proxysql/lib/Cache_Tool_Handler.cpp

#ifdef PROXYSQLGENAI

#include "proxysql.h"

#include "../deps/json/json.hpp"
using json = nlohmann::json;
#define PROXYJSON

#include "Cache_Tool_Handler.h"
#include "MCP_Thread.h"
#include "proxysql_debug.h"

Cache_Tool_Handler::Cache_Tool_Handler(MCP_Threads_Handler* handler)
	: mcp_handler(handler)
{
	pthread_mutex_init(&handler_lock, NULL);
	proxy_debug(PROXY_DEBUG_GENERIC, 3, "Cache_Tool_Handler created\n");
}

Cache_Tool_Handler::~Cache_Tool_Handler() {
	close();
	pthread_mutex_destroy(&handler_lock);
	proxy_debug(PROXY_DEBUG_GENERIC, 3, "Cache_Tool_Handler destroyed\n");
}

int Cache_Tool_Handler::init() {
	proxy_info("Cache_Tool_Handler initialized\n");
	return 0;
}

void Cache_Tool_Handler::close() {
	proxy_debug(PROXY_DEBUG_GENERIC, 2, "Cache_Tool_Handler closed\n");
}

json Cache_Tool_Handler::get_tool_list() {
	json tools = json::array();

	// Stub tools for cache management
	tools.push_back(create_tool_description(
		"get_cache_stats",
		"Get ProxySQL query cache statistics",
		{
			{"type", "object"},
			{"properties", {}}
		}
	));

	tools.push_back(create_tool_description(
		"invalidate_cache",
		"Invalidate specific cache entries",
		{
			{"type", "object"},
			{"properties", {
				{"pattern", {
					{"type", "string"},
					{"description", "Pattern matching queries to invalidate"}
				}}
			}},
			{"required", {"pattern"}}
		}
	));

	tools.push_back(create_tool_description(
		"set_cache_ttl",
		"Set time-to-live for cache entries",
		{
			{"type", "object"},
			{"properties", {
				{"ttl_ms", {
					{"type", "integer"},
					{"description", "TTL in milliseconds"}
				}}
			}},
			{"required", {"ttl_ms"}}
		}
	));

	tools.push_back(create_tool_description(
		"clear_cache",
		"Clear all entries from the query cache",
		{
			{"type", "object"},
			{"properties", {}}
		}
	));

	tools.push_back(create_tool_description(
		"warm_cache",
		"Warm up cache with specified queries",
		{
			{"type", "object"},
			{"properties", {
				{"queries", {
					{"type", "array"},
					{"description", "Array of SQL queries to execute"}
				}}
			}},
			{"required", {"queries"}}
		}
	));

	tools.push_back(create_tool_description(
		"get_cache_entries",
		"List currently cached queries",
		{
			{"type", "object"},
			{"properties", {
				{"limit", {
					{"type", "integer"},
					{"description", "Maximum number of entries to return"}
				}}
			}}
		}
	));

	json result;
	result["tools"] = tools;
	return result;
}

json Cache_Tool_Handler::get_tool_description(const std::string& tool_name) {
	json tools_list = get_tool_list();
	for (const auto& tool : tools_list["tools"]) {
		if (tool["name"] == tool_name) {
			return tool;
		}
	}
	return create_error_response("Tool not found: " + tool_name);
}

json Cache_Tool_Handler::execute_tool(const std::string& tool_name, const json& arguments) {
	pthread_mutex_lock(&handler_lock);

	json result;

	// Stub implementation - returns placeholder responses
	if (tool_name == "get_cache_stats") {
		result = create_success_response(json{
			{"message", "get_cache_stats functionality to be implemented"},
			{"stats", {
				{"entries", 0},
				{"hit_rate", 0.0},
				{"memory_usage", 0}
			}}
		});
	} else if (tool_name == "invalidate_cache") {
		std::string pattern = arguments.value("pattern", "");
		result = create_success_response(json{
			{"message", "invalidate_cache functionality to be implemented"},
			{"pattern", pattern}
		});
	} else if (tool_name == "set_cache_ttl") {
		int ttl_ms = arguments.value("ttl_ms", 0);
		result = create_success_response(json{
			{"message", "set_cache_ttl functionality to be implemented"},
			{"ttl_ms", ttl_ms}
		});
	} else if (tool_name == "clear_cache") {
		result = create_success_response(json{
			{"message", "clear_cache functionality to be implemented"}
		});
	} else if (tool_name == "warm_cache") {
		json queries = arguments.value("queries", json::array());
		result = create_success_response(json{
			{"message", "warm_cache functionality to be implemented"},
			{"query_count", queries.size()}
		});
	} else if (tool_name == "get_cache_entries") {
		int limit = arguments.value("limit", 100);
		result = create_success_response(json{
			{"message", "get_cache_entries functionality to be implemented"},
			{"entries", json::array()},
			{"limit", limit}
		});
	} else {
		result = create_error_response("Unknown tool: " + tool_name);
	}

	pthread_mutex_unlock(&handler_lock);
	return result;
}

#endif /* PROXYSQLGENAI */