Key Features of Oracle WebLogic Server

Full Jakarta EE (formerly Java EE) Platform: WebLogic is a certified, fully-featured application server that supports the entire Jakarta EE specification. This includes APIs for web services (JAX-WS, JAX-RS), persistence (JPA), messaging (JMS), security (JAAS), and more.
Cloud-Native Ready: Supports modern development with MicroProfile, Spring Framework, and other lightweight frameworks, making it suitable for building and deploying cloud-native applications.

JVM Performance: Utilizes the Oracle HotSpot or JRockit JVMs, which are highly optimized for server-side performance, including advanced Just-In-Time (JIT) compilation and garbage collection tuning.
Web Container & EJB Container: Features high-performance, optimized containers for running servlets, JSPs, and Enterprise JavaBeans (EJBs).
Dynamic Clustering: Easily add or remove Managed Servers from a cluster to scale horizontally based on demand. Workload is automatically distributed across the cluster.

Clustering: The cornerstone of HA. Groups multiple WebLogic instances (Managed Servers) to act as a single unit.
In-Memory Session Replication: HTTP sessions and stateful EJB sessions can be automatically and transparently replicated to secondary servers in the cluster. If one server fails, another can take over immediately without losing user state.
Server Migration & Failover: Critical services (like JMS and JTA) can be configured to automatically migrate from a failed server to a healthy one within the cluster.

Web-Based Administration Console: An intuitive graphical user interface (GUI) for configuring, monitoring, and managing all aspects of the server, deployments, and domains.
Scripting with WLST (WebLogic Scripting Tool): A powerful command-line tool based on Jython for automating administrative tasks, which is essential for DevOps and repeatable deployments.
RESTful Management API: Allows for management and monitoring via standard REST calls, enabling easy integration with modern orchestration and monitoring tools.
Node Manager: A dedicated process for robust, out-of-band life cycle management (start, stop, restart) of WebLogic Server instances, which is crucial for ensuring server availability.

Integrated Security Framework: A comprehensive, pluggable security architecture that supports various authentication providers (LDAP, Active Directory, RDBMS, custom).
SSL & Certificate Management: Full support for secure communication with SSL/TLS.
Authorization & Auditing: Fine-grained security policies to control access to resources (EJBs, Web Services) and detailed audit trails for compliance.

JMS (Java Message Service) Implementation: A high-performance, persistent messaging system that supports reliable, asynchronous communication between application components.
Messaging Bridge: Can connect to other JMS providers (like IBM MQ, TIBCO) to enable communication across different messaging systems.
Web Services: Robust support for both SOAP-based and RESTful web services, including WS-* standards for security, reliability, and transactions.

JDBC Connection Pools: Highly efficient management of database connections, with features for testing and resetting connections.
Multi-Data Source: Supports routing database requests across multiple data sources for load balancing or failover.
JTA (Java Transaction API): Provides distributed transaction management, ensuring data integrity across multiple resources (e.g., multiple databases).

Oracle Database: Has optimized, native drivers (Oracle Thin Driver, OCI Driver) and features for enhanced performance and reliability when connecting to Oracle Database.
Oracle Coherence: Seamlessly integrates with Oracle's in-memory data grid, allowing WebLogic applications to leverage distributed caching for extreme scalability.
Oracle Fusion Middleware: Serves as the foundational runtime for other Oracle products like SOA Suite, WebCenter, and Identity Management.

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