Glassfish example source code file (MapperListener.java)
The Glassfish MapperListener.java source code/*
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package org.apache.catalina.connector;
import com.sun.grizzly.util.buf.MessageBytes;
import com.sun.grizzly.util.http.mapper.Mapper;
import com.sun.grizzly.util.http.mapper.MappingData;
import org.apache.catalina.Host;
import org.apache.catalina.core.StandardContext;
import org.apache.catalina.core.StandardHost;
import org.apache.catalina.core.StandardWrapper;
import org.apache.catalina.util.RequestUtil;
import org.apache.catalina.util.StringManager;
import org.apache.tomcat.util.modeler.Registry;
import javax.management.*;
import java.util.Iterator;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Mapper listener.
*
* @author Remy Maucherat
* @author Costin Manolache
*/
public class MapperListener
/* SJSAS 6313044
implements NotificationListener
*/
// START SJSAS 6313044
implements NotificationListener, NotificationFilter
// END SJSAS 6313044
{
private static Logger log = Logger.getLogger(MapperListener.class.getName());
// ----------------------------------------------------- Instance Variables
/**
* Associated mapper.
*/
protected Mapper mapper = null;
/**
* MBean server.
*/
protected MBeanServer mBeanServer = null;
/**
* The string manager for this package.
*/
private static final StringManager sm =
StringManager.getManager(Constants.Package);
// It should be null - and fail if not set
private String domain="*";
private String engine="*";
// BEGIN S1AS 5000999
private String networkListenerName;
private String defaultHost;
private ConcurrentHashMap<ObjectName,String[]> virtualServerListenerNames;
// END S1AS 5000999
// START SJSAS 6313044
private String myInstance;
// END SJSAS 6313044
// ----------------------------------------------------------- Constructors
/**
* Create mapper listener.
*/
public MapperListener(Mapper mapper) {
this.mapper = mapper;
virtualServerListenerNames = new ConcurrentHashMap<ObjectName,String[]>();
}
// --------------------------------------------------------- Public Methods
public String getDomain() {
return domain;
}
public void setDomain(String domain) {
this.domain = domain;
}
public String getEngine() {
return engine;
}
public void setEngine(String engine) {
this.engine = engine;
}
// BEGIN S1AS 5000999
public String getNetworkListenerName() {
return networkListenerName;
}
public void setNetworkListenerName(String networkListenerName) {
this.networkListenerName = networkListenerName;
}
public void setInstanceName(String instanceName) {
myInstance = instanceName;
}
public String getDefaultHost() {
return defaultHost;
}
public void setDefaultHost(String defaultHost) {
this.defaultHost = defaultHost;
}
// END S1AS 5000999
/**
* Initialize associated mapper.
*/
public void init() {
if (defaultHost != null) {
mapper.setDefaultHostName(defaultHost);
}
try {
mBeanServer = Registry.getRegistry(null, null).getMBeanServer();
// Query hosts
String onStr = domain + ":type=Host,*";
ObjectName objectName = new ObjectName(onStr);
Set set = mBeanServer.queryMBeans(objectName, null);
Iterator iterator = set.iterator();
while (iterator.hasNext()) {
ObjectInstance oi = (ObjectInstance) iterator.next();
registerHost(oi.getObjectName());
}
// Query contexts
onStr = domain + ":j2eeType=WebModule,*,J2EEServer=" + myInstance;
objectName = new ObjectName(onStr);
set = mBeanServer.queryMBeans(objectName, null);
iterator = set.iterator();
while (iterator.hasNext()) {
ObjectInstance oi = (ObjectInstance) iterator.next();
registerContext(oi.getObjectName());
}
// Query wrappers
onStr = domain + ":j2eeType=Servlet,*,J2EEServer=" + myInstance;
objectName = new ObjectName(onStr);
set = mBeanServer.queryMBeans(objectName, null);
iterator = set.iterator();
while (iterator.hasNext()) {
ObjectInstance oi = (ObjectInstance) iterator.next();
registerWrapper(oi.getObjectName());
}
onStr = "JMImplementation:type=MBeanServerDelegate";
objectName = new ObjectName(onStr);
/* SJSAS 6313044
mBeanServer.addNotificationListener(objectName, this, null, null);
*/
// START SJSAS 6313044
mBeanServer.addNotificationListener(objectName, this, this, null);
// END SJSAS 6313044
} catch (Exception e) {
log.log(Level.WARNING, "Error registering contexts", e);
}
}
// START SJSAS 6313044
// ------------------------------------------ NotificationFilter Methods
/**
* Filters out any notifications corresponding to MBeans belonging to
* a different server instance than the server instance on which this
* MapperListener is running.
