resolve code review suggestions

tdenginereader/doc/tdenginereader-CN.md

@@ -22,7 +22,7 @@ TDengineReader 通过 TDengine 的 JDBC driver 查询获取数据。
         "reader": {
           "name": "tdenginereader",
           "parameter": {
-            "user": "root",
+            "username": "root",
             "password": "taosdata",
             "connection": [
               {
@@ -165,24 +165,8 @@ TDengineReader 通过 TDengine 的 JDBC driver 查询获取数据。
 
 #### 4.1.1 数据特征
 
-建表语句：
-
-单行记录类似于：
-
 #### 4.1.2 机器参数
 
-* 执行DataX的机器参数为:
-    1. cpu:
-    2. mem:
-    3. net: 千兆双网卡
-    4. disc: DataX 数据不落磁盘，不统计此项
-
-* TDengine数据库机器参数为:
-    1. cpu:
-    2. mem:
-    3. net: 千兆双网卡
-    4. disc:
-
 #### 4.1.3 DataX jvm 参数
 
 	-Xms1024m -Xmx1024m -XX:+HeapDumpOnOutOfMemoryError
@@ -201,9 +185,6 @@ TDengineReader 通过 TDengine 的 JDBC driver 查询获取数据。
 
 说明：
 
-1. 这里的单表，主键类型为 bigint(20),自增。
-2. batchSize 和 通道个数，对性能影响较大。
-
 #### 4.2.4 性能测试小结
 
 1.

tdenginereader/src/main/java/com/alibaba/datax/plugin/reader/TDengineReader.java

@@ -93,7 +93,7 @@ public class TDengineReader extends Reader {
             }
             if (start >= end)
                 throw DataXException.asDataXException(TDengineReaderErrorCode.ILLEGAL_VALUE,
-                        "The parameter [" + Key.BEGIN_DATETIME + "] should be less than the parameter [" + Key.END_DATETIME + "].");
+                        "The parameter " + Key.BEGIN_DATETIME + ": " + beginDatetime + " should be less than the parameter " + Key.END_DATETIME + ": " + endDatetime + ".");
 
         }
 
@@ -119,7 +119,6 @@ public class TDengineReader extends Reader {
                 }
             }
 
-            LOG.info("Configuration: {}", configurations);
             return configurations;
         }
     }
@@ -142,15 +141,14 @@ public class TDengineReader extends Reader {
             try {
                 Class.forName("com.taosdata.jdbc.TSDBDriver");
                 Class.forName("com.taosdata.jdbc.rs.RestfulDriver");
-            } catch (ClassNotFoundException e) {
+            } catch (ClassNotFoundException ignored) {
-                e.printStackTrace();
+                LOG.warn(ignored.getMessage(), ignored);
             }
         }
 
         @Override
         public void init() {
             this.readerSliceConfig = super.getPluginJobConf();
-            LOG.info("getPluginJobConf: {}", readerSliceConfig);
 
             String user = readerSliceConfig.getString(Key.USERNAME);
             String password = readerSliceConfig.getString(Key.PASSWORD);
@@ -174,7 +172,12 @@ public class TDengineReader extends Reader {
 
         @Override
         public void destroy() {
-
+            try {
+                if (conn != null)
+                    conn.close();
+            } catch (SQLException e) {
+                LOG.error(e.getMessage(), e);
+            }
         }
 
         @Override
@@ -199,22 +202,15 @@ public class TDengineReader extends Reader {
                 sqlList.addAll(querySql);
             }
 
-            try (Statement stmt = conn.createStatement()) {
             for (String sql : sqlList) {
+                try (Statement stmt = conn.createStatement()) {
                     ResultSet rs = stmt.executeQuery(sql);
                     while (rs.next()) {
                         Record record = buildRecord(recordSender, rs, mandatoryEncoding);
                         recordSender.sendToWriter(record);
                     }
-                }
                 } catch (SQLException e) {
-                throw DataXException.asDataXException(TDengineReaderErrorCode.RUNTIME_EXCEPTION, e.getMessage(), e);
+                    LOG.error(e.getMessage(), e);
-            } finally {
-                try {
-                    if (conn != null)
-                        conn.close();
-                } catch (SQLException e) {
-                    e.printStackTrace();
                 }
             }
         }

tdenginewriter/src/main/java/com/alibaba/datax/plugin/writer/tdenginewriter/Constants.java

