• #29832
    Salesforce | Sanjana Sanjana #13
    Forcetalks

    What is the difference between a Top-Down and Bottom-Up approach in SOAP Web Services?

    What is the difference between a Top-Down and Bottom-Up approach in SOAP Web Services?

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    #29858
    Forcetalks

    Top Down approach in SOAP-

    1. Top Down approach involves creating a WSDL and then creating the Web service using the WSDL file.
    2. In top-down approach, first you design the implementation of the Web service by creating a WSDL file. You can then create the Web service skeleton Java classes from the wsdl, and add the required code.

    Bottom Up approach in SOAP-

    1. When creating a web service using Bottom Up approach, first you write the java classes for the web service and then create the WSDL file and publish the web service.
    2. Although bottom-up Web service development may be faster and easier, the top-down approach is the recommended way of creating a Web service.
    #34150
    Salesforce | Parul Parul #2
    Forcetalks

    In a top-down approach, we create the WSDL first and then generate the web service artifact using the tool available in JDK.

    Example scenarios:

    • Users will be responsible for developing their own clients using different frameworks, based on a published WSDL.
    • By creating the WSDL file first you will ultimately have more control over the web service, and can eliminate interoperability issues that may arise when creating a web service using the bottom-up method.

    When creating a Web service using a bottom-up approach, first you write the java classes for the web service and then create the WSDL file and publish the web service.

    Example scenarios:

    • Situations which need quick and faster completion may prefer Java approach
    • Java first approach is often the fastest and easiest approach.

     

    Thanks.

    #34200
    Salesforce | shariq shariq #1
    Forcetalks

    Hi,

    To make it more simple-

    Top-down means you start with a WSDL and then create all the necessary scaffolding  all the way down.

    Bottom-up means you start with a your method, and generate the WSDL from it.

    Hope this helps.

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