org.apache.catalina.valves.ValveBase Maven / Gradle / Ivy
/*
* 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 org.apache.catalina.Contained;
import org.apache.catalina.Container;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.LifecycleState;
import org.apache.catalina.Pipeline;
import org.apache.catalina.Valve;
import org.apache.catalina.util.LifecycleMBeanBase;
import org.apache.catalina.util.ToStringUtil;
import org.apache.juli.logging.Log;
import org.apache.tomcat.util.res.StringManager;
/**
* Convenience base class for implementations of the Valve interface. A subclass MUST implement
* an invoke() method to provide the required functionality, and MAY implement the
* Lifecycle interface to provide configuration management and lifecycle support.
*
* @author Craig R. McClanahan
*/
public abstract class ValveBase extends LifecycleMBeanBase implements Contained, Valve {
protected static final StringManager sm = StringManager.getManager(ValveBase.class);
// ------------------------------------------------------ Constructor
public ValveBase() {
this(false);
}
public ValveBase(boolean asyncSupported) {
this.asyncSupported = asyncSupported;
}
// ------------------------------------------------------ Instance Variables
/**
* Does this valve support Servlet 3+ async requests?
*/
protected boolean asyncSupported;
/**
* The Container whose pipeline this Valve is a component of.
*/
protected Container container = null;
/**
* Container log
*/
protected Log containerLog = null;
/**
* The next Valve in the pipeline this Valve is a component of.
*/
protected Valve next = null;
// -------------------------------------------------------------- Properties
@Override
public Container getContainer() {
return container;
}
@Override
public void setContainer(Container container) {
this.container = container;
}
@Override
public boolean isAsyncSupported() {
return asyncSupported;
}
public void setAsyncSupported(boolean asyncSupported) {
this.asyncSupported = asyncSupported;
}
@Override
public Valve getNext() {
return next;
}
@Override
public void setNext(Valve valve) {
this.next = valve;
}
// ---------------------------------------------------------- Public Methods
/**
* {@inheritDoc}
*
* The default implementation is NO-OP.
*/
@Override
public void backgroundProcess() {
// NOOP by default
}
@Override
protected void initInternal() throws LifecycleException {
super.initInternal();
containerLog = getContainer().getLogger();
}
/**
* Start this component and implement the requirements of
* {@link org.apache.catalina.util.LifecycleBase#startInternal()}.
*
* @exception LifecycleException if this component detects a fatal error that prevents this component from being
* used
*/
@Override
protected synchronized void startInternal() throws LifecycleException {
setState(LifecycleState.STARTING);
}
/**
* Stop this component and implement the requirements of
* {@link org.apache.catalina.util.LifecycleBase#stopInternal()}.
*
* @exception LifecycleException if this component detects a fatal error that prevents this component from being
* used
*/
@Override
protected synchronized void stopInternal() throws LifecycleException {
setState(LifecycleState.STOPPING);
}
@Override
public String toString() {
return ToStringUtil.toString(this);
}
// -------------------- JMX and Registration --------------------
@Override
public String getObjectNameKeyProperties() {
StringBuilder name = new StringBuilder("type=Valve");
Container container = getContainer();
name.append(container.getMBeanKeyProperties());
int seq = 0;
// Pipeline may not be present in unit testing
Pipeline p = container.getPipeline();
if (p != null) {
for (Valve valve : p.getValves()) {
// Skip null valves
if (valve == null) {
continue;
}
// Only compare valves in pipeline until we find this valve
if (valve == this) {
break;
}
if (valve.getClass() == this.getClass()) {
// Duplicate valve earlier in pipeline
// increment sequence number
seq++;
}
}
}
if (seq > 0) {
name.append(",seq=");
name.append(seq);
}
String className = this.getClass().getName();
int period = className.lastIndexOf('.');
if (period >= 0) {
className = className.substring(period + 1);
}
name.append(",name=");
name.append(className);
return name.toString();
}
@Override
public String getDomainInternal() {
Container c = getContainer();
if (c == null) {
return null;
} else {
return c.getDomain();
}
}
}