| /* |
| * 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.zookeeper; |
| |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| import java.util.stream.Collectors; |
| |
| import javax.security.auth.login.AppConfigurationEntry; |
| import javax.security.auth.login.Configuration; |
| |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.curator.framework.CuratorFramework; |
| import org.apache.curator.framework.CuratorFrameworkFactory; |
| import org.apache.curator.framework.state.ConnectionState; |
| import org.apache.curator.retry.ExponentialBackoffRetry; |
| import org.apache.curator.utils.CloseableUtils; |
| import org.apache.curator.x.discovery.ServiceCache; |
| import org.apache.curator.x.discovery.ServiceDiscovery; |
| import org.apache.curator.x.discovery.ServiceDiscoveryBuilder; |
| import org.apache.curator.x.discovery.ServiceInstance; |
| import org.apache.curator.x.discovery.details.JsonInstanceSerializer; |
| import org.apache.curator.x.discovery.details.ServiceCacheListener; |
| import org.apache.servicecomb.config.BootStrapProperties; |
| import org.apache.servicecomb.foundation.common.concurrent.ConcurrentHashMapEx; |
| import org.apache.servicecomb.registry.api.Discovery; |
| import org.apache.zookeeper.server.auth.DigestLoginModule; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.springframework.beans.factory.annotation.Autowired; |
| import org.springframework.core.env.Environment; |
| |
| public class ZookeeperDiscovery implements Discovery<ZookeeperDiscoveryInstance> { |
| static class ZookeeperSASLConfig extends Configuration { |
| AppConfigurationEntry entry; |
| |
| public ZookeeperSASLConfig(String username, |
| String password) { |
| Map<String, String> options = new HashMap<>(); |
| options.put("username", username); |
| options.put("password", password); |
| this.entry = new AppConfigurationEntry( |
| DigestLoginModule.class.getName(), |
| AppConfigurationEntry.LoginModuleControlFlag.REQUIRED, |
| options |
| ); |
| } |
| |
| @Override |
| public AppConfigurationEntry[] getAppConfigurationEntry(String name) { |
| AppConfigurationEntry[] array = new AppConfigurationEntry[1]; |
| array[0] = entry; |
| return array; |
| } |
| } |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(ZookeeperDiscovery.class); |
| |
| private final Map<String, Map<String, ServiceCache<ZookeeperInstance>>> serviceDiscoveries = |
| new ConcurrentHashMapEx<>(); |
| |
| private Environment environment; |
| |
| private ZookeeperRegistryProperties zookeeperRegistryProperties; |
| |
| private String basePath; |
| |
| private CuratorFramework client; |
| |
| private InstanceChangedListener<ZookeeperDiscoveryInstance> instanceChangedListener; |
| |
| @Autowired |
| @SuppressWarnings("unused") |
| public void setEnvironment(Environment environment) { |
| this.environment = environment; |
| } |
| |
| @Autowired |
| @SuppressWarnings("unused") |
| public void setZookeeperRegistryProperties(ZookeeperRegistryProperties zookeeperRegistryProperties) { |
| this.zookeeperRegistryProperties = zookeeperRegistryProperties; |
| } |
| |
| @Override |
| public String name() { |
| return ZookeeperConst.ZOOKEEPER_REGISTRY_NAME; |
| } |
| |
| @Override |
| public boolean enabled(String application, String serviceName) { |
| return environment.getProperty(String.format(ZookeeperConst.ZOOKEEPER_DISCOVERY_ENABLED, application, serviceName), |
| boolean.class, true); |
| } |
| |
| @Override |
| public List<ZookeeperDiscoveryInstance> findServiceInstances(String application, String serviceName) { |
| try { |
| ServiceCache<ZookeeperInstance> discovery = serviceDiscoveries.computeIfAbsent(application, app -> |
| new ConcurrentHashMapEx<>()).computeIfAbsent(serviceName, name -> { |
| JsonInstanceSerializer<ZookeeperInstance> serializer = |
| new JsonInstanceSerializer<>(ZookeeperInstance.class); |
| ServiceDiscovery<ZookeeperInstance> dis = ServiceDiscoveryBuilder.builder(ZookeeperInstance.class) |
| .client(client) |
| .basePath(basePath + "/" + application) |
| .serializer(serializer) |
| .build(); |
| ServiceCache<ZookeeperInstance> cache = |
| dis.serviceCacheBuilder().name(serviceName).build(); |
| cache.addListener(new ServiceCacheListener() { |
| @Override |
| public void stateChanged(CuratorFramework curatorFramework, ConnectionState connectionState) { |
| LOGGER.warn("zookeeper discovery state changed {}", connectionState); |
| } |
| |
| @Override |
| public void cacheChanged() { |
| instanceChangedListener.onInstanceChanged(name(), application, serviceName, |
| toDiscoveryInstances(cache.getInstances())); |
| } |
| }); |
| try { |
| CountDownLatch latch = cache.startImmediate(); |
| if (!latch.await(5000, TimeUnit.SECONDS)) { |
| throw new IllegalStateException("cache start failed."); |
| } |
| } catch (Exception e) { |
| throw new IllegalStateException(e); |
| } |
| return cache; |
| }); |
| List<ServiceInstance<ZookeeperInstance>> instances = discovery.getInstances(); |
| return toDiscoveryInstances(instances); |
| } catch (Exception e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| |
| private List<ZookeeperDiscoveryInstance> toDiscoveryInstances( |
| List<ServiceInstance<ZookeeperInstance>> instances) { |
| return instances.stream().map(instance -> |
| new ZookeeperDiscoveryInstance(instance.getPayload())).collect(Collectors.toList()); |
| } |
| |
| @Override |
| public void setInstanceChangedListener(InstanceChangedListener<ZookeeperDiscoveryInstance> instanceChangedListener) { |
| this.instanceChangedListener = instanceChangedListener; |
| } |
| |
| @Override |
| public void init() { |
| String env = BootStrapProperties.readServiceEnvironment(environment); |
| if (StringUtils.isEmpty(env)) { |
| env = ZookeeperConst.ZOOKEEPER_DEFAULT_ENVIRONMENT; |
| } |
| basePath = String.format(ZookeeperConst.ZOOKEEPER_DISCOVERY_ROOT, env); |
| } |
| |
| @Override |
| public void run() { |
| CuratorFrameworkFactory.Builder builder = CuratorFrameworkFactory.builder() |
| .connectString(zookeeperRegistryProperties.getConnectString()) |
| .sessionTimeoutMs(zookeeperRegistryProperties.getSessionTimeoutMillis()) |
| .retryPolicy(new ExponentialBackoffRetry(1000, 3)); |
| String authSchema = zookeeperRegistryProperties.getAuthenticationSchema(); |
| if (StringUtils.isNotEmpty(authSchema)) { |
| if (!"digest".equals(authSchema)) { |
| throw new IllegalStateException("Not supported schema now. " + authSchema); |
| } |
| if (zookeeperRegistryProperties.getAuthenticationInfo() == null) { |
| throw new IllegalStateException("Auth info can not be empty. "); |
| } |
| |
| String[] authInfo = zookeeperRegistryProperties.getAuthenticationInfo().split(":"); |
| Configuration.setConfiguration(new ZookeeperSASLConfig(authInfo[0], authInfo[1])); |
| } |
| client = builder.build(); |
| client.start(); |
| } |
| |
| @Override |
| public void destroy() { |
| if (client != null) { |
| CloseableUtils.closeQuietly(client); |
| } |
| } |
| |
| @Override |
| public boolean enabled() { |
| return zookeeperRegistryProperties.isEnabled(); |
| } |
| } |