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

/*
 * Copyright 1999-2011 Alibaba Group.
 *  
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.dubbo.registry.dubbo;

import static org.junit.Assert.fail;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CountDownLatch;

import javax.script.ScriptEngineManager;

import junit.framework.Assert;

import org.junit.Before;
import org.junit.Test;

import com.alibaba.dubbo.common.Constants;
import com.alibaba.dubbo.common.URL;
import com.alibaba.dubbo.common.extension.ExtensionLoader;
import com.alibaba.dubbo.common.utils.LogUtil;
import com.alibaba.dubbo.registry.NotifyListener;
import com.alibaba.dubbo.registry.Registry;
import com.alibaba.dubbo.registry.RegistryFactory;
import com.alibaba.dubbo.registry.support.RegistryDirectory;
import com.alibaba.dubbo.rpc.Invoker;
import com.alibaba.dubbo.rpc.Protocol;
import com.alibaba.dubbo.rpc.RpcException;
import com.alibaba.dubbo.rpc.RpcInvocation;
import com.alibaba.dubbo.rpc.cluster.Router;
import com.alibaba.dubbo.rpc.cluster.loadbalance.LeastActiveLoadBalance;
import com.alibaba.dubbo.rpc.cluster.loadbalance.RoundRobinLoadBalance;
import com.alibaba.dubbo.rpc.cluster.router.ScriptRouter;
import com.alibaba.dubbo.rpc.cluster.router.ScriptRouterFactory;

@SuppressWarnings({ "rawtypes", "unchecked" })
public class RegistryDirectoryTest {

    RegistryFactory registryFactory         = ExtensionLoader.getExtensionLoader(RegistryFactory.class).getAdaptiveExtension();
    Protocol        protocol                = ExtensionLoader.getExtensionLoader(Protocol.class).getAdaptiveExtension();
    String          service                 = DemoService.class.getName();
    RpcInvocation   invocation              = new RpcInvocation();

    URL             noMeaningUrl            = URL.valueOf("notsupport:/" + service+"?interface="+service);
    URL             SERVICEURL              = URL.valueOf("dubbo://127.0.0.1:9091/" + service + "?lazy=true");
    URL             SERVICEURL2             = URL.valueOf("dubbo://127.0.0.1:9092/" + service + "?lazy=true");
    URL             SERVICEURL3             = URL.valueOf("dubbo://127.0.0.1:9093/" + service + "?lazy=true");
    URL             SERVICEURL_DUBBO_NOPATH = URL.valueOf("dubbo://127.0.0.1:9092" + "?lazy=true");

    @Before
    public void setUp() {
    }

    private RegistryDirectory getRegistryDirectory(URL url) {
        RegistryDirectory registryDirectory = new RegistryDirectory(URL.class, url);
        registryDirectory.setProtocol(protocol);
        // asert empty
        List invokers = registryDirectory.list(invocation);
        Assert.assertEquals(0, invokers.size());
        Assert.assertEquals(false, registryDirectory.isAvailable());
        return registryDirectory;
    }

    private RegistryDirectory getRegistryDirectory() {
        return getRegistryDirectory(noMeaningUrl);
    }

    @Test
    public void test_Constructor_WithErrorParam() {
        try {
            new RegistryDirectory(null, null);
            fail();
        } catch (IllegalArgumentException e) {

        }
        try {
            // null url
            new RegistryDirectory(null, noMeaningUrl);
            fail();
        } catch (IllegalArgumentException e) {

        }
        try {
            // no servicekey
            new RegistryDirectory(RegistryDirectoryTest.class, URL.valueOf("dubbo://10.20.30.40:9090"));
            fail();
        } catch (IllegalArgumentException e) {

        }
    }

    @Test
    public void test_Constructor_CheckStatus() throws Exception {
        URL url = URL.valueOf("notsupported://10.20.30.40/" + service + "?a=b").addParameterAndEncoded(Constants.REFER_KEY,
                                                                                                       "foo=bar");
        RegistryDirectory reg = getRegistryDirectory(url);
        Field field = reg.getClass().getDeclaredField("queryMap");
        field.setAccessible(true);
        Map<String, String> queryMap = (Map<String, String>) field.get(reg);
        Assert.assertEquals("bar", queryMap.get("foo"));
        Assert.assertEquals(url.removeParameter(Constants.REFER_KEY).addParameter("foo", "bar"), reg.getUrl());
    }

    @Test
    public void testNotified_Normal() {
        RegistryDirectory registryDirectory = getRegistryDirectory();
        test_Notified2invokers(registryDirectory);
        test_Notified1invokers(registryDirectory);
        test_Notified3invokers(registryDirectory);
        testforbid(registryDirectory);
    }
    
