# Message Handling # with Boolean Algebra  Ben Deane / CppCon / 2024-09-16 ## Alternative Title "The Unreasonable Unreasonable Effectiveness of Boolean Algebra in Software Design, Showing the Particular Application of a Message Handling Library, with an Excursion into the Roots of Programming" ## Frontmatter No AI/LLM was this talk is about The workings of a message-handling library. • How messages and the fields in them are specified. • Efficiently identifying (with matchers) a message coming off the wire. • The role of

World import werobot robot = werobot.WeRoBot(token='tokenhere') @robot.handler def echo(message): return 'Hello World!' robot.run() © Copyright 2014, whtsky. Created using Sphinx kenhere') # 通过修饰符添加handler @robot.handler def echo(message): return 'Hello World!' # 通过 `add_handler` 添加 handler def echo(message): return 'Hello World!' robot.add_handler(echo) subscribe(message): return 'Hello My Friend!' robot.run() 或者，你的 handler 只能处理文本？ import werobot robot = werobot.WeRoBot(token='tokenhere') Note @robot.text def echo(message): return

World import werobot robot = werobot.WeRoBot(token='tokenhere') @robot.handler def echo(message): return 'Hello World!' robot.run() ## Handlers WeRoBot会将合法的请求发送给handlers依次执行。 如 通过修饰符添加handler @robot.handler def echo(message): return 'Hello World!' # 通过 `add_handler` 添加 handler def echo(message): ## Messages 目前WeRoBot共有四种Message：TextMessage，ImageMessage，LocationMessage 一共有4类 Message ，5种 type 。显然，一个 handler 不可能把这五种 type 都支持全。 幸运的是，WeRoBot 可以帮你过滤收到的消息。 只想处理被新用户关注的消息？ import werobot robot = werobot.WeRoBot(token='tokenhere') @robot.hello def hello(message):

26 Message Redelivery and Undelivered Messages 1.27 Message Expiry 1.28 Large Messages 1.29 Paging 1.30 Queue Attributes 1.31 Scheduled Messages 1.32 Last-Value Queues 1.33 Message Grouping Client Reconnection and Session Reattachment 1.41 Diverting and Splitting Message Flows 1.42 Core Bridges 1.43 Duplicate Message Detection 1.44 Clusters 1.45 High Availability and Failover 1.46 performance, clustered, asynchronous messaging system. - Apache ActiveMQ Artemis is an example of Message Oriented Middleware (MoM). For a description of MoMs and other messaging concepts please see the

11.1 Celery Deprecation Timeline ..... 241 11.2 Internals: The worker ..... 241 11.3 Task Message Protocol ..... 243 11.4 “The Big Instance” Refactor ..... 244 11.5 Internal Module Reference . distributed – Celery is an open source asynchronous task queue/job queue based on distributed message passing. It is focused on real-time operation, but supports scheduling as well. The execution units implemented in any language. It can also operate with other languages using webhooks. The recommended message broker is RabbitMQ, but limited support for Redis, Beanstalk, MongoDB, CouchDB and databases (using

5.2. Configuring Acceptors ..... 13 6. AMQP ..... 15 6.1. Examples ..... 15 6.2. Message Conversions ..... 15 6.3. Intercepting and changing messages ..... 16 6.4. AMQP and security Transactions ..... 17 6.8. AMQP scheduling message delivery ..... 17 6.9. DLQ and Expiry transfer ..... 17 6.10. Filtering on Message Annotations ..... 18 6.11. Configuring AMQP Syntax ..... 134 24. Routing Messages With Wild Cards ..... 135 25. Diverting and Splitting Message Flows ..... 136 25.1. Exclusive Divert ..... 137 25.2. Non-exclusive Divert ..... 137 25.3

Configuration 1.31 Flow Control 1.32 Guarantees of sends and commits 1.33 Message Redelivery and Undelivered Messages 1.34 Message Expiry 1.35 Large Messages 1.36 Paging 1.37 Scheduled Messages 1.38 Last-Value Queues 1.39 Ring Queues 1.40 Retroactive Addresses 1.41 Exclusive Queues 1.42 Message Grouping 1.43 Consumer Priority 1.44 Extra Acknowledge Modes 1.45 Management 1.46 Management Reconnection and Session Reattachment 1.54 Diverting and Splitting Message Flows 1.55 Core Bridges 1.56 Transformers 1.57 Duplicate Message Detection 1.58 Clusters 1.59 Federation 1.60 Address Federation

24 Message Redelivery and Undelivered Messages 1.25 Message Expiry 1.26 Large Messages 1.27 Paging 1.28 Queue Attributes 1.29 Scheduled Messages 1.30 Last-Value Queues 1.31 Message Grouping Client Reconnection and Session Reattachment 1.38 Diverting and Splitting Message Flows 1.39 Core Bridges 1.40 Duplicate Message Detection 1.41 Clusters 1.42 High Availability and Failover 1.43 Graceful performance, clustered, asynchronous messaging system. - Apache ActiveMQ Artemis is an example of Message Oriented Middleware (MoM). For a description of MoMs and other messaging concepts please see the

Configuration 1.31 Flow Control 1.32 Guarantees of sends and commits 1.33 Message Redelivery and Undelivered Messages 1.34 Message Expiry 1.35 Large Messages 1.36 Paging 1.37 Scheduled Messages 1.38 Last-Value Queues 1.39 Ring Queues 1.40 Retroactive Addresses 1.41 Exclusive Queues 1.42 Message Grouping 1.43 Consumer Priority 1.44 Extra Acknowledge Modes 1.45 Management 1.46 Management Reconnection and Session Reattachment 1.54 Diverting and Splitting Message Flows 1.55 Core Bridges 1.56 Transformers 1.57 Duplicate Message Detection 1.58 Clusters 1.59 Federation 1.60 Address Federation

queue, distributed Celery is an open source asynchronous task queue/job queue based on distributed message passing. It is focused on real-time operation, but supports scheduling as well. The execution units languages using webhooks [http://ask.github.com/celery/userguide/remote-tasks.html]. The recommended message broker is RabbitMQ [http://www.rabbitmq.com/], but limited support [http://kombu.readthedocs.org later, or ignore it.| |Result Stores|Database, MongoDB, Redis, Tokyo Tyrant, Cassandra, or AMQP (message notification).| |Webhooks|Your tasks can also be HTTP callbacks, enabling cross-language communication