簡介¶
使用多個spring-AnnotationConfigApplicationContext
AnnotationConfigApplicationContext ctx01 = new AnnotationConfigApplicationContext();
AnnotationConfigApplicationContext ctx02 = new AnnotationConfigApplicationContext();
AnnotationConfigApplicationContext ctx03 = new AnnotationConfigApplicationContext();
/**
* Set the parent of this application context.
* <p>The parent {@linkplain ApplicationContext#getEnvironment() environment} is
* {@linkplain ConfigurableEnvironment#merge(ConfigurableEnvironment) merged} with
* this (child) application context environment if the parent is non-{@code null} and
* its environment is an instance of {@link ConfigurableEnvironment}.
* @see ConfigurableEnvironment#merge(ConfigurableEnvironment)
*/
@Override
public void setParent(@Nullable ApplicationContext parent) {
this.parent = parent;
if (parent != null) {
Environment parentEnvironment = parent.getEnvironment();
if (parentEnvironment instanceof ConfigurableEnvironment) {
getEnvironment().merge((ConfigurableEnvironment) parentEnvironment);
}
}
}
內容¶
public class ApplicationContextTest01 {
public static void main(String[] args) throws InterruptedException {
AnnotationConfigApplicationContext parentCtx = new AnnotationConfigApplicationContext();
parentCtx.setDisplayName("parentCtx");
AnnotationConfigApplicationContext childCtx = new AnnotationConfigApplicationContext();
childCtx.setDisplayName("childCtx");
AnnotationConfigApplicationContext childCtx2 = new AnnotationConfigApplicationContext();
childCtx2.setDisplayName("childCtx2");
parentCtx.registerBean(Config01.class);
childCtx.registerBean(Config02.class);
childCtx2.registerBean(Config03.class);
// parentCtx is ROOT CTX
childCtx.setParent(parentCtx); // parent-child
childCtx2.setParent(childCtx); // parent-child
parentCtx.refresh(); // parent
childCtx.refresh(); //child
childCtx2.refresh(); //child2
Car car = parentCtx.getBean(Car.class);
Dog dog = childCtx.getBean(Dog.class);
Egg egg = childCtx2.getBean(Egg.class);
System.out.println(car);
System.out.println(dog);
System.out.println(egg);
System.out.println("----子容器可以看到ROOT容器中定义的beans，反之不行------------");
// System.out.println(parentCtx.getBean(Car.class));
// System.out.println(parentCtx.getBean(Dog.class));
// System.out.println(parentCtx.getBean(Egg.class));
System.out.println(childCtx2.getBean(Car.class));
System.out.println(childCtx2.getBean(Dog.class));
System.out.println(childCtx2.getBean(Egg.class));
childCtx2.close();
}
}
public class ApplicationContextTest02 {
public static void main(String[] args) throws InterruptedException {
AnnotationConfigApplicationContext parentCtx = new AnnotationConfigApplicationContext(
Config01.class);// parentCtx is ROOT CTX
parentCtx.setDisplayName("parentCtx");
Car car = parentCtx.getBean(Car.class);
System.out.println(car);
System.out.println("parentCtx啟動完成，準備加入一個新的AnnotationConfigApplicationContext");
AnnotationConfigApplicationContext childCtx = new AnnotationConfigApplicationContext();
childCtx.setDisplayName("childCtx");
childCtx.registerBean(Config02.class);
childCtx.setParent(parentCtx); // parent-child
childCtx.refresh(); //child
Dog dog = childCtx.getBean(Dog.class);
System.out.println(dog);
System.out.println("childCtx啟動完成，準備加入一個新的AnnotationConfigApplicationContext");
AnnotationConfigApplicationContext childCtx2 = new AnnotationConfigApplicationContext();
childCtx2.setDisplayName("childCtx2");
childCtx2.registerBean(Config03.class);
childCtx2.setParent(childCtx); // parent-child
childCtx2.refresh(); //child2
Egg egg = childCtx2.getBean(Egg.class);
System.out.println(car);
System.out.println(dog);
System.out.println(egg);
System.out.println("----子容器可以看到根容器中定义的beans，反之不行------------");
// System.out.println(parentCtx.getBean(Car.class));
// System.out.println(parentCtx.getBean(Dog.class));
// System.out.println(parentCtx.getBean(Egg.class));
System.out.println(childCtx2.getBean(Car.class));
System.out.println(childCtx2.getBean(Dog.class));
System.out.println(childCtx2.getBean(Egg.class));
childCtx2.close();
System.out.println("把childCtx2 destroy 調用childCtx2.close()");
System.out.println("==============");
System.out.println(parentCtx.getDisplayName() + parentCtx.isActive());
System.out.println(childCtx.getDisplayName() + childCtx.isActive());
System.out.println(childCtx2.getDisplayName() + childCtx2.isActive());
System.out.println("==============");
System.out.println(childCtx.getDisplayName());
System.out.println(childCtx.getBean(Dog.class));
System.out.println("把childCtx存在Dog");
childCtx2.close();
System.out.println("把childCtx2 destroy 調用childCtx2.close()");
System.out.println(childCtx);
System.out.println(childCtx.getBean(Dog.class));
System.out.println("把childCtx存在Dog");
System.out.println("parentCtx destroy parentCtx.close()");
parentCtx.close();
System.out.println("==============");
System.out.println("parentCtx.isActive()" + " isActive= " + parentCtx.isActive());
System.out.println("childCtx.isActive()" + " isActive= " + childCtx.isActive());
System.out.println("childCtx2.isActive()" + " isActive= " + childCtx2.isActive());
System.out.println("==============");
System.out.println(childCtx.getBean(Dog.class));
System.out.println("把childCtx存在Dog");
childCtx2 = new AnnotationConfigApplicationContext();
parentCtx.setDisplayName("childCtx2");
childCtx2.registerBean(Config03.class);
childCtx2.setParent(childCtx); // parent-child
childCtx2.refresh(); //child2
System.out.println("==============");
System.out.println(parentCtx.getDisplayName() + " isActive= " + parentCtx.isActive());
System.out.println(childCtx.getDisplayName() + " isActive= " + childCtx.isActive());
System.out.println(childCtx2.getDisplayName() + " isActive= " + childCtx2.isActive());
System.out.println("==============");
System.out.println(childCtx2.getDisplayName());
System.out.println(childCtx2.getBean(Dog.class));
System.out.println(childCtx2.getBean(Egg.class));
System.out.println("把childCtx2存在Egg");
parentCtx = new AnnotationConfigApplicationContext();
parentCtx.registerBean(Config01.class);
parentCtx.setDisplayName("parentCtx");
parentCtx.setParent(childCtx2);
parentCtx.refresh();
System.out.println(parentCtx.getBean(Car.class));
System.out.println("==============");
System.out.println(parentCtx.getDisplayName() + " isActive= " + parentCtx.isActive());
System.out.println(childCtx.getDisplayName() + " isActive= " + childCtx.isActive());
System.out.println(childCtx2.getDisplayName() + " isActive= " + childCtx2.isActive());
System.out.println("==============");
}
}
@Configurable
public class Config01 {
@Bean
public Car car(){
return new Car();
}
}
@Configurable
public class Config02 {
@Bean public Dog dog() {
return new Dog();
}
}
@Configurable
public class Config03 {
@Bean
public Egg egg() {
return new Egg();
}
}
public class Car {
private int id;
private String name;
}
public class Dog {
private int id;
private String name;
}
public class Egg {
private int id;
private String name;
}