115 lines
4.0 KiB
Python
115 lines
4.0 KiB
Python
import json
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from datetime import datetime
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from pathlib import Path
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from typing import Any, Optional, Dict, List
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from fastmcp import FastMCP
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from pydantic import BaseModel, ValidationError
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class MemoryEntry(BaseModel):
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value: Any
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timestamp: str
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class MemoryServer:
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def __init__(self):
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self.mcp = FastMCP("Memory-Server")
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self.storage_path = Path("./memory_data.json")
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# Register tools
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self.mcp.tool()(self.save)
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self.mcp.tool()(self.get)
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self.mcp.tool()(self.delete)
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self.mcp.tool()(self.list_keys)
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self.mcp.tool()(self.save_with_namespace)
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self.mcp.tool()(self.get_with_namespace)
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self.mcp.tool()(self.delete_with_namespace)
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self.mcp.tool()(self.list_keys_with_namespace)
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def _load_memory(self) -> Dict[str, Dict[str, Any]]:
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"""Загружает память из JSON-файла."""
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if not self.storage_path.exists():
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return {}
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try:
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with open(self.storage_path, "r", encoding="utf-8") as f:
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data = json.load(f)
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# Validate structure
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validated = {}
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for k, v in data.items():
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try:
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entry = MemoryEntry(**v)
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validated[k] = entry.dict()
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except ValidationError:
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# Skip invalid entries
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continue
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return validated
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except (json.JSONDecodeError, OSError):
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return {}
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def _save_memory(self, data: Dict[str, Dict[str, Any]]) -> None:
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"""Сохраняет память в JSON-файл."""
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self.storage_path.parent.mkdir(parents=True, exist_ok=True)
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try:
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with open(self.storage_path, "w", encoding="utf-8") as f:
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json.dump(data, f, indent=2, ensure_ascii=False)
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except OSError as e:
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# Log error if needed
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print(f"Error saving memory: {e}")
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# Core CRUD operations
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def save(self, key: str, value: Any) -> bool:
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"""Сохраняет значение по ключу в память сервера."""
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data = self._load_memory()
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entry = {"value": value, "timestamp": datetime.utcnow().isoformat()}
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data[key] = entry
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self._save_memory(data)
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return True
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def get(self, key: str) -> Optional[Dict[str, Any]]:
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"""Возвращает значение по ключу с метаданными."""
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data = self._load_memory()
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entry = data.get(key)
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return entry if entry else None
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def delete(self, key: str) -> bool:
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"""Удаляет ключ из памяти."""
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data = self._load_memory()
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if key in data:
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del data[key]
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self._save_memory(data)
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return True
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return False
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def list_keys(self) -> List[str]:
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"""Возвращает список всех ключей."""
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data = self._load_memory()
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return list(data.keys())
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# Namespace-aware operations
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def _compose_key(self, namespace: str, key: str) -> str:
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return f"{namespace}:{key}"
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def save_with_namespace(self, namespace: str, key: str, value: Any) -> bool:
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composite = self._compose_key(namespace, key)
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return self.save(composite, value)
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def get_with_namespace(self, namespace: str, key: str) -> Optional[Dict[str, Any]]:
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composite = self._compose_key(namespace, key)
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return self.get(composite)
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def delete_with_namespace(self, namespace: str, key: str) -> bool:
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composite = self._compose_key(namespace, key)
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return self.delete(composite)
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def list_keys_with_namespace(self, namespace: str) -> List[str]:
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data = self._load_memory()
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prefix = f"{namespace}:"
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return [k[len(prefix) :] for k in data.keys() if k.startswith(prefix)]
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if __name__ == "__main__":
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server = MemoryServer()
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print("Starting Memory MCP Server...")
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server.mcp.run() |