@@ -1,8 +1,6 @@
 package com.alibaba.datax.plugin.writer.tdenginewriter;
 
 public class Constants {
-    public static final String DEFAULT_USERNAME = "root";
+    public static final int DEFAULT_BATCH_SIZE = 1000;
-    public static final String DEFAULT_PASSWORD = "taosdata";
-    public static final int DEFAULT_BATCH_SIZE = 1;
     public static final boolean DEFAULT_IGNORE_TAGS_UNMATCHED = false;
 }

tdenginewriter/src/main/java/com/alibaba/datax/plugin/writer/tdenginewriter/DefaultDataHandler.java

@@ -52,14 +52,13 @@ public class DefaultDataHandler implements DataHandler {
         try {
             Class.forName("com.taosdata.jdbc.TSDBDriver");
             Class.forName("com.taosdata.jdbc.rs.RestfulDriver");
-        } catch (ClassNotFoundException e) {
+        } catch (ClassNotFoundException ignored) {
-            e.printStackTrace();
         }
     }
 
     public DefaultDataHandler(Configuration configuration, TaskPluginCollector taskPluginCollector) {
-        this.username = configuration.getString(Key.USERNAME, Constants.DEFAULT_USERNAME);
+        this.username = configuration.getString(Key.USERNAME);
-        this.password = configuration.getString(Key.PASSWORD, Constants.DEFAULT_PASSWORD);
+        this.password = configuration.getString(Key.PASSWORD);
         this.jdbcUrl = configuration.getString(Key.JDBC_URL);
         this.batchSize = configuration.getInt(Key.BATCH_SIZE, Constants.DEFAULT_BATCH_SIZE);
         this.tables = configuration.getList(Key.TABLE, String.class);
@@ -73,14 +72,15 @@ public class DefaultDataHandler implements DataHandler {
         int count = 0;
         int affectedRows = 0;
 
-
         try (Connection conn = DriverManager.getConnection(jdbcUrl, username, password)) {
             LOG.info("connection[ jdbcUrl: " + jdbcUrl + ", username: " + username + "] established.");
+            if (schemaManager == null) {
                 // prepare table_name -> table_meta
                 this.schemaManager = new SchemaManager(conn);
                 this.tableMetas = schemaManager.loadTableMeta(tables);
                 // prepare table_name -> column_meta
                 this.columnMetas = schemaManager.loadColumnMetas(tables);
+            }
 
             List<Record> recordBatch = new ArrayList<>();
             Record record;
@@ -89,10 +89,11 @@ public class DefaultDataHandler implements DataHandler {
                     recordBatch.add(record);
                 } else {
                     try {
-                        affectedRows = writeBatch(conn, recordBatch);
+                        recordBatch.add(record);
-                    } catch (SQLException e) {
+                        affectedRows += writeBatch(conn, recordBatch);
+                    } catch (Exception e) {
                         LOG.warn("use one row insert. because:" + e.getMessage());
-                        affectedRows = writeEachRow(conn, recordBatch);
+                        affectedRows += writeEachRow(conn, recordBatch);
                     }
                     recordBatch.clear();
                 }
@@ -101,10 +102,10 @@ public class DefaultDataHandler implements DataHandler {
 
             if (!recordBatch.isEmpty()) {
                 try {
-                    affectedRows = writeBatch(conn, recordBatch);
+                    affectedRows += writeBatch(conn, recordBatch);
-                } catch (SQLException e) {
+                } catch (Exception e) {
                     LOG.warn("use one row insert. because:" + e.getMessage());
-                    affectedRows = writeEachRow(conn, recordBatch);
+                    affectedRows += writeEachRow(conn, recordBatch);
                 }
                 recordBatch.clear();
             }
@@ -126,8 +127,8 @@ public class DefaultDataHandler implements DataHandler {
             recordList.add(record);
             try {
                 affectedRows += writeBatch(conn, recordList);
-            } catch (SQLException e) {
+            } catch (Exception e) {
-                LOG.error(e.getMessage());
+                LOG.error(e.getMessage(), e);
                 this.taskPluginCollector.collectDirtyRecord(record, e);
             }
         }
@@ -145,7 +146,7 @@ public class DefaultDataHandler implements DataHandler {
      * 3. 对于tb，拼sql，例如：data: [ts, f1, f2, f3, t1, t2] tbColumn: [ts, f1, f2, t1] => insert into tb(ts, f1, f2) values(ts, f1, f2)
      * 4. 对于t，拼sql，例如：data: [ts, f1, f2, f3, t1, t2] tbColumn: [ts, f1, f2, f3, t1, t2] insert into t(ts, f1, f2, f3, t1, t2) values(ts, f1, f2, f3, t1, t2)
      */
-    public int writeBatch(Connection conn, List<Record> recordBatch) throws SQLException {
+    public int writeBatch(Connection conn, List<Record> recordBatch) throws Exception {
         int affectedRows = 0;
         for (String table : tables) {
             TableMeta tableMeta = tableMetas.get(table);
@@ -173,31 +174,62 @@ public class DefaultDataHandler implements DataHandler {
      * record[idx(tbname)] using table tags(record[idx(t1)]) (ts, f1, f2, f3) values(record[idx(ts)], record[idx(f1)], )
      * record[idx(tbname)] using table tags(record[idx(t1)]) (ts, f1, f2, f3) values(record[idx(ts)], record[idx(f1)], )
      */
-    private int writeBatchToSupTableBySQL(Connection conn, String table, List<Record> recordBatch) throws SQLException {
+    private int writeBatchToSupTableBySQL(Connection conn, String table, List<Record> recordBatch) throws Exception {
         List<ColumnMeta> columnMetas = this.columnMetas.get(table);
 
