diff --git a/drools/.gitignore b/drools/.gitignore new file mode 100644 index 0000000..549e00a --- /dev/null +++ b/drools/.gitignore @@ -0,0 +1,33 @@ +HELP.md +target/ +!.mvn/wrapper/maven-wrapper.jar +!**/src/main/**/target/ +!**/src/test/**/target/ + +### STS ### +.apt_generated +.classpath +.factorypath +.project +.settings +.springBeans +.sts4-cache + +### IntelliJ IDEA ### +.idea +*.iws +*.iml +*.ipr + +### NetBeans ### +/nbproject/private/ +/nbbuild/ +/dist/ +/nbdist/ +/.nb-gradle/ +build/ +!**/src/main/**/build/ +!**/src/test/**/build/ + +### VS Code ### +.vscode/ diff --git a/drools/README.md b/drools/README.md new file mode 100644 index 0000000..c912aec --- /dev/null +++ b/drools/README.md @@ -0,0 +1,11 @@ +# demo-request-scope + +《基于ThreadLocal实现一个上下文管理组件》技术博客对应源码 + +https://juejin.cn/post/7153287656624324638 + +本文基于`ThreadLocal`原理,实现了一个上下文状态管理组件`Scope`,通过开启一个自定义的`Scope`,在`Scope`范围内,可以通过`Scope`各个方法读写数据; + +通过自定义线程池实现上下文状态数据的线程间传递; + +提出了一种基于`Filter`和`Scope`的`Request`粒度的上下文管理方案。 diff --git a/drools/pom.xml b/drools/pom.xml new file mode 100644 index 0000000..acad05f --- /dev/null +++ b/drools/pom.xml @@ -0,0 +1,82 @@ + + + 4.0.0 + + org.springframework.boot + spring-boot-starter-parent + 2.7.4 + + + com.example + demo-request-scope + 0.0.1-SNAPSHOT + demo-request-scope + Demo project for Spring Boot + + 8 + + + + + + + org.drools + drools-core + 7.59.0.Final + + + org.drools + drools-compiler + 7.59.0.Final + + + org.drools + drools-decisiontables + 7.59.0.Final + + + + com.google.guava + guava + 30.1-jre + + + + org.springframework.boot + spring-boot-starter-aop + + + + + org.springframework.boot + spring-boot-starter-web + + + + org.springframework.boot + spring-boot-starter-test + test + + + + org.projectlombok + lombok + true + + + junit + junit + + + + + + + org.springframework.boot + spring-boot-maven-plugin + + + + + diff --git a/drools/src/main/java/com/example/demo/DemoRequestScopeApplication.java b/drools/src/main/java/com/example/demo/DemoRequestScopeApplication.java new file mode 100644 index 0000000..4c0d58d --- /dev/null +++ b/drools/src/main/java/com/example/demo/DemoRequestScopeApplication.java @@ -0,0 +1,13 @@ +package com.example.demo; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; + +@SpringBootApplication +public class DemoRequestScopeApplication { + + public static void main(String[] args) { + SpringApplication.run(DemoRequestScopeApplication.class, args); + } + +} diff --git a/drools/src/main/java/com/example/demo/config/DroolsConfig.java b/drools/src/main/java/com/example/demo/config/DroolsConfig.java new file mode 100644 index 0000000..8710281 --- /dev/null +++ b/drools/src/main/java/com/example/demo/config/DroolsConfig.java @@ -0,0 +1,29 @@ +package com.example.demo.config; + + +import org.kie.api.KieServices; +import org.kie.api.builder.KieBuilder; +import org.kie.api.builder.KieFileSystem; +import org.kie.api.builder.KieModule; +import org.kie.api.runtime.KieContainer; +import org.kie.internal.io.ResourceFactory; +import org.springframework.context.annotation.Bean; +import org.springframework.context.annotation.Configuration; + +@Configuration +public class DroolsConfig { + // 制定规则文件的路径 + private static final String RULES_CUSTOMER_RULES_DRL = "rules/customer-discount.drl"; + private static final KieServices kieServices = KieServices.Factory.get(); + + @Bean + public KieContainer kieContainer() { + KieFileSystem kieFileSystem = kieServices.newKieFileSystem(); + kieFileSystem.write(ResourceFactory.newClassPathResource(RULES_CUSTOMER_RULES_DRL)); + KieBuilder kb = kieServices.newKieBuilder(kieFileSystem); + kb.buildAll(); + KieModule