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[Feature](cdc) add DB2 database sync (apache#316)
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227
...k-doris-connector/src/main/java/org/apache/doris/flink/tools/cdc/db2/Db2DatabaseSync.java
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| // 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. | ||
|
|
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| package org.apache.doris.flink.tools.cdc.db2; | ||
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| import org.apache.flink.api.common.eventtime.WatermarkStrategy; | ||
| import org.apache.flink.cdc.connectors.base.options.JdbcSourceOptions; | ||
| import org.apache.flink.cdc.connectors.base.options.SourceOptions; | ||
| import org.apache.flink.cdc.connectors.base.options.StartupOptions; | ||
| import org.apache.flink.cdc.connectors.base.source.jdbc.JdbcIncrementalSource; | ||
| import org.apache.flink.cdc.connectors.db2.Db2Source; | ||
| import org.apache.flink.cdc.connectors.db2.source.Db2SourceBuilder; | ||
| import org.apache.flink.cdc.debezium.DebeziumDeserializationSchema; | ||
| import org.apache.flink.cdc.debezium.DebeziumSourceFunction; | ||
| import org.apache.flink.cdc.debezium.JsonDebeziumDeserializationSchema; | ||
| import org.apache.flink.cdc.debezium.table.DebeziumOptions; | ||
| import org.apache.flink.configuration.ConfigOption; | ||
| import org.apache.flink.configuration.ConfigOptions; | ||
| import org.apache.flink.streaming.api.datastream.DataStreamSource; | ||
| import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; | ||
| import org.apache.flink.util.Preconditions; | ||
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| import org.apache.doris.flink.catalog.doris.DataModel; | ||
| import org.apache.doris.flink.tools.cdc.DatabaseSync; | ||
| import org.apache.doris.flink.tools.cdc.SourceSchema; | ||
| import org.apache.doris.flink.tools.cdc.deserialize.DorisJsonDebeziumDeserializationSchema; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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|
||
| import java.sql.Connection; | ||
| import java.sql.DatabaseMetaData; | ||
| import java.sql.DriverManager; | ||
| import java.sql.ResultSet; | ||
| import java.sql.SQLException; | ||
| import java.util.ArrayList; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Properties; | ||
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|
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| import static org.apache.flink.cdc.connectors.base.options.JdbcSourceOptions.CONNECTION_POOL_SIZE; | ||
| import static org.apache.flink.cdc.connectors.base.options.JdbcSourceOptions.CONNECT_MAX_RETRIES; | ||
| import static org.apache.flink.cdc.connectors.base.options.JdbcSourceOptions.CONNECT_TIMEOUT; | ||
| import static org.apache.flink.cdc.connectors.base.options.JdbcSourceOptions.SERVER_TIME_ZONE; | ||
| import static org.apache.flink.cdc.connectors.base.options.SourceOptions.CHUNK_META_GROUP_SIZE; | ||
| import static org.apache.flink.cdc.connectors.base.options.SourceOptions.SCAN_INCREMENTAL_SNAPSHOT_CHUNK_SIZE; | ||
| import static org.apache.flink.cdc.connectors.base.options.SourceOptions.SCAN_SNAPSHOT_FETCH_SIZE; | ||
| import static org.apache.flink.cdc.connectors.base.options.SourceOptions.SPLIT_KEY_EVEN_DISTRIBUTION_FACTOR_LOWER_BOUND; | ||
| import static org.apache.flink.cdc.connectors.base.options.SourceOptions.SPLIT_KEY_EVEN_DISTRIBUTION_FACTOR_UPPER_BOUND; | ||
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|
