马府强
2 years ago
14 changed files with 521 additions and 0 deletions
@ -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/ |
@ -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。 |
@ -0,0 +1,82 @@ |
|||||
|
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> |
||||
|
<modelVersion>4.0.0</modelVersion> |
||||
|
<parent> |
||||
|
<groupId>org.springframework.boot</groupId> |
||||
|
<artifactId>spring-boot-starter-parent</artifactId> |
||||
|
<version>2.7.4</version> |
||||
|
<relativePath/> <!-- lookup parent from repository --> |
||||
|
</parent> |
||||
|
<groupId>com.example</groupId> |
||||
|
<artifactId>demo-request-scope</artifactId> |
||||
|
<version>0.0.1-SNAPSHOT</version> |
||||
|
<name>demo-request-scope</name> |
||||
|
<description>Demo project for Spring Boot</description> |
||||
|
<properties> |
||||
|
<java.version>8</java.version> |
||||
|
</properties> |
||||
|
|
||||
|
|
||||
|
<dependencies> |
||||
|
|
||||
|
<dependency> |
||||
|
<groupId>org.drools</groupId> |
||||
|
<artifactId>drools-core</artifactId> |
||||
|
<version>7.59.0.Final</version> |
||||
|
</dependency> |
||||
|
<dependency> |
||||
|
<groupId>org.drools</groupId> |
||||
|
<artifactId>drools-compiler</artifactId> |
||||
|
<version>7.59.0.Final</version> |
||||
|
</dependency> |
||||
|
<dependency> |
||||
|
<groupId>org.drools</groupId> |
||||
|
<artifactId>drools-decisiontables</artifactId> |
||||
|
<version>7.59.0.Final</version> |
||||
|
</dependency> |
||||
|
|
||||
|
<dependency> |
||||
|
<groupId>com.google.guava</groupId> |
||||
|
<artifactId>guava</artifactId> |
||||
|
<version>30.1-jre</version> |
||||
|
</dependency> |
||||
|
|
||||
|
<dependency> |
||||
|
<groupId>org.springframework.boot</groupId> |
||||
|
<artifactId>spring-boot-starter-aop</artifactId> |
||||
|
</dependency> |
||||
|
|
||||
|
|
||||
|
<dependency> |
||||
|
<groupId>org.springframework.boot</groupId> |
||||
|
<artifactId>spring-boot-starter-web</artifactId> |
||||
|
</dependency> |
||||
|
|
||||
|
<dependency> |
||||
|
<groupId>org.springframework.boot</groupId> |
||||
|
<artifactId>spring-boot-starter-test</artifactId> |
||||
|
<scope>test</scope> |
||||
|
</dependency> |
||||
|
|
||||
|
<dependency> |
||||
|
<groupId>org.projectlombok</groupId> |
||||
|
<artifactId>lombok</artifactId> |
||||
|
<optional>true</optional> |
||||
|
</dependency> |
||||
|
<dependency> |
||||
|
<groupId>junit</groupId> |
||||
|
<artifactId>junit</artifactId> |
||||
|
</dependency> |
||||
|
</dependencies> |
||||
|
|
||||
|
<build> |
||||
|
<plugins> |
||||
|
<plugin> |
||||
|
<groupId>org.springframework.boot</groupId> |
||||
|
<artifactId>spring-boot-maven-plugin</artifactId> |
||||
|
</plugin> |
||||
|
</plugins> |
||||
|
</build> |
||||
|
|
||||
|
</project> |
@ -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); |
||||
|
} |
||||
|
|
||||
|
} |
@ -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; |
||||
|
} |
||||
|
} |
@ -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<OrderDiscount> getDiscount(@RequestBody OrderRequest orderRequest) { |
||||
|
OrderDiscount discount = orderDiscountService.getDiscount(orderRequest); |
||||
|
return new ResponseEntity<>(discount, HttpStatus.OK); |
||||
|
} |
||||
|
} |
@ -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(); |
||||
|
} |
||||
|
|
||||
|
} |
@ -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; |
||||
|
} |
@ -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; |
||||
|
} |
@ -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; |
||||
|
} |
||||
|
} |
@ -0,0 +1 @@ |
|||||
|
|
@ -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 |
@ -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 |
@ -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<String> ids = Arrays.asList("205", "105", "308", "469", "627", "193", "111"); |
||||
|
// 使用流操作
|
||||
|
List<User> 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<String> sentences = Arrays.asList("hello world", "Jia Gou Wu Dao"); |
||||
|
// 使用流操作
|
||||
|
List<String> 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<String> ids = Arrays.asList("205", "10", "308", "49", "627", "193", "111", "193"); |
||||
|
// 使用流操作
|
||||
|
List<User> 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<String> 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<String> ids = Arrays.asList("205", "10", "308", "49", "627", "193", "111", "193"); |
||||
|
Stream<String> 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<User> ids = Arrays.asList(new User(17), new User(22), new User(23)); |
||||
|
// collect成list
|
||||
|
List<User> collectList = ids.stream().filter(dept -> dept.getId() > 20) |
||||
|
.collect(Collectors.toList()); |
||||
|
System.out.println("collectList:" + collectList); |
||||
|
// collect成Set
|
||||
|
Set<User> 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<Integer, User> 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<String> 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<Integer> 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; |
||||
|
|
||||
|
} |
Loading…
Reference in new issue