Grails Async Sample

controller.groovy

package foo

import grails.async.Promise
// more imports
import static grails.async.Promises.waitAll
import static grails.async.Promises.task


class ProductService {
  
  ProductDTO getProduct(String id){
    Promise<List<Warranty>> promiseWarranties = task { doWarrantyCall(id) }
    Promise<List<Link>> promiseCopyLinks = task { doLinksCall(id) }
    Promise<List<Specification>> promiseSpecifications = task { doSpecificationsCall(id) }
    Promise<List<Inventory>> promiseInventory = task { doInventoryCall(id) }
    Promise<List<Promotion> promisePromotions = task { doPromitionCall(id) }
    
    waitAll([promiseWarranties, promiseCopyLinks, promiseSpecifications, promiseInventory, promisePromotions])
    
    //do more work here

    return new ProductDTO(data: data)
  }
}