MariaDB Connector/J 3.0.0 Release Notes
The most recent Stable (GA) release of MariaDB Connector/J is:
MariaDB Connector/J 3.5.0
Download Release Notes Changelog Connector/J Overview
Release date: 04 May 2021
MariaDB Connector/J 3.0.0 is a Alpha (Alpha) release.
Do not use alpha releases in production!
NOTE: MariaDB Connector/J 3.0.0 is fully compatible with the latest release of version 2.7. Further maintenance releases will not be provided for version 2.7 after MariaDB Connector/J 3.0 becomes stable (GA).
For an overview of MariaDB Connector/J see the About MariaDB Connector/J page
Notable Changes
This version is a complete rewrite of the Java driver. The goal being to have a more performant, easy to read, extendable, small driver.
- Complete rewrite, code simplification / clarification, reduced size (15%), more than 90% coverage tested.
- Performance Improvements:
- Prepare and execution are now using pipelining when using option
useServerPrepStmts
- Performance enhancement with MariaDB 10.6 server when using option
useServerPrepStmts
, skipping metadata (see MDEV-19237)
- Prepare and execution are now using pipelining when using option
SSL configuration
New Options :
sslMode | Indicate SSL demand. Possible values : * 'disable' * 'trust': no certificate to provide and no hostname validation, permit encryption without any validation * 'verify-ca': Encryption, certificates validation, BUT no hostname verification * 'verify-full': Standard SSL use: Encryption, certificate validation, and hostname Default: 'disable' |
---|
The options useSsl
, trustServerCertificate
, and disableSslHostnameVerification
still exist, but sslMode
allows for easier configuration.
Easy logging
If using slf4j
, just enable the package "org.mariadb.jdbc" log.
- Level
ERROR
will log connection errors - Level
WARNING
will log query errors - Level
DEBUG
will log queries - Level
TRACE
will log all exchanges with server
If not using slf4j
, console logging will be used.
If you really want to use the JDK logger, the System property
"mariadb.logging.fallback
" set to JDK
will indicate to use common
logging.
Failover
The Failover implementation now permits redoing transactions : when creating a transaction, all commands will be cached, and can be replayed in case of failover.
This functionality can be enabled using the option transactionReplay
.
This is not enabled by default, because it requires that the application avoid using non-idempotent commands.
Example:
START TRANSACTION; select next_val(hibernate_sequence); INSERT INTO myCar(id, name) VALUE (?, ?) //with parameters: 1, 'car1' INSERT INTO myCarDetail(id, carId, name) VALUE (?, ?, ?) //with parameters: 2, 1, 'detail1' INSERT INTO myCarDetail(id, carId, name) VALUE (?, ?, ?) //with parameters: 3, 2, 'detail2' COMMIT;
Allow setup of socket TCP_KEEPIDLE, TCP_KEEPCOUNT, TCP_KEEPINTERVAL
Equivalent options are tcpKeepIdle
, tcpKeepCount
, tcpKeepInterval
Because these are available only with Java 11, setting these options with java < 11 will have no effect.
permit authentication plugin restriction
New Options :
restrictedAuth | if set, restrict authentication plugin to secure list. Default provided plugins are mysql_native_password,client_ed25519,auth_gssapi_client,caching_sha2_password,dialog and mysql_clear_password Default: null |
---|
example setting restrictedAuth
to "mysql_native_password,client_ed25519,auth_gssapi_client", only those plugins can be use. If server return ask for an authentication plugin not listed in restrictedAuth
, driver will throw an exception.
Extendable
The driver is built with a Service Provider Interface (SPI), permitting easy ways to extend the driver.
Possible extensions:
org.mariadb.jdbc.codec.Codec
: Allows encoding/decoding typesorg.mariadb.jdbc.plugin.authentication.AuthenticationPlugin
: Allows authentication plugin additions. Defaults are "mysql_clear_password", "auth_gssapi_client", "client_ed25519", "mysql_native_password", "dialog" (PAM), and "caching_sha2_password"org.mariadb.jdbc.plugin.credential.CredentialPlugin
: Allows login/password retrieval. Defaults are "AwsIamCredentialPlugin" to permit retrieve a temporary IAM authentication, "EnvCredentialPlugin" to get environment authentication, and "PropertiesCredentialPlugin" to get authentication info from java propertyorg.mariadb.jdbc.plugin.tls.TlsSocketPlugin
: Allows extended TLS implementation
Bugs Fixed
- CONJ-864 -
includeThreadDumpInDeadlockExceptions
always includes the thread dump, even when it is not a deadlock exception - CONJ-858 - Properties parameters that differ from string not taken in account
Changelog
For a complete list of changes made in MariaDB Connector/J 3.0.0, with links to detailed information on each push, see the changelog.