四、Springboot+jpa+mycat應用

一、后台配置文件

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

8066：mycat默認端口

root：mycat配置文件設置、

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中的邏輯庫配置，邏輯庫名稱為:CHUNK -->  
    <schema name="CHUNK" checkSQLschema="false" sqlMaxLimit="10000">
        <!-- <table>:表示在mycat中的邏輯表配置，邏輯表名稱為:cn_chunk,映射到兩個數據庫節點dataNode中,設置幾個幾點代表要分片幾個庫,切分規則為: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>
    
    <!-- 設置dataNode 對應的數據庫,及 mycat 連接的地址dataHost -->  
    <!-- <dataNode>:表示數據庫節點,這個節點不一定是單節點，可以配置成讀寫分離. -->  
    <!-- <dataHost>:真實的數據庫的地址配置.在下面進行配置 -->  
    <!-- <heartbeat>:用戶心跳檢測 -->  
    <!-- <writeHost>:寫庫的配置 -->  
    <dataNode name="dn01" dataHost="localhost" database="chunk001" />
    <dataNode name="dn02" dataHost="localhost" database="chunk002" />
    <dataNode name="dn03" dataHost="localhost" database="chunk003" />
    
    <!-- mycat 邏輯主機dataHost對應的物理主機.其中也設置對應的mysql登陸信息 -->  
    <dataHost name="localhost" maxCon="1000" minCon="10" balance="0" writeType="0" dbType="mysql" dbDriver="native">  
        <heartbeat>select user()</heartbeat>  
        <!-- 連接到本地數據庫服務的配置 --> 
        <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列進行切分，切分規則是采取取模的方式, -->
            <columns>id</columns>
            <algorithm>mod-long</algorithm>
        </rule>
    </tableRule>
    
    <function name="mod-long" class="io.mycat.route.function.PartitionByMod">
        <!-- <property name="count">2</property>:這里配置了我們有拆分了多個庫(表)，需要和前面配置
        <table name="user" primaryKey="id" dataNode="dn01,dn02,dn03" rule="rule1" />
        中的dataNode個數一致，否則會出錯. -->
        <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為開啟實時統計、0為關閉 -->
    <property name="useGlobleTableCheck">0</property>  <!-- 1為開啟全加班一致性檢測、0為關閉 -->
        <property name="sequnceHandlerType">1</property>
        <!-- <property name="sequnceHandlerType">2</property>-->
      <!--  <property name="useCompression">1</property>--> <!--1為開啟mysql壓縮協議-->
        <!--  <property name="fakeMySQLVersion">5.6.20</property>--> <!--設置模擬的MySQL版本號-->
    <!-- <property name="processorBufferChunk">40960</property> -->
    <!-- 
    <property name="processors">1</property> 
    <property name="processorExecutor">32</property> 
     -->
        <!--默認為type 0: DirectByteBufferPool | type 1 ByteBufferArena-->
        <property name="processorBufferPoolType">0</property>
        <!--默認是65535 64K 用於sql解析時最大文本長度 -->
        <!--<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> -->
        <!--分布式事務開關，0為不過濾分布式事務，1為過濾分布式事務（如果分布式事務內只涉及全局表，則不過濾），2為不過濾分布式事務,但是記錄分布式事務日志-->
        <property name="handleDistributedTransactions">0</property>
        
            <!--
            off heap for merge/order/group/limit      1開啟   0關閉
        -->
        <property name="useOffHeapForMerge">1</property>

        <!--
            單位為m
        -->
        <property name="memoryPageSize">1m</property>

        <!--
            單位為k
        -->
        <property name="spillsFileBufferSize">1k</property>

        <property name="useStreamOutput">0</property>

        <!--
            單位為m
        -->
        <property name="systemReserveMemorySize">384m</property>


        <!--是否采用zookeeper協調切換  -->
        <property name="useZKSwitch">true</property>


    </system>
    
    <!-- 全局SQL防火牆設置 -->
    <!-- 
    <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項目配置文件連接的密碼 -->
        <property name="password">bluetooth@wy2019</property>
        <!-- schema.xml下的邏輯庫，要一致 -->
        <property name="schemas">CHUNK</property>
        
        <!-- 表級 DML 權限設置 -->
        <!--         
        <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下的邏輯庫，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
#邏輯庫的分片函數在對應個庫下
CN_CHUNK=dn01

