Feature Matrix
Following is an index of the features currently covered by CAP, with status and availability information. In addition, we also list features, which are planned or already in development, but not yet generally available, in order to give you an idea about our roadmap.
[Legend]
| Tag | Explanation |
|---|---|
| ✔ | Generally and publicly available today |
| n/a | Not applicable for this combination |
| in prog. | In progress; likely to become available soon |
| planned | Might get picked up for development soon |
| contrib? | Not currently scheduled for development |
Domain Modeling
| CDS | |
|---|---|
| Entity-relationship modeling | ✔ |
| Views/projections | ✔ |
| Custom types | ✔ |
| Associations | ✔ |
| Annotations | ✔ |
| Aspects | ✔ |
| Services (w/redirection) | ✔ |
| Compositions of entities | ✔ |
| Composition of types | in prog. |
| Nested projections | planned |
| Calculated fields | planned |
| Managed n:m associations | contrib? |
| Linters as pluggable architecture | contrib? |
(Generic) Service Providers
| CDS | Node.js | Java | |
|---|---|---|---|
| Automatically serving CRUD requests | n/a | ✔ | ✔ |
| Reading/writing nested documents | ✔ | ✔ | ✔ |
| Automatic input validation | ✔ | ✔ | ✔ |
| Auto-filled primary keys | ✔ | ✔ | ✔ |
| Auto-filled admin data | ✔ | ✔ | ✔ |
| Implicit paging | ✔ | ✔ | planned |
| Implicit sorting | ✔ | planned | planned |
| Access control | ✔ | ✔ | ✔ |
| Serving delta requests | ✔ | planned | planned |
| Streaming & media types | ✔ | ✔ | planned |
| Automatic change logging | in prog. | in prog. | planned |
| Conflict detection via ETags | ✔ | ✔ | ✔ |
| Application-level locking | planned | planned | planned |
Enterprise Features
| CDS | Node.js | Java | |
|---|---|---|---|
| Authentication | n/a | ✔ | ✔ |
| Authorization | ✔ | ✔ | ✔ |
| Localization/i18n | ✔ | ✔ | ✔ |
| Localized data | ✔ | ✔ | ✔ |
| Temporal data | ✔ | ✔ | ✔ |
| Dynamic extensibility | ✔ | ✔ | in prog. |
| Audit logging | n/a | in prog. | planned |
| Data privacy — r/w access logs | in prog. | in prog. | planned |
| Data privacy — personal data mgmt | in prog. | in prog. | planned |
| Data privacy — retention mgmt | in prog. | in prog. | planned |
Protocol Support1
| CDS | Node.js | Java | |
|---|---|---|---|
| Local 2 | ✔ | ✔ | ✔ |
| REST | ✔ | ✔ | ✔ |
| OData V2 | ✔ | ✔3 | contrib? |
| OData V4 | ✔ | ✔ | ✔ |
| Events/Messaging | in prog. | in prog. | in prog. |
| - SAP Enterprise Messaging | n/a | in prog. | in prog. |
| - Local | n/a | ✔ | in prog. |
| - AMQP | n/a | in prog. | contrib? |
| - Kafka | n/a | contrib? | contrib? |
| - RabbitMQ | n/a | contrib? | contrib? |
| GraphQL4 | contrib? | contrib? | contrib? |
1 Each inbound and outbound
2 That are service-to-service calls in the same server
3 With restricted liability; only after double-checking with us
4 Ranked low in our current backlog, based on stakeholder requests and ratings. Could be a good case for 3rd-party contribution.
API Formats
| import | export | |
|---|---|---|
| OData EDMX v2 | ✔ | ✔ |
| OData EDMX v4 | ✔ | ✔ |
| OpenAPI | planned | in prog. |
| AsyncAPI | in prog. | in prog. |
This is about CDS only, that is, about translating the mentioned formats from and into CSN.
Databases
| CDS/deploy | Node.js | Java | |
|---|---|---|---|
| SAP HANA out of the box | ✔ | ✔ | ✔ |
| SQLite out of the box 1 | ✔ 2 | ✔ | ✔3 |
| Any SQL | n/a | ✔ | ✔ |
| Pluggable drivers architecture | in prog. | in prog. | in prog. |
| Schema evolution for any DB | contrib? | n/a | n/a |
1 For dev scenarios
2 Not for productive use!
You can already integrate your database of choice in a project or a contribution level. The last two are meant to further facilitate this by out-of-the-box features in CAP.
Frontends, Periphery
| CDS | Node.js | Java | |
|---|---|---|---|
| Serving Fiori UIs | ✔ | ✔ | ✔ |
| With Fiori draft | ✔ | ✔ | ✔ |
| Vue.js | n/a | std1 | std1 |
| React.js | n/a | std1 | std1 |
| Angular | n/a | std1 | std1 |
| Serving analytics | in prog. | planned | planned |
| Serving search engines | in prog. | planned | planned |
| Data extraction (for example, to DataHub) | in prog. | in prog. | planned |
1 “std”: supported on the level of common AJAX standards, for example, using jQuery or similar. Similar to Fiori, we or the community might provide more advanced support in future.
Cloud Platform Integration
| Node.js | Java | |
|---|---|---|
| Deploy to/run on Cloud Foundry | ✔ | ✔ |
| Deploy to/run on Kubernetes1 | contrib? | contrib? |
| Deploy/run Serveless | planned | planned |
| SaaS on-/off-boarding | ✔ | ✔ |
| Multitenancy | ✔ | ✔ |
| Health checks | ✔ | in prog. |
| Profiling (via Dynatrace, SAP stats, …) | ✔ | ✔ |
| Resilience (retry, circuit breaking) | ✔ | planned |
| Caching (for example, via Redis) | planned | planned |
1 Available on plain Kubernetes level → see blog post by Thomas Jung