*
* @param notification The notification to be examined
*
* @return true if the notification needs to be sent to this
* MapperListener, false otherwise.
*/
public boolean isNotificationEnabled(Notification notification) {
if (notification instanceof MBeanServerNotification) {
ObjectName objectName =
((MBeanServerNotification) notification).getMBeanName();
String otherDomain = objectName.getDomain();
if (this.domain != null && !(this.domain.equals(otherDomain))) {
return false;
}
String otherInstance = objectName.getKeyProperty("J2EEServer");
if (myInstance != null && otherInstance != null
&& !otherInstance.equals(myInstance)) {
return false;
}
}
return true;
}
// END SJSAS 6313044
// ------------------------------------------- NotificationListener Methods
public void handleNotification(Notification notification,
java.lang.Object handback) {
if (notification instanceof MBeanServerNotification) {
ObjectName objectName =
((MBeanServerNotification) notification).getMBeanName();
String j2eeType = objectName.getKeyProperty("j2eeType");
String engineName = null;
if (j2eeType != null) {
if ((j2eeType.equals("WebModule")) ||
(j2eeType.equals("Servlet"))) {
if (mBeanServer.isRegistered(objectName)) {
/* SJSAS 6290785
try {
engineName = (String)
mBeanServer.getAttribute(objectName, "engineName");
} catch (Exception e) {
// Ignore
}
*/
// START SJSAS 6290785
MBeanInfo info = null;
try {
info = mBeanServer.getMBeanInfo(objectName);
} catch (Exception e) {
// Ignore
}
if (info != null) {
boolean hasEngineNameAttribute = false;
MBeanAttributeInfo[] attrInfo = info.getAttributes();
if (attrInfo != null) {
for (int i=0; i<attrInfo.length; i++) {
if ("engineName".equals(
attrInfo[i].getName())) {
hasEngineNameAttribute = true;
break;
}
}
}
if (hasEngineNameAttribute) {
try {
engineName = (String)
mBeanServer.getAttribute(objectName,
"engineName");
} catch (Exception e) {
// Ignore
}
}
}
// END SJSAS 6290785
}
}
}
// At deployment time, engineName is always = null.
if ( (!"*".equals(domain)) &&
( !domain.equals(objectName.getDomain()) ) &&
( (!domain.equals(engineName) ) &&
(engineName != null) ) ) {
return;
}
if (log.isLoggable(Level.FINE)) {
log.fine( "Handle " + objectName );
}
if (notification.getType().equals
(MBeanServerNotification.REGISTRATION_NOTIFICATION)) {
String type=objectName.getKeyProperty("type");
if( "Host".equals( type )) {
try {
registerHost(objectName);
} catch (Exception e) {
log.log(Level.WARNING,
"Error registering Host " + objectName, e);
}
}
if (j2eeType != null) {
if (j2eeType.equals("WebModule")) {
try {
registerContext(objectName);
} catch (Throwable t) {
log.log(Level.WARNING,
"Error registering Context " + objectName,
t);
}
} else if (j2eeType.equals("Servlet")) {
try {
registerWrapper(objectName);
} catch (Throwable t) {
log.log(Level.WARNING,
"Error registering Wrapper " + objectName,
t);
}
}
}
} else if (notification.getType().equals
(MBeanServerNotification.UNREGISTRATION_NOTIFICATION)) {
String type=objectName.getKeyProperty("type");
if( "Host".equals( type )) {
try {
unregisterHost(objectName);
} catch (Exception e) {
log.log(Level.WARNING,
"Error unregistering Host " + objectName,
e);
}
}
if (j2eeType != null) {
if (j2eeType.equals("WebModule")) {
try {
unregisterContext(objectName);
} catch (Throwable t) {
log.log(Level.WARNING,
"Error unregistering webapp " + objectName,
t);
}
} else if (Boolean.parseBoolean(objectName.getKeyProperty("osgi")) &&
j2eeType.equals("Servlet")) {
try {
unregisterOSGiWrapper(objectName);
} catch (Throwable t) {
log.log(Level.WARNING,
"Error unregistering osgi wrapper " + objectName,
t);
}
}
}
}
}
}
// ------------------------------------------------------ Protected Methods
private void registerEngine()
throws Exception
{
ObjectName engineName = new ObjectName
(domain + ":type=Engine");
if ( ! mBeanServer.isRegistered(engineName)) return;
// BEGIN S1AS 5000999
/*
String defaultHost =
(String) mBeanServer.getAttribute(engineName, "defaultHost");
*/
if (defaultHost == null) {
defaultHost =
(String) mBeanServer.getAttribute(engineName, "defaultHost");
}
