标签：1.0 AMQP messages credit command PR2 nodes message
Message
bare message：发送端发送的消息。
annotated message：接收端接收的消息。
A Node is a named source and/or sink of Messages
Links may be “destructive”, or “non-destructive”.
Links may have entry criteria (Filters)。
Duplicate deliveries should be discarded.
If the node at either end of the link is deleted, so is the link itself.
Credit
A link with no credit is impassable.
Sending a message irrevocably consumes the credit.
Receivers of messages can add or remove multiple units of credit at any time.
Credit is used to ensure that nodes do not receive more messages than they can physically store.
Containers
Nodes within the AMQP network exist within Containers.
A container is a physical or logical process to which network connections can be established.
Sessions
A Session is a named interaction between two containers providing for a pair of reliable ordered command streams (one in each direction).
Containers and Sessions form an underlay network, nodes and links an overlay network atop them.
Commands
Sessions are a transport for commands.
Commands are the atomic units of work of the AMQP transport protocol.
Commands are used to create links between nodes in the source and destination containers, to transfer message data, and to issue and revoke credit.
Should a command fail for some reason, then the sender of the command will be notified as to the last successfully executed command.
No command after the failed command will be executed.
Transactions
The AMQP specification defines a transactional container as one that is capable of performing addition/removal of multiple messages to/from nodes in a single atomic action.
In any given session, at most one peer may act as the transactional container. The other peer is the transaction controller.
The transaction mode is controlled at the session level, set at the time of session creation, and cannot thereafter be modified.
Container, controller. coordinator
Only the addition/removal of messages to/from nodes are affected by transactions, other state changes such as the creation or deletion of links, and the issuance of credit, are not.
转载于:https://www.cnblogs.com/shuaifeng/archive/2010/04/09/1707929.html
标签：1.0,AMQP,messages,credit,command,PR2,nodes,message 来源： https://blog.csdn.net/weixin_33897722/article/details/94474052
本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享； 2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关； 3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关； 4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除； 5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。