1、mycat服务
搭建mycat服务并启动，windows安装参照。
系列文章：
[Mycat 简介]
2、相关配置文件
此处我的配置为：
schema.xml
<?xml version="1.0"?> <!DOCTYPE mycat:schema SYSTEM "schema.dtd"> <mycat:schema xmlns:mycat="http://io.mycat/"> <schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100"> <!-- auto sharding by id (long) --> <table name="travelrecord" dataNode="dn1,dn2,dn3" rule="auto-sharding-long" /> <!-- global table is auto cloned to all defined data nodes ,so can join with any table whose sharding node is in the same data node --> <table name="company" primaryKey="ID" type="global" dataNode="dn1,dn2,dn3" /> <table name="goods" primaryKey="ID" type="global" dataNode="dn1,dn2" /> <!-- random sharding using mod sharind rule --> <table name="hotnews" primaryKey="ID" autoIncrement="true" dataNode="dn1,dn2,dn3" rule="mod-long" /> <!-- <table name="dual" primaryKey="ID" dataNode="dnx,dnoracle2" type="global" needAddLimit="false"/> <table name="worker" primaryKey="ID" dataNode="jdbc_dn1,jdbc_dn2,jdbc_dn3" rule="mod-long" /> --> <table name="employee" primaryKey="ID" dataNode="dn1,dn2" rule="sharding-by-intfile" /> <table name="customer" primaryKey="ID" dataNode="dn1,dn2" rule="sharding-by-intfile"> <childTable name="orders" primaryKey="ID" joinKey="customer_id" parentKey="id"> <childTable name="order_items" joinKey="order_id" parentKey="id" /> </childTable> <childTable name="customer_addr" primaryKey="ID" joinKey="customer_id" parentKey="id" /> </table> <!-- <table name="oc_call" primaryKey="ID" dataNode="dn1$0-743" rule="latest-month-calldate" /> --> </schema> <schema name="springboot" checkSQLschema="false" sqlMaxLimit="100"> <!-- auto sharding by id (long) --> <table name="tb_user" dataNode="dn1,dn2,dn3" rule="auto-sharding-long" /> <!-- global table is auto cloned to all defined data nodes ,so can join with any table whose sharding node is in the same data node --> <table name="tb_company" primaryKey="ID" type="global" dataNode="dn1,dn2,dn3" /> </schema> <!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743" /> --> <dataNode name="dn1" dataHost="localhost1" database="db1" /> <dataNode name="dn2" dataHost="localhost1" database="db2" /> <dataNode name="dn3" dataHost="localhost1" database="db3" /> <!--<dataNode name="dn4" dataHost="sequoiadb1" database="SAMPLE" /> <dataNode name="jdbc_dn1" dataHost="jdbchost" database="db1" /> <dataNode name="jdbc_dn2" dataHost="jdbchost" database="db2" /> <dataNode name="jdbc_dn3" dataHost="jdbchost" database="db3" /> --> <dataHost name="localhost1" maxCon="1000" minCon="10" balance="0" writeType="0" dbType="mysql" dbDriver="native" switchType="1" slaveThreshold="100"> <heartbeat>select user()</heartbeat> <!-- can have multi write hosts --> <writeHost host="hostM1" url="localhost:3306" user="root" password="123456"> <!-- can have multi read hosts --> <!-- <readHost host="hostS2" url="192.168.1.200:3306" user="root" password="xxx" /> --> </writeHost> <!-- <writeHost host="hostS1" url="localhost:3316" user="root" password="123456" /> --> <!-- <writeHost host="hostM2" url="localhost:3316" user="root" password="123456"/> --> </dataHost> <!-- <dataHost name="sequoiadb1" maxCon="1000" minCon="1" balance="0" dbType="sequoiadb" dbDriver="jdbc"> <heartbeat> </heartbeat> <writeHost host="hostM1" url="sequoiadb://1426587161.dbaas.sequoialab.net:11920/SAMPLE" user="jifeng" password="jifeng"></writeHost> </dataHost> <dataHost name="oracle1" maxCon="1000" minCon="1" balance="0" writeType="0" dbType="oracle" dbDriver="jdbc"> <heartbeat>select 1 from dual</heartbeat> <connectionInitSql>alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss'</connectionInitSql> <writeHost host="hostM1" url="jdbc:oracle:thin:@127.0.0.1:1521:nange" user="base" password="123456" > </writeHost> </dataHost> <dataHost name="jdbchost" maxCon="1000" minCon="1" balance="0" writeType="0" dbType="mongodb" dbDriver="jdbc"> <heartbeat>select user()</heartbeat> <writeHost host="hostM" url="mongodb://192.168.0.99/test" user="admin" password="123456" ></writeHost> </dataHost> <dataHost name="sparksql" maxCon="1000" minCon="1" balance="0" dbType="spark" dbDriver="jdbc"> <heartbeat> </heartbeat> <writeHost host="hostM1" url="jdbc:hive2://feng01:10000" user="jifeng" password="jifeng"></writeHost> </dataHost> --> <!