Unsupported SCA specification sections

Unsupported SCA specification sections

This topic lists the sections of Service Component Architecture (SCA) specifications not supported in the product.

SCA Assembly Model

SCA Policy Framework

SCA Transaction Policy

SCA Java Common Annotations and APIs

SCA Java Component Implementation

SCA Web Service Binding

SCA EJB Session Bean Binding

SCA JMS Binding

SCA Java EE Integration

SCA Spring Component Implementation

The product supports several OSOA and OASIS implementation and binding types. However, the product does not support the OASIS implementation types OSGi, Java EE (JEE), Spring, or Widget. Also, the product does not support the OASIS binding types HTTP, Atom, or JSON.
The following tables list the unsupported sections of the indicated SCA specifications.

SCA Assembly Model

The following tables list unsupported sections of the SCA OSOA and SCA OASIS specifications.

Section Not supported in SCA OSOA implementation
1.3 Component

Component attribute: constrainingType

A component element has zero implementation elements

Reference attribute wiredByImpl

1.4.1 Component Type constrainingType
1.5 Interface WSDL 2.0 interfaces are not supported.
1.5.2 Bidirectional Interfaces Callback is not supported for EJB binding.
1.5.3 Conversational Interfaces Conversation is not supported.
1.5.4 SCA-Specific Aspects for WSDL Interfaces Conversation is not supported.
1.6 Composite

Composite Attribute: local (Optional) -- whether all the components within the composite must all run in the same operating system process. local="true" means that all the components must run in the same process. local="false", which is the default, means that different components within the composite might run in different operating system processes. The product behavior is that, local or not, all components within the composite are deployed on the same JVM.

constrainingType

1.6.2 Reference

Composite reference attribute: wiredByImpl

Autowire only supported for the components within the same composite

The bindings defined on the component reference are still in effect for local wires within the composite that have the component reference as their source. The product limits the function wiring reference to outside service using binding specific endpoint URI (or using reference target). Wiring to local componentService is only supported for default binding. When autowire is set to true, the product ignores any non-default binding in the autowired reference.

1.6.3 Service The bindings defined on the component service are still in effect for local wires within the composite that target the component service. The product limits this function. Local component service can only be wired through default binding from a local component reference.
1.6.4 Wire Wire is not supported.
1.6.5 Composite Implementations Services defined in an implementing composite must use the <binding.sca> binding type. Non-SCA service bindings are not supported on inner composites. Reference bindings do not have this restriction.
Component implementations defined in an implementing composite must only be either implementation.java or implementation.composite. All other implementation types are not supported.
1.6.8 ConstrainingType ConstrainingType
1.7.2.1 Constructing Hierarchical URIs For the default binding, the product does not support the @uri attribute on the service-side binding. In other words, using a non-default URI on a service exposed over the default binding is not supported. Specifically, the @uri attribute should not be used on a <binding.sca> element that is a child of a component <service> element.
1.10.2 Contributions OSGi bundle as contribution
1.10.2.2 SCA Contribution Metadata Document sca-contribution-generated.xml
1.10.4.2 add Deployment Composite & update Deployment Composite Update Deployment Composite supported through the business-level application updateAssets command.

sections of SCA OASIS specifications. The product does
Section Not supported in SCA OASIS implementation
4 Component A component element has zero implementation elements.
4.3 Reference Set wiredByImpl to true has no effect because no implementation types currently support it.
5 Composite Set local to false has no effect. Components within a composite always run inside the same JVM.
5.5 Using Composites as Component Implementations Services defined in an implementing composite must use the <binding.sca> binding type. Non-SCA service bindings are not supported on inner composites. Reference bindings do not have this restriction.
6 Interface C++ classes and collections of C function cannot be used to describe an interface.
7.5 SCA Binding The product supports two <binding.sca> wire formats: wireFormat.default and wireFormat.javaObject.
8 SCA Definitions The elements in a definitions.xml file are visible only within the contribution containing the file. The elements are not visible to other contributions.
The product does not support the definition of binding types or implementation types.
10.2 Contributions Only contributions packaged as JAR and compressed zip files are accepted.
10.2.2. Contribution Metadata Document META-INF/sca-contributiongenerated.xml is not supported.
10.5 Operations on contributions These operations are mapped to the product console.
10.7 Domain level composite These operations are mapped to the product console.