// END S1AS 5000999
ObjectName hostName = new ObjectName
(domain + ":type=Host," + "host=" + defaultHost);
if (!mBeanServer.isRegistered(hostName)) {
// Get the hosts' list
String onStr = domain + ":type=Host,*";
ObjectName objectName = new ObjectName(onStr);
Set set = mBeanServer.queryMBeans(objectName, null);
Iterator iterator = set.iterator();
String[] aliases;
boolean isRegisteredWithAlias = false;
while (iterator.hasNext()) {
if (isRegisteredWithAlias) break;
ObjectInstance oi = (ObjectInstance) iterator.next();
hostName = oi.getObjectName();
aliases = (String[])
mBeanServer.invoke(hostName, "findAliases", null, null);
for (int i=0; i < aliases.length; i++){
if (aliases[i].equalsIgnoreCase(defaultHost)){
isRegisteredWithAlias = true;
break;
}
}
}
if (!isRegisteredWithAlias)
log.warning("Unknown default host: " + defaultHost);
}
// This should probably be called later
if( defaultHost != null ) {
mapper.setDefaultHostName(defaultHost);
}
}
/**
* Register host.
*/
public void registerHost(ObjectName objectName)
throws Exception {
String name=objectName.getKeyProperty("host");
if( name != null ) {
Host host = (Host) mBeanServer.invoke(objectName,
"findMappingObject",
null,
null);
if (host == null) {
throw new Exception("No host registered for " + objectName);
}
// BEGIN S1AS 5000999
/*
* Register the given Host only if one of its associated network listener
* names matches the network listener name of this MapperListener
*/
String[] nlNames = ((StandardHost) host).getNetworkListenerNames();
boolean nameMatch = false;
if (nlNames != null) {
for (String nlName : nlNames) {
if (nlName.equals(this.networkListenerName)) {
nameMatch = true;
break;
}
}
}
if (!nameMatch) {
if (log.isLoggable(Level.FINE)) {
log.fine("HTTP listener with network listener name " + networkListenerName
+ " ignoring registration of host with object "
+ "name " + objectName + ", because none of the "
+ "host's associated HTTP listeners matches "
+ "this network listener name");
}
return;
}
if (nlNames != null) {
virtualServerListenerNames.put(objectName, nlNames);
}
// END S1AS 5000999
String[] aliases = host.findAliases();
mapper.addHost(name, aliases, host);
}
}
/**
* Unregister host.
*/
public void unregisterHost(ObjectName objectName)
throws Exception {
String name=objectName.getKeyProperty("host");
// BEGIN S1AS 5000999
if (name != null) {
String[] nlNames = virtualServerListenerNames.get(objectName);
boolean nameMatch = false;
if (nlNames != null) {
virtualServerListenerNames.remove(objectName);
for (String nlName : nlNames) {
if (nlName.equals(this.networkListenerName)) {
nameMatch = true;
break;
}
}
}
if (!nameMatch) {
return;
}
}
// END S1AS 5000999
mapper.removeHost(name);
}
/**
* Register context.
*/
private void registerContext(ObjectName objectName)
throws Exception {
StandardContext context = (StandardContext)
mBeanServer.invoke(objectName, "findMappingObject", null, null);
if (context == null) {
throw new Exception("No context registered for " + objectName);
}
String name = objectName.getKeyProperty("name");
// If the domain is the same with ours or the engine
// name attribute is the same... - then it's ours
String targetDomain=objectName.getDomain();
if( ! domain.equals( targetDomain )) {
targetDomain = context.getEngineName();
if( ! domain.equals( targetDomain )) {
// not ours
return;
}
}
String hostName = null;
String contextName = null;
if (name.startsWith("//")) {
name = name.substring(2);
}
int slash = name.indexOf("/");
if (slash != -1) {
hostName = name.substring(0, slash);
contextName = name.substring(slash);
contextName = RequestUtil.urlDecode(contextName , "UTF-8");
} else {
return;
}
// Special case for the root context
if (contextName.equals("/")) {
contextName = "";
}
if (log.isLoggable(Level.FINE)) {
log.fine(sm.getString("mapperListener.registerContext",
contextName));
}
javax.naming.Context resources = context.findStaticResources();
String[] welcomeFiles = context.getWelcomeFiles();
mapper.addContext(hostName, contextName, context,
welcomeFiles, resources,
context.getAlternateDocBases());
}
/**
* Unregister context.
