Dubbo之服务禁用启用逻辑

一、简介

本文主要介绍dubbo 里面和服务disable相关的源码流程，方便以后出问题快速定位原因；
之前是一套注册中心zk集群，dubbo版本2.7.3，dubbo-admin启用禁用没有问题，现在升级dubbo版本为2.7.22，zk集群搞了2套，发现disable和enable没用了，禁用了依然可以调用，遂研究了下关于disable的相关源码，记录一下，方便后续问题排查。
图片看不清楚的滚轮放大把，博客园这块支持的，我吐槽6点......

二、核心流程

2.1 核心流程图

三、服务启动初始化暴露

3.1 DubboBootstrap初始化流程

3.2 DubboBootstrap暴露服务过程

点击查看代码

private void doExportUrlsFor1Protocol(ProtocolConfig protocolConfig, List<URL> registryURLs, int protocolConfigNum) {
        String name = protocolConfig.getName();
        if (StringUtils.isEmpty(name)) {
            name = DUBBO;
        }
 
        Map<String, String> map = new HashMap<String, String>();
        map.put(SIDE_KEY, PROVIDER_SIDE);
 
        ServiceConfig.appendRuntimeParameters(map);
        AbstractConfig.appendParameters(map, getMetrics());
        AbstractConfig.appendParameters(map, getApplication());
        AbstractConfig.appendParameters(map, getModule());
        // remove 'default.' prefix for configs from ProviderConfig
        // appendParameters(map, provider, Constants.DEFAULT_KEY);
        AbstractConfig.appendParameters(map, provider);
        AbstractConfig.appendParameters(map, protocolConfig);
        AbstractConfig.appendParameters(map, this);
        MetadataReportConfig metadataReportConfig = getMetadataReportConfig();
        if (metadataReportConfig != null && metadataReportConfig.isValid()) {
            map.putIfAbsent(METADATA_KEY, REMOTE_METADATA_STORAGE_TYPE);
        }
        if (CollectionUtils.isNotEmpty(getMethods())) {
            for (MethodConfig method : getMethods()) {
                AbstractConfig.appendParameters(map, method, method.getName());
                String retryKey = method.getName() + RETRY_SUFFIX;
                if (map.containsKey(retryKey)) {
                    String retryValue = map.remove(retryKey);
                    if (FALSE_VALUE.equals(retryValue)) {
                        map.put(method.getName() + RETRIES_SUFFIX, ZERO_VALUE);
                    }
                }
                List<ArgumentConfig> arguments = method.getArguments();
                if (CollectionUtils.isNotEmpty(arguments)) {
                    for (ArgumentConfig argument : arguments) {
                        // convert argument type
                        if (argument.getType() != null && argument.getType().length() > 0) {
                            Method[] methods = interfaceClass.getMethods();
                            // visit all methods
                            if (methods.length > 0) {
                                for (int i = 0; i < methods.length; i++) {
                                    String methodName = methods[i].getName();
                                    // target the method, and get its signature
                                    if (methodName.equals(method.getName())) {
                                        Class<?>[] argtypes = methods[i].getParameterTypes();
                                        // one callback in the method
                                        if (argument.getIndex() != -1) {
                                            if (argtypes[argument.getIndex()].getName().equals(argument.getType())) {
                                                AbstractConfig
                                                        .appendParameters(map, argument, method.getName() + "." + argument.getIndex());
                                            } else {
                                                throw new IllegalArgumentException(
                                                        "Argument config error : the index attribute and type attribute not match :index :" +
                                                                argument.getIndex() + ", type:" + argument.getType());
                                            }
                                        } else {
                                            // multiple callbacks in the method
                                            for (int j = 0; j < argtypes.length; j++) {
                                                Class<?> argclazz = argtypes[j];
                                                if (argclazz.getName().equals(argument.getType())) {
                                                    AbstractConfig.appendParameters(map, argument, method.getName() + "." + j);
                                                    if (argument.getIndex() != -1 && argument.getIndex() != j) {
                                                        throw new IllegalArgumentException(
                                                                "Argument config error : the index attribute and type attribute not match :index :" +
                                                                        argument.getIndex() + ", type:" + argument.getType());
                                                    }
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        } else if (argument.getIndex() != -1) {
                            AbstractConfig.appendParameters(map, argument, method.getName() + "." + argument.getIndex());
                        } else {
                            throw new IllegalArgumentException(
                                    "Argument config must set index or type attribute.eg: <dubbo:argument index='0' .../> or <dubbo:argument type=xxx .../>");
                        }
 
                    }
                }
            } // end of methods for
        }
 
        if (ProtocolUtils.isGeneric(generic)) {
            map.put(GENERIC_KEY, generic);
            map.put(METHODS_KEY, ANY_VALUE);
        } else {
            String revision = Version.getVersion(interfaceClass, version);
            if (revision != null && revision.length() > 0) {
                map.put(REVISION_KEY, revision);
            }
 
