164 lines
5.8 KiB
Python
164 lines
5.8 KiB
Python
import logging
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import time
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import threading
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from plc_manager import PLCManager
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from cache_manager import CacheManager
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from api_server import APIServer
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from config_manager import ConfigManager
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from plc_data_reader import PLCDataReaderThread
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class GatewayApp:
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"""PLC网关应用程序主类"""
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def __init__(self, config_path="../config/config.json"):
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self.config_path = config_path
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self.config_manager = ConfigManager(config_path)
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self.plc_manager = None
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self.cache_manager = None
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self.api_server = None
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self.reload_flag = False
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self.reload_lock = threading.Lock()
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self.logger = logging.getLogger("GatewayApp")
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# 存储所有读取线程（便于配置重载时停止）
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self.reader_threads = []
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# 加载初始配置
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self.load_configuration()
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def load_configuration(self):
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"""加载配置并初始化组件"""
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# 停止所有已启动的读取线程
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self.stop_all_reader_threads()
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# 加载配置
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if not self.config_manager.load_config():
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self.logger.error("Failed to load initial configuration")
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return False
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config = self.config_manager.get_config()
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# 重新初始化PLC连接
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if self.plc_manager:
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self.logger.info("Reinitializing PLC connections...")
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self.plc_manager = PLCManager(config["plcs"], self.reader_threads)
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self.plc_manager.connect_all()
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# 重新初始化缓存
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if self.cache_manager:
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self.logger.info("Stopping existing cache manager...")
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self.cache_manager.stop()
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self.logger.info("Initializing cache manager...")
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self.cache_manager = CacheManager(config, self.plc_manager, app=self)
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self.cache_manager.start()
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# 重新初始化API服务器
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if self.api_server:
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self.logger.info("API server already running")
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else:
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self.logger.info("Starting API server...")
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self.api_server = APIServer(self.cache_manager, self.config_path)
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self.api_server.start()
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# 动态启动多区域读取线程
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self.start_all_reader_threads(config)
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self.logger.info("Configuration loaded successfully")
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return True
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def start_all_reader_threads(self, config):
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"""
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遍历PLC的areas,为每个read/read_write区域启动读取线程
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"""
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for plc_name, plc_client in self.plc_manager.plcs.items():
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plc_config = next((p for p in config["plcs"] if p["name"] == plc_name), None)
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if not plc_config or "areas" not in plc_config:
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self.logger.warning(f"PLC {plc_name} 无areas配置，跳过启动读取线程")
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continue
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# 遍历当前PLC的每个areas
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for area_config in plc_config["areas"]:
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area_name = area_config["name"]
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area_type = area_config["type"]
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# 仅处理需要读的区域
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if area_type not in ["read", "read_write"]:
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self.logger.debug(f"PLC {plc_name} 区域{area_name}（{area_type}）无需启动读取线程")
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continue
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try:
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# 创建并启动线程
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read_thread = PLCDataReaderThread(
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plc_client=plc_client,
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plc_name=plc_config["name"],
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area_config=area_config,
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update_interval=0.03,
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max_array_size=10000
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)
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read_thread.start()
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# 存入线程列表，便于后续停止
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self.reader_threads.append((area_name, read_thread))
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self.logger.info(f"✅ 启动区域读取线程：PLC {plc_name} → {area_name}（DB{area_config['db_number']}）")
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except Exception as e:
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self.logger.error(f"❌ 启动区域{area_name}线程失败: {str(e)}", exc_info=True)
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def stop_all_reader_threads(self):
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"""停止所有已启动的读取线程"""
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if not self.reader_threads:
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return
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self.logger.info("Stopping all reader threads...")
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for area_name, thread in self.reader_threads:
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if thread.is_alive():
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thread.stop()
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self.logger.debug(f"Stopped reader thread for area {area_name}")
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self.reader_threads.clear()
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def check_for_reload(self):
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"""检查是否需要重载配置"""
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while True:
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with self.reload_lock:
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if self.reload_flag:
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self.reload_flag = False
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self.load_configuration()
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time.sleep(1)
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def request_reload(self):
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"""请求重载配置"""
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with self.reload_lock:
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self.reload_flag = True
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self.logger.info("Configuration reload requested")
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def run(self):
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"""运行主程序"""
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logging.basicConfig(
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level=logging.INFO,
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format='%(asctime)s - %(threadName)s - %(name)s - %(levelname)s - %(message)s'
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)
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self.logger.info("Starting PLC Gateway...")
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# 启动配置重载检查线程
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reload_thread = threading.Thread(
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target=self.check_for_reload,
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name="ConfigReloadThread",
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daemon=True
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)
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reload_thread.start()
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try:
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# 保持主程序运行
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while True:
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time.sleep(1)
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except KeyboardInterrupt:
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self.logger.info("Shutting down gracefully...")
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finally:
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if self.cache_manager:
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self.cache_manager.stop()
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self.logger.info("Shutdown complete")
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def main():
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app = GatewayApp()
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app.run()
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if __name__ == "__main__":
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main() |