SCA Policy Framework

The following tables list unsupported sections of the SCA OSOA and SCA OASIS specifications.

Section Not supported in SCA OSOA implementation
1 Policy Framework

@policySets (except for authorization policy)

definitions.xml (except for authorization policy)

callbacks

<operation> element

componentType file

1.9 Miscellaneous Intents The following miscellaneous intents are not supported:

SOAP

JMS

NoListener

BP.1_1

sections of SCA OASIS specifications. The product does
Section Not supported in SCA OASIS implementation
3.4 PolicySets The product supports SCA policySet elements containing authorization policy only. SCA policySet elements containing WS-Policy elements or other policy languages are not supported.
7 Security policy The web service binding (binding.ws) supports the following intents purely as informational hints to the deployer when installing a contribution. The deployer must attach a WebSphere policy set that provides the functionality of the intent. The deployer may ignore the intents and install the contribution without attaching a WebSphere policy set.

clientAuthentication

clientAuthentication.message

confidentiality

confidentiality.message

integrity

integrity.message

serverAuthentication

serverAuthentication.message
The web service binding natively supports clientAuthentication.transport, confidentiality.transport, integrity.transport, and serverAuthentication.transport. A policy set does not need to be attached for these intents.
7.3 Implementation Security Policy Intent The authorization intent requires an SCA policy set to be attached that provides the authorization intent. This attachment must be done within the contribution itself. It cannot be done using the console or commands.
9.6.5 Web Services WebSphere does not support SCA policy sets containing WS-Policy.
Binding for propagatesTransaction policy A WebSphere policy set containing the WS-Transaction policy type can be attached to binding.ws to propagate a client transaction.
10 Miscellaneous intents WebSphere does not support the noListener intent.

SCA Transaction Policy

Section Not supported in SCA OSOA implementation

<operation> element

For OASIS, the transaction policy information is in the Policy Framework specification.

SCA Java Common Annotations and APIs

The following tables list unsupported sections of the SCA OSOA and SCA OASIS specifications.

Section Not supported in SCA OSOA implementation
1 Common Annotations, APIs, Client and Implementation Model Conversation is not supported
1.2.4.2 - 1.2.4.3 Implementation Metadata @SCOPE("COMPOSITE") is not supported in the clustered environment, which means that "All service requests are dispatched to the same implementation instance for the lifetime of the containing composite" is not supported in the clustered environment.

sections of SCA OASIS specifications. The product does not support these sections of the SCA Java Common Annotations and
Section Not supported in SCA OASIS implementation
5 Client API When creating an SCAClient using SCAClientFactory, only the domain name default can be used.
7.3 Asynchronous handling of Long Running Service Operations The asyncInvocation intent is only supported when using binding.sca.
8 Policy annotations for Java The following intents, which are supported only by binding.ws, are ignored when attached to a method:

clientAuthentication

confidentiality integrity

serverAuthentication
These intents act as hints to guide the deployer to attach a WebSphere policy set to a service or reference. SCA does not support WebSphere policy set attachment at the operation level.

SCA Java Component Implementation

For OSOA, the SCA Java Component Implementation specification is fully supported, so does not have a list of unsupported sections.

sections of SCA OASIS specifications. The product does not support these sections of the SCA Java Component Implementation
Section Not supported in SCA OASIS implementation
10.1 For /import.java/@package, the version and uses directives are not supported.

