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LocalRegistryStore.java
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LocalRegistryStore.java
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/*
* 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.localregistry;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;
import java.util.stream.Collectors;
import org.apache.servicecomb.config.YAMLUtil;
import org.apache.servicecomb.foundation.common.utils.BeanUtils;
import org.apache.servicecomb.foundation.common.utils.JvmUtils;
import org.apache.servicecomb.localregistry.RegistryBean.Instance;
import org.apache.servicecomb.registry.api.registry.FindInstancesResponse;
import org.apache.servicecomb.registry.api.registry.Microservice;
import org.apache.servicecomb.registry.api.registry.MicroserviceFactory;
import org.apache.servicecomb.registry.api.registry.MicroserviceInstance;
import org.apache.servicecomb.registry.api.registry.MicroserviceInstances;
import org.apache.servicecomb.swagger.SwaggerUtils;
import org.apache.servicecomb.swagger.generator.SwaggerGenerator;
import com.google.common.annotations.VisibleForTesting;
public class LocalRegistryStore {
private static final String REGISTRY_FILE_NAME = "registry.yaml";
public static final LocalRegistryStore INSTANCE = new LocalRegistryStore();
private Microservice selfMicroservice;
private MicroserviceInstance selfMicroserviceInstance;
// key is microservice id
private Map<String, Microservice> microserviceMap = new ConcurrentHashMap<>();
// first key is microservice id
// second key is instance id
private Map<String, Map<String, MicroserviceInstance>> microserviceInstanceMap = new ConcurrentHashMap<>();
public LocalRegistryStore() {
}
@VisibleForTesting
public void initSelfWithMocked(Microservice microservice, MicroserviceInstance microserviceInstance) {
this.selfMicroservice = microservice;
this.selfMicroserviceInstance = microserviceInstance;
}
public void init() {
MicroserviceFactory microserviceFactory = new MicroserviceFactory();
selfMicroservice = microserviceFactory.create();
selfMicroserviceInstance = selfMicroservice.getInstance();
microserviceMap.clear();
microserviceInstanceMap.clear();
}
public void run() {
selfMicroservice.setServiceId("[local]-[" + selfMicroservice.getAppId()
+ "]-[" + selfMicroservice.getServiceName() + "]");
selfMicroserviceInstance.setInstanceId(selfMicroservice.getServiceId());
selfMicroserviceInstance.setServiceId(selfMicroservice.getServiceId());
List<RegistryBean> beans = loadYamlBeans();
BeanUtils.getBeansOfType(RegistryBean.class).entrySet()
.forEach(entry -> beans.add(entry.getValue()));
initRegistryFromBeans(beans);
addSelf();
}
private void addSelf() {
microserviceMap.put(selfMicroservice.getServiceId(), selfMicroservice);
Map<String, MicroserviceInstance> selfInstanceMap = new HashMap<>(1);
selfInstanceMap.put(selfMicroserviceInstance.getInstanceId(), selfMicroserviceInstance);
microserviceInstanceMap.put(selfMicroservice.getServiceId(), selfInstanceMap);
}
public Microservice getSelfMicroservice() {
return selfMicroservice;
}
public MicroserviceInstance getSelfMicroserviceInstance() {
return selfMicroserviceInstance;
}
private List<RegistryBean> loadYamlBeans() {
List<RegistryBean> beans = new ArrayList<>();
try {
ClassLoader loader = JvmUtils.findClassLoader();
Enumeration<URL> urls = loader.getResources(REGISTRY_FILE_NAME);
while (urls.hasMoreElements()) {
URL url = urls.nextElement();
try (InputStream is = url.openStream()) {
if (is != null) {
beans.addAll(initFromData(is));
}
}
}
} catch (IOException e) {
throw new IllegalStateException(e);
}
return beans;
}
private List<RegistryBean> initFromData(InputStream is) {
Map<String, Object> data = YAMLUtil.yaml2Properties(is);
return initFromData(data);
}
@SuppressWarnings("unchecked")
private List<RegistryBean> initFromData(Map<String, Object> data) {
List<RegistryBean> beans = new ArrayList<>();
for (Entry<String, Object> entry : data.entrySet()) {
String name = entry.getKey();
List<Map<String, Object>> serviceConfigs = (List<Map<String, Object>>) entry.getValue();
for (Map<String, Object> serviceConfig : serviceConfigs) {
beans.add(RegistryBean.buildFromYamlModel(name, serviceConfig));
}
}
return beans;
}
private void initRegistryFromBeans(List<RegistryBean> beans) {
beans.forEach((bean -> {
Microservice microservice = new Microservice();
microservice.setAppId(bean.getAppId());
microservice.setServiceName(bean.getServiceName());
microservice.setVersion(bean.getVersion());
microservice.setServiceId(bean.getId());
microservice.setSchemas(bean.getSchemaIds());
addSchemaInterface(bean, microservice);
microserviceMap.put(microservice.getServiceId(), microservice);
addInstances(bean, microservice);
}));
}
private void addSchemaInterface(RegistryBean bean, Microservice microservice) {
bean.getSchemaInterfaces().forEach((k, v) -> {
SwaggerGenerator generator = SwaggerGenerator.create(v);
microservice.getSchemaMap().put(k, SwaggerUtils.swaggerToString(generator.generate()));
});
}
private void addInstances(RegistryBean bean, Microservice microservice) {
Map<String, MicroserviceInstance> instanceMap = new ConcurrentHashMap<>();
microserviceInstanceMap.put(microservice.getServiceId(), instanceMap);
for (Instance item : bean.getInstances().getInstances()) {
MicroserviceInstance instance = new MicroserviceInstance();
instance.setInstanceId(UUID.randomUUID().toString());
instance.setEndpoints(item.getEndpoints());
instance.setServiceId(microservice.getServiceId());
instanceMap.put(instance.getInstanceId(), instance);
}
}
public Microservice getMicroservice(String microserviceId) {
return microserviceMap.get(microserviceId);
}
public List<Microservice> getAllMicroservices() {
return microserviceMap.values().stream().collect(Collectors.toList());
}
public String getSchema(String microserviceId, String schemaId) {
Microservice microservice = microserviceMap.get(microserviceId);
if (microservice == null) {
return null;
}
return microserviceMap.get(microserviceId).getSchemaMap().get(schemaId);
}
public MicroserviceInstance findMicroserviceInstance(String serviceId, String instanceId) {
Map<String, MicroserviceInstance> microserviceInstance = microserviceInstanceMap.get(serviceId);
if (microserviceInstance == null) {
return null;
}
return microserviceInstanceMap.get(serviceId).get(instanceId);
}
// local registry do not care about version and revision
public MicroserviceInstances findServiceInstances(String appId, String serviceName, String versionRule) {
MicroserviceInstances microserviceInstances = new MicroserviceInstances();
FindInstancesResponse findInstancesResponse = new FindInstancesResponse();
List<MicroserviceInstance> instances = new ArrayList<>();
Collectors.toList();
microserviceInstanceMap.values().forEach(
allInstances -> allInstances.values().stream().filter(
aInstance -> {
Microservice service = microserviceMap.get(aInstance.getServiceId());
return service.getAppId().equals(appId) && service.getServiceName().equals(serviceName);
}
).forEach(item -> instances.add(item)));
if (instances.isEmpty()) {
microserviceInstances.setMicroserviceNotExist(true);
} else {
findInstancesResponse.setInstances(instances);
microserviceInstances.setMicroserviceNotExist(false);
microserviceInstances.setInstancesResponse(findInstancesResponse);
}
return microserviceInstances;
}
}