/*
* The MIT License
*
* Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi, Jean-Baptiste Quenot, Tom Huybrechts
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package hudson;
import com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider;
import com.thoughtworks.xstream.core.JVM;
import hudson.model.Hudson;
import hudson.model.User;
import hudson.stapler.WebAppController;
import hudson.stapler.WebAppController.DefaultInstallStrategy;
import hudson.triggers.SafeTimerTask;
import hudson.triggers.Trigger;
import hudson.util.HudsonIsLoading;
import hudson.util.IncompatibleServletVersionDetected;
import hudson.util.IncompatibleVMDetected;
import hudson.util.InsufficientPermissionDetected;
import hudson.util.NoHomeDir;
import hudson.util.RingBufferLogHandler;
import hudson.util.NoTempDir;
import hudson.util.IncompatibleAntVersionDetected;
import hudson.util.HudsonFailedToLoad;
import hudson.util.ChartUtil;
import hudson.util.AWTProblem;
import org.jvnet.localizer.LocaleProvider;
import org.kohsuke.stapler.Stapler;
import org.kohsuke.stapler.StaplerRequest;
import org.kohsuke.stapler.jelly.JellyFacet;
import org.apache.tools.ant.types.FileSet;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.ServletResponse;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Locale;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.security.Security;
/**
* Entry point when Hudson is used as a webapp.
*
* @author Kohsuke Kawaguchi
*/
public final class WebAppMain implements ServletContextListener {
private final RingBufferLogHandler handler = new RingBufferLogHandler();
/**
* Creates the sole instance of {@link Hudson} and register it to the {@link ServletContext}.
*/
public void contextInitialized(ServletContextEvent event) {
try {
final ServletContext context = event.getServletContext();
// Install the current servlet context, unless its already been set
final WebAppController controller = WebAppController.get();
try {
// Attempt to set the context
controller.setContext(context);
}
catch (IllegalStateException e) {
// context already set ignore
}
// Setup the default install strategy if not already configured
try {
controller.setInstallStrategy(new DefaultInstallStrategy());
}
catch (IllegalStateException e) {
// strategy already set ignore
}
// use the current request to determine the language
LocaleProvider.setProvider(new LocaleProvider() {
public Locale get() {
Locale locale=null;
StaplerRequest req = Stapler.getCurrentRequest();
if(req!=null)
locale = req.getLocale();
if(locale==null)
locale = Locale.getDefault();
return locale;
}
});
// quick check to see if we (seem to) have enough permissions to run. (see #719)
JVM jvm;
try {
jvm = new JVM();
new URLClassLoader(new URL[0],getClass().getClassLoader());
} catch(SecurityException e) {
controller.install(new InsufficientPermissionDetected(e));
return;
}
try {// remove Sun PKCS11 provider if present. See http://wiki.hudson-ci.org/display/HUDSON/Solaris+Issue+6276483
Security.removeProvider("SunPKCS11-Solaris");
} catch (SecurityException e) {
// ignore this error.
}
installLogger();
File dir = getHomeDir(event);
try {
dir = dir.getCanonicalFile();
}
catch (IOException e) {
dir = dir.getAbsoluteFile();
}
final File home = dir;
home.mkdirs();
LOGGER.info("Home directory: " + home);
// check that home exists (as mkdirs could have failed silently), otherwise throw a meaningful error
if (! home.exists()) {
controller.install(new NoHomeDir(home));
return;
}
// make sure that we are using XStream in the "enhanced" (JVM-specific) mode
if(jvm.bestReflectionProvider().getClass()==PureJavaReflectionProvider.class) {
// nope
controller.install(new IncompatibleVMDetected());
return;
}
// JNA is no longer a hard requirement. It's just nice to have. See HUDSON-4820 for more context.
// // make sure JNA works. this can fail if
// // - platform is unsupported
// // - JNA is already loaded in another classloader
// // see http://wiki.hudson-ci.org/display/HUDSON/JNA+is+already+loaded
// // TODO: or shall we instead modify Hudson to work gracefully without JNA?
// try {
// /*
// java.lang.UnsatisfiedLinkError: Native Library /builds/apps/glassfish/domains/hudson-domain/generated/jsp/j2ee-modules/hudson-1.309/loader/com/sun/jna/sunos-sparc/libjnidispatch.so already loaded in another classloader
// at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1743)
// at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1674)
// at java.lang.Runtime.load0(Runtime.java:770)
// at java.lang.System.load(System.java:1005)
// at com.sun.jna.Native.loadNativeLibraryFromJar(Native.java:746)
// at com.sun.jna.Native.loadNativeLibrary(Native.java:680)
// at com.sun.jna.Native.<clinit>(Native.java:108)
// at hudson.util.jna.GNUCLibrary.<clinit>(GNUCLibrary.java:86)
// at hudson.Util.createSymlink(Util.java:970)
// at hudson.model.Run.run(Run.java:1174)
// at hudson.matrix.MatrixBuild.run(MatrixBuild.java:149)
// at hudson.model.ResourceController.execute(ResourceController.java:88)
// at hudson.model.Executor.run(Executor.java:123)
// */
// String.valueOf(Native.POINTER_SIZE); // this meaningless operation forces the classloading and initialization
// } catch (LinkageError e) {
// if (e.getMessage().contains("another classloader"))
// controller.install(new JNADoublyLoaded(e));
// else
// controller.install(new HudsonFailedToLoad(e));
// }
// make sure this is servlet 2.4 container or above
try {
ServletResponse.class.getMethod("setCharacterEncoding",String.class);
} catch (NoSuchMethodException e) {
controller.install(new IncompatibleServletVersionDetected(ServletResponse.class));
return;
}
// make sure that we see Ant 1.7
try {
FileSet.class.getMethod("getDirectoryScanner");
} catch (NoSuchMethodException e) {
controller.install(new IncompatibleAntVersionDetected(FileSet.class));
return;
}
// make sure AWT is functioning, or else JFreeChart won't even load.
