Hi Everybody, Greetings from Colombia. This is my first Blog.
This is a step by step example of how to setup a Sender RESTAdapter Channel (with the Operation PUT), and how to test it using the Chrome Plugin and a simple JAVA Class. I won't explain how to build the Mapping and the other side of the integration.
System: SAP PI 7.4 SP11
This example will follow this workflow:
JAVA <-> PI RESTAdapter (JSON) <-> PI Mapping (XML) <-> PI JDBCAdapter (XML) <-> Oracle SP
Bussiness Case Description
A Java class consumes a REST service published in PI to check if an ID (nmDni) represents a risk to the company.
SETTINGS
Message Mapping
The datatype must have a field nmDni, named just like the parameter that we are going to send in the JSON payload.
Communication Channel
We will be working with the Adapter Type REST in the communication channel. Follow the next screenshots to set up the channel:
General Tab
Here it's important to set the Element Name with the request Message Type, so the JSON structure can be recognized in the request
Channel Selection Tab
REST Resources Tab
Here it's very important to set the JSON Element that will match with the datatype defined in PI nmDni
Rest Operation Tab
The last 2 tabs are left empty
- Operation Determination
- Error Handling
Activate and assign the channel to the ICO in the Integration Builder.
TESTING
Ping
The ping on the channel, in the Communication Channel Monitor, you can get the endpoint and check the pattern of the parameter that we will use in the testing fase.
Chrome Plugin
Download and install the Advance REST Client plugin for Google Chrome.
Put the endpoint and select the PUT operation. In the payload section paste this code:
{
"nmDni":"6183"
}
Clic the "Send" button and the response should appear in JSON format 
Java Class
Here it's the Java class that will work to test the REST Service. It's important to notice, that you need a PI user and password. That user and password is encoded using Base64 library.
package com.prueba.rest;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import sun.misc.BASE64Encoder;
public class PruebaRestMAIN {
public static void main(String[] args) {
String name = "pi_username";
String password = "pi_password";
String authString = name + ":" + password;
String authStringEnc = new BASE64Encoder().encode(authString.getBytes());
System.out.println("Auth string: " + authStringEnc);
String line;
StringBuffer jsonString = new StringBuffer();
try {
URL url = new URL("http://your_PI_domain:50000/RESTAdapter/riesgosput/1234");
//escape the double quotes in json string
String payload="{\"nmDni\":\"71333\"}";
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setRequestMethod("PUT");
connection.setRequestProperty("Authorization", "Basic "+authStringEnc);
connection.setRequestProperty("Accept", "application/json");
connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream(), "UTF-8");
writer.write(payload);
writer.close();
BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
while ((line = br.readLine()) != null) {
jsonString.append(line);
}
br.close();
connection.disconnect();
} catch (Exception e) {
throw new RuntimeException(e.getMessage());
}
System.out.println("Respuesta: "+jsonString.toString());
}
}
PI MESSAGE MONITOR
In the PI message monitor you will see the 2 lines for each test. And if you open the message you will see in the Payload tab the JSON message:
I hope this helps in your way to test the RESTAdapter in PI.
Have a good day