偶也研究OSGi了之一

偶也开始研究OSGi了，这东西真不错。不过官方的OSGi标准包太大了，前两天偶根据规范实现了其Module Layer部分并根据大家提到的一些不足，增加了自定义ClassPath和NativeCode的功能，这下应该可以用在基于Spring的Webapp上了～

不多说了，看看测试代码吧：

java 代码

public class TFramework extends TestCase {

  private Framework framework;

  public void setUp() {
    framework = new Framework();
    framework.addFrameworkListener(new IFrameworkListener() {
      public void frameworkEvent(IFrameworkEvent event) {
        if (event.getMessage() != null) {
          System.out.println(event.getMessage());
        }
        if (event.getThrowable() != null) {
          event.getThrowable().printStackTrace();
        }
      }
    });
  }

  public void tearDown() {
    framework = null;
    System.out.println();
  }

  public void testBundle() throws Exception {

    framework.addClassPath("C:\\osgi\\ws\\commons-logging.jar");
    framework.addLibraryPath("C:\\osgi\\os");

    // ----------------------------------------------
    // Bundle-SymbolicName: com.yipsilon.osgi.test
    // Bundle-Version: 1.0.0.20061212
    // Bundle-NativeCode: swt-gdip-win32-3235.dll,swt-awt-win32-3235.dll,swt-wgl-win32-3235.dll,swt-win32-3235.dll
    // Bundle-Activator: com.yipsilon.osgi.test.Activator
    // Export-Package: com.yipsilon.osgi.test
    // Import-Package: org.apache.commons.logging
    // Bundle-ClassPath: swt.3.2.1.v3235.jar
    // ----------------------------------------------

    framework.installBundle("C:\\osgi\\test.jar");

    ClassLoader cl = framework.getClassLoader();

    URL explicitURL = cl.getResource("com/yipsilon/osgi/test/Test.class");
    URL implicitURL = cl.getResource("com/yipsilon/osgi/test1/Hello.class");
    URL externalURL = cl.getResource("org/apache/commons/logging/LogFactory.class");

    System.out.println("implicitURL: " + (implicitURL != null));  // Returns true
    System.out.println("explicitURL: " + (explicitURL != null)); // Returns true
    System.out.println("externalURL: " + (externalURL != null)); // Returns true

    Class explicitClass = cl.loadClass("com.yipsilon.osgi.test.Test");
    Class implicitClass = cl.loadClass("com.yipsilon.osgi.test1.Hello");
    Class externalClass = cl.loadClass("org.apache.commons.logging.LogFactory");

    System.out.println("implicitClass: " + (implicitClass != null)); // Returns false
    System.out.println("explicitClass: " + (explicitClass != null)); // Returns true
    System.out.println("externalClass: " + (externalClass != null)); // Returns true
  }
}

看完了知道这东西该怎么用了吧... 嘿嘿！！

不过要真正实现Webapp功能，还需要加一些东西，这些稍后我会开发出来～～进度的快慢全凭偶的空闲时间的多少... faint

PS：怎么附件加不进去呐？？才1.5MB而已....

评论

1 楼 shaucle 2006-12-28  

很不错的东东,i like it!