    /**
     * 测试推送只有router的情况
     */
    @Test
    public void testNotified_Normal_withRouters() {
        LogUtil.start();
        RegistryDirectory registryDirectory = getRegistryDirectory();
        test_Notified1invokers(registryDirectory);
        test_Notified_only_routes(registryDirectory);
        Assert.assertEquals(true, registryDirectory.isAvailable());
        Assert.assertTrue("notify no invoker urls ,should not error", LogUtil.checkNoError());
        LogUtil.stop();
        test_Notified2invokers(registryDirectory);
        
    }

    @Test
    public void testNotified_WithError() {
        RegistryDirectory registryDirectory = getRegistryDirectory();
        List<URL> serviceUrls = new ArrayList<URL>();
        // ignore error log
        URL badurl = URL.valueOf("notsupported://127.0.0.1/" + service);
        serviceUrls.add(badurl);
        serviceUrls.add(SERVICEURL);

        registryDirectory.notify(serviceUrls);
        Assert.assertEquals(true, registryDirectory.isAvailable());
        List invokers = registryDirectory.list(invocation);
        Assert.assertEquals(1, invokers.size());
    }

    @Test
    public void testNotified_WithDuplicateUrls() {
        List<URL> serviceUrls = new ArrayList<URL>();
        // ignore error log
        serviceUrls.add(SERVICEURL);
        serviceUrls.add(SERVICEURL);

        RegistryDirectory registryDirectory = getRegistryDirectory();
        registryDirectory.notify(serviceUrls);
        List invokers = registryDirectory.list(invocation);
        Assert.assertEquals(1, invokers.size());
    }

    // forbid
    private void testforbid(RegistryDirectory registryDirectory) {
        invocation = new RpcInvocation();
        List<URL> serviceUrls = new ArrayList<URL>();
        registryDirectory.notify(serviceUrls);
        Assert.assertEquals("invokers size=0 ,then the registry directory is not available", false,
                            registryDirectory.isAvailable());
        try {
            registryDirectory.list(invocation);
            fail("forbid must throw RpcException");
        } catch (RpcException e) {
            Assert.assertEquals(RpcException.FORBIDDEN_EXCEPTION, e.getCode());
        }
    }

    //测试调用和registry url的path无关
    @Test
    public void test_NotifiedDubbo1() {
        URL             errorPathUrl            = URL.valueOf("notsupport:/" + "xxx"+"?interface="+service);
        RegistryDirectory registryDirectory = getRegistryDirectory(errorPathUrl);
        List<URL> serviceUrls = new ArrayList<URL>();
        URL Dubbo1URL = URL.valueOf("dubbo://127.0.0.1:9098?lazy=true");
        serviceUrls.add(Dubbo1URL.addParameter("methods", "getXXX"));
        registryDirectory.notify(serviceUrls);
        Assert.assertEquals(true, registryDirectory.isAvailable());

        invocation = new RpcInvocation();

        List<Invoker<DemoService>> invokers = registryDirectory.list(invocation);
        Assert.assertEquals(1, invokers.size());

        invocation.setMethodName("getXXX");
        invokers = registryDirectory.list(invocation);
        Assert.assertEquals(1, invokers.size());
        Assert.assertEquals(DemoService.class.getName(), invokers.get(0).getUrl().getPath());
    }

    // notify one invoker
    private void test_Notified_only_routes(RegistryDirectory registryDirectory) {
        List<URL> serviceUrls = new ArrayList<URL>();
        serviceUrls.add(URL.valueOf("route://127.0.0.1/?router=clean"));
        registryDirectory.notify(serviceUrls);
    }
    // notify one invoker
    private void test_Notified1invokers(RegistryDirectory registryDirectory) {

        List<URL> serviceUrls = new ArrayList<URL>();
        serviceUrls.add(SERVICEURL.addParameter("methods", "getXXX1"));// .addParameter("refer.autodestroy", "true")
        registryDirectory.notify(serviceUrls);
        Assert.assertEquals(true, registryDirectory.isAvailable());

        invocation = new RpcInvocation();

        List invokers = registryDirectory.list(invocation);
        Assert.assertEquals(1, invokers.size());

        invocation.setMethodName("getXXX");
        invokers = registryDirectory.list(invocation);
        Assert.assertEquals(1, invokers.size());

        invocation.setMethodName("getXXX1");
        invokers = registryDirectory.list(invocation);
        Assert.assertEquals(1, invokers.size());

        invocation.setMethodName("getXXX2");
        invokers = registryDirectory.list(invocation);
        Assert.assertEquals(1, invokers.size());
    }

