The Enterprise Service Bus (ESB) is a central component of a distributed system that connects components and applications together. So what exactly is it? In this tutorial, I will introduce with all you. Why do we need ESB? Imagine, you are working in a system… Read More
In the previous tutorial, I introduced to you all about RAML to define APIs for RESTful Web Service. The APIkit Router is a function of Mule ESB that allows us to create new RESTful Web Service from a RAML file. How is it in details?… Read More
You all have probably worked with RESTful Web Service, but maybe not much have heard about RAML (RESTful API Modeling Language), a specification that helps us define API specs for the RESTful Web Service. In this tutorial, let’s learn about it, to know what it… Read More
Apache ActiveMQ is a popular open-source JMS (Java Message Service) server. In this tutorial, I will guide you all on how to install Apache ActiveMQ. First of all, we need to download the latest version of Apache ActiveMQ at https://activemq.apache.org/components/classic/download/ We have the version for… Read More
In this tutorial, I will guide to you all how to create new Mule project using Anypoint Studio to start creating a Mule application. Actually, creating new Mule project is as simple as creating a Eclipse project. However, here are some points that we should… Read More
To avoid multiple threads using a method at the same time, we can declare the method using synchronized keyword of Java like below:
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package com.huongdanjava.lombok; public class Example { public synchronized int calculate(int a, int b) { return a + b; } } |
Project Lombok also provides a safer way to do this by using @Synchronized annotation.
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package com.huongdanjava.lombok; import lombok.Synchronized; public class Example { @Synchronized public int calculate(int a, int b) { return a + b; } } |
With this annotation, Lombok will generate… Read More
When we use a resource like InputStream, OutputStream in Java, we should remember to close that resource after using. Before Java 7, we can close a resource in a finally block as below:
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package com.huongdanjava.lombok; import java.io.*; public class Example { public static void main(String[] args) throws IOException { InputStream is = null; try { is = new FileInputStream(new File("/Users/Khanh/text.txt")); } finally { if (is != null) { is.close(); } } } } |
Since Java 7, we can use the try with resource to… Read More
Normally, when we use a Logging framework like Log4J, Logback or Simple Logging Facade for Java (SLF4J) for these Logging frameworks in a class, we need declare for example as below:
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package com.huongdanjava.lombok; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class Example { public static final Logger LOGGER = LoggerFactory.getLogger(Example.class); public void print(String message) { LOGGER.info(message); } } |
But with Project Lombok, we don’t need to do that. When using Project… Read More
Normally, when we need to create an object with a lot of its information, we can use the Builder Pattern for that purpose. For example, I have a Student class as below:
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package com.huongdanjava.lombok; public class Student { private String firstName; private String middleName; private String lastName; private String country; public String getFirstName() { return firstName; } public void setFirstName(String firstName) { this.firstName = firstName; } public String getMiddleName() { return middleName; } public void setMiddleName(String middleName) { this.middleName = middleName; } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName; } public String getCountry() { return country; } public void setCountry(String country) { this.country = country; } @Override public String toString() { return "Student{" + "firstName='" + firstName + '\'' + ", middleName='" + middleName + '\'' + ", lastName='" + lastName + '\'' + ", country='" + country + '\'' + '}'; } } |
To build this object with all information using the Builder Pattern, we… Read More
In many situations working with Java object, we need define toString(), equals() or hashCode() method. These methods can be added to the Java object automatically by using Project Lombok. In this tutorial, I will show you all about this! First of all, we need a… Read More
