mysql实现分布式事务管理系统

import pymysql
import time

# 模拟协调者
def coordinator():
    conn1 = pymysql.connect(host='node1', user='user', password='password', db='db')
    conn2 = pymysql.connect(host='node2', user='user', password='password', db='db')

    try:
        # 第一阶段：准备
        with conn1.cursor() as cursor1, conn2.cursor() as cursor2:
            cursor1.execute("PREPARE TRANSACTION 'tx1'")
            cursor2.execute("PREPARE TRANSACTION 'tx2'")

        # 等待所有节点准备就绪
        time.sleep(1)

        # 第二阶段：提交
        with conn1.cursor() as cursor1, conn2.cursor() as cursor2:
            cursor1.execute("COMMIT PREPARED 'tx1'")
            cursor2.execute("COMMIT PREPARED 'tx2'")

    except Exception as e:
        # 回滚
        with conn1.cursor() as cursor1, conn2.cursor() as cursor2:
            cursor1.execute("ROLLBACK PREPARED 'tx1'")
            cursor2.execute("ROLLBACK PREPARED 'tx2'")

    finally:
        conn1.close()
        conn2.close()

# 模拟参与者
def participant(node):
    conn = pymysql.connect(host=node, user='user', password='password', db='db')
    try:
        with conn.cursor() as cursor:
            cursor.execute("UPDATE table SET column = value WHERE condition")
        conn.commit()
    except Exception as e:
        conn.rollback()
    finally:
        conn.close()

# 启动协调者和参与者
coordinator()
participant('node1')
participant('node2')