e721efeb85
At present, the SQL statement used to insert a session attribute record contains a nested select statement that verifies the existence of parent record in the session table. Such approach can be susceptible to deadlocks on certain RDMBSs. This commit optimizes the SQL statement used to insert session attribute so that it doesn't perform a nested select statement. Closes: #1550
= Spring Session image:https://badges.gitter.im/spring-projects/spring-session.svg[link="https://gitter.im/spring-projects/spring-session?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge"] image:https://github.com/spring-projects/spring-session/workflows/CI/badge.svg?branch=master["Build Status", link="https://github.com/spring-projects/spring-session/actions?query=workflow%3ACI"] Spring Session provides an API and implementations for managing a user's session information, while also making it trivial to support clustered sessions without being tied to an application container specific solution. It also provides transparent integration with: * `HttpSession` - allows replacing the `HttpSession` in an application container (i.e. Tomcat) neutral way, with support for providing session IDs in headers to work with RESTful APIs. * `WebSocket` - provides the ability to keep the `HttpSession` alive when receiving WebSocket messages * `WebSession` - allows replacing the Spring WebFlux's `WebSession` in an application container neutral way. == Modules Spring Session consists of the following modules: * Spring Session Core - provides core Spring Session functionalities and APIs * Spring Session Data Redis - provides `SessionRepository` and `ReactiveSessionRepository` implementation backed by Redis and configuration support * Spring Session JDBC - provides `SessionRepository` implementation backed by a relational database and configuration support * Spring Session Hazelcast - provides `SessionRepository` implementation backed by Hazelcast and configuration support == Code of Conduct Please see our https://github.com/spring-projects/.github/blob/master/CODE_OF_CONDUCT.md[code of conduct] == Reporting Security Vulnerabilities Please see our https://github.com/spring-projects/spring-session/security/policy[Security policy]. == Spring Session Project Site You can find the documentation, issue management, support, samples, and guides for using Spring Session at https://projects.spring.io/spring-session/ == License Spring Session is Open Source software released under the https://www.apache.org/licenses/LICENSE-2.0.html[Apache 2.0 license].