Advanced Java & Angular Deep Dives (5+ Years Experience)

 Here are practical examples and patterns for senior full-stack developers, focusing on production-grade solutions:

🚀 1. High-Concurrency Java with Virtual Threads (Java 21+)

Scenario: Handle 10K+ concurrent requests efficiently for a trading platform.

java

// Spring Boot 3.2 + Virtual Threads
@Configuration
@EnableAsync
public class ThreadConfig implements AsyncConfigurer {
    @Override
    public Executor getAsyncExecutor() {
        return Executors.newVirtualThreadPerTaskExecutor();
    }
}

@Service
public class TradeService {
    @Async
    public CompletableFuture<TradeResponse> executeTrade(TradeRequest request) {
        // Non-blocking I/O operations
        return CompletableFuture.completedFuture(processTrade(request));
    }
}

// Resilience with TimeLimiter and Bulkhead
@Bean
public TimeLimiterConfig timeLimiterConfig() {
    return TimeLimiterConfig.custom()
            .timeoutDuration(Duration.ofMillis(500))
            .build();
}

Key Optimizations:

• Virtual threads for non-blocking I/O

• Resilience4j for circuit breaking

• Loom-friendly connection pooling (HikariCP)

---

🔥 2. Angular Micro Frontend Architecture

Scenario: Modularize enterprise ERP into domain-specific sub-apps.

typescript

// shell-app (main entry)
@NgModule({
  imports: [
    RouterModule.forRoot([{
      path: 'hr',
      loadChildren: () => loadRemoteModule({
        remoteEntry: 'http://hr-app.domain.com/remoteEntry.js',
        remoteName: 'hr',
        exposedModule: './HRModule'
      }).then(m => m.HRModule)
    }])
  ]
})
export class ShellAppModule {}

// Dynamic component loader in shell
const compFactory = this.cfr.resolveComponentFactory(
  await loadRemoteModule('hr').then(m => m.EmployeeListComponent)
);
this.vcRef.createComponent(compFactory);

Deployment Strategy:

• Webpack Module Federation

• Shared dependency management (Angular version sync)

• Centralized auth token propagation

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