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74 lines
4.2 KiB
ReStructuredText
74 lines
4.2 KiB
ReStructuredText
.. _internal-apis-and-stability-guarantees:
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API stability guarantees
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--------------------------------------
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Corda makes certain commitments about what parts of the API will preserve backwards compatibility as they change and
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which will not. Over time, more of the API will fall under the stability guarantees. Thus, APIs can be categorized in the following 2 broad categories:
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* **public APIs**, for which API/`ABI <https://en.wikipedia.org/wiki/Application_binary_interface>`_ backwards compatibility guarantees are provided. See: :ref:`public-api`
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* **non-public APIs**, for which no backwards compatibility guarantees are provided. See: :ref:`non-public-api`
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.. _public-api:
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Public API
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----------
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The following modules form part of Corda's public API and we commit to API/ABI backwards compatibility in following releases, unless an incompatible change is required for security reasons:
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* **Core (net.corda.core)**: core Corda libraries such as crypto functions, types for Corda's building blocks: states, contracts, transactions, attachments, etc. and some interfaces for nodes and protocols
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* **Client RPC (net.corda.client.rpc)**: client RPC
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* **Client Jackson (net.corda.client.jackson)**: JSON support for client applications
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* **DSL Test Utils (net.corda.testing.dsl)**: a simple DSL for building pseudo-transactions (not the same as the wire protocol) for testing purposes.
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* **Test Node Driver (net.corda.testing.node, net.corda.testing.driver)**: test utilities to run nodes programmatically
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* **Test Utils (net.corda.testing.core)**: generic test utilities
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* **Http Test Utils (net.corda.testing.http)**: a small set of utilities for making HttpCalls, aimed at demos and tests.
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* **Dummy Contracts (net.corda.testing.contracts)**: dummy state and contracts for testing purposes
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* **Mock Services (net.corda.testing.services)**: mock service implementations for testing purposes
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Additionally, the **Tokens SDK (com.r3.corda.lib.tokens)** available in `the Tokens GitHub repository <https://github.com/corda/token-sdk>`_
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has a stable API.
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.. _non-public-api:
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Non-public API (experimental)
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-----------------------------
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The following modules are not part of the Corda's public API and no backwards compatibility guarantees are provided. They are further categorized in 2 classes:
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* the incubating modules, for which we will do our best to minimise disruption to developers using them until we are able to graduate them into the public API
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* the internal modules, which are not to be used, and will change without notice
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The **finance module** was the first CorDapp ever written and is a legacy module. Although it is not a part of our API guarantees, we also
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don't anticipate much future change to it. Users should use the tokens SDK instead.
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Corda incubating modules
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~~~~~~~~~~~~~~~~~~~~~~~~
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* **net.corda.confidential**: experimental support for confidential identities on the ledger
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* **net.corda.client.jfx**: support for Java FX UI
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* **net.corda.client.mock**: client mock utilities
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* **Cordformation**: Gradle integration plugins
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Corda internal modules
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~~~~~~~~~~~~~~~~~~~~~~
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Everything else is internal and will change without notice, even deleted, and should not be used. This also includes any package that has
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``.internal`` in it. So for example, ``net.corda.core.internal`` and sub-packages should not be used.
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Some of the public modules may depend on internal modules, so be careful to not rely on these transitive dependencies. In particular, the
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testing modules depend on the node module and so you may end having the node in your test classpath.
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.. warning:: The web server module will be removed in future. You should call Corda nodes through RPC from your web server of choice e.g., Spring Boot, Vertx, Undertow.
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The ``@DoNotImplement`` annotation
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----------------------------------
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Certain interfaces and abstract classes within the Corda API have been annotated
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as ``@DoNotImplement``. While we undertake not to remove or modify any of these classes' existing
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functionality, the annotation is a warning that we may need to extend them in future versions of Corda.
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Cordapp developers should therefore just use these classes "as is", and *not* attempt to extend or implement any of them themselves.
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This annotation is inherited by subclasses and sub-interfaces.
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