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2.5 KiB
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2.5 KiB
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{"version":3,"sources":["retry/retry.js"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;AAAA,2C;AACA,E;AACA,W;AACA,yD;AACA,kE;AACA,kD;AACA,sD;AACA,mE;AACA,qE;;AAEA,4B;AACA,kB;AACA,qD;AACA,kC;AACA,kB;AACA,oE;AACA,8B;AACA,uC;AACA,mB;AACA,gB;AACA,uB;AACA,M;AACA,yB;AACA,E;;AAEA,2B;;AAEA,mC;AACA,sB;AACA,oB;AACA,wB;AACA,oC;AACA,2B;AACA,I;;AAEA,sE;AACA,oC;AACA,8B;AACA,oB;;AAEA,8B;AACA,6B;;AAEA,2B;AACA,sB;AACA,yD;AACA,kE;AACA,wB;AACA,0D;AACA,4C;AACA,mB;AACA,I;;AAEA,0E;AACA,oC;AACA,oB;AACA,uC;AACA,wB;AACA,oC;AACA,qD;AACA,mB;AACA,G;;AAEA,G","file":"/packages/retry.js","sourcesContent":["// Retry logic with an exponential backoff.\n//\n// options:\n// baseTimeout: time for initial reconnect attempt (ms).\n// exponent: exponential factor to increase timeout each attempt.\n// maxTimeout: maximum time between retries (ms).\n// minCount: how many times to reconnect \"instantly\".\n// minTimeout: time to wait for the first `minCount` retries (ms).\n// fuzz: factor to randomize retry times by (to avoid retry storms).\n\nRetry = function (options) {\n var self = this;\n _.extend(self, _.defaults(_.clone(options || {}), {\n baseTimeout: 1000, // 1 second\n exponent: 2.2,\n // The default is high-ish to ensure a server can recover from a\n // failure caused by load.\n maxTimeout: 5 * 60000, // 5 minutes\n minTimeout: 10,\n minCount: 2,\n fuzz: 0.5 // +- 25%\n }));\n self.retryTimer = null;\n};\n\n_.extend(Retry.prototype, {\n\n // Reset a pending retry, if any.\n clear: function () {\n var self = this;\n if (self.retryTimer)\n clearTimeout(self.retryTimer);\n self.retryTimer = null;\n },\n\n // Calculate how long to wait in milliseconds to retry, based on the\n // `count` of which retry this is.\n _timeout: function (count) {\n var self = this;\n\n if (count < self.minCount)\n return self.minTimeout;\n\n var timeout = Math.min(\n self.maxTimeout,\n self.baseTimeout * Math.pow(self.exponent, count));\n // fuzz the timeout randomly, to avoid reconnect storms when a\n // server goes down.\n timeout = timeout * ((Random.fraction() * self.fuzz) +\n (1 - self.fuzz/2));\n return timeout;\n },\n\n // Call `fn` after a delay, based on the `count` of which retry this is.\n retryLater: function (count, fn) {\n var self = this;\n var timeout = self._timeout(count);\n if (self.retryTimer)\n clearTimeout(self.retryTimer);\n self.retryTimer = Meteor.setTimeout(fn, timeout);\n return timeout;\n }\n\n});\n"]} |