Based on Openejb :: Container :: CORE framework to achieve the development skills of high -efficiency Java libraries
Based on Openejb :: Container :: CORE framework to achieve the development skills of high -efficiency Java libraries
Introduction:
OpenEjb is an open source enterprise Java library that provides a lightweight container framework to build an application based on ENB (Enterprise JavaBean).Its core framework OpenEjb :: container :: core is widely used in the development and deployment process of Java libraries.This article will introduce how to use OpenEjb :: Container :: Core framework to develop efficient Java class libraries and demonstrate through instance code.
1. Openejb :: container :: core Framework Overview
Openejb :: Container :: Core framework is one of the core components of the OpenEjb project. It provides a lightweight container for running and managing EJB components.This framework has the following characteristics:
1. Lightweight: OpenEjb :: container :: Core framework uses lightweight design ideas, making development and deployment EJB components very simple and efficient.
2. Scalability: This framework supports plug -in extensions and can customize and extend various functions according to actual needs.
3. High performance: OpenEjb :: Container :: CORE framework has high performance and high efficiency when running and managing EJB components. Through optimized algorithms and data structures, the system's response speed and throughput are improved.
Second, the technique of developing efficient Java libraries
3. Use dependency injection: Openejb :: container :: The core framework has built -in support for dependencies injection, and the tasks of dependent management can be handed over to the framework.By using dependency injection, the coupling between classes can be reduced to improve the testability and scalability of the code.
4. Optimize database access: Database operations often need to be involved in the Java class library. By optimizing database access by reasonable optimization, such as batch operations and optimization query, can improve the performance of the Java library.
5. Use the cache mechanism: For some computing dense operations, you can use cache to reduce repeated calculations and improve the performance of the Java class library.Openejb :: container :: Core framework has built -in cache support, which can easily achieve cache function.
6. Motor unit test: When developing the Java library, you can use the unit test framework such as Junit to test to verify the correctness and performance of the code.
Third, sample code
Below is a simple example code that demonstrates how to develop an efficient Java class library based on OpenEjb :: container :: core framework:
import org.apache.openejb.api.LocalBean;
import javax.ejb.Stateless;
@Stateless
@LocalBean
public class MathLibrary {
public int add(int a, int b) {
return a + b;
}
public int subtract(int a, int b) {
return a - b;
}
public int multiply(int a, int b) {
return a * b;
}
public int divide(int a, int b) {
return a / b;
}
}
in conclusion:
