Package org.glassfish.tyrus.core

Class ComponentProviderService

java.lang.Object

org.glassfish.tyrus.core.ComponentProviderService

public class ComponentProviderService
extends java.lang.Object

Provides an instance of component. Searches for registered ComponentProviders which are used to provide instances.

Author:

Martin Matula (martin.matula at oracle.com), Stepan Kopriva (stepan.kopriva at oracle.com), Pavel Bucek (pavel.bucek at oracle.com)

Constructor Summary

Constructors

Constructor	Description
ComponentProviderService(ComponentProviderService componentProviderService)	Copy constructor.

Method Summary

Modifier and Type	Method	Description
static ComponentProviderService	create()	Create new instance of ComponentProviderService.
static ComponentProviderService	createClient()	Create new instance of ComponentProviderService.
<T> java.lang.Object	getCoderInstance(java.lang.Class<T> c, Session session, EndpointConfig endpointConfig, ErrorCollector collector)	Provide an instance of Encoder or Decoder descendant which is coupled to Session.
<T> java.lang.Object	getEndpointInstance(java.lang.Class<T> endpointClass)	This method is called by the container each time a new client connects to the logical endpoint this configurator configures.
<T> java.lang.Object	getInstance(java.lang.Class<T> c, Session session, ErrorCollector collector)	Provide an instance of class which is coupled to Session.
java.lang.reflect.Method	getInvocableMethod(java.lang.reflect.Method method)
void	removeSession(Session session)	Remove Session from cache.

Methods inherited from class java.lang.Object

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

Constructor Detail

ComponentProviderService

public ComponentProviderService(ComponentProviderService componentProviderService)

Copy constructor.

Parameters:

componentProviderService - original instance.

Method Detail

create

public static ComponentProviderService create()

Create new instance of ComponentProviderService.

Searches for registered ComponentProviders and registers them with this service.

DefaultComponentProvider is always added to found providers.

Returns:

initialized ComponentProviderService.

createClient

public static ComponentProviderService createClient()

Create new instance of ComponentProviderService.

Contains *only* DefaultComponentProvider. Used for creating client instances (CDI/EJB container are often confused and using them to retrieve instances leads to unstable results since the injection scope is not properly defined for these cases). See https://java.net/jira/browse/WEBSOCKET_SPEC-197 and https://java.net/jira/browse/WEBSOCKET_SPEC-196.

Returns:

initialized ComponentProviderService.

getInstance

public <T> java.lang.Object getInstance(java.lang.Class<T> c,
                                        Session session,
                                        ErrorCollector collector)

Provide an instance of class which is coupled to Session.

The first time the method is called the provider creates an instance and caches it. Next time the method is called the cached instance is returned.

Type Parameters:

T - type of the provided instance.

Parameters:

c - Class whose instance will be provided.

session - session to which the instance belongs (think of this as a scope).

collector - error collector.

Returns:

instance

getCoderInstance

public <T> java.lang.Object getCoderInstance(java.lang.Class<T> c,
                                             Session session,
                                             EndpointConfig endpointConfig,
                                             ErrorCollector collector)

Provide an instance of Encoder or Decoder descendant which is coupled to Session.

The first time the method is called the provider creates an instance, calls Encoder.init(javax.websocket.EndpointConfig) or Decoder.init(javax.websocket.EndpointConfig) and caches it. Next time the method is called the cached instance is returned.

Type Parameters:

T - type of the provided instance.

Parameters:

c - Class whose instance will be provided.

session - session to which the instance belongs (think of this as a scope).

collector - error collector.

endpointConfig - configuration corresponding to current context. Used for Encoder.init(javax.websocket.EndpointConfig) and Decoder.init(javax.websocket.EndpointConfig)

Returns:

instance

getInvocableMethod

public java.lang.reflect.Method getInvocableMethod(java.lang.reflect.Method method)

removeSession

public void removeSession(Session session)

Remove Session from cache.

Parameters:

session - to be removed.

getEndpointInstance

public <T> java.lang.Object getEndpointInstance(java.lang.Class<T> endpointClass)
                                         throws java.lang.InstantiationException

This method is called by the container each time a new client connects to the logical endpoint this configurator configures. Developers may override this method to control instantiation of endpoint instances in order to customize the initialization of the endpoint instance, or manage them in some other way. If the developer overrides this method, services like dependency injection that are otherwise supported, for example, when the implementation is part of the Java EE platform may not be available. The platform default implementation of this method returns a new endpoint instance per call, thereby ensuring that there is one endpoint instance per client, the default deployment cardinality.

Type Parameters:

T - the type of the endpoint.

Parameters:

endpointClass - the class of the endpoint.

Returns:

an instance of the endpoint that will handle all interactions from a new client.

Throws:

java.lang.InstantiationException - if there was an error producing the endpoint instance.

See Also:

ServerEndpointConfig.Configurator.getEndpointInstance(Class)