    // 两个invoker===================================
    private void test_Notified2invokers(RegistryDirectory registryDirectory) {
        List<URL> serviceUrls = new ArrayList<URL>();
        serviceUrls.add(SERVICEURL.addParameter("methods", "getXXX1"));
        serviceUrls.add(SERVICEURL2.addParameter("methods", "getXXX1,getXXX2"));
        serviceUrls.add(SERVICEURL2.addParameter("methods", "getXXX1,getXXX2"));

        registryDirectory.notify(serviceUrls);
        Assert.assertEquals(true, registryDirectory.isAvailable());

        invocation = new RpcInvocation();

        List invokers = registryDirectory.list(invocation);
        Assert.assertEquals(2, invokers.size());

        invocation.setMethodName("getXXX");
        invokers = registryDirectory.list(invocation);
        Assert.assertEquals(2, invokers.size());

        invocation.setMethodName("getXXX1");
        invokers = registryDirectory.list(invocation);
        Assert.assertEquals(2, invokers.size());

        invocation.setMethodName("getXXX2");
        invokers = registryDirectory.list(invocation);
        Assert.assertEquals(1, invokers.size());
    }

    // 通知成3个invoker===================================
    private void test_Notified3invokers(RegistryDirectory registryDirectory) {
        List<URL> serviceUrls = new ArrayList<URL>();
        serviceUrls.add(SERVICEURL.addParameter("methods", "getXXX1"));
        serviceUrls.add(SERVICEURL2.addParameter("methods", "getXXX1,getXXX2"));
        serviceUrls.add(SERVICEURL3.addParameter("methods", "getXXX1,getXXX2,getXXX3"));

        registryDirectory.notify(serviceUrls);
        Assert.assertEquals(true, registryDirectory.isAvailable());

        invocation = new RpcInvocation();

        List invokers = registryDirectory.list(invocation);
        Assert.assertEquals(3, invokers.size());

        invocation.setMethodName("getXXX");
        invokers = registryDirectory.list(invocation);
        Assert.assertEquals(3, invokers.size());

        invocation.setMethodName("getXXX1");
        invokers = registryDirectory.list(invocation);
        Assert.assertEquals(3, invokers.size());

        invocation.setMethodName("getXXX2");
        invokers = registryDirectory.list(invocation);
        Assert.assertEquals(2, invokers.size());

        invocation.setMethodName("getXXX3");
        invokers = registryDirectory.list(invocation);
        Assert.assertEquals(1, invokers.size());
    }

    @Test
    public void testParametersMerge() {
        RegistryDirectory registryDirectory = getRegistryDirectory();
        URL regurl = noMeaningUrl.addParameter("test", "reg").addParameterAndEncoded(Constants.REFER_KEY,
                                                                                     "key=query&"
                                                                                             + Constants.LOADBALANCE_KEY
                                                                                             + "="
                                                                                             + LeastActiveLoadBalance.NAME);
        RegistryDirectory<RegistryDirectoryTest> registryDirectory2 = new RegistryDirectory(
                                                                                            RegistryDirectoryTest.class,
                                                                                            regurl);
        registryDirectory2.setProtocol(protocol);

        List<URL> serviceUrls = new ArrayList<URL>();
        // 检验注册中心的参数需要被清除
        {
            serviceUrls.clear();
            serviceUrls.add(SERVICEURL.addParameter("methods", "getXXX1"));
            registryDirectory.notify(serviceUrls);

            invocation = new RpcInvocation();
            List invokers = registryDirectory.list(invocation);

            Invoker invoker = (Invoker) invokers.get(0);
            URL url = invoker.getUrl();
            Assert.assertEquals(null, url.getParameter("key"));
        }
        // 检验服务提供方的参数需要merge
        {
            serviceUrls.clear();
            serviceUrls.add(SERVICEURL.addParameter("methods", "getXXX2").addParameter("key", "provider"));

            registryDirectory.notify(serviceUrls);
            invocation = new RpcInvocation();
            List invokers = registryDirectory.list(invocation);

            Invoker invoker = (Invoker) invokers.get(0);
            URL url = invoker.getUrl();
            Assert.assertEquals("provider", url.getParameter("key"));
        }
        // 检验服务query的参数需要与providermerge 。
        {
            serviceUrls.clear();
            serviceUrls.add(SERVICEURL.addParameter("methods", "getXXX3").addParameter("key", "provider"));

            registryDirectory2.notify(serviceUrls);
            invocation = new RpcInvocation();
            List invokers = registryDirectory2.list(invocation);

            Invoker invoker = (Invoker) invokers.get(0);
            URL url = invoker.getUrl();
            Assert.assertEquals("query", url.getParameter("key"));
        }

