fix(templates): ensure proper asynchronous initialization of DB connection pool

The DBConnector class constructor was calling an asynchronous function, leading to potential errors when the pool was not fully initialized before being used. This fix moves the asynchronous pool creation to a separate init method, ensuring the pool is ready before any connections are attempted.

Closes #89

Author: JuanVillegas95

templates/app/utils/db/index.cjs

@@ -12,20 +12,38 @@ oracledb.autoCommit = true;
 
 class DBConnector {
     constructor() {
-        this.pool = oracledb.createPool({
-            ...dbConfig,
-            poolMax: 10,
-            poolMin: 10
-        });
+        this.pool = null;
     }
 
-    getConnection(options = {}) {
-        const pool = oracledb.getPool();
-        return pool.getConnection({
-            ...dbConfig,
-            ...options
-        });
+    async init() {
+        try {
+            this.pool = await oracledb.createPool({
+                ...dbConfig,
+                poolMax: 10,
+                poolMin: 10
+            });
+            console.log('Connection pool created successfully.');
+        } catch (error) {
+            console.error('Error creating connection pool:', error);
+            throw error;
+        }
+    }
+
+    async getConnection(options = {}) {
+        if (!this.pool) {
+            throw new Error('Connection pool not initialized.');
+        }
+        try {
+            const connection = await this.pool.getConnection({
+                ...dbConfig,
+                ...options
+            });
+            return connection;
+        } catch (error) {
+            console.error('Error getting connection:', error);
+            throw error;
+        }
     }
 }
 
-module.exports = new DBConnector();
+module.exports = new DBConnector();

templates/app/utils/rest-services/connection.cjs

@@ -7,11 +7,12 @@
 const db = require( '../db/index.cjs' );
 
 exports.getStatus = async function () {
+    await db.init();
     const connection = await db.getConnection();
     const result = await connection.execute( 'select 1 from dual' );
     await connection.close();
 
     return {
         status: 'ok',
     }
-};
+};