开屏

• 继Dubbo Admin实现原理文章之后，我们要具体看下Dubbo Admin各类数据的实际获取的例子。包含提供者、消费、路由规则、动态配置数据、访问控制、权重调节、负载均衡等。
• 文章是基于dubbo-2.6.0的版本进行分析。
• Dubbo Admin的服务大致分为下图，基本上每类角色一个对应的服务实现。
  

• registryCache保存了zookeeper上Dubbo服务节点上的所有信息，按照
  ConcurrentMap>>的数据结构进行保存，其中category包含providers,consumers,routers,configurators。

提供者数据

public class ProviderServiceImpl extends AbstractService implements ProviderService {

    public List<Provider> findAll() {
        return SyncUtils.url2ProviderList(findAllProviderUrl());
    }

    private Map<Long, URL> findAllProviderUrl() {
        Map<String, String> filter = new HashMap<String, String>();
        filter.put(Constants.CATEGORY_KEY, Constants.PROVIDERS_CATEGORY);
        return SyncUtils.filterFromCategory(getRegistryCache(), filter);
    }
}


public class SyncUtils {

    public static Provider url2Provider(Pair<Long, URL> pair) {
        if (pair == null) {
            return null;
        }

        Long id = pair.getKey();
        URL url = pair.getValue();

        if (url == null)
            return null;

        Provider p = new Provider();
        p.setId(id);
        p.setService(url.getServiceKey());
        p.setAddress(url.getAddress());
        p.setApplication(url.getParameter(Constants.APPLICATION_KEY));
        p.setUrl(url.toIdentityString());
        p.setParameters(url.toParameterString());

        p.setDynamic(url.getParameter("dynamic", true));
        p.setEnabled(url.getParameter(Constants.ENABLED_KEY, true));
        p.setWeight(url.getParameter(Constants.WEIGHT_KEY, Constants.DEFAULT_WEIGHT));
        p.setUsername(url.getParameter("owner"));

        return p;
    }

    public static List<Provider> url2ProviderList(Map<Long, URL> ps) {
        List<Provider> ret = new ArrayList<Provider>();
        for (Map.Entry<Long, URL> entry : ps.entrySet()) {
            ret.add(url2Provider(new Pair<Long, URL>(entry.getKey(), entry.getValue())));
        }
        return ret;
    }
}

• getRegistryCache()返回的是registryCache，保存了zookeeper上Dubbo服务节点上的所有信息。
• findAllProviderUrl()根据包含category=provider的filter获取Map的返回值，其中key是Dubbo Admin的内部维护的唯一表示ID，value为对应的服务的URL对象。
• SyncUtils.url2ProviderList()方法负责将provider的URL转为provider对象。

消费者数据

public class ConsumerServiceImpl extends AbstractService implements ConsumerService {

    public List<Consumer> findAll() {
        return SyncUtils.url2ConsumerList(findAllConsumerUrl());
    }

    private Map<Long, URL> findAllConsumerUrl() {
        Map<String, String> filter = new HashMap<String, String>();
        filter.put(Constants.CATEGORY_KEY, Constants.CONSUMERS_CATEGORY);
        return SyncUtils.filterFromCategory(getRegistryCache(), filter);
    }
}


public class SyncUtils {

    public static List<Consumer> url2ConsumerList(Map<Long, URL> cs) {
        List<Consumer> list = new ArrayList<Consumer>();
        if (cs == null) return list;
        for (Map.Entry<Long, URL> entry : cs.entrySet()) {
            list.add(url2Consumer(new Pair<Long, URL>(entry.getKey(), entry.getValue())));
        }
        return list;
    }

    public static Consumer url2Consumer(Pair<Long, URL> pair) {
        if (pair == null) {
            return null;
        }

        Long id = pair.getKey();
        URL url = pair.getValue();

        if (null == url)
            return null;

