v1

.gitignore

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+logs/
+target/
+mvnw
+mvnw.cmd
+.mvn/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**
+!**/src/test/**
+
+### 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/
+
+### VS Code ###
+.vscode/

HELP.md

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+# Getting Started
+
+### Reference Documentation
+For further reference, please consider the following sections:
+
+* [Official Apache Maven documentation](https://maven.apache.org/guides/index.html)
+* [Spring Boot Maven Plugin Reference Guide](https://docs.spring.io/spring-boot/docs/2.3.0.RELEASE/maven-plugin/)
+* [Spring Web](https://docs.spring.io/spring-boot/docs/2.3.0.RELEASE/reference/htmlsingle/#boot-features-developing-web-applications)
+* [Spring Boot DevTools](https://docs.spring.io/spring-boot/docs/2.3.0.RELEASE/reference/htmlsingle/#using-boot-devtools)
+* [Validation](https://docs.spring.io/spring-boot/docs/2.3.0.RELEASE/reference/htmlsingle/#boot-features-validation)
+
+### Guides
+The following guides illustrate how to use some features concretely:
+
+* [Building a RESTful Web Service](https://spring.io/guides/gs/rest-service/)
+* [Serving Web Content with Spring MVC](https://spring.io/guides/gs/serving-web-content/)
+* [Building REST services with Spring](https://spring.io/guides/tutorials/bookmarks/)
+* [Accessing data with MySQL](https://spring.io/guides/gs/accessing-data-mysql/)
+

db.sql

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+DROP TABLE IF EXISTS `t_id_segment_cfg`;
+CREATE TABLE `t_id_segment_cfg` (
+  `id`           bigint(20)   NOT NULL AUTO_INCREMENT
+  COMMENT '主键',
+  `biz_tag`      varchar(64)  NOT NULL
+  COMMENT '业务标识',
+  `start_id`     bigint(20)   NOT NULL DEFAULT '1'
+  COMMENT '起始id',
+  `step`         int(11)      NOT NULL
+  COMMENT '步长',
+  `version`      bigint(20)   NOT NULL DEFAULT '0'
+  COMMENT '版本号',
+  `description`  varchar(128) NOT NULL
+  COMMENT '描述',
+  `created_time` datetime              DEFAULT CURRENT_TIMESTAMP
+  COMMENT '创建时间',
+  `updated_time` datetime              DEFAULT CURRENT_TIMESTAMP
+  ON UPDATE CURRENT_TIMESTAMP
+  COMMENT '更新时间',
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `uk_biz_tag` (`biz_tag`) USING BTREE
+)
+  ENGINE = InnoDB
+  DEFAULT CHARSET = utf8
+  COLLATE = utf8_bin
+  COMMENT ='ID号段配置表';
+
+INSERT INTO `t_id_segment_cfg` (`biz_tag`, `start_id`, `step`, `description`) VALUES ('short_url', 1, 100000, '短链');
+
+
+DROP TABLE IF EXISTS `t_url_mapping`;
+CREATE TABLE `t_url_mapping` (
+  `id`             bigint(20)   NOT NULL AUTO_INCREMENT
+  COMMENT '主键',
+  `keyword`        varchar(64)  NOT NULL
+  COMMENT '唯一标识',
+  `biz_type`       varchar(32)  NOT NULL
+  COMMENT '业务标识',
+  `origin_url`     varchar(256) NOT NULL
+  COMMENT '原始url',
+  `origin_url_md5` varchar(64)  NOT NULL
+  COMMENT '原始urlMd5',
+  `description`    varchar(128) NOT NULL
+  COMMENT '描述',
+  `creator`        varchar(64)  NOT NULL
+  COMMENT '创建者',
+  `created_time`   datetime              DEFAULT CURRENT_TIMESTAMP
+  COMMENT '创建时间',
+  `updated_time`   datetime              DEFAULT CURRENT_TIMESTAMP
+  ON UPDATE CURRENT_TIMESTAMP
+  COMMENT '更新时间',
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `uk_keyword` (`keyword`) USING BTREE,
+  KEY `idx_origin_url_md5`(`origin_url_md5`) USING BTREE,
+  KEY `idx_biz_type_keyword_md5`(`biz_type`, `keyword`,`origin_url_md5`) USING BTREE
+
+)
+  ENGINE = InnoDB
+  DEFAULT CHARSET = utf8
+  COLLATE = utf8_bin
+  COMMENT ='url映射表';
+

