Guyub – Konsultan F/OSS

If you’ll be in the San Francisco area during JavaOne week, and you’re interesting in attending some of JavaOne, but don’t want to pay for the entire conference, consider purchasing a JavaOne / Oracle Develop Discover pass. The base Discover pass costs just $75 and provides you with entry into the keynote addresses, the exhibition halls, the Mason Street Tent (where I’ll be spending quite a lot of time), Oracle Mix, and more. If you’d like to attend a few sessions, consider the Discover Plus pass, which provides your choice of three OpenWorld or JavaOne / Oracle Develop sessions and some other extras, for $695.

Note that these prices are the pre-conference prices — you need to purchase your Discover pass by September 18 to get these rates. If you purchase your pass at the conference, the cost will be $125 for the Discover pass, and $795 for the Discover Plus pass.

The Mason Street Tent will be in part a gathering center for the Java community. As java.net Community Manager Sonya Barry recently reported, the tent will be the center of java.net activity at JavaOne. Though I’ll be attending quite a lot of sessions, when I’m not attending a session, you’ll usually find me in the tent (probably writing a blog about the last session I attended, or chatting with the community, or writing a blog about one of those chats). Java User Group leaders are expected to be setting up shop near the java.net area, and the Oracle Technology Network will also be in the area. The OTN will be featuring a full schedule of interviews and talks with key members of the Java and broader open source communities as part of its Oracle Technology Network Live program.

You can get a sneak preview of JavaOne, including what’s going to be in the tent, this coming Tuesday, September 7, at 10 AM, Pacific Time, in a special edition of Justin Kestelyn’s TechCast Live. See the details in the JavaOne Conference Blog’s post JavaOne Preview on TechCast Live! (Tues., Sept. 7, 10am PT).

Still having doubts? Well, as Sonya notes, java.net will be located right next to the coffee and beer — so that should guarantee we’ll see you, right?

But, seriously, if you’d like to attend just some of JavaOne, do consider purchasing a JavaOne / Oracle Develop Discover pass. With everything that’s going to be going on in the tent, in the exhibition halls, and at the keynotes, how can you go wrong for just $75 (or $695 to be able to attend 3 sessions)?

Java Today

In the Aquarium, Alexis Moussine-Pouchkine announces a New GlassFish 3.1 Screencast: Application-scoped resources:

This short screencast demonstrates the new application-scoped resources feature available starting with Milestone 4 of GlassFish 3.1 (the demo used promoted build #17). Such resources are bound to a module (war, ear, ejb) and as such they are created on deploy and destroyed when the module is undeployed. They are defined in a file called glassfish-resources.xml (schema-constrained) and shipped with the archive…

At Hudson Labs, Kohsuke Kawaguchi talks about Recent label and matrix project improvement:

Today, I?d highlight two recent improvements to the label and matrix projects. When you have multiple slaves in your Hudson build farm, you can use labels to classify slaves by their capability/environment/architecture/etc. For example, your one slave might have ?32bit? and ?windows? label, while another one might have ?linux?, ?ubuntu?, and ?64bit.? (with plugins like platform-labeler plugin, you can attach labels automatically, too.) Or if you do Selenium testing, you might add browser names as labels to indicate which slave has which browser available…

Robilad announces the availability of JVM Language Summit 2010 Recordings On Oracle Media Network:

The recordings of the majority of the sessions from the JVM Language Summit 2010 have been uploaded to the Oracle Media Network. Paul Leahy has compiled a list of session recordings and their corresponding abstracts. Slide decks for most of the sessions are available on the JVM Language Summit wiki…

James Sugrue reports on Eclipse innovations in IDE 2.0: The Age of Intelligent IDEs -

The latest innovation in the Eclipse space that I’d like to share with you is Code Recommenders. Already available as a plugin for Eclipse, Code Recommenders provides intelligent code completion. Rather than giving you all possible methods for code completion, this plugin proposes the methods that you probably need at the top of the list, with a rating of how applicable each method is. To see Code Recommenders in action, see the following screencast…

Poll

Our current java.net poll asks What threat does further fragmentation of the Java language pose? Voting will be open until Monday.

