Non-blocking dependent promise implementation sample

nonBlockingDependentPromise.js

// Application logic that get employee records alongside their individual next of kin data in a non blocking format
const getAllEmployeeInformation = async () => {
  // Start recording the execution time of the following code.
  console.time('better await')
  const allEmployees = await getAllEmployees(); // Get all employee from the DB

  // Map individual employee record with their next of kin data and return the mapped data
  const employeeNextOfKinPromise = allEmployees.map(employee => {
    return getEmployeeNextOfKin(employee.id).then(nextOfKin => {
      return { ...employee, nextOfKin };
    });
  })

  // Execute all the accumulated promises in parallel so that they don't block eack other and improve the response time
  const allEmployeeRecords = await Promise.all(employeeNextOfKinPromise);
  console.log(allEmployeeRecords);

  // Stop recording the execution time and log the elapsed time to the console.
  console.timeEnd('better await')
  return allEmployeeRecords;
}

getAllEmployeeInformation();