The article is a good reading for the GlassFish & JBI users. The new features of the Sun Java EE Engine, available as part of GlassFish V2, have been explained in detail in the article.
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Recently,
the component name of the Java EE service engine is changed from
"JavaEEServiceEngine" to "sun-javaee-engine". It
is very easy for the end users to migrate their applications to the
new name. All that is required is to open your existing JBI project
in NetBeans, build and deploy.
These are the detailed
steps:
1. Go to
http://www.netbeans.org/community/releases/60/index.html
2.
Click "Download Preview"
3. Select your platform and
download "Full" version.
4. Open your JBI project with
this new NetBeans, do a "Clean and Build Project" and
"Deploy Project".
If you have Non-NetBeans projects,
then the following program can be used to migrate your projects to
the new name. You just need to compile it and run it. You can also
modify this utility to server your
purpose.
JBICompNameChangeUtil.java
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileFilter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class JBICompNameChangeUtil {
private void printUsage() {
System.err.println("Usage: java JBICompNameChangeUtil " +
"<root-directory-for-all-projects>");
System.err.println("For example: java JBICompNameChangeUtil" +
" /space/projects/jbi");
}
private void changeName(String... args) {
if(args.length != 1) {
printUsage();
System.exit(1);
}
File root = new File(args[0]);
if(!root.exists() || !root.isDirectory()) {
printUsage();
System.exit(1);
}
List fileList = new ArrayList();
getAllImpactedFiles(root, fileList);
for(Iterator i = fileList.iterator(); i.hasNext();) {
File file = (File)i.next();
try {
updateFile(file);
} catch(FileNotFoundException ex) {
ex.printStackTrace();
} catch(IOException ex) {
ex.printStackTrace();
}
}
}
private void getAllImpactedFiles(File root, List fileList) {
FileFilter myFileFilter = new FileFilter() {
public boolean accept(File file) {
if(file.isDirectory()) {
return true;
} else {
String fileName = file.getName();
return fileName.equals("jbi.xml");
}
}
};
File files[] = root.listFiles(myFileFilter);
File arr[] = files;
int len = arr.length;
for(int i = 0; i < len; i++) {
File file = arr[i];
if(file.isDirectory())
getAllImpactedFiles(file, fileList);
else
fileList.add(file);
}
}
private void updateFile(File file)
throws FileNotFoundException, IOException {
System.out.println((new StringBuilder()).append("Updating ").
append(file.getPath()).append("...").toString());
String fileName = file.getName();
BufferedReader reader = new BufferedReader(new FileReader(file));
File tempFile = File.createTempFile(fileName, "tmp");
BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));
String line;
if(fileName.equals("jbi.xml")) {
while((line = reader.readLine()) != null) {
line = updateSEName(line);
writer.write((new StringBuilder()).append(line).
append(LINE_SEPARATOR).toString());
}
}
writer.close();
reader = new BufferedReader(new FileReader(tempFile));
writer = new BufferedWriter(new FileWriter(file));
while((line = reader.readLine()) != null)
writer.write((new StringBuilder()).append(line).
append(LINE_SEPARATOR).toString());
reader.close();
writer.close();
tempFile.delete();
}
private String updateSEName(String line) {
if(line.indexOf("JavaEEServiceEngine") != -1)
line = line.replace("JavaEEServiceEngine", "sun-javaee-engine");
return line;
}
private static final String LINE_SEPARATOR =
System.getProperty("line.separator");
public static void main(String args[]) {
JBICompNameChangeUtil instance =
new JBICompNameChangeUtil();
instance.changeName(args);
}
}
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package com.sun.samples.appserver;
import java.util.ArrayList;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import javax.management.Notification;
import javax.management.ObjectName;
/**
*
* @author Bhavanishankar <bshankar@sun.com>
*
*/
public class SelfManageJBIComps
implements SelfManageJBICompsMBean, SelfManageJBICompsConstants {
public synchronized void handleNotification(
Notification notification,
Object obj) {
StringBuffer debugMessage = new StringBuffer
("\n\nSelfManageJBIComps :: \n");
System.out.println("SelfManageJBIComps.handleNotification : " +
notification.getClass().getName());
/**
* Allow the JBI framework to initialize itself properly.
