for processing events: GUIs ☑ Client-Server applications Performing extensive processing on the event thread prevents other events from being handled. ## Why do we need to move work off the current thread thread? We don’t just need to move the work, we need to prevent blocking on our event-handling threads. void event_handler() { auto handle = spawn_background_task(); handle.wait(); // no benefit new thread for each event handler ## How do we move work off the current thread? Possible ways to move the work off the current thread: ☑ Spawn a new thread for each event handler ☑ Pass data to a dedicated

35 1.5.2 Middleware 36 1.5.3 HandlerStack 38 1.5.4 Creating a Handler 39 1.6 Testing Guzzle Clients 40 1.6.1 Mock Handler 40 1.6.2 History Middleware 40 1.6.3 Test Web Server 41 1.7 FAQ transport agnostic code; i.e., no hard dependency on cURL, PHP streams, sockets, or non-blocking event loops. • Middleware system allows you to augment and compose client behavior. $client = new GuzzleHttp\Client(); Requirements 1. PHP 5.5.0 2. To use the PHP stream handler, allow_url_fopen must be enabled in your system's php.ini. 3. To use the cURL handler, you must have a recent version of cURL $ \geq $

1.1 Overview 3 1.2 Quickstart 5 1.3 Clients 12 1.4 Request and Response Messages 32 1.5 Event System 39 1.6 Streams 46 1.7 RingPHP Handlers 50 1.8 Testing Guzzle Clients 50 1.9 FAQ 54 synchronous and asynchronous requests using the same interface without requiring a dependency on a specific event loop. • Pluggable HTTP handlers allows Guzzle to integrate with any method you choose for sending sending HTTP requests over the wire (e.g., cURL, sockets, PHP's stream wrapper, non-blocking event loops like React, etc.). • Guzzle makes it so that you no longer need to fool around with cURL options

- 在独立服务器上部署 - 在 SAE 上部署 - Handler - 类型过滤 - robot.key_click —— 回应自定义菜单 - robot.filter —— 回应有指定文本的消息 - Session - 开启/关闭 Session - 修改 Handler 以使用 Session - WeRoBot.Client —— LinkMessage - LocationMessage - VoiceMessage - VideoMessage - UnknownMessage ## • Event Event - Event 公共属性 - SubscribeEvent - UnSubscribeEvent - ScanEvent - ScanCodePushEvent - ScanCodeWaitMsgEvent World，会给收到的每一条信息回复 Hello World import werobot robot = werobot.WeRoBot(token='tokenhere') @robot.handler def hello(message): return 'Hello World!' # 让服务器监听在 0.0.0.0:80 robot.config['HOST']

execution calling the initiating function, and before the initiating function returns), the completion handler shall be submitted for execution (in a manner that shall not block forward progress of the caller

Conceptually, an event can be seen as a sentence, the event's type being the verb, the source the subject and the target the object. Event structure: { "eventType": event="">, "scope": event="">, "source": , "target": , "properties": } Source and target can be any Unomi applications using the JSON format and a typical page view event from a web site could look something like the following: Example page view event: { "eventType":

asyncio [https://docs.python.org/3.6/library/asyncio.html#module-asyncio] module and shares the same event loop (by default since Tornado 5.0). In general, libraries designed for use with asyncio [https://docs http1connection – HTTP/1.x client/server implementation • Asynchronous networking tornado.io loop — Main event loop tornado.iostream — Convenient wrappers for non-blocking sockets ☐ tornado.netutil — Miscellaneous be very expensive. To minimize the cost of concurrent connections, Tornado uses a single-threaded event loop. This means that all application code should aim to be asynchronous and non-blocking because

channel #poland on gophers.slack.com. https://invite.slack.golangbridge.org ## Agenda 1. You need Event Mesh, no Service Mesh – Chris Suszyński (Redhat) 2. Your announcements || Engineer lost & found

20d6/p4_1.jpg) ## Notions of time ## • Processing time • the time of the local clock where an event is being processed • a processing-time window wouldn’t account for game activity while the train results depend on the processing speed and aren’t deterministic ## • Event time • the time when an event actually happened • an event-time window would give you the extra life • results are deterministic deterministic and independent of the processing speed This is called event time |Episode|Episode|Episode|Episode|Episode|Episode|Episode|Episode| |---|---|---|---|---|---|---|---| |IV: A New Hope|V: The Empire

bpf_attach_ breakpoint(uint64_t symbol_addr, int pid, int progfd, int bp_type) { struct perf_event_attr attr = {}; memset(&attr, 0, sizeof(attr)); attr.size = sizeof(attr); attr.type bpf_prog_type prog_type = BPF_PROG_TYPE_PERF_EVENT; int efd = syscall(__NR_perf_event_open, attr, pid, cpu, -1, PERF_FLAG_FD_CLOEXEC); if (efd < 0) { printf("event fd %d err %s\n", efd, strerror(errno));