        {
            serviceUrls.clear();
            serviceUrls.add(SERVICEURL.addParameter("methods", "getXXX1"));
            registryDirectory.notify(serviceUrls);

            invocation = new RpcInvocation();
            List invokers = registryDirectory.list(invocation);

            Invoker invoker = (Invoker) invokers.get(0);
            URL url = invoker.getUrl();
            Assert.assertEquals(false, url.getParameter(Constants.CHECK_KEY, false));
        }
        {
            serviceUrls.clear();
            serviceUrls.add(SERVICEURL.addParameter(Constants.LOADBALANCE_KEY, RoundRobinLoadBalance.NAME));
            registryDirectory2.notify(serviceUrls);

            invocation = new RpcInvocation();
            invocation.setMethodName("get");
            List invokers = registryDirectory2.list(invocation);

            Invoker invoker = (Invoker) invokers.get(0);
            URL url = invoker.getUrl();
            Assert.assertEquals(LeastActiveLoadBalance.NAME, url.getMethodParameter("get", Constants.LOADBALANCE_KEY));
        }
        //test geturl
        {
        	Assert.assertEquals(null, registryDirectory2.getUrl().getParameter("mock"));
            serviceUrls.clear();
            serviceUrls.add(SERVICEURL.addParameter(Constants.MOCK_KEY, "true"));
            registryDirectory2.notify(serviceUrls);

            Assert.assertEquals("true", registryDirectory2.getUrl().getParameter("mock"));
        }
    }

    /**
     * When destroying, RegistryDirectory should: 1. be disconnected from Registry 2. destroy all invokers
     */
    @Test
    public void testDestroy() {
        RegistryDirectory registryDirectory = getRegistryDirectory();

        List<URL> serviceUrls = new ArrayList<URL>();
        serviceUrls.add(SERVICEURL.addParameter("methods", "getXXX1"));
        serviceUrls.add(SERVICEURL2.addParameter("methods", "getXXX1,getXXX2"));
        serviceUrls.add(SERVICEURL3.addParameter("methods", "getXXX1,getXXX2,getXXX3"));

        registryDirectory.notify(serviceUrls);
        List<Invoker> invokers = registryDirectory.list(invocation);
        Assert.assertEquals(true, registryDirectory.isAvailable());
        Assert.assertEquals(true, invokers.get(0).isAvailable());

        registryDirectory.destroy();
        Assert.assertEquals(false, registryDirectory.isAvailable());
        Assert.assertEquals(false, invokers.get(0).isAvailable());
        registryDirectory.destroy();

        Map<String, List<Invoker<RegistryDirectoryTest>>> methodInvokerMap = registryDirectory.getMethodInvokerMap();
        Map<String, Invoker<RegistryDirectoryTest>> urlInvokerMap = registryDirectory.getUrlInvokerMap();

        Assert.assertTrue(methodInvokerMap == null);
        Assert.assertEquals(0, urlInvokerMap.size());
        // List<U> urls = mockRegistry.getSubscribedUrls();

        RpcInvocation inv = new RpcInvocation();
        try {
            registryDirectory.list(inv);
            fail();
        } catch (RpcException e) {
            Assert.assertTrue(e.getMessage().contains("already destroyed"));
        }
    }

    @Test
    public void testDestroy_WithDestroyRegistry() {
        RegistryDirectory registryDirectory = getRegistryDirectory();
        CountDownLatch latch = new CountDownLatch(1);
        registryDirectory.setRegistry(new MockRegistry(latch));
        registryDirectory.destroy();
        Assert.assertEquals(0, latch.getCount());
    }

    @Test
    public void testDestroy_WithDestroyRegistry_WithError() {
        RegistryDirectory registryDirectory = getRegistryDirectory();
        registryDirectory.setRegistry(new MockRegistry(true));
        registryDirectory.destroy();
    }

    @Test
    public void testDubbo1UrlWithGenericInvocation() {

        RegistryDirectory registryDirectory = getRegistryDirectory();

        List<URL> serviceUrls = new ArrayList<URL>();
        URL serviceURL = SERVICEURL_DUBBO_NOPATH.addParameter("methods", "getXXX1,getXXX2,getXXX3");
        serviceUrls.add(serviceURL);

        registryDirectory.notify(serviceUrls);

        // Object $invoke(String method, String[] parameterTypes, Object[] args) throws GenericException;
        invocation = new RpcInvocation(Constants.$INVOKE, new Class[] { String.class, String[].class, Object[].class },
                                       new Object[] { "getXXX1", "", new Object[] {} });

        List<Invoker> invokers = registryDirectory.list(invocation);

