redis/lettuce

Features

• Redis Clients - A non-blocking, thread-safe Redis client library for Java supporting synchronous, asynchronous, and reactive models.
• Redis Drivers - Sends Redis commands asynchronously and returns RedisFuture objects for non-blocking completion handling.
• Redis - Discovers the current Redis master through Sentinel nodes and maintains the connection.
• Reactive Programming Models - Builds non-blocking Redis workflows with reactive streams for backpressure-aware data processing.
• Primary-Replica Replication - Establishes connections to Redis master and replicas, routing commands by role.
• Reactive Redis Query Executors - Issues Redis commands reactively, returning Mono/Flux streams for non-blocking, backpressure-aware processing.
• Cluster Clients - Executes commands across a Redis Cluster with automatic slot routing, redirect handling, and topology discovery.
• Cluster Connectivity - Distributes commands across cluster nodes and handles slot redirections automatically.
• Pub/Sub Clients - Provides a Redis pub/sub client for subscribing to channels and receiving real-time messages.
• Sentinel Clients - Discovers the current master through Sentinel nodes and maintains connections during automatic failover.
• Client Failover Integrations - Connects to Redis via Sentinel for automatic master discovery and failover in high-availability setups.
• Slot-Based Routing - Routes commands by hash slot across Redis Cluster nodes, handling MOVED and ASK redirects transparently.
• Redis Connection Authentications - Ships built-in authentication for Redis connections supporting username/password and token-based credentials at connection time.
• Connection Models - Provides a single thread-safe connection that handles all command execution models without blocking.
• Reactive Stream Integrations - Wraps Redis responses in Project Reactor's Mono and Flux types for non-blocking, backpressure-aware data processing.
• Data Serialization Codecs - Transforms Java objects to Redis wire format using pluggable serializers for UTF-8, JSON, or binary content.
• Pluggable Serializers - Transforms Java objects to Redis wire format through configurable serializers supporting UTF-8, JSON, and binary encoding.
• Full Text Search - Provides full-text search capabilities including term, phrase, boolean, wildcard, and fuzzy queries on indexed Redis documents.
• Result Streaming - Streams large Redis collection results incrementally via callbacks to avoid heap memory exhaustion.
• Read Replica Routing Preferences - Selects which nodes handle read operations to balance consistency, latency, and availability.
• Cluster Topology Management - Updates the cluster node map periodically or adaptively in response to redirects and disconnects.
• Search Clients - Ships a Redis search client that creates indexes and runs full-text, vector, geospatial, and auto-complete queries.
• Index Definitions - Defines which fields and data sources to index, enabling full-text, numeric, tag, geo, and vector searches on Redis documents.
• Topology Discoverers - Discovers the current Redis master through Sentinel nodes and maintains automatic failover and topology updates.
• Vector Similarity Search - Finds semantically similar documents by comparing query embeddings against indexed vector fields using configurable distance metrics.
• Callback-Based Data Streaming - Streams large Redis collection results through callback interfaces as data arrives.
• Publish-Subscribe Messaging - Broadcasts messages to channels and receives messages from subscribed channels using a listener pattern.
• Pub-Sub Subscriptions - Registers a listener to receive messages published to Redis channels, enabling real-time messaging patterns.
• Transport Abstractions - Switches network I/O to platform-specific JNI transports like epoll or io_uring for higher throughput.
• Reactive Command Composers - Composes multiple Redis operations by flat-mapping over reactive types for non-blocking chaining.
• Future-Based Concurrency Frameworks - Returns RedisFuture objects from asynchronous commands for non-blocking completion handling and chaining.

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