*/
private void unregisterContext(ObjectName objectName)
throws Exception {
String name = objectName.getKeyProperty("name");
String hostName = null;
String contextName = null;
if (name.startsWith("//")) {
name = name.substring(2);
}
int slash = name.indexOf("/");
if (slash != -1) {
hostName = name.substring(0, slash);
contextName = name.substring(slash);
contextName = RequestUtil.urlDecode(contextName , "UTF-8");
} else {
return;
}
// Special case for the root context
if (contextName.equals("/")) {
contextName = "";
}
// Don't un-map a context that is paused
MessageBytes hostMB = MessageBytes.newInstance();
hostMB.setString(hostName);
MessageBytes contextMB = MessageBytes.newInstance();
contextMB.setString(contextName);
MappingData mappingData = new MappingData();
mapper.map(hostMB, contextMB, mappingData);
if (mappingData.context instanceof StandardContext &&
((StandardContext)mappingData.context).getPaused()) {
return;
}
if (log.isLoggable(Level.FINE)) {
log.fine(sm.getString("mapperListener.unregisterContext",
contextName));
}
mapper.removeContext(hostName, contextName);
}
/**
* Register wrapper.
*/
private void registerWrapper(ObjectName objectName)
throws Exception {
StandardWrapper wrapper = (StandardWrapper)
mBeanServer.invoke(objectName, "findMappingObject", null, null);
if (wrapper == null) {
throw new Exception("No wrapper registered for " + objectName);
}
// If the domain is the same with ours or the engine
// name attribute is the same... - then it's ours
String targetDomain=objectName.getDomain();
if( ! domain.equals( targetDomain )) {
targetDomain= wrapper.getEngineName();
if( ! domain.equals( targetDomain )) {
// not ours
return;
}
}
String wrapperName = objectName.getKeyProperty("name");
String name = objectName.getKeyProperty("WebModule");
String hostName = null;
String contextName = null;
if (name.startsWith("//")) {
name = name.substring(2);
}
int slash = name.indexOf("/");
if (slash != -1) {
hostName = name.substring(0, slash);
contextName = name.substring(slash);
contextName = RequestUtil.urlDecode(contextName , "UTF-8");
} else {
return;
}
// Special case for the root context
if (contextName.equals("/")) {
contextName = "";
}
if (log.isLoggable(Level.FINE)) {
log.fine(sm.getString("mapperListener.registerWrapper",
wrapperName, contextName));
}
String[] mappings = wrapper.findMappings();
for (int i = 0; i < mappings.length; i++) {
boolean jspWildCard = (wrapperName.equals("jsp")
&& mappings[i].endsWith("/*"));
mapper.addWrapper(hostName, contextName, mappings[i], wrapper,
jspWildCard, wrapperName, true);
}
}
/**
* Unregister wrapper.
*/
private void unregisterOSGiWrapper(ObjectName objectName)
throws Exception {
// If the domain is the same with ours or the engine
// name attribute is the same... - then it's ours
String targetDomain=objectName.getDomain();
if( ! domain.equals( targetDomain )) {
return;
}
String name = objectName.getKeyProperty("WebModule");
String hostName = null;
String contextName = null;
if (name.startsWith("//")) {
name = name.substring(2);
}
int slash = name.indexOf("/");
if (slash != -1) {
hostName = name.substring(0, slash);
contextName = name.substring(slash);
contextName = RequestUtil.urlDecode(contextName , "UTF-8");
} else {
return;
}
// Special case for the root context
if (contextName.equals("/")) {
contextName = "";
}
String mapping = objectName.getKeyProperty("name");
if ("/".equals(mapping)) {
mapping = "/*";
} else {
mapping += "/*";
}
mapper.removeWrapper(hostName, contextName, mapping);
}
}
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