From f2e46a602e5d048d0672ba64984b04a95df51936 Mon Sep 17 00:00:00 2001
From: Joelbrit0 <joelsonbrito90@gmail.com>
Date: Wed, 21 Jan 2026 11:45:27 -0300
Subject: [PATCH] feat: Add Oracle database integration with TypeORM and client
 initialization for the NestJS application.

---
 src/config/typeorm.config.ts | 20 ++++++++++++++++++++
 src/helpers/oracle.helper.ts | 21 +++++++++++++++++++++
 src/main.ts                  |  2 ++
 3 files changed, 43 insertions(+)
 create mode 100644 src/config/typeorm.config.ts
 create mode 100644 src/helpers/oracle.helper.ts

diff --git a/src/config/typeorm.config.ts b/src/config/typeorm.config.ts
new file mode 100644
index 0000000..2a09ac8
--- /dev/null
+++ b/src/config/typeorm.config.ts
@@ -0,0 +1,20 @@
+import { DataSource } from 'typeorm';
+import * as path from 'path';
+
+
+export const AppDataSource = new DataSource({
+  type: 'oracle',
+  username: process.env.DB_USERNAME || 'teste',
+  password: process.env.DB_PASSWORD || 'teste',
+  connectString:
+    process.env.DB_CONNECT_STRING ||
+    '(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.1.1.241)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=BDTESTE)))',
+  synchronize: false,
+  logging: true,
+  entities: [__dirname + '/../**/*.{entity,view}.{js,ts}'],
+  subscribers: [process.env.DB_SUBSCRIBERS_PATH || 'dist/subscriber/*.js'],
+  extra: {
+    poolSize: parseInt(process.env.DB_POOL_SIZE || '10', 10),
+    maxRows: parseInt(process.env.DB_MAX_ROWS || '1000', 10),
+  },
+});
diff --git a/src/helpers/oracle.helper.ts b/src/helpers/oracle.helper.ts
new file mode 100644
index 0000000..33043e9
--- /dev/null
+++ b/src/helpers/oracle.helper.ts
@@ -0,0 +1,21 @@
+import * as path from 'path';
+import * as fs from 'fs';
+import * as oracledb from 'oracledb';
+
+export function initializeOracleClient(): void {
+  try {
+    const oracleClientPath = process.env.ORACLE_CLIENT_PATH;
+    const libDir =
+      oracleClientPath && fs.existsSync(path.normalize(oracleClientPath))
+        ? path.normalize(oracleClientPath)
+        : undefined;
+
+    oracledb.initOracleClient(libDir ? { libDir } : undefined);
+  } catch (err: unknown) {
+    const errorMessage = err instanceof Error ? err.message : String(err);
+    console.warn(
+      'Oracle Client Thick mode initialization failed:',
+      errorMessage,
+    );
+  }
+}
diff --git a/src/main.ts b/src/main.ts
index 13cad38..c3255d7 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,7 +1,9 @@
 import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
+import { initializeOracleClient } from './helpers/oracle.helper';
 
 async function bootstrap() {
+  initializeOracleClient();
   const app = await NestFactory.create(AppModule);
   await app.listen(3000);
 }