src/app.module.ts

@@ -1,21 +1,14 @@
 import { Module } from '@nestjs/common';
-import { ConfigModule } from '@nestjs/config';
 import { AppController } from './app.controller';
 import { AppService } from './app.service';
-import { TypeOrmModule } from '@nestjs/typeorm';
+import { PrinterController } from './controller/printer.controller';
-import { typeOrmConfig } from './config/typeorm.config';
+import { PrinterService } from './services/printer.service';
-import { ListPrinterController } from './controller/list-printer.controller';
-import { ListPrinterService } from './services/create-printer'; 
 import { PrinterProcessor } from './services/printer.processor';
-import { BullQueuesModule } from './config/BullModule';
+import { InfrastructureModule } from './infrastructure/infrastructure.module';
 
 @Module({
-  imports: [
+  imports: [InfrastructureModule],
-    ConfigModule.forRoot({ isGlobal: true }),
+  controllers: [AppController, PrinterController],
-    TypeOrmModule.forRoot(typeOrmConfig), 
+  providers: [AppService, PrinterService, PrinterProcessor],
-    BullQueuesModule
-  ],
-  controllers: [AppController, ListPrinterController],
-  providers: [AppService, ListPrinterService, PrinterProcessor],
 })
 export class AppModule {}

src/config/BullModule.ts

@@ -5,15 +5,23 @@ import { ExpressAdapter } from '@bull-board/express';
 import { BullMQAdapter } from '@bull-board/api/bullMQAdapter';
 import { ConfigModule, ConfigService } from '@nestjs/config';
 
+function stripWrappingQuotes(value: string | undefined): string | undefined {
+  if (value == null) return undefined;
+  const trimmed = value.trim();
+  return trimmed.replace(/^['"](.*)['"]$/, '$1');
+}
+
 @Module({
   imports: [
     BullModule.forRootAsync({
       imports: [ConfigModule],
       useFactory: async (configService: ConfigService) => ({
         connection: {
-          host: configService.get<string>('REDIS_HOST'),
+          host: stripWrappingQuotes(configService.get<string>('REDIS_HOST')),
-          port: configService.get<number>('REDIS_PORT') || 6379,
+          port: parseInt(configService.get<string>('REDIS_PORT') ?? '6379', 10),
-          password: configService.get<string>('REDIS_PASSWORD'),
+          password: stripWrappingQuotes(
+            configService.get<string>('REDIS_PASSWORD'),
+          ),
         },
       }),
       inject: [ConfigService],

src/config/typeorm.config.ts

@@ -1,20 +1,52 @@
-import { DataSource, DataSourceOptions } from 'typeorm';
+import { Logger } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { TypeOrmModuleOptions } from '@nestjs/typeorm';
+import { DataSourceOptions } from 'typeorm';
 
-export const typeOrmConfig: DataSourceOptions = {
+export function createTypeOrmOptions(
-  type: 'oracle',
+  configService: ConfigService,
-  username: process.env.DB_USERNAME || 'teste',
+): TypeOrmModuleOptions {
-  password: process.env.DB_PASSWORD || 'teste',
+  const baseOptions: DataSourceOptions = {
-  connectString:
+    type: 'oracle',
-    process.env.DB_CONNECT_STRING ||
+    username: configService.get<string>('DB_USERNAME') || 'teste',
-    '(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.1.1.241)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=BDTESTE)))',
+    password: configService.get<string>('DB_PASSWORD') || 'teste',
-  synchronize: false,
+    connectString:
-  logging: true,
+      configService.get<string>('DB_CONNECT_STRING') ||
-  entities: [__dirname + '/../**/*.{entity,view}.{js,ts}'],
+      '(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.1.1.241)(PORT=1521))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=BDTESTE)))',
-  subscribers: [process.env.DB_SUBSCRIBERS_PATH || 'dist/subscriber/*.js'],
+    synchronize: false,
-  extra: {
+    logging: true,
-    poolSize: parseInt(process.env.DB_POOL_SIZE || '10', 10),
+    entities: [__dirname + '/../**/*.{entity,view}.{js,ts}'],
-    maxRows: parseInt(process.env.DB_MAX_ROWS || '1000', 10),
+    subscribers: [
-  },
+      configService.get<string>('DB_SUBSCRIBERS_PATH') ||
-};
+        'dist/subscriber/*.js',
+    ],
+    extra: {
+      poolSize: parseInt(configService.get<string>('DB_POOL_SIZE') || '10', 10),
+      maxRows: parseInt(configService.get<string>('DB_MAX_ROWS') || '1000', 10),
+    },
+  };
 