        Consumer c = new Consumer();
        c.setId(id);
        c.setService(url.getServiceKey());
        c.setAddress(url.getHost());
        c.setApplication(url.getParameter(Constants.APPLICATION_KEY));
        c.setParameters(url.toParameterString());

        return c;
    }
}

• getRegistryCache()返回的是registryCache，保存了zookeeper上Dubbo服务节点上的所有信息。
• findAllConsumerUrl()根据包含category=consumer的filter获取Map的返回值，其中key是Dubbo Admin的内部维护的唯一表示ID，value为对应的服务的URL对象。
• SyncUtils.url2ProviderList()方法负责将Consumer的URL转为Consumer对象。

路由规则数据

public class RouteServiceImpl extends AbstractService implements RouteService {

    public List<Route> findAll() {
        return SyncUtils.url2RouteList(findAllUrl());
    }

    private Map<Long, URL> findAllUrl() {
        Map<String, String> filter = new HashMap<String, String>();
        filter.put(Constants.CATEGORY_KEY, Constants.ROUTERS_CATEGORY);

        return SyncUtils.filterFromCategory(getRegistryCache(), filter);
    }
}


public class SyncUtils {

    public static List<Route> url2RouteList(Map<Long, URL> cs) {
        List<Route> list = new ArrayList<Route>();
        if (cs == null) return list;
        for (Map.Entry<Long, URL> entry : cs.entrySet()) {
            list.add(url2Route(new Pair<Long, URL>(entry.getKey(), entry.getValue())));
        }
        return list;
    }

    public static Route url2Route(Pair<Long, URL> pair) {
        if (pair == null) {
            return null;
        }

        Long id = pair.getKey();
        URL url = pair.getValue();

        if (null == url)
            return null;

        Route r = new Route();
        r.setId(id);
        r.setName(url.getParameter("name"));
        r.setService(url.getServiceKey());
        r.setPriority(url.getParameter(Constants.PRIORITY_KEY, 0));
        r.setEnabled(url.getParameter(Constants.ENABLED_KEY, true));
        r.setForce(url.getParameter(Constants.FORCE_KEY, false));
        r.setRule(url.getParameterAndDecoded(Constants.RULE_KEY));
        return r;
    }
}

• getRegistryCache()返回的是registryCache，保存了zookeeper上Dubbo服务节点上的所有信息。
• findAllUrl()根据包含category=routers的filter获取Map的返回值，其中key是Dubbo Admin的内部维护的唯一表示ID，value为对应的服务的URL对象。
• SyncUtils.url2RouteList()方法负责将Router的URL转为Router对象。

动态配置数据

public class OverrideServiceImpl extends AbstractService implements OverrideService {

    public List<Override> findAll() {
        return SyncUtils.url2OverrideList(findOverrideUrl(null, null, null));
    }

    private Map<Long, URL> findOverrideUrl(String service, String address, String application) {
        Map<String, String> filter = new HashMap<String, String>();
        filter.put(Constants.CATEGORY_KEY, Constants.CONFIGURATORS_CATEGORY);
        if (service != null && service.length() > 0) {
            filter.put(SyncUtils.SERVICE_FILTER_KEY, service);
        }
        if (address != null && address.length() > 0) {
            filter.put(SyncUtils.ADDRESS_FILTER_KEY, address);
        }
        if (application != null && application.length() > 0) {
            filter.put(Constants.APPLICATION_KEY, application);
        }
        return SyncUtils.filterFromCategory(getRegistryCache(), filter);
    }
}


public class SyncUtils {

    public static List<com.alibaba.dubbo.registry.common.domain.Override> url2OverrideList(Map<Long, URL> cs) {
        List<com.alibaba.dubbo.registry.common.domain.Override> list = new ArrayList<com.alibaba.dubbo.registry.common.domain.Override>();
        if (cs == null) return list;
        for (Map.Entry<Long, URL> entry : cs.entrySet()) {
            list.add(url2Override(new Pair<Long, URL>(entry.getKey(), entry.getValue())));
        }
        return list;
    }

    public static com.alibaba.dubbo.registry.common.domain.Override url2Override(Pair<Long, URL> pair) {
        if (pair == null) {
            return null;
        }

        Long id = pair.getKey();
        URL url = pair.getValue();

        if (null == url)
            return null;

        com.alibaba.dubbo.registry.common.domain.Override o = new com.alibaba.dubbo.registry.common.domain.Override();
        o.setId(id);

