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  4. Configure Responses for Your GraphQL Implementation

Configure Responses for Your GraphQL Implementation

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Configure your GraphQL implementation to return a specific response for each flow.

Before You Begin

Complete these procedures:

Add Logic to Your Flows

  1. Launch Anypoint Code Builder.

  2. Open the Books Implementation project.

  3. Open the flows.xml file.

  4. In your Query.bookById flow, add a new line after the <graphql-router:data-fetcher/> element.

  5. Start typing set and select Set-Payload from the list of possible components. The Query.bookById flow now resembles the following:

    <flow name="Query.bookById">
  <graphql-router:data-fetcher xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="bookById"/>
  <set-payload value="#[]" doc:name="Set payload" doc:id="mtehoh" />
  <graphql-router:serialize xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="bookById"/>
</flow>

  6. Replace the <set-payload> component with the following JSON response:

    <set-payload value='{"id": 1, "name": "My Book", "pageCount": 28, "author": "author-1"}' mimeType="application/json" />

  7. Click Run and Debug in the Activity Bar, then click Start Debugging (F5).

  8. Using curl, create a POST request to the local address and send a bookById query.

    See Test Your GraphQL Implementation for examples.

  9. Send the curl request.

    Anypoint Code Builder returns your configured JSON response:

    {
    "data": {
        "bookById": {
            "id": "1",
            "name": "My Book",
            "pageCount": 28,
            "author": null
        }
    }
}

After testing the bookById endpoint, add custom responses to test the remaining flows:

<flow name="api-main-flow">
  <http:listener xmlns:http="http://www.mulesoft.org/schema/mule/http" config-ref="http-listener-config" path="${http.listener.path}"/>
  <graphql-router:route xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config"/>
</flow>
<flow name="Query.bookById">
  <graphql-router:data-fetcher xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="bookById"/>
  <set-payload value='{"id": 1, "name": "My Book", "pageCount": 28, "author": "author-1"}' mimeType="application/json" />
  <graphql-router:serialize xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="bookById"/>
</flow>
<flow name="Query.books">
  <graphql-router:data-fetcher xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="books"/>
  <set-payload value='[{"id": 1, "name": "My Book", "pageCount": 28, "author": "author-1"},{"id": 2, "name": "His Book", "pageCount": 12, "author": "author-2"},{"id": 3, "name": "Her Book", "pageCount": 41, "author": "author-1"}]' mimeType="application/json"/>
  <graphql-router:serialize xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="books"/>
</flow>
<flow name="Query.bestsellers">
  <graphql-router:data-fetcher xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="bestsellers"/>
  <set-payload value='{"books": ["1,2"], "authors":["author-1", "author-2"]}' mimeType="application/json" />
  <graphql-router:serialize xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="bestsellers"/>
</flow>
<flow name="Book.author">
  <graphql-router:data-fetcher xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Book" fieldName="author"/>
  <set-payload value='{"id": "author-1", "firstName": "John", "lastName": "Doe"}' mimeType="application/json" />
  <graphql-router:serialize xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Book" fieldName="author"/>
</flow>
<flow name="Bestsellers.books">
  <graphql-router:data-fetcher xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Bestsellers" fieldName="books"/>
  <set-payload value='[{"id": 1, "name": "My Book", "pageCount": 28, "author": "author-1"},{"id": 2, "name": "His Book", "pageCount": 12, "author": "author-2"},{"id": 2, "name": "Her Book", "pageCount": 41, "author": "author-1"}]' mimeType="application/json"/>
  <graphql-router:serialize xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Bestsellers" fieldName="books"/>
</flow>
<flow name="Bestsellers.authors">
  <graphql-router:data-fetcher xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Bestsellers" fieldName="authors"/>
  <set-payload value='[{"id": "author-1", "firstName": "John", "lastName": "Doe"},{"id": "author-2", "firstName": "Anie", "lastName": "Eberts"}]' mimeType="application/json" />
  <graphql-router:serialize xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Bestsellers" fieldName="authors"/>
</flow>