Initializing help system before first use

# dmpinitwebservice

Purpose
Initialize a dmpresource to access a DMP webservice.
Synopsis
`procedure dmpinitwebservice(res:dmpresource, functionid:text)`
`procedure dmpinitwebservice(res:dmpresource, id:text, functionid:text, env:text)`
Arguments

res | The dmpresource value to initialize.
id | The ID of the solution service you want to access (or empty string)
functionid | The ID of the function you want to access, ie the function name (or an empty string)
env | The lifecycle stage of the service you want to access (or empty string), one of:
DMP_ENV_DESIGN | Design or Root
DMP_ENV_STAGING | Staging
DMP_ENV_PRODUCTION | Production

Example

    declarations
      res: dmpresource
    end-declarations
    dmpinitwebservice(res,"getBestPolicy")
    if res.status<>DMP_OK then
      writeln('ERROR: ',res.lasterror)
    end-if

Further information
1. This procedure will initialize a dmpresource to access a DMP function deployed as a SERVERLESS_REST type solution service. Typically this mean a DMP function deployed to AWS Lambda. It cannot be used with functions deployed as services in any other ways.
2. You can pass an empty string if you don't want to specify any of the arguments, but you must specify at least one of id and functionid.
3. The functionid value is usually the function name.
4. If you don't specify a lifecycle environment, the lifecycle of the component executing the model will be used.
5. When running in a solution with isolated lifecycles, you will only be able to access component instances from the same or lower lifecycle as the current component - e.g. a model run by a component in Staging can access resources in Staging and Design but not resources in Production.
6. You should check the status attribute of the dmpresource after calling this procedure.
Parent Topic Procedures and functions

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