        Map<String, String> parameters = new HashMap<String, String>(url.getParameters());

        o.setService(url.getServiceKey());
        parameters.remove(Constants.INTERFACE_KEY);
        parameters.remove(Constants.GROUP_KEY);
        parameters.remove(Constants.VERSION_KEY);
        parameters.remove(Constants.APPLICATION_KEY);
        parameters.remove(Constants.CATEGORY_KEY);
        parameters.remove(Constants.DYNAMIC_KEY);
        parameters.remove(Constants.ENABLED_KEY);

        o.setEnabled(url.getParameter(Constants.ENABLED_KEY, true));

        String host = url.getHost();
        boolean anyhost = url.getParameter(Constants.ANYHOST_VALUE, false);
        if (!anyhost || !"0.0.0.0".equals(host)) {
            o.setAddress(url.getAddress());
        }

        o.setApplication(url.getParameter(Constants.APPLICATION_KEY, url.getUsername()));
        parameters.remove(Constants.VERSION_KEY);

        o.setParams(StringUtils.toQueryString(parameters));

        return o;
    }
}

• getRegistryCache()返回的是registryCache，保存了zookeeper上Dubbo服务节点上的所有信息。
• findAllUrl()根据包含category=configurators的filter获取Map的返回值，其中key是Dubbo Admin的内部维护的唯一表示ID，value为对应的服务的URL对象。
• SyncUtils.url2Override()方法负责将configurators的URL转为Override对象。

访问控制数据

public class RouteServiceImpl extends AbstractService implements RouteService {

    public List<Route> findAllForceRoute() {
        return SyncUtils.url2RouteList(findRouteUrl(null, null, true));
    }

    private Map<Long, URL> findRouteUrl(String service, String address, boolean force) {
        Map<String, String> filter = new HashMap<String, String>();
        filter.put(Constants.CATEGORY_KEY, Constants.ROUTERS_CATEGORY);
        if (service != null && service.length() > 0) {
            filter.put(SyncUtils.SERVICE_FILTER_KEY, service);
        }
        if (address != null && address.length() > 0) {
            filter.put(SyncUtils.ADDRESS_FILTER_KEY, address);
        }
        if (force) {
            filter.put("force", "true");
        }
        return SyncUtils.filterFromCategory(getRegistryCache(), filter);
    }
}


public class SyncUtils {

    public static List<Route> url2RouteList(Map<Long, URL> cs) {
        List<Route> list = new ArrayList<Route>();
        if (cs == null) return list;
        for (Map.Entry<Long, URL> entry : cs.entrySet()) {
            list.add(url2Route(new Pair<Long, URL>(entry.getKey(), entry.getValue())));
        }
        return list;
    }

    public static Route url2Route(Pair<Long, URL> pair) {
        if (pair == null) {
            return null;
        }

        Long id = pair.getKey();
        URL url = pair.getValue();

        if (null == url)
            return null;

        Route r = new Route();
        r.setId(id);
        r.setName(url.getParameter("name"));
        r.setService(url.getServiceKey());
        r.setPriority(url.getParameter(Constants.PRIORITY_KEY, 0));
        r.setEnabled(url.getParameter(Constants.ENABLED_KEY, true));
        r.setForce(url.getParameter(Constants.FORCE_KEY, false));
        r.setRule(url.getParameterAndDecoded(Constants.RULE_KEY));
        return r;
    }
}

• getRegistryCache()返回的是registryCache，保存了zookeeper上Dubbo服务节点上的所有信息。
• findAllUrl()根据包含category=routers的filter获取Map的返回值，其中key是Dubbo Admin的内部维护的唯一表示ID，value为对应的服务的URL对象。
• SyncUtils.url2Override()方法负责将routers的URL转为router对象。