Spotlights

Our new java.net Spotlight is from the JavaOne Conference Blog, JavaOne Preview on TechCast Live! (Tues., Sept. 7, 10am PT):

You’ve read the blogs, you’ve consumed the tweets and Facebook updates. Now how about hearing from some live humans? Next Tuesday morning (Sept. 7, 10am PT), Oracle Technology Network offers you a JavaOne preview via a live video chat with Sharat Chandar and Tori Wieldt, two people intimately familiar with the content and community aspects of the conference. You’ll get insights into the content contribution process, hear about particularly interesting technical sessions and BOFs, and get a sneak peek of the contents of the Mason St. tent, where Oracle Technology Network will host the community in all its glory…

We’re also still highlighting java.net Community Manager Sonya Barry’s JavaOne Conference Blog post Java.net Activities at JavaOne:

I’m excited about JavaOne this year.  It’s going to be different in a lot of ways, but we are doing our best to ensure that the Java.net presence for the community is just as good if not better then previous years.  In years past Java.net has had a “community corner” booth in the JavaOne pavilion at Moscone… This time we’ll be housed in the Mason Street tent, which will be a large comfortable space for people from all of the technology communities to hang out, pick up swag, watch the videocasts, and see some live events too..,

Subscriptions and Archives: You can subscribe to this blog using the java.net Editor’s Blog Feed. You can also subscribe to the Java Today RSS feed and the java.net blogs feed. You can find historical archives of what has appeared the front page of java.net in the java.net home page archive.

– Kevin Farnham

Twitter: @kevin_farnham

It has been a while since a blog about Grizzly, I was too busy adding new features. The Grizzly Deployer’s community grows and requested theses new features.

Grizzly Deployer is a bundle of Grizzly project that act as a web container. It will allow you to deploy applications (war, servlet).
Works fine for Comet, Atmosphere, JSP applications … For more details, I suggest this link Introduction to the first release of Grizzly Deployer

First, lets take a look at the command line parameters.

Usage: com.sun.grizzly.http.servlet.deployer.GrizzlyWebServerDeployer

  -a, --application=[path]    Application(s) path(s).

                              Application(s) deployed can be :
                              Servlet(s), war(s) and expanded war folder(s).
                              To deploy multiple applications
                              use File.pathSeparator

                              Example : -a /app.war:/servlet/web.xml:/warfolder/

  -p, --port=[port]           Runs Servlet on the specified port.
                              Default: 8080

  -c, --context=[context]     Force the context for a servlet.
                              Only valid for servlet deployed using
                              -a [path]/[filename].xml

  --dontstart=[true/false]    Won't start the server.
                              You will need to call the start method.
                              Useful for Unit testing.
                              Default : false

  --libraryPath=[path]        Add a libraries folder to the classpath.
                              You can append multiple folders using
                              File.pathSeparator

                              Example : --libraryPath=/libs:/common_libs

  --autodeploy=[path]         AutoDeploy to each applications.
                              You could add JSP support.
                              Just add a web.xml that contains Jasper

                              Example : --autodeploy=/autodeploy

  --webdefault=[path]         webdefault to be used by all applications, can be file or dir with multipe web.xmls.
                              If you want to add only one webdefault point it to web.xml file,
                              If you want multiple files to be included put them in one dir and provide this location here.

                              Example : --webdefault=webdefault.xml

  --cometEnabled=[true/false] Starts the AsyncFilter for Comet.
                              You need to active this for comet applications.
                              Default : false

  --websocketsEnabled=[true/false] Starts the AsyncFilter for Websockets.
                              You need to active this for websockets applications.
                              Default : false

  --forceWar=[true/false]     Force war's deployment over a expanded folder.
                              Will deploy the war instead of the folder.
                              Default : false

  --ajpEnabled=[true/false]   Enable mod_jk.
                              Default : false

  --watchInterval=[seconds]   Watch interval to scan for new applications to deploy in work folder.
                              Default : -1 ; disabled

  --watchFolder=[path]        Folder to scan for new applications to deploy in work folder
                              Default : none

Websocket support

The first feature added was Websockets support. It can be enabled at command line by using the parameter –websocketEnabled=true . That will allow you to deploy Websocket applications.

Watch folder

This feature is interesting, because most of the web container have it. Grizzly Deployer will watch a specific folder to applications to deploy. When this feature was added, I remove the need to specify a application to deploy by command line.
To enable this feature you need to use the command line parameter –watchFolder=[path]. It can be used with this other parameter : –watchInterval=[seconds].

The parameter –watchInterval is used to create a watchdog that will monitor the watch folder. If the parameter –watchInterval is not present, when Grizzly Deployer starts, it will check
all applications that are in the watch folder at launch time and will deploy them, but it won’t monitor the folder after that.

