• 四、Springboot+jpa+mycat应用


    一、后台配置文件

        # 连接地址
        url: jdbc:mysql://127.0.0.1:8066/CHUNK?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT%2B8&rewriteBatchedStatements=true
        # 用户名
        username: root
        # 密码
        password: bluetooth@wy2019

    8066:mycat默认端口

    root:mycat配置文件设置、

    password:mycat配置文件配置

    二、mycat配置

    2.1 schema.xml配置

    <?xml version="1.0"?>
    <!DOCTYPE mycat:schema SYSTEM "schema.dtd">
    <mycat:schema xmlns:mycat="http://io.mycat/">
    
        <!-- <schema>:表示的是在mycat中的逻辑库配置,逻辑库名称为:CHUNK -->  
        <schema name="CHUNK" checkSQLschema="false" sqlMaxLimit="10000">
            <!-- <table>:表示在mycat中的逻辑表配置,逻辑表名称为:cn_chunk,映射到两个数据库节点dataNode中,设置几个几点代表要分片几个库,切分规则为:rule1(在rule.xml配置) -->  
            <table name="cn_chunk" primaryKey="id" autoIncrement="true" dataNode="dn01,dn02,dn03" rule="rule1">
            <childTable name="cn_chunk_lockset" primaryKey="id" joinKey="chunkId" parentKey="id" /></table>
        </schema>
        
        <!-- 设置dataNode 对应的数据库,及 mycat 连接的地址dataHost -->  
        <!-- <dataNode>:表示数据库节点,这个节点不一定是单节点,可以配置成读写分离. -->  
        <!-- <dataHost>:真实的数据库的地址配置.在下面进行配置 -->  
        <!-- <heartbeat>:用户心跳检测 -->  
        <!-- <writeHost>:写库的配置 -->  
        <dataNode name="dn01" dataHost="localhost" database="chunk001" />
        <dataNode name="dn02" dataHost="localhost" database="chunk002" />
        <dataNode name="dn03" dataHost="localhost" database="chunk003" />
        
        <!-- mycat 逻辑主机dataHost对应的物理主机.其中也设置对应的mysql登陆信息 -->  
        <dataHost name="localhost" maxCon="1000" minCon="10" balance="0" writeType="0" dbType="mysql" dbDriver="native">  
            <heartbeat>select user()</heartbeat>  
            <!-- 连接到本地数据库服务的配置 --> 
            <writeHost host="server1" url="127.0.0.1:3306" user="root" password="root"/>  
        </dataHost> 
    </mycat:schema>

    2.2 rule.xml配置

    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE mycat:rule SYSTEM "rule.dtd">
    <mycat:rule xmlns:mycat="http://io.mycat/">
    
        <tableRule name="rule1">
            <rule>
                 <!-- 是按照id列进行切分,切分规则是采取取模的方式, -->
                <columns>id</columns>
                <algorithm>mod-long</algorithm>
            </rule>
        </tableRule>
        
        <function name="mod-long" class="io.mycat.route.function.PartitionByMod">
            <!-- <property name="count">2</property>:这里配置了我们有拆分了多个库(表),需要和前面配置
            <table name="user" primaryKey="id" dataNode="dn01,dn02,dn03" rule="rule1" />
            中的dataNode个数一致,否则会出错. -->
            <property name="count">3</property>
        </function>
        
