无法配置 Grails 3 多数据源

Question

我最近尝试创建一个应用程序，允许我比较 3 个不同的数据库的值。数据库是 3 个 Oracle 实例，它们容纳（基本上）相同的数据库，但在 DEV/TEST/PROD 设置中。

我想做的是在 GRAILS 3 中创建一个域 class。然后我希望能够获取该域 class 映射到的记录，但是对所有 3环境。

通过阅读 Grails 3 文档，看起来这应该可以通过在 application.yml 中定义 3 个数据源来实现（在我的示例中我定义了 4 个）：

dataSources:
    dataSource:
        pooled: true
        jmxExport: true
        logSql: true
        driverClassName: oracle.jdbc.OracleDriver
        username: MYUSER
        password: Password1
        dbCreate: validate
        url: jdbc:oracle:thin:@someserver:1521:DEV1
    dataSource1:
        pooled: true
        jmxExport: true
        logSql: true
        driverClassName: oracle.jdbc.OracleDriver
        username: MYUSER
        password: Password1
        dbCreate: validate
        url: jdbc:oracle:thin:@someserver:1521:DEV1
    dataSource2:
        pooled: true
        jmxExport: true
        logSql: true
        driverClassName: oracle.jdbc.OracleDriver
        username: MYUSER
        password: Password1
        dbCreate: validate
        url: jdbc:oracle:thin:@someserver:1521:TEST1
    dataSource3:
        pooled: true
        jmxExport: true
        logSql: true
        driverClassName: oracle.jdbc.OracleDriver
        username: MYUSER
        password: Password1
        dbCreate: validate
        url: jdbc:oracle:thin:@someserver:1521:PROD1

然后在域 class' 映射中指定映射中的数据源：

package plsutils

class DmjTypes {
    String code
    String description
    Date insertDate
    String insertUser
    Date modifyDate
    String modifyUser

    String dbEnv

    static mapping = {
        datasources(['dataSource1', 'dataSource2', 'dataSource3'])

        version false
        table name: "CDE_DMJ_TYPES", schema: "MYSCHEMA"

        id generator: 'sequence' ,params:[sequence: 'DMJTY_SEQ']

        columns {
            id column: "DMJTY_ID"
            code column: "DMJTY_CDE"
            description column: "DMJTY_DESCR"
            insertDate column: "INSERT_DTT"
            insertUser column: "INSERT_USER"
            modifyDate column: "MODIFY_DTT"
            modifyUser column: "MODIFY_USER"
            dbEnv formula:'( select inst.instance_name || \'-\' ||     inst.host_name from v$instance inst ) '
        }

    }
}

然后，在我的控制器中，我应该能够做这样的事情：

params.max = Math.min(max ?: 10, 100)
dmjTypesListDev = DmjTypes.dataSource1.list(params)
dmjTypesListTest = DmjTypes.dataSource2.list(params)
dmjTypesListProd = DmjTypes.dataSource3.list(params)

第一次调用时出现错误：

URI /dmjTypes/index
Class groovy.lang.MissingPropertyException
Message null
Caused by No such property: dataSource1 for class: plsutils.DmjTypes

我正在使用 ojdbc7.jar，连接到 Oracle 11g，我正在使用 Grails 3.0.9。

我忍不住认为我在某处做了一些微妙的愚蠢事情。谁能帮我解决这个问题？

干杯，艾伦

Answer 1

试试这个：

dataSources:
    dataSource:
        pooled: true
        jmxExport: true
        logSql: true
        driverClassName: oracle.jdbc.driver.OracleDriver        
        username: MYUSER
        password: Password1
        dbCreate: validate
        autoReconnect: true
        #url: jdbc:oracle:thin:@someserver:1521:DEV1(I remember in 3.0.9 this is under environments:development:dataSources:dataSource)
    dataSource2:
        pooled: true
        jmxExport: true
        logSql: true
        driverClassName: oracle.jdbc.driver.OracleDriver
        dialect: org.hibernate.dialect.OracleDialect
        username: MYUSER
        password: Password1
        dbCreate: validate
        url: jdbc:oracle:thin:@someserver:1521:TEST1
        autoReconnect: true
    dataSource3:
        pooled: true
        jmxExport: true
        logSql: true
        driverClassName: oracle.jdbc.driver.OracleDriver
        dialect: org.hibernate.dialect.OracleDialect
        username: MYUSER
        password: Password1
        dbCreate: validate
        url: jdbc:oracle:thin:@someserver:1521:PROD1
        autoReconnect: true

