/*
* 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.valves;
import java.io.IOException;
import javax.management.MBeanRegistration;
import javax.management.MBeanServer;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.servlet.ServletException;
import org.apache.catalina.CometEvent;
import org.apache.catalina.Contained;
import org.apache.catalina.Container;
import org.apache.catalina.Context;
import org.apache.catalina.Engine;
import org.apache.catalina.Host;
import org.apache.catalina.Pipeline;
import org.apache.catalina.Valve;
import org.apache.catalina.Wrapper;
import org.apache.catalina.connector.Request;
import org.apache.catalina.connector.Response;
import org.apache.catalina.core.ContainerBase;
import org.apache.catalina.util.StringManager;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
/**
* Convenience base class for implementations of the <b>Valve</b> interface.
* A subclass <strong>MUST</strong> implement an <code>invoke()</code>
* method to provide the required functionality, and <strong>MAY</strong>
* implement the <code>Lifecycle</code> interface to provide configuration
* management and lifecycle support.
*
* @author Craig R. McClanahan
*
*/
public abstract class ValveBase
implements Contained, Valve, MBeanRegistration {
private static Log log = LogFactory.getLog(ValveBase.class);
//------------------------------------------------------ Instance Variables
/**
* The Container whose pipeline this Valve is a component of.
*/
protected Container container = null;
/**
* Container log
*/
protected Log containerLog = null;
/**
* Descriptive information about this Valve implementation. This value
* should be overridden by subclasses.
*/
protected static String info =
"org.apache.catalina.core.ValveBase/1.0";
/**
* The next Valve in the pipeline this Valve is a component of.
*/
protected Valve next = null;
/**
* The string manager for this package.
*/
protected final static StringManager sm =
StringManager.getManager(Constants.Package);
//-------------------------------------------------------------- Properties
/**
* Return the Container with which this Valve is associated, if any.
*/
public Container getContainer() {
return (container);
}
/**
* Set the Container with which this Valve is associated, if any.
*
* @param container The new associated container
*/
public void setContainer(Container container) {
this.container = container;
}
/**
* Return descriptive information about this Valve implementation.
*/
public String getInfo() {
return (info);
}
/**
* Return the next Valve in this pipeline, or <code>null</code> if this
* is the last Valve in the pipeline.
*/
public Valve getNext() {
return (next);
}
/**
* Set the Valve that follows this one in the pipeline it is part of.
*
* @param valve The new next valve
*/
public void setNext(Valve valve) {
this.next = valve;
}
//---------------------------------------------------------- Public Methods
/**
* Execute a periodic task, such as reloading, etc. This method will be
* invoked inside the classloading context of this container. Unexpected
* throwables will be caught and logged.
*/
public void backgroundProcess() {
}
/**
* The implementation-specific logic represented by this Valve. See the
* Valve description for the normal design patterns for this method.
* <p>
* This method <strong>MUST</strong> be provided by a subclass.
*
* @param request The servlet request to be processed
* @param response The servlet response to be created
*
* @exception IOException if an input/output error occurs
* @exception ServletException if a servlet error occurs
*/
public abstract void invoke(Request request, Response response)
throws IOException, ServletException;
/**
* Process a Comet event. This method will rarely need to be provided by
* a subclass, unless it needs to reassociate a particular object with
* the thread that is processing the request.
*
* @param request The servlet request to be processed
* @param response The servlet response to be created
*
* @exception IOException if an input/output error occurs, or is thrown
* by a subsequently invoked Valve, Filter, or Servlet
* @exception ServletException if a servlet error occurs, or is thrown
* by a subsequently invoked Valve, Filter, or Servlet
*/
public void event(Request request, Response response, CometEvent event)
throws IOException, ServletException {
// Perform the request
getNext().event(request, response, event);
}
/**
* Return a String rendering of this object.
*/
public String toString() {
StringBuffer sb = new StringBuffer(this.getClass().getName());
sb.append("[");
if (container != null)
sb.append(container.getName());
sb.append("]");
return (sb.toString());
}
// -------------------- JMX and Registration --------------------
protected String domain;
protected ObjectName oname;
protected MBeanServer mserver;
protected ObjectName controller;
public ObjectName getObjectName() {
return oname;
}
public void setObjectName(ObjectName oname) {
this.oname = oname;
}
public String getDomain() {
return domain;
}
public ObjectName preRegister(MBeanServer server,
ObjectName name) throws Exception {
oname=name;
mserver=server;
domain=name.getDomain();
return name;
}
public void postRegister(Boolean registrationDone) {
}
public void preDeregister() throws Exception {
}
public void postDeregister() {
}
public ObjectName getController() {
return controller;
}
public void setController(ObjectName controller) {
this.controller = controller;
}
/** From the name, extract the parent object name
*
* @param valveName The valve name
* @return ObjectName The parent name
*/
public ObjectName getParentName( ObjectName valveName ) {
return null;
}
public ObjectName createObjectName(String domain, ObjectName parent)
throws MalformedObjectNameException
{
Container container=this.getContainer();
if( container == null || ! (container instanceof ContainerBase) )
return null;
this.containerLog = container.getLogger();
ContainerBase containerBase=(ContainerBase)container;
Pipeline pipe=containerBase.getPipeline();
Valve valves[]=pipe.getValves();
/* Compute the "parent name" part */
String parentName="";
if (container instanceof Engine) {
} else if (container instanceof Host) {
parentName=",host=" +container.getName();
} else if (container instanceof Context) {
String path = ((Context)container).getPath();
if (path.length() < 1) {
path = "/";
}
Host host = (Host) container.getParent();
parentName=",path=" + path + ",host=" +
host.getName();
} else if (container instanceof Wrapper) {
Context ctx = (Context) container.getParent();
String path = ctx.getPath();
if (path.length() < 1) {
path = "/";
}
Host host = (Host) ctx.getParent();
parentName=",servlet=" + container.getName() +
",path=" + path + ",host=" + host.getName();
}
log.debug("valve parent=" + parentName + " " + parent);
String className=this.getClass().getName();
int period = className.lastIndexOf('.');
if (period >= 0)
className = className.substring(period + 1);
int seq=0;
for( int i=0; i<valves.length; i++ ) {
// Find other valves with the same name
if (valves[i] == this) {
break;
}
if( valves[i]!=null &&
valves[i].getClass() == this.getClass() ) {
log.debug("Duplicate " + valves[i] + " " + this + " " + container);
seq++;
}
}
String ext="";
if( seq > 0 ) {
ext=",seq=" + seq;
}
ObjectName objectName =
new ObjectName( domain + ":type=Valve,name=" + className + ext + parentName);
log.debug("valve objectname = "+objectName);
return objectName;
}
// -------------------- JMX data --------------------
public ObjectName getContainerName() {
if( container== null) return null;
return ((ContainerBase)container).getJmxName();
}
}