Engine (Apache Tomcat 6.0.53 API Documentation)

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org.apache.catalina
Interface Engine

All Superinterfaces:: Container

All Known Implementing Classes:: StandardEngine

public interface Engine
extends Container
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

Field Summary

Fields inherited from interface org.apache.catalina.Container
`ADD_CHILD_EVENT, ADD_MAPPER_EVENT, ADD_VALVE_EVENT, REMOVE_CHILD_EVENT, REMOVE_MAPPER_EVENT, REMOVE_VALVE_EVENT`

Method Summary
`java.lang.String`	`getDefaultHost()` Return the default hostname for this Engine.
`java.lang.String`	`getJvmRoute()` Retrieve the JvmRouteId for this engine.
`Service`	`getService()` Return the `Service` with which we are associated (if any).
`void`	`setDefaultHost(java.lang.String defaultHost)` Set the default hostname for this Engine.
`void`	`setJvmRoute(java.lang.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, getAccessLog, getBackgroundProcessorDelay, getCluster, getInfo, getLoader, getLogger, getManager, getMappingObject, getName, getObjectName, getParent, getParentClassLoader, getPipeline, getRealm, getResources, invoke, logAccess, removeChild, removeContainerListener, removePropertyChangeListener, setBackgroundProcessorDelay, setCluster, setLoader, setManager, setName, setParent, setParentClassLoader, setRealm, setResources

Methods inherited from interface org.apache.catalina.Container

addChild, addContainerListener, addPropertyChangeListener, backgroundProcess, findChild, findChildren, findContainerListeners, getAccessLog, getBackgroundProcessorDelay, getCluster, getInfo, getLoader, getLogger, getManager, getMappingObject, getName, getObjectName, getParent, getParentClassLoader, getPipeline, getRealm, getResources, invoke, logAccess, removeChild, removeContainerListener, removePropertyChangeListener, setBackgroundProcessorDelay, setCluster, setLoader, setManager, setName, setParent, setParentClassLoader, setRealm, setResources

Method Detail

getDefaultHost

java.lang.String getDefaultHost()

Return the default hostname for this Engine.

setDefaultHost

void setDefaultHost(java.lang.String defaultHost)

Set the default hostname for this Engine.

Parameters:: defaultHost - The new default host

getJvmRoute

java.lang.String getJvmRoute()

Retrieve the JvmRouteId for this engine.

setJvmRoute

void setJvmRoute(java.lang.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()

Return 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