/*
* 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.core;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketTimeoutException;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLClassLoader;
import java.security.AccessControlException;
import java.util.Random;
import javax.management.ObjectName;
import org.apache.catalina.Context;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.LifecycleState;
import org.apache.catalina.Server;
import org.apache.catalina.Service;
import org.apache.catalina.deploy.NamingResources;
import org.apache.catalina.mbeans.MBeanFactory;
import org.apache.catalina.mbeans.MBeanUtils;
import org.apache.catalina.startup.Catalina;
import org.apache.catalina.util.ExtensionValidator;
import org.apache.catalina.util.LifecycleMBeanBase;
import org.apache.catalina.util.ServerInfo;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.ExceptionUtils;
import org.apache.tomcat.util.buf.StringCache;
import org.apache.tomcat.util.res.StringManager;
/**
* Standard implementation of the <b>Server</b> interface, available for use
* (but not required) when deploying and starting Catalina.
*
* @author Craig R. McClanahan
*/
public final class StandardServer extends LifecycleMBeanBase implements Server {
private static final Log log = LogFactory.getLog(StandardServer.class);
// ------------------------------------------------------------ Constructor
/**
* Construct a default instance of this class.
*/
public StandardServer() {
super();
globalNamingResources = new NamingResources();
globalNamingResources.setContainer(this);
if (isUseNaming()) {
namingContextListener = new NamingContextListener();
addLifecycleListener(namingContextListener);
}
}
// ----------------------------------------------------- Instance Variables
/**
* Global naming resources context.
*/
private javax.naming.Context globalNamingContext = null;
/**
* Global naming resources.
*/
private NamingResources globalNamingResources = null;
/**
* Descriptive information about this Server implementation.
*/
private static final String info =
"org.apache.catalina.core.StandardServer/1.0";
/**
* The naming context listener for this web application.
*/
private NamingContextListener namingContextListener = null;
/**
* The port number on which we wait for shutdown commands.
*/
private int port = 8005;
/**
* The address on which we wait for shutdown commands.
*/
private String address = "localhost";
/**
* A random number generator that is <strong>only</strong> used if
* the shutdown command string is longer than 1024 characters.
*/
private Random random = null;
/**
* The set of Services associated with this Server.
*/
private Service services[] = new Service[0];
private final Object servicesLock = new Object();
/**
* The shutdown command string we are looking for.
*/
private String shutdown = "SHUTDOWN";
/**
* The string manager for this package.
*/
private static final StringManager sm =
StringManager.getManager(Constants.Package);
/**
* The property change support for this component.
*/
PropertyChangeSupport support = new PropertyChangeSupport(this);
private volatile boolean stopAwait = false;
private Catalina catalina = null;
private ClassLoader parentClassLoader = null;
/**
* Thread that currently is inside our await() method.
*/
private volatile Thread awaitThread = null;
/**
* Server socket that is used to wait for the shutdown command.
*/
private volatile ServerSocket awaitSocket = null;
// ------------------------------------------------------------- Properties
/**
* Return the global naming resources context.
*/
@Override
public javax.naming.Context getGlobalNamingContext() {
return (this.globalNamingContext);
}
/**
* Set the global naming resources context.
*
* @param globalNamingContext The new global naming resource context
*/
public void setGlobalNamingContext
(javax.naming.Context globalNamingContext) {
this.globalNamingContext = globalNamingContext;
}
/**
* Return the global naming resources.
*/
@Override
public NamingResources getGlobalNamingResources() {
return (this.globalNamingResources);
}
/**
* Set the global naming resources.
*
* @param globalNamingResources The new global naming resources
*/
@Override
public void setGlobalNamingResources
(NamingResources globalNamingResources) {
NamingResources oldGlobalNamingResources =
this.globalNamingResources;
this.globalNamingResources = globalNamingResources;
this.globalNamingResources.setContainer(this);
support.firePropertyChange("globalNamingResources",
oldGlobalNamingResources,
this.globalNamingResources);
}
/**
* Return descriptive information about this Server implementation and
* the corresponding version number, in the format
* <code><description>/<version></code>.
*/
@Override
public String getInfo() {
return (info);
}
/**
* Report the current Tomcat Server Release number
* @return Tomcat release identifier
*/
public String getServerInfo() {
return ServerInfo.getServerInfo();
}
/**
* Return the current server built timestamp
* @return server built timestamp.
*/
public String getServerBuilt() {
return ServerInfo.getServerBuilt();
}
/**
* Return the current server's version number.
