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package com.sun.enterprise.admin.wsmgmt.repository.impl.cache;
import java.util.List;
import java.util.Map;
import java.util.HashMap;
import java.util.Properties;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.File;
import java.util.Collection;
import java.util.Iterator;
import java.util.Enumeration;
import com.sun.enterprise.util.SystemPropertyConstants;
import com.sun.enterprise.admin.servermgmt.pe.PEFileLayout;
import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.logging.LogDomains;
/**
* Responsible for keeping track of the deployed applications and stand
* alone ejb and web modules with web services. This is a singleton for
* the domain. This class is intended to run on the Administration Server.
*
* @author Nazrul Islam
* @since J2SE 5.0
*/
public class CacheMgr {
/**
* Returns the singleton instance of this class.
*
* @return sigleton instance of this class
*/
public static synchronized CacheMgr getInstance() {
if (_mgr == null) {
_mgr = new CacheMgr();
}
return _mgr;
}
/**
* Private constructor. Loads the cache index from the persistent store.
*/
private CacheMgr() {
load();
}
/**
* Returns the persistent cache index location.
*
* @return the persistent cache file location
*/
private String getPropertyFile() {
String iRoot =
System.getProperty(SystemPropertyConstants.INSTANCE_ROOT_PROPERTY);
String file = iRoot + File.separator + PEFileLayout.GENERATED_DIR
+ File.separator + CACHE_FILE;
return file;
}
/**
* Saves the current in memory cache indexes to a property file.
*/
void save() {
FileOutputStream fos = null;
try {
Properties pro = new Properties();
Collection eValues = _ejbModules.values();
for (Iterator iter=eValues.iterator(); iter.hasNext();) {
String ejbMod = (String) iter.next();
pro.put(ejbMod, EJB);
}
Collection wValues = _webModules.values();
for (Iterator iter=wValues.iterator(); iter.hasNext();) {
String webMod = (String) iter.next();
pro.put(webMod, WEB);
}
Collection aValues = _j2eeApplications.values();
for (Iterator iter=aValues.iterator(); iter.hasNext();) {
J2eeApplication app = (J2eeApplication) iter.next();
pro.put(app.getName(), app.getPersistentValue());
}
File file = new File(getPropertyFile());
fos = new FileOutputStream(file);
pro.store(fos, "");
} catch (Exception e) {
_logger.log(Level.FINE, "Error while saving ws-mgmt cache file", e);
} finally {
if (fos != null) {
try {
fos.close();
} catch (Exception e) { }
}
}
}
/**
* Reads from the persistent cache index property file.
*/
private void load() {
FileInputStream fis = null;
try {
File file = new File(getPropertyFile());
// abort if file does not exist
if (!file.exists()) {
return;
}
fis = new FileInputStream(file);
Properties pro = new Properties();
pro.load(fis);
for (Enumeration e = pro.keys(); e.hasMoreElements();) {
String key = (String) e.nextElement();
String val = pro.getProperty(key);
if (EJB.equals(val)) {
_ejbModules.put(key, key);
} else if (WEB.equals(val)) {
_webModules.put(key, key);
} else {
J2eeApplication app = new J2eeApplication(key, val);
_j2eeApplications.put(key, app);
}
}
} catch (Exception e) {
_logger.log(Level.FINE,
"Error while loading ws-mgmt cache file", e);
} finally {
if (fis != null) {
try {
fis.close();
} catch (Exception e) { }
}
}
}
/**
* Adds an application to the cache.
*
* @param name name of the application
* @param ejbBundles ejb bundles with web services
* @param webBundles web bundles with web services
*/
void addJ2eeApplication(String name, List ejbBundles, List webBundles) {
J2eeApplication app = new J2eeApplication(name, ejbBundles, webBundles);
_j2eeApplications.put(name, app);
}
/**
* Removes an application from the cache.
*
* @param name name of the application
*/
J2eeApplication removeJ2eeApplication(String name) {
return (J2eeApplication) _j2eeApplications.remove(name);
}
/**
* Returns all j2ee applications with web services.
*
* @return j2ee applications with web services
*/
public Map getJ2eeApplications() {
return _j2eeApplications;
}
/**
* Returns all stand alone ejb modules with web services.
*
* @return stand alone ejb module with web services
*/
public Map getEjbModules() {
return _ejbModules;
}
/**
* Adds an ejb module to the cache.
*
* @param name name of the stand alone ejb module with web services
*/
void addEjbModule(String name) {
_ejbModules.put(name, name);
}
/**
* Removes an ejb module from cache.
*
* @param name name of the stand alone ejb module
*/
String removeEjbModule(String name) {
return (String) _ejbModules.remove(name);
}
/**
* Returns all stand alone web apps with web services.
*
* @return web apps with web services
*/
public Map getWebModules() {
return _webModules;
}
/**
* Adds a web module to the cache.
*
* @param name name of the stand alone web module with web services
*/
void addWebModule(String name) {
_webModules.put(name, name);
}
/**
* Removes a web module from cache.
*
* @param name name of the stand alone web module
*/
String removeWebModule(String name) {
return (String) _webModules.remove(name);
}
// ---- VARIABLES - PRIVATE -----------------------------
private static CacheMgr _mgr = null;
private Map _j2eeApplications = new HashMap();
private Map _ejbModules = new HashMap();
private Map _webModules = new HashMap();
private static final String EJB = "EJB_MODULE";
private static final String WEB = "WEB_MODULE";
private static final String CACHE_FILE = ".com_sun_appserv_wsindex";
private static Logger _logger = Logger.getLogger(LogDomains.ADMIN_LOGGER);
}
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