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| public class Db2DatabaseSync extends DatabaseSync { | ||
| public static final ConfigOption<Integer> PORT = | ||
| ConfigOptions.key("port") | ||
| .intType() | ||
| .defaultValue(50000) | ||
| .withDescription("Integer port number of the DB2 database server."); | ||
| private static final Logger LOG = LoggerFactory.getLogger(Db2DatabaseSync.class); | ||
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| private static final String JDBC_URL = "jdbc:db2://%s:%d/%s"; | ||
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| public Db2DatabaseSync() throws SQLException { | ||
| super(); | ||
| } | ||
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| @Override | ||
| public void registerDriver() throws SQLException { | ||
| try { | ||
| Class.forName("com.ibm.db2.jcc.DB2Driver"); | ||
| LOG.info(" Loaded the JDBC driver"); | ||
| } catch (ClassNotFoundException ex) { | ||
| throw new SQLException( | ||
| "No suitable driver found, can not found class com.ibm.db2.jcc.DB2Driver"); | ||
| } | ||
| } | ||
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| @Override | ||
| public Connection getConnection() throws SQLException { | ||
| String jdbcUrl = | ||
| String.format( | ||
| JDBC_URL, | ||
| config.get(JdbcSourceOptions.HOSTNAME), | ||
| config.get(PORT), | ||
| config.get(JdbcSourceOptions.DATABASE_NAME)); | ||
| Properties pro = new Properties(); | ||
| pro.setProperty("user", config.get(JdbcSourceOptions.USERNAME)); | ||
| pro.setProperty("password", config.get(JdbcSourceOptions.PASSWORD)); | ||
| return DriverManager.getConnection(jdbcUrl, pro); | ||
| } | ||
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| @Override | ||
| public List<SourceSchema> getSchemaList() throws Exception { | ||
| String databaseName = config.get(JdbcSourceOptions.DATABASE_NAME); | ||
| String schemaName = config.get(JdbcSourceOptions.SCHEMA_NAME); | ||
| List<SourceSchema> schemaList = new ArrayList<>(); | ||
| LOG.info("database-name {}, schema-name {}", databaseName, schemaName); | ||
| try (Connection conn = getConnection()) { | ||
| DatabaseMetaData metaData = conn.getMetaData(); | ||
| try (ResultSet tables = | ||
| metaData.getTables(null, schemaName, "%", new String[] {"TABLE"})) { | ||
| while (tables.next()) { | ||
| String tableName = tables.getString("TABLE_NAME"); | ||
| String tableComment = tables.getString("REMARKS"); | ||
| if (!isSyncNeeded(tableName)) { | ||
| continue; | ||
| } | ||
| SourceSchema sourceSchema = | ||
| new Db2Schema( | ||
| metaData, databaseName, schemaName, tableName, tableComment); | ||
| sourceSchema.setModel( | ||
| !sourceSchema.primaryKeys.isEmpty() | ||
| ? DataModel.UNIQUE | ||
| : DataModel.DUPLICATE); | ||
| schemaList.add(sourceSchema); | ||
| } | ||
| } | ||
| } | ||
| return schemaList; | ||
| } | ||
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| @Override | ||
| public DataStreamSource<String> buildCdcSource(StreamExecutionEnvironment env) { | ||
| String databaseName = config.get(JdbcSourceOptions.DATABASE_NAME); | ||
| String schemaName = config.get(JdbcSourceOptions.SCHEMA_NAME); | ||
| Preconditions.checkNotNull(databaseName, "database-name in DB2 is required"); | ||
| Preconditions.checkNotNull(schemaName, "schema-name in DB2 is required"); | ||
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| String tableName = config.get(JdbcSourceOptions.TABLE_NAME); | ||
| String hostname = config.get(JdbcSourceOptions.HOSTNAME); | ||
| Integer port = config.get(PORT); | ||
| String username = config.get(JdbcSourceOptions.USERNAME); | ||