SCA Web Services Binding

The following tables list unsupported sections of the SCA OSOA and SCA OASIS specifications.
Section Not supported in SCA OSOA implementation
2.1 Web Service Binding Schema

Line 47: wsdl.endpoint is not supported in /binding.ws/@wsdlElement

Line 55: wsdlLocation is not supported in /binding.ws/@wsdli:wsdlLocation
2.1.1 Endpoint URI resolution
Lines 71-79: Ordering of implementation in the product follows:
ordering for reference side: reference target-> location in wsdl ->
     EndPointReference -> binding.ws uri
ordering for service side: binding.ws name -> binding.ws uri ->
     implicit (component/service)
Line 73: URI in referenced WSDL (support limited to reference side)

Line 76: Explicit URI in binding.ws (support limited to reference side as absolute URI, on service side as relative URI (contextRoot))

Line 78: Implicit URI in binding.ws (support limited to service only)
2.1.3 Production of WSDL description for an SCA service The web container will not serve resources under the WEB-INF or META-INF directories, so avoid putting WSDL documents under these directories within the SCA asset if we want them to be accessible using ?wsdl.
SCA OASIS specifications. The product does not support
Section Not supported in SCA OASIS implementation
2.4 Production WSDL description for an SCA service The web container will not serve resources under the WEB-INF or META-INF directories, so avoid putting WSDL documents under these directories within the SCA asset if we want them to be accessible using ?wsdl.
5.3 Policy Assertion for SCA Web Service Callback Protocol Not supported

SCA EJB Session Bean Binding

The following tables list unsupported sections of the SCA OSOA and SCA OASIS specifications.

sections of SCA OSOA specifications. The product does
Section Not supported in SCA OSOA implementation
2.1 Session Bean Binding Schema
/binding.ejb/@session-type

Because the product does not support conversations, although session-type is set to "stateful", the service still behaves as stateless.
/binding.ejb/@uri
Line 91: The product only supports the following formats:
For EJB2
corbaname:iiop:<hostName>:port/NameServiceServerRoot#ejb/sca/ejbbinding
/<componentName>/<serviceName> 
For EJB3
corbaname:iiop:<hostName>:port/NameServiceServerRoot#ejb/sca/ejbbinding/
<componentName>/<serviceName>#<serviceInterfaceName>
Remote or corbaname:iiop:<hostName>:port
/NameServiceServerRoot#<serviceInterfaceName>Remote
Line 97: corbaname:rir:#ejb/MyHome
2.3.1 Conversational Nature of Stateful Session Beans Lines 197-229
SCA OASIS specifications. The product does not support
Section Not supported in SCA OASIS implementation
2 Session Bean Binding Schema binding.ejb/@uri for SCA service binding

The SCA stateless EJB implementation automatically generates a unique URI based on the component name, service name, and service interface. The URI is used as the EJB service endpoint.
See step 1 in the "Configure EJB service bindings and invoke them in caller applications" procedure.

corbaname:rir:#ejb/MyHome

The product supports the corba url format:
corbaname:iiop:host:port/NameServiceServerRoot#jndi_name

ejb-link-name

The product does not support ejb-link-name in the SCA OASIS implementation.

SCA JMS Binding

The product supports the SCA JMS Binding specification, with the exception of specification sections mentioned in the table. The OASIS Java Message Service (JMS) Binding specification was consulted for clarification of the OSOA SCA JMS Binding specification.
The following tables list unsupported sections of the SCA OSOA and SCA OASIS specifications.

sections of SCA OSOA specifications. The product does
Section Not supported in SCA OSOA implementation
1.4 JMS Binding Schema

Line 103: /binding.jms/@uri is not supported.

Line 123: /binding.jms/@responseConnection is not supported.

Line 141: /binding.jms/destination/property is not supported.

Line 143: /binding.jms/connectionFactory is supported for reference bindings only. Request connection factories are not supported for service bindings. Response connection factories are supported for service bindings.

Lines 144 and 156: plain connection factory name is not supported. Provide a JNDI name, and not a plain name.

Lines 149 and 161: plain activation spec name is not supported. Provide a JNDI name, and not a plain name.

Line 159: /binding.jms/response/activationSpec is not supported. However, line 155, /binding.jms/response/connectionFactory, is supported.

Line 171: /binding.jms/resourceAdapter is not necessary to support JMS adapters. Thus, line 171 is not supported.

