Configure Custom Thread Pool for WebSocketClient in Spring Boot

To specify a custom thread pool for the 'WebSocketClient' class, you can configure the 'websocketAsyncExecutor' bean in your Spring Boot application.

First, define a 'ThreadPoolTaskExecutor' bean with the desired configuration for your thread pool. For example:

@Bean
public ThreadPoolTaskExecutor websocketAsyncExecutor() {
    ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
    executor.setCorePoolSize(10);
    executor.setMaxPoolSize(20);
    executor.setQueueCapacity(100);
    executor.setThreadNamePrefix("websocket-");
    executor.initialize();
    return executor;
}

In this example, the thread pool is configured with a core size of 10, a maximum size of 20, a queue capacity of 100, and a thread name prefix of 'websocket-'. Adjust these values according to your requirements.

Next, annotate the 'WebSocketClient' class with '@Async' and specify the 'websocketAsyncExecutor' bean as the executor to be used for asynchronous methods. For example:

@Slf4j
@Component
@Async("websocketAsyncExecutor")
public class WebSocketClient {
    // ...
}

With this configuration, the methods in the 'WebSocketClient' class will be executed asynchronously using the specified thread pool.

Note: Make sure you have the necessary dependencies (e.g., 'spring-boot-starter-websocket', 'spring-boot-starter-task', 'spring-boot-starter-json', etc.) added to your project's dependencies.