SCA annotations

Network Deployment (Distributed operating systems), v8.0 > Reference > Developer detailed usage information

SCA annotations

By using Java annotations that apply to Service Component Architecture (SCA), you can enable an existing Java EE component to be recognized as an SCA component and participate in an SCA composite.
The SCA programming model supports Java EE integration. As a result, you can take advantage of SCA annotations to enable the Java EE components, such as session beans, message driven beans, or web components to consume SCA services.
The target for annotations applies for these Java objects:

Types such as a Java class, enum or interface
Methods
Fields representing local instance variables within a Java class
Parameters within a Java method

Annotations supported by SCA are listed in the following table:
SCA annotations. The annotations enable Java EE components.
Annotation class Annotation Properties
org.osoa.sca.
annotations.
ComponentName.class
The @ComponentName annotation specifies the injection of a component name.

Annotation target: Method or field
There are no properties on the @ComponentName annotation.
org.osoa.sca.
annotations.
Context.class
The @Context annotation specifies to inject SCA context into a service component instance.
When you inject a composite context for the component, the type of context is defined by the type of the Java class field or type of the setter method input argument. Specify the type as either ComponentContext or RequestContext.

Annotation target: Method or field
There are no properties on the @Context annotation.
org.osoa.sca.
annotations.
Property.class
The @Property annotation specifies to inject configuration properties from service component configuration.
You can inject a simple Java type or a complex Java type. The type of the property injected is defined by the type of the Java class field or type of the setter method input argument.
We can use this annotation on protected or public fields, on setter methods, or on a constructor method.

Annotation target: Method or field
Properties:

- name

The name of the property. The default is the name of the field of the Java class. This property is optional. (String)

- required

Whether injection is required. The default value is false. This property is optional. (Boolean)
org.osoa.sca.
annotations.
Reference.class
The @Reference annotation specifies the injection of a service reference.
The interface of the service injected is defined by the type of the Java class field or the type of the setter method input parameter.

Annotation target: Method or field
Properties:

- name

The name of the property. The default is the name of the field of the Java class. This property is optional. (String)

- required

Whether injection is required. The default value is false. This property is optional. (Boolean)
Related

Service Component Architecture specifications and APIs

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Annotation class	Annotation	Properties
org.osoa.sca. annotations. ComponentName.class	The @ComponentName annotation specifies the injection of a component name.	Annotation target: Method or field There are no properties on the @ComponentName annotation.
org.osoa.sca. annotations. Context.class	The @Context annotation specifies to inject SCA context into a service component instance. When you inject a composite context for the component, the type of context is defined by the type of the Java class field or type of the setter method input argument. Specify the type as either ComponentContext or RequestContext.	Annotation target: Method or field There are no properties on the @Context annotation.
org.osoa.sca. annotations. Property.class	The @Property annotation specifies to inject configuration properties from service component configuration. You can inject a simple Java type or a complex Java type. The type of the property injected is defined by the type of the Java class field or type of the setter method input argument. We can use this annotation on protected or public fields, on setter methods, or on a constructor method.	Annotation target: Method or field Properties: - name The name of the property. The default is the name of the field of the Java class. This property is optional. (String) - required Whether injection is required. The default value is false. This property is optional. (Boolean)
org.osoa.sca. annotations. Reference.class	The @Reference annotation specifies the injection of a service reference. The interface of the service injected is defined by the type of the Java class field or the type of the setter method input parameter.	Annotation target: Method or field Properties: - name The name of the property. The default is the name of the field of the Java class. This property is optional. (String) - required Whether injection is required. The default value is false. This property is optional. (Boolean)