How to fix “failed to start The Apache HTTP Server” after renewing SSL certificate on AWS EC2 linux ?

If you followed my last article “How to host an https WordPress site on AWS EC2 with a Let’s Encrypt SSL certificate?”  you know have a Let’s Encrypt generated SSL certificate for your WordPress. Once in a while Let’s Encrypt will generate a new certificate if you scheduled the certbot-auto renew command. You’ll then need …

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How to duplicate a Row programmatically in Oracle ADF?

Duplicating a table row is often one of the first requirement added on big customer tables in an Oracle ADF application. To do so, add a column at the start of your row with a “duplicate” button containing an action listener as follow: … actionListener=”#{YOUR_SCOPE.YOUR_BEAN.duplicateRowLine}” … In this Action Event, you will need to copy …

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Screenshot of joke me bot conversation in messenger

How to build a Facebook Chatbot running on AWS Lambda and Claudia js Bot Builder ?

Chatbots have been around for a while now and I’ve had the opportunity to build a couple of them for clients using Oracle and AWS tools. I’m not a huge fan of brands building chatbot to use as customer support, let’s be honest, there is nothing worse than having to cope with a robot when …

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How to host an https WordPress site on AWS EC2 with a Let’s Encrypt SSL certificate ?

Hosting a WordPress blog/website on the AWS EC2 platform can be pretty useful when you know how to maintain Linux servers and want to tinker it yourself. (Free for your account first-year / then around €10/month) This is great for a small personal blog where you’ll do the maintenance and scalability yourself. (OS, databases, and …

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How to display a please wait message when the server is processing using addBusyStateListener in ADF ?

Clients often require their ADF applications to process a lot of data or upload big files when their users click on a specific button. Those treatments can often take a couple of minutes to run and your user may lose patience or wonder why the application isn’t responding. As a best practice, you should always …

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How to fix oracle.jbo.RowInconsistentException JBO-25014 : Another User Have changed the Row with Primary Key in ADF?

As described in the Oracle documentation here, ADF BC uses its own row consistency enforcement mechanism : 4.10.11 How to Protect Against Losing Simultaneously Updated Data At runtime, the framework provides automatic “lost update” detection for entity objects to ensure that a user cannot unknowingly modify data that another user has updated and committed in …

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Screenshot of an ADF 11g View Object with View Criteria

How to unapply a View Criteria programmatically from a View Object in ADF?

Yesterday, I shared a quick tip on how to apply a ViewCriteria in your ADF Controller project. ( www.cedricleruth.com/how-to-apply-a-viewcriteria-programmatically-in-adf/ ) And if you’re using this snippet, you may also need to remove this ViewCriteria from the ViewObject programmatically. A typical use case is a toggle button on top of an ADF table to only display …

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ERROR: No Java EE modules detected in EAR archive. Deployment aborted. in ADF

[03:58:41 PM] Deployment cancelled. [03:58:41 PM] —- Deployment incomplete —-. [03:58:41 PM] == ERROR: No Java EE modules detected in EAR archive. Deployment aborted. == (oracle.jdevimpl.deploy.ear.WeblogicAssembler) This error occurs when you first try to deploy your application in Oracle ADF. To fix it do as follow: Go to the Application properties Go to Deployment Select …

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