s2core/src/main/scala/org/apache/s2graph/core/EdgeFetcher.scala

/*
 * 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
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package org.apache.s2graph.core

import com.typesafe.config.Config
import org.apache.s2graph.core.types.VertexId

import scala.concurrent.{ExecutionContext, Future}

trait EdgeFetcher extends AutoCloseable {

  def init(config: Config)(implicit ec: ExecutionContext): Unit = {}

  def fetches(queryRequests: Seq[QueryRequest],
              prevStepEdges: Map[VertexId, Seq[EdgeWithScore]])(implicit ec: ExecutionContext): Future[Seq[StepResult]]

  def fetchEdgesAll()(implicit ec: ExecutionContext): Future[Seq[S2EdgeLike]]

  def close(): Unit = {}

}