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Adding timeout example to code in README #1

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20 changes: 14 additions & 6 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -20,26 +20,34 @@ var circuitBreaker = require('circuitbreaker');
var loadDataFromRemoteServer = function (id, callback) {
if (id < 0) {
return callback(new Error('error loading data ' + id));
} if (id === 100) {
// simulate slow request
return setTimeout(function () {
callback(null, 'data for id ' + id);
}, 100);
} else {
return callback(null, 'data for id ' + id);
}
};

var breaker = circuitBreaker(loadDataFromRemoteServer, {timeout: 10, maxFailures: 3, resetTimeout: 30});

breaker(23).then(console.log);
breaker(1).then(console.log);

breaker(-1).fail(console.log);
breaker(-1).fail(console.log);
breaker(-1).fail(console.log);
breaker(-2).fail(console.log);
breaker(-3).fail(console.log);

breaker(32).fail(function(err) {
breaker(2).fail(function(err) {
console.log('failed because breaker is open', err);
});

setTimeout(function () {
breaker(32).then(function (data) {
console.log('loaded data because circuit reset after timeout: ', data);
breaker(3).then(function (data) {
console.log('loaded data because circuit reset after timeout:', data);
});
breaker(100).fail(function (err) {
console.log('failed because function took to long:', err);
});
}, 35);
```
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