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package com.sun.appserv.server.util;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.*;
import com.sun.enterprise.config.ConfigContext;
import com.sun.enterprise.config.ConfigException;
import com.sun.enterprise.config.serverbeans.Applications;
import com.sun.enterprise.config.serverbeans.Domain;
import com.sun.enterprise.config.serverbeans.EjbModule;
import com.sun.enterprise.config.serverbeans.J2eeApplication;
import com.sun.enterprise.config.serverbeans.WebModule;
import com.sun.enterprise.server.ApplicationServer;
import com.sun.enterprise.server.PELaunch;
import com.sun.enterprise.util.SystemPropertyConstants;
public class ASClassLoaderUtil {
private static final Logger _logger = Logger.getAnonymousLogger();
private static String sharedClasspathForWebModule = null;
/**
* Gets the classpath associated with a web module, suffixing libraries defined
* [if any] for the application
* @param moduleId Module id of the web module
* @return A <code>File.pathSeparator</code> separated list of classpaths
* for the passed in web module, including the module specified "libraries"
* defined for the web module.
*/
public static String getWebModuleClassPath(String moduleId) {
if (_logger.isLoggable(Level.FINE)) {
_logger.log(Level.FINE, "ASClassLoaderUtil.getWebModuleClassPath " +
"for module Id : " + moduleId);
}
synchronized(ASClassLoaderUtil.class) {
if (sharedClasspathForWebModule == null) {
final StringBuilder tmpString = new StringBuilder();
if (Boolean.getBoolean(PELaunch.USE_NEW_CLASSLOADER_PROPERTY)) {
final List<String> tmpList = new ArrayList<String>();
tmpList.addAll(PELaunch.getSharedClasspath());
//include addon jars as well now that they are not part of shared classpath.
tmpList.addAll(PELaunch.getAddOnsClasspath());
for(final String s:tmpList){
tmpString.append(s);
tmpString.append(File.pathSeparatorChar);
}
} else {
tmpString.append(System.getProperty("java.class.path"));
}
//set sharedClasspathForWebModule so that it doesn't need to be recomputed
//for every other invocation
sharedClasspathForWebModule = tmpString.toString();
}
}
StringBuilder classpath = new StringBuilder(sharedClasspathForWebModule);
if (moduleId != null) {
final String specifiedLibraries = getLibrariesForWebModule(moduleId);
final URL[] libs = getLibraries(specifiedLibraries);
if (libs == null) {
if (_logger.isLoggable(Level.FINE)) {
_logger.log(Level.FINE, "classpath: " + classpath.toString());
}
return classpath.toString();
}
for (final URL u : libs) {
classpath.append(u + File.pathSeparator);
}
}
if (_logger.isLoggable(Level.FINE)) {
_logger.log(Level.FINE, "Final classpath: " + classpath.toString());
}
return classpath.toString();
}
/**
* Gets the deploy-time "libraries" attribute specified for a J2EE application (.ear file)
* @param moduleId The module id of the J2EE application
* @return A comma separated list representing the libraries
* specified by the deployer.
*/
public static String getLibrariesForJ2EEApplication(String moduleId) {
J2eeApplication app = null;
try {
app = getApplications().getJ2eeApplicationByName(moduleId);
if(app == null) return null;
} catch(ConfigException malEx) {
_logger.log(Level.WARNING, "loader.cannot_convert_classpath_into_url",
moduleId);
_logger.log(Level.WARNING,"loader.exception", malEx);
}
return app.getLibraries();
}
/**
* Gets the deploy-time "libraries" attribute specified for a web module (.war file)
* @param moduleId The module id of the web module
* @return A comma separated list representing the libraries
* specified by the deployer.
*/
public static String getLibrariesForWebModule(String moduleId) {
WebModule app = null;
try {
app = getApplications().getWebModuleByName(moduleId);
if(app == null) return null;
} catch(ConfigException malEx) {
_logger.log(Level.WARNING, "loader.cannot_convert_classpath_into_url",
moduleId);
_logger.log(Level.WARNING,"loader.exception", malEx);
}
String librariesStr = app.getLibraries();
if (_logger.isLoggable(Level.FINE)) {
_logger.log(Level.FINE, "app = " + app + " library = " + librariesStr);
}
return librariesStr;
}
/**
* Gets the deploy-time "libraries" attribute specified for an EJB module [EJB Jars]
* @param moduleId The module id of the EJB module
* @return A comma separated list representing the libraries
* specified by the deployer.
*/
public static String getLibrariesForEJBJars(String moduleId) {
EjbModule app = null;
try {
app = getApplications().getEjbModuleByName(moduleId);
if(app == null) return null;
} catch(ConfigException malEx) {
_logger.log(Level.WARNING, "loader.cannot_convert_classpath_into_url",
moduleId);
_logger.log(Level.WARNING,"loader.exception", malEx);
}
return app.getLibraries();
}
//Gets the Applications config bean from the application server's configcontext
private static Applications getApplications() throws ConfigException {
ConfigContext serverConfigCtx = ApplicationServer.getServerContext().getConfigContext();
Domain domain = ((Domain)serverConfigCtx.getRootConfigBean());
return domain.getApplications();
}
/**
* Utility method to obtain a resolved list of URLs representing the
* libraries specified for an application using the libraries
* application deploy-time attribute
* @param librariesStr The deploy-time libraries attribute as specified by
* the deployer for an application
* @return A list of URLs representing the libraries specified for
* the application
*/
public static URL[] getLibraries(String librariesStr) {
if(librariesStr == null)
return null;
String [] librariesStrArray = librariesStr.split(",");
if(librariesStrArray == null)
return null;
final URL [] urls = new URL[librariesStrArray.length];
//Using the string from lib and applibs requires admin which is
//built after appserv-core.
final String appLibsDir = System.getProperty(
SystemPropertyConstants.INSTANCE_ROOT_PROPERTY)
+ File.separator + "lib"
+ File.separator + "applibs";
int i=0;
for(final String libraryStr:librariesStrArray){
try {
File f = new File(libraryStr);
if(!f.isAbsolute())
f = new File(appLibsDir, libraryStr);
URL url = f.toURL();
urls[i++] = url;
} catch (MalformedURLException malEx) {
_logger.log(Level.WARNING,
"loader.cannot_convert_classpath_into_url",
libraryStr);
_logger.log(Level.WARNING,"loader.exception", malEx);
}
}
return urls;
}
/**
* Returns the shared class loader
* @return ClassLoader
*/
public static synchronized ClassLoader getSharedClassLoader() {
return ApplicationServer.getServerContext().getSharedClassLoader();
}
}
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