        Assert.assertEquals(1, invokers.size());
        Assert.assertEquals(serviceURL.setPath(service).addParameter("check", "false"), invokers.get(0).getUrl());

    }

    enum Param {
        MORGAN,
    };

    /**
     * When the first arg of a method is String or Enum, Registry server can do parameter-value-based routing.
     */
    @Test
    public void testParmeterRoute() {
        RegistryDirectory registryDirectory = getRegistryDirectory();
        List<URL> serviceUrls = new ArrayList<URL>();
        serviceUrls.add(SERVICEURL.addParameter("methods", "getXXX1.napoli"));
        serviceUrls.add(SERVICEURL2.addParameter("methods", "getXXX1.MORGAN,getXXX2"));
        serviceUrls.add(SERVICEURL3.addParameter("methods", "getXXX1.morgan,getXXX2,getXXX3"));

        registryDirectory.notify(serviceUrls);

        invocation = new RpcInvocation(
                                       Constants.$INVOKE,
                                       new Class[] { String.class, String[].class, Object[].class },
                                       new Object[] { "getXXX1", new String[] { "Enum" }, new Object[] { Param.MORGAN } });

        List invokers = registryDirectory.list(invocation);
        Assert.assertEquals(1, invokers.size());
    }

    /**
     * Empty notify cause forbidden, non-empty notify cancels forbidden state
     */
    @Test
    public void testEmptyNotifyCauseForbidden() {
        RegistryDirectory registryDirectory = getRegistryDirectory();
        List invokers = null;

        List<URL> serviceUrls = new ArrayList<URL>();
        registryDirectory.notify(serviceUrls);

        RpcInvocation inv = new RpcInvocation();
        try {
            invokers = registryDirectory.list(inv);
        } catch (RpcException e) {
            Assert.assertEquals(RpcException.FORBIDDEN_EXCEPTION, e.getCode());
            Assert.assertEquals(false, registryDirectory.isAvailable());
        }

        serviceUrls.add(SERVICEURL.addParameter("methods", "getXXX1"));
        serviceUrls.add(SERVICEURL2.addParameter("methods", "getXXX1,getXXX2"));
        serviceUrls.add(SERVICEURL3.addParameter("methods", "getXXX1,getXXX2,getXXX3"));

        registryDirectory.notify(serviceUrls);
        inv.setMethodName("getXXX2");
        invokers = registryDirectory.list(inv);
        Assert.assertEquals(true, registryDirectory.isAvailable());
        Assert.assertEquals(2, invokers.size());
    }

    private static boolean isScriptUnsupported = new ScriptEngineManager().getEngineByName("javascript") == null;

    /**
     * 1. notify twice, the second time notified router rules should completely replace the former one. 2. notify with
     * no router url, do nothing to current routers 3. notify with only one router url, with router=clean, clear all
     * current routers
     */
    @Test
    public void testNotifyRouterUrls() {
        if (isScriptUnsupported) return;
        RegistryDirectory registryDirectory = getRegistryDirectory();
        URL routerurl = URL.valueOf(Constants.ROUTE_PROTOCOL + "://127.0.0.1:9096/");
        URL routerurl2 = URL.valueOf(Constants.ROUTE_PROTOCOL + "://127.0.0.1:9097/");

        List<URL> serviceUrls = new ArrayList<URL>();
        // without ROUTER_KEY, the first router should not be created.
        serviceUrls.add(routerurl.addParameter(Constants.TYPE_KEY, "javascript").addParameter(Constants.ROUTER_KEY,
                                                                                                 "notsupported").addParameter(Constants.RULE_KEY,
                                                                                                                              "function test1(){}"));
        serviceUrls.add(routerurl2.addParameter(Constants.TYPE_KEY, "javascript").addParameter(Constants.ROUTER_KEY,
                                                                                                  ScriptRouterFactory.NAME).addParameter(Constants.RULE_KEY,
                                                                                                                                         "function test1(){}"));

        registryDirectory.notify(serviceUrls);
        List<Router> routers = registryDirectory.getRouters();
        //default invocation selector
        Assert.assertEquals(1+1, routers.size());
        Assert.assertEquals(ScriptRouter.class, routers.get(0).getClass());

        registryDirectory.notify(new ArrayList<URL>());
        routers = registryDirectory.getRouters();
        Assert.assertEquals(1 + 1, routers.size());
        Assert.assertEquals(ScriptRouter.class, routers.get(0).getClass());

        serviceUrls.clear();
        serviceUrls.add(routerurl.addParameter(Constants.ROUTER_KEY, Constants.ROUTER_TYPE_CLEAR));
        registryDirectory.notify(serviceUrls);
        routers = registryDirectory.getRouters();
        Assert.assertEquals(0 + 1, routers.size());
    }
    
