Ember-cli-logger

Ember addon that will report boot time, transition times and errors to your api. You will have to create this api yourself as this addon provides only client part and example schema. For more info look into logger.js and reporter.js services inside addon folder.

Installation

ember install ember-cli-logger

Configuration

Configuration is done through environment.js file.

ENV.logger: {
  isReportingEnabled: false,
  isErrorHookEnabled: false,
  isConsoleEnabled: false,
  endpoint: null,
  server: 'development',
},

isReportingEnabled

When enabled addon will report events to your api.

isErrorHookEnabled

When enabled addon will overwrite default event hook.

isConsoleEnabled

When enabled addon will log all events to console too.

endpoint

Place to send events (for example: https://example/reporter).

server

Your identification to know where the event come from.

Build configuration

This addon also modifies build pipeline to inject timer into index.html and polyfill. You can toggle these with flags in ember-cli-build.js.

new EmberApp(defaults, {
  measureBootTime: false,
  isPerformancePolyfillEnabled: true,
});

measureBootTime

If disabled index.html file wont be affected in any way note that performance polyfill wont be also included.

isPerformancePolyfillEnabled

If enabled polyfill for performance.now is included.

Events

Every event contains tick and instance property.

• tick - used to number events one by one.
• instance - each application gets random instance number so you can track application flow.

Boot /boot POST

After boot is completed event is created and reported(if enabled).

Payload

• start - time of performance.now() executed from index.html
• ready - time of performance.now() executed application ready hook
• finish - time of performance.now() executed from first didTransition hook
• browser - navigator.userAgent
• server - value specified from config

Transition /transition POST

Each transition is logged and measured.

Payload

• time - delta time between willTransition and didTransition hooks
• name - name of the route
• params - parameters for route

Error /error POST

When isErrorHookEnabled errors are reported as well.

Payload

• message - message of the error
• stack - stack trace (although not very useful)

Logging of custom events

You can log custom events via logger service: Logger.log(severity, message, time)

import Ember from 'ember';
const {computed, inject: {service}, K} = Ember;

Ember.Controller.extend({
  logger: service(),

  filteredModel: computed('model', {
    get() {
      const start = performance.now();
      const filteredModel = model.filter(K);
      this.get('logger').log('info', 'Delta time to filter model', performance.now() - start);
      return filteredModel;
    }
  });
});

Example of sql database

Sql tables may look like this.

CREATE TABLE `boot` (
  `instance` int(11) NOT NULL,
  `tick` int(11) NOT NULL,
  `server` varchar(255) NOT NULL,
  `start` float NOT NULL,
  `ready` float NOT NULL,
  `finish` float NOT NULL,
  `browser` varchar(255) NOT NULL,
  `timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `error` (
  `instance` int(11) NOT NULL,
  `tick` int(11) NOT NULL,
  `message` text NOT NULL,
  `stack` text NOT NULL,
  `timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `transition` (
  `instance` int(11) NOT NULL,
  `tick` int(11) NOT NULL,
  `name` varchar(255) NOT NULL,
  `time` float NOT NULL,
  `timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `params` varchar(255) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `log` (
  `instance` int(11) NOT NULL,
  `tick` int(11) NOT NULL,
  `message` text NOT NULL,
  `severity` varchar(255) NOT NULL,
  `time` float NOT NULL,
  `timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

ALTER TABLE `boot` ADD PRIMARY KEY (`instance`);
ALTER TABLE `error` ADD PRIMARY KEY (`tick`,`instance`);
ALTER TABLE `transition` ADD PRIMARY KEY (`tick`,`instance`);
ALTER TABLE `log` ADD PRIMARY KEY (`tick`,`instance`);