Cannot Configure Grails 3 Multiple Data Sources - grails

Question

I have recently attempted to create an application that allows me to compare 3 separate databases for their values. The databases are 3 Oracle instances which house (essentially) the same database, but in a DEV/TEST/PROD setting.
What I want to do is create one Domain class in GRAILS 3. I then want to be able to fetch the records which that domain class maps to, but do it for all 3 environments.
From reading the Grails 3 docs, it looks like this should be possible by defining 3 datasources in application.yml (in my example here I define 4):
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
and then within the domain class' mapping specifying datasources in the mapping:
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 ) '
}
}
}
and then, within my controller, I should be able to do something like this:
params.max = Math.min(max ?: 10, 100)
dmjTypesListDev = DmjTypes.dataSource1.list(params)
dmjTypesListTest = DmjTypes.dataSource2.list(params)
dmjTypesListProd = DmjTypes.dataSource3.list(params)
I am getting an error upon the first call:
URI /dmjTypes/index
Class groovy.lang.MissingPropertyException
Message null
Caused by No such property: dataSource1 for class: plsutils.DmjTypes
I'm using ojdbc7.jar, connection to Oracle 11g and I'm using Grails 3.0.9.
I can't help but think I'm doing something subtly stupid somewhere. Can anyone please help me with this?
Cheers,
Allen

Answer 1

Basing on official documantation try dataSources keyword:
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 2

Once I corrected the version of grails referred to in the gradle.properties and performed a complete clean and rebuild, I was able to get it working. I believe all my issues were because of a version mismatch of the grails I was using to build it.
So, this is the appropriate datasource entry:
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
This is the working domain 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 ) '
}
}
}

Answer 3

Try this:
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
In controller:
static mapping = {
datasources(['dataSource', 'dataSource2', 'dataSource3'])
.....
}