April '08 Cleveland Java Users Group Meeting
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Scott Seighman
Apr 2, 2008, 3:34:09 PM4/2/08
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Hi All,
Just a reminder, our monthly scheduled meeting will be held next Wednesday, April 9th at 5:30PM (pizza and drinks) with the discussion beginning at 6:00PM (see map for meeting location: http://www.clevelandjava.org/map.html).
David Caldwell (bio below) will be presenting Patterns for Integrating Java™ and JavaScript™ Technology: Tales from the Front Lines. Dynamic (or "scripting") languages are growing enormously in mind share and popularity. The combined use of Java and dynamic languages on the Java platform can boost developer productivity considerably. In this session, David examines several patterns for including dynamic languages in a Java technology-based project (see detailed abstract below).
David will be presenting this topic during JavaOne in May so I'm certain he would appreciate feedback from the group as he prepares for the conference.
The agenda:
Scott
David's Bio
David Caldwell is a Java consultant with over 10 years of experience building and architecting Java technology applications, mostly for large corporate clients. He is also an active participant in the Mozilla Rhino project. Rhino is a JavaScript interpreter which runs on the Java platform, and provides the basis for the bundled JavaScript implementation included in JDK 6. David is the primary author of its support for the E4X (or ECMA-357) standard. E4X is a JavaScript language extension which adds XML types to JavaScript's native type system and provides a powerful, terse syntax for manipulating and processing XML values.
David is an experienced speaker and trainer, having taught Java classes in corporate and academic settings and conducted political skills training for activist organizations around the United States.
Abstract
One of the hottest trends in the Java™ community is the exploding use of scripting languages as a way to add more development options to the Java technology ecosystem. A series of dynamic languages is available for the Java platform, including ports of languages such as Python and Ruby (Jython and JRuby) and new languages for the Java platform such as Groovy and Scala. These dynamic languages run in the Java virtual machine and typically allow access to the underlying Java technology-based runtime and Java platform APIs along with a looser type system, runtime interpretation, and the ability to embed a language interpreter inside a larger application so that scripting can be used to add dynamism to a Java platform or Java technology-based application. JSR 223 (Scripting for the Java Platform) standardized a set of bindings and an API that scripting engines could implement to let Java technology-based programs discover their capabilities and execute them at runtime.
Arguably the granddaddy of the JVM™ machine dynamic language implementations is the Mozilla Foundation’s Rhino JavaScript™ technology-based interpreter. A version of Rhino is bundled with JDK™ release 6 as the only preinstalled scripting engine. Rhino is used in many other projects, including Project Phobos, an initiative that lets developers leverage JavaScript technology from within the GlassFish™ project’s Java Platform, Enterprise Edition (Java EE platform) environment.
For adding scripting languages to the toolbox, what is the best way to integrate them into the development process? Most developers probably start using scripting languages because they allow “exploratory programming,” executing individual lines of code that create and invoke methods on Java technology-based objects with instant feedback. But more-complex uses of scripting technologies raise questions about how exactly to draw the line between Java language code and scripting language code and how to get the most out of both tools while minimizing the impedance mismatch a multilanguage application creates.
This session’s speaker, David Caldwell, is one of the developers on the Rhino project and has been using Rhino in various ways to add more agility and dynamic behavior to several Java technology-based projects. In this session, he examines several patterns for including dynamic languages in a Java technology-based project:
Just a reminder, our monthly scheduled meeting will be held next Wednesday, April 9th at 5:30PM (pizza and drinks) with the discussion beginning at 6:00PM (see map for meeting location: http://www.clevelandjava.org/map.html).
David Caldwell (bio below) will be presenting Patterns for Integrating Java™ and JavaScript™ Technology: Tales from the Front Lines. Dynamic (or "scripting") languages are growing enormously in mind share and popularity. The combined use of Java and dynamic languages on the Java platform can boost developer productivity considerably. In this session, David examines several patterns for including dynamic languages in a Java technology-based project (see detailed abstract below).
