabledPluginModule(java.lang.String completeKey)

Description copied from interface: PluginAccessor

Retrieve an enabled plugin module by complete module key.

Specified by:

getEnabledPluginModule in interface PluginAccessor

getEnabledModulesByClass

public <T> java.util.List<T> getEnabledModulesByClass(java.lang.Class<T> moduleClass)

Description copied from interface: PluginAccessor

Retrieve all plugin modules that implement or extend a specific class.

Specified by:

getEnabledModulesByClass in interface PluginAccessor

Returns:

List of modules that implement or extend the given class.

See Also:

PluginAccessor.getEnabledModulesByClass(Class)

getEnabledModulesByClassAndDescriptor

public <T> java.util.List<T> getEnabledModulesByClassAndDescriptor(java.lang.Class<ModuleDescriptor<T>>[] descriptorClasses,
                                                                   java.lang.Class<T> moduleClass)

Deprecated. since 0.17, use getModules(com.atlassian.plugin.predicate.ModuleDescriptorPredicate) with an appropriate predicate instead.

Description copied from interface: PluginAccessor

Retrieve all plugin modules that implement or extend a specific class, and has a descriptor class as one of descriptorClazz

Specified by:

getEnabledModulesByClassAndDescriptor in interface PluginAccessor

Parameters:

descriptorClasses - @NotNull

moduleClass - @NotNull

Returns:

List of modules that implement or extend the given class. Empty list if none found

See Also:

PluginAccessor.getEnabledModulesByClassAndDescriptor(Class[], Class)

getEnabledModulesByClassAndDescriptor

public <T> java.util.List<T> getEnabledModulesByClassAndDescriptor(java.lang.Class<ModuleDescriptor<T>> descriptorClass,
                                                                   java.lang.Class<T> moduleClass)

Deprecated. since 0.17, use getModules(com.atlassian.plugin.predicate.ModuleDescriptorPredicate) with an appropriate predicate instead.

Description copied from interface: PluginAccessor

Retrieve all plugin modules that implement or extend a specific class, and has a descriptor class as the descriptorClazz

Specified by:

getEnabledModulesByClassAndDescriptor in interface PluginAccessor

Parameters:

descriptorClass - @NotNull

moduleClass - @NotNull

Returns:

List of modules that implement or extend the given class. Empty list if none found

See Also:

PluginAccessor.getEnabledModulesByClassAndDescriptor(Class, Class)

getEnabledModuleDescriptorsByClass

public <T extends ModuleDescriptor> java.util.List<T> getEnabledModuleDescriptorsByClass(java.lang.Class<T> moduleDescriptorClass)

Description copied from interface: PluginAccessor

Get all enabled module descriptors that have a specific descriptor class.

Specified by:

getEnabledModuleDescriptorsByClass in interface PluginAccessor

Parameters:

moduleDescriptorClass - module descriptor class

Returns:

List of ModuleDescriptors that implement or extend the given class.

getEnabledModuleDescriptorsByClass

public <T extends ModuleDescriptor> java.util.List<T> getEnabledModuleDescriptorsByClass(java.lang.Class<T> moduleDescriptorClass,
                                                                                         boolean verbose)

This method has been reverted to pre PLUG-40 to fix performance issues that were encountered during load testing. This should be reverted to the state it was in at 54639 when the fundamental issue leading to this slowdown has been corrected (that is, slowness of PluginClassLoader).

Specified by:

getEnabledModuleDescriptorsByClass in interface PluginAccessor

Parameters:

moduleDescriptorClass - module descriptor class

verbose - log verbose messages flag

Returns:

List of ModuleDescriptors that implement or extend the given class.

See Also:

PluginAccessor.getEnabledModuleDescriptorsByClass(Class)

getEnabledModuleDescriptorsByType

public java.util.List<ModuleDescriptor<?>> getEnabledModuleDescriptorsByType(java.lang.String type)
                                                                      throws PluginParseException,
                                                                             java.lang.IllegalArgumentException

Deprecated. since 0.17, use getModuleDescriptors(com.atlassian.plugin.predicate.ModuleDescriptorPredicate) with an appropriate predicate instead.

Description copied from interface: PluginAccessor

Get all enabled module descriptors that have a specific descriptor type.

Specified by:

getEnabledModuleDescriptorsByType in interface PluginAccessor

Returns:

List of ModuleDescriptors that are of a given type.

Throws:

PluginParseException

java.lang.IllegalArgumentException

See Also:

PluginAccessor.getEnabledModuleDescriptorsByType(String)

enablePlugin

public void enablePlugin(java.lang.String key)

Description copied from interface: PluginController

Enable a plugin by key.