在控制器中：

static mapping = {
        datasources(['dataSource', 'dataSource2', 'dataSource3'])
        .....
}

Answer 2

基于 official documantation 尝试 dataSources 关键字：

dataSources:
    dataSource:
        pooled: true
        jmxExport: true
        driverClassName: org.h2.Driver
        username: sa
        password:
    lookup:
        dialect: org.hibernate.dialect.MySQLInnoDBDialect
        driverClassName: com.mysql.jdbc.Driver
        username: lookup
        password: secret
        url: jdbc:mysql://localhost/lookup
        dbCreate: update

environments:
    development:
        dataSources:
            dataSource:
                dbCreate: create-drop
                url: jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
    test:
        dataSources:
            dataSource:
                dbCreate: update
                url: jdbc:h2:mem:testDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
    production:
        dataSources:
            dataSource:
                dbCreate: update
                url: jdbc:h2:prodDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
                properties:
                   jmxEnabled: true
                   initialSize: 5
                   …
            lookup:
                dialect: org.hibernate.dialect.Oracle10gDialect
                driverClassName: oracle.jdbc.driver.OracleDriver
                username: lookup
                password: secret
                url: jdbc:oracle:thin:@localhost:1521:lookup
                dbCreate: update

Answer 3

一旦我更正了 gradle.properties 中提到的 grails 版本并执行了完整的清理和重建，我就能够让它工作了。我相信我所有的问题都是因为我用来构建它的 grails 版本不匹配。

所以，这是合适的数据源条目：

dataSources:
    dataSource:
        pooled: true
        jmxExport: true
        driverClassName: oracle.jdbc.OracleDriver
        username: MYUSER
        password: Password1
        dbCreate: validate
        url: jdbc:oracle:thin:@somelocalserver:1521:LOCAL
    one:
        pooled: true
        jmxExport: true
        driverClassName: oracle.jdbc.OracleDriver
        username: MYUSER
        password: Password1
        dbCreate: validate
        url: jdbc:oracle:thin:@somedevserver:1521:DEV1
    two:
        pooled: true
        jmxExport: true
        driverClassName: oracle.jdbc.OracleDriver
        username: MYUSER
        password: Password1
        dbCreate: validate
        url: jdbc:oracle:thin:@sometestserver:1521:TEST1
    three:
        pooled: true
        jmxExport: true
        driverClassName: oracle.jdbc.OracleDriver
        username: MYUSER
        password: Password1
        dbCreate: validate
        url: jdbc:oracle:thin:@someproductionserver:1523:PROD1

这是工作域class:

class DmjTypes {
    String code
    String description
    Date insertDate
    String insertUser
    Date modifyDate
    String modifyUser

    String dbEnv

    static mapping = {
        datasources(['one', 'two', 'three'])

        version false
        table name: "CDE_DMJ_TYPES", schema: "MYSCHEMA"

        id generator: 'sequence' ,params:[sequence: 'DMJTY_SEQ']

        columns {
            id column: "DMJTY_ID"
            code column: "DMJTY_CDE"
            description column: "DMJTY_DESCR"
            insertDate column: "INSERT_DTT"
            insertUser column: "INSERT_USER"
            modifyDate column: "MODIFY_DTT"
            modifyUser column: "MODIFY_USER"
            dbEnv formula:'( select inst.instance_name || \'-\' ||     inst.host_name from v$instance inst ) '
        }

    }
}

无法配置 Grails 3 多数据源

Cannot Configure Grails 3 Multiple Data Sources

grails

grails-orm