Java Skeleton类代码示例

import java.rmi.server.Skeleton; //导入依赖的package包/类
/**
 * Loads and instantiates skel class for the given remote class.
 *
 * @param c Class whose skel should be loaded and instantiated
 *
 * @return created skel class or null if any Exception occurred during
 *         skel loading or instantiating
 */
protected Skeleton getSkelInstance(Class c) {
    String skelName = c.getName() + "_Skel"; //$NON-NLS-1$
    ClassLoader cl = c.getClassLoader();

    try {
        Class skelClass;

        if (cl != null) {
            skelClass = cl.loadClass(skelName);
        } else {
            skelClass = Class.forName(skelName);
        }
        return (Skeleton) skelClass.newInstance();
    } catch (Exception ex) {
    }
    return null;
}
 

import java.rmi.server.Skeleton; //导入依赖的package包/类
/**
 * Export object and ensure it is present in the server activation table as
 * well.
 *
 * @param aClass the class being exported, must implement Remote.
 */
public Remote exportClass(Class aClass) throws RemoteException
{
  if (!Remote.class.isAssignableFrom(aClass))
    throw new InternalError(aClass.getName()+" must implement Remote");

      String ignoreStubs;

      ClassLoader loader =aClass.getClassLoader();

      // Stubs are always searched for the bootstrap classes that may have
      // obsolete pattern and may still need also skeletons.
      if (loader==null)
        ignoreStubs = "false";
      else
        ignoreStubs = System.getProperty("java.rmi.server.ignoreStubClasses",
                                         "false");

      if (! ignoreStubs.equals("true"))
        {
          // Find and install the stub
          Class cls = aClass;

          // where ist the _Stub? (check superclasses also)
          Class expCls = findStubSkelClass(cls);

          if (expCls != null)
            {
              stub = (RemoteStub) getHelperClass(expCls, "_Stub");
              // Find and install the skeleton (if there is one)
              skel = (Skeleton) getHelperClass(expCls, "_Skel");
            }
        }

      if (stub == null)
        stub = createProxyStub(aClass, this);

      // Build hash of methods which may be called.
      buildMethodHash(aClass, true);

  UnicastServer.registerActivatable(this);
  return stub;
}
 

import java.rmi.server.Skeleton; //导入依赖的package包/类
/**
 * Export the object and return its remote stub. The method tries to locate
 * existing stubs and skeletons. If this fails, the method instantiates the
 * proxy stub class.
 *
 * Stubs and skeletons are always ignored (even if present) if the
 * java.rmi.server.ignoreStubClasses property is set to true.
 *
 * @param obj the object being exported.
 * @return the stub (existing class or proxy) of the exported object.
 * @throws RemoteException if the export failed due any reason
 */
public Remote exportObject(Remote obj) throws RemoteException
{
  if (myself == null)
    {
      myself = obj;
      // Save it to server manager, to let client calls in the same VM to
      // issue local call
      manager.serverobj = obj;

      String ignoreStubs;

      ClassLoader loader =obj.getClass().getClassLoader();

      // Stubs are always searched for the bootstrap classes that may have
      // obsolete pattern and may still need also skeletons.
      if (loader==null)
        ignoreStubs = "false";
      else
        ignoreStubs = System.getProperty("java.rmi.server.ignoreStubClasses",
                                         "false");

      if (! ignoreStubs.equals("true"))
        {
          // Find and install the stub
          Class cls = obj.getClass();

          // where ist the _Stub? (check superclasses also)
          Class expCls = findStubSkelClass(cls);

          if (expCls != null)
            {
              stub = (RemoteStub) getHelperClass(expCls, "_Stub");
              // Find and install the skeleton (if there is one)
              skel = (Skeleton) getHelperClass(expCls, "_Skel");
            }
        }

      if (stub == null)
        stub = createProxyStub(obj.getClass(), this);

      // Build hash of methods which may be called.
      buildMethodHash(obj.getClass(), true);

      // Export it.
      UnicastServer.exportObject(this);
    }

  return stub;
}
 

import java.rmi.server.Skeleton; //导入依赖的package包/类
/**
 * Export object and ensure it is present in the server activation table as
 * well.
 * 
 * @param aClass the class being exported, must implement Remote.
 */
public Remote exportClass(Class aClass) throws RemoteException
{
  if (!Remote.class.isAssignableFrom(aClass))
    throw new InternalError(aClass.getName()+" must implement Remote");

      String ignoreStubs;
      
      ClassLoader loader =aClass.getClassLoader(); 
      
      // Stubs are always searched for the bootstrap classes that may have
      // obsolete pattern and may still need also skeletons.
      if (loader==null)
        ignoreStubs = "false";
      else
        ignoreStubs = System.getProperty("java.rmi.server.ignoreStubClasses", 
                                         "false");
      
      if (! ignoreStubs.equals("true"))
        {
          // Find and install the stub
          Class cls = aClass;

          // where ist the _Stub? (check superclasses also)
          Class expCls = findStubSkelClass(cls);

          if (expCls != null)
            {
              stub = (RemoteStub) getHelperClass(expCls, "_Stub");
              // Find and install the skeleton (if there is one)
              skel = (Skeleton) getHelperClass(expCls, "_Skel");
            }
        }

      if (stub == null)
        stub = createProxyStub(aClass, this);

      // Build hash of methods which may be called.
      buildMethodHash(aClass, true);

  UnicastServer.registerActivatable(this);
  return stub;
}
 

import java.rmi.server.Skeleton; //导入依赖的package包/类
/**
 * Export the object and return its remote stub. The method tries to locate
 * existing stubs and skeletons. If this fails, the method instantiates the
 * proxy stub class.
 * 
 * Stubs and skeletons are always ignored (even if present) if the 
 * java.rmi.server.ignoreStubClasses property is set to true.
 * 
 * @param obj the object being exported.
 * @return the stub (existing class or proxy) of the exported object.
 * @throws RemoteException if the export failed due any reason
 */
public Remote exportObject(Remote obj) throws RemoteException
{
  if (myself == null)
    {
      myself = obj;
      // Save it to server manager, to let client calls in the same VM to
      // issue local call
      manager.serverobj = obj;

      String ignoreStubs;
      
      ClassLoader loader =obj.getClass().getClassLoader(); 
      
      // Stubs are always searched for the bootstrap classes that may have
      // obsolete pattern and may still need also skeletons.
      if (loader==null)
        ignoreStubs = "false";
      else
        ignoreStubs = System.getProperty("java.rmi.server.ignoreStubClasses", 
                                         "false");
      
      if (! ignoreStubs.equals("true"))
        {
          // Find and install the stub
          Class cls = obj.getClass();

          // where ist the _Stub? (check superclasses also)
          Class expCls = findStubSkelClass(cls);

          if (expCls != null)
            {
              stub = (RemoteStub) getHelperClass(expCls, "_Stub");
              // Find and install the skeleton (if there is one)
              skel = (Skeleton) getHelperClass(expCls, "_Skel");
            }
        }

      if (stub == null)
        stub = createProxyStub(obj.getClass(), this);

      // Build hash of methods which may be called.
      buildMethodHash(obj.getClass(), true);

      // Export it.
      UnicastServer.exportObject(this);
    }

  return stub;
}