osgi blueprint如何在bundle中读取资源文件

Question

我使用osgi和blueprint,我搜索如何读取我的包中的文件？如:mybundle

• file.json
• OSGI-INF /蓝图/ blueprint.xml
• WEB-INF
• *

我想在myservice中读取file.json.

Answer 1

要做到这一点,简单的方法是在bean中注入bundlecontext

blueprint.xml

<bean id="plugin" class="com.timactive.MyBean" init-method="start">
    <property name="bcontext" ref="blueprintBundleContext"></property>
 </bean>

可能的参考:

blueprintBundle 提供bundle的Bundle对象.

blueprintBundleContext 提供bundle的BundleContext对象.

blueprintContainer 为包提供BlueprintContainer对象.

blueprintConverter 为bundle提供Converter对象,该对象提供对Blueprint Container类型转换工具的访问.类型转换有更多信息.来源:http://www.ibm.com/developerworks/opensource/library/os-osgiblueprint/

在你的班上:

import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext
public class MyBean  {

    public BundleContext bcontext;
    public boolean start(){
    try {
    Bundle bundle = bcontext.getBundle();
    InputStream is = bundle.getEntry("/file.json").openStream();
    String jsondb =  readFile(is);

    } catch (IOException e) {
                LOG.error("The file treefield.json not found", e);
                return(false);
            }

        }

        return(true);
    }

    private String readFile(InputStream is ) throws IOException {
        java.util.Scanner s = new java.util.Scanner(is).useDelimiter("\\A");
        return s.hasNext() ? s.next() : "";
   }
   public void setBcontext(BundleContext bcontext) {
    this.bcontext = bcontext;
}