Response programming with the AREZ Annotations framework
Response programming with the AREZ Annotations framework
Arez is a Java library for building a response system. It provides a set of annotations and tools to simplify the implementation of response programming.Using the Arez Annotations framework, developers can easily build applications with data binding and state management functions.
In order to start using the ANNOTATATIONS framework, you need to add AREZ's dependencies to your project.You can add the following code to the build.gradle file:
groovy
dependencies {
implementation 'org.realityforge.arez:arez:0.13'
annotationProcessor 'org.realityforge.arez:arez-processor:0.13'
}
Once your project configuration is complete, you can use the AREZ framework to define the response attributes and observer.
First, add the annotation of `@arezcomponent` to your class to indicate that this class is an Arez component:
import arez.annotations.ArezComponent;
@ArezComponent
public class Counter {
// ...
}
Next, you can define the response attributes in this class, by adding `@observable` and@Action` Note:
import arez.annotations.Action;
import arez.annotations.Observable;
@ArezComponent
public class Counter {
private int count;
@Observable
public int getCount() {
return count;
}
@Action
public void setCount(int count) {
this.count = count;
}
@Action
public void increment() {
count++;
}
}
Now you can add an observer to other classes or components to monitor the changes in this response attribute.By adding `@autorun` annotations, you can specify a method that will automatically call when the response attribute changes:
import arez.annotations.ArezComponent;
import arez.annotations.Autorun;
import arez.annotations.Observable;
@ArezComponent
public class Counter {
private int count;
@Observable
public int getCount() {
return count;
}
@Action
public void setCount(int count) {
this.count = count;
}
@Action
public void increment() {
count++;
}
@Autorun
public void printCount() {
System.out.println("Count: " + getCount());
}
}
When you use the `setcount` method to change the count, the` propcount` method will automatically call and output new counts.This is a simple example of response programming implemented by the Arez framework.
In addition to the above examples, the Arez framework also provides more functions, such as tracking dependency relationships, transactional behavior and batch processing.You can check the official document of Arez to learn more details and usage examples.
Summary: By using the Arez Annotations framework, you can easily implement responsive programming.State the response attributes and observers, and use the annotation to from the motion processing state change and dependencies.This makes it easier to write maintenance and efficient response applications.
