executor-service/test/index.js

An "ExecutorService" implementation closely modeled after its java counterpart. Provides child-process executors to mimic multithreaded executors. Implements "createExecutor(module_path_or_local_fn, [module_or_fn_constructor_args]), and "createExecutorPoo

var ExecutorService = require("../lib/ExecutorService");
var format = require('util').format;
/*var log = console.log.bind(console, 'LOG:')
var logErr = function(e) {
  console.error('ERROR', e.stack || e)
};*/
var async = require('async');
var assert = require('assert');
var uuid = require('node-uuid');
var path = require('path');
var executor_module_path = path.join(__dirname,'./runner.js');
var executorLocalFn = function(){
  return {
    ping : function (ct, cb) { cb(null, "pong " + ct ); }
  }
};
var executorLocalFnWithUncaughtException = function(){
  setTimeout(function(){throw new Error("EXPECTED THREAD EXCEPTION")},25);
  return {
    ping : function (ct, cb) { cb(null, "pong " + ct ); }
  }
};
var executorLocalFnWithArg = function(arg){
  return {
    ping : function (cb) { cb(null, arg); }
  }
};

var executorLocal = ExecutorService.createExecutor(executorLocalFn);


describe('executorLocal', function() {
  it('should reply with pong ten times', function (done){
    var executorLocal = ExecutorService.createExecutor(executorLocalFn);
    async.times(10, function(n, cb){
      executorLocal.invoke('ping', n, cb)
    }, done);    
  });
  it('should reply with pong ten times even though the thread respawns due to error', function (done){
    var executorLocalWithUncaughtException = ExecutorService.createExecutor(executorLocalFnWithUncaughtException);
    async.times(10, function(n, cb){
      // allow time for the exception to fire a few times
      setTimeout(function(){
        executorLocalWithUncaughtException.invoke('ping', n, cb);
      },50);
    }, done);    
  });
  describe('executorLocalWithConstructorArgs', function() {
    it('should reply with passed in constructor arg', function (done){
      var arg = uuid();
      var executorLocalWithArgs = ExecutorService.createExecutor(executorLocalFnWithArg, arg);
      executorLocalWithArgs.invoke('ping', function(err, result){
        assert(result==arg);
        done();
      })
    });
  });
  
});

describe('executorModule', function() {
  it('should reply with pong ten times', function (done){
    var executorModule = ExecutorService.createExecutor(executor_module_path);
    async.times(10, function(n, cb){
      executorModule.invoke('ping', n, cb)
    }, done);    
  });
});

describe('executorModulePool', function() {
  it('should reply with pong ten times', function (done){
    var executorModulePool = ExecutorService.createExecutorPool(5, executor_module_path);
    async.times(10, function(n, cb){
      executorModulePool.invoke('ping', n, cb)
    }, done);    
  });
});