David will be presenting this topic during JavaOne in May so I'm certain he would appreciate feedback from the group as he prepares for the conference.
The agenda:
- Eat, Drink, Network (5:30-6:00 PM)
- March Meeting Recap (6:00-6:20 PM)
- News Items (6:20-6:30 PM)
- Patterns for Integrating Java™ and JavaScript™ Technology:
Tales from the Front Lines (6:30-8:00 PM)
Scott
David's Bio
David Caldwell is a Java consultant with over 10 years of experience building and architecting Java technology applications, mostly for large corporate clients. He is also an active participant in the Mozilla Rhino project. Rhino is a JavaScript interpreter which runs on the Java platform, and provides the basis for the bundled JavaScript implementation included in JDK 6. David is the primary author of its support for the E4X (or ECMA-357) standard. E4X is a JavaScript language extension which adds XML types to JavaScript's native type system and provides a powerful, terse syntax for manipulating and processing XML values.
David is an experienced speaker and trainer, having taught Java classes in corporate and academic settings and conducted political skills training for activist organizations around the United States.
Abstract
One of the hottest trends in the Java™ community is the exploding use of scripting languages as a way to add more development options to the Java technology ecosystem. A series of dynamic languages is available for the Java platform, including ports of languages such as Python and Ruby (Jython and JRuby) and new languages for the Java platform such as Groovy and Scala. These dynamic languages run in the Java virtual machine and typically allow access to the underlying Java technology-based runtime and Java platform APIs along with a looser type system, runtime interpretation, and the ability to embed a language interpreter inside a larger application so that scripting can be used to add dynamism to a Java platform or Java technology-based application. JSR 223 (Scripting for the Java Platform) standardized a set of bindings and an API that scripting engines could implement to let Java technology-based programs discover their capabilities and execute them at runtime.
Arguably the granddaddy of the JVM™ machine dynamic language implementations is the Mozilla Foundation’s Rhino JavaScript™ technology-based interpreter. A version of Rhino is bundled with JDK™ release 6 as the only preinstalled scripting engine. Rhino is used in many other projects, including Project Phobos, an initiative that lets developers leverage JavaScript technology from within the GlassFish™ project’s Java Platform, Enterprise Edition (Java EE platform) environment.
For adding scripting languages to the toolbox, what is the best way to integrate them into the development process? Most developers probably start using scripting languages because they allow “exploratory programming,” executing individual lines of code that create and invoke methods on Java technology-based objects with instant feedback. But more-complex uses of scripting technologies raise questions about how exactly to draw the line between Java language code and scripting language code and how to get the most out of both tools while minimizing the impedance mismatch a multilanguage application creates.
This session’s speaker, David Caldwell, is one of the developers on the Rhino project and has been using Rhino in various ways to add more agility and dynamic behavior to several Java technology-based projects. In this session, he examines several patterns for including dynamic languages in a Java technology-based project:
- Using the JavaScript programming language as the primary programming language and creating Java technology-based objects on demand to leverage the underlying platform
- Using a peer-based architecture, in which objects from the scripting language add dynamic behavior to a Java technology-based “peer” instance
- Using the Java programming language as the primary programming language and the JavaScript programming language to extend abstract Java classes
- Creating a script per operation and generating a unique scope for each operation, with access to the appropriate Java technology-based objects and methods
-- Scott Seighman Systems Engineer Sun Microsystems 877.450.8885 scott.s...@sun.com
Scott Seighman
Apr 8, 2008, 10:20:42 AM4/8/08
to clev...@caladin.urbancode.com, cleveland-jav...@googlegroups.com
Hi All,
Just a reminder, our monthly scheduled meeting will be held tomorrow, Wednesday, April 9th at 5:30PM (pizza and drinks) with the discussion beginning at 6:00PM (see map for meeting location: http://www.clevelandjava.org/map.html).
-- Scott Seighman Sun Microsystems 877.450.8885 scott.s...@sun.com
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