In this tutorial we will learn how to create and persist an EMF model.

Download Eclipse Galileo

Download Eclipse Galileo 3.5M6 from the Eclipse.org download page, extract on your file-system and run eclipse.exe.

Add EMF and Teneo support

Go to Help -> Install New Software...; in the text field "Work with:" select "All Avaiable Sites".
In the text just after (not labeled) enter "EMF" and wait for the results; you should see the following items:

Check both EMF SDK and Teneo EMF Hibernate SDK, then press Next and follow the wizard to install the new features.
Restart Eclipse at the end of the installation.

Create the EMF Project

Go to File -> New -> Other...; expand Eclipse Modeling Framework and select Empty EMF Project.

press Next, enter a name for the project (e.g. MyModel) and press Finish.

Create the Ecore Model

Select the model folder (generated from the previous EMF project wizard), right-click New -> Other... and select Ecore Model under Eclipse Modeling Framework

then press Next and enter a name for the Ecore Model or leave the proposed one (My.ecore), press Finish.

Expand the Ecore Model root node, select the only unnamed child node and right-click Show Properties View

In the Properties view, enter "orders" as the Name and NS Prefix, while as NS URI enter "http://orders".

Right-click the node orders and select New Child -> EClass

select the new child, go to the Property View and enter "Customer" as the Name

Right-click the new node Customer and select New Child -> EAttribute

select the new child, go to the Property View and enter "code" as the Name and EString as the Etype

in the same way add another EAttribute called "name" of type EString and press Ctrl-S to save the work.

Create the Generator Model

press the Load button in the Ecore Import step, then Next and Finish.

Now, from the Generator Model editor just opened, right-click Generate Model Codel

Use EMF-Teneo to persist and access the Model on a Database

Prior to invoking persistence operations on the EMF Model we need to include some dependencies into the current project.
In order to do this double-click the file plugin.xml from the Package Explorer view and select the tab Dependencies. Then press the Add... button in the left-upper area (Required Plug-ins) and add the following bundles:

- org.eclipse.emf.ecore.xmi
- org.eclipse.emf.teneo.hibernate
- org.apache.commons.logging

We will also need some other JARs not included into the Eclipse environment. Let's create therefore an ordinary folder for the additional libraries (New -> Folder), let's call this "lib".

The needed libraries are all included in the Hibernate Core Package, downloadable at http://www.hibernate.org/downloads.htmll.

into the lib folder.

Now go to the plugin.xml, select the Runtime tab, go to the Classpath area (bottom-right), press the Add... button, browse for the lib folder and add all the JARs.

In order to test the persistence features of EMF and Teneo we will create a new source folder in our project (New -> Source Folder); let's call it "src_test" and create there a new package and class with the following code into the main method:

import java.util.Properties;
import orders.Customer;
import orders.OrdersPackage;
import org.eclipse.emf.ecore.EPackage;
import org.eclipse.emf.teneo.hibernate.HbDataStore;
import org.eclipse.emf.teneo.hibernate.HbHelper;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Environment;

...

HbDataStore hbds = (HbDataStore)HbHelper.INSTANCE.createRegisterDataStore("MyDb");

final Properties props = new Properties();
props.setProperty(Environment.DRIVER, "com.mysql.jdbc.Driver");
props.setProperty(Environment.URL, "jdbc:mysql://127.0.0.1:3306/test");
props.setProperty(Environment.USER, "root");
props.setProperty(Environment.PASS, "admin");
props.setProperty(Environment.DIALECT, org.hibernate.dialect.MySQLInnoDBDialect.class.getName());
props.setProperty(Environment.SHOW_SQL, "true");
hbds.setProperties(props);

hbds.setEPackages(new EPackage[]{OrdersPackage.eINSTANCE});
hbds.initialize();
SessionFactory sessionFactory = hbds.getSessionFactory();
Session session = sessionFactory.openSession();
Transaction tx = session.getTransaction();
tx.begin();
Customer customer = OrdersPackage.eINSTANCE.getOrdersFactory().createCustomer();
customer.setCode("0023485");
session.save(customer);

tx.commit();
session.close();

Then launch this class and see what happens.