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
+         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>
+    <groupId>com.blues</groupId>
+    <artifactId>shorturl</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>short-url</name>
+    <packaging>jar</packaging>
+    <description>Demo project for Spring Boot</description>
+
+    <properties>
+        <java.version>1.8</java.version>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <spring-boot.version>2.3.0.RELEASE</spring-boot.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-devtools</artifactId>
+            <scope>runtime</scope>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mybatis.spring.boot</groupId>
+            <artifactId>mybatis-spring-boot-starter</artifactId>
+            <version>1.3.3</version>
+        </dependency>
+        <!-- 分页插件 -->
+        <dependency>
+            <groupId>com.github.pagehelper</groupId>
+            <artifactId>pagehelper-spring-boot-starter</artifactId>
+            <version>1.3.0</version>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>fastjson</artifactId>
+            <version>1.2.46</version>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+        </dependency>
+    </dependencies>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-dependencies</artifactId>
+                <version>${spring-boot.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <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>
+                <version>2.3.0.RELEASE</version>
+                <configuration>
+                    <mainClass>com.blues.shorturl.ShorturlApplication</mainClass>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>repackage</id>
+                        <goals>
+                            <goal>repackage</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

src/main/java/com/blues/shorturl/ShorturlApplication.java

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+package com.blues.shorturl;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ShorturlApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(ShorturlApplication.class, args);
+    }
+
+}

src/main/java/com/blues/shorturl/common/Constants.java

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+package com.blues.shorturl.common;
+
+public class Constants {
+    /**
+     * 重试次数
+     */
+    public static final int RETRY = 3;
+    /**
+     * 预加载下个号段的百分比
+     */
+    public static final int LOADING_THRESHOLD = 50;
+
+    private Constants() {
+    }
+
+}

src/main/java/com/blues/shorturl/dao/IdSegmentCfgMapper.java

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+package com.blues.shorturl.dao;
+
+import com.blues.shorturl.entity.IdSegmentCfg;
+import org.apache.ibatis.annotations.Mapper;
+
+@Mapper
+public interface IdSegmentCfgMapper {
+    int insert(IdSegmentCfg record);
+
+    IdSegmentCfg selectByBizTag(String bizTag);
+
+    int updateByBizTag(IdSegmentCfg record);
+}

src/main/java/com/blues/shorturl/dao/UrlMappingMapper.java

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+package com.blues.shorturl.dao;
+
+import com.blues.shorturl.entity.UrlMapping;
+import org.apache.ibatis.annotations.Mapper;
+
+import java.util.List;
+
+@Mapper
+public interface UrlMappingMapper {
+    int deleteByPrimaryKey(Long id);
+
+    int insert(UrlMapping record);
+
+    int insertSelective(UrlMapping record);
+
+    UrlMapping selectByPrimaryKey(Long id);
+
+    UrlMapping selectByMd5(String md5);
+
+    UrlMapping selectByKeyword(String keyword);
+
+    List<UrlMapping> selectByCondition(UrlMapping record);
+
+    List<UrlMapping> selectByBizType(List<String> types);
+
+    int updateByPrimaryKeySelective(UrlMapping record);
+
+    int updateByPrimaryKey(UrlMapping record);
+}

src/main/java/com/blues/shorturl/entity/IdSegment.java

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+package com.blues.shorturl.entity;
+
+import lombok.Data;
+
+import java.io.Serializable;
+import java.util.concurrent.atomic.AtomicLong;
+
+@Data
+public class IdSegment implements Serializable {
+    private Long startId;
+    private Long midId;
+    private Long endId;
+    private AtomicLong currentId;
+}

src/main/java/com/blues/shorturl/entity/IdSegmentCfg.java

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+package com.blues.shorturl.entity;
+
+import lombok.Data;
+
+import java.io.Serializable;
+import java.util.Date;
+
+@Data
+public class IdSegmentCfg implements Serializable {
+    private Long id;
+    private String bizTag;
+    private Long startId;
+    private Integer step;
+    private String description;
+    private Long version;
+    private Date createdTime;
+    private Date updatedTime;
+}

src/main/java/com/blues/shorturl/entity/UrlMapping.java

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+package com.blues.shorturl.entity;
+
+import lombok.Data;
+
+import java.io.Serializable;
+import java.util.Date;
+
+/**
+ * t_url_mapping
+ *
+ * @author
+ */
+@Data
+public class UrlMapping implements Serializable {
+    private static final long serialVersionUID = 1L;
+    /**
+     * 主键
+     */
+    private Long id;
+    /**
+     * 唯一标识
+     */
+    private String keyword;
+    /**
+     * 业务标识
+     */
+    private String bizType;
+    /**
+     * 原始url
+     */
+    private String originUrl;
+    /**
+     * 原始urlMd5
+     */
+    private String originUrlMd5;
+    /**
+     * 描述
+     */
+    private String description;
+    /**
+     * 创建者
+     */
+    private String creator;
+    /**
+     * 创建时间
+     */
+    private Date createdTime;
+    /**
+     * 更新时间
+     */
+    private Date updatedTime;
+}