Java Spring Boot MVC and JSP with Maven and Visual Studio Code

In this tutorial I will explain step by step how to create from scratch a working Spring Boot MVC application, with JSP, using Maven and configure Visual Studio Code in order to develop and debug while using Hot Swap feature.

Hibernate - Cannot insert explicit value for identity column in table 'MYTABLE' when IDENTITY_INSERT is set to OFF

When using Hibernate targeting an SQL Server database could happen to have the error "Cannot insert explicit value for identity column in table 'MYTABLE' when IDENTITY_INSERT is set to OFF".
Here is how to deal with that.

Maven copy configuration file or resource in target classes directory

Although building a maven project you have to use a specific directory for resources, there are some cases that you have to keep a resource in a different directory. If you put a .properties file in src or into a java package, maven will not copy that file in the target classes directory, so in your deployment package it will not be present. Here is the procedure to force the copy and make it works.

Maven, create an executable jar with all dependencies

You want to package your java application, i.e a console application, into a single jar that you can easily run from command line. Assume you have used Maven as dependency manager, here is the needed configuration.

Install Oracle TopLink in Maven local repository

Oracle TopLink is not available in any online repository. In order to use it in a maven project you have to install these libraries in a local maven repository. Here is the procedure to download and install them.

Configure JNDI Mail Session with WebLogic and Spring, Gmail

In this tutorial I will explain how to configure a JNDI mail session using Oracle WebLogic 12c and Spring Framework and how to send email from a Java web application. In this example we will use GMail as smtp service.

Create a Vaadin Portlet for Liferay

In this tutorial will be explained how to create a Vaadin Portlet for Liferay Portal from scratch.
We will use Eclipse Juno (but it applies to next versions as well), a Liferay Portal installation (version 6.1 in this tutorial) and the RIA framework Vaadin.

Liferay Tomcat as windows service

When Liferay Portal is bundled with Tomcat, it can be started as a windows service, so it can be automatically started at computer startup, without being logged in as windows user and without manually start through "startup.bat".
The procedure applies to a normal Tomcat installation as well, also without Liferay Portal.

Vaadin style not being applied to textfield

In Vaadin 6.8.6 I noticed that after declaring a TextField and after adding a style name, in some cases style doesn't apply in textfield.
I noticed that the issue was just on a TextField and I realized that the method "focus" strangely makes the style disappear.