content: /*
   * 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.ambari.server.agent.stomp;
  
  import java.util.Collection;
  import java.util.List;
  import java.util.stream.Collectors;
  
  import org.apache.ambari.server.AmbariException;
  import org.apache.ambari.server.events.AgentConfigsUpdateEvent;
  import org.apache.ambari.server.events.publishers.AmbariEventPublisher;
  import org.apache.ambari.server.security.encryption.Encryptor;
  import org.apache.ambari.server.state.Clusters;
  import org.apache.ambari.server.state.ConfigHelper;
  import org.apache.ambari.server.state.Host;
  import org.apache.ambari.server.utils.ThreadPools;
  import org.apache.commons.collections4.CollectionUtils;
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.google.inject.Inject;
  import com.google.inject.Provider;
  import com.google.inject.Singleton;
  import com.google.inject.name.Named;
  
  @Singleton
  public class AgentConfigsHolder extends AgentHostDataHolder<AgentConfigsUpdateEvent> {
    public static final Logger LOG = LoggerFactory.getLogger(AgentConfigsHolder.class);
    private final Encryptor<AgentConfigsUpdateEvent> encryptor;
  
    @Inject
    private ConfigHelper configHelper;
  
    @Inject
    private Provider<Clusters> clusters;
  
    @Inject
    private ThreadPools threadPools;
  
    @Inject
    public AgentConfigsHolder(AmbariEventPublisher ambariEventPublisher, @Named("AgentConfigEncryptor") Encryptor<AgentConfigsUpdateEvent> encryptor) {
      this.encryptor = encryptor;
      ambariEventPublisher.register(this);
    }
  
    @Override
    public AgentConfigsUpdateEvent getCurrentData(Long hostId) throws AmbariException {
      return configHelper.getHostActualConfigs(hostId);
    }
  
    public AgentConfigsUpdateEvent getCurrentDataExcludeCluster(Long hostId, Long clusterId) throws AmbariException {
      return configHelper.getHostActualConfigsExcludeCluster(hostId, clusterId);
    }
  
    @Override
    protected AgentConfigsUpdateEvent handleUpdate(AgentConfigsUpdateEvent current, AgentConfigsUpdateEvent update) {
      return update;
    }
  
    public void updateData(Long clusterId, List<Long> hostIds) throws AmbariException {
      if (CollectionUtils.isEmpty(hostIds)) {
        // TODO cluster configs will be created before hosts assigning
        Collection<Host> hosts = clusters.get().getCluster(clusterId).getHosts();
        if (CollectionUtils.isEmpty(hosts)) {
          hostIds = clusters.get().getHosts().stream().map(Host::getHostId).collect(Collectors.toList());
        } else {
          hostIds = hosts.stream().map(Host::getHostId).collect(Collectors.toList());
        }
      }
  
      for (Long hostId : hostIds) {
        AgentConfigsUpdateEvent agentConfigsUpdateEvent = configHelper.getHostActualConfigs(hostId);
        updateData(agentConfigsUpdateEvent);
      }
    }
  
    @Override
    public AgentConfigsUpdateEvent getUpdateIfChanged(String agentHash, Long hostId) throws AmbariException {
      AgentConfigsUpdateEvent update = super.getUpdateIfChanged(agentHash, hostId);
      if (update.getClustersConfigs() == null) {
        update.setTimestamp(getData(hostId).getTimestamp());
      }
      return update;
    }
  
    @Override
    protected void regenerateDataIdentifiers(AgentConfigsUpdateEvent data) {
      data.setHash(getHash(data, encryptor.getEncryptionKey()));
      encryptor.encryptSensitiveData(data);
      data.setTimestamp(System.currentTimeMillis());
    }
  
    @Override
    protected boolean isIdentifierValid(AgentConfigsUpdateEvent data) {
      return StringUtils.isNotEmpty(data.getHash()) && data.getTimestamp() != null;
    }
  
    @Override
    protected void setIdentifiersToEventUpdate(AgentConfigsUpdateEvent update, AgentConfigsUpdateEvent hostData) {
      super.setIdentifiersToEventUpdate(update, hostData);
      update.setTimestamp(hostData.getTimestamp());
    }
  
    @Override
    protected AgentConfigsUpdateEvent getEmptyData() {
      return AgentConfigsUpdateEvent.emptyUpdate();
    }
  }
  