红帽全球峰会12.2. thread-safety 规则
连接、会话、发送者、接收器、跟踪器 和交付 对象不是线程安全状态，受以下规则约束：
-
您必须只使用它们来自
messaging_handler回调或work_queue函数。 - 对于另一个连接，不要使用属于来自回调的一个连接的对象。
- 您可以在成员变量中存储 AMQ C++ 对象，以便在后续回调中使用，只要您遵守规则 2。
message 对象是一个值类型，其线程限制与标准 C++ 内置类型相同。它不能同时修改。
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