taskScheduler.js
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"use strict";
var configParser_1 = require("./configParser");
/**
* The taskScheduler keeps track of the spec files that needs to run next
* and which task is running what.
*/
var TaskQueue = (function () {
// A queue of specs for a particular capacity
function TaskQueue(capabilities, specLists) {
this.capabilities = capabilities;
this.specLists = specLists;
this.numRunningInstances = 0;
this.specsIndex = 0;
this.maxInstance = capabilities.maxInstances || 1;
}
return TaskQueue;
}());
exports.TaskQueue = TaskQueue;
var TaskScheduler = (function () {
/**
* A scheduler to keep track of specs that need running and their associated
* capabilities. It will suggest a task (combination of capabilities and spec)
* to run while observing the following config rules:
* multiCapabilities, shardTestFiles, and maxInstance.
* Precondition: multiCapabilities is a non-empty array
* (capabilities and getCapabilities will both be ignored)
*
* @constructor
* @param {Object} config parsed from the config file
*/
function TaskScheduler(config) {
this.config = config;
var excludes = configParser_1.ConfigParser.resolveFilePatterns(config.exclude, true, config.configDir);
var allSpecs = configParser_1.ConfigParser.resolveFilePatterns(configParser_1.ConfigParser.getSpecs(config), false, config.configDir)
.filter(function (path) {
return excludes.indexOf(path) < 0;
});
var taskQueues = [];
config.multiCapabilities.forEach(function (capabilities) {
var capabilitiesSpecs = allSpecs;
if (capabilities.specs) {
var capabilitiesSpecificSpecs = configParser_1.ConfigParser.resolveFilePatterns(capabilities.specs, false, config.configDir);
capabilitiesSpecs = capabilitiesSpecs.concat(capabilitiesSpecificSpecs);
}
if (capabilities.exclude) {
var capabilitiesSpecExcludes_1 = configParser_1.ConfigParser.resolveFilePatterns(capabilities.exclude, true, config.configDir);
capabilitiesSpecs = capabilitiesSpecs.filter(function (path) {
return capabilitiesSpecExcludes_1.indexOf(path) < 0;
});
}
var specLists = [];
// If we shard, we return an array of one element arrays, each containing
// the spec file. If we don't shard, we return an one element array
// containing an array of all the spec files
if (capabilities.shardTestFiles) {
capabilitiesSpecs.forEach(function (spec) {
specLists.push([spec]);
});
}
else {
specLists.push(capabilitiesSpecs);
}
capabilities.count = capabilities.count || 1;
for (var i = 0; i < capabilities.count; ++i) {
taskQueues.push(new TaskQueue(capabilities, specLists));
}
});
this.taskQueues = taskQueues;
this.rotationIndex = 0; // Helps suggestions to rotate amongst capabilities
}
/**
* Get the next task that is allowed to run without going over maxInstance.
*
* @return {{capabilities: Object, specs: Array.<string>, taskId: string,
* done: function()}}
*/
TaskScheduler.prototype.nextTask = function () {
var _loop_1 = function (i) {
var rotatedIndex = ((i + this_1.rotationIndex) % this_1.taskQueues.length);
var queue = this_1.taskQueues[rotatedIndex];
if (queue.numRunningInstances < queue.maxInstance &&
queue.specsIndex < queue.specLists.length) {
this_1.rotationIndex = rotatedIndex + 1;
++queue.numRunningInstances;
var taskId = '' + rotatedIndex + 1;
if (queue.specLists.length > 1) {
taskId += '-' + queue.specsIndex;
}
var specs = queue.specLists[queue.specsIndex];
++queue.specsIndex;
return { value: {
capabilities: queue.capabilities,
specs: specs,
taskId: taskId,
done: function () {
--queue.numRunningInstances;
}
} };
}
};
var this_1 = this;
for (var i = 0; i < this.taskQueues.length; ++i) {
var state_1 = _loop_1(i);
if (typeof state_1 === "object")
return state_1.value;
}
return null;
};
/**
* Get the number of tasks left to run or are currently running.
*
* @return {number}
*/
TaskScheduler.prototype.numTasksOutstanding = function () {
var count = 0;
this.taskQueues.forEach(function (queue) {
count += queue.numRunningInstances + (queue.specLists.length - queue.specsIndex);
});
return count;
};
/**
* Get maximum number of concurrent tasks required/permitted.
*
* @return {number}
*/
TaskScheduler.prototype.maxConcurrentTasks = function () {
if (this.config.maxSessions && this.config.maxSessions > 0) {
return this.config.maxSessions;
}
else {
var count_1 = 0;
this.taskQueues.forEach(function (queue) {
count_1 += Math.min(queue.maxInstance, queue.specLists.length);
});
return count_1;
}
};
/**
* Returns number of tasks currently running.
*
* @return {number}
*/
TaskScheduler.prototype.countActiveTasks = function () {
var count = 0;
this.taskQueues.forEach(function (queue) {
count += queue.numRunningInstances;
});
return count;
};
return TaskScheduler;
}());
exports.TaskScheduler = TaskScheduler;