Application requesting and Getting info from second application

Question

Hi I'm busy with a project in C# that can provide the user with info.
The idea is that there is 2 application. 1. The user UI that has no connection to the DB.(WPF) 2. Has no User interface but has a connection to the DB and to a local cache.(C#)

So Application 1 communicates to application 2 only.
application 2 communicates with local cache and DB on the command of application 1

Any idea on how to set up the communication between both application?

Answer 1

Application 1 is called client, and App2 can be called a service. There are many implementations, eg

1. App2 is a publisher
2. App1 is a subscriber

You can use some queues (eg RabbitMQ ) as the bridge/broker. App2 writes some messages to a queue, and app1 subscribes to the message queue, whenever a message is published by App2, app1 will be notified and custom message handling can be fired.

Some tutorials to get started quickly:

• Using RabbitMQ in C# (I) Installation of RabbitMQ
• Using RabbitMQ in C# (II) Sending message to RabbitMQ
• Using RabbitMQ in C# (III) Consuming messages from RabbitMQ