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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。
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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。
Dubbo Admin服务类图 registryCache保存了zookeeper上Dubbo服务节点上的所有信息，按照
ConcurrentMap<category, ConcurrentMap<servicename, Map<Long, URL>>>的数据结构进行保存，其中category包含providers,consumers,routers,configurators。
提供者数据
提供者
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<Long, URL>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
消费者
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<Long, URL>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
路由规则
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<Long, URL>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
动态配置
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<Long, URL>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
访问控制
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<Long, URL>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
权重调节
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<Long, URL>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
负载均衡
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<Long, URL>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。
