Feature area
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Milestone
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People working on it
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Comments / description
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Status |
Assembly PM spec
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Complex properties
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Venkat |
Add support to SCDL parsers, builders and factory configuration. Integrate with data bindings. |
This has been completed and checked into the sca-java-integration branch.
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| Pass by-value / by-reference |
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Venkat |
Initial implementation almost in? Some cleanup necessary? Need to understand how to clone/copy data with different databindings, SDO, JAX-WS, and POJOs. Understand how to handle pointers across multiple parameters when copying. |
Has now been improved for performance to skip copying when the source or target is a ServiceBinding or ReferenceBinding |
| Multiplicity |
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Support multiplicity constraints on references. Support multiple wires. Handle overrides. Investigate how to handle binding selection. Support for callbacks. |
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Naming constraints in a composite
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Luciano (Tuscany-914)
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Validate that service/reference/component names are unique inside a composite. Check the presence of SCDL includes. |
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| Multi-valued properties |
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Venkat |
Add support to SCDL parsers, builders and factory configuration. Integrate with data bindings. |
This has been implemented and checked into the sca-java-integration branch. This impl. assumes that if a property is of simple type and has multiple values, then each value is defined in the scdl within an enclosing element who name is 'value'. e.g. <value>Some String Value</value>.
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WSDL 2.0
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Add support for WSDL 2.0 accross the board, runtime, WSDL/Java tools and WS binding. |
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| Operation overloading (simple exact matching) |
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Rick |
Change runtime service contract hashmap and invocation handling/dispatching. Adjust extensions to this. Match identical methods on ends of a wire. |
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Operation overloading (complete support)
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Match and wire compatible methods, factor in different databindings, WSDL wrapping/unwrapping, and match invocation and actual parameters to a compatible method. |
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ComponentType side files
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Partial support already in. Need to define overriding strategy when implementation and componentType metadata overlap.
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Support for SCA contribution
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Raymond, Luciano |
Generic handling of SCA contributions and base plugin mechanism for loading/scanning artifacts. Allow a contribution and artifacts in it to be addressed by URI. Do not assume a fixed default.scdl file.
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The following is a summary of what's available for the contribution service:
- Contribution Model
- Processing jar and folder based contributions
- Artifact loader WSDL, XSD, SCDL/Composite, Java/Class, sca-contribution.xml
- Contribution repository
- Contribution Service (add to SCA Domain using Assembly services)
- Integration with SCAMiniRuntime, unit test cases, and integration tests cases
- Very initial artifact addressing/resolving integrated into Assembly services
- Support for loading sca-contribution.xml
Design Draft
Look for the following jira issues to see what's still not available in the contribution services : TUSCANY-1158, TUSCANY-1159, TUSCANY-1160, TUSCANY-1161, TUSCANY-1162, TUSCANY-1163
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Filesystem based SCA contributions
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Raymond, Luciano |
Support free-form folder structure in a contribution. Support multiple SCDLs per contribution. Scan for SCDL and other artifacts under an SCA contribution.
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Completed and available in the sca-java-integration branch.
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JAR based SCA contributions
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Raymond, Luciano |
Support JAR contribution structure. Support multiple SCDLs per contribution. Scan for SCDL and other artifacts under an SCA contribution.
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Completed and available in the sca-java-integration branch.
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SCA includes
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This does not seem complete, verify, in particular wiring across includes and support for nested includes. |
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| Composite resolution (no recursion) |
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Luciano |
Register composites and find them by Qname within a contribution. Support references across contributions in domain level includes. |
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Composite resolution (recursive composition)
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Resolve composites with nested composites. Support full recursion. Current support needs to be fixed, as each reference to a composite gets it reloaded/redefined.
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XML property configuration in side files
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Properties configured in an external XML file. Resolve the file location, load it. See if loading and xpath reference mechanism needs to be adjusted for this.
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Ref/Service/Property config override (no recursion)
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Support overriding of services/references/properties. Investigate overrides combined with multiplicity.
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Ref/Service/Property config override (recursive)
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Support overriding of services/references/properties in nested composites. Handle multiple overrides. Support additions vs overrides in the case of bindings. Investigate overrides combined with multiplicity.
