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object-state
Advanced tools
Observe Object states, abstract into events, and react to with Workflows and Activities.
Creates observable states to an object. States are defined using JSON Schema 03 standard. Object properties are monitored for changes, changes trigger JSON Schema validation tests. When a state is enabled or disabled a notification event is emitted on the object.
Instance methods are available if the create() method was used to instantiate a new Object State.
var AbstractObject = require( 'object-state' ).create();
AbstractObject.defineStates({
active: {
properties: {
users: { type: 'number', minimum: 5; }
}
}
});
AbstractObject.uses = 3;
AbstractObject.is.active; // -> false
AbstractObject.uses = 6;
AbstractObject.is.active; // -> true
var StateMonitor = {};
require( 'object-state' ).defineStates( StateMonitor, {
pinged_and_dinged: {
description: "StateMonitor has been pinged and dinged.",
properties: {
ping: { value: true },
ding: { value: true }
}
}
});
StateMonitor.on( 'pinged_and_dinged', function() {
console.log( "We've been pinged and dinged!" );
});
StateMonitor.ping = true;
StateMonitor.ding = true;
console.log( StateMonitor.is.pinged_and_dinged ) // -> true
// Create Express Server
var app = require( 'express' )();
var server = app.listen( 0 );
// Define states
require( 'object-state' ).defineStates( server, {
active: {
'description': 'The Express server has connections.',
'properties': {
'_connections': { type: 'number', minimum: 1 }
}
},
overloaded: {
'description': 'The Express server has too many connections.',
'properties': {
'_connections': { type: 'number', minimum: 3 }
}
}
});
// Do somethign when sever has too many connections
server.on( 'overloaded', function( server, state ) {
console.log( "Express server is overloaded, there are over %s connections.", state.properties._connections.minimum );
});
(The MIT License)
Copyright (c) 2013 Usability Dynamics, Inc. <info@usabilitydynamics.com>
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
FAQs
Observe Object states, abstract into events, and react to with Workflows and Activities.
The npm package object-state receives a total of 1 weekly downloads. As such, object-state popularity was classified as not popular.
We found that object-state demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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