InstanceSupport (Apache Tomcat 8.0.15 API Documentation)

java.lang.Object
- org.apache.catalina.util.InstanceSupport

```
public final class InstanceSupport
extends Object
```
Support class to assist in firing InstanceEvent notifications to registered InstanceListeners.

Author:

Craig R. McClanahan

Constructor Summary

Constructors
Constructor and Description

InstanceSupport(Wrapper wrapper)
Construct a new InstanceSupport object associated with the specified Instance component.

Constructors
Constructor and Description
`InstanceSupport(Wrapper wrapper)` Construct a new InstanceSupport object associated with the specified Instance component.

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`addInstanceListener(InstanceListener listener)` Add a lifecycle event listener to this component.
`void`	`fireInstanceEvent(String type, Filter filter)` Notify all lifecycle event listeners that a particular event has occurred for this Container.
`void`	`fireInstanceEvent(String type, Filter filter, ServletRequest request, ServletResponse response)` Notify all lifecycle event listeners that a particular event has occurred for this Container.
`void`	`fireInstanceEvent(String type, Filter filter, ServletRequest request, ServletResponse response, Throwable exception)` Notify all lifecycle event listeners that a particular event has occurred for this Container.
`void`	`fireInstanceEvent(String type, Filter filter, Throwable exception)` Notify all lifecycle event listeners that a particular event has occurred for this Container.
`void`	`fireInstanceEvent(String type, Servlet servlet)` Notify all lifecycle event listeners that a particular event has occurred for this Container.
`void`	`fireInstanceEvent(String type, Servlet servlet, ServletRequest request, ServletResponse response)` Notify all lifecycle event listeners that a particular event has occurred for this Container.
`void`	`fireInstanceEvent(String type, Servlet servlet, ServletRequest request, ServletResponse response, Throwable exception)` Notify all lifecycle event listeners that a particular event has occurred for this Container.
`void`	`fireInstanceEvent(String type, Servlet servlet, Throwable exception)` Notify all lifecycle event listeners that a particular event has occurred for this Container.
`Wrapper`	`getWrapper()` Return the Wrapper with which we are associated.
`void`	`removeInstanceListener(InstanceListener listener)` Remove a lifecycle event listener from this component.

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

- Constructor Detail
  - InstanceSupport
```
public InstanceSupport(Wrapper wrapper)
```
    Construct a new InstanceSupport object associated with the specified Instance component.
    
    Parameters:
    wrapper - The component that will be the source of events that we fire
- Method Detail
  - getWrapper
```
public Wrapper getWrapper()
```
    Return the Wrapper with which we are associated.
  - addInstanceListener
```
public void addInstanceListener(InstanceListener listener)
```
    Add a lifecycle event listener to this component.
    
    Parameters:
    listener - The listener to add
  - fireInstanceEvent
```
public void fireInstanceEvent(String type,
                     Filter filter)
```
    Notify all lifecycle event listeners that a particular event has occurred for this Container. The default implementation performs this notification synchronously using the calling thread.
    
    Parameters:
    type - Event type
    filter - The relevant Filter for this event
  - fireInstanceEvent
```
public void fireInstanceEvent(String type,
                     Filter filter,
                     Throwable exception)
```
    Notify all lifecycle event listeners that a particular event has occurred for this Container. The default implementation performs this notification synchronously using the calling thread.
    
    Parameters:
    type - Event type
    filter - The relevant Filter for this event
    exception - Exception that occurred
  - fireInstanceEvent
```
public void fireInstanceEvent(String type,
                     Filter filter,
                     ServletRequest request,
                     ServletResponse response)
```
    Notify all lifecycle event listeners that a particular event has occurred for this Container. The default implementation performs this notification synchronously using the calling thread.
    
    Parameters:
    type - Event type
    filter - The relevant Filter for this event
    request - The servlet request we are processing
    response - The servlet response we are processing
  - fireInstanceEvent
```
public void fireInstanceEvent(String type,
                     Filter filter,
                     ServletRequest request,
                     ServletResponse response,
                     Throwable exception)
```
    Notify all lifecycle event listeners that a particular event has occurred for this Container. The default implementation performs this notification synchronously using the calling thread.
    
    Parameters:
    type - Event type
    filter - The relevant Filter for this event
    request - The servlet request we are processing
    response - The servlet response we are processing
    exception - Exception that occurred
  - fireInstanceEvent
```
public void fireInstanceEvent(String type,
                     Servlet servlet)
```
    Notify all lifecycle event listeners that a particular event has occurred for this Container. The default implementation performs this notification synchronously using the calling thread.
    
    Parameters:
    type - Event type
    servlet - The relevant Servlet for this event
  - fireInstanceEvent
```
public void fireInstanceEvent(String type,
                     Servlet servlet,
                     Throwable exception)
```
    Notify all lifecycle event listeners that a particular event has occurred for this Container. The default implementation performs this notification synchronously using the calling thread.
    
    Parameters:
    type - Event type
    servlet - The relevant Servlet for this event
    exception - Exception that occurred
  - fireInstanceEvent
```
public void fireInstanceEvent(String type,
                     Servlet servlet,
                     ServletRequest request,
                     ServletResponse response)
```
    Notify all lifecycle event listeners that a particular event has occurred for this Container. The default implementation performs this notification synchronously using the calling thread.
    
    Parameters:
    type - Event type
    servlet - The relevant Servlet for this event
    request - The servlet request we are processing
    response - The servlet response we are processing
  - fireInstanceEvent
```
public void fireInstanceEvent(String type,
                     Servlet servlet,
                     ServletRequest request,
                     ServletResponse response,
                     Throwable exception)
```
    Notify all lifecycle event listeners that a particular event has occurred for this Container. The default implementation performs this notification synchronously using the calling thread.
    
    Parameters:
    type - Event type
    servlet - The relevant Servlet for this event
    request - The servlet request we are processing
    response - The servlet response we are processing
    exception - Exception that occurred
  - removeInstanceListener
```
public void removeInstanceListener(InstanceListener listener)
```
    Remove a lifecycle event listener from this component.
    
    Parameters:
    listener - The listener to remove

Class InstanceSupport

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

InstanceSupport

Method Detail

getWrapper

addInstanceListener

fireInstanceEvent

fireInstanceEvent

fireInstanceEvent

fireInstanceEvent

fireInstanceEvent

fireInstanceEvent

fireInstanceEvent

fireInstanceEvent

removeInstanceListener