timoninmaxim commented on code in PR #311: URL: https://github.com/apache/ignite-extensions/pull/311#discussion_r2247181015
########## modules/cdc-ext/src/main/java/org/apache/ignite/cdc/postgresql/IgniteToPostgreSqlCdcApplier.java: ########## @@ -0,0 +1,688 @@ +/* + * 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.ignite.cdc.postgresql; + +import java.math.BigDecimal; +import java.nio.ByteBuffer; +import java.nio.ByteOrder; +import java.sql.Connection; +import java.sql.PreparedStatement; +import java.sql.SQLException; +import java.sql.Statement; +import java.sql.Types; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Iterator; +import java.util.Map; +import java.util.Set; +import java.util.UUID; +import javax.sql.DataSource; +import org.apache.ignite.IgniteException; +import org.apache.ignite.IgniteLogger; +import org.apache.ignite.binary.BinaryObject; +import org.apache.ignite.cache.CacheEntryVersion; +import org.apache.ignite.cache.QueryEntity; +import org.apache.ignite.cdc.CdcCacheEvent; +import org.apache.ignite.cdc.CdcEvent; +import org.apache.ignite.internal.util.typedef.F; + +import static org.apache.ignite.internal.processors.cache.GridCacheUtils.UNDEFINED_CACHE_ID; + +/** */ +public class IgniteToPostgreSqlCdcApplier { + /** */ + public static final String DFLT_SQL_TYPE = "OTHER"; + + /** */ + public static final Map<String, String> JAVA_TO_SQL_TYPES; + + /** */ + public static final Set<String> SQL_TYPES_WITH_PRECISION_ONLY; + + /** */ + public static final Set<String> SQL_TYPES_WITH_PRECISION_AND_SCALE; + + static { + Map<String, String> javaToSqlTypes = new HashMap<>(); + + javaToSqlTypes.put("java.lang.String", "VARCHAR"); + javaToSqlTypes.put("java.lang.Integer", "INT"); + javaToSqlTypes.put("int", "INT"); + javaToSqlTypes.put("java.lang.Long", "BIGINT"); + javaToSqlTypes.put("long", "BIGINT"); + javaToSqlTypes.put("java.lang.Boolean", "BOOLEAN"); + javaToSqlTypes.put("boolean", "BOOLEAN"); + javaToSqlTypes.put("java.lang.Double", "DOUBLE PRECISION"); + javaToSqlTypes.put("double", "DOUBLE PRECISION"); + javaToSqlTypes.put("java.lang.Float", "REAL"); + javaToSqlTypes.put("float", "REAL"); + javaToSqlTypes.put("java.math.BigDecimal", "DECIMAL"); + javaToSqlTypes.put("java.lang.Short", "SMALLINT"); + javaToSqlTypes.put("short", "SMALLINT"); + javaToSqlTypes.put("java.lang.Byte", "SMALLINT"); + javaToSqlTypes.put("byte", "SMALLINT"); + javaToSqlTypes.put("java.util.UUID", "UUID"); + javaToSqlTypes.put("[B", "BYTEA"); + javaToSqlTypes.put("java.lang.Object", "OTHER"); + + JAVA_TO_SQL_TYPES = Collections.unmodifiableMap(javaToSqlTypes); + + Set<String> sqlTypesWithPrecisionOnly = new HashSet<>(); + + sqlTypesWithPrecisionOnly.add("VARCHAR"); + sqlTypesWithPrecisionOnly.add("DOUBLE PRECISION"); + + SQL_TYPES_WITH_PRECISION_ONLY = Collections.unmodifiableSet(sqlTypesWithPrecisionOnly); + + Set<String> sqlTypesWithPrecisionAndScale = new HashSet<>(); + + sqlTypesWithPrecisionAndScale.add("DECIMAL"); + sqlTypesWithPrecisionAndScale.add("REAL"); + + SQL_TYPES_WITH_PRECISION_AND_SCALE = Collections.unmodifiableSet(sqlTypesWithPrecisionAndScale); + } + + /** */ + private final DataSource dataSrc; + + /** */ + private final long batchSize; + + /** */ + private final IgniteLogger log; + + /** */ + private final Map<Integer, String> cacheIdToUpsertQry = new HashMap<>(); + + /** */ + private final Map<Integer, String> cacheIdToDeleteQry = new HashMap<>(); + + /** */ + private final Map<Integer, Set<String>> cacheIdToPrimaryKeys = new HashMap<>(); + + /** */ + private final Map<Integer, Set<String>> cacheIdToFields = new HashMap<>(); + + /** */ + private final Set<Object> curKeys = new HashSet<>(); + + /** + * @param dataSrc {@link DataSource} - connection pool to PostgreSql + * @param batchSize the number of CDC events to include in a single batch + * @param log the {@link IgniteLogger} instance used for logging CDC processing events + */ + public IgniteToPostgreSqlCdcApplier( + DataSource dataSrc, + long batchSize, + IgniteLogger log + ) { + this.dataSrc = dataSrc; + this.batchSize = batchSize; + this.log = log; + } + + /** + * @param evts an {@link Iterator} of {@link CdcEvent} objects to be applied + * @return the total number of events successfully batched and executed + */ + public long applyEvents(Iterator<CdcEvent> evts) { + Connection conn = null; + + try { Review Comment: `try (Connection conn = dataSrc.getConnection)` - it will close the connection automatically. -- This is an automated message from the Apache Git Service. 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