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Wiring with service/reference bindings
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Support binding URIs. Then configuration of binding URI with wires. Then propagation of binding info from a service to a reference wired to it.
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Support for WS binding mainly completed determining the URI from all the combinations described in the assembly and WS binding specs. |
Support for business exceptions
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Rick, Raymond |
Distinguish handling of runtime exceptions vs business exceptions. Add support to invocation/dispatching mechanism + POJO implementations, bindings and databinding.
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We added the support for intra-composite and inter-composite over binding.axis2. Please see the Design Draft. There are a few itest cases you can play with.
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Context info in error reports
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Across the board, need to provide application level context data (composite, component, service, reference etc.) with errors, to allow an app developer to understand what's wrong in his application. Without that he's left having to understand all the underlying middleware.
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Minimum SCDL extensibility (non SCA namespaces)
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Support additional bindings, implementation types, interface types, and policies from diff namespaces. Should already work for bindings and implementations. Need to check policies and interface types.
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Complete SCDL extensibility as defined by the XSD
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Will need changes to a number of loaders and builders.
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Support for xsi:type in addition to global elements
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Changes to most loaders or improvements to LoaderRegistry.
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Support for various ordering of SCDL elements
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Simon |
Loaders depend on a specific order of elements in the SCDL files. Supporting other possible sequences will require changes in the loaders logic.
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Autowire - local
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Adjust to the spec, which now defines this at the assembly level, independent of the Java C&I.
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Autowire - domain level
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Support autowire in a domain, including components services and references, policy intents and compatible bindings.
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Autowire extension point
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Plugin mechanism to allow different autowire algorithms to be plugged in
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SCDL validation, semantic constraints (obvious cases)
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Only support the obvious/main semantic constraints. Separate tool to perform semantic validation of an assembly. Also needs to be invoked as part of deployment and/or loading at runtime.
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SCDL validation, semantic constraints (complete)
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Complete support for the spec. Separate tool to perform semantic validation of an assembly. Also needs to be invoked as part of deployment and/or loading at runtime.
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Implementation / component matching
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Make sure that an implementation matches the component that uses it. For example enforce wiring of required references.
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| Callback support |
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Ignacio |
Combinations of sync and async. Determine which binding to use for a callback invocation. |
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Configured implementations
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Configuration of component implementations in .componentType files or inlined in implementations (spec issue 8) and in component declarations. Resolve/merge when overlap between the three. |
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Promotion of Ref/ Services/ Properties (no recursion)
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New promotion mechanism for services/references/properties. Service/reference/property definition on components. Handle promotion of already wired services and references. |
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| Promotion of Ref/ Services/ Properties (recursive) |
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New promotion mechanism for services/references/properties. Service/reference/property definition on components. Handle promotion of already wired services and references. |
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| Multiple bindings on services and refs |
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Basic support for multiple bindings is in. See how configuration overriding works with multiple bindings. |
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Ability to use and alter SCDL model at deployment
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Sebastien |
Add missing relationships to the SCDL logical model, independent of runtime context. Allow deployment tools to alter the model and write it back to XML.
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| Interchangeability of Java and WSDL |
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Ant, Rick |
Build ServiceContract representation from Java or WSDL. Needs more work to understand combinations of SDO/JAXB/POJOs and wrapped/unwrapped. Add logic to wiring framework to match WSDL portTypes and Java interfaces. |
Support for using interface.java or interface.wsdl interchangably completed. See TUSCANY-1111 for some limitations, mainly due to limitations of the databinding framework. |
Document limitations and deviations from the spec
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Review the spec and document Tuscany limitations and differences with the SCA assembly spec.
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Java C&I spec
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Derive service name from interface name
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Clarify with specification, is the service name the fully qualified class name, the class name without the package name, or are we adding a service name attribute to the @Service annotation
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| Injection of multivalued properties |
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Raymond |
Map multi-valued properties to java.util.Collection or []. |
Supported by sca-java-integration branch now. |
Injection of references with multiplicity 0..n
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Raymond |
Map references with Multiplicity to java.util.Collection or []. |
Supported by sca-java-integration branch now. |
Required properties
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Validation that required properties are configured
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Service references (minimum)
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Minimum implementation of Service references supporting setCallback/getCallback. Local usage only with no serialization of the reference.