权重调节数据

public class OverrideServiceImpl extends AbstractService implements OverrideService {

    public List<Override> findAll() {
        return SyncUtils.url2OverrideList(findOverrideUrl(null, null, null));
    }

    private Map<Long, URL> findOverrideUrl(String service, String address, String application) {
        Map<String, String> filter = new HashMap<String, String>();
        filter.put(Constants.CATEGORY_KEY, Constants.CONFIGURATORS_CATEGORY);
        if (service != null && service.length() > 0) {
            filter.put(SyncUtils.SERVICE_FILTER_KEY, service);
        }
        if (address != null && address.length() > 0) {
            filter.put(SyncUtils.ADDRESS_FILTER_KEY, address);
        }
        if (application != null && application.length() > 0) {
            filter.put(Constants.APPLICATION_KEY, application);
        }
        return SyncUtils.filterFromCategory(getRegistryCache(), filter);
    }
}


public class SyncUtils {

    public static List<com.alibaba.dubbo.registry.common.domain.Override> url2OverrideList(Map<Long, URL> cs) {
        List<com.alibaba.dubbo.registry.common.domain.Override> list = new ArrayList<com.alibaba.dubbo.registry.common.domain.Override>();
        if (cs == null) return list;
        for (Map.Entry<Long, URL> entry : cs.entrySet()) {
            list.add(url2Override(new Pair<Long, URL>(entry.getKey(), entry.getValue())));
        }
        return list;
    }

    public static com.alibaba.dubbo.registry.common.domain.Override url2Override(Pair<Long, URL> pair) {
        if (pair == null) {
            return null;
        }

        Long id = pair.getKey();
        URL url = pair.getValue();

        if (null == url)
            return null;

        com.alibaba.dubbo.registry.common.domain.Override o = new com.alibaba.dubbo.registry.common.domain.Override();
        o.setId(id);

        Map<String, String> parameters = new HashMap<String, String>(url.getParameters());

        o.setService(url.getServiceKey());
        parameters.remove(Constants.INTERFACE_KEY);
        parameters.remove(Constants.GROUP_KEY);
        parameters.remove(Constants.VERSION_KEY);
        parameters.remove(Constants.APPLICATION_KEY);
        parameters.remove(Constants.CATEGORY_KEY);
        parameters.remove(Constants.DYNAMIC_KEY);
        parameters.remove(Constants.ENABLED_KEY);

        o.setEnabled(url.getParameter(Constants.ENABLED_KEY, true));

        String host = url.getHost();
        boolean anyhost = url.getParameter(Constants.ANYHOST_VALUE, false);
        if (!anyhost || !"0.0.0.0".equals(host)) {
            o.setAddress(url.getAddress());
        }

        o.setApplication(url.getParameter(Constants.APPLICATION_KEY, url.getUsername()));
        parameters.remove(Constants.VERSION_KEY);

        o.setParams(StringUtils.toQueryString(parameters));

        return o;
    }
}


public class OverrideUtils {

    public static List<Weight> overridesToWeights(List<Override> overrides) {
        List<Weight> weights = new ArrayList<Weight>();
        if (overrides == null) {
            return weights;
        }
        for (Override o : overrides) {
            if (StringUtils.isEmpty(o.getParams())) {
                continue;
            } else {
                Map<String, String> params = StringUtils.parseQueryString(o.getParams());
                for (Map.Entry<String, String> entry : params.entrySet()) {
                    if (entry.getKey().equals("weight")) {
                        Weight weight = new Weight();
                        weight.setAddress(o.getAddress());
                        weight.setId(o.getId());
                        weight.setService(o.getService());
                        weight.setWeight(Integer.valueOf(entry.getValue()));
                        weights.add(weight);
                    }
                }
            }
        }
        return weights;
    }
}

• getRegistryCache()返回的是registryCache，保存了zookeeper上Dubbo服务节点上的所有信息。
• findAllUrl()根据包含category=configurators的filter获取Map的返回值，其中key是Dubbo Admin的内部维护的唯一表示ID，value为对应的服务的URL对象。
• SyncUtils.url2Override()方法负责将configurators的URL转为Override对象。
• overridesToWeights负责将Override对象转为Weight对象。

