Using mongodb and hibernate with grails3 - mysql

Question

I need to run a Grails 3 app against MySql/Hibernate and MongoDB.
(Had is running on Grails 2.5 without an hitch).
I tried many different combinations, searched and tried related SO answers, but with no luck.
Used the latest Mongodb plugin doc for the configuration.
Using Grails 3.1.10:
grailsVersion=3.1.10
I started with the following details in build.gradle:
buildscript {
ext {
grailsVersion = project.grailsVersion
}
repositories {
mavenLocal()
maven { url "https://repo.grails.org/grails/core" }
}
dependencies {
classpath "org.grails:grails-gradle-plugin:$grailsVersion"
classpath "com.bertramlabs.plugins:asset-pipeline-gradle:2.8.2"
classpath "org.grails.plugins:hibernate4:5.0.10"
}
}
...
dependencies {
compile "org.springframework.boot:spring-boot-starter-logging"
compile "org.springframework.boot:spring-boot-autoconfigure"
compile "org.grails:grails-core"
compile "org.springframework.boot:spring-boot-starter-actuator"
compile "org.springframework.boot:spring-boot-starter-tomcat"
compile "org.grails:grails-dependencies"
compile "org.grails:grails-web-boot"
compile "org.grails.plugins:cache"
compile "org.grails.plugins:scaffolding"
compile "org.grails.plugins:hibernate4"
compile "org.hibernate:hibernate-ehcache"
console "org.grails:grails-console"
profile "org.grails.profiles:web"
runtime "com.bertramlabs.plugins:asset-pipeline-grails:2.8.2"
testCompile "org.grails:grails-plugin-testing"
testCompile "org.grails.plugins:geb"
testRuntime "org.seleniumhq.selenium:selenium-htmlunit-driver:2.47.1"
testRuntime "net.sourceforge.htmlunit:htmlunit:2.18"
//databases
compile 'org.grails.plugins:mongodb:6.0.0.M2'
runtime 'mysql:mysql-connector-java:5.1.36'
...
}
The application.yml:
---
hibernate:
cache:
queries: false
use_second_level_cache: true
use_query_cache: false
region.factory_class: org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory
dataSource:
pooled: true
jmxExport: true
driverClassName: com.mysql.jdbc.Driver
environments:
development:
dataSource:
dbCreate: update
url: jdbc:mysql://localhost:3306/dbname
driverClassName: com.mysql.jdbc.Driver
dialect: org.hibernate.dialect.MySQL5InnoDBDialect
username : "xxx"
password : "yyy"
properties:
maxActive : 50
maxIdle: 25
minIdle: 5
...
grails:
mongodb:
host: "localhost"
port: 27017
username: "blah"
password: "blah"
databaseName: "foo"
Now this gives me an error:
15:13:58.001 [QUIET] [system.out] ERROR org.springframework.boot.SpringApplication - Application startup failed
15:13:58.001 [QUIET] [system.out] java.lang.NoClassDefFoundError: org/grails/datastore/gorm/plugin/support/ConfigSupport
15:13:58.001 [QUIET] [system.out] at grails.plugins.mongodb.MongodbGrailsPlugin.doWithSpring(MongodbGrailsPlugin.groovy:42)
The MongoDB grails plugin does not find ConfigSupport
ConfigSupport.prepareConfig(config, (ConfigurableApplicationContext) applicationContext)
I then tried to add the following plugins in all orders possible:
//compile 'org.grails:grails-datastore-gorm-hibernate4:6.0.0.M2'
//compile 'org.grails:grails-datastore-core:4.0.0.M2'
//compile 'org.grails:grails-datastore-gorm-plugin-support:6.0.0.M2'
//compile 'org.springframework.data:spring-data-mongodb:1.9.2.RELEASE'
//compile 'org.mongodb:mongodb-driver:3.3.0'
//compile 'org.mongodb:mongo-java-driver:3.3.0'
No luck.
I also moved the mongodb: section down to the grails: section in the yml file. Same error.
So the question is how to get MongoDB running with MySql with grails3.

