This example demonstrates simple request/reply communication when using a pair of HTTP Inbound/Outbound Gateways.

The sample consists of two parts:

• Client - Basic command-line application
• Server - Web application (War-file)

The easiest way to run the server is to use the Maven Jetty Plugin. Simply execute:

$ mvn jetty:run

This command starts a Jetty servlet container running on port 8080 serving the application. Alternatively you can also package the war-file and deploy it manually to a servlet container of your choosing. For that to happen execute:

$ mvn clean package

The resulting war-file will be located in the target folder.

If you are using STS and the project is imported as an Eclipse project into your workspace, you can just execute Run on Server. This will start the server application.

In order to run the client using Maven, execute:

$ mvn clean package exec:java

This will package the application and run it using the Exec Maven Plugin

In STS (Eclipse), go to package org.springframework.integration.samples.http, right-click HttpClientDemo and select Run as --> Java Application. This will run the client application.

The gateway (client) initiates a simple request posting "Hello" to the server and the server responds by appending from the other side to the message payload and returns. You should see the following output from the server:

INFO : org.springframework.integration.samples.http.HttpClientDemo - Replied with: Hello from the other side