This documentation is for WSO2 Data Services Server 3.2.2. View documentation for the latest release.
JSON Mapping Sample - Data Services Server 3.2.2 - WSO2 Documentation
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About the sample

A popular data format used with RESTful services is JSON. This sample contains a data service with JSON output mapping templates. Go to JSON Mapping for details on how to use JSON templates for output mapping in data service.

The service contains the following resources:

  • Resource: "offices"
  • Method: POST 
  • Description: Lists all the offices in the database. When office information is printed, all the employees that belong to an office are also printed using a nested query, which refers to the employeesInOfficeSQL query.

  • Resource: "boston_customers"
  • Method: GET
  • Description: Returns all the customers in Boston. 

  • Resource: "employee/{employeeNumber}"
  • Method: GET
  • Description: Returns employee information for the given employee number.

  • Resource: "employee"
  • Method: POST
  • Description: Insert a new employee to the database with the given information. 

  • Resource: "employee" with batch request 
  • Method: POST
  • Description: Insert a set of new employees to the database with the given information.

  • Resource: "employee"
  • Method: PUT
  • Description: Updates an existing user with new information. 

  • Resource: "employee
  • Method: GET
  • Description: Retrieve an existing employee. 

Building the sample

The sample data service named JSONSample should be deployed using the instructions in Samples Setup.

Running the sample

The sample service can be run using any client that can do REST calls. For example, use tools such as cURL or Advanced REST Client Chrome browser extension. The HTTP header "Accept" should be set to "application/json" and also, if a JSON payload is sent to the server, the HTTP header "Content-Type" should be set to "application/json".

The HTTP requests sent for each of the resources using cURL would be as follows:

  • "offices" (method=GET)

    curl -X GET -H "Accept: application/json" http://localhost:9763/services/samples/JSONSample/offices
  • "boston_customers" (method=GET)

    curl -X GET -H "Accept: application/json" http://localhost:9763/services/samples/JSONSample/boston_customers
  • "employee/{employeeNumber}" (method=GET)

    curl -X GET -H "Accept: application/json" http://localhost:9763/services/samples/JSONSample/employee/1002
  • "employee" (method=POST) :  A sample payload saved as the employee-payload.json file, that can be used when sending the data is given below.

    {
      "_postemployee": {
        "employeeNumber" : "14001",
        "lastName": "Smith",
        "firstName": "Will",
        "email": "will@google.com",
        "salary": "15500.0"
      }
    }

    The HTTP request sent using CURL would be as follows:

    curl -X POST -H 'Accept: application/json'  -H 'Content-Type: application/json' --data "@employee-payload.json" http://localhost:9763/services/samples/JSONSample/employee/
  • "employee" (method=POST) with batch request : A sample payload saved as the employee-payload.json file, that can be used when sending the data is given below.

    {
        "_postemployee_batch_req": {
            "_postemployee": [
                {
                    "employeeNumber": "5012",
                    "lastName": "Smith",
                    "firstName": "Will",
                    "email": "will@smith.com",
                    "salary": "13500.0"
                },
                {
                    "employeeNumber": "5013",
                    "lastName": "Peter",
                    "firstName": "Parker",
                    "email": "peter@parker.com",
                    "salary": "15500.0"
                }
            ]
        }
    }

    The HTTP request sent using CURL would be as follows:

    curl -X POST -H 'Accept: application/json'  -H 'Content-Type: application/json' --data "@employee-payload.json" http://localhost:9763/services/samples/JSONSample/employee_batch_req
  • "employee" (method=PUT) -  A sample payload saved as the employee-payload-update.json file, that can be used when sending the data is given below.

    {
      "_putemployee": {
        "employeeNumber" : "14001",
        "lastName": "Smith",
        "firstName": "Will",
        "email": "will@smith.com",
        "salary": "78500.0"
      }
    }


    The HTTP request sent using CURL would be as follows:

    curl -X PUT -H 'Accept: application/json'  -H 'Content-Type: application/json' --data "@employee-payload-update.json" http://localhost:9763/services/samples/JSONSample/employee/
  • "employee" (method=GET)

    curl -X GET -H 'Accept: application/json'  http://localhost:9763/services/samples/JSONSample/employee/14001
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