[GitHub] [incubator-seatunnel] Hisoka-X commented on a diff in pull request #2832: [Feature][Connector-V2] add tdengine source

[GitBox <gi...@apache.org>]

Hisoka-X commented on code in PR #2832:
URL: https://github.com/apache/incubator-seatunnel/pull/2832#discussion_r1003954814


##########
seatunnel-connectors-v2/connector-tdengine/src/main/java/org/apache/seatunnel/connectors/seatunnel/tdengine/sink/TDengineSinkWriter.java:
##########
@@ -0,0 +1,116 @@
+/*
+ * 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.seatunnel.connectors.seatunnel.tdengine.sink;
+
+import org.apache.seatunnel.api.table.type.SeaTunnelRow;
+import org.apache.seatunnel.api.table.type.SeaTunnelRowType;
+import org.apache.seatunnel.connectors.seatunnel.common.sink.AbstractSinkWriter;
+import org.apache.seatunnel.connectors.seatunnel.tdengine.config.TDengineSourceConfig;
+
+import org.apache.seatunnel.shade.com.typesafe.config.Config;
+
+import com.google.common.base.Throwables;
+import com.google.common.collect.Lists;
+import com.taosdata.jdbc.TSDBDriver;
+import lombok.SneakyThrows;
+import org.apache.commons.lang3.ArrayUtils;
+import org.apache.commons.lang3.StringUtils;
+
+import java.io.IOException;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Objects;
+import java.util.Properties;
+
+public class TDengineSinkWriter extends AbstractSinkWriter<SeaTunnelRow, Void> {
+
+    private static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS");
+    private final SeaTunnelRowType seaTunnelRowType;
+    private final Connection conn;
+    private final TDengineSourceConfig config;
+    private int tagsNum;
+
+    @SneakyThrows
+    public TDengineSinkWriter(Config pluginConfig, SeaTunnelRowType seaTunnelRowType) {
+        this.seaTunnelRowType = seaTunnelRowType;
+        this.tagsNum = pluginConfig.hasPath("tags") ? pluginConfig.getObject("tags").size() : 0;
+
+        config = TDengineSourceConfig.buildSourceConfig(pluginConfig);
+        String jdbcUrl = StringUtils.join(config.getUrl(), config.getDatabase(), "?user=", config.getUsername(), "&password=", config.getPassword());
+        Properties connProps = new Properties();
+        connProps.setProperty(TSDBDriver.PROPERTY_KEY_BATCH_LOAD, "true");
+        conn = DriverManager.getConnection(jdbcUrl, connProps);
+    }
+
+    @SneakyThrows
+    @Override
+    @SuppressWarnings("checkstyle:RegexpSingleline")
+    public void write(SeaTunnelRow element) {
+        final ArrayList<Object> tags = Lists.newArrayList();
+        for (int i = element.getArity() - tagsNum; i < element.getArity(); i++) {
+            tags.add(element.getField(i));
+        }
+        final String tagValues = StringUtils.join(convertDataType(tags.toArray()), ",");
+
+        final Object[] metrics = ArrayUtils.subarray(element.getFields(), 1, element.getArity() - tagsNum);
+
+        try (Statement statement = conn.createStatement()) {

Review Comment:
   ```suggestion
           try (Statement statement = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY)) {
   ```
   Use these parameter to save memory.



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