namespace <SI-Namespace>::proxy::triggers

In module com of the AUTOSAR Adaptive Platform, namespace <SI-Namespace>::proxy::triggers provides client-side proxy classes <Trigger> for each trigger defined in the ServiceInterface in role trigger. Instantiation presumably occurs implicitly via the service proxy, through which the application addresses the trigger object to transmit a triggering signal to the service provider. Question Q-3f5a464441664c95 (open) The lifetime of the triggers is tied to the parent proxy instance, with application-side synchronization required in the case of concurrent access by multiple application threads.

more ›

Context

Namespace <SI-Namespace>::proxy::triggers is part of the communication module (com) in the AUTOSAR Adaptive Platform for Release R25-11. It serves to encapsulate client-side proxy classes for trigger elements modeled in a service interface. For each trigger declared in a ServiceInterface in role trigger, a specific service proxy trigger class <Trigger> is provided in this namespace.

In the interaction of the service-oriented architecture, this namespace acts as a targeted intermediary between the consuming client application and the interaction points of the parent service proxy. Instances of the generated class <Trigger> are presumably provided as members or via access methods of the respective service proxy and share its binding to a resolved service instance. Question Q-821f73ddacf7a754 (open) While method calls in com typically represent synchronous or asynchronous function calls with parameters and return values and events serve the continuous reception of data, a proxy-side trigger is likely to act as a lightweight trigger mechanism to transmit a signal or notification from the client side to the service provider.

Lifecycle

Because namespace <SI-Namespace>::proxy::triggers primarily provides type-generated interface elements for service proxy triggers, it defines no independent, global initialization phases or state transitions at the namespace level. The lifetime and ownership of the trigger objects are likely tied completely to the lifecycle of the parent proxy instance instead, so that no separate creation via factories or manual release routines is incurred for the client application. Question Q-34d5346fed668f0b (open)

The creation of the trigger instance occurs implicitly during the construction of the service proxy after a matching service instance has been found via service discovery. As long as the service proxy exists in memory and remains valid, the embedded <Trigger> class is also available for interactions. If the service proxy is destroyed or released, the lifetime of the associated trigger objects also ends. With regard to concurrency and thread safety, application-side synchronization must be ensured if multiple application threads access the same trigger object concurrently, as the specification describes no guarantees beyond this at the namespace level.

Usage Path

The typical sequence for using elements from namespace <SI-Namespace>::proxy::triggers follows the regular pattern of service-oriented communication on the proxy side and is divided into service discovery, proxy creation, and trigger firing.

In the first step, the Adaptive application searches for an available instance of the target service via platform mechanisms and instantiates the associated service proxy. In the second step, the application accesses the <Trigger> instance provided in the namespace via the proxy, which corresponds to the trigger modeled in the ServiceInterface. In the third step, the application executes the call on the trigger object, which sends the trigger signal to the service provider. After communication is complete, the service proxy instance is dismantled properly, concluding the usage path of the trigger class.