2.00.11.1

New Feature

Added new method SimpleDBConnectionPool.

2.00.11.0

Note: The version number of DolphinDB Java API has been adjusted to improve user experience. The new version number aligns with DolphinDB Server 200 and is forward compatible.

New Features

• Added parameter enableSeqNo to the run method of class DBConnection to enable/disable the sequence number tracking (seqNo) feature.
• Added parameter enableLoadBalance to the connect method of class DBConnection to enable/disable load balancing in the high availability mode.
• Added support for the SLF4J logging framework.
• The DURATION data type supports the identifier of trading calendar.
• The PartitionedTableAppender class supports writing data of BLOB type.

Enhancements

• Optimized the behavior of batch writing for MultithreadedTableWriter.
• Refactored public DBConnection(boolean asynchronousTask, boolean useSSL, boolean compress, boolean usePython, boolean isUrgent, boolean isReverseStreaming, SqlStdEnum sqlStd) to private.
• Enhanced error messages for the ThreadPooledClient class when threadCount is negative.
• Updated code usage examples.

Bug Fixes

• Fixed an issue where the toString() method of the ThreadStatus class in the MultithreadedTableWriter did not correctly output the value of sendFailedRows.
• Fixed an issue where communication exceptions occurred when uploading strings with “\0“ during serialized transmission.

1.30.22.4

New Features

• The MultithreadedTableWriter class now supports creating array vectors of the following types: boolean[], byte[], char[], short[], int[], long[], double[], and float[].
• The ThreadPooledClient class now supports a public constructor ThreadPooledClient(int threadCount) that allows the publisher to push streaming data using the connection established by the subscriber.
• The PollingClient class now supports a default constructor PollingClient() that allows the publisher to push streaming data using the connection established by the subscriber.
• New features for the BasicTable class:
  • Adding duplicate columns with addColumn is no longer allowed;
  • The replaceColumn method can replace a single column;
  • The replaceColName method can rename a single column.

Improvements

• Optimized the DBConnection class:
  • Renamed the parameter userID to userId in method login;
  • Renamed method getUserID to getUserId.

Bug Fixes

• Fixed incorrect results returned by method Append for BasicDecimal32Vector, BasicDecimal64Vector, and BasicDecimal128Vector types.
• Fixed an issue where calling setNull on an instance of the BasicSymbolVector class without any null values would cause errors, disconnections, or exceptions when later retrieving data.