When both of theses parameters are used, it will create a watchdog that will deploy and undeploy application put in the watch folder, and remove from that folder. If you deploy an application at command line and put another application with the
same context name in the watch folder, the application in the watch folder won’t be deploy twice.

Embedded Grizzly Deployer

Grizzly Deployer could already be embedded trough his API, but we got few feedback about to make it simplier. The problem wasn’t the API, it just that most people will only use the main part of Grizzly Deployer : deploy a war.

So to make it easier and faster to implement, I did a little refactoring. We now have 2 main config classes we could use to launch an Embedded Grizzly Deployer : DeployerServerConfiguration and DeployableConfiguration.

DeployerServerConfiguration

That file is used to launch Grizzly Deployer. It contains the same command line parameters. In fact, at runtime, the command line parser use that classe.

    GrizzlyWebServerDeployer deployer = new GrizzlyWebServerDeployer();

    DeployerServerConfiguration conf = new DeployerServerConfiguration();
    conf.cometEnabled = true;
    conf.watchFolder="C:/temp/webapps/";
    conf.watchInterval=15;
    deployer.launch(conf);

Once grizzly Deployer is launched in your application, you can deploy a war later. For that, you use this class : DeployableConfiguration.

    DeployableConfiguration warConfig = new DeployableConfiguration();
    warConfig.location = "C:/temp/webapps/grizzly-jmaki.war";

    deployer.deployApplication(warConfig);

You can follow me on Twitter.

CONTEXT

...

symbol.setBid(update.getBid());
symbol.setAsk(update.getAsk());

...

for(Client client : clientList){
    client.sendUpdate(symbol);
}

....

package ca.sebastiendionne.demo.model;

import java.io.Serializable;

public class SymbolSerializable implements Serializable {

    private static final long serialVersionUID = 7853892880704628717L;

    Double bid = null;
    Double ask = null;

    public SymbolSerializable(){
    }

    public Double getBid() {
        return bid;
    }
    public void setBid(Double bid) {
        this.bid = bid;
    }
    public Double getAsk() {
        return ask;
    }
    public void setAsk(Double ask) {
        this.ask = ask;
    }

    @Override
    public String toString() {
        return "bid = " + bid + "  ask=" + ask;
    }

}

package ca.sebastiendionne.demo.model;

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;

public class SymbolExternalizable implements Externalizable {
    private static final long serialVersionUID = 1853892880704628717L;

    Double bid = null;
    Double ask = null;

    public SymbolExternalizable(){

    }

    public Double getBid() {
        return bid;
    }
    public void setBid(Double bid) {
        this.bid = bid;
    }
    public Double getAsk() {
        return ask;
    }
    public void setAsk(Double ask) {
        this.ask = ask;
    }

    @Override
    public String toString() {
        return "bid = " + bid + "  ask=" + ask;
    }

    @Override
    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
        bid = (Double)in.readObject();
        ask = (Double)in.readObject();
    }

    @Override
    public void writeExternal(ObjectOutput out) throws IOException {
        out.writeObject(bid);
        out.writeObject(ask);
    }

}

package ca.sebastiendionne.demo;

import java.io.EOFException;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import ca.sebastiendionne.demo.model.SymbolSerializable;

public class SerializationFailed {

    /**
     * @param args
     */
    public static void main(String[] args) throws Exception {

        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(new File("test.ser"))); 

        SymbolSerializable symbol = new SymbolSerializable();

        // dummy values
        symbol.setAsk(new Double(-1));
        symbol.setBid(new Double(-1));

        for(int i=0;i<10;i++){
            // update values
            symbol.setAsk(new Double(i));
            symbol.setBid(new Double(i));

            oos.writeObject(symbol);
            oos.flush();
        }

        oos.flush();
        oos.close();

        // read

        ObjectInputStream ois = new ObjectInputStream(new FileInputStream(new File("test.ser")));

        try {
            Object obj = null;
            while((obj = ois.readObject())!=null){
                System.out.println((SymbolSerializable)obj);
            }
        } catch (EOFException e) {
            System.out.println("All items read");
        } catch(Exception e){
            e.printStackTrace();
        } finally {
            ois.close();
        }