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Service references (complete support)
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Complete support for the Service reference programming model, including the ability to pass Service References around, serialize them, then use them to perform invocations outside of the context where they were initially obtained. |
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Conversational
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Not sure what's missing. Check the spec against the runtime to assess what's remaining first.
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WSDL2Java / Java2WSDL / SDO - simple cases
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Command line tooling. Support wrapped/non-wrapped patterns, multiple parts/message, nested complex types, faults/Exceptions. Generation of SCA annotations in interfaces. |
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WSDL2Java / Java2WSDL / JAX-WS
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Command line tooling. Wrap/integrate the JAX-WS tooling. Customize it to generate SCA annotations in interfaces? Investigate how the runtime could reuse the JAX-WS WSDL/Java mapping logic as well, since it'll need to know the mapping rules as well.
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@Autowire
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Adjust to what the latest spec, maybe a little different from the current Tuscany support.
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| Configured implementations |
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Add support for Java annotations allowing configuration of a POJO (services, references, bindings and properties) without SCDL.
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SCA as a wrapper over JAX-WS async
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Allow cast of an SCA proxy to a JAX-WS API to support the JAX-WS async programming model. |
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Ability to run with Java 2 security enabled
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This is not just related to the Java C&I. Need to go over the runtime code and wrap sections of code that access resources, threads, classloaders etc in doPrivileged blocks to allow the runtime to work in an environment with Java 2 security enabled.
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| Document limitations and deviations from the spec |
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Review the spec and document Tuscany limitations and differences with the SCA Java C&I spec. |
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Conversational PM
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| Core support |
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Ignacio, looking for volunteer to take over |
Lifecycle in. Persistence of conversation state in. Needs to support tran/recovery. Also need some redesign to avoid having to send/receive a routing path and play nicely with bindings. |
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| Integration with bindings |
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Plugin mechanism to allow a binding to declare conv capability and support conversational. Maybe define a "conversational policy intent" |
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| WS binding |
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Rick |
Map conversational to the correct MEPs. Investigate how to flow conversation id. Use WS-addressing, message-id, relates-to etc. |
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JMS-binding
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Need to understand how/if conversational means anything to the JMS binding
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EJB binding
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Check the EJB binding spec to understand what needs to be done here
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JSON-RPC binding
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Investigate if it makes sense to support conversational with this binding
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SCA default binding
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Understand how a concrete binding will be selected depending on conversational requirements (may fold into some policy intent work)
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| REST binding |
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Investigate if it makes sense to support conversational with this binding |
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HTTP Session support
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Persist session scope and conversational state with the HTTP session?
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Non-blocking PM
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| Core support |
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Ignacio, looking for volunteer to take over |
No support for async over sync yet (see spec issue) but everything else seems to be there. I am concerned with how we represent callbacks and how their info flows between remote components |
Async one-way and with callback work. Integration tests in the sca-java-integration branch are successful. We'll need to revisit later how to represent callback endpoints when flowing over bindings, in particular the Web Service and JMS bindings.
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| Integration with bindings |
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Plugin mechanism to allow a binding to declare support for async and callback, MEPs and/or polling. |
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| WS binding (short term/sync MEP) |
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Ignacio, looking for volunteer to take over |
Dispatch call to a thread and continue to use a sync MEP. Will not support unsolicited callbacks. Issue: WSDL representation of callback vs Axis2 client and sync MEP. |
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WS binding (real async MEP)
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Use an async MEP and WS-addressing and callbacks. Also investigate what needs to be done w.r.t security on the callbacks.
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JMS binding
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Sync up with the latest JMS binding spec
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EJB binding
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Do we need to support this? We support async invocation of POJOs, but people know that EJBs are synchronous.
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JSON-RPC binding
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Used in AJAX apps which are based on async exchanges. So the JSON-RPC binding should support the non-blocking PM and callbacks.
