AsyncContextCallback (Apache Tomcat 10.1.2 API Documentation)

Package org.apache.coyote

## Interface AsyncContextCallback

- All Known Implementing Classes:
    `AsyncContextImpl`

      public interface AsyncContextCallback

  Provides a mechanism for the Coyote connectors to communicate with the `AsyncContext`. It is implemented in this manner so that the org.apache.coyote package does not have a dependency on the org.apache.catalina package.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | `decrementInProgressAsyncCount()` | Used to notify the Context that async processing has ended.
    `void` | `fireOnComplete()` |
    `void` | `incrementInProgressAsyncCount()` | Used to notify the Context that async processing has started.
    `boolean` | `isAvailable()` | Reports if the web application associated with this async request is available.

- - ### Method Detail

    - #### fireOnComplete

          void fireOnComplete()

    - #### isAvailable

          boolean isAvailable()

      Reports if the web application associated with this async request is available.
      Returns:
        `true` if the associated web application is available, otherwise `false`

    - #### incrementInProgressAsyncCount

          void incrementInProgressAsyncCount()

      Used to notify the Context that async processing has started. Specifically, for the counting of in-progress async requests to work correctly, this must be called exactly once every time the `AsyncStateMachine` transitions from DISPATCHED to any other state.

    - #### decrementInProgressAsyncCount

          void decrementInProgressAsyncCount()

      Used to notify the Context that async processing has ended. Specifically, for the counting of in-progress async requests to work correctly, this must be called exactly once every time the `AsyncStateMachine` transitions to DISPATCHED from any other state.