1.7 Callback and Conversation Protocol Lines 250, 252, and 254: conversation is not supported.
1.7.3 Conversations Line 267: conversation is not supported.

sections of SCA OASIS specifications. The product does
Section Not supported in SCA OASIS implementation
3 JMS Binding Schema

Line 148: /binding.jms/@uri is not supported.

Line 234: /binding.jms/destination/property is not supported.

Line 236: /binding.jms/connectionFactory is supported for reference bindings only. Request connection factories are not supported for service bindings. Response connection factories are supported for service bindings.

Line 264: /binding.jms/response/activationSpec is not supported. However, line 259, /binding.jms/response/connectionFactory, is supported.

Line 291: /binding.jms/resourceAdapter is not necessary to support JMS adapters. Thus, line 291 is not supported.

SCA Java EE Integration

The product supports all Java EE components consuming SCA services over default bindings within the context of annotations. The product supports the following specification sections:

5.2.1 Dependency Injection

5.4.1 Dependency Injection

5.2.4 Creating SCA Components that use Message Driven Beans as Implementation Types

5.4.4 Using SCA References from JSPs supported within the context of Section 5.2.1

5.4.5 Creating SCA Components that Use Web Modules as Implementation Types supported within the context of Section 5.4.1

of SCA OSOA specifications. The product does not support
Section Not supported in SCA OSOA implementation
5.1.3 Dependency Injection Lines 241-242: callback and conversation are not supported
5.1.5 Using a ComponentType Side-File Not supported
5.1.6 Creating SCA components that use Session Beans as Implementation Types Supported for components in application.composite within the EAR.
Otherwise, not supported.
5.1.8 Use of Implementation Scopes with Session Beans Conversational is not supported
5.1.9 SCA Conversational Behavior with Session Beans Conversational is not supported
5.1.10 Non-Blocking Service Operations Not supported
5.1.11 Accessing a Callback Service Not supported
5.3 Mapping of EJB Transaction Demarcation to SCA Transaction Policies Not supported
5.4.3 Providing additional Component Type Data for a Web Application Files with .componentType extension are not supported
6.1.1 Java EE Archives as SCA Contributions Not supported because contributions are not supported.
6.1.2 Local Assembly of SCA-enhanced Java EE Applications Not supported
6.1.3 The Application Composite Supported, except for the following:

application.composite file as a deployable composite

Enterprise archive (EAR) as an SCA contribution

6.1.4 Domain Level Assembly of SCA-enhanced Java EE Applications Not supported
6.1.5 Import and Export of SCA Artifacts Not supported
6.1.6 Resolution of WSDL and XSD artifacts Not supported
7 Java EE Archives as Service Component Implementations The product supports Java EE archives as service component implementations, except the SCA JAR and the EAR must be in separate packages or assets. The EAR can contain an optional application.composite file under its META-INF directory that defines the componentType of the EAR. The product supports dependency injection.
The product does not support the following:

application.composite file as a deployable composite

web.composite and ejb-jar.composite files within the EAR

EAR as an SCA contribution

SCA JAR within the EAR

The OASIS SCA Java EE specification is not supported by the product.

SCA Spring Component Implementation

The product supports the SCA Spring Component Implementation specification except for the specification sections, or parts of sections, listed in the table.
The product also supports Spring Component Implementation beyond what is described in the specification:

Constructor injection

<import> elements in application context files
For more information, see the topic on additional Spring component implementation features.

sections of SCA OSOA specifications. The product does not support these sections of the SCA Spring Component Implementation
Section Not supported in SCA OSOA implementation
1.2. Spring Application Context as Composite Implementation

As to section 1.2, only the SCA (default) binding, web service binding, EJB binding, and JMS binding are supported.

Exposing a Spring bean as a service is not supported when the bean implements multiple interfaces. A Specs JIRA is open for this issue; see http://oasis-opencsa.org/sca.
To resolve this problem, explicitly define a <sca:service> element in the Spring application context file. If no explicit definition of <sca:service> is available, the problems remains by default when you expose all the beans as defined in the Spring context as services.

Callbacks are not supported.

Pass by reference is not supported.