| String password = config.get(JdbcSourceOptions.PASSWORD); | ||
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| StartupOptions startupOptions = StartupOptions.initial(); | ||
| String startupMode = config.get(SourceOptions.SCAN_STARTUP_MODE); | ||
| if ("initial".equalsIgnoreCase(startupMode)) { | ||
| startupOptions = StartupOptions.initial(); | ||
| } else if ("latest-offset".equalsIgnoreCase(startupMode)) { | ||
| startupOptions = StartupOptions.latest(); | ||
| } | ||
|
|
||
| // debezium properties set | ||
| Properties debeziumProperties = new Properties(); | ||
| debeziumProperties.putAll(Db2DateConverter.DEFAULT_PROPS); | ||
| debeziumProperties.put("decimal.handling.mode", "string"); | ||
|
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| for (Map.Entry<String, String> entry : config.toMap().entrySet()) { | ||
| String key = entry.getKey(); | ||
| String value = entry.getValue(); | ||
| if (key.startsWith(DebeziumOptions.DEBEZIUM_OPTIONS_PREFIX)) { | ||
| debeziumProperties.put( | ||
| key.substring(DebeziumOptions.DEBEZIUM_OPTIONS_PREFIX.length()), value); | ||
| } | ||
| } | ||
|
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| DebeziumDeserializationSchema<String> schema; | ||
| if (ignoreDefaultValue) { | ||
| schema = new DorisJsonDebeziumDeserializationSchema(); | ||
| } else { | ||
| Map<String, Object> customConverterConfigs = new HashMap<>(); | ||
| schema = new JsonDebeziumDeserializationSchema(false, customConverterConfigs); | ||
| } | ||
|
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| if (config.getBoolean(SourceOptions.SCAN_INCREMENTAL_SNAPSHOT_ENABLED, true)) { | ||
| JdbcIncrementalSource<String> db2IncrementalSource = | ||
| Db2SourceBuilder.Db2IncrementalSource.<String>builder() | ||
| .hostname(hostname) | ||
| .port(port) | ||
| .databaseList(databaseName) | ||
| .tableList(tableName) | ||
| .username(username) | ||
| .password(password) | ||
| .deserializer(schema) | ||
| .debeziumProperties(debeziumProperties) | ||
| .startupOptions(startupOptions) | ||
| .includeSchemaChanges(true) | ||
| .debeziumProperties(debeziumProperties) | ||
| .serverTimeZone(config.get(SERVER_TIME_ZONE)) | ||
| .splitSize(config.get(SCAN_INCREMENTAL_SNAPSHOT_CHUNK_SIZE)) | ||
| .splitMetaGroupSize(config.get(CHUNK_META_GROUP_SIZE)) | ||
| .fetchSize(config.get(SCAN_SNAPSHOT_FETCH_SIZE)) | ||
| .connectTimeout(config.get(CONNECT_TIMEOUT)) | ||
| .connectionPoolSize(config.get(CONNECTION_POOL_SIZE)) | ||
| .connectMaxRetries(config.get(CONNECT_MAX_RETRIES)) | ||
| .distributionFactorUpper( | ||
| config.get(SPLIT_KEY_EVEN_DISTRIBUTION_FACTOR_UPPER_BOUND)) | ||
| .distributionFactorLower( | ||
| config.get(SPLIT_KEY_EVEN_DISTRIBUTION_FACTOR_LOWER_BOUND)) | ||
| .build(); | ||
| return env.fromSource( | ||
| db2IncrementalSource, WatermarkStrategy.noWatermarks(), "Db2IncrementalSource"); | ||
|
|
||
| } else { | ||
| DebeziumSourceFunction<String> db2Source = | ||
| Db2Source.<String>builder() | ||
| .hostname(hostname) | ||
| .port(port) | ||
| .database(databaseName) | ||
| .tableList(tableName) | ||
| .username(username) | ||
| .password(password) | ||
| .debeziumProperties(debeziumProperties) | ||
| .startupOptions(startupOptions) | ||
| .deserializer(schema) | ||
| .build(); | ||
| return env.addSource(db2Source, "Db2 Source"); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public String getTableListPrefix() { | ||
| return config.get(JdbcSourceOptions.SCHEMA_NAME); | ||
| } | ||
| } |
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