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REST binding
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Not sure if there is a requirement at all for real CRUD REST. There may be a requirement for activity based XML/HTTP services, similar to the WS binding requirement.
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SCA default binding
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Understand how a concrete binding will be selected depending on non-blocking invocation requirements.
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SCA default binding
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Client side
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Server side
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Selection of concrete binding
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Based on policy intents, capabilities of the installed runtime, and where the target service is deployed.
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JMS binding
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Adjust to latest SCDL spec
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Support for the latest SCDL syntax. Support for JMS in a JMS managed environment.
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JMS data binding support
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Support data bindings as defined in the JMS binding spec.
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Integrate with Tuscany data bindings
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Integrate with Tuscany databinding framework. Support sending/receiving JAXB or SDO objects through JMS.
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WS binding
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Adjust to latest SCDL spec
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A few changes to adjust to the latest WS binding spec.
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Configuration of WSDL2Java mapping
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Related to the Java / WSDL story. Use the SDO based and JAX-WS Java / WSDL generators to produce WSDL? Apply the corresponding mapping in the runtime as well.
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Handling of faults
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Support faults at least with SDO and JAX-WS. Support other data bindings available through the data binding framework.
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Support for attachements
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Support for RPC encoded
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Working without WSDL
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Implement the JAX-WS defaults in the absence of a WSDL definition.
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Support for wrapped/non-wrapped
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Add support for JAX-WS wrap/unwrap patterns. Apply the same principles with SDO and other data bindings.
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Support for SOAP headers
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Investigate how/if SOAP headers should be exposed to a client and target service.
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EJB binding
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Under IP-CLEARANCE process. |
| Client side |
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Server side
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Generate of EJB "wrapper" code and EJB DD?
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| Geronimo integration |
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Generate Geronimo specific artifacts, and/or tighter integration with the Geronimo runtime, potentially avoiding any code generation.
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REST binding
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Resource interface and PM
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Define a new component interface type for CRUD operations on a resource
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Client side
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Mapping to HTTP verbs on the client side
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Server side
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Dispatching of HTTP verbs to a component on the server side
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Activity style interactions
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Not real REST, similar to the WS binding but with plain XML / HTTP
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Support for HTTP headers
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Support for last-modified, etags and other HTTP headers
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JSON-RPC binding
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| Support for references |
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Currently only supports services. Needs to add client side support as well.
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| Integrate with latest toolkits |
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Integrate with latest JSON toolkits, initial integration was done some time ago, we need to refresh it.
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Complete support for JSON spec
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Check what's missing in the current runtime
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Data binding support
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Raymond |
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We have made quite a few improvements in this area in the sca-java-integration branch.
- Added introspection of java interfaces to recognize known types for various databindings
- Improved SDO and JAXB handling
- Support for exception transformations accross databindings
- Added JavaBean2StAX transformation
- Improved StAX related transformations
- Added more itest cases
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SDO and JAXB
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Support conversions between SDO and JAXB
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AXIOM support
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Support conversion from/to AXIOM
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SCDL annotations
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Define SCDL annotations to configure data bindings. Needs to be pluggable, maybe change at some point to use Intents
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Add more transformers and perf optimizations
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The databinding framework approach will perform only if we have enough transformers to reduce the number of conversions going from one format to another. |
Added the SDO --> AXIOM transformer using OMDataSource |
Policy Intent framework
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SCDL and core support, model, loaders, builders
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Intent determination algorithm
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| Wire matching |
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Binding / container configuration
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Transaction policy
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SCDL model, loaders, builders
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Runtime interceptors
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Transaction service integration
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Integration with bindings
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WS-binding support for transactions
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JMS-binding support for transactions
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EJB binding support for transactions
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SCA default binding support for transactions
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Security policy
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SCDL model, loaders, builders
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Runtime interceptors
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Authentication / autorization service integration
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Integration with bindings
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WS-binding support for security
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JMS-binding support for security
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EJB binding support for security
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SCA default binding support for security
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JSON-RPC binding support for security
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REST binding support for security
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Reliability policy
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SCDL model, loaders, builders
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Runtime interceptors
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WS-binding support for reliability
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JMS-binding support for reliability
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SCA default binding support for reliability
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Modular build
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Extensions
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Refactor extensions to improve our build system and allow the various parts of the project to be built independently
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Samples
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Refactor samples to improve our build system and allow the various parts of the project to be built independently |
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Integration tests
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Refactor integration tests to improve our build system and allow the various parts of the project to be built independently |
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Packaging / deployment
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SCA domain repository / metadata
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Raymond, Sebastien
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Define services to add/remove composites and maintain a logical SCA domain level composite. Needs to be pluggable. Support domain base URI and base URI for each binding scheme.