* @return server's version number.
*/
public String getServerNumber() {
return ServerInfo.getServerNumber();
}
/**
* Return the port number we listen to for shutdown commands.
*/
@Override
public int getPort() {
return (this.port);
}
/**
* Set the port number we listen to for shutdown commands.
*
* @param port The new port number
*/
@Override
public void setPort(int port) {
this.port = port;
}
/**
* Return the address on which we listen to for shutdown commands.
*/
@Override
public String getAddress() {
return (this.address);
}
/**
* Set the address on which we listen to for shutdown commands.
*
* @param address The new address
*/
@Override
public void setAddress(String address) {
this.address = address;
}
/**
* Return the shutdown command string we are waiting for.
*/
@Override
public String getShutdown() {
return (this.shutdown);
}
/**
* Set the shutdown command we are waiting for.
*
* @param shutdown The new shutdown command
*/
@Override
public void setShutdown(String shutdown) {
this.shutdown = shutdown;
}
/**
* Return the outer Catalina startup/shutdown component if present.
*/
@Override
public Catalina getCatalina() {
return catalina;
}
/**
* Set the outer Catalina startup/shutdown component if present.
*/
@Override
public void setCatalina(Catalina catalina) {
this.catalina = catalina;
}
// --------------------------------------------------------- Server Methods
/**
* Add a new Service to the set of defined Services.
*
* @param service The Service to be added
*/
@Override
public void addService(Service service) {
service.setServer(this);
synchronized (servicesLock) {
Service results[] = new Service[services.length + 1];
System.arraycopy(services, 0, results, 0, services.length);
results[services.length] = service;
services = results;
if (getState().isAvailable()) {
try {
service.start();
} catch (LifecycleException e) {
// Ignore
}
}
// Report this property change to interested listeners
support.firePropertyChange("service", null, service);
}
}
public void stopAwait() {
stopAwait=true;
Thread t = awaitThread;
if (t != null) {
ServerSocket s = awaitSocket;
if (s != null) {
awaitSocket = null;
try {
s.close();
} catch (IOException e) {
// Ignored
}
}
t.interrupt();
try {
t.join(1000);
} catch (InterruptedException e) {
// Ignored
}
}
}
/**
* Wait until a proper shutdown command is received, then return.
* This keeps the main thread alive - the thread pool listening for http
* connections is daemon threads.
*/
@Override
public void await() {
// Negative values - don't wait on port - tomcat is embedded or we just don't like ports
if( port == -2 ) {
// undocumented yet - for embedding apps that are around, alive.
return;
}
if( port==-1 ) {
try {
awaitThread = Thread.currentThread();
while(!stopAwait) {
try {
Thread.sleep( 10000 );
} catch( InterruptedException ex ) {
// continue and check the flag
}
}
} finally {
awaitThread = null;
}
return;
}
// Set up a server socket to wait on
try {
awaitSocket = new ServerSocket(port, 1,
InetAddress.getByName(address));
} catch (IOException e) {
log.error("StandardServer.await: create[" + address
+ ":" + port
+ "]: ", e);
return;
}
try {
awaitThread = Thread.currentThread();
// Loop waiting for a connection and a valid command
while (!stopAwait) {
ServerSocket serverSocket = awaitSocket;
if (serverSocket == null) {
break;
}
// Wait for the next connection
Socket socket = null;
StringBuilder command = new StringBuilder();
try {
InputStream stream;
long acceptStartTime = System.currentTimeMillis();
try {
socket = serverSocket.accept();
socket.setSoTimeout(10 * 1000); // Ten seconds
stream = socket.getInputStream();
} catch (SocketTimeoutException ste) {
// This should never happen but bug 56684 suggests that
// it does.
