| SubDeployerSupport.java |
/***************************************
* *
* JBoss: The OpenSource J2EE WebOS *
* *
* Distributable under LGPL license. *
* See terms of license at gnu.org. *
* *
***************************************/
package org.jboss.deployment;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import javax.management.Notification;
import org.jboss.mx.util.MBeanProxyExt;
import org.jboss.system.ServiceMBeanSupport;
import org.jboss.system.server.ServerConfig;
import org.jboss.system.server.ServerConfigLocator;
import org.jboss.system.server.ServerConfigUtil;
import org.jboss.system.server.ServerConfigImpl;
import org.jboss.util.file.JarUtils;
import org.jboss.util.stream.Streams;
/**
* An abstract {@link SubDeployer}.
*
* Provides registration with {@link MainDeployer} as well as
* implementations of init, create, start, stop and destroy that
* generate JMX notifications on completion of the method.
*
* @version <tt>$Revision: 1.25.2.4 $</tt>
* @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
* @author Scott.Stark@jboss.org
* @author <a href="mailto:dimitris@jboss.org">Dimitris Andreadis</a>
*/
public abstract class SubDeployerSupport
extends ServiceMBeanSupport
implements SubDeployer, SubDeployerMBean
{
/**
* Holds the native library <em>suffix</em> for this system.
*
* <p>
* Determined by examining the result of System.mapLibraryName(specialToken).
* The special token defaults to "XxX", but can be changed by setting the
* system property: <tt>org.jboss.deployment.SubDeployerSupport.nativeLibToken</tt>.
*/
protected static final String nativeSuffix;
/**
* Holds the native library <em>prefix</em> for this system.
*
* @see #nativeSuffix
*/
protected static final String nativePrefix;
/** A proxy to the MainDeployer. */
protected MainDeployerMBean mainDeployer;
/** The temporary directory into which deployments are unpacked */
protected File tempDeployDir;
/** The suffixes of interest to this subdeployer */
protected String[] suffixes;
/** The relative order of the suffixes */
protected int relativeOrder = RELATIVE_ORDER_500;
/** The temporary directory where native libs are unpacked. */
private File tempNativeDir;
/** Whether to load native libraries */
private boolean loadNative = false;
/**
* The <code>createService</code> method is one of the ServiceMBean lifecyle operations.
* (no jmx tag needed from superinterface)
* @exception Exception if an error occurs
*/
protected void createService() throws Exception
{
// get the temporary directorys to use
ServerConfig config = ServerConfigLocator.locate();
tempNativeDir = config.getServerNativeDir();
tempDeployDir = config.getServerTempDeployDir();
loadNative = ServerConfigUtil.isLoadNative();
// Setup the proxy to mainDeployer
mainDeployer = (MainDeployerMBean)
MBeanProxyExt.create(MainDeployerMBean.class,
MainDeployerMBean.OBJECT_NAME,
server);
}
/**
* Performs SubDeployer registration.
*/
protected void startService() throws Exception
{
// Register with the main deployer
mainDeployer.addDeployer(this);
}
/**
* Performs SubDeployer deregistration.
*/
protected void stopService() throws Exception
{
// Unregister with the main deployer
mainDeployer.removeDeployer(this);
}
/**
* Clean up.
*/
protected void destroyService() throws Exception
{
// Help the GC
mainDeployer = null;
tempNativeDir = null;
}
/**
* Get an array of suffixes of interest to this subdeployer
* @return array of suffix strings
*/
public String[] getSuffixes()
{
return this.suffixes;
}
/**
* Set an array of suffixes of interest to this subdeployer
* @param suffixes array of suffix strings
*/
public void setSuffixes(String[] suffixes)
{
this.suffixes = suffixes;
}
/**
* Get the relative order of the specified suffixes
* @return the relative order of the specified suffixes
*/
public int getRelativeOrder()
{
return this.relativeOrder;
}
/**
* Set the relative order of the specified suffixes
* @param relativeOrder the relative order of the specified suffixes
*/
public void setRelativeOrder(int relativeOrder)
{
this.relativeOrder = relativeOrder;
}
/**
* Sub-classes should override this method to provide
* custom 'init' logic.
*
* <p>This method calls the processNestedDeployments(di) method and then
* issues a JMX notification of type SubDeployer.INIT_NOTIFICATION.
* This behaviour can overridden by concrete sub-classes. If further
* initialization needs to be done, and you wish to preserve the
* functionality, be sure to call super.init(di) at the end of your
* implementation.
