org.exoplatform.container

Class ExoContainer

java.lang.Object

org.exoplatform.container.AbstractContainer

org.exoplatform.container.ExoContainer

All Implemented Interfaces:

Serializable, Container, Disposable, Startable

Direct Known Subclasses:

PortalContainer, RootContainer, StandaloneContainer

public class ExoContainer
extends AbstractContainer

Created by The eXo Platform SAS
The Exo Container is an object responsible for loading services/components. The eXoContainer class is inherited by all the containers, including RootContainer, PortalContainer, and StandaloneContainer. It itself inherits from a Container which allows eXo to apply the Inversion of Control (also known as IoC) principles.

Author:

Tuan Nguyen

See Also:

Serialized Form

eXo level API

Provisional

Field Summary

Fields

Modifier and Type	Field and Description
protected ExoContainerContext	context
protected static Log	LOG
protected ExoContainer	parent
protected AtomicBoolean	stopping

Fields inherited from class org.exoplatform.container.AbstractContainer

delegate

Constructor Summary

Constructors

Constructor and Description
ExoContainer()
ExoContainer(ExoContainer parent)

Method Summary

Modifier and Type	Method and Description
void	addComponentLifecylePlugin(ComponentLifecyclePlugin plugin)
void	addContainerLifecylePlugin(ContainerLifecyclePlugin plugin)
boolean	canBeDisposed() Indicates whether or not the container can be disposed
protected boolean	canBeInitialized() Indicates whether or not the container can be initialized
boolean	canBeStarted() Indicates whether or not the container can be started
boolean	canBeStopped() Indicates whether or not the container can be stopped
<T> T	createComponent(Class<T> clazz) Creates a component corresponding to the given Class with no parameters This is equivalent to call AbstractContainer.createComponent(Class, InitParams) with null as InitParams
void	dispose() Dispose this component.
ComponentAdapter<?>	getComponentAdapter(Object componentKey) Find a component adapter associated with the specified key.
<T> ComponentAdapter<T>	getComponentAdapter(Object componentKey, Class<T> bindType) This method is equivalent to getComponentAdapter(Object, Class, boolean) with true for the parameter autoRegistration
<T> ComponentAdapter<T>	getComponentAdapter(Object componentKey, Class<T> bindType, boolean autoRegistration) Find a component adapter associated with the specified key.
<T> ComponentAdapter<T>	getComponentAdapterOfType(Class<T> componentType) This method is equivalent to getComponentAdapterOfType(Class, boolean) with true for the parameter autoRegistration
<T> ComponentAdapter<T>	getComponentAdapterOfType(Class<T> componentType, boolean autoRegistration) Find a component adapter associated with the specified type.
Object	getComponentInstance(Object componentKey) Retrieve a component instance registered with a specific key.
<T> T	getComponentInstance(Object componentKey, Class<T> bindType) This method is equivalent to getComponentInstance(Object, Class, boolean) with true for the parameter autoRegistration
<T> T	getComponentInstance(Object componentKey, Class<T> bindType, boolean autoRegistration) Retrieve a component instance registered with a specific key.
<T> T	getComponentInstanceOfType(Class<T> componentType) This method is equivalent to getComponentInstanceOfType(Class, boolean) with true for the parameter autoRegistration
<T> T	getComponentInstanceOfType(Class<T> componentType, boolean autoRegistration) Find a component instance matching the specified type.
protected Configuration	getConfiguration() Gets the ConfigurationManager from the given ExoContainer if it exists, then returns the nested Configuration otherwise it returns null
ExoContainerContext	getContext()
ContextManager	getContextManager() Gives the ContextManager that has been registered
protected Collection<ExternalComponentPlugins>	getExternalComponentPluginsUnused() Gives all the ExternalComponentPlugins that have not been used, null if there are all used.
ExoContainer	getParent() Gives the parent container of this container.
static Set<String>	getProfiles() Returns an unmodifiable set of profiles defined by the value returned by invoking PropertyManager.getProperty(String) with the PropertyManager.RUNTIME_PROFILES property.
Set<String>	getRegisteredComponentNames()
static boolean	hasProfile(String profileName) Indicates whether or not a given profile exists
protected void	initContainerInternal()
void	initialize() Initializes the container
boolean	isContextManagerLoaded() Indicates whether or not the ContextManager has already been loaded
<T> ComponentAdapter<T>	registerComponentImplementation(Class<T> componentImplementation) Register a component using the componentImplementation as key.
<T> ComponentAdapter<T>	registerComponentInstance(T componentInstance) Register an arbitrary object.
void	start() Start this component.
void	start(boolean init) Starts the container
void	stop() Stop this component.
protected void	unregisterAllComponents() Unregister all components from container to avoid keeping instances in memory.

