org.apache.tamaya.integration.cdi.internal

Class CDIAwareServiceContext

java.lang.Object

org.apache.tamaya.integration.cdi.internal.CDIAwareServiceContext

All Implemented Interfaces:

ServiceContext

public class CDIAwareServiceContext
extends Object
implements ServiceContext

This class implements a ServiceContext, which basically provides a similar loading mechanism as used by the ServiceLoader. Whereas the ServiceLoader only loads configurations and instances from one classloader, this loader manages configs found and the related instances for each classloader along the classloader hierarchies individually. It ensures instances are loaded on the classloader level, where they first are visible. Additionally it ensures the same configuration resource (and its declared services) are loaded multiple times, when going up the classloader hierarchy.

Finally classloaders are not stored by reference by this class, to ensure they still can be garbage collected. Refer also the inherited parent class for further details.

This class uses an ordinal of 10, so it overrides any default ServiceContext implementations provided with the Tamaya core modules.

Constructor Summary

Constructors

Constructor and Description
CDIAwareServiceContext()

Method Summary

Modifier and Type	Method and Description
static int	getPriority(Object o) Checks the given instance for a @Priority annotation.
<T> T	getService(Class<T> serviceType) Access a service singleton via its type.
<T> List<T>	getServices(Class<T> serviceType) Loads and registers services.
int	ordinal() Returns ordinal of 20, overriding defaults as well as the inherited (internally used) CLAwareServiceContext instance.

Methods inherited from class java.lang.Object

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

Constructor Detail

CDIAwareServiceContext

public CDIAwareServiceContext()

Method Detail

getService

public <T> T getService(Class<T> serviceType)

Description copied from interface: ServiceContext

Access a service singleton via its type. If multiple implementations for the very serviceType exist then the one with the highest Priority will be used.

Specified by:

getService in interface ServiceContext

Type Parameters:

T - the type of the service type.

Parameters:

serviceType - the service type.

Returns:

The instance to be used, or null

getServices

public <T> List<T> getServices(Class<T> serviceType)

Loads and registers services.

Specified by:

getServices in interface ServiceContext

Type Parameters:

T - the concrete type.

Parameters:

serviceType - The service type.

Returns:

the items found, never null.

getPriority

public static int getPriority(Object o)

Checks the given instance for a @Priority annotation. If present the annotation's value s evaluated. If no such annotation is present, a default priority is returned (1);

Parameters:

o - the instance, not null.

Returns:

a priority, by default 1.

ordinal

public int ordinal()

Returns ordinal of 20, overriding defaults as well as the inherited (internally used) CLAwareServiceContext instance.

Specified by:

ordinal in interface ServiceContext

Returns:

ordinal of 20.