-- <dataHost name="jdbchost" maxCon="1000" minCon="10" balance="0" dbType="mysql" dbDriver="jdbc"> <heartbeat>select user()</heartbeat> <writeHost host="hostM1" url="jdbc:mysql://localhost:3306" user="root" password="123456"> </writeHost> </dataHost> --> </mycat:schema>
server.xml
<?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="nonePasswordLogin">0</property> <!-- 0为需要密码登陆、1为不需要密码登陆 ,默认为0，设置为1则需要指定默认账户--> <property name="useHandshakeV10">1</property> <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">2</property> <property name="subqueryRelationshipCheck">false</property> <!-- 子查询中存在关联查询的情况下,检查关联字段中是否有分片字段 .默认 false --> <!-- <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 | type 2 NettyBufferPool --> <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">64k</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">false</property> <!-- XA Recovery Log日志路径 --> <!--<property name="XARecoveryLogBaseDir">./</property>--> <!-- XA Recovery Log日志名称 --> <!--<property name="XARecoveryLogBaseName">tmlog</property>--> <!--如果为 true的话 严格遵守隔离级别,不会在仅仅只有select语句的时候在事务中切换连接--> <property name="strictTxIsolation">false</property> <property name="useZKSwitch">true</property> </system> <!-- 全局SQL防火墙设置 --> <!--白名单可以使用通配符%或着*--> <!--例如<host host="127.0.0.*" user="root"/>--> <!--例如<host host="127.0.*" user="root"/>--> <!--例如<host host="127.*" user="root"/>--> <!--例如<host host="1*7.*" user="root"/>--> <!--这些配置情况下对于127.0.0.1都能以root账户登录--> <!-- <firewall> <whitehost> <host host="1*7.0.0.*" user="root"/> </whitehost> <blacklist check="false"> </blacklist> </firewall> --> <user name="root" defaultAccount="true"> <property name="password">123456</property> <property name="schemas">TESTDB,springboot</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> <property name="schemas">TESTDB</property> <property name="readOnly">true</property> </user> </mycat:server>
rule.xml
<?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:rule SYSTEM "rule.dtd"> <mycat:rule xmlns:mycat="http://io.mycat/"> <tableRule name="rule1"> <rule> <columns>id</columns> <algorithm>func1</algorithm> </rule> </tableRule> <tableRule name="rule2"> <rule> <columns>user_id</columns> <algorithm>func1</algorithm> </rule> </tableRule> <tableRule name="sharding-by-intfile"> <rule> <columns>sharding_id</columns> <algorithm>hash-int</algorithm> </rule> </tableRule> <tableRule name="auto-sharding-long"> <rule> <columns>id</columns> <algorithm>rang-long</algorithm> </rule> </tableRule> <tableRule name="mod-long"> <rule> <columns>id</columns> <algorithm>mod-long</algorithm> </rule> </tableRule> <tableRule name="sharding-by-murmur"> <rule> <columns>id</columns> <algorithm>murmur</algorithm> </rule> </tableRule> <tableRule name="crc32slot"> <rule> <columns>id</columns> <algorithm>crc32slot</algorithm> </rule> </tableRule> <tableRule name="sharding-by-month"> <rule> <columns>create_time</columns> <algorithm>partbymonth</algorithm> </rule> </tableRule> <tableRule name="latest-month-calldate"> <rule> <columns>calldate</columns> <algorithm>latestMonth</algorithm> </rule> </tableRule> <tableRule name="auto-sharding-rang-mod"> <rule> <columns>id</columns> <algorithm>rang-mod</algorithm> </rule> </tableRule> <tableRule name="jch"> <rule> <columns>id</columns> <algorithm>jump-consistent-hash</algorithm> </rule> </tableRule> <function name="murmur" class="io.mycat.route.function.PartitionByMurmurHash"> <property name="seed">0</property><!