1.去除refer.autodestory开关 ：nofify的逻辑变得复杂了，此开关开启的情况下可能会造成invoker资源泄漏.

DUBBO-22
2.补充testcase

git-svn-id: http://code.alibabatech.com/svn/dubbo/trunk@160 1a56cb94-b969-4eaa-88fa-be21384802f2

dubbo-registry-default/src/test/java/com/alibaba/dubbo/registry/dubbo/RegistryDirectoryTest.java

@@ -28,7 +28,6 @@ import javax.script.ScriptEngineManager;
 import junit.framework.Assert;
 
 import org.junit.Before;
-import org.junit.Ignore;
 import org.junit.Test;
 
 import com.alibaba.dubbo.common.Constants;
@@ -122,32 +121,6 @@ public class RegistryDirectoryTest {
         testforbid(registryDirectory);
     }
     @Test
-    @Ignore //FIXME
-    public void testNotified_CloseAutoDestroy() {
-        RegistryDirectory registryDirectory = getRegistryDirectory();
-        List<URL> serviceUrls = new ArrayList<URL> ();
-        serviceUrls.add(SERVICEURL);
-        serviceUrls.add(SERVICEURL2);
-        registryDirectory.notify(serviceUrls);
-        invocation = new RpcInvocation();
-        
-        List<Invoker> invokers = registryDirectory.list(invocation);
-        Assert.assertEquals(true,invokers.get(0).isAvailable());
-        Assert.assertEquals(true,invokers.get(1).isAvailable());
-        
-        serviceUrls = new ArrayList<URL> ();
-        serviceUrls.add(SERVICEURL2.addParameter(RpcConstants.REFER_AUTODESTROY_KEY, false));
-        registryDirectory.notify(serviceUrls);
-        Assert.assertEquals(true,invokers.get(0).isAvailable());
-        Assert.assertEquals(true,invokers.get(1).isAvailable());
-        
-        serviceUrls = new ArrayList<URL> ();
-        serviceUrls.add(SERVICEURL2);
-        registryDirectory.notify(serviceUrls);
-        Assert.assertEquals(false,invokers.get(0).isAvailable());
-        Assert.assertEquals(true,invokers.get(1).isAvailable());
-    }
-    @Test
     public void testNotified_WithError() {
         RegistryDirectory registryDirectory = getRegistryDirectory();
         List<URL> serviceUrls = new ArrayList<URL> ();

dubbo-registry/src/main/java/com/alibaba/dubbo/registry/support/RegistryDirectory.java

@@ -316,7 +316,7 @@ public class RegistryDirectory<T> extends AbstractDirectory<T> implements Notify
         }
         methodInvokerMap = null;
     }
-
+    
     /**
      * 检查缓存中的invoker是否需要被destroy
      * 如果url中指定refer.autodestroy=false，则只增加不减少，可能会有refer泄漏，
@@ -328,21 +328,6 @@ public class RegistryDirectory<T> extends AbstractDirectory<T> implements Notify
             destroyAllInvokers();
             return;
         }
-        boolean autodestroy = true ;
-        // 如果URL中指定了autodestroy=false，则不关闭旧的连接
-        for(Invoker<T> invoker : newUrlInvokerMap.values() ){
-            if (invoker != null && invoker.getUrl() != null){
-                autodestroy = invoker.getUrl().getParameter(RpcConstants.REFER_AUTODESTROY_KEY, true);
-            }
-            break;
-        }
-        if(! autodestroy) {
-            if(logger.isWarnEnabled()) {
-                logger.warn("url.param["+RpcConstants.REFER_AUTODESTROY_KEY+"=false] is false. may have reference leak. recommend(default) true");
-            }
-            return;
-        }
-        
         // check deleted invoker
         List<String> deleted = null;
         if (oldUrlInvokerMap != null) {

dubbo-rpc/src/main/java/com/alibaba/dubbo/rpc/RpcConstants.java

@@ -170,8 +170,6 @@ public final class RpcConstants {
     
     public static final String STUB_EVENT_METHODS_KEY = "dubbo.stub.event.methods";
     
-    public static final String REFER_AUTODESTROY_KEY = "refer.autodestroy";
-    
     private RpcConstants() {}
     
 }
\ No newline at end of file