log.warn(sm.getString("standardServer.accept.timeout",
Long.valueOf(System.currentTimeMillis() - acceptStartTime)), ste);
continue;
} catch (AccessControlException ace) {
log.warn("StandardServer.accept security exception: "
+ ace.getMessage(), ace);
continue;
} catch (IOException e) {
if (stopAwait) {
// Wait was aborted with socket.close()
break;
}
log.error("StandardServer.await: accept: ", e);
break;
}
// Read a set of characters from the socket
int expected = 1024; // Cut off to avoid DoS attack
while (expected < shutdown.length()) {
if (random == null)
random = new Random();
expected += (random.nextInt() % 1024);
}
while (expected > 0) {
int ch = -1;
try {
ch = stream.read();
} catch (IOException e) {
log.warn("StandardServer.await: read: ", e);
ch = -1;
}
// Control character or EOF (-1) terminates loop
if (ch < 32 || ch == 127) {
break;
}
command.append((char) ch);
expected--;
}
} finally {
// Close the socket now that we are done with it
try {
if (socket != null) {
socket.close();
}
} catch (IOException e) {
// Ignore
}
}
// Match against our command string
boolean match = command.toString().equals(shutdown);
if (match) {
log.info(sm.getString("standardServer.shutdownViaPort"));
break;
} else
log.warn("StandardServer.await: Invalid command '"
+ command.toString() + "' received");
}
} finally {
ServerSocket serverSocket = awaitSocket;
awaitThread = null;
awaitSocket = null;
// Close the server socket and return
if (serverSocket != null) {
try {
serverSocket.close();
} catch (IOException e) {
// Ignore
}
}
}
}
/**
* Return the specified Service (if it exists); otherwise return
* <code>null</code>.
*
* @param name Name of the Service to be returned
*/
@Override
public Service findService(String name) {
if (name == null) {
return (null);
}
synchronized (servicesLock) {
for (int i = 0; i < services.length; i++) {
if (name.equals(services[i].getName())) {
return (services[i]);
}
}
}
return (null);
}
/**
* Return the set of Services defined within this Server.
*/
@Override
public Service[] findServices() {
return (services);
}
/**
* Return the JMX service names.
*/
public ObjectName[] getServiceNames() {
ObjectName onames[]=new ObjectName[ services.length ];
for( int i=0; i<services.length; i++ ) {
onames[i]=((StandardService)services[i]).getObjectName();
}
return onames;
}
/**
* Remove the specified Service from the set associated from this
* Server.
*
* @param service The Service to be removed
*/
@Override
public void removeService(Service service) {
synchronized (servicesLock) {
int j = -1;
for (int i = 0; i < services.length; i++) {
if (service == services[i]) {
j = i;
break;
}
}
if (j < 0)
return;
try {
services[j].stop();
} catch (LifecycleException e) {
// Ignore
}
int k = 0;
Service results[] = new Service[services.length - 1];
for (int i = 0; i < services.length; i++) {
if (i != j)
results[k++] = services[i];
}
services = results;
// Report this property change to interested listeners
support.firePropertyChange("service", service, null);
}
}
// --------------------------------------------------------- Public Methods
/**
* Add a property change listener to this component.
*
* @param listener The listener to add
*/
public void addPropertyChangeListener(PropertyChangeListener listener) {
support.addPropertyChangeListener(listener);
}
/**
* Remove a property change listener from this component.
*
* @param listener The listener to remove
*/
public void removePropertyChangeListener(PropertyChangeListener listener) {
support.removePropertyChangeListener(listener);
}
/**
* Return a String representation of this component.
*/
@Override
public String toString() {
StringBuilder sb = new StringBuilder("StandardServer[");
sb.append(getPort());
sb.append("]");
return (sb.toString());
}
/**
* Write the configuration information for this entire <code>Server</code>
* out to the server.xml configuration file.
*
* @exception javax.management.InstanceNotFoundException
* if the managed resource object cannot be found
* @exception javax.management.MBeanException
* if the initializer of the object throws an exception, or
* persistence is not supported
* @exception javax.management.RuntimeOperationsException
* if an exception is reported by the persistence mechanism
*/
public synchronized void storeConfig() throws Exception {
ObjectName sname = new ObjectName("Catalina:type=StoreConfig");
mserver.invoke(sname, "storeConfig", null, null);
}
/**
* Write the configuration information for <code>Context</code>
* out to the specified configuration file.
*
* @exception javax.management.InstanceNotFoundException if the managed resource object
* cannot be found
* @exception javax.management.MBeanException if the initializer of the object throws
* an exception, or persistence is not supported
* @exception javax.management.RuntimeOperationsException if an exception is reported
* by the persistence mechanism
*/
public synchronized void storeContext(Context context) throws Exception {
ObjectName sname = null;
try {
sname = new ObjectName("Catalina:type=StoreConfig");
if(mserver.isRegistered(sname)) {
mserver.invoke(sname, "store",
new Object[] {context},
new String [] { "java.lang.String"});
} else
log.error("StoreConfig mbean not registered" + sname);
} catch (Throwable t) {
ExceptionUtils.handleThrowable(t);
log.error(t);
}
}
/**
* Return true if naming should be used.
