How to use openjb :: container :: core framework in the java library
How to use openjb :: container :: core framework in the java library
Openejb is an open source enterprise -level Javaee container based on Apache Tomee.It provides a lightweight embedded container that can be used in the Java library to simplify the development process.
In this article, we will introduce how to use openjb :: container :: core framework in the java class library.Here are some steps:
Step 1: Download and install OpenEjb
First, you need to download OpenEjb :: container :: core framework.You can get the latest version from the official website or Maven central warehouse.
Step 2: Create a simple Java class library project
Create a new Java -class library project in your ID, and add the OpenEjb framework as the project dependencies.
Step 3: Create a simple application
Create a simple application class in your Java library project.For example, the following is a simple Java class:
import javax.ejb.Stateless;
import javax.ejb.LocalBean;
@Stateless
@LocalBean
public class Calculator {
public int add(int a, int b) {
return a + b;
}
}
This is a simple calculator class, which has a "ADD" method to add two numbers.
Step 4: Write a test class
In the Java class library project, create a test class to test your application.The following is a simple test example:
import org.apache.openejb.api.LocalClient;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
@LocalClient
public class CalculatorTest {
private Calculator calculator;
@Before
public void setUp() {
calculator = new Calculator();
}
@Test
public void testAddition() {
int result = calculator.add(2, 3);
Assert.assertEquals(5, result);
}
}
This test uses the Junit framework, which calls the "ADD" method on the application instance and asserts whether the results match the expected results.
Step 5: Start the embedded OpenEJB container
In the test class, you need to start the embedded OpenEjb container to run the test.The following is a simple example:
import org.apache.openejb.junit.ApplicationComposer;
import org.junit.runner.RunWith;
@RunWith(ApplicationComposer.class)
public class CalculatorTest {
// ...
}
This will expand the running test using Junit's ApplicationComposer.
Step 6: Run test test
You can run the test class to verify your application.If everything is normal, you will see a message passing.
This is the basic step of developing and testing applications in the Java library using OpenJB :: container :: core framework.
I hope this article can help you learn how to use OpenEjb :: container :: core framework in the java library.If necessary, you can add more details and code examples in the article to meet your needs.