        
    </mycat:rule>

    2.3 server.xml配置

    <?xml version="1.0" encoding="UTF-8"?>
    <!-- - - Licensed under the Apache License, Version 2.0 (the "License"); 
        - you may not use this file except in compliance with the License. - You 
        may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 
        - - Unless required by applicable law or agreed to in writing, software - 
        distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT 
        WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the 
        License for the specific language governing permissions and - limitations 
        under the License. -->
    <!DOCTYPE mycat:server SYSTEM "server.dtd">
    <mycat:server xmlns:mycat="http://io.mycat/">
        <system>
        <property name="useSqlStat">0</property>  <!-- 1为开启实时统计、0为关闭 -->
        <property name="useGlobleTableCheck">0</property>  <!-- 1为开启全加班一致性检测、0为关闭 -->
            <property name="sequnceHandlerType">1</property>
            <!-- <property name="sequnceHandlerType">2</property>-->
          <!--  <property name="useCompression">1</property>--> <!--1为开启mysql压缩协议-->
            <!--  <property name="fakeMySQLVersion">5.6.20</property>--> <!--设置模拟的MySQL版本号-->
        <!-- <property name="processorBufferChunk">40960</property> -->
        <!-- 
        <property name="processors">1</property> 
        <property name="processorExecutor">32</property> 
         -->
            <!--默认为type 0: DirectByteBufferPool | type 1 ByteBufferArena-->
            <property name="processorBufferPoolType">0</property>
            <!--默认是65535 64K 用于sql解析时最大文本长度 -->
            <!--<property name="maxStringLiteralLength">65535</property>-->
            <!--<property name="sequnceHandlerType">0</property>-->
            <!--<property name="backSocketNoDelay">1</property>-->
            <!--<property name="frontSocketNoDelay">1</property>-->
            <!--<property name="processorExecutor">16</property>-->
            <!--
                <property name="serverPort">8066</property> <property name="managerPort">9066</property> 
                <property name="idleTimeout">300000</property> <property name="bindIp">0.0.0.0</property> 
                <property name="frontWriteQueueSize">4096</property> <property name="processors">32</property> -->
            <!--分布式事务开关,0为不过滤分布式事务,1为过滤分布式事务(如果分布式事务内只涉及全局表,则不过滤),2为不过滤分布式事务,但是记录分布式事务日志-->
            <property name="handleDistributedTransactions">0</property>
            
                <!--
                off heap for merge/order/group/limit      1开启   0关闭
            -->
            <property name="useOffHeapForMerge">1</property>
    
            <!--
                单位为m
            -->
            <property name="memoryPageSize">1m</property>
    
            <!--
                单位为k
            -->
            <property name="spillsFileBufferSize">1k</property>
    
            <property name="useStreamOutput">0</property>
    
            <!--
                单位为m
            -->
            <property name="systemReserveMemorySize">384m</property>
    
    
            <!--是否采用zookeeper协调切换  -->
            <property name="useZKSwitch">true</property>
    
    
        </system>
        
        <!-- 全局SQL防火墙设置 -->
        <!-- 
        <firewall> 
           <whitehost>
              <host host="127.0.0.1" user="mycat"/>
              <host host="127.0.0.2" user="mycat"/>
           </whitehost>
           <blacklist check="false">
           </blacklist>
        </firewall>
        -->
        
        <user name="root">
            <!-- java项目配置文件连接的密码 -->
            <property name="password">bluetooth@wy2019</property>
            <!-- schema.xml下的逻辑库,要一致 -->
            <property name="schemas">CHUNK</property>
            
            <!-- 表级 DML 权限设置 -->
            <!--         
            <privileges check="false">
                <schema name="TESTDB" dml="0110" >
                    <table name="tb01" dml="0000"></table>
                    <table name="tb02" dml="1111"></table>
                </schema>
            </privileges>        
             -->
        </user>
    
        <user name="user">
            <property name="password">user</property>
            <!-- schema.xml下的逻辑库,要一致 -->
            <property name="schemas">CHUNK</property>
            <property name="readOnly">true</property>
        </user>
    
    </mycat:server>

    2.4 sequence_db_conf.properties配置

    #sequence stored in datanode
    GLOBAL=dn1
    COMPANY=dn1
    CUSTOMER=dn1
    ORDERS=dn1
    #逻辑库的分片函数在对应个库下
    CN_CHUNK=dn01

