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feature 2023.x: Expand NacosLoadBalancer to conveniently support cust…
…om service list filtering and load balancing algorithms (#3794)
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48 changes: 48 additions & 0 deletions
48
...very/src/main/java/com/alibaba/cloud/nacos/loadbalancer/DefaultLoadBalancerAlgorithm.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| /* | ||
| * Copyright 2023-2024 the original author or authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
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| package com.alibaba.cloud.nacos.loadbalancer; | ||
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| import java.util.List; | ||
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| import com.alibaba.cloud.nacos.balancer.NacosBalancer; | ||
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| import org.springframework.cloud.client.ServiceInstance; | ||
| import org.springframework.cloud.client.loadbalancer.Request; | ||
| import org.springframework.core.Ordered; | ||
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| /** | ||
| * This is a default implementation of load balancing algorithm. | ||
| * use {@link com.alibaba.cloud.nacos.balancer.NacosBalancer} | ||
| * | ||
| * @author <a href="mailto:[email protected]">zhangbinhub</a> | ||
| */ | ||
| public class DefaultLoadBalancerAlgorithm implements LoadBalancerAlgorithm { | ||
| @Override | ||
| public String getServiceId() { | ||
| return LoadBalancerAlgorithm.DEFAULT_SERVICE_ID; | ||
| } | ||
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| @Override | ||
| public ServiceInstance getInstance(Request<?> request, List<ServiceInstance> serviceInstances) { | ||
| return NacosBalancer.getHostByRandomWeight3(serviceInstances); | ||
| } | ||
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| @Override | ||
| public int getOrder() { | ||
| return Ordered.LOWEST_PRECEDENCE; | ||
| } | ||
| } |
40 changes: 40 additions & 0 deletions
40
...s-discovery/src/main/java/com/alibaba/cloud/nacos/loadbalancer/LoadBalancerAlgorithm.java
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| /* | ||
| * Copyright 2023-2024 the original author or authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package com.alibaba.cloud.nacos.loadbalancer; | ||
|
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| import java.util.List; | ||
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| import org.springframework.cloud.client.ServiceInstance; | ||
| import org.springframework.cloud.client.loadbalancer.Request; | ||
| import org.springframework.core.Ordered; | ||
|
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| /** | ||
| * Load Balancer algorithm interface. | ||
| * When expanding the load balancing algorithm, implement this interface and register it as a bean. | ||
| * | ||
| * @author <a href="mailto:[email protected]">zhangbinhub</a> | ||
| */ | ||
| public interface LoadBalancerAlgorithm extends Ordered { | ||
| /** | ||
| * default service id. | ||
| */ | ||
| String DEFAULT_SERVICE_ID = "defaultServiceId"; | ||
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| String getServiceId(); | ||
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| ServiceInstance getInstance(Request<?> request, List<ServiceInstance> serviceInstances); | ||
| } |
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33 changes: 33 additions & 0 deletions
33
...s-discovery/src/main/java/com/alibaba/cloud/nacos/loadbalancer/ServiceInstanceFilter.java
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| /* | ||
| * Copyright 2023-2024 the original author or authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package com.alibaba.cloud.nacos.loadbalancer; | ||
|
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| import java.util.List; | ||
|
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| import org.springframework.cloud.client.ServiceInstance; | ||
| import org.springframework.cloud.client.loadbalancer.Request; | ||
| import org.springframework.core.Ordered; | ||
|
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| /** | ||
| * Service Instance Filter interface. | ||
| * When custom service instance list filter, implement this interface and register it as a bean. | ||
| * | ||
| * @author <a href="mailto:[email protected]">zhangbinhub</a> | ||
| */ | ||
| public interface ServiceInstanceFilter extends Ordered { | ||
| List<ServiceInstance> filterInstance(Request<?> request, List<ServiceInstance> serviceInstances); | ||
| } |
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75
...t/java/com/alibaba/cloud/nacos/discovery/NacosDiscoveryLoadBalancerConfigurationTest.java
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| /* | ||
| * Copyright 2013-2023 the original author or authors. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package com.alibaba.cloud.nacos.discovery; | ||
|
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| import com.alibaba.cloud.nacos.NacosServiceAutoConfiguration; | ||
| import com.alibaba.cloud.nacos.loadbalancer.LoadBalancerAlgorithm; | ||
| import com.alibaba.cloud.nacos.loadbalancer.LoadBalancerNacosAutoConfiguration; | ||
| import com.alibaba.cloud.nacos.loadbalancer.NacosLoadBalancerClientConfiguration; | ||
| import com.alibaba.cloud.nacos.registry.NacosServiceRegistryAutoConfiguration; | ||
| import com.alibaba.cloud.nacos.util.UtilIPv6AutoConfiguration; | ||
| import org.junit.jupiter.api.Test; | ||
|
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| import org.springframework.boot.autoconfigure.AutoConfigurations; | ||
| import org.springframework.boot.test.context.runner.ApplicationContextRunner; | ||
| import org.springframework.cloud.client.serviceregistry.AutoServiceRegistrationConfiguration; | ||
| import org.springframework.cloud.commons.util.UtilAutoConfiguration; | ||
| import org.springframework.cloud.loadbalancer.config.LoadBalancerAutoConfiguration; | ||
|
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| import static org.assertj.core.api.Assertions.assertThat; | ||
|
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| /** | ||
| * @author <a href="mailto:[email protected]">zhangbinhub</a> | ||
| **/ | ||
| public class NacosDiscoveryLoadBalancerConfigurationTest { | ||
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| private final ApplicationContextRunner contextRunner = new ApplicationContextRunner() | ||
| .withConfiguration(AutoConfigurations.of( | ||
| AutoServiceRegistrationConfiguration.class, | ||
| NacosServiceRegistryAutoConfiguration.class, | ||
| UtilAutoConfiguration.class, | ||
| UtilIPv6AutoConfiguration.class, | ||
| NacosServiceAutoConfiguration.class, | ||
| NacosDiscoveryAutoConfiguration.class, | ||
| NacosDiscoveryClientConfiguration.class, | ||
| LoadBalancerAutoConfiguration.class, this.getClass())); | ||
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| @Test | ||
| public void testNacosLoadBalancerEnabled() { | ||
| contextRunner.withPropertyValues("spring.cloud.loadbalancer.nacos.enabled=true") | ||
| .withConfiguration(AutoConfigurations.of( | ||
| LoadBalancerNacosAutoConfiguration.class, | ||
| NacosLoadBalancerClientConfiguration.class)) | ||
| .run(context -> { | ||
| assertThat(context).hasSingleBean(LoadBalancerAlgorithm.class); | ||
| assertThat(context).hasBean("nacosLoadBalancer"); | ||
| }); | ||
| } | ||
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| @Test | ||
| public void testNacosLoadBalancerDisabled() { | ||
| contextRunner.withPropertyValues("spring.cloud.loadbalancer.nacos.enabled=false") | ||
| .withConfiguration(AutoConfigurations.of( | ||
| LoadBalancerNacosAutoConfiguration.class, | ||
| NacosLoadBalancerClientConfiguration.class)) | ||
| .run(context -> { | ||
| assertThat(context).doesNotHaveBean(LoadBalancerAlgorithm.class); | ||
| assertThat(context).doesNotHaveBean("nacosLoadBalancer"); | ||
| }); | ||
| } | ||
|
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| } |