1.2.1. Direct use of SCA references within a Spring configuration Under the specification, the <implementation.spring> location attribute can specify the target uniform resource indicator (URI) of a directory containing the Spring application context files. The META-INF/MANIFEST.MF file is used to locate the Spring application context file. If there is no MANIFEST.MF file or no Spring-Context header within that file, then the default behavior is to build an application context using all the *.xml files in the META-INF/spring directory.
Currently, if there is no MANIFEST.MF file or no Spring-Context header within that file, then the default behavior is to build an application context using the application-context.xml file in the META-INF/spring directory. If the META-INF/spring/application-context.xml file does not exist, then the application does not deploy.
The product cannot support loading of *.xml files because the specification does not describe how to handle multiple spring context files.
The product does not support use of an archive file for the location attribute.

The OASIS SCA Spring Component Implementation specification is not supported by the product.

Related concepts

Specifications and API documentation

Additional Spring component implementation features

Section	Not supported in SCA OSOA implementation
1.3 Component	Component attribute: constrainingType A component element has zero implementation elements Reference attribute wiredByImpl
1.4.1 Component Type	constrainingType
1.5 Interface	WSDL 2.0 interfaces are not supported.
1.5.2 Bidirectional Interfaces	Callback is not supported for EJB binding.
1.5.3 Conversational Interfaces	Conversation is not supported.
1.5.4 SCA-Specific Aspects for WSDL Interfaces	Conversation is not supported.
1.6 Composite	Composite Attribute: local (Optional) -- whether all the components within the composite must all run in the same operating system process. local="true" means that all the components must run in the same process. local="false", which is the default, means that different components within the composite might run in different operating system processes. The product behavior is that, local or not, all components within the composite are deployed on the same JVM. constrainingType
1.6.2 Reference	Composite reference attribute: wiredByImpl Autowire only supported for the components within the same composite The bindings defined on the component reference are still in effect for local wires within the composite that have the component reference as their source. The product limits the function wiring reference to outside service using binding specific endpoint URI (or using reference target). Wiring to local componentService is only supported for default binding. When autowire is set to true, the product ignores any non-default binding in the autowired reference.
1.6.3 Service	The bindings defined on the component service are still in effect for local wires within the composite that target the component service. The product limits this function. Local component service can only be wired through default binding from a local component reference.
1.6.4 Wire	Wire is not supported.
1.6.5 Composite Implementations	Services defined in an implementing composite must use the <binding.sca> binding type. Non-SCA service bindings are not supported on inner composites. Reference bindings do not have this restriction. Component implementations defined in an implementing composite must only be either implementation.java or implementation.composite. All other implementation types are not supported.
1.6.8 ConstrainingType	ConstrainingType
1.7.2.1 Constructing Hierarchical URIs	For the default binding, the product does not support the @uri attribute on the service-side binding. In other words, using a non-default URI on a service exposed over the default binding is not supported. Specifically, the @uri attribute should not be used on a <binding.sca> element that is a child of a component <service> element.
1.10.2 Contributions	OSGi bundle as contribution
1.10.2.2 SCA Contribution Metadata Document	sca-contribution-generated.xml
1.10.4.2 add Deployment Composite & update Deployment Composite	Update Deployment Composite supported through the business-level application updateAssets command.

Section	Not supported in SCA OASIS implementation
4 Component	A component element has zero implementation elements.
4.3 Reference	Set wiredByImpl to true has no effect because no implementation types currently support it.
5 Composite	Set local to false has no effect. Components within a composite always run inside the same JVM.
5.5 Using Composites as Component Implementations	Services defined in an implementing composite must use the <binding.sca> binding type. Non-SCA service bindings are not supported on inner composites. Reference bindings do not have this restriction.
6 Interface	C++ classes and collections of C function cannot be used to describe an interface.
7.5 SCA Binding	The product supports two <binding.sca> wire formats: wireFormat.default and wireFormat.javaObject.
8 SCA Definitions	The elements in a definitions.xml file are visible only within the contribution containing the file. The elements are not visible to other contributions. The product does not support the definition of binding types or implementation types.
10.2 Contributions	Only contributions packaged as JAR and compressed zip files are accepted.
10.2.2. Contribution Metadata Document	META-INF/sca-contributiongenerated.xml is not supported.
10.5 Operations on contributions	These operations are mapped to the product console.
10.7 Domain level composite	These operations are mapped to the product console.

