gerrit-server/src/main/java/com/google/gerrit/server/schema/Schema_127.java

// Copyright (C) 2016 The Android Open Source Project
//
// Licensed 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 com.google.gerrit.server.schema;

import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.config.SitePaths;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class Schema_127 extends SchemaVersion {
  private static final int MAX_BATCH_SIZE = 1000;

  private final SitePaths sitePaths;

  @Inject
  Schema_127(Provider<Schema_126> prior, SitePaths sitePaths) {
    super(prior);
    this.sitePaths = sitePaths;
  }

  @Override
  protected void migrateData(ReviewDb db, UpdateUI ui) throws OrmException {
    String url = H2AccountPatchReviewStore.getUrl(sitePaths);
    H2AccountPatchReviewStore.dropTableIfExists(url);
    H2AccountPatchReviewStore.createTableIfNotExists(url);
    try (Connection con = DriverManager.getConnection(url);
        PreparedStatement stmt =
            con.prepareStatement("INSERT INTO ACCOUNT_PATCH_REVIEWS "
                + "(ACCOUNT_ID, CHANGE_ID, PATCH_SET_ID, FILE_NAME) VALUES "
                + "(?, ?, ?, ?)")) {
      int batchCount = 0;

      try (Statement s = newStatement(db);
        ResultSet rs = s.executeQuery("SELECT * from ACCOUNT_PATCH_REVIEWS")) {
        while (rs.next()) {
          stmt.setInt(1, rs.getInt("ACCOUNT_ID"));
          stmt.setInt(2, rs.getInt("CHANGE_ID"));
          stmt.setInt(3, rs.getInt("PATCH_SET_ID"));
          stmt.setString(4, rs.getString("FILE_NAME"));
          stmt.addBatch();
          batchCount++;
          if (batchCount >= MAX_BATCH_SIZE) {
            stmt.executeBatch();
            batchCount = 0;
          }
        }
      }
      if (batchCount > 0) {
        stmt.executeBatch();
      }
    } catch (SQLException e) {
      throw H2AccountPatchReviewStore.convertError("insert", e);
    }
  }
}