Introduce the CodeDrivenDataModelProvider #39974
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PR #39974: Size comparison from 48704fe to 82a694c Full report (32 builds for bl602, bl702, bl702l, cc13x4_26x4, cc32xx, efr32, psoc6, qpg, stm32, telink, tizen)
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andy31415
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Jul 11, 2025
| void Temporary_ReportAttributeChanged(const AttributePathParams & path) override; | ||
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| /** | ||
| * @brief Sets the persistent storage delegate for the provider. |
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This needs some explanation on why we do this. It is clear that SetPersistentStorageDelegate sets the persistent storage delegate.
I imagine this is so that we can build a ServerClusterContext ... but then I wonder if we should have a separate Initcall to provide the PersistentStorageDelegate AND the AttributePersistenceProvider to it.
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Agree, this doesn't look great.
Should we just make it an argument of CodeDrivenDataModelProvider::Startup() and get rid of the Set function?
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PR #39974: Size comparison from 48704fe to 0c0e641 Full report (56 builds for bl602, bl702, bl702l, cc13x4_26x4, cc32xx, efr32, esp32, linux, nxp, psoc6, qpg, stm32, telink, tizen)
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Summary
This Pull Request (PR) introduces the
CodeDrivenDataModelProvider, enabling a code-based approach to define data models within the Matter SDK.The
CodeDrivenDataModelProvideroperates over endpoints. It uses anEndpointInterfaceRegistryto manageEndpointInterfaceinstances. EachEndpointInterface, such as theSpanEndpoint, can be configured in code to define its device types, semantic tags, and server/client clusters. This approach contrasts with the existing more static, codegen-based (zap) approach.The
EndpointInterface,EndpointInterfaceRegistryandSpanEndpointwere introduced earlier in pull/39396 and pull/39751 and they provide the basic mechanisms where applications can define its Data Model by organizing them by endpoints and adding to the CodeDrivenDataModelProvider.To build a real application that's fully code-based/dynamic, we need all of the cluster implementations to be code-driven and implement the
ServerClusterInterface. The conversion work is ongoing in parallel. Meanwhile, while this work is not finished, we've introduced in pull/39393 theServerClusterShimwhich offers a way to wrap ember/codegen-based clusters under theServerClusterInterfaceso they can be used with theCodeDrivenDataModelProvider.The following diagram describes how all these components are related to each other:
graph TD subgraph "New Data Model Provider" CDDMP[CodeDrivenDataModelProvider] EPR[EndpointInterfaceRegistry] end subgraph "Endpoint Definition" EPI["EndpointInterface (Interface)"] SEP[SpanEndpoint] end subgraph "Server Cluster Abstraction" SCI["ServerClusterInterface (Interface)"] SCS[ServerClusterShim] end CDDMP -- "Uses" --> EPR; EPR -- "Manages 1..*" --> EPI; SEP -- "Implements" --> EPI; EPI -- "Provides 0..*" --> SCI; SCS -- "Implements (wraps Ember clusters)" --> SCI; style CDDMP fill:#f9f,stroke:#333,stroke-width:2px style EPR fill:#fbf,stroke:#333,stroke-width:2px style SEP fill:#ccf,stroke:#333,stroke-width:2px style SCS fill:#cfc,stroke:#333,stroke-width:2px style EPI fill:#eee,stroke:#333,stroke-width:1px,stroke-dasharray: 5 5 style SCI fill:#eee,stroke:#333,stroke-width:1px,stroke-dasharray: 5 5Testing
A comprehensive set of unit tests has been added. To test the
CodeDrivenDataModelProvider, run:ninja -C out src/data-model-providers/codedriven/tests:TestCodeDrivenDataModelProvider && ./out/tests/TestCodeDrivenDataModelProvider