    /**
     * 测试override规则是否优先
     * 场景：先推送override，后推送invoker
     */
    @Test
    public void testNotifyoverrideUrls_beforeInvoker(){
        RegistryDirectory registryDirectory = getRegistryDirectory();
        List<URL> overrideUrls = new ArrayList<URL>();
        overrideUrls.add(URL.valueOf("override://0.0.0.0?timeout=1&connections=5"));
        registryDirectory.notify(overrideUrls);
        //注册中心初始只推送override，dirctory状态应该是false，因为没有invoker存在。
        Assert.assertEquals(false, registryDirectory.isAvailable());
        
        //在推送两个provider,directory状态恢复为true
        List<URL> serviceUrls = new ArrayList<URL>();
        serviceUrls.add(SERVICEURL.addParameter("timeout", "1000"));
        serviceUrls.add(SERVICEURL2.addParameter("timeout", "1000").addParameter("connections", "10"));

        registryDirectory.notify(serviceUrls);
        Assert.assertEquals(true, registryDirectory.isAvailable());
        
        //开始验证参数值

        invocation = new RpcInvocation();

        List<Invoker<?>> invokers = registryDirectory.list(invocation);
        Assert.assertEquals(2, invokers.size());
        
        Assert.assertEquals("override rute must be first priority", "1", invokers.get(0).getUrl().getParameter("timeout"));
        Assert.assertEquals("override rute must be first priority", "5", invokers.get(0).getUrl().getParameter("connections"));
    }
    
    /**
     * 测试override规则是否优先
     * 场景：先推送override，后推送invoker
     */
    @Test
    public void testNotifyoverrideUrls_afterInvoker(){
        RegistryDirectory registryDirectory = getRegistryDirectory();
        
        //在推送两个provider,directory状态恢复为true
        List<URL> serviceUrls = new ArrayList<URL>();
        serviceUrls.add(SERVICEURL.addParameter("timeout", "1000"));
        serviceUrls.add(SERVICEURL2.addParameter("timeout", "1000").addParameter("connections", "10"));

        registryDirectory.notify(serviceUrls);
        Assert.assertEquals(true, registryDirectory.isAvailable());
        
        List<URL> overrideUrls = new ArrayList<URL>();
        overrideUrls.add(URL.valueOf("override://0.0.0.0?timeout=1&connections=5"));
        registryDirectory.notify(overrideUrls);
        
        //开始验证参数值

        invocation = new RpcInvocation();

        List<Invoker<?>> invokers = registryDirectory.list(invocation);
        Assert.assertEquals(2, invokers.size());
        
        Assert.assertEquals("override rute must be first priority", "1", invokers.get(0).getUrl().getParameter("timeout"));
        Assert.assertEquals("override rute must be first priority", "5", invokers.get(0).getUrl().getParameter("connections"));
    }
    
    /**
     * 测试override规则是否优先
     * 场景：与invoker 一起推override规则
     */
    @Test
    public void testNotifyoverrideUrls_withInvoker(){
        RegistryDirectory registryDirectory = getRegistryDirectory();
        
        List<URL> durls = new ArrayList<URL>();
        durls.add(SERVICEURL.addParameter("timeout", "1000"));
        durls.add(SERVICEURL2.addParameter("timeout", "1000").addParameter("connections", "10"));
        durls.add(URL.valueOf("override://0.0.0.0?timeout=1&connections=5"));

        registryDirectory.notify(durls);
        Assert.assertEquals(true, registryDirectory.isAvailable());
        
        //开始验证参数值

        invocation = new RpcInvocation();

        List<Invoker<?>> invokers = registryDirectory.list(invocation);
        Assert.assertEquals(2, invokers.size());
        
        Assert.assertEquals("override rute must be first priority", "1", invokers.get(0).getUrl().getParameter("timeout"));
        Assert.assertEquals("override rute must be first priority", "5", invokers.get(0).getUrl().getParameter("connections"));
    }
    
    /**
     * 测试override规则是否优先
     * 场景：推送的规则与provider的参数是一样的
     * 期望：不需要重新引用
     */
    @Test
    public void testNotifyoverrideUrls_Nouse(){
        RegistryDirectory registryDirectory = getRegistryDirectory();
        invocation = new RpcInvocation();
        