*/
public void init(DeploymentInfo di) throws DeploymentException
{
processNestedDeployments(di);
emitNotification(SubDeployer.INIT_NOTIFICATION, di);
}
/**
* Sub-classes should override this method to provide
* custom 'create' logic.
*
* This method issues a JMX notification of type SubDeployer.CREATE_NOTIFICATION.
*/
public void create(DeploymentInfo di) throws DeploymentException
{
emitNotification(SubDeployer.CREATE_NOTIFICATION, di);
}
/**
* Sub-classes should override this method to provide
* custom 'start' logic.
*
* This method issues a JMX notification of type SubDeployer.START_NOTIFICATION.
*/
public void start(DeploymentInfo di) throws DeploymentException
{
emitNotification(SubDeployer.START_NOTIFICATION, di);
}
/**
* Sub-classes should override this method to provide
* custom 'stop' logic.
*
* This method issues a JMX notification of type SubDeployer.START_NOTIFICATION.
*/
public void stop(DeploymentInfo di) throws DeploymentException
{
emitNotification(SubDeployer.STOP_NOTIFICATION, di);
}
/**
* Sub-classes should override this method to provide
* custom 'destroy' logic.
*
* This method issues a JMX notification of type SubDeployer.DESTROY_NOTIFICATION.
*/
public void destroy(DeploymentInfo di) throws DeploymentException
{
emitNotification(SubDeployer.DESTROY_NOTIFICATION, di);
}
/**
* Simple helper to emit a subdeployer notification containing DeploymentInfo
*/
protected void emitNotification(String type, DeploymentInfo di)
{
Notification notification = new Notification(type, this, getNextNotificationSequenceNumber());
notification.setUserData(di);
sendNotification(notification);
}
/**
* The <code>processNestedDeployments</code> method searches for any nested and
* deployable elements. Only Directories and Zipped archives are processed,
* and those are delegated to the addDeployableFiles and addDeployableJar
* methods respectively. This method can be overridden for alternate
* behaviour.
*/
protected void processNestedDeployments(DeploymentInfo di) throws DeploymentException
{
log.debug("looking for nested deployments in : " + di.url);
if (di.isXML)
{
// no nested archives in an xml file
return;
}
if (di.isDirectory)
{
File f = new File(di.url.getFile());
if (!f.isDirectory())
{
// something is screwy
throw new DeploymentException
("Deploy file incorrectly reported as a directory: " + di.url);
}
addDeployableFiles(di, f);
}
else
{
try
{
// Obtain a jar url for the nested jar
URL nestedURL = JarUtils.extractNestedJar(di.localUrl, this.tempDeployDir);
JarFile jarFile = new JarFile(nestedURL.getFile());
addDeployableJar(di, jarFile);
}
catch (Exception e)
{
log.warn("Failed to add deployable jar: " + di.localUrl, e);
//
// jason: should probably throw new DeploymentException
// ("Failed to add deployable jar: " + jarURLString, e);
// rather than make assumptions to what type of deployable
// file this was that failed...
//
return;
}
}
}
/**
* This method returns true if the name is a recognized archive file.
*
* It will query the MainDeployer that keeps a dynamically updated
* list of known archive extensions.
*
* @param name The "short-name" of the URL. It will have any trailing '/'
* characters removed, and any directory structure has been removed.
* @param url The full url.
*
* @return true iff the name ends in a known archive extension: .jar, .sar,
* .ear, .rar, .zip, .wsr, .war, or if the name matches the native
* library conventions.
*/
protected boolean isDeployable(String name, URL url)
{
// any file under META-INF is not deployable; this method is called
// also for zipped content, e.g. dir1/dir2.sar/META-INF/bla.xml
if (url.getPath().indexOf("META-INF") != -1)
{
return false;
}
String[] suffixes = mainDeployer.getSuffixOrder();
for (int i = 0; i < suffixes.length; i++)
{
if (name.endsWith(suffixes[i]))
{
return true;
}
}
// this is probably obsolete
return (name.endsWith(nativeSuffix) && name.startsWith(nativePrefix));
}
/**
* This method recursively searches the directory structure for any files
* that are deployable (@see isDeployable). If a directory is found to
* be deployable, then its subfiles and subdirectories are not searched.
*
* @param di the DeploymentInfo
* @param dir The root directory to start searching.