负载均衡数据

public class OverrideServiceImpl extends AbstractService implements OverrideService {

    public List<Override> findAll() {
        return SyncUtils.url2OverrideList(findOverrideUrl(null, null, null));
    }

    private Map<Long, URL> findOverrideUrl(String service, String address, String application) {
        Map<String, String> filter = new HashMap<String, String>();
        filter.put(Constants.CATEGORY_KEY, Constants.CONFIGURATORS_CATEGORY);
        if (service != null && service.length() > 0) {
            filter.put(SyncUtils.SERVICE_FILTER_KEY, service);
        }
        if (address != null && address.length() > 0) {
            filter.put(SyncUtils.ADDRESS_FILTER_KEY, address);
        }
        if (application != null && application.length() > 0) {
            filter.put(Constants.APPLICATION_KEY, application);
        }
        return SyncUtils.filterFromCategory(getRegistryCache(), filter);
    }
}


public class SyncUtils {

    public static List<com.alibaba.dubbo.registry.common.domain.Override> url2OverrideList(Map<Long, URL> cs) {
        List<com.alibaba.dubbo.registry.common.domain.Override> list = new ArrayList<com.alibaba.dubbo.registry.common.domain.Override>();
        if (cs == null) return list;
        for (Map.Entry<Long, URL> entry : cs.entrySet()) {
            list.add(url2Override(new Pair<Long, URL>(entry.getKey(), entry.getValue())));
        }
        return list;
    }

    public static com.alibaba.dubbo.registry.common.domain.Override url2Override(Pair<Long, URL> pair) {
        if (pair == null) {
            return null;
        }

        Long id = pair.getKey();
        URL url = pair.getValue();

        if (null == url)
            return null;

        com.alibaba.dubbo.registry.common.domain.Override o = new com.alibaba.dubbo.registry.common.domain.Override();
        o.setId(id);

        Map<String, String> parameters = new HashMap<String, String>(url.getParameters());

        o.setService(url.getServiceKey());
        parameters.remove(Constants.INTERFACE_KEY);
        parameters.remove(Constants.GROUP_KEY);
        parameters.remove(Constants.VERSION_KEY);
        parameters.remove(Constants.APPLICATION_KEY);
        parameters.remove(Constants.CATEGORY_KEY);
        parameters.remove(Constants.DYNAMIC_KEY);
        parameters.remove(Constants.ENABLED_KEY);

        o.setEnabled(url.getParameter(Constants.ENABLED_KEY, true));

        String host = url.getHost();
        boolean anyhost = url.getParameter(Constants.ANYHOST_VALUE, false);
        if (!anyhost || !"0.0.0.0".equals(host)) {
            o.setAddress(url.getAddress());
        }

        o.setApplication(url.getParameter(Constants.APPLICATION_KEY, url.getUsername()));
        parameters.remove(Constants.VERSION_KEY);

        o.setParams(StringUtils.toQueryString(parameters));

        return o;
    }
}


public class OverrideUtils {
    public static List<LoadBalance> overridesToLoadBalances(List<Override> overrides) {
        List<LoadBalance> loadBalances = new ArrayList<LoadBalance>();
        if (overrides == null) {
            return loadBalances;
        }
        for (Override o : overrides) {
            if (StringUtils.isEmpty(o.getParams())) {
                continue;
            } else {
                Map<String, String> params = StringUtils.parseQueryString(o.getParams());
                for (Map.Entry<String, String> entry : params.entrySet()) {
                    if (entry.getKey().endsWith("loadbalance")) {
                        LoadBalance loadBalance = new LoadBalance();
                        String method = null;
                        if (entry.getKey().endsWith(".loadbalance")) {
                            method = entry.getKey().split(".loadbalance")[0];
                        } else {
                            method = "*";
                        }

                        loadBalance.setMethod(method);
                        loadBalance.setId(o.getId());
                        loadBalance.setService(o.getService());
                        loadBalance.setStrategy(entry.getValue());
                        loadBalances.add(loadBalance);

                    }
                }
            }
        }
        return loadBalances;
    }
}

• getRegistryCache()返回的是registryCache，保存了zookeeper上Dubbo服务节点上的所有信息。
• findAllUrl()根据包含category=configurators的filter获取Map的返回值，其中key是Dubbo Admin的内部维护的唯一表示ID，value为对应的服务的URL对象。
• SyncUtils.url2Override()方法负责将configurators的URL转为Override对象。
• overridesToLoadBalances负责将Override对象转为LoadBalance对象。