java – Spring启动mvc异步执行
内容导读
互联网集市收集整理的这篇技术教程文章主要介绍了java – Spring启动mvc异步执行,小编现在分享给大家,供广大互联网技能从业者学习和参考。文章包含4823字,纯文字阅读大概需要7分钟。
内容图文
![java – Spring启动mvc异步执行](/upload/InfoBanner/zyjiaocheng/789/be2b2a16862f4c73873603d992b8e01c.jpg)
我正在尝试使用java.util.concurrent.Callable执行最简单的异步REST控制器:
@RequestMapping("/AsyncRequest")
public Callable asyncRequest() {
return () -> {
Thread.sleep(3000);
return "reply";
};
}
然后我在浏览器中运行了两次http://localhost/AsyncRequest.
我得到的第一个答案是3秒钟,但第二个答案是在6秒钟后.
似乎请求不是异步处理的.
为什么会这样?
解决方法:
Spring Boot行为实际上取决于版本和配置.
以下配置和代码适用于我:
起动机
package com.stackoverflow.spring.boot.async;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.context.annotation.Import;
@Import(WebConfig.class)
@SpringBootApplication
public class WebMain {
private final SpringApplication application;
public WebMain() {
final SpringApplicationBuilder applicationBuilder = new SpringApplicationBuilder(WebMain.class);
application = applicationBuilder.build();
}
public SpringApplication getApplication() { return application; }
public static void main(final String[] args) {
new WebMain().getApplication().run(args);
}
}
组态
package com.stackoverflow.spring.boot.async;
import org.springframework.boot.context.embedded.ConfigurableEmbeddedServletContainer;
import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
@Configuration
public class WebConfig extends WebMvcConfigurerAdapter implements EmbeddedServletContainerCustomizer
{
public void customize(final ConfigurableEmbeddedServletContainer container) {}
}
调节器
我已将睡眠时间改为6秒,并将一些有效负载添加到响应中.
package com.stackoverflow.spring.boot.async;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.Date;
import java.util.concurrent.Callable;
@Controller
public class AsyncController {
@RequestMapping(path = "/AsyncRequest", method = RequestMethod.GET)
@ResponseBody
public Callable<String> asyncRequest() {
return () -> {
final long currentThread = Thread.currentThread().getId();
final Date requestProcessingStarted = new Date();
Thread.sleep(6000L);
final Date requestProcessingFinished = new Date();
return String.format(
"request: [threadId: %s, started: %s - finished: %s]"
, currentThread, requestProcessingStarted, requestProcessingFinished);
};
}
}
的pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.stackoverflow.spring.boot</groupId>
<artifactId>async</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<properties>
<java.version>1.8</java.version>
<spring-boot.version>1.4.1.RELEASE</spring-boot.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring-boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot</artifactId>
<version>${spring-boot.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>${spring-boot.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
<version>${spring-boot.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.5.1</version>
<inherited>true</inherited>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring-boot.version}</version>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
<configuration>
<classifier>exec</classifier>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
测试
java -version
java version "1.8.0_111"
Java(TM) SE Runtime Environment (build 1.8.0_111-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)
--
mvn spring-boot:run
...
--
# start following command from different consoles:
curl http://localhost:8080/AsyncRequest
结果
request: [threadId: 33, started: 15:50:28 - finished: 15:50:34]
request: [threadId: 35, started: 15:50:29 - finished: 15:50:35]
request: [threadId: 37, started: 15:50:30 - finished: 15:50:36]
内容总结
以上是互联网集市为您收集整理的java – Spring启动mvc异步执行全部内容,希望文章能够帮你解决java – Spring启动mvc异步执行所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错,欢迎将互联网集市网站推荐给程序员好友。
内容备注
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 gblab@vip.qq.com 举报,一经查实,本站将立刻删除。
内容手机端
扫描二维码推送至手机访问。