Apache Qpid
· Apache Qpid™ makes messaging tools that speak AMQP and support many languages and platforms. AMQP is an open internet protocol for reliably sending and receiving messages. It makes it possible for everyone to build a diverse, coherent messaging ecosystem.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window qpid-parent-1.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.
