plugin.ext('onPreResponse', function (request, next) {
var startDate = cache.get(request.id);
if (startDate) {
var statusCode = (request.response.isBoom) ? request.response.output.statusCode : request.response.statusCode;
var statName = settings.template
.replace('{path}', normalizePath(request._route.path))
.replace('{method}', request.method.toUpperCase())
.replace('{statusCode}', statusCode);
statName = (statName.indexOf('.') === 0) ? statName.substr(1) : statName;
statsdClient.increment(statName);
statsdClient.timing(statName, startDate);
cache.del(request.id);
}
next();
});
return function(req, res, next) {
var self = this;
var cache = cachestore.get(req.path);
res.original_send = res.send;
// returns the value immediately
if (cache) {
res.send(cache);
return;
}
if (!queues[req.path]) {
queues[req.path] = [];
}
// first request will get rendered output
if (queues[req.path].length === 0
&& queues[req.path].push(function noop(){})) {
res.send = function (string) {
var body = string instanceof Buffer ? string.toString() : string;
cachestore.put(req.url, body, ttl);
// drain the queue so anyone else waiting for
// this value will get their responses.
var subscriber = null;
while (subscriber = queues[req.path].shift()) {
if (subscriber) {
process.nextTick(subscriber);
}
}
res.original_send(body);
};
next();
// subsequent requests will batch while the first computes
} else {
queues[req.path].push(function() {
var body = cachestore.get(req.path);
res.send(body);
});
}
}
queues[req.path].push(function() {
var body = cachestore.get(req.path);
res.send(body);
});