org.apache.catalina.Pipeline Maven / Gradle / Ivy
Show all versions of payara-embedded-all Show documentation
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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;
import org.glassfish.web.valve.GlassFishValve;
import javax.servlet.ServletException;
import java.io.IOException;
/**
* Interface describing a collection of Valves that should be executed
* in sequence when the invoke() method is invoked. It is
* required that a Valve somewhere in the pipeline (usually the last one)
* must process the request and create the corresponding response, rather
* than trying to pass the request on.
*
* There is generally a single Pipeline instance associated with each
* Container. The container's normal request processing functionality is
* generally encapsulated in a container-specific Valve, which should always
* be executed at the end of a pipeline. To facilitate this, the
* setBasic() method is provided to set the Valve instance that
* will always be executed last. Other Valves will be executed in the order
* that they were added, before the basic Valve is executed.
*
* @author Craig R. McClanahan
* @author Peter Donald
* @version $Revision: 1.2 $ $Date: 2005/12/08 01:27:18 $
*/
public interface Pipeline {
// ------------------------------------------------------------- Properties
/**
* Return the Valve instance that has been distinguished as the basic
* Valve for this Pipeline (if any).
*/
public GlassFishValve getBasic();
/**
*
Set the Valve instance that has been distinguished as the basic
* Valve for this Pipeline (if any). Prior to setting the basic Valve,
* the Valve's setContainer() will be called, if it
* implements Contained, with the owning Container as an
* argument. The method may throw an IllegalArgumentException
* if this Valve chooses not to be associated with this Container, or
* IllegalStateException if it is already associated with
* a different Container.
*
* @param valve Valve to be distinguished as the basic Valve
*/
public void setBasic(GlassFishValve valve);
/**
* @return true if this pipeline has any non basic valves, false
* otherwise
*/
public boolean hasNonBasicValves();
// --------------------------------------------------------- Public Methods
/**
* Add a new Valve to the end of the pipeline associated with this
* Container. Prior to adding the Valve, the Valve's
* setContainer() method will be called, if it implements
* Contained, with the owning Container as an argument.
* The method may throw an
* IllegalArgumentException if this Valve chooses not to
* be associated with this Container, or IllegalStateException
* if it is already associated with a different Container.
*
* @param valve Valve to be added
*
* @exception IllegalArgumentException if this Container refused to
* accept the specified Valve
* @exception IllegalArgumentException if the specified Valve refuses to be
* associated with this Container
* @exception IllegalStateException if the specified Valve is already
* associated with a different Container
*/
public void addValve(GlassFishValve valve);
/**
* Add Tomcat-style valve.
*
* @param valve the Tomcat-style valve to be added
*/
public void addValve(Valve valve);
/**
* Return the set of Valves in the pipeline associated with this
* Container, including the basic Valve (if any). If there are no
* such Valves, a zero-length array is returned.
*/
public GlassFishValve[] getValves();
/**
* Cause the specified request and response to be processed by the Valves
* associated with this pipeline, until one of these valves causes the
* response to be created and returned. The implementation must ensure
* that multiple simultaneous requests (on different threads) can be
* processed through the same Pipeline without interfering with each
* other's control flow.
*
* @param request The servlet request we are processing
* @param response The servlet response we are creating
*
* @exception IOException if an input/output error occurs
* @exception ServletException if a servlet exception is thrown
*/
public void invoke(Request request, Response response)
throws IOException, ServletException;
/**
* Remove the specified Valve from the pipeline associated with this
* Container, if it is found; otherwise, do nothing. If the Valve is
* found and removed, the Valve's setContainer(null) method
* will be called if it implements Contained.
*
* @param valve Valve to be removed
*/
public void removeValve(GlassFishValve valve);
}