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11

Maven driven compile time ehnancement

: javax/servlet/ServletContextListener at java.lang.ClassLoader.defineClass1(Native Method) at java ... .ClassNotFoundException: javax.servlet.ServletContextListener at java.lang.ClassLoader.findClass(ClassLoader.java
11

the tutorial netbeans and javaee6 dont work,

problems: The servlet is empty - it seems that you missed step 4. There is an unnecessary web.xml file in WEB-INF. To fix the project you should: Fix the servlet following step 4. Delete the web.xml
11

A lot of ENT and SIV instances which are not cleared by GC

simple EJB managers containing EntityManagers. On bean's PreDestroy and in servlet's i make ... (HttpRequestContextImpl.java:70) at org.jboss.weld.servlet.WeldListener.requestDestroyed(WeldListener.java:154
11

Eclipse/JPA database tutorial

Azam Maybe you ran the JSP as your main page rather than the servlet? In this example the servlet sets
11

use of Singleton into tomcat

of singleton for manage all operation on database. I get a instance of it into multiple servlet. but into ... me please......... i know that the servlet it multi.tread ad so the operation on db it not thread-safe
8

Object belongs to another EntityManager - ERROR

.service(VaadinServlet.java:238) 10:29:15,006 ERROR [stderr] (http--10.23.3.98-8081-5) at javax.servlet
8

Optimistic locking: prevent version increment on entity collection attribute

. Also, each of my calls to the server is made in a transaction (the entry point in the servlet
8

Attempt to begin a new transaction when a transaction is active

it from fulfilling this request. exception javax.servlet.ServletException: com.objectdb.o
8

What are the steps of creating small web app?

Hello guys, I have a question about creating small new web application, I am almost done with researching and studying and I have covered all the important concepts e.g. # Starting from web technologies: HTML, CSS, JS, JQuery. # Moving to Java Technologies: Core Java, Servlet, Managed Beans, JSF
2

NullpointerException at a normal select

.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet [se.tjanstelogik

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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