三、建表語句

#創建表語句區塊與子表區塊鎖
#添加表 區塊
DROP TABLE IF EXISTS `cn_chunk`;
CREATE TABLE `cn_chunk` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `createdAt` datetime DEFAULT NULL COMMENT '創建時間',
  `modifiedAt` datetime DEFAULT NULL COMMENT '更新時間',
  `createdBy` varchar(36) DEFAULT NULL COMMENT '創建人',
  `modifiedBy` varchar(36) DEFAULT NULL COMMENT '更新人',
  `version` int(11) DEFAULT NULL COMMENT '版本號',
  `isDelete` int(11) DEFAULT NULL COMMENT '是否刪除',
  `keyInfoId` varchar(36) DEFAULT NULL COMMENT '鑰匙id',
  `chunkOne` int(11) DEFAULT NULL COMMENT '區塊1',
  `chunkTwo` int(11) DEFAULT NULL COMMENT '區塊2',
  `chunkThree` int(11) DEFAULT NULL COMMENT '區塊3',
  `chunkFour` int(11) DEFAULT NULL COMMENT '區塊4',
  `chunkFive` int(11) DEFAULT NULL COMMENT '區塊5',
  `chunkSix` int(11) DEFAULT NULL COMMENT '區塊6',
  `chunkSeven` int(11) DEFAULT NULL COMMENT '區塊7',
  `chunkEight` int(11) DEFAULT NULL COMMENT '區塊8',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

#添加表 區塊鎖
DROP TABLE IF EXISTS `cn_chunk_lockset`;
CREATE TABLE `cn_chunk_lockset` (
  `id` varchar(36) NOT NULL,
  `createdAt` datetime DEFAULT NULL COMMENT '創建時間',
  `modifiedAt` datetime DEFAULT NULL COMMENT '更新時間',
  `createdBy` varchar(36) DEFAULT NULL COMMENT '創建人',
  `modifiedBy` varchar(36) DEFAULT NULL COMMENT '更新人',
  `version` int(11) DEFAULT NULL COMMENT '版本號',
  `isDelete` int(11) DEFAULT NULL COMMENT '是否刪除',
  `taskId` varchar(36) DEFAULT NULL COMMENT '任務id',
  `keyInfoId` varchar(36) DEFAULT NULL COMMENT '鑰匙id',
  `startTime` datetime DEFAULT NULL COMMENT '起始時間',
  `endTime` datetime DEFAULT NULL COMMENT '截止時間',
  `chunkLocation` int(11) DEFAULT NULL COMMENT '對應區塊(1-8)',
  `lockSetId` varchar(36) DEFAULT NULL COMMENT '鎖具信息id',
  `lockId` varchar(50) DEFAULT NULL COMMENT '鎖具Id',
  `lockSetName` varchar(50) DEFAULT NULL COMMENT '鎖具名稱',
  `principalId` varchar(36) DEFAULT NULL COMMENT '執行人id',
  `lockIdDecimal` int(11) DEFAULT NULL COMMENT '鎖具Id十進制',
  `chunkId` bigint(20) DEFAULT NULL COMMENT '區塊id',
  `thisUpdate` int(11) DEFAULT NULL COMMENT '本次更新（0：否，1：是）',
  `sequence` int(11) DEFAULT NULL COMMENT '區塊鎖序列號',
  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、對應實體類

@Getter
@Setter
@Entity
@Table(name = "cn_chunk")
public class Chunk extends ChunkBaseEntity {

    /** 鑰匙id*/
    @ApiModelProperty(value = "鑰匙id")
    private String keyInfoId;

    /** 區塊1*/
    @ApiModelProperty(value = "區塊1")
    private Integer chunkOne = 0;

    /** 區塊2*/
    @ApiModelProperty(value = "區塊2")
    private Integer chunkTwo = 0;

    /** 區塊3*/
    @ApiModelProperty(value = "區塊3")
    private Integer chunkThree = 0;

    /** 區塊4*/
    @ApiModelProperty(value = "區塊4")
    private Integer chunkFour = 0;

    /** 區塊5*/
    @ApiModelProperty(value = "區塊5")
    private Integer chunkFive = 0;

    /** 區塊6*/
    @ApiModelProperty(value = "區塊6")
    private Integer chunkSix = 0;

    /** 區塊7*/
    @ApiModelProperty(value = "區塊7")
    private Integer chunkSeven = 0;

    /** 區塊8*/
    @ApiModelProperty(value = "區塊8")
    private Integer chunkEight = 0;

}

@Getter
@Setter
@Entity
@Table(name = "cn_chunk_lockset")
public class ChunkLockSet extends BaseEntity {