    }

}

package ca.sebastiendionne.demo;

import java.io.EOFException;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import ca.sebastiendionne.demo.model.SymbolExternalizable;

public class SerializationFailed2 {

    /**
     * @param args
     */
    public static void main(String[] args) throws Exception {

        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(new File("test.ser"))); 

        SymbolExternalizable symbol = new SymbolExternalizable();

        // dummy values
        symbol.setAsk(new Double(-1));
        symbol.setBid(new Double(-1));

        for(int i=0;i<10;i++){
            // update values
            symbol.setAsk(new Double(i));
            symbol.setBid(new Double(i));

            oos.writeObject(symbol);
            oos.flush();
        }

        oos.flush();
        oos.close();

        // read

        ObjectInputStream ois = new ObjectInputStream(new FileInputStream(new File("test.ser")));

        try {
            Object obj = null;
            while((obj = ois.readObject())!=null){
                System.out.println((SymbolExternalizable)obj);
            }
        } catch (EOFException e) {
            System.out.println("All items read");
        } catch(Exception e){
            e.printStackTrace();
        } finally {
            ois.close();
        }

    }

}

package ca.sebastiendionne.demo;

import java.io.EOFException;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import ca.sebastiendionne.demo.model.SymbolSerializable;

public class SerializationWithNew {

    /**
     * @param args
     */
    public static void main(String[] args) throws Exception {

        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(new File("test.ser"))); 

        SymbolSerializable symbol = new SymbolSerializable();

        // dummy values
        symbol.setAsk(new Double(-1));
        symbol.setBid(new Double(-1));

        for(int i=0;i<10;i++){
            // update values
            symbol.setAsk(new Double(i));
            symbol.setBid(new Double(i));

            SymbolSerializable symbol2 = new SymbolSerializable();
            symbol2.setAsk(symbol.getAsk());
            symbol2.setBid(symbol.getBid());

            oos.writeObject(symbol2);
            oos.flush();
        }

        oos.flush();
        oos.close();

        // read

        ObjectInputStream ois = new ObjectInputStream(new FileInputStream(new File("test.ser")));

        try {
            Object obj = null;
            while((obj = ois.readObject())!=null){
                System.out.println((SymbolSerializable)obj);
            }
        } catch (EOFException e) {
            System.out.println("All items read");
        } catch(Exception e){
            e.printStackTrace();
        } finally {
            ois.close();
        }

    }

}

package ca.sebastiendionne.demo;

import java.io.EOFException;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import ca.sebastiendionne.demo.model.SymbolSerializable;

public class SerializationWithReset {

    /**
     * @param args
     */
    public static void main(String[] args) throws Exception {

        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(new File("test.ser"))); 

        SymbolSerializable symbol = new SymbolSerializable();

        // dummy values
        symbol.setAsk(new Double(-1));
        symbol.setBid(new Double(-1));

        for(int i=0;i<10;i++){
            // update values
            symbol.setAsk(new Double(i));
            symbol.setBid(new Double(i));

            oos.writeObject(symbol);
            oos.flush();
            oos.reset(); // magic line
        }

        oos.flush();
        oos.close();

        // read

        ObjectInputStream ois = new ObjectInputStream(new FileInputStream(new File("test.ser")));

        try {
            Object obj = null;
            while((obj = ois.readObject())!=null){
                System.out.println((SymbolSerializable)obj);
            }
        } catch (EOFException e) {
            System.out.println("All items read");
        } catch(Exception e){
            e.printStackTrace();
        } finally {
            ois.close();
        }

    }

}

You can follow me on Twitter : http://twitter.com/survivant

Content available at: http://blogs.sun.com/arungupta/entry/qa_4_java_ee_6

An update on some recent News on
JavaOne 2010.
As you know
JavaOne San Francisco is Sep 19-23, 2010.
The
Official page
has links to the
Registration Page
and the
Online Catalog.
News updates include:

More related news are tagged
JavaOne.

Rabu, 24 Maret 2010 ngoprek Java diisi saudara ghalih semester 2, pada saat itu peserta yang hadir cukup banyak sehingga suasana di labsi begitu meriah.
disini yang dibahas adalah membuat aplikasi konversi angka dengan Netbean java dan materi dapat dilihat di File materi Java

The introduction of the Google App Engine saw a wave of frameworks emerge to facilitate developing applications targeted for it. The Gaelyk framework, one such framework written in Groovy,nbsp;eases development of lightweight applicationsnbsp;that leverage a datastore. And the scalability you can achieve is impressive.