oraclekv

The Oraclekv plugin enables lightweight access to Oracle NoSQL datastores. This plugin does NOT provide domain classes nor dynamic finders like GORM does.

Usage

Upon installation the plugin will generate the following artifacts in $appdir/griffon-app/conf:

• OraclekvConfig.groovy - contains the store definitions.
• BootstrapOraclekv.groovy - defines init/destroy hooks for data to be manipulated during app startup/shutdown.

A new dynamic method named withOraclekv will be injected into all controllers, giving you access to an oraclekv.store.KVStore object, with which you'll be able to make calls to the store. Remember to make all store calls off the EDT otherwise your application may appear unresponsive when doing long computations inside the EDT.

This method is aware of multiple stores. If no storeName is specified when calling it then the default store will be selected. Here are two example usages, the first queries against the default store while the second queries a store whose name has been configured as 'internal'

package sample
class SampleController {
    def queryAllDataSources = {
        withOraclekv { storeName, store -> ... }
        withOraclekv('internal') { storeName, store -> ... }
    }
}

This method is also accessible to any component through the singleton griffon.plugins.oraclekv.OraclekvConnector. You can inject these methods to non-artifacts via metaclasses. Simply grab hold of a particular metaclass and call OraclekvEnhancer.enhance(metaClassInstance, oraclekvProviderInstance).

Configuration

Dynamic method injection

The withOraclekv() dynamic method will be added to controllers by default. You can change this setting by adding a configuration flag in griffon-app/conf/Config.groovy

griffon.oraclekv.injectInto = ['controller', 'service']

Events

The following events will be triggered by this addon

• OraclekvConnectStart[config, storeName] - triggered before connecting to the store
• OraclekvConnectEnd[storeName, store] - triggered after connecting to the store
• OraclekvDisconnectStart[config, storeName, store] - triggered before disconnecting from the store
• OraclekvDisconnectEnd[config, storeName] - triggered after disconnecting from the store

Multiple Stores

The config file OraclekvConfig.groovy defines a default store block. As the name implies this is the store used by default, however you can configure named stores by adding a new config block. For example connecting to a store whose name is 'internal' can be done in this way

stores {
    internal {
        host = 'server.acme.com'
    }
}

This block can be used inside the environments() block in the same way as the default store block is used.

Example

A trivial sample application can be found at https://github.com/aalmiray/griffon_sample_apps/tree/master/persistence/oraclekv

Testing

The withOraclekv() dynamic method will not be automatically injected during unit testing, because addons are simply not initialized for this kind of tests. However you can use OraclekvEnhancer.enhance(metaClassInstance, oraclekvProviderInstance) where oraclekvProviderInstance is of type griffon.plugins.oraclekv.OraclekvProvider. The contract for this interface looks like this

public interface OraclekvProvider {
    Object withOraclekv(Closure closure);
    Object withOraclekv(String storeName, Closure closure);
    <T> T withOraclekv(CallableWithArgs<T> callable);
    <T> T withOraclekv(String storeName, CallableWithArgs<T> callable);
}

It's up to you define how these methods need to be implemented for your tests. For example, here's an implementation that never fails regardless of the arguments it receives

class MyOraclekvProvider implements OraclekvProvider {
    Object withOraclekv(String storeName = 'default', Closure closure) { null }
    public <T> T withOraclekv(String storeName = 'default', CallableWithArgs<T> callable) { null }
}

This implementation may be used in the following way

class MyServiceTests extends GriffonUnitTestCase {
    void testSmokeAndMirrors() {
        MyService service = new MyService()
        OraclekvEnhancer.enhance(service.metaClass, new MyOraclekvProvider())
        // exercise service methods
    }
}