Section	Not supported in SCA OASIS implementation
3.4 PolicySets	The product supports SCA policySet elements containing authorization policy only. SCA policySet elements containing WS-Policy elements or other policy languages are not supported.
7 Security policy	The web service binding (binding.ws) supports the following intents purely as informational hints to the deployer when installing a contribution. The deployer must attach a WebSphere policy set that provides the functionality of the intent. The deployer may ignore the intents and install the contribution without attaching a WebSphere policy set. clientAuthentication clientAuthentication.message confidentiality confidentiality.message integrity integrity.message serverAuthentication serverAuthentication.message The web service binding natively supports clientAuthentication.transport, confidentiality.transport, integrity.transport, and serverAuthentication.transport. A policy set does not need to be attached for these intents.
7.3 Implementation Security Policy Intent	The authorization intent requires an SCA policy set to be attached that provides the authorization intent. This attachment must be done within the contribution itself. It cannot be done using the console or commands.
9.6.5 Web Services	WebSphere does not support SCA policy sets containing WS-Policy.
Binding for propagatesTransaction policy	A WebSphere policy set containing the WS-Transaction policy type can be attached to binding.ws to propagate a client transaction.
10 Miscellaneous intents	WebSphere does not support the noListener intent.

Section	Not supported in SCA OSOA implementation
1 Common Annotations, APIs, Client and Implementation Model	Conversation is not supported
1.2.4.2 - 1.2.4.3 Implementation Metadata	@SCOPE("COMPOSITE") is not supported in the clustered environment, which means that "All service requests are dispatched to the same implementation instance for the lifetime of the containing composite" is not supported in the clustered environment.

Section	Not supported in SCA OASIS implementation
2.4 Production WSDL description for an SCA service	The web container will not serve resources under the WEB-INF or META-INF directories, so avoid putting WSDL documents under these directories within the SCA asset if we want them to be accessible using ?wsdl.
5.3 Policy Assertion for SCA Web Service Callback Protocol	Not supported

Section	Not supported in SCA OSOA implementation
5.1.3 Dependency Injection	Lines 241-242: callback and conversation are not supported
5.1.5 Using a ComponentType Side-File	Not supported
5.1.6 Creating SCA components that use Session Beans as Implementation Types	Supported for components in application.composite within the EAR. Otherwise, not supported.
5.1.8 Use of Implementation Scopes with Session Beans	Conversational is not supported
5.1.9 SCA Conversational Behavior with Session Beans	Conversational is not supported
5.1.10 Non-Blocking Service Operations	Not supported
5.1.11 Accessing a Callback Service	Not supported
5.3 Mapping of EJB Transaction Demarcation to SCA Transaction Policies	Not supported
5.4.3 Providing additional Component Type Data for a Web Application	Files with .componentType extension are not supported
6.1.1 Java EE Archives as SCA Contributions	Not supported because contributions are not supported.
6.1.2 Local Assembly of SCA-enhanced Java EE Applications	Not supported
6.1.3 The Application Composite	Supported, except for the following: application.composite file as a deployable composite Enterprise archive (EAR) as an SCA contribution
6.1.4 Domain Level Assembly of SCA-enhanced Java EE Applications	Not supported
6.1.5 Import and Export of SCA Artifacts	Not supported
6.1.6 Resolution of WSDL and XSD artifacts	Not supported
7 Java EE Archives as Service Component Implementations	The product supports Java EE archives as service component implementations, except the SCA JAR and the EAR must be in separate packages or assets. The EAR can contain an optional application.composite file under its META-INF directory that defines the componentType of the EAR. The product supports dependency injection. The product does not support the following: application.composite file as a deployable composite web.composite and ejb-jar.composite files within the EAR EAR as an SCA contribution SCA JAR within the EAR