Methods inherited from class org.exoplatform.container.AbstractContainer

accept, createComponent, getComponentAdapters, getComponentAdaptersOfType, getComponentInstancesOfType, getManagementContext, getMBeanServer, getScopingObjectName, getSuccessor, registerComponentImplementation, registerComponentInstance, unregisterComponent

Methods inherited from class java.lang.Object

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

Field Detail

stopping

protected final AtomicBoolean stopping

LOG

protected static final Log LOG

context

protected final ExoContainerContext context

parent

protected final ExoContainer parent

Constructor Detail

ExoContainer

public ExoContainer()

ExoContainer

public ExoContainer(ExoContainer parent)

Method Detail

getProfiles

public static Set<String> getProfiles()

Returns an unmodifiable set of profiles defined by the value returned by invoking PropertyManager.getProperty(String) with the PropertyManager.RUNTIME_PROFILES property.

Returns:

the set of profiles

hasProfile

public static boolean hasProfile(String profileName)

Indicates whether or not a given profile exists

Parameters:

profileName - the name of the profile to check

Returns:

true if the profile exists, false otherwise.

getContext

public ExoContainerContext getContext()

initContainerInternal

protected void initContainerInternal()

dispose

public void dispose()

Description copied from class: AbstractContainer

Dispose this component. The component should deallocate all resources. The contract for this method defines a single call at the end of this component's life.

Specified by:

dispose in interface Disposable

Overrides:

dispose in class AbstractContainer

start

public void start(boolean init)

Starts the container

Parameters:

init - indicates if the container must be initialized first

initialize

public void initialize()

Description copied from class: AbstractContainer

Initializes the container

Specified by:

initialize in interface Container

Overrides:

initialize in class AbstractContainer

start

public void start()

Description copied from class: AbstractContainer

Start this component. Called initially at the begin of the lifecycle. It can be called again after a stop.

Specified by:

start in interface Startable

Overrides:

start in class AbstractContainer

stop

public void stop()

Description copied from class: AbstractContainer

Stop this component. Called near the end of the lifecycle. It can be called again after a further start. Implement Disposable if you need a single call at the definite end of the lifecycle.

Specified by:

stop in interface Startable

Overrides:

stop in class AbstractContainer

addComponentLifecylePlugin

public void addComponentLifecylePlugin(ComponentLifecyclePlugin plugin)

addContainerLifecylePlugin

public void addContainerLifecylePlugin(ContainerLifecyclePlugin plugin)

getConfiguration

protected Configuration getConfiguration()

Gets the ConfigurationManager from the given ExoContainer if it exists, then returns the nested Configuration otherwise it returns null

getExternalComponentPluginsUnused

protected Collection<ExternalComponentPlugins> getExternalComponentPluginsUnused()

Gives all the ExternalComponentPlugins that have not been used, null if there are all used.

unregisterAllComponents

protected void unregisterAllComponents()

Unregister all components from container to avoid keeping instances in memory.

registerComponentImplementation

public <T> ComponentAdapter<T> registerComponentImplementation(Class<T> componentImplementation)
                                                        throws ContainerException

Register a component using the componentImplementation as key. Calling this method is equivalent to calling registerComponentImplementation(componentImplementation, componentImplementation).

Parameters:

componentImplementation - the concrete component class.

Returns:

the ComponentAdapter that has been associated with this component. In the majority of cases, this return value can be safely ignored, as one of the getXXX() methods of the Container interface can be used to retrieve a reference to the component later on.

Throws:

ContainerException - if registration fails.

registerComponentInstance

public <T> ComponentAdapter<T> registerComponentInstance(T componentInstance)
                                                  throws ContainerException

Register an arbitrary object. The class of the object will be used as a key. Calling this method is equivalent to calling * registerComponentImplementation(componentImplementation, componentImplementation).

Parameters:

componentInstance - the instance of the component to register

Returns:

the ComponentAdapter that has been associated with this component. In the majority of cases, this return value can be safely ignored, as one of the getXXX() methods of the Container interface can be used to retrieve a reference to the component later on.

Throws:

ContainerException - if registration fails.

createComponent

public <T> T createComponent(Class<T> clazz)
                      throws Exception

Creates a component corresponding to the given Class with no parameters This is equivalent to call AbstractContainer.createComponent(Class, InitParams) with null as InitParams

Parameters:

clazz - the Class of the object to create

Returns:

an instance of the component

Throws:

Exception - if any issue occurs while creating the component.

getComponentAdapter

public ComponentAdapter<?> getComponentAdapter(Object componentKey)

Find a component adapter associated with the specified key. If a component adapter cannot be found in this container, the parent container (if one exists) will be searched.

Parameters:

componentKey - the key that the component was registered with.

Returns:

the component adapter associated with this key, or null if no component has been registered for the specified key.

getComponentInstance

public Object getComponentInstance(Object componentKey)

Retrieve a component instance registered with a specific key. If a component cannot be found in this container, the parent container (if one exists) will be searched.

Parameters:

componentKey - the key that the component was registered with.

Returns:

an instantiated component, or null if no component has been registered for the specified key.

getRegisteredComponentNames

public Set<String> getRegisteredComponentNames()
                                        throws ContainerException

Throws:

ContainerException

getParent

public ExoContainer getParent()

Gives the parent container of this container.