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Deployment of SCA contributions
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Raymond, Luciano
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Define services to add/remove SCA contributions to the SCA domain.
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Artifact addressing, resolving, loading
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Raymond, Luciano
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Plugin mechanism to handle addressing of artifacts within contributions, resolution within a contribution, conflicts between contributed artifacts and externally referenced artifacts (WSDL and XSD for example)
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Deployment extensions
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Raymond, Luciano
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Plugin mechanism to allow an extension to contribute to deployment as well.
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Tuscany classloading infrastructure
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Support classloaders per SCA contribution. Isolate the application artifacts from the Tuscany runtime artifacts.
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OSGI classloader integration
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Administration
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JMX support
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Basic services start/stop etc. Need to assess what's in the current code base.
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Diagnostic / event logging
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Go through the kernel code and add event logging plug points.
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Monitoring / instrumentation
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Go through the kernel code and add monitoring plug points. Add monitor plug points on composite, component start/stop, service invocation etc. and make sure that they are given enough context.
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Core start/stop/query admin services
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Basic core services to start/stop/query running components.
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Scenarios
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Nested composition
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Domain level wiring
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Domain wiring across runtimes
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Mixing runtimes in a composite
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Web application integration
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Mediation / routing
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Web 2.0 application
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Adjust Bigbank to the latest spec
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WS-I SupplyChain application
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Host runtimes
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Tomcat integration
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Our M2 integration story packages the whole runtime in each web app. We need another better / lighter integration.
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Geronimo integration
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Just run Tuscany webapps on Geronimo
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Geronimo integration
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A real integration with the Geronimo runtime
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OSGI integration
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Standalone server
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Spring component type
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Extend Spring to declare SCA services / refs
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This is described in the SCA for Spring spec |
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Use a Spring assembly in an SCA composition
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Looks like a subset of the SCA for Spring spec is implemented? |
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Javascript component type
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| Support for JavaScript components |
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Groovy component type
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| Support for Groovy components |
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JRuby component type
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| Support for JRuby components |
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BPEL component type
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| Support for BPEL components |
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Function test suite
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| TBD |
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Integration test suite
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| Complex composition test cases |
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Multiple runtimes / containers / bindings
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WS based test cases
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EJB based test cases
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JMS based test cases
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REST based test cases
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JSON-RPC based test cases
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Spring integration test cases
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Samples
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Sample binding
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Sample databinding
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Sample component impl. type
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Sample policy
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Simple assembly samples
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WS binding samples
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JMS binding samples
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EJB samples
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| JSON-RPC samples |
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Nested composites
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SCA default binding
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SCA include samples
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Property samples
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POJO samples
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Jruby samples
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Javascript samples
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Groovy samples
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REST samples
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Configuration override samples
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Transaction samples
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Reliability samples
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Security samples
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Standalone server samples
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Web app integration samples
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Spring integration samples
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Architecture documentation
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Kernel
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POJO support
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Plugging in a component impl type
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Plugging in a binding
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Plugging in a policy
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Plugging in a data binding
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Plugging in an interface type
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Plugging in a new host integration
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Building
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JMS binding
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WS-binding
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JSON-RPC binding
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RMI/EJB
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Deployment / packaging
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OSGI integration
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Spring integration
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User documentation
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Shelita |
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Build Tuscany
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Develop an SCA app
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Build an SCA app
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Package/Deploy
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Run
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