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gRPC Service Templates

$39

Protocol buffer schemas, service implementations in Python/Go/Node, streaming patterns, and load balancing configs.

📁 21 files

JSONMarkdownYAMLPythonJavaScriptDockerKubernetesAWSNginx

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📁 File Structure 21 files

grpc-service-templates/ ├── LICENSE ├── README.md ├── configs/ │ ├── envoy-load-balancer.yaml │ └── grpc-health-check.yaml ├── free-sample.zip ├── go/ │ ├── client.go │ └── server.go ├── guide/ │ ├── codegen-instructions.md │ ├── load-balancing.md │ └── streaming-patterns.md ├── guides/ │ ├── codegen-instructions.md │ ├── load-balancing.md │ └── streaming-patterns.md ├── index.html ├── node/ │ ├── client.js │ ├── package.json │ └── server.js ├── proto/ │ ├── common.proto │ └── service.proto └── python/ ├── client.py └── server.py

📖 Documentation Preview README excerpt

gRPC Service Templates

Production-ready gRPC service templates in Python, Go, and Node.js — with shared protobuf definitions, streaming patterns, load balancing configs, and deep-dive guides.

What's Inside


grpc-service-templates/
├── proto/                          # Shared protobuf definitions
│   ├── common.proto                # Pagination, errors, metadata, health
│   └── service.proto               # CatalogService — all 4 RPC patterns
├── python/
│   ├── server.py                   # Full server with interceptors, health checks
│   └── client.py                   # Client demonstrating all RPC patterns
├── go/
│   ├── server.go                   # Server with graceful shutdown, interceptors
│   └── client.go                   # Client with retry logic, deadline propagation
├── node/
│   ├── server.js                   # Server with dynamic proto loading
│   ├── client.js                   # Client with all streaming patterns
│   └── package.json                # NPM dependencies
├── configs/
│   ├── envoy-load-balancer.yaml    # Envoy L7 proxy for gRPC load balancing
│   └── grpc-health-check.yaml      # Health check configs (K8s, Docker, AWS)
├── guides/
│   ├── streaming-patterns.md       # All 4 patterns: when, why, how
│   ├── load-balancing.md           # Why L4 LBs break gRPC + what to use instead
│   └── codegen-instructions.md     # Exact protoc commands for all 3 languages
├── README.md
└── LICENSE

Features

Protobuf Definitions

Rich domain model: Products with nested messages, enums, maps, oneof, repeated fields
All 4 RPC patterns: Unary, server streaming, client streaming, bidirectional
Standard patterns: FieldMask for partial updates, cursor-based pagination, gRPC health protocol
Well-documented: Every field has a comment explaining its purpose and design rationale

Server Implementations (Python / Go / Node.js)

Feature	Python	Go	Node.js
All 4 RPC patterns	Yes	Yes	Yes
Interceptors / middleware	Logging + auth	Logging + recovery	Logging
Health checking	gRPC health protocol	gRPC health protocol	Custom
Graceful shutdown	SIGTERM handler	SIGTERM + SIGINT	SIGTERM
In-memory data store	Thread-safe dict	sync.RWMutex map	Map
Error handling	gRPC status codes	status.Errorf	Callback errors
Reflection	Yes	Yes	N/A

Configuration

Envoy proxy config: L7 load balancing, health checks, connection pooling, circuit breaking
Health check configs: Ready-to-use for Kubernetes (liveness/readiness probes), Docker Compose, and AWS ECS/ALB

Guides

Streaming Patterns: When to use each pattern, code examples in all 3 languages, anti-patterns to avoid
Load Balancing: Why gRPC breaks L4 load balancers, proxy vs client-side vs service mesh strategies
Code Generation: Step-by-step protoc commands for Python, Go, Node.js, plus Makefile and Buf setup

... continues with setup instructions, usage examples, and more.

📄 Code Sample .py preview

python/client.py """ client.py — Python gRPC client for the CatalogService. Demonstrates: - Unary calls (GetProduct, CreateProduct) - Server streaming (ListProducts, WatchInventory) - Client streaming (BulkCreateProducts) - Bidirectional streaming (SyncCatalog) - Metadata injection (auth tokens) - Deadline/timeout configuration - Error handling with gRPC status codes Prerequisites: pip install grpcio grpcio-tools protobuf Usage: python client.py # Run all demos python client.py --demo unary # Run specific demo python client.py --host 10.0.0.5 # Connect to remote server """ from __future__ import annotations import argparse import logging import os import sys import time from typing import Iterator import grpc # Generated stubs — run protoc first (see guides/codegen-instructions.md) try: import service_pb2 import service_pb2_grpc import common_pb2 except ImportError: print("ERROR: Generated stubs not found. Run protoc first:") print(" python -m grpc_tools.protoc -I ../proto \\") print(" --python_out=. --grpc_python_out=. \\") print(" ../proto/common.proto ../proto/service.proto") sys.exit(1) logger = logging.getLogger(__name__) # ── Configuration ──────────────────────────────────────────────────────── SERVER_HOST = os.environ.get("GRPC_HOST", "localhost") SERVER_PORT = int(os.environ.get("GRPC_PORT", "50051")) # ... 260 more lines ...

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