From 18ed93c14fcafdfeb3f659242a43672b373cb370 Mon Sep 17 00:00:00 2001
From: Lucas Fernandes de Oliveira <lfo14@inf.ufpr.br>
Date: Mon, 29 May 2017 10:52:53 -0300
Subject: [PATCH] Issue #14: Convert Engine class to Singletion pattern
Signed-off-by: Lucas Fernandes de Oliveira <lfo14@inf.ufpr.br>
---
src/core/engine.spec.ts | 2 +-
src/core/engine.ts | 12 +++++++++++-
2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/src/core/engine.spec.ts b/src/core/engine.spec.ts
index 13f64fcb..b6430883 100644
--- a/src/core/engine.spec.ts
+++ b/src/core/engine.spec.ts
@@ -27,7 +27,7 @@ import { View } from "./view";
import { engineScenario } from "../../test/scenario";
describe("engine class", () => {
- const engine = new Engine();
+ const engine = Engine.getInstance();
const met = engineScenario.metrics;
const dim = engineScenario.dimensions;
diff --git a/src/core/engine.ts b/src/core/engine.ts
index af1640a8..b060a2f7 100644
--- a/src/core/engine.ts
+++ b/src/core/engine.ts
@@ -25,11 +25,21 @@ import { Query } from "../common/query";
import { RelationType } from "../common/types";
export class Engine {
+ private static instance: Engine;
+
private views: View[] = [];
private metrics: Metric[] = [];
private dimensions: Dimension[] = [];
- constructor () { }
+ private constructor () { }
+
+ public static getInstance(): Engine {
+ if (this.instance == null) {
+ this.instance = new Engine();
+ }
+
+ return this.instance;
+ }
public getViews() {
return this.views;
--
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