-export const AppDataSource = new DataSource(typeOrmConfig);
+  const retryAttempts = parseInt(
+    configService.get<string>('DB_RETRY_ATTEMPTS') || '5',
+    10,
+  );
+  const retryDelayMs = parseInt(
+    configService.get<string>('DB_RETRY_DELAY_MS') || '2000',
+    10,
+  );
+
+  const logger = new Logger('TypeORM');
+
+  logger.debug(
+    `TypeORM configured for manual initialization (retryAttempts=${retryAttempts}, retryDelayMs=${retryDelayMs}).`,
+  );
+
+  return {
+    ...baseOptions,
+
+    manualInitialization: true,
+
+    retryAttempts: 0,
+    retryDelay: 0,
+  };
+}

src/controller/printer.controller.ts

@@ -1,6 +1,14 @@
-import { Controller, Post, Body, Get, HttpCode, HttpStatus, Param } from '@nestjs/common';
+import {
+  Controller,
+  Post,
+  Body,
+  Get,
+  HttpCode,
+  HttpStatus,
+  Param,
+} from '@nestjs/common';
 import { ApiTags, ApiOperation, ApiResponse } from '@nestjs/swagger';
-import { ListPrinterService } from '../services/create-printer';
+import { PrinterService } from '../services/printer.service';
 import { PrintDataDto } from '../dto/print-data.dto';
 import { PrintHtmlDto } from '../dto/print-html.dto';
 import { PrinterDto } from '../dto/printer.dto';
@@ -8,16 +16,18 @@ import { getPrinters } from '../services/get-printer';
 
 @ApiTags('Printer')
 @Controller('printer')
-export class ListPrinterController {
+export class PrinterController {
-  constructor(private readonly printerService: ListPrinterService) {}
+  constructor(private readonly printerService: PrinterService) {}
 
   @Post(':printerName/print')
   @HttpCode(HttpStatus.OK)
-  @ApiOperation({ summary: 'Envia um comando de impressão de texto simples (ESC/POS)' })
+  @ApiOperation({
+    summary: 'Envia um comando de impressão de texto simples (ESC/POS)',
+  })
   @ApiResponse({ status: 200, description: 'Impressão enviada com sucesso' })
   async print(
     @Param('printerName') printerName: string,
-    @Body() printData: PrintDataDto
+    @Body() printData: PrintDataDto,
   ) {
     printData.printerInterface = printerName;
     return this.printerService.printReceipt(printData);
@@ -32,11 +42,14 @@ export class ListPrinterController {
 
   @Post(':printerName/print-html')
   @HttpCode(HttpStatus.OK)
-  @ApiOperation({ summary: 'Converte HTML para PDF e imprime na impressora especificada na URL' })
+  @ApiOperation({
+    summary:
+      'Converte HTML para PDF e imprime na impressora especificada na URL',
+  })
   @ApiResponse({ status: 200, description: 'HTML enviado para impressão' })
   async printHtml(
     @Param('printerName') printerName: string,
-    @Body() printHtmlDto: PrintHtmlDto
+    @Body() printHtmlDto: PrintHtmlDto,
   ) {
     printHtmlDto.printerName = printerName;
     return this.printerService.printHtml(printHtmlDto);
@@ -54,7 +67,7 @@ export class ListPrinterController {
   @ApiResponse({
     status: 200,
     description: 'Lista de impressoras encontradas',
-    type: [PrinterDto] 
+    type: [PrinterDto],
   })
   async listPrinters() {
     return getPrinters();