         StringBuilder sb = new StringBuilder("insert into");
         for (Record record : recordBatch) {
             sb.append(" ").append(record.getColumn(indexOf("tbname")).asString())
                     .append(" using ").append(table)
-                    .append(" tags")
+                    .append(" tags");
-                    .append(columnMetas.stream().filter(colMeta -> columns.contains(colMeta.field)).filter(colMeta -> {
+//            sb.append(columnMetas.stream().filter(colMeta -> columns.contains(colMeta.field)).filter(colMeta -> {
-                        return colMeta.isTag;
+//                return colMeta.isTag;
-                    }).map(colMeta -> {
+//            }).map(colMeta -> {
-                        return buildColumnValue(colMeta, record);
+//                return buildColumnValue(colMeta, record);
-                    }).collect(Collectors.joining(",", "(", ")")))
+//            }).collect(Collectors.joining(",", "(", ")")));
-                    .append(" ")
+            sb.append("(");
-                    .append(columnMetas.stream().filter(colMeta -> columns.contains(colMeta.field)).filter(colMeta -> {
+            for (int i = 0; i < columns.size(); i++) {
+                ColumnMeta colMeta = columnMetas.get(i);
+                if (!columns.contains(colMeta.field))
+                    continue;
+                if (!colMeta.isTag)
+                    continue;
+                String tagValue = buildColumnValue(colMeta, record);
+                if (i == 0) {
+                    sb.append(tagValue);
+                } else {
+                    sb.append(",").append(tagValue);
+                }
+            }
+            sb.append(")");
+
+            sb.append(" ").append(columnMetas.stream().filter(colMeta -> columns.contains(colMeta.field)).filter(colMeta -> {
                         return !colMeta.isTag;
                     }).map(colMeta -> {
                         return colMeta.field;
                     }).collect(Collectors.joining(",", "(", ")")))
-                    .append(" values")
+                    .append(" values");
-                    .append(columnMetas.stream().filter(colMeta -> columns.contains(colMeta.field)).filter(colMeta -> {
+
-                        return !colMeta.isTag;
+//            sb.append(columnMetas.stream().filter(colMeta -> columns.contains(colMeta.field)).filter(colMeta -> {
-                    }).map(colMeta -> {
+//                return !colMeta.isTag;
-                        return buildColumnValue(colMeta, record);
+//            }).map(colMeta -> {
-                    }).collect(Collectors.joining(",", "(", ")")));
+//                return buildColumnValue(colMeta, record);
+//            }).collect(Collectors.joining(",", "(", ")")));
+            sb.append("(");
+            for (int i = 0; i < columnMetas.size(); i++) {
+                ColumnMeta colMeta = columnMetas.get(i);
+                if (!columns.contains(colMeta.field))
+                    continue;
+                if (colMeta.isTag)
+                    continue;
+                String colValue = buildColumnValue(colMeta, record);
+                if (i == 0) {
+                    sb.append(colValue);
+                } else {
+                    sb.append(",").append(colValue);
+                }
+            }
+            sb.append(")");
         }
         String sql = sb.toString();
 
@@ -213,10 +245,11 @@ public class DefaultDataHandler implements DataHandler {
         return count;
     }
 