    三、建表语句

    #创建表语句区块与子表区块锁
    #添加表 区块
    DROP TABLE IF EXISTS `cn_chunk`;
    CREATE TABLE `cn_chunk` (
      `id` bigint(20) NOT NULL AUTO_INCREMENT,
      `createdAt` datetime DEFAULT NULL COMMENT '创建时间',
      `modifiedAt` datetime DEFAULT NULL COMMENT '更新时间',
      `createdBy` varchar(36) DEFAULT NULL COMMENT '创建人',
      `modifiedBy` varchar(36) DEFAULT NULL COMMENT '更新人',
      `version` int(11) DEFAULT NULL COMMENT '版本号',
      `isDelete` int(11) DEFAULT NULL COMMENT '是否删除',
      `keyInfoId` varchar(36) DEFAULT NULL COMMENT '钥匙id',
      `chunkOne` int(11) DEFAULT NULL COMMENT '区块1',
      `chunkTwo` int(11) DEFAULT NULL COMMENT '区块2',
      `chunkThree` int(11) DEFAULT NULL COMMENT '区块3',
      `chunkFour` int(11) DEFAULT NULL COMMENT '区块4',
      `chunkFive` int(11) DEFAULT NULL COMMENT '区块5',
      `chunkSix` int(11) DEFAULT NULL COMMENT '区块6',
      `chunkSeven` int(11) DEFAULT NULL COMMENT '区块7',
      `chunkEight` int(11) DEFAULT NULL COMMENT '区块8',
      PRIMARY KEY (`id`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
    
    #添加表 区块锁
    DROP TABLE IF EXISTS `cn_chunk_lockset`;
    CREATE TABLE `cn_chunk_lockset` (
      `id` varchar(36) NOT NULL,
      `createdAt` datetime DEFAULT NULL COMMENT '创建时间',
      `modifiedAt` datetime DEFAULT NULL COMMENT '更新时间',
      `createdBy` varchar(36) DEFAULT NULL COMMENT '创建人',
      `modifiedBy` varchar(36) DEFAULT NULL COMMENT '更新人',
      `version` int(11) DEFAULT NULL COMMENT '版本号',
      `isDelete` int(11) DEFAULT NULL COMMENT '是否删除',
      `taskId` varchar(36) DEFAULT NULL COMMENT '任务id',
      `keyInfoId` varchar(36) DEFAULT NULL COMMENT '钥匙id',
      `startTime` datetime DEFAULT NULL COMMENT '起始时间',
      `endTime` datetime DEFAULT NULL COMMENT '截止时间',
      `chunkLocation` int(11) DEFAULT NULL COMMENT '对应区块(1-8)',
      `lockSetId` varchar(36) DEFAULT NULL COMMENT '锁具信息id',
      `lockId` varchar(50) DEFAULT NULL COMMENT '锁具Id',
      `lockSetName` varchar(50) DEFAULT NULL COMMENT '锁具名称',
      `principalId` varchar(36) DEFAULT NULL COMMENT '执行人id',
      `lockIdDecimal` int(11) DEFAULT NULL COMMENT '锁具Id十进制',
      `chunkId` bigint(20) DEFAULT NULL COMMENT '区块id',
      `thisUpdate` int(11) DEFAULT NULL COMMENT '本次更新(0:否,1:是)',
      `sequence` int(11) DEFAULT NULL COMMENT '区块锁序列号',
      PRIMARY KEY (`id`),
      KEY `fk_cn_chunk_lockset_cn_chunk` (`chunkId`),
      CONSTRAINT `cn_chunk_lockset_ibfk_1` FOREIGN KEY (`chunkId`) REFERENCES `cn_chunk` (`id`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;

    四、对应实体类

    @Getter
    @Setter
    @Entity
    @Table(name = "cn_chunk")
    public class Chunk extends ChunkBaseEntity {
    
        /** 钥匙id*/
        @ApiModelProperty(value = "钥匙id")
        private String keyInfoId;
    
        /** 区块1*/
        @ApiModelProperty(value = "区块1")
        private Integer chunkOne = 0;
    
