microbenchmarks and a real-world application • Conclusion 26Synchronous/Asynchronous Mechanisms Boil the water Synchronous Asynchronous Wait Polling Callback Check Do your things Multitasking! 27Taro’s motivation behind Taro • We have presented the Taro C++ programming model - Synchronous and Asynchronous mechanisms • We have presented the Taro coroutine-aware scheduling algorithm • We have presented

clients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 6.4 Asynchronous networking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 257 Index 259 iiiTornado Documentation, Release 6.5.1 Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed. By using non-blocking network I/O, Tornado wait() if __name__ == "__main__": asyncio.run(main()) This example does not use any of Tornado’s asynchronous features; for that see this simple chat room. 5Tornado Documentation, Release 6.5.1 6 Chapter

Tornado [https://www.tornadoweb.org] is a Python web framework and asynchronous networking library, originally developed at FriendFeed [https://en.wikipedia.org/wiki/FriendFeed]. By using non-blocking __name__ == "__main__": asyncio.run(main()) This example does not use any of Tornado’s asynchronous features; for that see this simple chat room [https://github.com/tornadoweb/tornado/tree/stable/demos/chat] typically run with only one thread per process. See the User’s guide for more on Tornado’s approach to asynchronous programming. While some support of WSGI is available in the tornado.wsgi module, it is not a

and files, and abstracts away the underlying HTTP transport layer. Can send both synchronous and asynchronous requests using the same interface without requiring a dependency on a specific event loop. Pluggable $res->getBody(); // {"type":"User"...' var_export($res->json()); // Outputs the JSON decoded data // Send an asynchronous request. $req = $client->createRequest('GET', 'http://httpbin.org', ['future' => true]); $cl Adapter Test Web Server FAQ Why should I use Guzzle? Does Guzzle require cURL? Can Guzzle send asynchronous requests? How can I add custom cURL options? How can I add custom stream context options? Why

Message BImagine this issue on your system. How would you solve it? 89SOLVE ⊡ Changed from asynchronous work to synchronous work. ⊡ Split large messages into smaller ones. ⊡ Rewrote the message Message BSOLVE ⊡ Asynchronous to synchronous 92 5MB+5MB 5MB93 So, I am not crashing anymore. Can I stop here?SOLVE 94 7500 meters and not just 5000 No!SOLVE ⊡ Asynchronous to synchronous number of water meters the unit listened to. 97 5000 1000 5MB 1MBSOLVE ⊡ Changed from asynchronous work to synchronous work. ⊡ Split large messages into smaller ones. ⊡ Rewrote the message

files, and abstracts away the underlying HTTP transport layer. • Can send both synchronous and asynchronous requests using the same interface without requiring a dependency on a specific event loop. • $res->getBody(); // {"type":"User"...' var_export($res->json()); // Outputs the JSON decoded data // Send an asynchronous request. $req = $client->createRequest('GET', 'http://httpbin.org', ['future' => true]); $cli GuzzleHttp\Message\ResponseInterface using the getResponse() method of the exception. Asynchronous Requests You can send asynchronous requests by setting the future request option to true (or a string that your

Known Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219 15 Change log 222 15.1 Version 4.2.32 (2015-07-09) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222 users who just want to see what’s new in this release, there is a detailed list in chapter 15, Change log, page 222. 11 1 First steps 1.1 Why is virtualization useful? The techniques and features that VirtualBox will be shown a warning and the package will be left unconfigured. Please have a look at /var/log/vbox-install.log to find out why the compilation failed. You may have to install the appropriate Linux kernel

Known Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232 15 Change log 235 15.1 Version 4.3.36 (201x-xx-xx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235 users who just want to see what’s new in this release, there is a detailed list in chapter 15, Change log, page 235. 11 1 First steps 1.1 Why is virtualization useful? The techniques and features that VirtualBox will be shown a warning and the package will be left unconfigured. Please have a look at /var/log/vbox-install.log to find out why the compilation failed. You may have to install the appropriate Linux kernel

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � trait � � � � � Logger � � � � � log � � � � � � � � � � . � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � impl trait Logger } / / / Log a message at the given verbosity level . fn log(&self, verbosity: u8, message: impl Display ( ; { struct StderrLogger ; impl Logger for StderrLogger } fn log(&self, verbosity: = } verbosity}: {message { " ( ; { { fn do_things(logger: &impl Logger ( } logger.log(5, "FYI " ( ; logger.log(2 , " � � � � " ( ; { / / TODO: Define and implement `VerbosityFilter ` . fn main )

with a log method. Code which might log its progress can then take an &impl Logger. In testing, this might put messages in the test logfile, while in a production build it would send messages to a log server pub trait Logger { /// Log a message at the given verbosity level. fn log(&self, verbosity: u8, message: &str); } struct StdoutLogger; impl Logger for StdoutLogger { fn log(&self, verbosity: u8, message: 3, inner: StdoutLogger }; logger.log(5, "FYI"); logger.log(2, "Uhoh"); } 13.4.1 Solution pub trait Logger { /// Log a message at the given verbosity level. fn log(&self, verbosity: u8, message: &str);