Returns:

a ExoContainer instance, or null if this container does not have a parent.

canBeStarted

public boolean canBeStarted()

Indicates whether or not the container can be started

Returns:

true if it can be started, false otherwise.

canBeStopped

public boolean canBeStopped()

Indicates whether or not the container can be stopped

Returns:

true if it can be stopped, false otherwise.

canBeDisposed

public boolean canBeDisposed()

Indicates whether or not the container can be disposed

Returns:

true if it can be disposed, false otherwise.

canBeInitialized

protected boolean canBeInitialized()

Indicates whether or not the container can be initialized

Returns:

true if it can be initialized, false otherwise.

getContextManager

public ContextManager getContextManager()

Gives the ContextManager that has been registered

Returns:

the ContextManager related to this container, null otherwise.

isContextManagerLoaded

public boolean isContextManagerLoaded()

Indicates whether or not the ContextManager has already been loaded

Returns:

true if the ContextManager has been loaded, false otherwise.

getComponentInstanceOfType

public <T> T getComponentInstanceOfType(Class<T> componentType)

This method is equivalent to getComponentInstanceOfType(Class, boolean) with true for the parameter autoRegistration

getComponentInstanceOfType

public <T> T getComponentInstanceOfType(Class<T> componentType,
                                        boolean autoRegistration)

Find a component instance matching the specified type. If none can be found it will try to auto register the component according to the content of the annotation DefinitionByType if the parameter autoRegistration has been set to true.

Specified by:

getComponentInstanceOfType in interface Container

Overrides:

getComponentInstanceOfType in class AbstractContainer

Parameters:

componentType - the type of the component.

autoRegistration - indicates whether the auto registration should be performed or not

Returns:

the adapter matching the class.

getComponentAdapterOfType

public <T> ComponentAdapter<T> getComponentAdapterOfType(Class<T> componentType)

This method is equivalent to getComponentAdapterOfType(Class, boolean) with true for the parameter autoRegistration

Parameters:

componentType - the type of the component.

Returns:

the component adapter associated with this class, or null if no component has been registered for the specified key.

getComponentAdapterOfType

public <T> ComponentAdapter<T> getComponentAdapterOfType(Class<T> componentType,
                                                         boolean autoRegistration)

Find a component adapter associated with the specified type. If a component adapter cannot be found in this container, the parent container (if one exists) will be searched. If none can be found it will try to auto register the component according to the content of the annotation DefinitionByType if the parameter autoRegistration has been set to true.

Specified by:

getComponentAdapterOfType in interface Container

Overrides:

getComponentAdapterOfType in class AbstractContainer

Parameters:

componentType - the type of the component.

autoRegistration - indicates whether the auto registration should be performed or not

Returns:

the component adapter associated with this class, or null if no component has been registered for the specified key.

getComponentInstance

public <T> T getComponentInstance(Object componentKey,
                                  Class<T> bindType)

This method is equivalent to getComponentInstance(Object, Class, boolean) with true for the parameter autoRegistration

Parameters:

componentKey - the key that the component was registered with.

bindType - the expected type of the instance if one can be found.

Returns:

an instantiated component, or null if no component has been registered for the specified key.

getComponentInstance

public <T> T getComponentInstance(Object componentKey,
                                  Class<T> bindType,
                                  boolean autoRegistration)

Retrieve a component instance registered with a specific key. If a component cannot be found in this container, the parent container (if one exists) will be searched. If none can be found and the parameter autoRegistration has been set to true, it will try to auto register the component according to the content of:

• The annotation DefinitionByType if the componentKey is a class
• The annotation DefinitionByName if the componentKey is a string
• The annotation DefinitionByQualifier if the componentKey is a qualifier

Specified by:

getComponentInstance in interface Container

Overrides:

getComponentInstance in class AbstractContainer

Parameters:

componentKey - the key that the component was registered with.

bindType - the expected type of the instance if one can be found.

autoRegistration - indicates whether the auto registration should be performed or not

Returns:

an instantiated component, or null if no component has been registered for the specified key.

getComponentAdapter

public <T> ComponentAdapter<T> getComponentAdapter(Object componentKey,
                                                   Class<T> bindType)

This method is equivalent to getComponentAdapter(Object, Class, boolean) with true for the parameter autoRegistration

Parameters:

componentKey - the key that the component was registered with.

bindType - the expected raw type of the adapter if one can be found.

Returns:

the component adapter associated with this key, or null if no component has been registered for the specified key.

getComponentAdapter

public <T> ComponentAdapter<T> getComponentAdapter(Object componentKey,
                                                   Class<T> bindType,
                                                   boolean autoRegistration)

Find a component adapter associated with the specified key. If a component adapter cannot be found in this container, the parent container (if one exists) will be searched. If none can be found and the parameter autoRegistration has been set to true, it will try to auto register the component according to the content of:

• The annotation DefinitionByType if the componentKey is a class
• The annotation DefinitionByName if the componentKey is a string
• The annotation DefinitionByQualifier if the componentKey is a qualifier

Specified by:

getComponentAdapter in interface Container

Overrides:

getComponentAdapter in class AbstractContainer

Parameters:

componentKey - the key that the component was registered with.

bindType - the expected raw type of the adapter if one can be found.

autoRegistration - indicates whether the auto registration should be performed or not

Returns:

the component adapter associated with this key, or null if no component has been registered for the specified key.