org.apache.catalina.valves

## Class ValveBase

- java.lang.Object
- - org.apache.catalina.util.LifecycleBase
  - - org.apache.catalina.util.LifecycleMBeanBase
    - - org.apache.catalina.valves.ValveBase

- All Implemented Interfaces:
    MBeanRegistration, Contained, JmxEnabled, Lifecycle, Valve
  Direct Known Subclasses:
    AbstractAccessLogValve, AuthenticatorBase, CrawlerSessionManagerValve, ErrorReportValve, JDBCAccessLogValve, JvmRouteBinderValve, LoadBalancerDrainingValve, PersistentValve, RemoteIpValve, ReplicationValve, RequestFilterValve, RewriteValve, SemaphoreValve, SingleSignOn, SSLValve, StuckThreadDetectionValve

      public abstract class ValveBase
      extends LifecycleMBeanBase
      implements Contained, Valve

  Convenience base class for implementations of the Valve interface. A subclass MUST implement an `invoke()` method to provide the required functionality, and MAY implement the `Lifecycle` interface to provide configuration management and lifecycle support.
  Author:
    Craig R. McClanahan

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from interface org.apache.catalina.Lifecycle

      `Lifecycle.SingleUse`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected boolean` | `asyncSupported` Does this valve support Servlet 3+ async requests?
    `protected Container` | `container` The Container whose pipeline this Valve is a component of.
    `protected Log` | `containerLog` Container log
    `protected Valve` | `next` The next Valve in the pipeline this Valve is a component of.
    `protected static StringManager` | `sm`

    - ### Fields inherited from class org.apache.catalina.util.LifecycleMBeanBase

      `mserver`

    - ### Fields inherited from interface org.apache.catalina.Lifecycle

      `AFTER_DESTROY_EVENT, AFTER_INIT_EVENT, AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_DESTROY_EVENT, BEFORE_INIT_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, CONFIGURE_START_EVENT, CONFIGURE_STOP_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ValveBase()`
    `ValveBase(boolean asyncSupported)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `backgroundProcess()` Execute a periodic task, such as reloading, etc.
    `Container` | `getContainer()` Return the Container with which this Valve is associated, if any.
    `String` | `getDomainInternal()` Method implemented by sub-classes to identify the domain in which MBeans should be registered.
    `Valve` | `getNext()` Return the next Valve in this pipeline, or `null` if this is the last Valve in the pipeline.
    `String` | `getObjectNameKeyProperties()` Allow sub-classes to specify the key properties component of the `ObjectName` that will be used to register this component.
    `protected void` | `initInternal()` Sub-classes wishing to perform additional initialization should override this method, ensuring that super.initInternal() is the first call in the overriding method.
    `boolean` | `isAsyncSupported()`
    `void` | `setAsyncSupported(boolean asyncSupported)`
    `void` | `setContainer(Container container)` Set the Container with which this Valve is associated, if any.
    `void` | `setNext(Valve valve)` Set the Valve that follows this one in the pipeline it is part of.
    `protected void` | `startInternal()` Start this component and implement the requirements of `LifecycleBase.startInternal()`.
    `protected void` | `stopInternal()` Stop this component and implement the requirements of `LifecycleBase.stopInternal()`.
    `String` | `toString()` Return a String rendering of this object.

    - ### Methods inherited from class org.apache.catalina.util.LifecycleMBeanBase

      `destroyInternal, getDomain, getObjectName, postDeregister, postRegister, preDeregister, preRegister, register, setDomain, unregister`

    - ### Methods inherited from class org.apache.catalina.util.LifecycleBase

      `addLifecycleListener, destroy, findLifecycleListeners, fireLifecycleEvent, getState, getStateName, getThrowOnFailure, init, removeLifecycleListener, setState, setState, setThrowOnFailure, start, stop`

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

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

    - ### Methods inherited from interface org.apache.catalina.Valve

      `invoke`

- - ### Field Detail

    - #### sm

          protected static final StringManager sm

    - #### asyncSupported

          protected boolean asyncSupported

      Does this valve support Servlet 3+ async requests?

