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module-manager.js
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module-manager.js
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var fs = require("fs");
var Set = require("Set");
var path = require("path");
var Module = require("./module.js");
function intersection_of_arrays(array1, array2){
//console.log("comparing arrays, ", array1, array2)
array3 = array1.filter(function(n) {
return array2.indexOf(n) != -1;
});
return array3;
}
var ModuleManager = new function(){
var modules_by_id = {};
function get_module_count(){
var c = 0;
for(var i in modules_by_id){
c++;
}
return c;
}
this.add_module = function(module_dir){
var current_module = new Module(module_dir);
modules_by_id[current_module.info.name] = current_module;
current_module.registered = true;
}
this.add_modules = function(modules_dir){
var modules_dir_contents = fs.readdirSync(modules_dir);
for(var i in modules_dir_contents){
var current_module_path = path.resolve(modules_dir, modules_dir_contents[i]);
this.add_module(current_module_path);
}
}
function count_registred_modules(){
var c = 0;
for(var i in modules_by_id){
c++;
}
return c;
}
function decide_module_execution_order(){
var initialization_list = [];
var accepted_ids = new Set();
var defined_so_far_chip_ids = new Set();
var total_module_count = count_registred_modules();
do{
var initialized_in_this_iteration = 0;
for(var module_id in modules_by_id){
if(accepted_ids.has(module_id)){
continue;
}
var initialize_module = true;
var current_module = modules_by_id[module_id];
var required_chips = [];
required_chips = current_module.get_required_chip_ids();
var chips_defined_by_current_module = current_module.get_defined_chip_ids();
var chips_defined_by_current_module_set = new Set();
chips_defined_by_current_module_set.addAll(chips_defined_by_current_module);
required_chips.forEach(function(chip_id){
if(!defined_so_far_chip_ids.has(chip_id) && !chips_defined_by_current_module_set.has(chip_id)){
initialize_module = false;
console.log("cannot initialize ", module_id, "because of ", chip_id);
}
})
if(initialize_module){
console.log("initializing module", module_id);
initialization_list.push(module_id);
accepted_ids.add(module_id);
initialized_in_this_iteration++;
defined_so_far_chip_ids.addAll(chips_defined_by_current_module);
}
}
}while(initialized_in_this_iteration!=0 && total_module_count!=initialization_list.length);
if(total_module_count!=initialization_list.length){
throw new Error("Cannot initialize some modules because of circular dependency");
}
return initialization_list;
}
this.initialize_all = function(dispatcher){
var module_ids = decide_module_execution_order();
for(var i in module_ids){
var module_id = module_ids[i];
modules_by_id[module_id].initialize(dispatcher);
}
}
this.start = function(chip_types_to_start){
for(var module_id in modules_by_id){
var module = modules_by_id[module_id];
module.start(chip_types_to_start);
}
}
}
module.exports = ModuleManager;

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module-manager.js (2 KB)

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