Answer 1

Ok, stupid me. I solved the puzzle using these simple dependency settings:
compile "org.springframework.boot:spring-boot-starter-logging"
compile "org.springframework.boot:spring-boot-autoconfigure"
compile "org.grails:grails-core"
compile "org.springframework.boot:spring-boot-starter-actuator"
compile "org.springframework.boot:spring-boot-starter-tomcat"
compile "org.grails:grails-dependencies"
compile "org.grails:grails-web-boot"
compile "org.grails.plugins:cache"
compile "org.grails.plugins:scaffolding"
compile "org.grails.plugins:hibernate4"
compile "org.hibernate:hibernate-ehcache"
console "org.grails:grails-console"
profile "org.grails.profiles:web"
runtime "com.bertramlabs.plugins:asset-pipeline-grails:2.8.2"
testCompile "org.grails:grails-plugin-testing"
testCompile "org.grails.plugins:geb"
testRuntime "org.seleniumhq.selenium:selenium-htmlunit-driver:2.47.1"
testRuntime "net.sourceforge.htmlunit:htmlunit:2.18"
//databases
compile 'org.grails.plugins:mongodb'
runtime 'mysql:mysql-connector-java:5.1.36'
runtime 'com.googlecode.json-simple:json-simple:1.1'
It seems that the following line made the difference:
compile 'org.grails.plugins:mongodb'
Omitting the version number. This should be explained in the docs a bit better. Usually it is a good thing defining versions, or is this too old fashioned these days? :-)
Happy to have it working

Answer 2

Ok I found correct previous answer for referring mongodb plugin, i.e. compile 'org.grails.plugins:mongodb' but I want to sum up with a brief checklist, having me a correctly running mixed solution (both hibernate + mysql and mongodb), after many trials and errors. So, in order to have a mixed mysql/mongo grails3 configuration, you have to
insert compile 'org.grails.plugins:mongodb' (without any version) in build.gradle (remember that there is no BuildConfig.groovy in grails 3, as documented here/grails2->3)
keep ordinary dependency to hibernate/mysql, for example: compile 'org.grails.plugins:hibernate4' compile 'org.hibernate:hibernate-ehcache' runtime 'mysql:mysql-connector-java:5.1.38'
set up correctly connections in application.yml, but I prefer old-style application.groovy, in grails-app/conf (as in older GRAILS), as below (remember that in GRAILS3 differently from 2 you have to use mongodb and no more mongo keyword)
use ordinary GRAILS entities for mysql mapping
and use static mapWith="mongo" inside mongo entities (as stated in GRAILS-mongo doc)
not use usual mysql Long id for mongo, but ObjectId id, and for it import org.bson.types.ObjectId
Application.groovy set up
grails {
mongodb {
host = "localhost"
port = 27017
username = mongouser
password= mongopasswd
databaseName = mongoDBname
}
}
environments {
development {
dataSource {
driverClassName = "com.mysql.jdbc.Driver"
username = ...
password = ...
dbCreate = "create"
url = "jdbc:mysql://127.0.0.1:3306/dbnameMysql"
}
}
}
That's all. Enjoy MongoDB.

Answer 3

Not sure I can help much other than show my config that is confirmed working.
I've recently converted a 2.4.4 app to 3.1.8, admittedly I'm using Oracle as my RDBMS rather than mysql.
In build.gradle I just have:
dependencies {
classpath "org.grails.plugins:hibernate4:5.0.6"
...
}
dependencies {
compile "org.grails.plugins:mongodb:5.0.0.RC1"
...
}
And in application.yml:
mongodb:
databaseName: 'myApp'
engine: mapping
The engine: mapping bit was crucial for me, it reverts to the previous persistence engine as described here http://gorm.grails.org/latest/mongodb/manual/index.html
The doWithSpring() closure in my MongodbGrailsPlugin.groovy looks like:
Closure doWithSpring() {
def initializer = new MongoDbDataStoreSpringInitializer(config, grailsApplication.getArtefacts(DomainClassArtefactHandler.TYPE).collect() { GrailsClass cls -> cls.clazz })
initializer.registerApplicationIfNotPresent = false
initializer.setSecondaryDatastore( manager.hasGrailsPlugin("hibernate") )
return initializer.getBeanDefinitions((BeanDefinitionRegistry)applicationContext)
}
No reference to ConfigSupport which may have been added (or not) in your later version or there's a dependency missing.