        List<URL> durls = new ArrayList<URL>();
        durls.add(SERVICEURL.addParameter("timeout", "1"));//一个一样，一个不一样
        durls.add(SERVICEURL2.addParameter("timeout", "1").addParameter("connections", "5"));
        registryDirectory.notify(durls);
        List<Invoker<?>> invokers = registryDirectory.list(invocation);
        Assert.assertEquals(2, invokers.size());
        Invoker<?> a1Invoker = invokers.get(0);
        Invoker<?> b1Invoker = invokers.get(1);
        
        durls = new ArrayList<URL>();
        durls.add(URL.valueOf("override://0.0.0.0?timeout=1&connections=5"));
        registryDirectory.notify(durls);
        Assert.assertEquals(true, registryDirectory.isAvailable());
        
        invokers = registryDirectory.list(invocation);
        Assert.assertEquals(2, invokers.size());
        
        Invoker<?> a2Invoker = invokers.get(0);
        Invoker<?> b2Invoker = invokers.get(1);
        //参数不一样，必须重新引用
        Assert.assertFalse("object not same",a1Invoker == a2Invoker);
        
        //参数一样，不能重新引用
        Assert.assertTrue("object same",b1Invoker == b2Invoker);
    }
    
    /**
     * 测试针对某个provider的Override规则
     */
    @Test
    public void testNofityOverrideUrls_Provider(){
        RegistryDirectory registryDirectory = getRegistryDirectory();
        invocation = new RpcInvocation();
        
        List<URL> durls = new ArrayList<URL>();
        durls.add(SERVICEURL.setHost("10.20.30.140").addParameter("timeout", "1"));//一个一样，一个不一样
        durls.add(SERVICEURL2.setHost("10.20.30.141").addParameter("timeout", "2"));
        registryDirectory.notify(durls);
        
        durls = new ArrayList<URL>();
        durls.add(URL.valueOf("override://0.0.0.0?timeout=3"));
        durls.add(URL.valueOf("override://10.20.30.141:9092?timeout=4"));
        registryDirectory.notify(durls);
        
        List<Invoker<?>> invokers = registryDirectory.list(invocation);
        Invoker<?> aInvoker = invokers.get(0);
        Invoker<?> bInvoker = invokers.get(1);
        Assert.assertEquals("3",aInvoker.getUrl().getParameter("timeout"));
        Assert.assertEquals("4",bInvoker.getUrl().getParameter("timeout"));
    }
    
    /**
     * 测试清除override规则，同时下发清除规则和其他override规则
     * 测试是否能够恢复到推送时的providerUrl
     */
    @Test
    public void testNofityOverrideUrls_Clean1(){
        RegistryDirectory registryDirectory = getRegistryDirectory();
        invocation = new RpcInvocation();
        
        List<URL> durls = new ArrayList<URL>();
        durls.add(SERVICEURL.setHost("10.20.30.140").addParameter("timeout", "1"));
        registryDirectory.notify(durls);
        
        durls = new ArrayList<URL>();
        durls.add(URL.valueOf("override://0.0.0.0?timeout=1000"));
        registryDirectory.notify(durls);
        
        durls = new ArrayList<URL>();
        durls.add(URL.valueOf("override://0.0.0.0?timeout=3"));
        durls.add(URL.valueOf("override://0.0.0.0"));
        registryDirectory.notify(durls);
        
        List<Invoker<?>> invokers = registryDirectory.list(invocation);
        Invoker<?> aInvoker = invokers.get(0);
        //需要恢复到最初的providerUrl
        Assert.assertEquals("1",aInvoker.getUrl().getParameter("timeout"));
    }
    
    /**
     * 测试清除override规则，只下发override清除规则
     * 测试是否能够恢复到推送时的providerUrl
     */
    @Test
    public void testNofityOverrideUrls_CleanOnly(){
        RegistryDirectory registryDirectory = getRegistryDirectory();
        invocation = new RpcInvocation();
        
        List<URL> durls = new ArrayList<URL>();
        durls.add(SERVICEURL.setHost("10.20.30.140").addParameter("timeout", "1"));
        registryDirectory.notify(durls);
        Assert.assertEquals(null,registryDirectory.getUrl().getParameter("mock"));
        
        //override
        durls = new ArrayList<URL>();
        durls.add(URL.valueOf("override://0.0.0.0?timeout=1000&mock=fail"));
        registryDirectory.notify(durls);
        List<Invoker<?>> invokers = registryDirectory.list(invocation);
        Invoker<?> aInvoker = invokers.get(0);
        Assert.assertEquals("1000",aInvoker.getUrl().getParameter("timeout"));
        Assert.assertEquals("fail",registryDirectory.getUrl().getParameter("mock"));
        