-    private String buildColumnValue(ColumnMeta colMeta, Record record) {
+    private String buildColumnValue(ColumnMeta colMeta, Record record) throws Exception {
         Column column = record.getColumn(indexOf(colMeta.field));
         TimestampPrecision timestampPrecision = schemaManager.loadDatabasePrecision();
-        switch (column.getType()) {
+        Column.Type type = column.getType();
+        switch (type) {
             case DATE: {
                 Date value = column.asDate();
                 switch (timestampPrecision) {
@@ -243,8 +276,9 @@ public class DefaultDataHandler implements DataHandler {
             case DOUBLE:
             case INT:
             case LONG:
+                column.asString();
             default:
-                return column.asString();
+                throw new Exception("invalid column type: " + type);
         }
     }
 
@@ -392,7 +426,7 @@ public class DefaultDataHandler implements DataHandler {
      * else
      * insert into tb1 (ts, f1, f2) values( record[idx(ts)], record[idx(f1)], record[idx(f2)])
      */
-    private int writeBatchToSubTable(Connection conn, String table, List<Record> recordBatch) throws SQLException {
+    private int writeBatchToSubTable(Connection conn, String table, List<Record> recordBatch) throws Exception {
         List<ColumnMeta> columnMetas = this.columnMetas.get(table);
 
         StringBuilder sb = new StringBuilder();
@@ -419,11 +453,25 @@ public class DefaultDataHandler implements DataHandler {
             if (ignoreTagsUnmatched && !tagsAllMatch)
                 continue;
 
-            sb.append(columnMetas.stream().filter(colMeta -> columns.contains(colMeta.field)).filter(colMeta -> {
+//            sb.append(columnMetas.stream().filter(colMeta -> columns.contains(colMeta.field)).filter(colMeta -> {
-                return !colMeta.isTag;
+//                return !colMeta.isTag;
-            }).map(colMeta -> {
+//            }).map(colMeta -> {
-                return buildColumnValue(colMeta, record);
+//                return buildColumnValue(colMeta, record);
-            }).collect(Collectors.joining(", ", "(", ") ")));
+//            }).collect(Collectors.joining(", ", "(", ") ")));
+            sb.append("(");
+            for (int i = 0; i < columnMetas.size(); i++) {
+                ColumnMeta colMeta = columnMetas.get(i);
+                if (colMeta.isTag)
+                    continue;
+                String colValue = buildColumnValue(colMeta, record);
+                if (i == 0) {
+                    sb.append(colValue);
+                } else {
+                    sb.append(",").append(colValue);
+                }
+            }
+            sb.append(")");
+
             validRecords++;
         }
 
@@ -462,7 +510,7 @@ public class DefaultDataHandler implements DataHandler {
      * table: ["weather"], column: ["ts, f1, f2, f3, t1, t2"]
      * sql: insert into weather (ts, f1, f2, f3, t1, t2) values( record[idx(ts), record[idx(f1)], ...)
      */
-    private int writeBatchToNormalTable(Connection conn, String table, List<Record> recordBatch) throws SQLException {
+    private int writeBatchToNormalTable(Connection conn, String table, List<Record> recordBatch) throws Exception {
         List<ColumnMeta> columnMetas = this.columnMetas.get(table);
 
         StringBuilder sb = new StringBuilder();
@@ -474,9 +522,22 @@ public class DefaultDataHandler implements DataHandler {
                 .append(" values ");
 
         for (Record record : recordBatch) {
-            sb.append(columnMetas.stream().filter(colMeta -> columns.contains(colMeta.field)).map(colMeta -> {
+//            sb.append(columnMetas.stream().filter(colMeta -> columns.contains(colMeta.field)).map(colMeta -> {
-                return buildColumnValue(colMeta, record);
+//                return buildColumnValue(colMeta, record);
-            }).collect(Collectors.joining(",", "(", ")")));
+//            }).collect(Collectors.joining(",", "(", ")")));
+            sb.append("(");
+            for (int i = 0; i < columnMetas.size(); i++) {
+                ColumnMeta colMeta = columnMetas.get(i);
+                if (!columns.contains(colMeta.field))
+                    continue;
+                String colValue = buildColumnValue(colMeta, record);
+                if (i == 0) {
+                    sb.append(colValue);
+                } else {
+                    sb.append(",").append(colValue);
+                }
+            }
+            sb.append(")");
         }
 
         String sql = sb.toString();

tdenginewriter/src/main/java/com/alibaba/datax/plugin/writer/tdenginewriter/SchemaManager.java

