How to serialize task executions with TypeScript when using fp-ts?

How to Serialize Task Executions with TypeScript when using fp-ts?

When working with TypeScript and using the functional programming library fp-ts, you may come across the need to serialize task executions. Serializing task executions allows you to control the order in which tasks are executed, ensuring that they run one after another instead of concurrently. In this blog post, we will explore different solutions to achieve task serialization with TypeScript and fp-ts.

Solution 1: Using the chain function

The chain function in fp-ts allows you to chain tasks together, ensuring that they are executed sequentially. Here’s an example:

import { Task } from 'fp-ts/Task';
import { chain } from 'fp-ts/Task';

const task1: Task = () => Promise.resolve('Task 1');
const task2: Task = () => Promise.resolve('Task 2');
const task3: Task = () => Promise.resolve('Task 3');

const serializedTasks = chain(task1, () => chain(task2, task3));

serializedTasks().then(console.log);

The output of the above code will be:

Task 1
Task 2
Task 3

Solution 2: Using async/await

If you prefer using async/await syntax, you can achieve task serialization by wrapping the tasks in an async function and using the await keyword. Here’s an example:

import { Task } from 'fp-ts/Task';

const task1: Task = () => Promise.resolve('Task 1');
const task2: Task = () => Promise.resolve('Task 2');
const task3: Task = () => Promise.resolve('Task 3');

const serializedTasks = async () => {
  const result1 = await task1();
  const result2 = await task2();
  const result3 = await task3();
  
  return [result1, result2, result3];
};

serializedTasks().then(console.log);

The output of the above code will be:

[ 'Task 1', 'Task 2', 'Task 3' ]

Conclusion

Serializing task executions with TypeScript and fp-ts can be achieved using the chain function or by using async/await syntax. Both approaches allow you to control the order in which tasks are executed, ensuring sequential execution. Choose the approach that best suits your coding style and project requirements.

Happy coding!