src/database/database.module.ts

@@ -0,0 +1,31 @@
+import { DynamicModule, Module } from '@nestjs/common';
+import { ConfigModule, ConfigService } from '@nestjs/config';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { createTypeOrmOptions } from '../config/typeorm.config';
+import { parseBooleanEnv } from '../helpers/env.helper';
+import { OracleDbInitializer } from './oracle-db.initializer';
+
+@Module({})
+export class DatabaseModule {
+  static register(): DynamicModule {
+    const dbEnabled = parseBooleanEnv(process.env.DB_ENABLED, true);
+
+    if (!dbEnabled) {
+      return { module: DatabaseModule };
+    }
+
+    return {
+      module: DatabaseModule,
+      imports: [
+        TypeOrmModule.forRootAsync({
+          imports: [ConfigModule],
+          inject: [ConfigService],
+          useFactory: (configService: ConfigService) =>
+            createTypeOrmOptions(configService),
+        }),
+      ],
+      providers: [OracleDbInitializer],
+      exports: [TypeOrmModule],
+    };
+  }
+}

src/database/oracle-db.initializer.ts

@@ -0,0 +1,64 @@
+import { Injectable, Logger, OnApplicationBootstrap } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { DataSource } from 'typeorm';
+import { parseBooleanEnv } from '../helpers/env.helper';
+
+@Injectable()
+export class OracleDbInitializer implements OnApplicationBootstrap {
+  private readonly logger = new Logger(OracleDbInitializer.name);
+
+  constructor(
+    private readonly dataSource: DataSource,
+    private readonly configService: ConfigService,
+  ) {}
+
+  onApplicationBootstrap(): void {
+    const enabled = parseBooleanEnv(
+      this.configService.get<string>('DB_ENABLED'),
+      true,
+    );
+    if (!enabled) {
+      this.logger.log('DB initialization skipped (DB_ENABLED=false).');
+      return;
+    }
+
+    if (this.dataSource.isInitialized) return;
+
+    void this.initializeWithRetry();
+  }
+
+  private async initializeWithRetry(): Promise<void> {
+    const attempts = parseInt(
+      this.configService.get<string>('DB_RETRY_ATTEMPTS') || '5',
+      10,
+    );
+    const baseDelayMs = parseInt(
+      this.configService.get<string>('DB_RETRY_DELAY_MS') || '2000',
+      10,
+    );
+
+    for (let attempt = 1; attempt <= attempts; attempt++) {
+      try {
+        await this.dataSource.initialize();
+        this.logger.log(
+          `Oracle DB connected (attempt ${attempt}/${attempts}).`,
+        );
+        return;
+      } catch (err) {
+        const message = err instanceof Error ? err.message : String(err);
+        this.logger.warn(
+          `Oracle DB connection failed (attempt ${attempt}/${attempts}): ${message}`,
+        );
+
+        if (attempt < attempts) {
+          const delay = baseDelayMs * attempt;
+          await new Promise((resolve) => setTimeout(resolve, delay));
+        }
+      }
+    }
+
+    this.logger.error(
+      `Oracle DB unreachable after ${attempts} attempts; continuing without DB (degraded mode).`,
+    );
+  }
+}

src/helpers/env.helper.ts

@@ -0,0 +1,15 @@
+export function parseBooleanEnv(
+  value: string | undefined,
+  defaultValue: boolean,
+): boolean {
+  if (value == null) return defaultValue;
+
+  const normalized = value
+    .trim()
+    .replace(/^['"]|['"]$/g, '')
+    .toLowerCase();
+
+  if (normalized === 'true') return true;
+  if (normalized === 'false') return false;
+  return defaultValue;
+}

