chengyouling commented on code in PR #4564: URL: https://github.com/apache/servicecomb-java-chassis/pull/4564#discussion_r1809770556
########## service-registry/registry-etcd/src/main/java/org/apache/servicecomb/registry/etcd/EtcdDiscovery.java: ########## @@ -0,0 +1,158 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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 + * + * http://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. + */ +package org.apache.servicecomb.registry.etcd; + +import com.google.common.collect.Lists; +import io.etcd.jetcd.ByteSequence; +import io.etcd.jetcd.Client; +import io.etcd.jetcd.KeyValue; +import io.etcd.jetcd.Watch; +import io.etcd.jetcd.kv.GetResponse; +import io.etcd.jetcd.options.GetOption; +import io.etcd.jetcd.options.WatchOption; +import io.etcd.jetcd.watch.WatchEvent; +import org.apache.commons.lang3.StringUtils; +import org.apache.servicecomb.config.BootStrapProperties; +import org.apache.servicecomb.foundation.common.utils.JsonUtils; +import org.apache.servicecomb.registry.api.Discovery; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.core.env.Environment; + +import java.nio.charset.Charset; +import java.nio.charset.StandardCharsets; +import java.util.List; +import java.util.concurrent.CompletableFuture; +import java.util.stream.Collectors; + +public class EtcdDiscovery implements Discovery<EtcdDiscoveryInstance> { + + private Environment environment; + + private String basePath; + + private EtcdRegistryProperties etcdRegistryProperties; + + private Client client; + + private InstanceChangedListener<EtcdDiscoveryInstance> instanceChangedListener; + + @Autowired + @SuppressWarnings("unused") + public void setEnvironment(Environment environment) { + this.environment = environment; + } + + @Autowired + @SuppressWarnings("unused") + public void setEtcdRegistryProperties(EtcdRegistryProperties etcdRegistryProperties) { + this.etcdRegistryProperties = etcdRegistryProperties; + } + + @Override + public String name() { + return EtcdConst.ETCD_REGISTRY_NAME; + } + + @Override + public boolean enabled(String application, String serviceName) { + return environment.getProperty(String.format(EtcdConst.ETCD_DISCOVERY_ENABLED, application, serviceName), + boolean.class, true); + } + + @Override + public List<EtcdDiscoveryInstance> findServiceInstances(String application, String serviceName) { + + String prefixPath = basePath + "/" + application + "/" + serviceName; + Watch watchClient = client.getWatchClient(); + watchClient.watch(ByteSequence.from(prefixPath, Charset.defaultCharset()), + WatchOption.builder().build(), + resp -> { + List<KeyValue> keyValueList = resp.getEvents().stream().map(WatchEvent::getKeyValue).toList(); + instanceChangedListener.onInstanceChanged(name(), application, serviceName, convertServiceInstanceList(keyValueList)); + } + ); + List<KeyValue> endpointKv = getValuesByPrefix(prefixPath); + return convertServiceInstanceList(endpointKv); + } + + public List<KeyValue> getValuesByPrefix(String prefix) { + + CompletableFuture<GetResponse> getFuture = client.getKVClient().get( + ByteSequence.from(prefix, StandardCharsets.UTF_8), + GetOption.builder().withPrefix(ByteSequence.from(prefix, StandardCharsets.UTF_8)).build() + ); + GetResponse response = MuteExceptionUtil.builder().withLog("get kv by prefix error") + .executeCompletableFuture(getFuture); + return response.getKvs(); // 返回所有匹配前缀的键值对 Review Comment: comments are written in English at the top of the line here -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