if(ChartUtil.awtProblemCause!=null) {
controller.install(new AWTProblem(ChartUtil.awtProblemCause));
return;
}
// some containers (in particular Tomcat) doesn't abort a launch
// even if the temp directory doesn't exist.
// check that and report an error
try {
File f = File.createTempFile("test", "test");
f.delete();
} catch (IOException e) {
controller.install(new NoTempDir(e));
return;
}
// Tomcat breaks XSLT with JDK 5.0 and onward. Check if that's the case, and if so,
// try to correct it
try {
TransformerFactory.newInstance();
// if this works we are all happy
} catch (TransformerFactoryConfigurationError x) {
// no it didn't.
LOGGER.log(Level.WARNING, "XSLT not configured correctly. Hudson will try to fix this. See http://issues.apache.org/bugzilla/show_bug.cgi?id=40895 for more details",x);
System.setProperty(TransformerFactory.class.getName(),"com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl");
try {
TransformerFactory.newInstance();
LOGGER.info("XSLT is set to the JAXP RI in JRE");
} catch(TransformerFactoryConfigurationError y) {
LOGGER.log(Level.SEVERE, "Failed to correct the problem.");
}
}
installExpressionFactory(event);
controller.install(new HudsonIsLoading());
new Thread("hudson initialization thread") {
@Override
public void run() {
try {
// Creating of the god object performs most of the booting muck
Hudson hudson = new Hudson(home,context);
// once its done, hook up to stapler and things should be ready to go
controller.install(hudson);
// trigger the loading of changelogs in the background,
// but give the system 10 seconds so that the first page
// can be served quickly
Trigger.timer.schedule(new SafeTimerTask() {
public void doRun() {
User.getUnknown().getBuilds();
}
}, 1000*10);
} catch (Error e) {
LOGGER.log(Level.SEVERE, "Failed to initialize Hudson",e);
controller.install(new HudsonFailedToLoad(e));
throw e;
} catch (Exception e) {
LOGGER.log(Level.SEVERE, "Failed to initialize Hudson",e);
controller.install(new HudsonFailedToLoad(e));
}
}
}.start();
} catch (Error e) {
LOGGER.log(Level.SEVERE, "Failed to initialize Hudson",e);
throw e;
} catch (RuntimeException e) {
LOGGER.log(Level.SEVERE, "Failed to initialize Hudson",e);
throw e;
}
}
public static void installExpressionFactory(ServletContextEvent event) {
JellyFacet.setExpressionFactory(event, new ExpressionFactory2());
}
/**
* Installs log handler to monitor all Hudson logs.
*/
private void installLogger() {
Hudson.logRecords = handler.getView();
Logger.getLogger("hudson").addHandler(handler);
}
/**
* Determines the home directory for Hudson.
*
* People makes configuration mistakes, so we are trying to be nice
* with those by doing {@link String#trim()}.
*/
private File getHomeDir(ServletContextEvent event) {
// check JNDI for the home directory first
try {
InitialContext iniCtxt = new InitialContext();
Context env = (Context) iniCtxt.lookup("java:comp/env");
String value = (String) env.lookup("HUDSON_HOME");
if(value!=null && value.trim().length()>0)
return new File(value.trim());
// look at one more place. See issue #1314
value = (String) iniCtxt.lookup("HUDSON_HOME");
if(value!=null && value.trim().length()>0)
return new File(value.trim());
} catch (NamingException e) {
// ignore
}
// finally check the system property
String sysProp = System.getProperty("HUDSON_HOME");
if(sysProp!=null)
return new File(sysProp.trim());
// look at the env var next
String env = EnvVars.masterEnvVars.get("HUDSON_HOME");
if(env!=null)
return new File(env.trim()).getAbsoluteFile();
// otherwise pick a place by ourselves
String root = event.getServletContext().getRealPath("/WEB-INF/workspace");
if(root!=null) {
File ws = new File(root.trim());
if(ws.exists())
// Hudson <1.42 used to prefer this before ~/.hudson, so
// check the existence and if it's there, use it.
// otherwise if this is a new installation, prefer ~/.hudson
return ws;
}
// if for some reason we can't put it within the webapp, use home directory.
return new File(new File(System.getProperty("user.home")),".hudson");
}
public void contextDestroyed(ServletContextEvent event) {
Hudson instance = Hudson.getInstance();
if(instance!=null)
instance.cleanUp();
// Logger is in the system classloader, so if we don't do this
// the whole web app will never be undepoyed.
Logger.getLogger("hudson").removeHandler(handler);
}
private static final Logger LOGGER = Logger.getLogger(WebAppMain.class.getName());
}