    /** 任務id*/
    @ApiModelProperty(value = "任務id")
    @Column(length = 36)
    private String taskId;

    /** 鑰匙id*/
    @ApiModelProperty(value = "鑰匙id")
    private String keyInfoId;

    /** 起始時間*/
    @ApiModelProperty(value = "起始時間")
    private LocalDateTime startTime;

    /** 截止時間*/
    @ApiModelProperty(value = "截止時間")
    private LocalDateTime endTime;

    /** 區塊*/
    @ApiModelProperty(value = "區塊")
    @ManyToOne
    @JoinColumn(name = "chunkId", updatable = false, insertable = false)
    @JsonIgnore
    private Chunk chunk;

    /** 區塊id*/
    @ApiModelProperty(value = "區塊id")
    @Column(name = "chunkId", updatable = false, length = 36)
    private Long chunkId;

    /** 對應區塊(1-8)*/
    @ApiModelProperty(value = "對應區塊(1-8)")
    private Integer chunkLocation;

    /** 鎖具信息id*/
    @ApiModelProperty(value = "鎖具信息id")
    @Column(name = "lockSetId", length = 36)
    private String lockSetId;

    /** 鎖具Id*/
    @ApiModelProperty(value = "鎖具Id")
    @Column(length = 50)
    private String lockId;

    /** 鎖具Id十進制*/
    @ApiModelProperty(value = "鎖具Id十進制")
    private Integer lockIdDecimal;

    /** 鎖具名稱*/
    @ApiModelProperty(value = "鎖具名稱")
    @Column(length = 50)
    private String lockSetName;

    /** 執行人id*/
    @ApiModelProperty(value = "執行人id")
    @Column(name = "principalId", length = 36)
    private String principalId;

    /** 是否已上傳（0：否，1：是）*/
    @ApiModelProperty(value = "是否已上傳（0：否，1：是）")
    private Integer thisUpdate = BooleanEnum.FALSE.ordinal();

    /** 區塊鎖序列號*/
    @ApiModelProperty(value = "區塊鎖序列號")
    private Integer sequence;

}

@Getter
@Setter
@MappedSuperclass
@EntityListeners(AuditingEntityListener.class)
@Slf4j
public abstract class ChunkBaseEntity implements Serializable {

    /**
     * 主鍵id
     * GenericGenerator 注解 strategy 參數設置參考如下
     * @see org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory
     * 參考網站：https://blog.csdn.net/mafian/article/details/53968878
     */
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id", updatable = false)
    @ApiModelProperty(value = "主鍵id", position = 1)
    private Long id;

    /** 創建時間*/
    @CreatedDate
    @ApiModelProperty(value = "創建時間", position = 2)
    @JsonFormat
    @DateTimeFormat
    private LocalDateTime createdAt;

    /** 更新時間*/
    @LastModifiedDate
    @ApiModelProperty(value = "更新時間", position = 3)
    @JsonFormat
    @DateTimeFormat
    private LocalDateTime modifiedAt;

    /** 創建人*/
    @Column(length = 36)
    @CreatedBy
    @ApiModelProperty(value = "創建人", position = 4)
    private String createdBy;

    /** 更新人*/
    @Column(length = 36)
    @LastModifiedBy
    @ApiModelProperty(value = "更新人", position = 5)
    private String modifiedBy;

    /** 版本（樂觀鎖）*/
    @Version
    @ApiModelProperty(value = "版本（樂觀鎖）", position = 6)
    private Integer version;

    /** 邏輯刪除*/
    @ApiModelProperty(value = "邏輯刪除", position = 7)
    private Integer isDelete = BooleanEnum.FALSE.ordinal();

}

 

五、mycat分片函數

配置文件：sequence_db_conf.properties
設置節點：CN_CHUNK=dn01

該參數設置在哪個節點，則就在對應的數據庫內執行

#函數自增  實現新增數據自增長以1開始
#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 ;




#插入一條數據，這條數據是我們這個表所需要的。
#必須是大寫的字符，不然就會報錯
#插入需要自增張的表的策略
#其中cn_chunk代表哪張表實現自增
insert into  MYCAT_SEQUENCE (name,current_value,increment) values ('cn_chunk',0,1);

六、關閉默認事務

import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;

/**
 * 關閉jpamor默認事務
 * @author lixin.shao
 */
@EnableJpaRepositories(basePackages = "com.hs.lock.bluetooth.chunk", enableDefaultTransactions = false)
@Configuration
public class JpaTransactionConfig {
}