Jython

In other words, we take advantage of Jython's interpreter and can derive a little testing language like this for Joe.

The command line interface, described in Part 1, provides a Jython interface with which commonly performed tasks can be automated.

The Jython interpreter helps with rapid code development by allowing you to run code without compilation.

In the meantime, of course, there's lots more to be said about Jython, but it would take a book.

To run the Jython code samples in this article, you will need to have both Jython and a JRE installed.

The Jython script programming model highlights the scripting objects and WebSphere Application Server library; it's shown in Figure 2.

Uche illustrates the differences by providing samples of Java library access, as well as the Jython interpreter shell and code files.

The Jython team provided one of the first contributions with the code for Jython's package caching mechanism.

The Jython syntax for the wsadmin tool is the strategic direction for WebSphere Application Server administrative automation.

To run the Jython script you just created, complete the following steps, as shown in Figure 18.

If adopting Jython were a major concern, it'd be possible to nevertheless make headway on the original problem without it.

Next, you use the Jython API to extract that list out of the Python runtime environment.

Jython is an implementation of the high-level, dynamic, object-oriented (OO) language, Python.

The tutorial includes detailed instructions for getting and installing Jython on your system.

He also has written many good articles, and he? s got links to all of them here (including articles on Jython, Java vs. . NET, etc. ).

Support for the Jython scripting engine used to execute test scripts.

The complexity, however, is mitigated by Jython itself: Jython is well tested and supported, and is open source.

Note that you need to separately download Jython, Java runtime, JFreeChart, and JDBC drivers for the databases.

Jython is freely available for both commercial and non-commercial use and is distributed with source code.

After that we will demonstrate several examples for querying and a QA tool using batch inserting in Jython.

Alternatively, if you plan on redeploying throughout your development cycle, you'll want to consider setting up a Jython wsadmin script.

The Jython interpreter will also support many shortcuts, which will enable it to use existing Java libraries.

Specifically, the PyDev debugger does not currently support Jython.

Thereafter, with the help of data binding and method annotations, an XML schema is generated for the Jython service.

Now that all the scripts and xml files have been created, it's time to register the custom widget by running the Jython scripts.

This retrieved information is passed on to the Jython service where an AXIOM is created from the returned object.

I'll end this introduction to Jython with a more complex program that creates a GUI.

Blocks of code in Jython are always marked with indentation rather than, say, curly braces.

Despite these shortcomings, you can still develop Jython scripts to complete common computing by Jython modules.

And it is convenient if you add the Jython installation path to your PATH environment variable on your platform.

In this example, the archive contains two files, an EAR file and a Jython script, appInstall. jy.

This panel shows the wsadmin scripting command for importing an asset, provided in the Jython scripting language.

You may be familiar with closures if you've done any coding in Python or Jython, where a closure is introduced using the lambda keyword.

Choosing Jython as your scripting language lets you easily interact with Java and use the Struts framework classes.

To run the sample in this article, you need have Jython 2. 1 or higher installed on your development system.

However, a problem will arise if the business logic is in Jython.

You do not need to enclose the function name in quotes, because the function is an object in Jython.

Again, as with other wsadmin scripting commands, these commands are also available in Jython.

And shows how flexible Jython function declaration can be.

When working with Jython scripts, always use double backslashes to specify a separator in file paths.

Jython is distributed as a single Java class file containing the installer.

We will also be making sure that even more applications and frameworks will work on Jython.

These differences determine that Jython scripts can't run as CPython scripts run, as expected.

For UNIX platforms, you may want to add the chosen Jython installation path to your PATH environment variable.

Jython seemed like the obvious choice at first, except that it hasn't had much momentum since around 2001.

Import the manager module: type from manager import * in the Jython interpreter.

The BlueSpace wall display clients discussed in this article were written in Jython.

If you're a Python programmer, you might initially find it awkward to use the wsadmin tool in Jython.

Create another folder called install and place the Jython scripts in it.

If you run into problems with the installation, see the installation information page on the Jython Web site.

This list gives you a good overview of the structural utility of Jython.

