npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

kermit-service-observer

v0.1.1

Published

Inter service event listener for kermit.

Downloads

9

Readme

Kermit Module

kermit-service-observer - 0.1.1

Inter service event listener for kermit.

Install

$ npm install --save kermit-service-observer

Include

Register the observer service in your application services config (eg. config/application.config.js).

module.exports = {
  ...
  app: {
    services: {
      observer: 'kermit-service-observer/ObserverService'
      ...
    }
  }
  ...
}

Use

A common use case is to execute an panic method in case of any application service triggers an error, for example in case of a lost db connection etc.

To archive this register the listener in your application's pre launch phase:

  // src/Application.js
  ...
  
  launch() {
    super.launch();
    
    let observer = this.getServiceManager().get('observer');
    
    // execute the callback in case of any service (referenced by its service-key)
    // triggers an "error" event.
    observer.awaitAny([
      'mongo-service', 'redis-service', 'rabbit-service'
    ], 'error', (err, observation) => {
        if (err) {
          // an error within the service observation occured.
          throw err;
        }
        
        // this is where your recovery code goes.
        
        console.error(
          'the service', observation.service,
          `triggered an ${observation.event} event, passing the following arguments:`,
          observation.args
        );
    });
    
    return this;
  }
  ...
  

The service observer is also handy to use for assure the readyness of your asynchronous application services:

  // src/Application.js
  ...
  
  launch() {
    super.launch();
    
    let observer = this.getServiceManager().get('observer');
    
    // execute the callback in case of all services (referenced by its service-keys)
    // have triggered an "ready" event.
    observer.awaitAll([
      'mongo-service', 'redis-service', 'rabbit-service'
    ], 'ready', (err, observations) => {
      if (err) {
        // an error within the service observation occured.
        throw err;
      }
      
      // this is where your on-all-services-ready-to-use code goes.
      console.info('All services are ready!');
    });
    
    return this;
  }
  ...

LICENSE

The files in this archive are released under BSD-2-Clause license. You can find a copy of this license in LICENSE.