EsotericSoftware/kryo
Kryo
Kryo is a Java binary serialization framework and object cloning library used to convert Java objects into a compact binary format and restore them from bytes. It provides a system for creating deep or shallow copies of complex object graphs without requiring binary conversion.
The project utilizes variable-length integer encoding and integer-ID class registration to reduce the size of serialized data. It handles complex object graphs through circular reference tracking to prevent data duplication and infinite loops. To maintain long-term data viability, it includes schema evolution management to support the addition, removal, or renaming of fields in serialized data.
High-performance capabilities include the use of off-heap memory and direct buffers for low-level memory IO. The framework also incorporates object pooling to reuse non-thread-safe instances and imposes deserialization size limits on collections and arrays to prevent memory exhaustion.
The system allows for extensibility through custom serialization logic and specialized object instantiation for classes lacking zero-argument constructors.
Features
- Binary Serialization Formats - Provides a high-performance binary serialization framework for converting Java objects to and from compact binary formats.
- Binary Serialization - Converts Java objects into a compact binary format for efficient data storage or transmission.
- Custom Serializer Implementations - Enables the definition of specific read and write logic for classes via custom serializer implementations.
- Schema Evolution - Maintains backward and forward compatibility by allowing fields to be added, renamed, or removed in serialized data.
- Object Cloning Techniques - Creates deep or shallow copies of object graphs without requiring intermediate binary conversion.
- Deep Copying Libraries - Implements a specialized system for creating deep or shallow copies of complex Java object graphs.
- Reference Tracking - Tracks object identities during serialization to handle circular dependencies and prevent data duplication.
- Class-to-Serializer Registries - Provides a configurable registry to map specific classes to dedicated read and write serialization logic.
- Variable-Width Integer Encodings - Employs variable-width integer encoding to represent numbers using fewer bytes and reduce binary size.
- Deep Class Instance Cloning - Creates full independent copies of complex Java object graphs to avoid modifying original instances.
- Direct Buffer Processing - Utilizes direct memory buffers to increase data throughput and bypass standard Java heap overhead.
- High-Performance Binary Data Transfer - Reduces latency and bandwidth usage by utilizing variable-length encoding and optimized memory access.
- Direct Memory Access - Provides direct memory access capabilities to read and write data using native buffers for increased throughput.
- Low-Level Memory IO - Utilizes low-level memory access to accelerate the serialization of large primitive arrays.
- Serializer Registrations - Associates specific classes with custom serialization logic through explicit registration or default strategies.
- Integer-ID Class Mappings - Reduces serialized data size by mapping fully qualified class names to small integer identifiers.
- Class Registration Optimizations - Maps fully qualified class names to small integer identifiers to significantly reduce the serialized data size.
- Direct Memory Serializers - Uses off-heap memory and direct buffers to bypass heap overhead and increase data throughput.
- Custom Object Instantiation - Allows defining custom instantiation logic to support classes that lack zero-argument constructors during deserialization.
- Object Pooling - Reuses non-thread-safe serialization instances via object pooling to minimize garbage collection overhead.
- JSON - 快速且自动化的对象序列化库。
- Serialization Formats - Efficient object graph serialization for Java applications.
- Data Serialization - Fast and efficient Java serialization and cloning library.
- Serialization - Fast and efficient object graph serialization.
- Serialization and Communication - Fast and efficient object graph serialization for Java.
- Serialization and I/O - Fast and efficient framework for object graph serialization.
