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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.catalina;
/**
* An <b>Engine</b> is a Container that represents the entire Catalina servlet engine. It is useful in the following
* types of scenarios:
* <ul>
* <li>You wish to use Interceptors that see every single request processed by the entire engine.
* <li>You wish to run Catalina in with a standalone HTTP connector, but still want support for multiple virtual hosts.
* </ul>
* 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.
* <p>
* 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.
* <p>
* If used, an Engine is always the top level Container in a Catalina hierarchy. Therefore, the implementation's
* <code>setParent()</code> method should throw <code>IllegalArgumentException</code>.
*
* @author Craig R. McClanahan
*/
public interface Engine extends Container {
/**
* @return the default host name for this Engine.
*/
String getDefaultHost();
/**
* Set the default hostname for this Engine.
*
* @param defaultHost The new default host
*/
void setDefaultHost(String defaultHost);
/**
* @return the JvmRouteId for this engine.
*/
String getJvmRoute();
/**
* Set the JvmRouteId for this engine.
*
* @param jvmRouteId the (new) JVM Route ID. Each Engine within a cluster must have a unique JVM Route ID.
*/
void setJvmRoute(String jvmRouteId);
/**
* @return the <code>Service</code> with which we are associated (if any).
*/
Service getService();
/**
* Set the <code>Service</code> with which we are associated (if any).
*
* @param service The service that owns this Engine
*/
void setService(Service service);
}
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