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怎么在Springboot中利用高吞吐量異步處理?很多新手對此不是很清楚,為了幫助大家解決這個難題,下面小編將為大家詳細講解,有這方面需求的人可以來學習下,希望你能有所收獲。
技術(shù)要點
org.springframework.web.context.request.async.DeferredResult<T>
示例如下:
1. 新建Maven項目 async
2. 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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.java</groupId> <artifactId>async</artifactId> <version>1.0.0</version> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.5.RELEASE</version> </parent> <dependencies> <!-- Spring Boot --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- 熱部署 --> <dependency> <groupId>org.springframework</groupId> <artifactId>springloaded</artifactId> <version>1.2.8.RELEASE</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>provided</scope> </dependency> </dependencies> <build> <finalName>${project.artifactId}</finalName> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF-8</encoding> </configuration> </plugin> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <executions> <execution> <goals> <goal>repackage</goal> </goals> </execution> </executions> </plugin> </plugins> </build> </project>
3. AsyncStarter.java
package com.java; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class AsyncStarter { public static void main(String[] args) { SpringApplication.run(AsyncStarter.class, args); } }
4. AsyncVo.java
package com.java.vo; import org.springframework.web.context.request.async.DeferredResult; /** * 存儲異步處理信息 * * @author Logen * * @param <I> 接口輸入?yún)?shù) * @param <O> 接口返回參數(shù) */ public class AsyncVo<I, O> { /** * 請求參數(shù) */ private I params; /** * 響應(yīng)結(jié)果 */ private DeferredResult<O> result; public I getParams() { return params; } public void setParams(I params) { this.params = params; } public DeferredResult<O> getResult() { return result; } public void setResult(DeferredResult<O> result) { this.result = result; } }
5. RequestQueue.java
package com.java.queue; import java.util.concurrent.BlockingQueue; import java.util.concurrent.LinkedBlockingQueue; import org.springframework.stereotype.Component; import com.java.vo.AsyncVo; /** * 存放所有異步處理接口請求隊列的對象,一個接口對應(yīng)一個隊列 * * @author Logen * */ @Component public class RequestQueue { /** * 處理下訂單接口的隊列,設(shè)置緩沖容量為50 */ private BlockingQueue<AsyncVo<String, Object>> orderQueue = new LinkedBlockingQueue<>(50); public BlockingQueue<AsyncVo<String, Object>> getOrderQueue() { return orderQueue; } }
6. OrderTask.java
package com.java.task; import java.util.HashMap; import java.util.Map; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import com.java.queue.RequestQueue; import com.java.vo.AsyncVo; /** * 處理訂單接口的任務(wù),每個任務(wù)類處理一種接口 * * @author Logen * */ @Component public class OrderTask extends Thread { @Autowired private RequestQueue queue; private boolean running = true; @Override public void run() { while (running) { try { AsyncVo<String, Object> vo = queue.getOrderQueue().take(); System.out.println("[ OrderTask ]開始處理訂單"); String params = vo.getParams(); Thread.sleep(3000); Map<String, Object> map = new HashMap<>(); map.put("params", params); map.put("time", System.currentTimeMillis()); vo.getResult().setResult(map); System.out.println("[ OrderTask ]訂單處理完成"); } catch (InterruptedException e) { e.printStackTrace(); running = false; } } } public void setRunning(boolean running) { this.running = running; } }
7. QueueListener.java
package com.java.listener; import javax.annotation.PostConstruct; import javax.annotation.PreDestroy; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import com.java.task.OrderTask; /** * 隊列監(jiān)聽器,初始化啟動所有監(jiān)聽任務(wù) * * @author Logen * */ @Component public class QueueListener { @Autowired private OrderTask orderTask; /** * 初始化時啟動監(jiān)聽請求隊列 */ @PostConstruct public void init() { orderTask.start(); } /** * 銷毀容器時停止監(jiān)聽任務(wù) */ @PreDestroy public void destory() { orderTask.setRunning(false); } }
8. OrderController.java
package com.java.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.context.request.async.DeferredResult; import com.java.queue.RequestQueue; import com.java.vo.AsyncVo; /** * <blockquote> * * <pre> * * 模擬下單處理,實現(xiàn)高吞吐量異步處理請求 * * 1、 Controller層接口只接收請求,不進行處理,而是把請求信息放入到對應(yīng)該接口的請求隊列中 * 2、 該接口對應(yīng)的任務(wù)類監(jiān)聽對應(yīng)接口的請求隊列,從隊列中順序取出請求信息并進行處理 * * 優(yōu)點:接口幾乎在收到請求的同時就已經(jīng)返回,處理程序在后臺異步進行處理,大大提高吞吐量 * * * </pre> * * </blockquote> * * @author Logen * */ @RestController public class OrderController { @Autowired private RequestQueue queue; @GetMapping("/order") public DeferredResult<Object> order(String number) throws InterruptedException { System.out.println("[ OrderController ] 接到下單請求"); System.out.println("當前待處理訂單數(shù): " + queue.getOrderQueue().size()); AsyncVo<String, Object> vo = new AsyncVo<>(); DeferredResult<Object> result = new DeferredResult<>(); vo.setParams(number); vo.setResult(result); queue.getOrderQueue().put(vo); System.out.println("[ OrderController ] 返回下單結(jié)果"); return result; } }
9. 運行 AsyncStarter.java ,啟動測試
瀏覽器輸入 http://localhost:8080/order?number=10001
正常情況處理3秒返回,返回結(jié)果如下
{"time":1548241500718,"params":"10001"}
觀察控制臺打印日志,如下所示:
[ OrderController ] 接到下單請求 當前待處理訂單數(shù): 0 [ OrderController ] 返回下單結(jié)果 [ OrderTask ]開始處理訂單 [ OrderTask ]訂單處理完成
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