src/infrastructure/infrastructure.module.ts

@@ -0,0 +1,15 @@
+import { Global, Module } from '@nestjs/common';
+import { ConfigModule } from '@nestjs/config';
+import { BullQueuesModule } from '../config/BullModule';
+import { DatabaseModule } from '../database/database.module';
+
+@Global()
+@Module({
+  imports: [
+    ConfigModule.forRoot({ isGlobal: true }),
+    DatabaseModule.register(),
+    BullQueuesModule,
+  ],
+  exports: [BullQueuesModule, DatabaseModule],
+})
+export class InfrastructureModule {}

src/main.ts

@@ -1,11 +1,21 @@
 import { NestFactory } from '@nestjs/core';
 import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
+import { json, urlencoded } from 'express';
 import { AppModule } from './app.module';
 import { initializeOracleClient } from './helpers/oracle.helper';
 
+function getBodyLimit(): string {
+  const raw = process.env.BODY_LIMIT || '2mb';
+  return raw.trim().replace(/^['"]|['"]$/g, '');
+}
+
 async function bootstrap() {
   initializeOracleClient();
-  const app = await NestFactory.create(AppModule);
+  const app = await NestFactory.create(AppModule, { bodyParser: false });
+
+  const bodyLimit = getBodyLimit();
+  app.use(json({ limit: bodyLimit }));
+  app.use(urlencoded({ extended: true, limit: bodyLimit }));
 
   const config = new DocumentBuilder()
     .setTitle('API Documentation')

src/services/printer.service.ts

@@ -6,12 +6,14 @@ import { PrintHtmlDto } from '../dto/print-html.dto';
 import { ThermalPrinter, PrinterTypes } from 'node-thermal-printer';
 
 @Injectable()
-export class ListPrinterService {
+export class PrinterService {
   private readonly printerType = PrinterTypes.EPSON;
 
   constructor(@InjectQueue('printer') private printerQueue: Queue) {}
 
-  async printReceipt(data: PrintDataDto): Promise<{ success: boolean; message: string }> {
+  async printReceipt(
+    data: PrintDataDto,
+  ): Promise<{ success: boolean; message: string }> {
     if (!data.lines?.length) {
       return { success: false, message: 'No lines provided' };
     }
@@ -19,7 +21,11 @@ export class ListPrinterService {
     try {
       let printerInterface = data.printerInterface;
 
-      if (printerInterface && !printerInterface.includes('://') && !printerInterface.startsWith('printer:')) {
+      if (
+        printerInterface &&
+        !printerInterface.includes('://') &&
+        !printerInterface.startsWith('printer:')
+      ) {
         printerInterface = `printer:${printerInterface}`;
       }
 
@@ -49,7 +55,7 @@ export class ListPrinterService {
     } catch (error) {
       return {
         success: false,
-        message: `Print failed: ${error.message || error}` 
+        message: `Print failed: ${error.message || error}`,
       };
     }
   }
@@ -66,11 +72,15 @@ export class ListPrinterService {
     return printer.alignLeft();
   }
 
-  async printHtml(data: PrintHtmlDto): Promise<{ success: boolean; message: string; jobId?: string }> {
+  async printHtml(
+    data: PrintHtmlDto,
+  ): Promise<{ success: boolean; message: string; jobId?: string }> {
     const jobOptions: any = {};
 
     if (data.jobId) {
-      const safeJobId = /^\d+$/.test(data.jobId) ? `print-${data.jobId}` : data.jobId;
+      const safeJobId = /^\d+$/.test(data.jobId)
+        ? `print-${data.jobId}`
+        : data.jobId;
       jobOptions.jobId = safeJobId;
     }
 
@@ -79,7 +89,7 @@ export class ListPrinterService {
     return {
       success: true,
       message: 'Tarefa enviada para a fila de impressão',
-      jobId: job.id 
+      jobId: job.id,
     };
   }
 }