@@ -10,6 +10,7 @@ import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.*;
+import java.util.stream.Collectors;
 
 public class SchemaManager {
     private static final Logger LOG = LoggerFactory.getLogger(SchemaManager.class);
@@ -123,12 +124,14 @@ public class SchemaManager {
                         }
                     }
                 } catch (SQLException e) {
-                    e.printStackTrace();
+                    LOG.error(e.getMessage(), e);
                 }
                 colMeta.value = value;
             });
 
-            LOG.debug("load column metadata of " + table + ": " + Arrays.toString(columnMetaList.toArray()));
+            LOG.debug("load column metadata of " + table + ": " +
+                    columnMetaList.stream().map(ColumnMeta::toString).collect(Collectors.joining(",", "[", "]"))
+            );
             ret.put(table, columnMetaList);
         }
         return ret;
@@ -142,7 +145,9 @@ public class SchemaManager {
         tableMeta.tags = rs.getInt("tags");
         tableMeta.tables = rs.getInt("tables");
 
+        if (LOG.isDebugEnabled()){
             LOG.debug("load table metadata of " + tableMeta.tbname + ": " + tableMeta);
+        }
         return tableMeta;
     }
 

tdenginewriter/src/main/java/com/alibaba/datax/plugin/writer/tdenginewriter/TDengineWriterErrorCode.java

@@ -4,10 +4,10 @@ import com.alibaba.datax.common.spi.ErrorCode;
 
 public enum TDengineWriterErrorCode implements ErrorCode {
 
-    REQUIRED_VALUE("TDengineWriter-00", "缺失必要的值"),
+    REQUIRED_VALUE("TDengineWriter-00", "parameter value is missing"),
-    ILLEGAL_VALUE("TDengineWriter-01", "值非法"),
+    ILLEGAL_VALUE("TDengineWriter-01", "invalid parameter value"),
-    RUNTIME_EXCEPTION("TDengineWriter-02", "运行时异常"),
+    RUNTIME_EXCEPTION("TDengineWriter-02", "runtime exception"),
-    TYPE_ERROR("TDengineWriter-03", "Datax类型无法正确映射到TDengine类型");
+    TYPE_ERROR("TDengineWriter-03", "data type mapping error");
 
     private final String code;
     private final String description;

tdenginewriter/src/test/java/com/alibaba/datax/plugin/writer/tdenginewriter/DefaultDataHandlerTest.java

@@ -28,7 +28,7 @@ public class DefaultDataHandlerTest {
     private final TaskPluginCollector taskPluginCollector = new TDengineWriter.Task().getTaskPluginCollector();
 
     @Test
-    public void writeSupTableBySQL() throws SQLException {
+    public void writeSupTableBySQL() throws Exception {
         // given
         createSupAndSubTable();
         Configuration configuration = Configuration.from("{" +
@@ -68,7 +68,7 @@ public class DefaultDataHandlerTest {
     }
 
     @Test
-    public void writeSupTableBySQL_2() throws SQLException {
+    public void writeSupTableBySQL_2() throws Exception {
         // given
         createSupAndSubTable();
         Configuration configuration = Configuration.from("{" +
@@ -106,7 +106,7 @@ public class DefaultDataHandlerTest {
     }
 
     @Test
-    public void writeSupTableBySchemaless() throws SQLException {
+    public void writeSupTableBySchemaless() throws Exception {
         // given
         createSupTable();
         Configuration configuration = Configuration.from("{" +
@@ -146,7 +146,7 @@ public class DefaultDataHandlerTest {
     }
 
     @Test
-    public void writeSubTableWithTableName() throws SQLException {
+    public void writeSubTableWithTableName() throws Exception {
         // given
         createSupAndSubTable();
         Configuration configuration = Configuration.from("{" +
@@ -185,7 +185,7 @@ public class DefaultDataHandlerTest {
     }
 
     @Test
-    public void writeSubTableWithoutTableName() throws SQLException {
+    public void writeSubTableWithoutTableName() throws Exception {
         // given
         createSupAndSubTable();
         Configuration configuration = Configuration.from("{" +
@@ -224,7 +224,7 @@ public class DefaultDataHandlerTest {
     }
 
     @Test
-    public void writeNormalTable() throws SQLException {
+    public void writeNormalTable() throws Exception {
         // given
         createSupAndSubTable();
         Configuration configuration = Configuration.from("{" +