Joget Workflow v6 Beta 4 Released

Check out the latest Joget Workflow v6 Beta for many new features and improvements in user experience (UX), app maintainability and performance.

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Sometime, you may want to have your own Hibernate entity and dao to access extra database table in your plugin. It is very simple to achieve that by adding the following file and class to your plugin.

Similar to development in Spring + Hibernate, a application context file is required for your plugin. In my sample plugin, I created a productsApplicationContext.xml as below

 

<?xml version="1.0" encoding="UTF-8"?>
 
 
 
    <bean id="productSessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="setupDataSource"/>
        <property name="mappingResources">
            <list>
                <value>/org/joget/sample/products/model/Products.hbm.xml</value>
             </list>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
                <prop key="hibernate.show_sql">false</prop>
                <prop key="hibernate.format_sql">false</prop>
            </props>
        </property>
    </bean>
 
    <bean id="productsDao" class="org.joget.products.dao.ProductsDaoImpl">
        <property name="sessionFactory" ref="productSessionFactory" />
    </bean>
 
</beans>

 

In the application context, I created 2 beans. Bean "productSessionFactory" is to initialize a session factory with the hibernate mapping file. Bean "productsDao" is to initialize the dao object of my sample plugin.

Next, we need a Hibernate Mapping file. In my sample plugin, it is /org/joget/sample/products/model/Products.hbm.xml. It mapped the POJO "org.joget.products.model.Product" with "valu_products" table.

 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
  <class entity-name="Products" name="org.joget.products.model.Product" table="valu_products">
    <id column="id" name="id" type="string"/>
    <property column="name" name="name" type="string"/>
    <property column="description" name="description" type="string"/>
  </class>
</hibernate-mapping>

 

You need a utility class to initialized your application context and allow you to retrieve the bean object.

 

package org.joget.products;
 
import org.joget.apps.app.service.AppUtil;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
 
public class AppContext {
 
    private static AppContext instance;
    private AbstractApplicationContext appContext;
 
    public synchronized static AppContext getInstance() {
        if (instance == null) {
            instance = new AppContext();
        }
        return instance;
    }
 
    private AppContext() {
        Thread currentThread = Thread.currentThread();
        ClassLoader threadContextClassLoader = currentThread.getContextClassLoader();
        try {
            currentThread.setContextClassLoader(this.getClass().getClassLoader());
            this.appContext = new ClassPathXmlApplicationContext(new String[]{"/productsApplicationContext.xml"}, this.getClass(), AppUtil.getApplicationContext());
        finally {
            currentThread.setContextClassLoader(threadContextClassLoader);
        }
    }
 
    public AbstractApplicationContext getAppContext() {
        return appContext;
    }
}

 

You need to orverride findSession method in  ProductsDaoImpl as compared to joget version 4.

 

package org.joget.products.dao;
import java.util.Collection;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.joget.commons.spring.model.AbstractSpringDao;
import org.joget.commons.util.LogUtil;
import org.joget.products.model.Product;
 
public class ProductsDaoImpl extends AbstractSpringDao implements ProductsDao {
 
    @Override
    public Session findSession() {
        Session session = null;
        SessionFactory sf = super.getSessionFactory();
         
        try {
            session = sf.getCurrentSession();
        catch (Exception e) {}
         
        if (session == null) {
            session = sf.openSession();
        }
         
        return session;
    }
     
    public Boolean addProduct(Product product) {
        try {
            save("Products", product);
            return true;
        catch (Exception e) {
            LogUtil.error(ProductsDaoImpl.class.getName(), e, "Add Product Error!");
            return false;
        }
    }
 
    public Boolean updateProduct(Product product) {
        try {
            merge("Products", product);
            return true;
        catch (Exception e) {
            LogUtil.error(ProductsDaoImpl.class.getName(), e, "Update Product Error!");
            return false;
        }
    }
 
    public Boolean deleteProduct(String id) {
        try {
            Product product = getProduct(id);
            if (product != null) {
           
                delete("Products", product);
            }
            return true;
        catch (Exception e) {
            LogUtil.error(ProductsDaoImpl.class.getName(), e, "Delete Product Error!");
            return false;
        }
    }
 
    public Product getProduct(String id) {
        try {
            return (Product) find("Products", id);
        catch (Exception e) {
            LogUtil.error(ProductsDaoImpl.class.getName(), e, "Get Product Error!");
            return null;
        }
    }
 
    public Collection<Product> getProducts() {
        try {
            Collection products = super.find("Products"""nullnullnullnullnull);
            return products;
        catch (Exception e) {
            LogUtil.error(ProductsDaoImpl.class.getName(), e, "Get Products Error!");
        }
        return null;
    }
   
}

 

After you implemented your POJO and dao class, you should be able to use your dao in your plugin as following. Please refer to the attached sample plugin for POJO and dao implementation.

 

ProductsDao productdao = (ProductsDao) AppContext.getInstance().getAppContext().getBean("productsDao");
 
Product p = new Product();
p.setId("001");
p.setName("Product A");
p.setDescription("Product A Descpription");
 
productdao.addProduct(p);

 

In this KB:sample plugin, you are able to add, delete and list product by the following JSON API.

To add,

 

http://localhost:8080/jw/web/json/plugin/org.joget.products.ProductsApi/service?_action=add&name=Product A&desc=Product A Descpription

 

To delete,

 

http://localhost:8080/jw/web/json/plugin/org.joget.products.ProductsApi/service?_action=delete&id=001

 

To list all products,

 

http://localhost:8080/jw/web/json/plugin/org.joget.products.ProductsApi/service?_action=list

 

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