        //override clean
        durls = new ArrayList<URL>();
        durls.add(URL.valueOf("override://100.16.128.100/dubbo.test.api.HelloService?anyhost=true"));
        registryDirectory.notify(durls);
        invokers = registryDirectory.list(invocation);
        aInvoker = invokers.get(0);
        //需要恢复到最初的providerUrl
        Assert.assertEquals("1",aInvoker.getUrl().getParameter("timeout"));
        
        Assert.assertEquals(null,registryDirectory.getUrl().getParameter("mock"));
    }
    
    /**
     * 测试同时推送清除override和针对某个provider的override
     * 看override是否能够生效
     */
    @Test
    public void testNofityOverrideUrls_CleanNOverride(){
        RegistryDirectory registryDirectory = getRegistryDirectory();
        invocation = new RpcInvocation();
        
        List<URL> durls = new ArrayList<URL>();
        durls.add(SERVICEURL.setHost("10.20.30.140").addParameter("timeout", "1"));
        registryDirectory.notify(durls);
        
        durls = new ArrayList<URL>();
        durls.add(URL.valueOf("override://0.0.0.0?timeout=3"));
        durls.add(URL.valueOf("override://0.0.0.0"));
        durls.add(URL.valueOf("override://10.20.30.140:9091?timeout=4"));
        registryDirectory.notify(durls);
        
        List<Invoker<?>> invokers = registryDirectory.list(invocation);
        Invoker<?> aInvoker = invokers.get(0);
        Assert.assertEquals("4",aInvoker.getUrl().getParameter("timeout"));
    }

    @Test
    public void testNotifyRouterUrls_Clean() {
        if (isScriptUnsupported) return;
        RegistryDirectory registryDirectory = getRegistryDirectory();
        URL routerurl = URL.valueOf(Constants.ROUTE_PROTOCOL + "://127.0.0.1:9096/").addParameter(Constants.ROUTER_KEY,
                                                                                                     "javascript").addParameter(Constants.RULE_KEY,
                                                                                                                                "function test1(){}").addParameter(Constants.ROUTER_KEY,
                                                                                                                                                                   "script"); // FIX
                                                                                                                                                                              // BAD

        List<URL> serviceUrls = new ArrayList<URL>();
        // without ROUTER_KEY, the first router should not be created.
        serviceUrls.add(routerurl);
        registryDirectory.notify(serviceUrls);
        List routers = registryDirectory.getRouters();
        Assert.assertEquals(1 + 1, routers.size());

        serviceUrls.clear();
        serviceUrls.add(routerurl.addParameter(Constants.ROUTER_KEY, Constants.ROUTER_TYPE_CLEAR));
        registryDirectory.notify(serviceUrls);
        routers = registryDirectory.getRouters();
        Assert.assertEquals(0 + 1, routers.size());
    }

    // mock protocol
    /**
     * 测试mock provider下发
     */
    @Test
    public void testNotify_MockProviderOnly() {
    	RegistryDirectory registryDirectory = getRegistryDirectory();
    	
    	List<URL> serviceUrls = new ArrayList<URL>();
        serviceUrls.add(SERVICEURL.addParameter("methods", "getXXX1"));
        serviceUrls.add(SERVICEURL2.addParameter("methods", "getXXX1,getXXX2"));
        serviceUrls.add(SERVICEURL.setProtocol(Constants.MOCK_PROTOCOL));

        registryDirectory.notify(serviceUrls);
        Assert.assertEquals(true, registryDirectory.isAvailable());
        invocation = new RpcInvocation();

        List invokers = registryDirectory.list(invocation);
        Assert.assertEquals(2, invokers.size());
    	
        RpcInvocation mockinvocation = new RpcInvocation();
        mockinvocation.setAttachment(Constants.INVOCATION_NEED_MOCK, "true");
        invokers = registryDirectory.list(mockinvocation);
        Assert.assertEquals(1, invokers.size());
    }
    
    private static interface DemoService {
    }

    private static class MockRegistry implements Registry {

        CountDownLatch latch;
        boolean        destroyWithError;

        public MockRegistry(CountDownLatch latch){
            this.latch = latch;
        }

        public MockRegistry(boolean destroyWithError){
            this.destroyWithError = destroyWithError;
        }

        public void register(URL url, NotifyListener listener) {

        }

        public void unregister(URL url, NotifyListener listener) {

        }

        public void subscribe(URL url, NotifyListener listener) {

        }

        public void unsubscribe(URL url, NotifyListener listener) {
            if (latch != null )latch.countDown();
        }

        public List<URL> lookup(URL url) {
            return null;
        }

        public URL getUrl() {
            return null;
        }

        public boolean isAvailable() {
            return true;
        }

        public void destroy() {
            if (destroyWithError) {
                throw new RpcException("test exception ignore.");
            }
        }
    }
}