Accessing and querying the database

This page describes how to access and query the graph database from java code.

• The DataAccess interface
• The QueryFactory

The DataAccess interface

DataAccess is the entry point to the graph database. It provides access to 3 main database functions:

• The QueryFactory which enables you to perform read, write and update operations
• The MetaModel which provides information about the data graph currently stored in the database. For more information, see the MetaModel page
• Registration of listeners to obtain database change notifications.

To obtain an instance of a DataAccess. You need to use constructor injection from any class annotated with @Module or @Service or @CoreImpl as shown below:

		@Module
		public class MyFeature implements ModularInterface{
			
			
			// Private Reference
			private final DataAccess access;
			
			
			// Constructor injection
			public MyFeature(DataAccess access){
				this.access = access;
			}
			
		}

If you wish to learn more about dependency injection, please have a look at the dependency injection page

The QueryFactory