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Questions tagged [jakarta-ee]

Jakarta EE (formerly known as Java Enterprise Edition, Java EE, and J2EE) is a specification defining a collection of Java-based server and client technologies and how they interoperate. This is the master tag. For more specific API questions, please use [jsf], [servlets], [jpa], [cdi], [ejb], etc.

Java Enterprise Edition (Java EE) is a specification defining a collection of Java-based technologies and how they interoperate. Java EE specifies server and client architectures and uses profiles to define technology sets targeted at specific classes of applications. Numerous implementations are available in the form of both commercial products and open source projects. It is also possible to assemble full or partial implementations using constituent components.

From the Java EE 6 specification:

All Java EE profiles share a set of common features, such as naming and resource injection, packaging rules, security requirements, etc. This guarantees a degree of uniformity across all products, and indirectly applications, that fall under the "Java EE platform" umbrella. This also ensures that developers who are familiar with a certain profile, or with the full platform, can move easily to other profiles, avoiding excessive compartmentalization of skills and experience.

Java EE is currently migrating to the Eclipse Foundation under the top-level project EE4J, with the intent of introducing a more open community process with a faster release cycle. Under this process, Java EE has been rebranded as Jakarta EE.

References

Specifications


Official documentation


Official tutorials


Java EE learning resources


Java EE version history


Java EE on Social Media

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Can someone explain mappedBy in JPA and Hibernate?

I am new to hibernate and need to use one-to-many and many-to-one relations. It is a bi-directional relationship in my objects, so that I can traverse from either direction. mappedBy is the recommended way to go about it, however, I couldn't…
brainydexter
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How to change context root of a dynamic web project in Eclipse?

I developed a dynamic web project in Eclipse. I can access the app through my browser using the following URL: http://localhost:8080/MyDynamicWebApp I want to change the access URL to: http://localhost:8080/app To do so, I changed the context…
Amit
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Intellij IDEA Java classes not auto compiling on save

Yesterday I switched to IntelliJ IDEA from Eclipse. I am using JRebel with WebSphere Server 7 as well. Everything now seems to be working somewhat fine, except that when I modify a Java file, and hit save, IntelliJ does not re-compile the file, in…
mjs
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Please explain about insertable=false and updatable=false in reference to the JPA @Column annotation

If a field is annotated insertable=false, updatable=false, doesn't it mean that you cannot insert value nor change the existing value? Why would you want to do that? @Entity public class Person { @Id @GeneratedValue(strategy =…
Thang Pham
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What is the difference between Spring, Struts, Hibernate, JavaServer Faces, Tapestry?

May I know what is the difference between:- Spring Struts Struts 2 Hibernate JavaServer Faces JavaServer Pages Tapestry Are these technologies/framework complementary to each other? Or they are alternatives to each other (after I use one of them,…
CMW
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Could not calculate build plan: Plugin org.apache.maven.plugins:maven-resources-plugin:2.5 or one of its dependencies could not be resolved

org.apache.maven.plugin.PluginResolutionException: Plugin org.apache.maven.plugins:maven-resources-plugin:2.5 or one of its dependencies could not be resolved: Failed to read artifact descriptor for…
Curt
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What exactly is Java EE?

I have been doing Java SE for some years now and moving on to Java EE. However, I have some trouble understanding some aspects of Java EE. Is Java EE just a specification? What I mean is: Is EJB Java EE? Are EJB/Spring different implementations…
Frank Zimmer
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How to define servlet filter order of execution using annotations in WAR

If we define webapp specific servlet filters in WAR's own web.xml, then the order of execution of the filters will be the same as the order in which they are defined in the web.xml. But, if we define those filters using @WebFilter annotation, what…
siva636
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EJB's - when to use Remote and/or local interfaces?

I'm very new to Java EE and I'm trying to understand the concept of Local interfaces and Remote interfaces. I've been told that one of the big advantages of Java EE is that it is easy to scale (which I believe means you can deploy different…
Brian DiCasa
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What does the servlet value signify

I am getting a bit confused here. In our application we are having a few servlets defined. Here is the excerpt from the web.xml for one of the servlets: AxisServlet Apache-Axis…
Vini
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Deploying Maven project throws java.util.zip.ZipException: invalid LOC header (bad signature)

I am getting the below exception when I run my mvn install. I have even deleted the local repository and ran again getting same exception. [ERROR] Failed to execute goal org.apache.maven.plugins:maven-shade-plugin:2.1:shade (default) on project…
Karthick
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Should I use @EJB or @Inject

I have found this question: What is the difference between @Inject and @EJB but I did not get any wiser. I have not done Java EE before nor do I have experience with dependency injection so I do not understand what I should use? Is @EJB an old way…
LuckyLuke
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What is an EJB, and what does it do?

Been trying to learn what EJB beans are, what does it mean their instances are managed in a pool, blah blah. Really can't get a good grip of them. Can you explain me what they really are (practically for a Java Programmer)? What do they do? Which…
jacktrades
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Performing user authentication in Java EE / JSF using j_security_check

I'm wondering what the current approach is regarding user authentication for a web application making use of JSF 2.0 (and if any components do exist) and Java EE 6 core mechanisms (login/check permissions/logouts) with user information hold in a JPA…
ngeek
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How can a JACC provider use the Principal-to-role mapping facilities of the server it's deployed on?

I am writing a JACC provider. Along the way, this means implementing a PolicyConfiguration. The PolicyConfiguration is responsible for accepting configuration information from the application server, such as which permissions accrue to which roles. …
Laird Nelson
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