Specified by:

enablePlugin in interface PluginController

enablePluginState

protected void enablePluginState(Plugin plugin,
                                 PluginStateStore stateStore)

notifyPluginEnabled

protected void notifyPluginEnabled(Plugin plugin)

Called on all clustered application nodes, rather than enablePlugin(String) to just update the local state, state aware modules and loaders, but not affect the global plugin state.

Parameters:

plugin - the plugin being enabled

disablePlugin

public void disablePlugin(java.lang.String key)

Description copied from interface: PluginController

Disable a plugin by key.

Specified by:

disablePlugin in interface PluginController

disablePluginState

protected void disablePluginState(Plugin plugin,
                                  PluginStateStore stateStore)

getEnabledStateAwareModuleKeys

protected java.util.List<java.lang.String> getEnabledStateAwareModuleKeys(Plugin plugin)

notifyPluginDisabled

protected void notifyPluginDisabled(Plugin plugin)

disablePluginModule

public void disablePluginModule(java.lang.String completeKey)

Description copied from interface: PluginController

Disable a plugin module by key.

Specified by:

disablePluginModule in interface PluginController

disablePluginModuleState

protected void disablePluginModuleState(ModuleDescriptor module,
                                        PluginStateStore stateStore)

notifyModuleDisabled

protected void notifyModuleDisabled(ModuleDescriptor module)

enablePluginModule

public void enablePluginModule(java.lang.String completeKey)

Description copied from interface: PluginController

Enable a plugin module by key.

Specified by:

enablePluginModule in interface PluginController

enablePluginModuleState

protected void enablePluginModuleState(ModuleDescriptor module,
                                       PluginStateStore stateStore)

notifyModuleEnabled

protected void notifyModuleEnabled(ModuleDescriptor module)

isPluginModuleEnabled

public boolean isPluginModuleEnabled(java.lang.String completeKey)

Description copied from interface: PluginAccessor

Whether or not a given plugin module is currently enabled. This also checks if the plugin it is contained within is enabled also

Specified by:

isPluginModuleEnabled in interface PluginAccessor

See Also:

PluginAccessor.isPluginEnabled(String)

isPluginEnabled

public boolean isPluginEnabled(java.lang.String key)

This method checks to see if the plugin should be enabled based on the state manager and the plugin.

Specified by:

isPluginEnabled in interface PluginAccessor

Parameters:

key - The plugin key

Returns:

True if the plugin is enabled

getDynamicResourceAsStream

public java.io.InputStream getDynamicResourceAsStream(java.lang.String name)

Description copied from interface: PluginAccessor

Retrieve a resource from a currently loaded (and active) dynamically loaded plugin. Will return the first resource found, so plugins with overlapping resource names will behave eratically.

Specified by:

getDynamicResourceAsStream in interface PluginAccessor

Parameters:

name - the path to the resource to retrieve

Returns:

the dynamically loaded resource that matches that path, or null if no such resource is found

getDynamicPluginClass

public java.lang.Class getDynamicPluginClass(java.lang.String className)
                                      throws java.lang.ClassNotFoundException

Description copied from interface: PluginAccessor

Retrieve a class from a currently loaded (and active) dynamically loaded plugin. Will return the first class found, so plugins with overlapping class names will behave eratically.

Specified by:

getDynamicPluginClass in interface PluginAccessor

Parameters:

className - the name of the class to retrieve

Returns:

the dynamically loaded class that matches that name

Throws:

java.lang.ClassNotFoundException - thrown if no classes by that name could be found in any of the enabled dynamic plugins

getClassLoader

public java.lang.ClassLoader getClassLoader()

Description copied from interface: PluginAccessor

Retrieve the class loader responsible for loading classes and resources from plugins.

Specified by:

getClassLoader in interface PluginAccessor

Returns:

the class loader

getPluginResourceAsStream

public java.io.InputStream getPluginResourceAsStream(java.lang.String pluginKey,
                                                     java.lang.String resourcePath)

Description copied from interface: PluginAccessor

Retrieve a resource from a currently loaded (and active) plugin. For statically loaded plugins, this just means pulling the resource from the PluginManager's classloader. For dynamically loaded plugins, this means retrieving the resource from the plugin's private classloader.

Specified by:

getPluginResourceAsStream in interface PluginAccessor

isSystemPlugin

public boolean isSystemPlugin(java.lang.String key)

Specified by:

isSystemPlugin in interface PluginAccessor

Returns:

true if the plugin is a system plugin.

setDescriptorParserFactory

public void setDescriptorParserFactory(DescriptorParserFactory descriptorParserFactory)

Deprecated. Since 2.0.0.beta2