Package org.apache.catalina

Interface Engine

All Superinterfaces:

Container, Lifecycle

All Known Implementing Classes:

StandardEngine

public interface Engine
extends Container

An Engine is a Container that represents the entire Catalina servlet engine. It is useful in the following types of scenarios:

• You wish to use Interceptors that see every single request processed by the entire engine.
• You wish to run Catalina in with a standalone HTTP connector, but still want support for multiple virtual hosts.

In general, you would not use an Engine when deploying Catalina connected to a web server (such as Apache), because the Connector will have utilized the web server's facilities to determine which Context (or perhaps even which Wrapper) should be utilized to process this request.

The child containers attached to an Engine are generally implementations of Host (representing a virtual host) or Context (representing individual an individual servlet context), depending upon the Engine implementation.

If used, an Engine is always the top level Container in a Catalina hierarchy. Therefore, the implementation's setParent() method should throw IllegalArgumentException.

Author:

Craig R. McClanahan

Nested Class Summary

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

Lifecycle.SingleUse

Field Summary

Fields inherited from interface org.apache.catalina.Container

ADD_CHILD_EVENT, ADD_VALVE_EVENT, REMOVE_CHILD_EVENT, REMOVE_VALVE_EVENT

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

Method Summary

Modifier and Type	Method	Description
String	getDefaultHost()
String	getJvmRoute()
Service	getService()
void	setDefaultHost(String defaultHost)	Set the default hostname for this Engine.
void	setJvmRoute(String jvmRouteId)	Set the JvmRouteId for this engine.
void	setService(Service service)	Set the Service with which we are associated (if any).

Methods inherited from interface org.apache.catalina.Container

addChild, addContainerListener, addPropertyChangeListener, backgroundProcess, findChild, findChildren, findContainerListeners, fireContainerEvent, getAccessLog, getBackgroundProcessorDelay, getCatalinaBase, getCatalinaHome, getCluster, getDomain, getLogger, getLogName, getMBeanKeyProperties, getName, getObjectName, getParent, getParentClassLoader, getPipeline, getRealm, getStartStopThreads, logAccess, removeChild, removeContainerListener, removePropertyChangeListener, setBackgroundProcessorDelay, setCluster, setName, setParent, setParentClassLoader, setRealm, setStartStopThreads

Methods inherited from interface org.apache.catalina.Lifecycle

addLifecycleListener, destroy, findLifecycleListeners, getState, getStateName, init, removeLifecycleListener, start, stop

Method Details

getDefaultHost

String getDefaultHost()

Returns:

the default host name for this Engine.

setDefaultHost

void setDefaultHost(String defaultHost)

Set the default hostname for this Engine.

Parameters:

defaultHost - The new default host

getJvmRoute

String getJvmRoute()

Returns:

the JvmRouteId for this engine.

setJvmRoute

void setJvmRoute(String jvmRouteId)

Set the JvmRouteId for this engine.

Parameters:

jvmRouteId - the (new) JVM Route ID. Each Engine within a cluster must have a unique JVM Route ID.

getService

Service getService()

Returns:

the Service with which we are associated (if any).

setService

void setService(Service service)

Set the Service with which we are associated (if any).

Parameters:

service - The service that owns this Engine