| /* |
| * 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.phoenix.util; |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.sql.Connection; |
| import java.sql.PreparedStatement; |
| import java.sql.SQLException; |
| import java.util.List; |
| |
| import org.apache.phoenix.schema.types.PDataType; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.base.Function; |
| import com.google.common.collect.Lists; |
| |
| /** |
| * Executes upsert statements on a provided {@code PreparedStatement} based on incoming |
| * {@code RECORDS}. An {@link UpsertListener} is notified each time the prepared statement |
| * is executed. |
| */ |
| public abstract class UpsertExecutor<RECORD, FIELD> implements Closeable { |
| |
| /** |
| * A listener that is called for events based on incoming JSON data. |
| */ |
| public interface UpsertListener<RECORD> { |
| |
| /** |
| * Called when an upsert has been sucessfully completed. The given upsertCount is the total number of upserts |
| * completed on the caller up to this point. |
| * |
| * @param upsertCount total number of upserts that have been completed |
| */ |
| void upsertDone(long upsertCount); |
| |
| |
| /** |
| * Called when executing a prepared statement has failed on a given record. |
| * |
| * @param record the JSON record that was being upserted when the error occurred |
| */ |
| void errorOnRecord(RECORD record, Throwable throwable); |
| } |
| |
| private static final Logger LOG = LoggerFactory.getLogger(UpsertExecutor.class); |
| |
| protected final Connection conn; |
| protected final List<ColumnInfo> columnInfos; |
| protected final List<PDataType> dataTypes; |
| protected final List<Function<FIELD, Object>> conversionFunctions; |
| protected final PreparedStatement preparedStatement; |
| protected final UpsertListener<RECORD> upsertListener; |
| protected long upsertCount = 0L; |
| protected boolean initFinished = false; // allow subclasses to finish initialization |
| |
| private static PreparedStatement createStatement(Connection conn, String tableName, |
| List<ColumnInfo> columnInfoList) { |
| PreparedStatement preparedStatement; |
| try { |
| String upsertSql = QueryUtil.constructUpsertStatement(tableName, columnInfoList); |
| LOG.info("Upserting SQL data with {}", upsertSql); |
| preparedStatement = conn.prepareStatement(upsertSql); |
| } catch (SQLException e) { |
| throw new RuntimeException(e); |
| } |
| return preparedStatement; |
| } |
| |
| /** |
| * Construct with the definition of incoming columns, and the statement upon which upsert |
| * statements are to be performed. |
| */ |
| public UpsertExecutor(Connection conn, String tableName, |
| List<ColumnInfo> columnInfoList, UpsertListener<RECORD> upsertListener) { |
| this(conn, columnInfoList, createStatement(conn, tableName, columnInfoList), upsertListener); |
| } |
| |
| /** Testing constructor. Do not use in prod. */ |
| @VisibleForTesting |
| protected UpsertExecutor(Connection conn, List<ColumnInfo> columnInfoList, |
| PreparedStatement preparedStatement, UpsertListener<RECORD> upsertListener) { |
| this.conn = conn; |
| this.upsertListener = upsertListener; |
| this.columnInfos = columnInfoList; |
| this.preparedStatement = preparedStatement; |
| this.dataTypes = Lists.newArrayList(); |
| this.conversionFunctions = Lists.newArrayList(); |
| } |
| |
| /** |
| * Awkward protocol allows subclass constructors to finish initializing context before |
| * proceeding to record processing. |
| */ |
| protected void finishInit() { |
| for (ColumnInfo columnInfo : columnInfos) { |
| PDataType dataType = PDataType.fromTypeId(columnInfo.getSqlType()); |
| dataTypes.add(dataType); |
| conversionFunctions.add(createConversionFunction(dataType)); |
| } |
| this.initFinished = true; |
| } |
| |
| /** |
| * Execute upserts for each JSON record contained in the given iterable, notifying this instance's |
| * {@code UpsertListener} for each completed upsert. |
| * |
| * @param records iterable of JSON records to be upserted |
| */ |
| public void execute(Iterable<RECORD> records) { |
| if (!initFinished) { |
| finishInit(); |
| } |
| for (RECORD record : records) { |
| execute(record); |
| } |
| } |
| |
| /** |
| * Upsert a single record. |
| * |
| * @param record JSON record containing the data to be upserted |
| */ |
| protected abstract void execute(RECORD record); |
| |
| @Override |
| public void close() throws IOException { |
| try { |
| preparedStatement.close(); |
| } catch (SQLException e) { |
| // An exception while closing the prepared statement is most likely a sign of a real problem, so we don't |
| // want to hide it with closeQuietly or something similar |
| throw new RuntimeException(e); |
| } |
| } |
| |
| protected abstract Function<FIELD, Object> createConversionFunction(PDataType dataType); |
| } |