| /* |
| * 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.druid.curator.discovery; |
| |
| import com.google.common.base.Function; |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.Collections2; |
| import com.google.common.net.HostAndPort; |
| import org.apache.curator.x.discovery.ServiceInstance; |
| import org.apache.curator.x.discovery.ServiceProvider; |
| import org.apache.druid.client.selector.DiscoverySelector; |
| import org.apache.druid.client.selector.Server; |
| import org.apache.druid.java.util.common.lifecycle.LifecycleStart; |
| import org.apache.druid.java.util.common.lifecycle.LifecycleStop; |
| import org.apache.druid.java.util.common.logger.Logger; |
| |
| import javax.annotation.Nullable; |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.Collections; |
| |
| /** |
| * Use {@link org.apache.druid.discovery.DruidNodeDiscovery} for discovery. |
| */ |
| @Deprecated |
| public class ServerDiscoverySelector implements DiscoverySelector<Server> |
| { |
| private static final Logger log = new Logger(ServerDiscoverySelector.class); |
| |
| private final ServiceProvider serviceProvider; |
| private final String name; |
| |
| public ServerDiscoverySelector(ServiceProvider serviceProvider, String name) |
| { |
| this.serviceProvider = serviceProvider; |
| this.name = name; |
| } |
| |
| private static final Function<ServiceInstance, Server> TO_SERVER = new Function<ServiceInstance, Server>() |
| { |
| @Override |
| public Server apply(final ServiceInstance instance) |
| { |
| Preconditions.checkState( |
| instance.getPort() >= 0 || (instance.getSslPort() != null && instance.getSslPort() >= 0), |
| "Both port and sslPort not set" |
| ); |
| final int port; |
| final String scheme; |
| if (instance.getSslPort() == null) { |
| port = instance.getPort(); |
| scheme = "http"; |
| } else { |
| port = instance.getSslPort() >= 0 ? instance.getSslPort() : instance.getPort(); |
| scheme = instance.getSslPort() >= 0 ? "https" : "http"; |
| } |
| return new Server() |
| { |
| @Override |
| public String getHost() |
| { |
| return HostAndPort.fromParts(getAddress(), getPort()).toString(); |
| } |
| |
| @Override |
| public String getAddress() |
| { |
| return instance.getAddress(); |
| } |
| |
| @Override |
| public int getPort() |
| { |
| return port; |
| } |
| |
| @Override |
| public String getScheme() |
| { |
| return scheme; |
| } |
| }; |
| } |
| }; |
| |
| @Nullable |
| @Override |
| public Server pick() |
| { |
| final ServiceInstance instance; |
| try { |
| instance = serviceProvider.getInstance(); |
| } |
| catch (Exception e) { |
| log.info(e, "Exception getting instance for [%s]", name); |
| return null; |
| } |
| |
| if (instance == null) { |
| log.error("No server instance found for [%s]", name); |
| return null; |
| } |
| |
| return TO_SERVER.apply(instance); |
| } |
| |
| public Collection<Server> getAll() |
| { |
| try { |
| return Collections2.transform(serviceProvider.getAllInstances(), TO_SERVER); |
| } |
| catch (Exception e) { |
| log.info(e, "Unable to get all instances"); |
| return Collections.emptyList(); |
| } |
| } |
| |
| @LifecycleStart |
| public void start() throws Exception |
| { |
| serviceProvider.start(); |
| } |
| |
| @LifecycleStop |
| public void stop() throws IOException |
| { |
| serviceProvider.close(); |
| } |
| } |