@coya/task-manager

Task Manager

Scheduler for run tasks successively or simultaneously.

Installation

npm install @coya/task-manager

Usage examples

const { TaskManager, Task } = require('@coya/task-manager');

const firstTask = new Task('firstTask', 10, function() { // processed every 10 seconds
    console.log('hello');
    return Promise.resolve();
});

const secondTask = new Task('secondTask', 5, function() { // processed every 5 seconds
    console.log('hola');
    return Promise.resolve();
});

const taskManager = new TaskManager();
taskManager.processAsynchronousTasks([firstTask, secondTask])
.then(function() {
    taskManager.getLogs().info('Task manager stopped.');
}, function(error) {
    taskManager.getLogs().error(error);
    process.exit(1); // cancel all other scheduled tasks
});

Methods

processSynchronousTasks(taskList)

Process tasks list successively, it means that tasks are executed one by one. The following task is executed once the previous one is done.

Parameter	Type	Description	Default value
taskList	array	list of objects implementing or inheriting the Task class	none

processAsynchronousTasks(taskList)

Process tasks list simultaneously, it means that tasks are executed in the same time (using setTimeout()). It is different from setInterval() because the timer is launched after the task has been processed.

Parameter	Type	Description	Default value
taskList	array	list of objects implementing or inheriting the Task class	none

Task spec

The Task class, and so its constructor, contains three fields :

• name => name of the task
• timeInterval => interval in seconds between each task execution
• runFunction => task function called by the scheduler, it must return a promise (this function can be passed to the Task constructor or be a member method of the inheriting class)