cpp/examples/high_level_writer_example.cc

/*
 * 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.
 */

#include <iostream>

#include "arrow/api.h"
#include "arrow/filesystem/api.h"

#include "./config.h"
#include "graphar/api/high_level_writer.h"
#include "graphar/writer_util.h"

void vertices_builder() {
  // construct vertices builder
  std::string vertex_meta_file =
      GetTestingResourceRoot() + "/ldbc/parquet/" + "person.vertex.yml";
  auto vertex_meta = graphar::Yaml::LoadFile(vertex_meta_file).value();
  auto vertex_info = graphar::VertexInfo::Load(vertex_meta).value();
  graphar::IdType start_index = 0;
  graphar::builder::VerticesBuilder builder(vertex_info, "/tmp/", start_index);

  graphar::WriterOptions::ParquetOptionBuilder parquetOptionBuilder;
  parquetOptionBuilder.compression(arrow::Compression::ZSTD);
  builder.SetWriterOptions(parquetOptionBuilder.build());

  // set validate level
  builder.SetValidateLevel(graphar::ValidateLevel::strong_validate);

  // prepare vertex data
  int vertex_count = 3;
  std::vector<std::string> property_names = {"id", "firstName", "lastName",
                                             "gender", "emails"};
  std::vector<int64_t> id = {0, 1, 2};
  std::vector<std::string> firstName = {"John", "Jane", "Alice"};
  std::vector<std::string> lastName = {"Smith", "Doe", "Wonderland"};
  std::vector<std::string> gender = {"male", "famale", "famale"};
  std::vector<std::vector<std::string>> emails = {
      {"john@example.com", "john.work@example.com"},
      {"jane@example.com"},
      {"alice@example.com", "alice123@example.com",
       "a.wonderland@example.com"}};

  // add vertices
  for (int i = 0; i < vertex_count; i++) {
    graphar::builder::Vertex v;
    v.AddProperty(property_names[0], id[i]);
    v.AddProperty(property_names[1], firstName[i]);
    v.AddProperty(property_names[2], lastName[i]);
    v.AddProperty(property_names[3], gender[i]);
    for (const auto& email : emails[i]) {
      v.AddProperty(graphar::Cardinality::LIST, property_names[4],
                    email);  // Multi-property
    }
    ASSERT(builder.AddVertex(v).ok());
  }

  // dump
  ASSERT(builder.GetNum() == vertex_count);
  std::cout << "vertex_count=" << builder.GetNum() << std::endl;
  ASSERT(builder.Dump().ok());
  std::cout << "dump vertices collection successfully!" << std::endl;

  // clear vertices
  builder.Clear();
  ASSERT(builder.GetNum() == 0);
}

void edges_builder() {
  // construct edges builder
  std::string edge_meta_file = GetTestingResourceRoot() +
                               "/ldbc_sample/parquet/" +
                               "person_knows_person.edge.yml";
  auto edge_meta = graphar::Yaml::LoadFile(edge_meta_file).value();
  auto edge_info = graphar::EdgeInfo::Load(edge_meta).value();
  auto vertex_count = 3;
  graphar::builder::EdgesBuilder builder(
      edge_info, "/tmp/", graphar::AdjListType::ordered_by_dest, vertex_count);

  graphar::WriterOptions::ParquetOptionBuilder parquetOptionBuilder;
  parquetOptionBuilder.compression(arrow::Compression::ZSTD);
  builder.SetWriterOptions(parquetOptionBuilder.build());

  // set validate level
  builder.SetValidateLevel(graphar::ValidateLevel::strong_validate);

  // prepare edge data
  int edge_count = 4;
  std::vector<std::string> property_names = {"creationDate"};
  std::vector<int64_t> src = {1, 0, 0, 2};
  std::vector<int64_t> dst = {0, 1, 2, 1};
  std::vector<std::string> creationDate = {"2010-01-01", "2011-01-01",
                                           "2012-01-01", "2013-01-01"};

  // add edges
  for (int i = 0; i < edge_count; i++) {
    graphar::builder::Edge e(src[i], dst[i]);
    e.AddProperty("creationDate", creationDate[i]);
    ASSERT(builder.AddEdge(e).ok());
  }

  // dump
  ASSERT(builder.GetNum() == edge_count);
  std::cout << "edge_count=" << builder.GetNum() << std::endl;
  ASSERT(builder.Dump().ok());
  std::cout << "dump edges collection successfully!" << std::endl;

  // clear edges
  builder.Clear();
  ASSERT(builder.GetNum() == 0);
}

int main(int argc, char* argv[]) {
  // vertices builder
  std::cout << "Vertices builder" << std::endl;
  std::cout << "-------------------" << std::endl;
  vertices_builder();
  std::cout << std::endl;

  // edges builder
  std::cout << "Edges builder" << std::endl;
  std::cout << "----------------" << std::endl;
  edges_builder();
}