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Polish spring-cloud-incubator/spring-cloud-alibaba#623 : Bugfix for the missing Event handling

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This commit is contained in:
mercyblitz 2019-08-01 11:15:28 +08:00
parent a666ddc8cb
commit a8b274e61b
2 changed files with 27 additions and 19 deletions
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5
spring-cloud-alibaba-dubbo/src/main/java/com/alibaba/cloud/dubbo/autoconfigure/DubboServiceDiscoveryAutoConfiguration.java
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@ -21,6 +21,7 @@ import org.apache.dubbo.registry.NotifyListener;
import com.alibaba.cloud.dubbo.env.DubboCloudProperties; import com.alibaba.cloud.dubbo.env.DubboCloudProperties;
import com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository; import com.alibaba.cloud.dubbo.metadata.repository.DubboServiceMetadataRepository;
import com.alibaba.cloud.dubbo.registry.AbstractSpringCloudRegistry;
import com.alibaba.cloud.dubbo.registry.event.ServiceInstancesChangedEvent; import com.alibaba.cloud.dubbo.registry.event.ServiceInstancesChangedEvent;
import com.alibaba.cloud.nacos.NacosDiscoveryProperties; import com.alibaba.cloud.nacos.NacosDiscoveryProperties;
import com.alibaba.cloud.nacos.discovery.NacosWatch; import com.alibaba.cloud.nacos.discovery.NacosWatch;
@ -142,6 +143,10 @@ public class DubboServiceDiscoveryAutoConfiguration {
return; return;
} }
ServiceInstancesChangedEvent event = new ServiceInstancesChangedEvent(serviceName, serviceInstances); ServiceInstancesChangedEvent event = new ServiceInstancesChangedEvent(serviceName, serviceInstances);
if (logger.isInfoEnabled()) {
logger.info("The event of the service instances[name : {} , size : {}] change is about to be dispatched",
serviceName, serviceInstances.size());
}
applicationEventPublisher.publishEvent(event); applicationEventPublisher.publishEvent(event);
} }

39
spring-cloud-alibaba-dubbo/src/main/java/com/alibaba/cloud/dubbo/registry/AbstractSpringCloudRegistry.java
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@ -174,24 +174,14 @@ public abstract class AbstractSpringCloudRegistry extends FailbackRegistry {
* @param listener {@link NotifyListener} * @param listener {@link NotifyListener}
*/ */
private void registerServiceInstancesChangedEventListener(URL url, NotifyListener listener) { private void registerServiceInstancesChangedEventListener(URL url, NotifyListener listener) {
String listenerId = url.toIdentityString(); String listenerId = generateId(url);
if (registerListeners.add(listenerId)) { if (registerListeners.add(listenerId)) {
applicationContext.addApplicationListener(new ApplicationListener<ServiceInstancesChangedEvent>() { applicationContext.addApplicationListener(new ApplicationListener<ServiceInstancesChangedEvent>() {
@Override @Override
public void onApplicationEvent(ServiceInstancesChangedEvent event) { public void onApplicationEvent(ServiceInstancesChangedEvent event) {
if (event.isProcessed()) { // If processed, return immediately
return;
}
String serviceName = event.getServiceName(); String serviceName = event.getServiceName();
Collection<ServiceInstance> serviceInstances = event.getServiceInstances(); Collection<ServiceInstance> serviceInstances = event.getServiceInstances();
if (logger.isInfoEnabled()) { subscribeDubboServiceURL(url, listener, serviceName, s -> serviceInstances);
logger.info("The event of the service instances[name : {} , size: {}] change has been arrived",
serviceName, serviceInstances.size());
}
subscribeDubboServiceURLs(url, listener, serviceName, s -> serviceInstances);
// Mark event to be processed
event.processed();
} }
}); });
} }
@ -201,12 +191,17 @@ public abstract class AbstractSpringCloudRegistry extends FailbackRegistry {
Set<String> subscribedServices = repository.getSubscribedServices(); Set<String> subscribedServices = repository.getSubscribedServices();
// Sync // Sync
subscribedServices.forEach(service -> subscribeDubboServiceURLs(url, listener, service, this::getServiceInstances)); subscribedServices.forEach(service -> subscribeDubboServiceURL(url, listener, service, this::getServiceInstances));
} }
protected void subscribeDubboServiceURLs(URL url, NotifyListener listener, String serviceName, protected void subscribeDubboServiceURL(URL url, NotifyListener listener, String serviceName,
Function<String, Collection<ServiceInstance>> serviceInstancesFunction) { Function<String, Collection<ServiceInstance>> serviceInstancesFunction) {
if (logger.isInfoEnabled()) {
logger.info("The Dubbo Service URL[ID : {}] is being subscribed for service[name : {}]",
generateId(url), serviceName);
}
DubboMetadataService dubboMetadataService = dubboMetadataConfigServiceProxy.getProxy(serviceName); DubboMetadataService dubboMetadataService = dubboMetadataConfigServiceProxy.getProxy(serviceName);
if (dubboMetadataService == null) { // If not found, try to initialize if (dubboMetadataService == null) { // If not found, try to initialize
@ -231,6 +226,10 @@ public abstract class AbstractSpringCloudRegistry extends FailbackRegistry {
List<URL> allSubscribedURLs = new LinkedList<>(); List<URL> allSubscribedURLs = new LinkedList<>();
if (CollectionUtils.isEmpty(serviceInstances)) { if (CollectionUtils.isEmpty(serviceInstances)) {
if (logger.isWarnEnabled()) {
logger.warn("There is no instance from service[name : {}], and then Dubbo Service[key : {}] will not be " +
"available , please make sure the further impact", serviceName, url.getServiceKey());
}
/** /**
* URLs with {@link RegistryConstants#EMPTY_PROTOCOL} * URLs with {@link RegistryConstants#EMPTY_PROTOCOL}
*/ */
@ -255,17 +254,21 @@ public abstract class AbstractSpringCloudRegistry extends FailbackRegistry {
} }
}); });
if (logger.isDebugEnabled()) {
logger.debug("The subscribed URL[{}] will notify all URLs : {}", url, subscribedURLs);
}
allSubscribedURLs.addAll(subscribedURLs); allSubscribedURLs.addAll(subscribedURLs);
} }
} }
if (logger.isDebugEnabled()) {
logger.debug("The subscribed URL[{}] will notify all URLs : {}", url, allSubscribedURLs);
}
listener.notify(allSubscribedURLs); listener.notify(allSubscribedURLs);
} }
private String generateId(URL url) {
return url.toString(VERSION_KEY, GROUP_KEY, PROTOCOL_KEY);
}
private List<URL> emptyURLs(URL url) { private List<URL> emptyURLs(URL url) {
return asList(from(url).setProtocol(EMPTY_PROTOCOL).build()); return asList(from(url).setProtocol(EMPTY_PROTOCOL).build());
} }