// This API has `CfnGraphQLSchema` by `definition` prop
const firstApi = new appsync.GraphqlApi(stack, 'FirstSourceAPI', {
  name: 'FirstSourceAPI',
  definition: appsync.Definition.fromFile(path.join(__dirname, 'appsync.merged-api-1.graphql')),
});

// This merged API generates `CfnSourceApiAssociation`
new appsync.GraphqlApi(stack, 'MergedAPI', {
  name: 'MergedAPI',
  definition: appsync.Definition.fromSourceApis({
    sourceApis: [
      {
        sourceApi: firstApi,
        mergeType: appsync.MergeType.MANUAL_MERGE,
      },
    ],
  }),
});

// This API has `CfnGraphQLSchema` by `definition` prop
const firstApi = new appsync.GraphqlApi(stack, 'FirstSourceAPI', {
  name: 'FirstSourceAPI',
  definition: appsync.Definition.fromFile(path.join(__dirname, 'appsync.merged-api-1.graphql')),
});

// This merged API does not generate `CfnSourceApiAssociation`
const mergedApi = new appsync.GraphqlApi(stack, 'MergedAPI', {
  name: 'MergedAPI',
  definition: appsync.Definition.fromSourceApis({
    sourceApis: [],
    mergedApiExecutionRole: mergedApiExecutionRole,
  }),
});

// This construct has `CfnSourceApiAssociation`
new appsync.SourceApiAssociation(stack, 'SourceApiAssociation1', {
  sourceApi: firstApi,
  mergedApi: mergedApi,
  mergeType: appsync.MergeType.MANUAL_MERGE,
  mergedApiExecutionRole: mergedApiExecutionRole,
});