        /** 区块2*/
        @ApiModelProperty(value = "区块2")
        private Integer chunkTwo = 0;
    
        /** 区块3*/
        @ApiModelProperty(value = "区块3")
        private Integer chunkThree = 0;
    
        /** 区块4*/
        @ApiModelProperty(value = "区块4")
        private Integer chunkFour = 0;
    
        /** 区块5*/
        @ApiModelProperty(value = "区块5")
        private Integer chunkFive = 0;
    
        /** 区块6*/
        @ApiModelProperty(value = "区块6")
        private Integer chunkSix = 0;
    
        /** 区块7*/
        @ApiModelProperty(value = "区块7")
        private Integer chunkSeven = 0;
    
        /** 区块8*/
        @ApiModelProperty(value = "区块8")
        private Integer chunkEight = 0;
    
    }
    @Getter
    @Setter
    @Entity
    @Table(name = "cn_chunk_lockset")
    public class ChunkLockSet extends BaseEntity {
    
        /** 任务id*/
        @ApiModelProperty(value = "任务id")
        @Column(length = 36)
        private String taskId;
    
        /** 钥匙id*/
        @ApiModelProperty(value = "钥匙id")
        private String keyInfoId;
    
        /** 起始时间*/
        @ApiModelProperty(value = "起始时间")
        private LocalDateTime startTime;
    
        /** 截止时间*/
        @ApiModelProperty(value = "截止时间")
        private LocalDateTime endTime;
    
        /** 区块*/
        @ApiModelProperty(value = "区块")
        @ManyToOne
        @JoinColumn(name = "chunkId", updatable = false, insertable = false)
        @JsonIgnore
        private Chunk chunk;
    
        /** 区块id*/
        @ApiModelProperty(value = "区块id")
        @Column(name = "chunkId", updatable = false, length = 36)
        private Long chunkId;
    
        /** 对应区块(1-8)*/
        @ApiModelProperty(value = "对应区块(1-8)")
        private Integer chunkLocation;
    
        /** 锁具信息id*/
        @ApiModelProperty(value = "锁具信息id")
        @Column(name = "lockSetId", length = 36)
        private String lockSetId;
    
        /** 锁具Id*/
        @ApiModelProperty(value = "锁具Id")
        @Column(length = 50)
        private String lockId;
    
        /** 锁具Id十进制*/
        @ApiModelProperty(value = "锁具Id十进制")
        private Integer lockIdDecimal;
    
        /** 锁具名称*/
        @ApiModelProperty(value = "锁具名称")
        @Column(length = 50)
        private String lockSetName;
    
        /** 执行人id*/
        @ApiModelProperty(value = "执行人id")
        @Column(name = "principalId", length = 36)
        private String principalId;
    
        /** 是否已上传(0:否,1:是)*/
        @ApiModelProperty(value = "是否已上传(0:否,1:是)")
        private Integer thisUpdate = BooleanEnum.FALSE.ordinal();
    
        /** 区块锁序列号*/
        @ApiModelProperty(value = "区块锁序列号")
        private Integer sequence;
    
    }
    @Getter
    @Setter
    @MappedSuperclass
    @EntityListeners(AuditingEntityListener.class)
    @Slf4j
    public abstract class ChunkBaseEntity implements Serializable {
    
        /**
         * 主键id
         * GenericGenerator 注解 strategy 参数设置参考如下
         * @see org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory
         * 参考网站:https://blog.csdn.net/mafian/article/details/53968878
         */
        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        @Column(name = "id", updatable = false)
        @ApiModelProperty(value = "主键id", position = 1)
        private Long id;
    
        /** 创建时间*/
        @CreatedDate
        @ApiModelProperty(value = "创建时间", position = 2)
        @JsonFormat
        @DateTimeFormat
        private LocalDateTime createdAt;
    
        /** 更新时间*/
        @LastModifiedDate
        @ApiModelProperty(value = "更新时间", position = 3)
        @JsonFormat
        @DateTimeFormat
        private LocalDateTime modifiedAt;
    