Download Eclipse Galileo

Download Eclipse Galileo 3.5M6 from here, extract on your file-system and run eclipse.exe.

Add EMF and Teneo support

Go to Help -> Install New Software...; in the text field "Work with:" select "All Avaiable Sites".
In the text just after (not labeled) enter "EMF" and wait for the results; you should see the following items:

Check both EMF SDK and Teneo EMF Hibernate SDK, then press Next and follow the wizard to install the new features.
Restart Eclipse at the end of the installation.

Create the EMF Project

Go to File -> New -> Other...; expand Eclipse Modeling Framework and select Empty EMF Project.

press Next, enter a name for the project (e.g. MyModel) and press Finish.

Create the Ecore Model

Select the model folder (generated from the previous EMF project wizard), right-click New -> Other... and select Ecore Model under Eclipse Modeling Framework

then press Next and enter a name for the Ecore Model or leave the proposed one (My.ecore), press Finish.

Expand the Ecore Model root node, select the only unnamed child node and right-click Show Properties View

In the Properties view, enter "orders" as the Name and NS Prefix, while as NS URI enter "http://orders".

Right-click the node orders and select New Child -> EClass

select the new child, go to the Property View and enter "Customer" as the Name

Right-click the new node Customer and select New Child -> EAttribute

select the new child, go to the Property View and enter "code" as the Name and EString as the Etype

in the same way add another EAttribute called "name" of type EString and press Ctrl-S to save the work.

Create the Generator Model

press the Load button in the Ecore Import step, then Next and Finish.

Now, from the Generator Model editor just opened, right-click Generate Model Codel

Use EMF-Teneo to persist and access the Model on a Database

Prior to invoking persistence operations on the EMF Model we need to include some dependencies into the current project.
In order to do this double-click the file plugin.xml from the Package Explorer view and select the tab Dependencies. Then press the Add... button in the left-upper area (Required Plug-ins) and add the following bundles:

- org.eclipse.emf.ecore.xmi
- org.eclipse.emf.teneo.hibernate
- org.apache.commons.logging

We will also need some other JARs not included into the Eclipse environment. Let's create therefore an ordinary folder for the additional libraries (New -> Folder), let's call this "lib".

The needed libraries are all included in the Hibernate Core Package, downloadable at http://www.hibernate.org/6.html.

into the lib folder.

Now go to the plugin.xml, select the Runtime tab, go to the Classpath area (bottom-right), press the Add... button, browse for the lib folder and add all the JARs.

In order to test the persistence features of EMF and Teneo we will create a new source folder in our project (New -> Source Folder); let's call it "src_test" and create there a new package and class with the following code into the main method:

import java.util.Properties;
import orders.Customer;
import orders.OrdersPackage;
import org.eclipse.emf.ecore.EPackage;
import org.eclipse.emf.teneo.hibernate.HbDataStore;
import org.eclipse.emf.teneo.hibernate.HbHelper;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Environment;

...

HbDataStore hbds = (HbDataStore)HbHelper.INSTANCE.createRegisterDataStore("MyDb");

final Properties props = new Properties();
props.setProperty(Environment.DRIVER, "com.mysql.jdbc.Driver");
props.setProperty(Environment.URL, "jdbc:mysql://127.0.0.1:3306/test");
props.setProperty(Environment.USER, "root");
props.setProperty(Environment.PASS, "admin");
props.setProperty(Environment.DIALECT, org.hibernate.dialect.MySQLInnoDBDialect.class.getName());
props.setProperty(Environment.SHOW_SQL, "true");
hbds.setProperties(props);

hbds.setEPackages(new EPackage[]{OrdersPackage.eINSTANCE});
hbds.initialize();
SessionFactory sessionFactory = hbds.getSessionFactory();
Session session = sessionFactory.openSession();
Transaction tx = session.getTransaction();
tx.begin();
Customer customer = OrdersPackage.eINSTANCE.getOrdersFactory().createCustomer();
customer.setCode("0023485");
session.save(customer);

tx.commit();
session.close();

Then launch this class and see what happens.

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