*/
if(firstInvocation) {
firstInvocation = false;
return;
}
/**
* Step 1. Get the connection to the MBean server.
*/
initMBeanConnection();
/**
* Step 2. Get the list of deployed service assemblies.
*/
Object ret = invokeMBean(
getDeploymentServiceMBeanName(),
"getDeployedServiceAssemblies",
new Object[]{},
new String[]{});
if(ret == null) {
return;
}
String[] serviceAssemblies = (String[]) ret;
/**
* Step 3. For each service assembly which is in "Started"
* state, if the required component's state is not started
* then start the component.
*/
for(String sa : serviceAssemblies) {
debugMessage.append("\n\tProcessing ServiceAssembly " +
sa + "...");
/**
* Step 3.1. Get the state of the service assembly.
*/
ret = invokeMBean(
getDeploymentServiceMBeanName(),
"getState",
new Object[] {sa},
new String[] {"java.lang.String"});
if(ret == null) {
continue;
}
String saState = (String)ret;
debugMessage.append("\n\tState of the ServiceAssembly is " +
saState);
/**
* Step 3.2 If the state is "Started" then
* get the list of Components for this service assembly.
*/
if(!"Started".equalsIgnoreCase(saState)) {
continue;
}
ret = invokeMBean(
getDeploymentServiceMBeanName(),
"getComponentsForDeployedServiceAssembly",
new Object[] {sa},
new String[] {"java.lang.String"});
if(ret == null) {
continue;
}
String[] jbiComps = (String[])ret;
for(String jbiComp : jbiComps) {
debugMessage.append("\n\n\t JBIComponent used " +
"by " + sa + " is " + jbiComp);
ret = invokeMBean(
getAdminServiceMBeanName(),
"getComponentByName",
new Object[]{jbiComp},
new String[]{"java.lang.String"});
if(ret == null) {
continue;
}
ObjectName compName = (ObjectName)ret;
ret = invokeMBean(
compName,
"getCurrentState",
new Object[]{},
new String[]{});
if(ret == null) {
continue;
}
String componentState = (String) ret;
debugMessage.append("\n\t State of the " + jbiComp +
" is " + componentState);
if(!"started".equalsIgnoreCase(componentState)) {
debugMessage.append("\n\t Starting " +
jbiComp + "...");
ret = invokeMBean(
compName,
"start",
new Object[] {},
new String[] {});
debugMessage.append("\n\t Successfully started " +
jbiComp);
}
}
}
System.out.println(debugMessage.toString());
}
private static MBeanServer mBeanServer;
private static boolean firstInvocation = true;
/**
* Get the connection to the MBean server.
*/
private synchronized void initMBeanConnection() {
if(mBeanServer == null) {
ArrayList<MBeanServer> mBeanServers =
MBeanServerFactory.findMBeanServer(null);
if(!mBeanServers.isEmpty()) {
mBeanServer = mBeanServers.get(0);
}
if(mBeanServer == null) {
System.err.println("Unable " +
"to obtain connection to MBean server");
}
}
}
private Object invokeMBean(
ObjectName mBeanName,
String methodName,
Object[] params,
String[] signatures) {
Object output = null;
try {
output = mBeanServer.invoke(mBeanName,
methodName, params, signatures);
} catch(Exception ex) {
ex.printStackTrace();
}
return output;
}
private ObjectName getDeploymentServiceMBeanName() {
ObjectName objName = null;
try {
objName = new ObjectName(DEPLOYMENT_SERVICE_MBEAN);
} catch(Exception ex) {
ex.printStackTrace();
}
return objName;
}
private ObjectName getAdminServiceMBeanName() {
ObjectName objName = null;
try {
objName = new ObjectName(ADMIN_SERVICE_MBEAN);
} catch(Exception ex) {
ex.printStackTrace();
}
return objName;
}
}
package com.sun.samples.appserver;
import javax.management.NotificationListener;
/**
*
* @author Bhavanishankar <bshankar@sun.com>
*
*/
public interface SelfManageJBICompsMBean
extends NotificationListener {
}