            String[] methods = Wrapper.getWrapper(interfaceClass).getMethodNames();
            if (methods.length == 0) {
                logger.warn("No method found in service interface " + interfaceClass.getName());
                map.put(METHODS_KEY, ANY_VALUE);
            } else {
                map.put(METHODS_KEY, StringUtils.join(new HashSet<String>(Arrays.asList(methods)), ","));
            }
        }
 
        /**
         * Here the token value configured by the provider is used to assign the value to ServiceConfig#token
         */
        if (ConfigUtils.isEmpty(token) && provider != null) {
            token = provider.getToken();
        }
 
        if (!ConfigUtils.isEmpty(token)) {
            if (ConfigUtils.isDefault(token)) {
                map.put(TOKEN_KEY, UUID.randomUUID().toString());
            } else {
                map.put(TOKEN_KEY, token);
            }
        }
        //init serviceMetadata attachments
        serviceMetadata.getAttachments().putAll(map);
 
        // export service
        String host = findConfigedHosts(protocolConfig, registryURLs, map);
        Integer port = findConfigedPorts(protocolConfig, name, map, protocolConfigNum);
        URL url = new URL(name, host, port, getContextPath(protocolConfig).map(p -> p + "/" + path).orElse(path), map);
 
        // You can customize Configurator to append extra parameters
        if (ExtensionLoader.getExtensionLoader(ConfiguratorFactory.class)
                .hasExtension(url.getProtocol())) {
            url = ExtensionLoader.getExtensionLoader(ConfiguratorFactory.class)
                    .getExtension(url.getProtocol()).getConfigurator(url).configure(url);
        }
 
        String scope = url.getParameter(SCOPE_KEY);
        // don't export when none is configured
        if (!SCOPE_NONE.equalsIgnoreCase(scope)) {
 
            // export to local if the config is not remote (export to remote only when config is remote)
            if (!SCOPE_REMOTE.equalsIgnoreCase(scope)) {
                exportLocal(url);
            }
            // export to remote if the config is not local (export to local only when config is local)
            if (!SCOPE_LOCAL.equalsIgnoreCase(scope)) {
                if (CollectionUtils.isNotEmpty(registryURLs)) {
                    for (URL registryURL : registryURLs) {
                        if (SERVICE_REGISTRY_PROTOCOL.equals(registryURL.getProtocol())) {
                            url = url.addParameterIfAbsent(SERVICE_NAME_MAPPING_KEY, "true");
                        }
 
                        //if protocol is only injvm ,not register
                        if (LOCAL_PROTOCOL.equalsIgnoreCase(url.getProtocol())) {
                            continue;
                        }
                        url = url.addParameterIfAbsent(DYNAMIC_KEY, registryURL.getParameter(DYNAMIC_KEY));
                        URL monitorUrl = ConfigValidationUtils.loadMonitor(this, registryURL);
                        if (monitorUrl != null) {
                            url = url.addParameterAndEncoded(MONITOR_KEY, monitorUrl.toFullString());
                        }
                        if (logger.isInfoEnabled()) {
                            if (url.getParameter(REGISTER_KEY, true)) {
                                logger.info("Register dubbo service " + interfaceClass.getName() + " url " + url + " to registry " +
                                        registryURL);
                            } else {
                                logger.info("Export dubbo service " + interfaceClass.getName() + " to url " + url);
                            }
                        }
 
                        // For providers, this is used to enable custom proxy to generate invoker
                        String proxy = url.getParameter(PROXY_KEY);
                        if (StringUtils.isNotEmpty(proxy)) {
                            registryURL = registryURL.addParameter(PROXY_KEY, proxy);
                        }
 
                        Invoker<?> invoker = PROXY_FACTORY.getInvoker(ref, (Class) interfaceClass,
                                registryURL.addParameterAndEncoded(EXPORT_KEY, url.toFullString()));
                        DelegateProviderMetaDataInvoker wrapperInvoker = new DelegateProviderMetaDataInvoker(invoker, this);
 
                        Exporter<?> exporter = PROTOCOL.export(wrapperInvoker);
                        exporters.add(exporter);
                    }
                } else {
                    if (logger.isInfoEnabled()) {
                        logger.info("Export dubbo service " + interfaceClass.getName() + " to url " + url);
                    }
                    Invoker<?> invoker = PROXY_FACTORY.getInvoker(ref, (Class) interfaceClass, url);
                    DelegateProviderMetaDataInvoker wrapperInvoker = new DelegateProviderMetaDataInvoker(invoker, this);
 
                    Exporter<?> exporter = PROTOCOL.export(wrapperInvoker);
                    exporters.add(exporter);
                }
 
                MetadataUtils.publishServiceDefinition(url);
            }
        }
        this.urls.add(url);
    }