关于datasource注入问题 about tcc-transaction

[changmingxie]

@fuzhq
你好～，第一个问题，可以参考tcc-transaction-dubbo-order项目里的配置，在appcontext-service-datasource.xml中：

<bean id="orderDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
          destroy-method="close" lazy-init="false">
        <property name="driverClass" value="#{jdbc['jdbc.driverClassName']}"/>
        <property name="jdbcUrl" value="#{jdbc['jdbc.url']}"/>
        <property name="user" value="#{jdbc['jdbc.username']}"/>
        <property name="password" value="#{jdbc['jdbc.password']}"/>
        <property name="initialPoolSize" value="#{jdbc['c3p0.initialPoolSize']}"/>
        <property name="minPoolSize" value="#{jdbc['c3p0.minPoolSize']}"/>
        <property name="maxPoolSize" value="#{jdbc['c3p0.maxPoolSize']}"/>
        <property name="acquireIncrement" value="#{jdbc['c3p0.acquireIncrement']}"/>
        <property name="maxIdleTime" value="#{jdbc['c3p0.maxIdleTime']}"/>
        <property name="checkoutTimeout" value="#{jdbc['c3p0.checkoutTimeout']}"/>
    </bean>

在appcontext-service-dao.xml中：

 <bean id="transactionRepository"
    class="org.mengyun.tcctransaction.spring.repository.SpringJdbcTransactionRepository">
    <property name="dataSource" ref="orderDataSource"/>
    </bean>

另外一个问题：FileSystemTransactionRepository 适合事务提供方节点或是事务调用方是单节点场景，RedisTransactionRepository、ZooKeeperTransactionRepository和JdbcTransactionRepository适合事务提供方节点或是事务调用方节点是多个节点场景（集群），在tcc-transaction-unit-test项目里的tcc-transaction-unit-test.xml中有这些repository的配置示例，在运行时只需要配置一个，如下：

<context:component-scan base-package="org.mengyun.tcctransaction.unittest"/>


<bean class="org.mengyun.tcctransaction.spring.recover.DefaultRecoverConfig">
    <property name="maxRetryCount" value="30"/>
    <property name="recoverDuration" value="5"/>
    <property name="cronExpression" value="0/15 * * * * ?"/>
</bean>

<bean id="transactionRepository"
      class="org.mengyun.tcctransaction.spring.repository.SpringJdbcTransactionRepository">
    <property name="dataSource" ref="dataSource"/>
</bean>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
      destroy-method="close">
    <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
    <property name="url" value="jdbc:mysql://127.0.0.1:3306/test"/>
    <property name="username" value="root"/>
    <property name="password" value=""/>
</bean>

<!--<bean id="transactionRepository"-->
<!--class="org.mengyun.tcctransaction.repository.ZooKeeperTransactionRepository">-->
<!--&lt;!&ndash;<property name="zkServers" value="localhost:2181,localhost:2183,localhost:2185"/>&ndash;&gt;-->
<!--<property name="zkServers" value="localhost:2181"/>-->
<!--<property name="zkTimeout" value="10000"/>-->
<!--<property name="zkRootPath" value="/tcc_ut"/>-->
<!--</bean>-->


<!--recommanded way; to use this, make sure redis is safely durable,which means need set redis as AOF mode and always fsync.
  appendonly yes
  appendfsync always
  -->
<!--<bean id="transactionRepository" class="org.mengyun.tcctransaction.repository.RedisTransactionRepository">-->
<!--<property name="keyPrefix" value="tcc_ut_"/>-->
<!--<property name="jedisPool" ref="jedisPool"/>-->
<!--</bean>-->

<!--<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">-->
<!--<property name="maxTotal" value="1000"/>-->
<!--<property name="maxWaitMillis" value="1000"/>-->
<!--</bean>-->

<!--<bean id="jedisPool" class="redis.clients.jedis.JedisPool">-->
<!--<constructor-arg index="0" ref="jedisPoolConfig"/>-->
<!--<constructor-arg index="1" value="127.0.0.1"/>-->
<!--<constructor-arg index="2" value="6379" type="int"/>-->
<!--<constructor-arg index="3" value="1000" type="int"/>-->
<!--&lt;!&ndash;<constructor-arg index="4" value="${redis.password}"/>&ndash;&gt;-->
<!--</bean>-->

<!--<bean id="transactionRepository" class="org.mengyun.tcctransaction.repository.FileSystemTransactionRepository">-->
<!--<property name="rootPath" value="/data/tcc"/>-->
<!--</bean>-->