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Unit tests are written to be repeatable, so they must clean up after themselves Obviously, this is much easier when the test doesn t rely on external resources (which are often harder to clean up or restore) Test smallest unit of code: A unit test must test the smallest unit of code possible in order to isolate the code under test In object-oriented programming, this unit is usually a method of an object or class Writing unit tests such that a method is tested independently of other methods reduces the number of code lines that could contain the potential bug..

= timerService.createTimer( 1000, arguments );

If the first match displayed isn t the correct one, you can press N to see further matches, as you would in vi, until you find the command you re looking for I have been using this method to work at the prompt for a long time, and my fingers are accustomed to moving to the correct keys This has improved my speed and agility immensely when working at the command line If you re not comfortable with the vi editor, I recommend practicing; vi is the default text editor on UNIX/Linux systems, and you ll certainly have to use it at some point Although learning the vi editor is not the easiest thing to do, once you are comfortable with it you will be amazed at how powerful it is There is also an emacs editing mode available.

Caution Obviously, Spring applications rely heavily upon the ApplicationContext and its XML configuration files at runtime. Your unit tests, however, should not rely on these facilities. Many if not all of Spring s practices promote the ability to run your code outside of Spring itself. Your code should always be able to be unit tested without the ApplicationContext s involvement. To test the wiring and configuration of your system, see Integration Tests later in this chapter.

public void ejbTimeout(Timer timer) { Serializable arguments = timer.getInfo(); //perform business logic below (not shown) } }

I recommend the vi mode if you have no previous experience, mainly because it is a more standard tool and is available on all systems If you re a fan of emacs and comfortable with that editor, then by all means use the emacs mode The goal here is to become quicker and more efficient..

<input type="checkbox" name="city" value="NYC" > New York City <br> <input type="checkbox" name="city" value="PAR" > Paris <br>

Creating a session bean like this one allows a client to create a process to execute business logic without having to stick around and wait for it to complete. The client merely invokes the startProcess() method. The startProcess() method accepts a Serializable object as arguments to the business process. When the startProcess() method returns, the client simply continues with other work. The timer started by the startProcess() method will eventually time out; the recipe sets it for 1 second and invokes the callback method on the session bean. The ejbTimeout() callback method contains the actual business logic for execution. The session bean pulls out any arguments from the Timer instance and executes the business logic. Using the timer service in this way enables you to create asynchronous processes without the use of JMS and message-driven beans.

You can configure vi editing for either ksh or bash systemwide or for individual users. You can also configure it right at the command prompt if you like.

By default, all of the Spring macros will close input field tags with the HTML 4 compliant tag closure >. Tip

4.1 Retrieving an environment variable 4.5 Sending an email from an EJB 4.6 Using the EJB 2.1 timer service

With bash there are a few ways to enable the vi editing mode. The first is to modify the inputrc file. There is a systemwide /etc/inputrc file that all users use who have bash set as their shell. There is also an individual .bashrc file that is usually kept in the user s home directory. Adding the following line to one of those two files will enable vi mode:

If your templates should be XHTML compliant, you can instruct the macros to use XHTML tag closures /> by setting a variable in the template. For Velocity, place the line #set($springXhtmlCompliant = "true") in your template before calling any of the macros. For FreeMarker, use <#assign xhtmlCompliant = true in spring>.

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