To build, run gradle build. Then cd into build/classes/java/main.

Run messaging nodes and registry on separate machines.

Files:
.
├── build.gradle    [Builds the applications]
├── README.txt      [This file]
└── src
    └── main
        └── java
            └── csx55
                └── overlay
                    ├── dijkstra
                    │   ├── Graph.java                          [Graph implementation for use in ShortestPath.java]
                    │   └── ShortestPath.java                   [Finds the shortest path between messaging nodes]
                    ├── node
                    │   ├── MessagingNode.java                  [MessagingNode application, joins the overlay and sends messages to other messaging nodes]
                    │   ├── Node.java                           [Base class for nodes, provides core functionality]
                    │   └── Registry.java                       [Registry application, sets up the overlay and initiates tasks]
                    ├── transport
                    │   ├── TCPReceiverThread.java              [Reads input from sockets without blocking the main thread]
                    │   ├── TCPSender.java                      [Sends events to other nodes]
                    │   └── TCPServerThread.java                [Listens for new TCP connections without blocking the main thread]
                    ├── util
                    │   ├── InputReceiverThread.java            [Reads input from System.in, queues input strings]
                    │   ├── OverlayCreator.java                 [Sets up the overlay as specified in the assignment]
                    │   └── StatisticsCollectorAndDisplay.java
                    └── wireformats                             [All files are events specified by the assignment unless otherwise noted]
                        ├── Deregister.java
                        ├── DeregisterResponse.java
                        ├── EventFactory.java                   [Reads events from byte arrays and returns events]
                        ├── Event.java                          [Base class for event types, uses reflection to marshall/unmarshall events]
                        ├── LinkInfo.java                       [Contains information about a link between nodes, can be printed]
                        ├── LinkWeights.java
                        ├── Message.java
                        ├── MessagingNodeInfo.java              [Contains information about a messaging node, can be printed]
                        ├── MessagingNodesList.java
                        ├── Protocol.java
                        ├── Register.java
                        ├── RegisterResponse.java
                        ├── TaskComplete.java
                        ├── TaskInitiate.java
                        ├── TaskSummaryRequest.java
                        └── TaskSummaryResponse.java