Proxy
A proxy is an intermediary object or component that represents another object or system and mediates interactions with it.
Effective Platform Engineering
A proxy server is an intermediary that forwards, filters, modifies, or manages network traffic between applications or services.
- How it is used
- Provides an application-independent integration point for managing communication between services in a service mesh.
- How deep it goes
- Defines traffic handling and compares Kubernetes deployment placements, but does not detail proxy configuration syntax.
- Examples
- Illustrates token validation, connection retries, and encryption between proxies.
- What you can do after
- Evaluate/understand proxy placement against service-specific policy, isolation, and observability needs.
The Joy of JavaScript
A Proxy is a JavaScript object that wraps a target object and intercepts fundamental operations on it through handler traps.
- How it is used
- Applies dynamic weaving to add logging, tracing, caching, masking, instrumentation, and smart-object behavior without changing application implementations.
- How deep it goes
- Explains targets, handlers, get, set, and has traps with examples, while stopping short of covering every available trap.
- Examples
- Demonstrates credential tracing and masking, composed handlers, automatic blockchain block hashing, and revocable validation timing.
- What you can do after
- Build it from scratch using Proxy handlers and Reflect to inject modular behavior around object access and mutation.
Java Persistence with Spring Data and Hibernate epub
A proxy is a substitute object that represents another object and defers or controls access to that object's state or behavior.
- How it is used
- Defers entity and association loading until application code accesses the represented state.
- How deep it goes
- Explains creation, initialization triggers, generated subclasses, detached-state failures, and entity requirements, while deferring broader fetch-plan treatment.
- Examples
- Demonstrates Item and User references, seller loading, class inspection, initialization checks, and bid persistence without SELECT statements.
- What you can do after
- Diagnose lazy-loading behavior, initialize proxies safely, inspect their loaded state, and avoid unnecessary SELECT statements when persisting relationships.
Read how Java Persistence with Spring Data and Hibernate epub explains proxy →
Related concepts
- Spring Data JPAproduced by · Spring Data JPA is a Spring module that provides repository abstractions and query support for accessing relational data through JPA implementations.
- network isolationused by · Network isolation is the restriction or separation of network communication so that systems or processes can communicate only across permitted paths or boundaries.
- trapuses · A JavaScript Proxy trap is a handler function that intercepts a specific operation performed through the proxy.
- Envoyincludes · Envoy is an open-source, high-performance proxy for service-to-service communication, edge traffic management, and distributed application networking.
- routingincludes · Routing is the selection of a path, destination, or processing component to direct an item, request, or flow toward an intended endpoint.
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