/*
 * 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.util.List;
import org.apache.skywalking.oap.server.core.hierarchy.instance.InstanceHierarchyRelationTraffic;
import org.apache.skywalking.oap.server.core.hierarchy.service.ServiceHierarchyRelationTraffic;
import org.apache.skywalking.oap.server.core.storage.DAO;

public interface IHierarchyQueryDAO extends DAO {
    List<ServiceHierarchyRelationTraffic> readAllServiceHierarchyRelations() throws Exception;

    /**
     * Return the given instance's hierarchy.
     */
    List<InstanceHierarchyRelationTraffic> readInstanceHierarchyRelations(String instanceId, String layer) throws Exception;
}