*/
protected void addDeployableFiles(DeploymentInfo di, File dir)
throws DeploymentException
{
File[] files = dir.listFiles();
for (int i = 0; i < files.length; i++)
{
File file = files[i];
String name = file.getName();
try
{
URL url = file.toURL();
if (isDeployable(name, url))
{
deployUrl(di, url, name);
// we don't want deployable units processed any further
continue;
}
}
catch (MalformedURLException e)
{
log.warn("File name invalid; ignoring: " + file, e);
}
if (file.isDirectory())
{
addDeployableFiles(di, file);
}
}
}
/**
* This method searches the entire jar file for any deployable files
* (@see isDeployable).
*
* @param di the DeploymentInfo
* @param jarFile the jar file to process.
*/
protected void addDeployableJar(DeploymentInfo di, JarFile jarFile)
throws DeploymentException
{
String urlPrefix = "jar:"+di.localUrl.toString()+"!/";
for (Enumeration e = jarFile.entries(); e.hasMoreElements();)
{
JarEntry entry = (JarEntry)e.nextElement();
String name = entry.getName();
try
{
URL url = new URL(urlPrefix+name);
if (isDeployable(name, url))
{
// Obtain a jar url for the nested jar
URL nestedURL = JarUtils.extractNestedJar(url, this.tempDeployDir);
deployUrl(di, nestedURL, name);
}
}
catch (MalformedURLException mue)
{
//
// jason: why are we eating this exception?
//
log.warn("Jar entry invalid; ignoring: " + name, mue);
}
catch (IOException ex)
{
log.warn("Failed to extract nested jar; ignoring: " + name, ex);
}
}
}
protected void deployUrl(DeploymentInfo di, URL url, String name)
throws DeploymentException
{
log.debug("nested deployment: " + url);
try
{
//
// jason: need better handling for os/arch specific libraries
// should be able to have multipule native libs in an archive
// one for each supported platform (os/arch), we only want to
// load the one for the current platform.
//
// This probably means explitly listing the libraries in a
// deployment descriptor, which could probably also be used
// to explicitly map the files, as it might be possible to
// share a native lib between more than one version, no need
// to duplicate the file, metadata can be used to tell us
// what needs to be done.
//
// Also need this mapping to get around the different values
// which are used by vm vendors for os.arch and such...
//
if (name.endsWith(nativeSuffix) && name.startsWith(nativePrefix))
{
File destFile = new File(tempNativeDir, name);
log.info("Loading native library: " + destFile.toString());
File parent = destFile.getParentFile();
if (!parent.exists()) {
parent.mkdirs();
}
InputStream in = url.openStream();
OutputStream out = new FileOutputStream(destFile);
Streams.copyb(in, out);
out.flush();
out.close();
in.close();
if (loadNative)
System.load(destFile.toString());
}
else
{
new DeploymentInfo(url, di, getServer());
}
}
catch (Exception ex)
{
throw new DeploymentException
("Could not deploy sub deployment "+name+" of deployment "+di.url, ex);
}
}
/////////////////////////////////////////////////////////////////////////
// Class Property Configuration //
/////////////////////////////////////////////////////////////////////////
/**
* Static configuration properties for this class. Allows easy access
* to change defaults with system properties.
*/
protected static class ClassConfiguration
extends org.jboss.util.property.PropertyContainer
{
private String nativeLibToken = "XxX";
public ClassConfiguration()
{
// properties will be settable under our enclosing classes group
super(SubDeployerSupport.class);
// bind the properties & the access methods
bindMethod("nativeLibToken");
}
public void setNativeLibToken(final String token)
{
this.nativeLibToken = token;
}
public String getNativeLibToken()
{
return nativeLibToken;
}
}
/** The singleton class configuration object for this class. */
protected static final ClassConfiguration CONFIGURATION = new ClassConfiguration();
//
// jason: the following needs to be done after setting up the
// class config reference, so it is moved it down here.
//
/**
* Determine the native library suffix and prefix.
*/
static
{
// get the token to use from config, incase the default needs
// to be changed to resolve problem with a specific platform
String token = CONFIGURATION.getNativeLibToken();
// then determine what the prefix and suffixes are for this platform
String nativex = System.mapLibraryName(token);
int xPos = nativex.indexOf(token);
nativePrefix = nativex.substring(0, xPos);
nativeSuffix = nativex.substring(xPos + 3);
}
}
| SubDeployerSupport.java |