perf($Starter): enable Spring Boot async task

spring-boot-starter/src/main/java/com/jmsoftware/maf/springbootstarter/MafAutoConfiguration.java

@@ -27,13 +27,11 @@
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.boot.web.servlet.error.ErrorAttributes;
 import org.springframework.boot.web.servlet.error.ErrorController;
-import org.springframework.cloud.client.loadbalancer.LoadBalanced;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.core.env.Environment;
 import org.springframework.integration.annotation.IntegrationComponentScan;
-import org.springframework.web.client.RestTemplate;
 import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;
 
 import javax.annotation.PostConstruct;
@@ -56,7 +54,8 @@
         Swagger2Configuration.class,
         SftpConfiguration.class,
         WebSecurityConfiguration.class,
-        RestTemplateConfiguration.class
+        RestTemplateConfiguration.class,
+        AsyncConfiguration.class
 })
 public class MafAutoConfiguration {
     @PostConstruct

spring-boot-starter/src/main/java/com/jmsoftware/maf/springbootstarter/configuration/AsyncConfiguration.java

@@ -0,0 +1,39 @@
+package com.jmsoftware.maf.springbootstarter.configuration;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.task.AsyncTaskExecutor;
+import org.springframework.scheduling.annotation.AsyncConfigurer;
+import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+
+/**
+ * Description: AsyncConfiguration, change description here.
+ *
+ * @author 钟俊（zhongjun）, email: zhongjun@toguide.cn, date: 1/29/2021 4:39 PM
+ **/
+@Slf4j
+@EnableAsync
+@Configuration
+@RequiredArgsConstructor
+public class AsyncConfiguration implements AsyncConfigurer {
+    @Bean
+    @Override
+    public AsyncTaskExecutor getAsyncExecutor() {
+        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
+        executor.setCorePoolSize(Runtime.getRuntime().availableProcessors() * 2);
+        executor.setMaxPoolSize(100);
+        executor.setBeanName("spring-boot-starter-thread-pool-task-executor");
+        // Specify the RejectedExecutionHandler to use for the ExecutorService.
+        // Default is the ExecutorService's default abort policy.
+        executor.setRejectedExecutionHandler((runnable, executor1) -> {
+            log.error("Captured rejected execution. {}", runnable);
+            // TODO: runnable persistence
+        });
+        executor.initialize();
+        log.warn("Initial bean: '{}'", AsyncTaskExecutor.class.getSimpleName());
+        return executor;
+    }
+}