The Problem After generating the MANIFEST.MF with the Apache Felix Maven Bundle Plugin (BND) for an eclipse project, eclipse warns that "No required execution environment has been set". The Solution The solution is to add an instruction to the configuration of the maven bundle plugin and explicity
Many different solutions to persistence follow a similar structure: a hierarchical organization into files and folders. It appears sensible to access these representations using a common application interface. Initially, I implemented my own little library, which was capable of accessing files on the hard disk and keeping them in memory.
There are a number of different ways in which objects or object graphs can be serialized and deserialzed in Java. One major distinguishing feature is the intrusiveness of the employed framework. Some, like XStream, can work with any Java object without modification. Others, like JDO, beans serialization frameworks or the
In some circumstances, for instance if you want to transfere objects via GWT RPC, it makes sense to assert Objects can be serialized and deserialized without problems. Further there might be some differences between the original object and the deserialized object - for instance some hash tags might have changed
The Problem: You have a number of projects in an eclipse workspace. You have had bad expierences with eclipse Maven plugins like m2maven and eclipse IAM. You usually trigger Maven from the command line but now for convienience you just want one command with which you can compile all the
The Java world is in movement. After Oracle‘s purchase of Sun there is a great amount of uncertainty regarding the future of this programming language. How can we deal with this uncertainty? One approach is to understand that Java is not Java. Indeed, the way we write Java code
There are surprisingly few frameworks, which allow to persist and query Java objects independent of relational database management systems. To me, at least for implementations not bound to using existing relational databases, storing information in interrelated tables seems an arbitrary step in object-oriented development. Below a few links ... Frameworks/Technologies
Abstract: The largest parts of the Hamcrest library can be compiled in GWT. Just the IsInstanceOf class needs a bit of tweaking (as well as some other classes depending on reflection). The following provides a brief overview of some of the steps required to compile Hamcrest with GWT. 1. 1.
Problem In its 2.0 version, it seems that Restlet has no built in support for HTTPS (see internal connectors). If trying to add a new server with the HTTPS protocol Server server1 = component.getServers().add(Protocol.HTTPS, "localhost", 8183); A warning will be thrown and the server
Problem Restlet works well with GWT RPC calls. However, for GWT‘s RPC deserialization mechanism, the classes of transmitted objects must reside in the servlet‘s thread classloader. In an OSGi environment, the classes, which need to be deserialized often reside within a different bundle than the servlet. This leads
Problem After adding a dependency to a GWT module, which is declared as Maven dependency, GWT Maven plugin does not compile correctly. [INFO] ------------------------------------------------------------------------ [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] GWT Module org.restlet.Restlet not found in project sources or resources. [INFO] ------------------------------------------------------------------------ Solution The solutio
After some difficulties I got a project working, which consists of a simple GWT application with a Restlet backend. The application consists of four OSGi bundles, which work inside eclipse PDE. Also, all of these modules and their dependencies are declared using Maven 2. Overview: The user interface is based