ValveBase (Apache Tomcat 8.0.15 API Documentation)

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, CometConnectionManagerValve, CrawlerSessionManagerValve, ErrorReportValve, JDBCAccessLogValve, JvmRouteBinderValve, 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

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` The string manager for this package.

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)

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.
`void`	`event(Request request, Response response, CometEvent event)` Process a Comet event.
`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.
`abstract void`	`invoke(Request request, Response response)` The implementation-specific logic represented by this Valve.
`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, init, removeLifecycleListener, setState, setState, start, stop

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - 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.
  - sm
```
protected static final StringManager sm
```
    The string manager for this package.
- 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
  - isAsyncSupported
```
public boolean isAsyncSupported()
```
    Specified by:
    
    isAsyncSupported in interface Valve
  - setAsyncSupported
```
public void setAsyncSupported(boolean asyncSupported)
```
  - 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
  - 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
  - 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
  - invoke
```
public abstract void invoke(Request request,
          Response response)
                     throws IOException,
                            ServletException
```
    The implementation-specific logic represented by this Valve. See the Valve description for the normal design patterns for this method.
    This method MUST be provided by a subclass.
    
    Specified by:
    
    invoke in interface Valve
    
    Parameters:
    request - The servlet request to be processed
    response - The servlet response to be created
    
    Throws:
    
    IOException - if an input/output error occurs
    
    ServletException - if a servlet error occurs
  - event
```
public void event(Request request,
         Response response,
         CometEvent event)
           throws IOException,
                  ServletException
```
    Process a Comet event. This method will rarely need to be provided by a subclass, unless it needs to reassociate a particular object with the thread that is processing the request.
    
    Specified by:
    
    event in interface Valve
    
    Parameters:
    request - The servlet request to be processed
    response - The servlet response to be created
    
    Throws:
    
    IOException - if an input/output error occurs, or is thrown by a subsequently invoked Valve, Filter, or Servlet
    
    ServletException - if a servlet error occurs, or is thrown by a subsequently invoked Valve, Filter, or Servlet
  - 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
  - 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.

Class ValveBase

Field Summary

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

Fields inherited from interface org.apache.catalina.Lifecycle

Constructor Summary

Method Summary

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

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

Methods inherited from class java.lang.Object

Field Detail

asyncSupported

container

containerLog

next

sm

Constructor Detail

ValveBase

ValveBase

Method Detail

getContainer

isAsyncSupported

setAsyncSupported

setContainer

getNext

setNext

backgroundProcess

invoke

event

initInternal

startInternal

stopInternal

toString

getObjectNameKeyProperties

getDomainInternal