code: /*
   * 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.skywalking.oap.server.core.storage.query;
  
  import java.io.IOException;
  import java.util.List;
  
  import org.apache.skywalking.oap.server.core.query.enumeration.ProfilingSupportStatus;
  import org.apache.skywalking.oap.server.core.query.input.Duration;
  import org.apache.skywalking.oap.server.core.query.type.Endpoint;
  import org.apache.skywalking.oap.server.core.query.type.Process;
  import org.apache.skywalking.oap.server.core.query.type.Service;
  import org.apache.skywalking.oap.server.core.query.type.ServiceInstance;
  import org.apache.skywalking.oap.server.core.storage.DAO;
  
  public interface IMetadataQueryDAO extends DAO {
  
      /**
       * List all existing services.
       */
      List<Service> listServices() throws IOException;
  
      /**
       * @param duration   The instance is required to be live in this duration.
       * @param serviceId      the owner of the instances.
       * @return list of instances matching the given conditions.
       */
      List<ServiceInstance> listInstances(final Duration duration,
                                          final String serviceId) throws IOException;
  
      ServiceInstance getInstance(final String instanceId) throws IOException;
  
      /**
       * @param instanceIds instance id list
       */
      List<ServiceInstance> getInstances(final List<String> instanceIds) throws IOException;
  
      /**
       * @param keyword   to filter the endpoints
       * @param serviceId the owner of the endpoints
       * @param limit     max match size.
       * @return list of endpoint matching the given conditions.
       */
      List<Endpoint> findEndpoint(final String keyword, final String serviceId, final int limit) throws IOException;
  
      /**
       * @param serviceId the service id of the process.
       * @param supportStatus the profiling status of the process.
       * @param lastPingStartTimeBucket the start time bucket of last ping.
       * @param lastPingEndTimeBucket the end time bucket of last ping.
       */
      List<Process> listProcesses(final String serviceId, final ProfilingSupportStatus supportStatus,
                                  final long lastPingStartTimeBucket, final long lastPingEndTimeBucket) throws IOException;
  
      /**
       * @param serviceInstanceId the instance id of the process.
       * @param duration the start and end time bucket of last ping.
       */
      List<Process> listProcesses(final String serviceInstanceId, final Duration duration, boolean includeVirtual) throws IOException;
  
      /**
       * @param agentId the agent id of the process.
       */
      List<Process> listProcesses(final String agentId) throws IOException;
  
      /**
       * @param serviceId the service id of the process
       * @param profilingSupportStatus the profiling status of the process.
       * @param lastPingStartTimeBucket the start time bucket of last ping.
       * @param lastPingEndTimeBucket the end time bucket of last ping.
       */
      long getProcessCount(final String serviceId,
                           final ProfilingSupportStatus profilingSupportStatus, final long lastPingStartTimeBucket,
                           final long lastPingEndTimeBucket) throws IOException;
  
      /**
       * @param instanceId the service instance id of the process
       */
      long getProcessCount(final String instanceId) throws IOException;
  
      /**
       * @param processId the id of the process.
       */
      Process getProcess(final String processId) throws IOException;
  }
  