add

qiaoba-modules/qiaoba-module-demo/pom.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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">
+    <parent>
+        <artifactId>qiaoba-modules</artifactId>
+        <groupId>com.qiaoba</groupId>
+        <version>1.0</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>qiaoba-module-demo</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.qiaoba</groupId>
+            <artifactId>qiaoba-common-redis</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.qiaoba</groupId>
+            <artifactId>qiaoba-common-base</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.qiaoba</groupId>
+            <artifactId>qiaoba-common-web</artifactId>
+        </dependency>
+    </dependencies>
+</project>

qiaoba-modules/qiaoba-module-demo/src/main/java/com/qiaoba/module/demo/controller/Lock4jController.java

@@ -0,0 +1,37 @@
+package com.qiaoba.module.demo.controller;
+
+import com.baomidou.lock.annotation.Lock4j;
+import com.qiaoba.common.base.result.AjaxResult;
+import com.qiaoba.module.demo.service.Lock4jService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/demo/lock4j")
+@RequiredArgsConstructor
+public class Lock4jController {
+
+    private final Lock4jService lock4jService;
+
+    @GetMapping("/api-lock")
+    public AjaxResult apiLock() {
+        lock4jService.apiLock();
+        return AjaxResult.success();
+    }
+
+    /**
+     * 注解加锁
+     * expire-Redis中Key过期时间-防止死锁-默认值: 30s
+     * acquireTimeout-排队时长-超过就退出排队,抛出获取锁超时异常-默认值: 3s
+     *
+     * @return AjaxResult
+     */
+    @GetMapping("/annotation-lock")
+    @Lock4j(keys = {"#accountId"}, expire = 20000, acquireTimeout = 10000)
+    public AjaxResult annotationLock() {
+        lock4jService.annotationLock();
+        return AjaxResult.success();
+    }
+}

qiaoba-modules/qiaoba-module-demo/src/main/java/com/qiaoba/module/demo/service/Lock4jService.java

@@ -0,0 +1,14 @@
+package com.qiaoba.module.demo.service;
+
+public interface Lock4jService {
+
+    /**
+     * 分布式锁-编程式加锁
+     */
+    void apiLock();
+
+    /**
+     * 分布式锁-注解加锁
+     */
+    void annotationLock();
+}

qiaoba-modules/qiaoba-module-demo/src/main/java/com/qiaoba/module/demo/service/impl/Lock4jServiceImpl.java

@@ -0,0 +1,43 @@
+package com.qiaoba.module.demo.service.impl;
+
+import cn.hutool.core.thread.ThreadUtil;
+import com.baomidou.lock.LockInfo;
+import com.baomidou.lock.LockTemplate;
+import com.qiaoba.common.base.exceptions.ServiceException;
+import com.qiaoba.module.demo.service.Lock4jService;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+@Slf4j
+public class Lock4jServiceImpl implements Lock4jService {
+
+    private final LockTemplate lockTemplate;
+
+    @Override
+    public void apiLock() {
+        //... 各种不需要上锁的操作
+        String lockKey = "lock4j:apiLock";
+        final LockInfo lockInfo = lockTemplate.lock(lockKey);
+        //申请锁失败
+        if (null == lockInfo) {
+            throw new ServiceException("业务处理中，请稍后再试...");
+        }
+        //申请锁成功
+        try {
+            ThreadUtil.sleep(10 * 1000);
+            log.info("执行 apiLock, 当前线程{}", Thread.currentThread().getName());
+        } finally {
+            lockTemplate.releaseLock(lockInfo);
+        }
+    }
+
+    @Override
+    public void annotationLock() {
+        // 休眠 10s
+        ThreadUtil.sleep(10 * 1000);
+        log.info("执行 apiLock, 当前线程{}", Thread.currentThread().getName());
+    }
+}