-- 默认是0 --> <property name="count">2</property><!-- 要分片的数据库节点数量，必须指定，否则没法分片 --> <property name="virtualBucketTimes">160</property><!-- 一个实际的数据库节点被映射为这么多虚拟节点，默认是160倍，也就是虚拟节点数是物理节点数的160倍 --> <!-- <property name="weightMapFile">weightMapFile</property> 节点的权重，没有指定权重的节点默认是1。以properties文件的格式填写，以从0开始到count-1的整数值也就是节点索引为key，以节点权重值为值。所有权重值必须是正整数，否则以1代替 --> <!-- <property name="bucketMapPath">/etc/mycat/bucketMapPath</property> 用于测试时观察各物理节点与虚拟节点的分布情况，如果指定了这个属性，会把虚拟节点的murmur hash值与物理节点的映射按行输出到这个文件，没有默认值，如果不指定，就不会输出任何东西 --> </function> <function name="crc32slot" class="io.mycat.route.function.PartitionByCRC32PreSlot"> </function> <function name="hash-int" class="io.mycat.route.function.PartitionByFileMap"> <property name="mapFile">partition-hash-int.txt</property> </function> <function name="rang-long" class="io.mycat.route.function.AutoPartitionByLong"> <property name="mapFile">autopartition-long.txt</property> </function> <function name="mod-long" class="io.mycat.route.function.PartitionByMod"> <!-- how many data nodes --> <property name="count">3</property> </function> <function name="func1" class="io.mycat.route.function.PartitionByLong"> <property name="partitionCount">8</property> <property name="partitionLength">128</property> </function> <function name="latestMonth" class="io.mycat.route.function.LatestMonthPartion"> <property name="splitOneDay">24</property> </function> <function name="partbymonth" class="io.mycat.route.function.PartitionByMonth"> <property name="dateFormat">yyyy-MM-dd</property> <property name="sBeginDate">2015-01-01</property> </function> <function name="rang-mod" class="io.mycat.route.function.PartitionByRangeMod"> <property name="mapFile">partition-range-mod.txt</property> </function> <function name="jump-consistent-hash" class="io.mycat.route.function.PartitionByJumpConsistentHash"> <property name="totalBuckets">3</property> </function> </mycat:rule>
需要的可自行修改。
3、整合
pom依赖：
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.0.0</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies>
application.yml配置文件：
#设置应用端口 server: port: 8080 spring: datasource: driver-class-name: com.mysql.cj.jdbc.Driver # Mycat连接 url: jdbc:mysql://localhost:8066/springboot?useUnicode=true&characterEncoding=utf-8&autoReconnect=true&zeroDateTimeBehavior=convertToNull&useSSL=false&serverTimezone=GMT%2B8 username: root password: 123456 # MyBatis mybatis: type-aliases-package: com.example.springbootmybatismycat.domain mapper-locations: classpath:/mybatis/*.xml #sql打印配置 configuration: log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
整体文件结构如图：
其他实体类等就不放上去了，有需要的可自行到github上下载测试。
4、测试
打开浏览器，使用测试接口测试
4.1 tb_company表测试
添加公司：
查看公司：
查看mycat:
查看mysql:
可以看到正如配置的：
<table name="tb_company" primaryKey="ID" type="global" dataNode="dn1,dn2,dn3" />
tb_company配置为了全局，所以在每个数据库中都有数据。
4.2 tb_User表测试
添加用户：
查看用户：
查看mycat:
查看mysql:
因为schema.xml配置中tb_user的配置为：
<table name="tb_user" dataNode="dn1,dn2,dn3" rule="auto-sharding-long" />
对应rule规则为：
<tableRule name="auto-sharding-long"> <rule> <columns>id</columns> <algorithm>rang-long</algorithm> </rule> </tableRule> <function name="rang-long" class="io.mycat.route.function.AutoPartitionByLong"> <property name="mapFile">autopartition-long.txt</property> </function>
autopartition-long.txt文件为：
# range start-end ,data node index
# K=1000,M=10000.
0-500M=0
500M-1000M=1
1000M-1500M=2
按照规则auto-sharding-long进行分区处理，id为1时对应0，即db1数据库。
5、问题
在新增用户时报错：partition table, insert must provide ColumnList错误，解决：
将insert into tb_user VALUES (#{userId}, #{userName},#{companyId});
改为
insert into tb_user(id, name, company_id) VALUES (#{userId}, #{userName},#{companyId});
即加上所有的列字段