Nevertheless! Party Metaphorically

    heroku-addonpool

    1.0.2 • Public • Published

    Manages Addon Pool of an App in Heroku.

    # NOTE:
    # The app with addons (pool app) must be different from the app
    # that uses the addons because heroku resets the pool app each
    # time a configuration variable is changed.


    # set heroku cli login in environment variables
    HEROKU_CLI_LOGIN=youremail@domain.com
    HEROKU_CLI_PASSWORD=yourpassword
    
    # also as of now you also need to purge cache before build
    heroku repo:purge_cache -a yourpoolapp

    var Pool = require('heroku-addonpool');
    // Pool(<id>, <app>, <opt>)
    
    /* Assume "ci-herokuaddonpool" has 2 postgresql addons provisioned.
     * There are 3 consumers which need access to a postgresql database,
     * for a limited amount of time. Since we have only 2 available, we
     * create a pool to enable consumers to acquire (remove) and release
     * (add) database from the pool. If no database is available in the
     * pool, a consumer will have to wait (Promise) until the resource
     * is released by some other consumer.
     */
    
    var pg = Pool('heroku-postgresql', 'ci-herokuaddonpool', {
      'config': /(HEROKU_POSTGRESQL|DATABASE)\S*URL/g,
      'log': true
    });
    
    pg.setup().then((ans) => {
      var cona = 'consumer-a';
      var conb = 'consumer-b';
      var conc = 'consumer-c';
      console.log(ans);      // available addons (Map)
      console.log(ans.size); // number of addons
      pg.remove(cona).then((ans) => {
        console.log(ans.name);        // name of the addon
        console.log(ans.attachments); // app to addon attachments
        console.log(ans.installedAt); // provision date
        console.log(ans.owningApp);   // owner app of this addon
        console.log(ans.plan);        // addon service:plan
        console.log(ans.price);       // addon price
        console.log(ans.state);       // addon state
        console.log(ans.value);       // addon access url
        console.log(`${cona} has acquired ${ans.name}`);
        console.log(`-> connection string: ${ans.value}`);
        // consumer-a uses database for 20s
        setTimeout(() => {
          console.log(`${cona} is releasing ${ans.name}`);
          pg.add(cona);
        }, 20000);
      }).then(() => {
        return pg.remove(conb);
      }).then((ans) => {
        console.log(`${conb} has acquired ${ans.name}`);
        console.log(`-> connection string: ${ans.value}`);
        // consumer-b uses database for 10s
        setTimeout(() => {
          console.log(`${conb} is releasing ${ans.name}`);
          pg.add(conb);
        }, 10000);
      }).then(() => {
        return pg.remove(conc);
      }).then((ans) => {
        // consumer-c waits for 10s until consumer-b releases
        console.log(`${conc} has acquired ${ans.name}`);
        console.log(`-> connection string: ${ans.value}`);
        // consumer-c uses database for 10s
        setTimeout(() => {
          console.log(`${conc} is releasing ${ans.name}`);
          pg.add(conc);
        }, 10000);
      });
    });

    Install

    npm i heroku-addonpool

    DownloadsWeekly Downloads

    5

    Version

    1.0.2

    License

    MIT

    Unpacked Size

    8.34 kB

    Total Files

    4

    Last publish

    Collaborators

    • wolfram77