        /** 创建人*/
        @Column(length = 36)
        @CreatedBy
        @ApiModelProperty(value = "创建人", position = 4)
        private String createdBy;
    
        /** 更新人*/
        @Column(length = 36)
        @LastModifiedBy
        @ApiModelProperty(value = "更新人", position = 5)
        private String modifiedBy;
    
        /** 版本(乐观锁)*/
        @Version
        @ApiModelProperty(value = "版本(乐观锁)", position = 6)
        private Integer version;
    
        /** 逻辑删除*/
        @ApiModelProperty(value = "逻辑删除", position = 7)
        private Integer isDelete = BooleanEnum.FALSE.ordinal();
    
    }

    五、mycat分片函数

    配置文件:sequence_db_conf.properties
    设置节点:CN_CHUNK=dn01

    该参数设置在哪个节点,则就在对应的数据库内执行

    #函数自增  实现新增数据自增长以1开始
    #添加表
    DROP TABLE IF EXISTS MYCAT_SEQUENCE;
    CREATE TABLE MYCAT_SEQUENCE (
    NAME VARCHAR (50) NOT NULL,
    current_value INT NOT NULL,
    increment INT NOT NULL DEFAULT 100,
    PRIMARY KEY (NAME)
    ) ENGINE = INNODB ;
    
    
    INSERT INTO MYCAT_SEQUENCE(name,current_value,increment) VALUES ('GLOBAL', 10000000, 100);
    
    DROP FUNCTION IF EXISTS `mycat_seq_currval`;
    DELIMITER ;;
    CREATE FUNCTION `mycat_seq_currval`(seq_name VARCHAR(50))
    RETURNS varchar(64) CHARSET utf8
        DETERMINISTIC
    BEGIN DECLARE retval VARCHAR(64);
            SET retval="-999999999,null";
            SELECT concat(CAST(current_value AS CHAR),",",CAST(increment AS CHAR) ) INTO retval
              FROM MYCAT_SEQUENCE WHERE name = seq_name;
            RETURN retval ;
    END
    ;;
    DELIMITER ;
    
    DROP FUNCTION IF EXISTS `mycat_seq_nextval`;
    DELIMITER ;;
    CREATE FUNCTION `mycat_seq_nextval`(seq_name VARCHAR(50)) RETURNS varchar(64)
     CHARSET utf8
        DETERMINISTIC
    BEGIN UPDATE MYCAT_SEQUENCE
                     SET current_value = current_value + increment
                      WHERE name = seq_name;
             RETURN mycat_seq_currval(seq_name);
    END
    ;;
    DELIMITER ;
    
    
    DROP FUNCTION IF EXISTS `mycat_seq_setval`;
    DELIMITER ;;
    CREATE FUNCTION `mycat_seq_setval`(seq_name VARCHAR(50), value INTEGER)
    RETURNS varchar(64) CHARSET utf8
        DETERMINISTIC
    BEGIN UPDATE MYCAT_SEQUENCE
                       SET current_value = value
                       WHERE name = seq_name;
             RETURN mycat_seq_currval(seq_name);
    END
    ;;
    DELIMITER ;
    
    
    
    
    #插入一条数据,这条数据是我们这个表所需要的。
    #必须是大写的字符,不然就会报错
    #插入需要自增张的表的策略
    #其中cn_chunk代表哪张表实现自增
    insert into  MYCAT_SEQUENCE (name,current_value,increment) values ('cn_chunk',0,1);

    六、关闭默认事务

    import org.springframework.context.annotation.Configuration;
    import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
    
    /**
     * 关闭jpamor默认事务
     * @author lixin.shao
     */
    @EnableJpaRepositories(basePackages = "com.hs.lock.bluetooth.chunk", enableDefaultTransactions = false)
    @Configuration
    public class JpaTransactionConfig {
    }
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  • 原文地址:https://www.cnblogs.com/shaolixin/p/11484103.html
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