kieModule = kb.getKieModule(); + KieContainer kieContainer = kieServices.newKieContainer(kieModule.getReleaseId()); + return kieContainer; + } +} \ No newline at end of file diff --git a/drools/src/main/java/com/example/demo/controller/OrderDiscountController.java b/drools/src/main/java/com/example/demo/controller/OrderDiscountController.java new file mode 100644 index 0000000..5dbd14a --- /dev/null +++ b/drools/src/main/java/com/example/demo/controller/OrderDiscountController.java @@ -0,0 +1,35 @@ +package com.example.demo.controller; + + +import com.example.demo.request.OrderDiscount; +import com.example.demo.request.OrderRequest; +import com.example.demo.service.OrderDiscountService; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.http.HttpStatus; +import org.springframework.http.ResponseEntity; +import org.springframework.web.bind.annotation.PostMapping; +import org.springframework.web.bind.annotation.RequestBody; +import org.springframework.web.bind.annotation.RestController; + +/** + * Spring Boot 整合 规则引擎Drools,很强! + * *网上购物, + * * 需要根据不同的规则计算商品折扣, + * * 比如VIP客户增加5%的折扣, + * * 购买金额超过1000元的增加10%的折扣等, + * * 而且这些规则可能随时发生变化, + * * 甚至增加新的规则。 + * * 我们可以通过规则引擎来实现,Drools 就是一个开源的业务规则引擎 + */ +@RestController +public class OrderDiscountController { + + @Autowired + private OrderDiscountService orderDiscountService; + + @PostMapping("/get-discount") + public ResponseEntity getDiscount(@RequestBody OrderRequest orderRequest) { + OrderDiscount discount = orderDiscountService.getDiscount(orderRequest); + return new ResponseEntity<>(discount, HttpStatus.OK); + } +} \ No newline at end of file diff --git a/drools/src/main/java/com/example/demo/request/CustomerType.java b/drools/src/main/java/com/example/demo/request/CustomerType.java new file mode 100644 index 0000000..2ddf07b --- /dev/null +++ b/drools/src/main/java/com/example/demo/request/CustomerType.java @@ -0,0 +1,15 @@ +package com.example.demo.request; + +/** + * @className: CustomerType + * @author: woniu + * @date: 2023/4/25 + **/ +public enum CustomerType { + LOYAL, NEW, DISSATISFIED; + + public String getValue() { + return this.toString(); + } + +} diff --git a/drools/src/main/java/com/example/demo/request/OrderDiscount.java b/drools/src/main/java/com/example/demo/request/OrderDiscount.java new file mode 100644 index 0000000..969660d --- /dev/null +++ b/drools/src/main/java/com/example/demo/request/OrderDiscount.java @@ -0,0 +1,15 @@ +package com.example.demo.request; + + +import lombok.Getter; +import lombok.Setter; + +@Getter +@Setter +public class OrderDiscount { + + /** + * 折扣 + */ + private Integer discount = 0; +} diff --git a/drools/src/main/java/com/example/demo/request/OrderRequest.java b/drools/src/main/java/com/example/demo/request/OrderRequest.java new file mode 100644 index 0000000..bcf76b8 --- /dev/null +++ b/drools/src/main/java/com/example/demo/request/OrderRequest.java @@ -0,0 +1,26 @@ +package com.example.demo.request; + + +import lombok.Getter; +import lombok.Setter; + +@Getter +@Setter +public class OrderRequest { + /** + * 客户号 + */ + private String customerNumber; + /** + * 年龄 + */ + private Integer age; + /** + * 订单金额 + */ + private Integer amount; + /** + * 客户类型 + */ + private CustomerType customerType; +} \ No newline at end of file diff --git a/drools/src/main/java/com/example/demo/service/OrderDiscountService.java b/drools/src/main/java/com/example/demo/service/OrderDiscountService.java new file mode 100644 index 0000000..33d09a3 --- /dev/null +++ b/drools/src/main/java/com/example/demo/service/OrderDiscountService.java @@ -0,0 +1,30 @@ +package