The Jython language reduces the amount of code required to perform tasks.

Jython gives you the freedom to do this by importing the module provided by this article into your own module.

He can write scripts like this in a snap without knowing he is making Jython function calls.

He also provides a link to an indepth presentation on scripting VI with Jython.

Again, this complete Jython program reveals some key features of Jython.

The monkeyrunner tool uses Jython, a implementation of Python that uses the Java programming language.

Jython expressions are similar to Java expressions.

Which covers 11 specific features of Jython that can be particularly time saving or exciting for Java programmers.

When you input the code from Listing 1 into the Jython interpreter interaction console, the result is shown on the console.

Since we have to perform XML schema generation, we must annotate our Jython script.

You can also save this code fragment as a Jython script file with the extension . py.

Jython allows the monkeyrunner API to interact easily with the Android framework.

You realize that Jython has exactly the same str==unicode issue, right?

In Jython (as in Python) source files use the extension "py" .

Jython syntax is also quite advantageous when exploring new GUI designs.

After he did some research, he found Jython was handy and right for the job.

As such, my exploration of Jython will focus on the productivity enhancements it can lend to your Java programming efforts.

Function and not as a method; this is a Jython idiom and is common in many languages.

For instance, Joe can create three new employees in the SAMPLE database by running "jython batchinsert. jy joescript. txt" .

Also, proxy configuration changes can be scripted in languages such as Jython, using the Jython tools in the Application Server Toolkit.

Jython string can use either single or double quotes.

An annotated Jython method is given in the example below.

You must have Jython 2. 1 or higher installed on your development system to complete this tutorial.

In this mode, you initiate the session and provides a Jython script file by using the -f argument.

Install Jython 2. 1 if you haven't already (see Resources for a link).

Jython provides the statement types summarized in Table 1.

Put it in a file with a useful name, such as verboseGC_on. jython.

With Jython, we can have Joe write his own script with little effort.

Jython has a buit in function called execfile(filename).

Start Jython, and verify that it is running and using the correct version of Java (see the area circled in Figure 1).

I think I prefer the readlines-style of jEdit's Jython or the Python shell.

To install it, download jython-21. class file and execute java jython-21.

Run select1. jy from a cmd console "jython select1. jy" .

You must import the manager. py module each time you start Jython in order to use the functions contained in the module.

Based on these steps, the Jython script is developed as Listing 11 shows.

Because Jython 2. 1 was released in early 2001, it doesn't support many popular technologies and industry standards.

Some built-in extension modules don't exist in Jython, such as win32com, Tkinter, socket, and logging.

It takes quite a long time to master it and develop a script based only on the Jython modules.

String operations are extensive and easily accessed (for example, x == y in Jython is the same as x. equals(y) in the Java language).

For example, Jython's raise statement is the same as the Java language's throw statement.

For example, you can generate the static route file via scripting by using the Jython commands shown in Listing 1.

Here we will show how to connect to the SAMPLE database in Jython with the popular type 2 and type 4 drivers.

Are you seeing Jython being adopted for more enterprise applications?

There are some restrictions on the Jython modules compiled in this way, but that issue is outside the scope of this article.

Now we will see how to insert in Jython.

If using Jacl, the syntax is similar to the Jython commands above, the main difference being the replacement of brackets with braces

(Jython does not use line numbers, but this example shows them strictly for explanatory purposes. )

Some experimentation at the interactive Jython prompt should help you familiarize yourself with this tool

The wsadmin tool supports two scripting languages: Jacl and Jython. Five objects are available when you use scripts

Jython is interesting to Java programmers for several reasons

Create the Jython script file for endpoint registration

Create the Jython script for catalog registration

The most frequently used Jython data types are described below

create a file called my. jacl (or a jython file if you prefer) with these commands

When deploying a Jython script, you must follow the guidelines given below

Jython is dynamic typed thus no need to declare the type for

Or, you can run the program by using the more convenient Jython script below

A side goal of Jython 2. 5 is to try to get some CPython frameworks working, especially the web frameworks, for example