n002213f - Developer IT

How to use Enum as NamedQuery parameters in JPA

- by n002213f

I have an Entity with a enum attribute and a couple on NamedQueries. One of these NamedQueries has a the enum attribute as a parameter i.e. SELECT m FROM Message m WHERE status = :status When i try to ru n the query i get the following error; Caused by: java.lang.IllegalArgumentException: You have attempted to set a value of type class my.package.Status for parameter status with expected type of class my.package.Status from query string SELECT m FROM Message m WHERE m.status = :status. I'm using Toplink How is this? How would i make JPA happy?

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Playframework and Django

- by n002213f

I have worked with Django before and have recently seen the Play framework. Is this the Java community's answer to Django? Any experiences with it? Any performance comparisons with other Java web frameworks? Edit:Almost similar to http://stackoverflow.com/questions/1597086/any-experience-with-play-java-web-development-framework, the responses, unfortunately don't say much about the framework.

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How is this Quartz Cron Expression executed

- by n002213f

I have a the following; private String cronExpression = ""; private final String jobID = "MyJObID"; ... Scheduler scheduler = ServiceLocator.getInstance().getScheduler(); CronTrigger trigger = new CronTrigger(jobID , Scheduler.DEFAULT_GROUP, cronExpression); JobDetail jobDetail = new JobDetail(jobID , Scheduler.DEFAULT_GROUP, MyJob.class); scheduler.scheduleJob(jobDetail, trigger); My question is when is this job triggered for the empty cron expression?

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Error executing IBM DB2 Stored Proceedure in EJB container

- by n002213f

I'm getting the error below when i try to execute a stored procedure in a Stateless bean with container managed persistance; com.ibm.db2.jcc.am.SqlException: DB2 SQL Error: SQLCODE=-751, SQLSTATE=38003, SQLERRMC=STORED PROCEDURE;FXTR324;FXTR324;COMMIT, DRIVER=4.7.85 The stored proc executes without errors if i manually create the connection the database, i.e. unmanaged transaction. Is there anything i need to do for it to execute in the EJB bean?

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Focused animation on custom JDialog

- by n002213f

If a JFrame has a JDialog modal open, the JDialog is animated (the borders and title bar have a lighter colour) if any other part of the application is clicked other than the JDialog with focus. The user is made aware of the window in focus to attend to first. I have a Swing application with custom dialogs, setUndecorated(true) and custom title bars. Is it possible to implement the behaviour described above for these custome dialogs?

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Create div with title header

- by n002213f

How would i create the below using pure CSS (no images, no tables, no javascript)?

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Can i use Spring on GAE?

- by n002213f

Can i use Spring Webflow/MVC and Spring Security and Hibernate on Google App Engine? Is there a list/summary of java frameworks that can be used on the GAE?

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Disabling JComboBox and retaining original item list

- by n002213f

My action listener on a JComboBox invokes a thread. I would like the component to be disabled until the thread completes. I have tried calling seEnabled(false) when the thread start and setEnabled(true) when it completes. Unfortunately setEnabled(false) clears the combo box list as well. Is there a way of disabling the component but retain the original list?

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Messaging strategies to connect different systems

- by n002213f

I have a system to handle Applications online and a different system to send SMS/Email notifications to applicants on completion using web services. I can't guarantee the availability of the SMS/Email gateway. Option 1 After an application is complete, place a message on a JMS queue. A Message Driven bean receives the message and make a call for the web service, if it fails leave the message on the queue. I suspect (please correct if incorrect) that if the gate way is offline the continuosly try to send the message which might use up valuable resources. Can the above option be refined are are there any other messaging strategies that can be used?

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Regex for files in a directory

- by n002213f

Is it possible to use a regular expression to get filenames for files matching a given pattern in a directory without having to manually loop through all the files.

Developer IT