用蓝图布线原型 [英] Wiring a prototype in blueprint

问题描述

像Spring一样，蓝图支持原型范围.但是与Spring不同，我看不到任何有关如何使用它的文档.

Like Spring, blueprint supports the prototype scope. But unlike Spring I can't see any documentation about how to use it.

在春季，您可以要求上下文为您提供一个新bean，在蓝图"世界中有什么等效功能?

In Spring you can ask the context to give you a new bean, what's the equivalent in the Blueprint world?

推荐答案

BlueprintContainer.getComponentInstance()确实可以满足您的需求.

BlueprintContainer.getComponentInstance() does exactly what you are looking for.

osgi文档:

蓝图容器代表蓝图的托管状态 捆.蓝图容器提供对所有托管对象的访问 成分.这些是bean，服务和服务引用.一种 可以通过注入预定义的容器来获得蓝图容器" "blueprintContainer"组件ID.

A Blueprint Container represents the managed state of a Blueprint bundle. A Blueprint Container provides access to all managed components. These are the beans, services, and service references. A Blueprint Container can be obtained by injecting the predefined "blueprintContainer" component id.

示例

blueprint.xml:

<!-- blueprintContainer is predefined component here -->
<bean id="myService" class="myPackage.MyService">
   <property name="container" ref="blueprintContainer"/>
</bean>
<!-- prototype which can be created from myService -->
<bean id="myPrototype" class="myPackage.MyPrototype" scope="prototype"/>

MyService.java:

// ...
// create new instance
MyPrototype myPrototype = 
     (MyPrototype) container.getComponentInstance("myPrototype");

pom.xml:

<!-- BlueprintContainer from Apache Aries-->
<dependency>
  <groupId>org.apache.aries.blueprint</groupId>
  <artifactId>org.apache.aries.blueprint.core</artifactId>
  <version>1.3.0</version>
</dependency>

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