com.example.demo.service; + +import com.example.demo.request.OrderDiscount; +import com.example.demo.request.OrderRequest; +import org.kie.api.runtime.KieContainer; +import org.kie.api.runtime.KieSession; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.stereotype.Service; + +@Service +public class OrderDiscountService { + + @Autowired + private KieContainer kieContainer; + + public OrderDiscount getDiscount(OrderRequest orderRequest) { + OrderDiscount orderDiscount = new OrderDiscount(); + // 开启会话 + KieSession kieSession = kieContainer.newKieSession(); + // 设置折扣对象 + kieSession.setGlobal("orderDiscount", orderDiscount); + // 设置订单对象 + kieSession.insert(orderRequest); + // 触发规则 + kieSession.fireAllRules(); + // 中止会话 + kieSession.dispose(); + return orderDiscount; + } +} diff --git a/drools/src/main/resources/application.properties b/drools/src/main/resources/application.properties new file mode 100644 index 0000000..8b13789 --- /dev/null +++ b/drools/src/main/resources/application.properties @@ -0,0 +1 @@ + diff --git a/drools/src/main/resources/application.yml b/drools/src/main/resources/application.yml new file mode 100644 index 0000000..1be49ec --- /dev/null +++ b/drools/src/main/resources/application.yml @@ -0,0 +1,21 @@ +#spring: +# redis: +# database: 0 +# # Redis服务器地址 写你的ip +# host: 192.168.56.10 +# # Redis服务器连接端口 +# port: 6379 +# # Redis服务器连接密码(默认为空) +# password: 123456 +# # 连接池最大连接数(使用负值表示没有限制 类似于mysql的连接池 +# jedis: +# pool: +# max-active: 200 +# # 连接池最大阻塞等待时间(使用负值表示没有限制) 表示连接池的链接拿完了 现在去申请需要等待的时间 +# max-wait: -1 +# # 连接池中的最大空闲连接 +# max-idle: 10 +# # 连接池中的最小空闲连接 +# min-idle: 0 +# # 连接超时时间(毫秒) 去链接redis服务端 +# timeout: 6000 \ No newline at end of file diff --git a/drools/src/main/resources/rules/customer-discount.drl b/drools/src/main/resources/rules/customer-discount.drl new file mode 100644 index 0000000..6a9469f --- /dev/null +++ b/drools/src/main/resources/rules/customer-discount.drl @@ -0,0 +1,38 @@ +package rules + +import com.example.demo.request.OrderRequest; +import com.example.demo.request.CustomerType; + +global com.example.demo.request.OrderDiscount orderDiscount; + +dialect "mvel" + +// 规则1: 根据年龄判断 +rule "Age based discount" +when +// 当客户年龄在20岁以下或者50岁以上 +OrderRequest(age < 20 || age > 50) +then +// 则添加10%的折扣 +System.out.println("==========Adding 10% discount for Kids/ senior customer============="); +orderDiscount.setDiscount(orderDiscount.getDiscount() + 10); +end + +// 规则2: 根据客户类型的规则 +rule "Customer type based discount - Loyal customer" +when +// 当客户类型是LOYAL +OrderRequest(customerType.getValue == "LOYAL") +then +// 则增加5%的折扣 +System.out.println("==========Adding 5% discount for LOYAL customer============="); +orderDiscount.setDiscount(orderDiscount.getDiscount() + 5); +end + +rule "Customer type based discount - others" +when +OrderRequest(customerType.getValue != "LOYAL") +then +System.out.println("==========Adding 3% discount for NEW or DISSATISFIED customer============="); +orderDiscount.setDiscount(orderDiscount.getDiscount() + 3); +end diff --git a/drools/src/test/java/com/example/demo/testscope/TestMain.java b/drools/src/test/java/com/example/demo/testscope/TestMain.java new file mode 100644 index 0000000..d068e13 --- /dev/null +++ b/drools/src/test/java/com/example/demo/testscope/TestMain.java @@ -0,0 +1,172 @@ +package com.example.demo.testscope; + +import lombok.AllArgsConstructor; +import lombok.Data; +import org.junit.jupiter.api.Test; + +import java.util.