The maintainers want to collect all the messages send by industry machines(such as measurement machine, Microscope etc.) imedicatly. So we use one websocket server to commucate with the machines to receive and store the upload messages(called push websocket), and we use another websocket for maintainers to read the imedicate messages(called read websocket). Of course, the maintainers will receive history message when he/she login. This is the demo for the scenario above.It helps the maintainer to ingest and store the data, finally exposing it to the frontend dev team via a JSON - based API.

The development of this project is based on the Java language, and the specific environment includes:

Java: Java 7+
Maven: 3
Spring: Spring MVC 4.3.10+

This is a demo project, so I use of local file instead of formal DBMS to store and retrive infos.

function: the read websocket to expose it to the frontend dev team via a JSON.

machineId: the param is machine Id of the specified machine which maintainer want read from, and it is unique identiy, you can set it UUID. If the maintainer want to read one of the machine, just need to set the specified machine Id. If the maintainer wants to read all machine's info, she/he needs to set the machineId param with "all" value.

requestUserId: the param is the maintainer user id.

function: the push websocket to collect message send by machine.

machineId: the param is machine Id of the sending message machine.

The image below demonstrate the machine send message and the maintainer read the message in soft real-time.