*/
private boolean isUseNaming() {
boolean useNaming = true;
// Reading the "catalina.useNaming" environment variable
String useNamingProperty = System.getProperty("catalina.useNaming");
if ((useNamingProperty != null)
&& (useNamingProperty.equals("false"))) {
useNaming = false;
}
return useNaming;
}
/**
* Start nested components ({@link Service}s) 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 void startInternal() throws LifecycleException {
fireLifecycleEvent(CONFIGURE_START_EVENT, null);
setState(LifecycleState.STARTING);
globalNamingResources.start();
// Start our defined Services
synchronized (servicesLock) {
for (int i = 0; i < services.length; i++) {
services[i].start();
}
}
}
/**
* Stop nested components ({@link Service}s) and implement the requirements
* of {@link org.apache.catalina.util.LifecycleBase#stopInternal()}.
*
* @exception LifecycleException if this component detects a fatal error
* that needs to be reported
*/
@Override
protected void stopInternal() throws LifecycleException {
setState(LifecycleState.STOPPING);
fireLifecycleEvent(CONFIGURE_STOP_EVENT, null);
// Stop our defined Services
for (int i = 0; i < services.length; i++) {
services[i].stop();
}
globalNamingResources.stop();
stopAwait();
}
/**
* Invoke a pre-startup initialization. This is used to allow connectors
* to bind to restricted ports under Unix operating environments.
*/
@Override
protected void initInternal() throws LifecycleException {
super.initInternal();
// Register global String cache
// Note although the cache is global, if there are multiple Servers
// present in the JVM (may happen when embedding) then the same cache
// will be registered under multiple names
onameStringCache = register(new StringCache(), "type=StringCache");
// Register the MBeanFactory
MBeanFactory factory = new MBeanFactory();
factory.setContainer(this);
onameMBeanFactory = register(factory, "type=MBeanFactory");
// Register the naming resources
globalNamingResources.init();
// Populate the extension validator with JARs from common and shared
// class loaders
if (getCatalina() != null) {
ClassLoader cl = getCatalina().getParentClassLoader();
// Walk the class loader hierarchy. Stop at the system class loader.
// This will add the shared (if present) and common class loaders
while (cl != null && cl != ClassLoader.getSystemClassLoader()) {
if (cl instanceof URLClassLoader) {
URL[] urls = ((URLClassLoader) cl).getURLs();
for (URL url : urls) {
if (url.getProtocol().equals("file")) {
try {
File f = new File (url.toURI());
if (f.isFile() &&
f.getName().endsWith(".jar")) {
ExtensionValidator.addSystemResource(f);
}
} catch (URISyntaxException e) {
// Ignore
} catch (IOException e) {
// Ignore
}
}
}
}
cl = cl.getParent();
}
}
// Initialize our defined Services
for (int i = 0; i < services.length; i++) {
services[i].init();
}
}
@Override
protected void destroyInternal() throws LifecycleException {
// Destroy our defined Services
for (int i = 0; i < services.length; i++) {
services[i].destroy();
}
globalNamingResources.destroy();
unregister(onameMBeanFactory);
unregister(onameStringCache);
super.destroyInternal();
}
/**
* Return the parent class loader for this component.
*/
@Override
public ClassLoader getParentClassLoader() {
if (parentClassLoader != null)
return (parentClassLoader);
if (catalina != null) {
return (catalina.getParentClassLoader());
}
return (ClassLoader.getSystemClassLoader());
}
/**
* Set the parent class loader for this server.
*
* @param parent The new parent class loader
*/
@Override
public void setParentClassLoader(ClassLoader parent) {
ClassLoader oldParentClassLoader = this.parentClassLoader;
this.parentClassLoader = parent;
support.firePropertyChange("parentClassLoader", oldParentClassLoader,
this.parentClassLoader);
}
private ObjectName onameStringCache;
private ObjectName onameMBeanFactory;
/**
* Obtain the MBean domain for this server. The domain is obtained using
* the following search order:
* <ol>
* <li>Name of first {@link org.apache.catalina.Engine}.</li>
* <li>Name of first {@link Service}.</li>
* </ol>
*/
@Override
protected String getDomainInternal() {
String domain = null;
Service[] services = findServices();
if (services.length > 0) {
Service service = services[0];
if (service != null) {
domain = MBeanUtils.getDomain(service);
}
}
return domain;
}
@Override
protected final String getObjectNameKeyProperties() {
return "type=Server";
}
}