/* * 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.kylin.rest.service; import java.io.IOException; import java.util.Collection; import java.util.Collections; import java.util.HashMap; import java.util.Map; import java.util.Set; import org.apache.curator.framework.recipes.leader.Participant; import org.apache.kylin.common.restclient.RestClient; import org.apache.kylin.common.util.Pair; import org.apache.kylin.job.impl.curator.CuratorLeaderSelector; import org.apache.kylin.job.impl.curator.CuratorScheduler; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Component; @Component("serviceDiscoveryStateService") public class ServiceDiscoveryStateService extends BasicService { private static final Logger logger = LoggerFactory.getLogger(ServiceDiscoveryStateService.class); public Set<Participant> getAllParticipants() { CuratorLeaderSelector leaderSelector = CuratorScheduler.getLeaderSelector(); if (leaderSelector != null) { return leaderSelector.getParticipants(); } else { return Collections.emptySet(); } } public boolean isActiveJobNode() { CuratorLeaderSelector leaderSelector = CuratorScheduler.getLeaderSelector(); return leaderSelector != null && leaderSelector.hasDefaultSchedulerStarted(); } public Map<String, String> getJobServerState(Collection<String> servers) throws IOException { Map<String, String> r = new HashMap<>(); for (String server : servers) { RestClient client = new RestClient(server); Pair<String, String> jobServerState = client.getJobServerWithState(); logger.info("Ask server: {} for its job server state, is active job node: {}" // , jobServerState.getFirst() // , jobServerState.getSecond());// r.put(jobServerState.getFirst(), jobServerState.getSecond()); } return r; } }