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A new dynamic method named withNeo4j withOdb will be injected into all controllers, giving you access to an a org.neo4j.graphgraphdb.GraphDatabaseService instance object, with which you'll be able to make calls to the database. Remember to make all calls to the database off the EDT otherwise your application may appear unresponsive when doing long computations inside the EDT.

Scripts

• create-relationship-type - creates a new enum that implements RelationshipType at src/main.

Dynamic methods

The following methods and properties are added via MOP to Neo4j classes:

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

package sample
class SampleController {
    def queryAllDataSources = {
        withNeo4j { dsName, graphdb -> ... }
        withNeo4j('internal') { dsName, graphdb -> ... }
    }
}

This method is also accessible to any component through the singleton griffon.plugins.neo4j.Neo4jConnector. You can inject these methods to non-artifacts via metaclasses. Simply grab hold of a particular metaclass and call Neo4jConnector.enhance(metaClassInstance).

Scripts

• create-relationship-type - creates a new enum that implements RelationshipType at src/main.

Configuration

Dynamic method injection

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The following events will be triggered by this addon

• Neo4jConnectStart[config, databaseName] - triggered before connecting to the datastore
• Neo4jConnectEnd[databaseName, db] - triggered after connecting to the datastore
• Neo4jDisconnectStart[config, databaseName, db] - triggered before disconnecting from the datastore
• Neo4jDisconnectEnd[config, databaseName] - triggered after disconnecting from the datastore

IndexService

The plugin will create an instance of LuceneIndexService by default. You may change this setting by setting a configuration flag in Application.groovy

griffon.neo4j.index.type = 'fulltext' // valid values are: normal, fulltext, query

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Multiple DataSources

The config file Neo4jConfig.groovy defines a default dataSource block. As the name implies this is the dataSource used by default, however you can configure named dataSources by adding a new config block. For example connecting to a dataSource whose name is 'internal' can be done in this way

databases {
    internal {
        params = [:]
	    storeDir = 'neo4j/internal'
	}
}

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

Example

A trivial sample application can be found at https://github.com/aalmiray/griffon_sample_apps/tree/master/persistence/neo4j

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