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customize getting service instance in service subscribe.

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This commit is contained in:
liuxx 2019-09-08 14:47:17 +08:00
parent aff20a84a7
commit 7dd7fa9c49
3 changed files with 39 additions and 1 deletions
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12
spring-cloud-alibaba-dubbo/src/main/java/com/alibaba/cloud/dubbo/autoconfigure/DubboMetadataAutoConfiguration.java
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@ -16,8 +16,10 @@
package com.alibaba.cloud.dubbo.autoconfigure;
import java.util.Collection;
import java.util.Optional;
import java.util.function.Supplier;
import com.alibaba.cloud.dubbo.metadata.repository.MetadataServiceInstanceSelector;
import org.apache.dubbo.config.ProtocolConfig;
import org.apache.dubbo.config.spring.ServiceBean;
import org.apache.dubbo.config.spring.context.event.ServiceBeanExportedEvent;
@ -42,6 +44,7 @@ import com.alibaba.cloud.dubbo.service.IntrospectiveDubboMetadataService;
import com.alibaba.cloud.dubbo.util.JSONUtils;
import feign.Contract;
import org.springframework.util.CollectionUtils;
/**
* Spring Boot Auto-Configuration class for Dubbo Metadata
@ -68,6 +71,15 @@ public class DubboMetadataAutoConfiguration {
return new DubboServiceBeanMetadataResolver(contract);
}
@Bean
@ConditionalOnMissingBean
public MetadataServiceInstanceSelector metadataServiceInstanceSelector() {
return serviceInstances ->
CollectionUtils.isEmpty(serviceInstances)
? Optional.empty()
: serviceInstances.stream().findAny();
}
@Bean
public Supplier<ProtocolConfig> dubboProtocolConfigSupplier(
ObjectProvider<Collection<ProtocolConfig>> protocols) {

5
spring-cloud-alibaba-dubbo/src/main/java/com/alibaba/cloud/dubbo/metadata/repository/DubboServiceMetadataRepository.java
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@ -165,6 +165,9 @@ public class DubboServiceMetadataRepository
@Autowired
private DiscoveryClient discoveryClient;
@Autowired
private MetadataServiceInstanceSelector metadataServiceInstanceSelector;
@Autowired
private JSONUtils jsonUtils;
@ -618,7 +621,7 @@ public class DubboServiceMetadataRepository
}
protected void initSubscribedDubboMetadataService(String serviceName) {
discoveryClient.getInstances(serviceName).stream().findAny()
metadataServiceInstanceSelector.choose(discoveryClient.getInstances(serviceName))
.map(this::getDubboMetadataServiceURLs)
.ifPresent(dubboMetadataServiceURLs -> {
dubboMetadataServiceURLs.forEach(dubboMetadataServiceURL -> {

23
spring-cloud-alibaba-dubbo/src/main/java/com/alibaba/cloud/dubbo/metadata/repository/MetadataServiceInstanceSelector.java Normal file
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@ -0,0 +1,23 @@
package com.alibaba.cloud.dubbo.metadata.repository;
import org.springframework.cloud.client.ServiceInstance;
import java.util.List;
import java.util.Optional;
/**
* metadata service instance selector
*
* @author liuxx
* @date 2019/9/4
*/
public interface MetadataServiceInstanceSelector {
/**
* choose a service instance to get metadata
* @param serviceInstances all service instance
* @return the service instance to get metadata
*/
Optional<ServiceInstance> choose(List<ServiceInstance> serviceInstances);
}