UpgradeProcessorBase (Apache Tomcat 8.5.57 API Documentation)

org.apache.coyote.http11.upgrade

## Class UpgradeProcessorBase

- java.lang.Object
- - org.apache.coyote.AbstractProcessorLight
  - - org.apache.coyote.http11.upgrade.UpgradeProcessorBase

- All Implemented Interfaces:
    AutoCloseable, WebConnection, Processor
  Direct Known Subclasses:
    UpgradeProcessorExternal, UpgradeProcessorInternal

      public abstract class UpgradeProcessorBase
      extends AbstractProcessorLight
      implements WebConnection

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected static int` | `INFINITE_TIMEOUT`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `UpgradeProcessorBase(UpgradeToken upgradeToken)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `AbstractEndpoint.Handler.SocketState` | `asyncPostProcess()`
    `boolean` | `checkAsyncTimeoutGeneration()` Check to see if the async generation (each cycle of async increments the generation of the AsyncStateMachine) is the same as the generation when the most recent async timeout was triggered.
    `ByteBuffer` | `getLeftoverInput()` Allows retrieving additional input during the upgrade process.
    `Request` | `getRequest()`
    `UpgradeToken` | `getUpgradeToken()` Generate an upgrade token.
    `boolean` | `isAsync()`
    `boolean` | `isUpgrade()`
    `void` | `recycle()` Recycle the processor, ready for the next request which may be on the same connection or a different connection.
    `AbstractEndpoint.Handler.SocketState` | `service(SocketWrapperBase<?> socketWrapper)` Service a 'standard' HTTP request.
    `void` | `timeoutAsync(long now)` Check this processor to see if the timeout has expired and process a timeout if that is that case.

    - ### Methods inherited from class org.apache.coyote.AbstractProcessorLight

      `addDispatch, clearDispatches, dispatch, getIteratorAndClearDispatches, getLog, logAccess, process`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

    - ### Methods inherited from interface javax.servlet.http.WebConnection

      `getInputStream, getOutputStream`

    - ### Methods inherited from interface java.lang.AutoCloseable

      `close`

    - ### Methods inherited from interface org.apache.coyote.Processor

      `pause, setSslSupport`

- - ### Field Detail

    - #### INFINITE_TIMEOUT

          protected static final int INFINITE_TIMEOUT

      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### UpgradeProcessorBase

          public UpgradeProcessorBase(UpgradeToken upgradeToken)

  - ### Method Detail

    - #### isUpgrade

          public final boolean isUpgrade()

      Specified by:
        `isUpgrade` in interface `Processor`
      Returns:
        `true` if the Processor is currently processing an upgrade request, otherwise `false`

    - #### getUpgradeToken

          public UpgradeToken getUpgradeToken()

      Description copied from interface: `Processor`
      Generate an upgrade token.
      Specified by:
        `getUpgradeToken` in interface `Processor`
      Returns:
        An upgrade token encapsulating the information required to process the upgrade request

    - #### recycle

          public final void recycle()

      Description copied from interface: `Processor`
      Recycle the processor, ready for the next request which may be on the same connection or a different connection.
      Specified by:
        `recycle` in interface `Processor`

    - #### service

          public final AbstractEndpoint.Handler.SocketState service(SocketWrapperBase<?> socketWrapper)
                                                             throws IOException

      Description copied from class: `AbstractProcessorLight`
      Service a 'standard' HTTP request. This method is called for both new requests and for requests that have partially read the HTTP request line or HTTP headers. Once the headers have been fully read this method is not called again until there is a new HTTP request to process. Note that the request type may change during processing which may result in one or more calls to `AbstractProcessorLight.dispatch(SocketEvent)`. Requests may be pipe-lined.
      Specified by:
        `service` in class `AbstractProcessorLight`
      Parameters:
        `socketWrapper` - The connection to process
      Returns:
        The state the caller should put the socket in when this method returns
      Throws:
        `IOException` - If an I/O error occurs during the processing of the request

    - #### asyncPostProcess

          public final AbstractEndpoint.Handler.SocketState asyncPostProcess()

      Specified by:
        `asyncPostProcess` in class `AbstractProcessorLight`

    - #### isAsync

          public final boolean isAsync()

      Specified by:
        `isAsync` in interface `Processor`

    - #### getRequest

          public final Request getRequest()

      Specified by:
        `getRequest` in interface `Processor`
      Returns:
        The request associated with this processor.

    - #### getLeftoverInput

          public ByteBuffer getLeftoverInput()

      Description copied from interface: `Processor`
      Allows retrieving additional input during the upgrade process.
      Specified by:
        `getLeftoverInput` in interface `Processor`
      Returns:
        leftover bytes

    - #### checkAsyncTimeoutGeneration

          public boolean checkAsyncTimeoutGeneration()

      Description copied from interface: `Processor`
      Check to see if the async generation (each cycle of async increments the generation of the AsyncStateMachine) is the same as the generation when the most recent async timeout was triggered. This is intended to be used to avoid unnecessary processing.
      Specified by:
        `checkAsyncTimeoutGeneration` in interface `Processor`
      Returns:
        `true` If the async generation has not changed since the async timeout was triggered

    - #### timeoutAsync

          public void timeoutAsync(long now)

      Description copied from interface: `Processor`
      Check this processor to see if the timeout has expired and process a timeout if that is that case.

      Note: The name of this method originated with the Servlet 3.0 asynchronous processing but evolved over time to represent a timeout that is triggered independently of the socket read/write timeouts.

      Specified by:
        `timeoutAsync` in interface `Processor`
      Parameters:
        `now` - The time (as returned by `System.currentTimeMillis()` to use as the current time to determine whether the timeout has expired. If negative, the timeout will always be treated as ifq it has expired.

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