*; +import java.util.stream.Collectors; +import java.util.stream.Stream; + +public class TestMain { + +//工作中常用的一些Stream流操作,多年实践总结 + + /** + * 演示map的用途:一对一转换 + */ + @Test + public void stringToIntMap() { + List ids = Arrays.asList("205", "105", "308", "469", "627", "193", "111"); + // 使用流操作 + List results = ids.stream() + .map(id -> { + User user = new User(Integer.valueOf(id)); + return user; + }) + .collect(Collectors.toList()); + System.out.println(results); + } + + + /** + * 演示map的用途:一对多转换 + */ + @Test + public void stringToIntFlatmap() { + List sentences = Arrays.asList("hello world", "Jia Gou Wu Dao"); + // 使用流操作 + List results = sentences.stream() + .flatMap(sentence -> Arrays.stream(sentence.split(" "))) + .collect(Collectors.toList()); + System.out.println(results); + } + + + + + + /** + *filter、sorted、distinct、limit + */ + @Test + public void testGetTargetUsers() { + List ids = Arrays.asList("205", "10", "308", "49", "627", "193", "111", "193"); + // 使用流操作 + List results = ids.stream() + .filter(s -> s.length() > 2) + .distinct() + .map(Integer::valueOf) + .sorted(Comparator.comparingInt(o -> o)) + .limit(3) + .map(id -> new User(id)) + .collect(Collectors.toList()); + System.out.println(results); + } + + + + + /** + * 简单结果终止方法 + */ + @Test + public void testSimpleStopOptions() { + List ids = Arrays.asList("205", "10", "308", "49", "627", "193", "111", "193"); + // 统计stream操作后剩余的元素个数 + System.out.println(ids.stream().filter(s -> s.length() > 2).count()); + // 判断是否有元素值等于205 + System.out.println(ids.stream().filter(s -> s.length() > 2).anyMatch("205"::equals)); + // findFirst操作 + ids.stream().filter(s -> s.length() > 2) + .findFirst() + .ifPresent(s -> System.out.println("findFirst:" + s)); + } + + + + + + /** + * 一旦一个Stream被执行了终止操作之后,后续便不可以再读这个流执行其他的操作了,否则会报错 + */ + @Test + public void testHandleStreamAfterClosed() { + List ids = Arrays.asList("205", "10", "308", "49", "627", "193", "111", "193"); + Stream stream = ids.stream().filter(s -> s.length() > 2); + // 统计stream操作后剩余的元素个数 + System.out.println(stream.count()); + System.out.println("-----下面会报错-----"); + // 判断是否有元素值等于205 + try { + System.out.println(stream.anyMatch("205"::equals)); + } catch (Exception e) { + e.printStackTrace(); + } + System.out.println("-----上面会报错-----"); + } + + + /** + * 生成集合 + */ + @Test + public void testCollectStopOptions() { + List ids = Arrays.asList(new User(17), new User(22), new User(23)); + // collect成list + List collectList = ids.stream().filter(dept -> dept.getId() > 20) + .collect(Collectors.toList()); + System.out.println("collectList:" + collectList); + // collect成Set + Set collectSet = ids.stream().filter(dept -> dept.getId() > 20) + .collect(Collectors.toSet()); + System.out.println("collectSet:" + collectSet); + // collect成HashMap,key为id,value为Dept对象 + Map collectMap = ids.stream().filter(dept -> dept.getId() > 20) + .collect(Collectors.toMap(com.example.demo.testscope.User::getId, dept -> dept)); + System.out.println("collectMap:" + collectMap); + } + + + + + /** + * 生成拼接字符串 + */ + @Test + public void testCollectJoinStrings() { + List ids = Arrays.asList("205", "10", "308", "49", "627", "193", "111", "193"); + String joinResult = ids.stream().collect(Collectors.joining(",")); + System.out.println("拼接后:" + joinResult); + } + + + + + + /** + * 数学运算 + */ + @Test + public void testNumberCalculate() { + List ids = Arrays.asList(10, 20, 30, 40, 50); + // 计算平均值 + Double average = ids.stream().collect(Collectors.averagingInt(value -> value)); + System.out.println("平均值:" + average); + // 数据统计信息 + IntSummaryStatistics summary = ids.stream().collect(Collectors.summarizingInt(value -> value)); + System.out.println("数据统计信息: " + summary); + } + + + + +} + + +@Data +@AllArgsConstructor +class User { + private int id; + +} \ No newline at end of file