    - #### container

          protected Container container

      The Container whose pipeline this Valve is a component of.

    - #### containerLog

          protected Log containerLog

      Container log

    - #### next

          protected Valve next

      The next Valve in the pipeline this Valve is a component of.

  - ### Constructor Detail

    - #### ValveBase

          public ValveBase()

    - #### ValveBase

          public ValveBase(boolean asyncSupported)

  - ### Method Detail

    - #### getContainer

          public Container getContainer()

      Return the Container with which this Valve is associated, if any.
      Specified by:
        `getContainer` in interface `Contained`
      Returns:
        The Container with which this instance is associated or `null` if not associated with a Container

    - #### setContainer

          public void setContainer(Container container)

      Set the Container with which this Valve is associated, if any.
      Specified by:
        `setContainer` in interface `Contained`
      Parameters:
        `container` - The new associated container

    - #### isAsyncSupported

          public boolean isAsyncSupported()

      Specified by:
        `isAsyncSupported` in interface `Valve`

    - #### setAsyncSupported

          public void setAsyncSupported(boolean asyncSupported)

    - #### getNext

          public Valve getNext()

      Return the next Valve in this pipeline, or `null` if this is the last Valve in the pipeline.
      Specified by:
        `getNext` in interface `Valve`
      Returns:
        the next Valve in the pipeline containing this Valve, if any.

    - #### setNext

          public void setNext(Valve valve)

      Set the Valve that follows this one in the pipeline it is part of.
      Specified by:
        `setNext` in interface `Valve`
      Parameters:
        `valve` - The new next valve

    - #### backgroundProcess

          public void backgroundProcess()

      Execute a periodic task, such as reloading, etc. This method will be invoked inside the classloading context of this container. Unexpected throwables will be caught and logged.
      Specified by:
        `backgroundProcess` in interface `Valve`

    - #### initInternal

          protected void initInternal()
                               throws LifecycleException

      Description copied from class: `LifecycleMBeanBase`
      Sub-classes wishing to perform additional initialization should override this method, ensuring that super.initInternal() is the first call in the overriding method.
      Overrides:
        `initInternal` in class `LifecycleMBeanBase`
      Throws:
        `LifecycleException` - If the initialisation fails

    - #### startInternal

          protected void startInternal()
                                throws LifecycleException

      Start this component and implement the requirements of `LifecycleBase.startInternal()`.
      Specified by:
        `startInternal` in class `LifecycleBase`
      Throws:
        `LifecycleException` - if this component detects a fatal error that prevents this component from being used

    - #### stopInternal

          protected void stopInternal()
                               throws LifecycleException

      Stop this component and implement the requirements of `LifecycleBase.stopInternal()`.
      Specified by:
        `stopInternal` in class `LifecycleBase`
      Throws:
        `LifecycleException` - if this component detects a fatal error that prevents this component from being used

    - #### toString

          public String toString()

      Return a String rendering of this object.
      Overrides:
        `toString` in class `Object`

    - #### getObjectNameKeyProperties

          public String getObjectNameKeyProperties()

      Description copied from class: `LifecycleMBeanBase`
      Allow sub-classes to specify the key properties component of the `ObjectName` that will be used to register this component.
      Specified by:
        `getObjectNameKeyProperties` in class `LifecycleMBeanBase`
      Returns:
        The string representation of the key properties component of the desired `ObjectName`

    - #### getDomainInternal

          public String getDomainInternal()

      Description copied from class: `LifecycleMBeanBase`
      Method implemented by sub-classes to identify the domain in which MBeans should be registered.
      Specified by:
        `getDomainInternal` in class `LifecycleMBeanBase`
      Returns:
        The name of the domain to use to register MBeans.

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