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getting started with ReactPHP pushing real-time data to the browser @another_clue

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@another_clue Agenda - Hello! - Introduction to async PHP with ReactPHP 2

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@another_clue Agenda - Hello! - Introduction to async PHP with ReactPHP - event loops 3

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@another_clue Agenda - Hello! - Introduction to async PHP with ReactPHP - event loops - streaming data 4

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@another_clue Agenda - Hello! - Introduction to async PHP with ReactPHP - event loops - streaming data - sockets 5

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@another_clue Agenda - Hello! - Introduction to async PHP with ReactPHP - event loops - streaming data - sockets - promises 6

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@another_clue Agenda - Hello! - Introduction to async PHP with ReactPHP - event loops - streaming data - sockets - promises - real time data 7

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@another_clue Agenda - Hello! - Introduction to async PHP with ReactPHP - event loops - streaming data - sockets - promises - real time data - Streaming HTTP 8

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@another_clue Agenda - Hello! - Introduction to async PHP with ReactPHP - event loops - streaming data - sockets - promises - real time data - Streaming HTTP - Chat bots 9

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@another_clue Agenda - Hello! - Introduction to async PHP with ReactPHP - event loops - streaming data - sockets - promises - real time data - Streaming HTTP - Chat bots - interactive CLI tools 10

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@another_clue Agenda - Hello! - Introduction to async PHP with ReactPHP - event loops - streaming data - sockets - promises - real time data - Streaming HTTP - Chat bots - interactive CLI tools - desktop GUI 11

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@another_clue Agenda 12 - Hello! - Introduction to async PHP with ReactPHP - event loops - streaming data - sockets - promises - real time data - Streaming HTTP - Chat bots - interactive CLI tools - desktop GUI - Conclusions

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@another_clue really? 13

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@another_clue this is a getting started guide 14

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@another_clue pushing real-time data to the browser 15

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@another_clue I encourage feedback, questions + suggestions 16

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@another_clue Agenda - Hello! - Introduction to async PHP with ReactPHP - event loops - streaming data - sockets - promises - conclusions 17

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@another_clue Agenda - Hello! - Introduction to async PHP with ReactPHP - event loops - streaming data - sockets - promises - conclusions 18 examples and demo time!

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@another_clue Hello! 19

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@another_clue $ whoami 20

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@another_clue $ whoami Christian Lück 21

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@another_clue $ whoami Christian Lück 22

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@another_clue $ whoami Christian Lueck 23

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@another_clue $ whoami Christian Lueck 24

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@another_clue $ whoami Christian Lueck @clue 25

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@another_clue $ whoami Christian Lueck @another_clue 26

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@another_clue $ whoami Christian Lueck @another_clue passionate about pushing the limits 27

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@another_clue $ whoami Christian Lueck @another_clue passionate about pushing the limits freelance software engineer 28

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@another_clue Who are you? 29 now that you know me…

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@another_clue Who are you? 30 now that you know me… - PHP developers? - architecs / engineers?

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@another_clue Who are you? 31 now that you know me… - PHP developers? - architecs / engineers? - know React?

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@another_clue PHP, the web of the ‘90s? 32

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@another_clue PHP and the web of the ‘90s 33

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@another_clue PHP and the web of the ‘90s 34 Apache Client PHP MySQL

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@another_clue PHP and the web of the ‘90s traditional LAMP stack 35 Apache Client PHP MySQL

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@another_clue PHP and the web of the ‘90s traditional LAMP stack Request-Response-Cycle 36 Apache Client PHP MySQL

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@another_clue PHP and the web of the ‘90s traditional LAMP stack Request-Response-Cycle PHP is too slow? 37 Apache Client PHP MySQL

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@another_clue PHP and the web of the ‘90s traditional LAMP stack Request-Response-Cycle PHP is too slow? 38 Apache Client MySQL FPM PHP PHP

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@another_clue PHP and the web of the ‘90s traditional LAMP stack Request-Response-Cycle PHP is too slow? 39 nginx Client MySQL FPM PHP PHP

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@another_clue PHP and the web of the ‘90s traditional LAMP stack Request-Response-Cycle PHP is too slow? 40 nginx Client FPM PHP PHP memcache MySQL

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@another_clue PHP may not be pretty… 41

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@another_clue PHP may not be pretty… but it gets the job done! 42

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@another_clue Knock knock! Who’s there? 43

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@another_clue Knock knock! 2020! Who’s there? 44

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@another_clue Knock knock! 2020! - Separation of concerns (Frontend↔Backend) - HTTP APIs (RESTful) - Integration with 3rd parties - Live-Data (ticker) - CLI tools Who’s there? 45

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@another_clue Knock knock! 2020! - Separation of concerns (Frontend↔Backend) - HTTP APIs (RESTful) - Integration with 3rd parties - Live-Data (ticker) - CLI tools Who’s there? 46

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@another_clue Node.js 47

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@another_clue Node.js 48 good fit, huge ecosystem

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@another_clue Node.js 49 good fit, huge ecosystem interesting concepts

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@another_clue Node.js 50 good fit, huge ecosystem interesting concepts npm install…

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@another_clue nodejs? 51

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@another_clue no js! 52

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@another_clue Everybody’s favorite language… 53

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@another_clue PHP 54

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@another_clue PHP 55 gets the job done

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@another_clue PHP 56 gets the job done widespread usage

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@another_clue PHP 57 gets the job done widespread usage if PHP can do it…

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@another_clue Enter React! 58

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@another_clue 59

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@another_clue The other React™ 60

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@another_clue The REAL React™ 61

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@another_clue 62

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@another_clue What is React? 63

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@another_clue What is React? non-blocking I/O 64

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@another_clue What is React? non-blocking I/O event-driven 65

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@another_clue What is React? non-blocking I/O event-driven async 66

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@another_clue 100% 67

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@another_clue 100% pure PHP 68

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@another_clue 100% pure PHP no extensions 69

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@another_clue 100% pure PHP no extensions no magic 70

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@another_clue What does that even mean?! 71

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@another_clue the idea 72

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@another_clue calculations are fast 73 the idea

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@another_clue calculations are fast I/O is slow 74 the idea

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@another_clue 75 Source: Latency Numbers Every Programmer Should Know: https://gist.github.com/jboner/2841832 CPU vs I/O

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@another_clue I/O is everywhere 76

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@another_clue I/O is everywhere third party HTTP APIs (RESTful, SOAP, you name it…) 77

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@another_clue I/O is everywhere third party HTTP APIs (RESTful, SOAP, you name it…) mysql, postgres 78

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@another_clue I/O is everywhere third party HTTP APIs (RESTful, SOAP, you name it…) mysql, postgres filesystem I/O (session files) 79

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@another_clue I/O is everywhere third party HTTP APIs (RESTful, SOAP, you name it…) mysql, postgres filesystem I/O (session files) redis, memcache 80

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@another_clue I/O is slow! 81

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@another_clue I/O is slow! So why wait? 82

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@another_clue This is React 83

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@another_clue This is React 84 Start multiple I/O operations (non-blocking)

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@another_clue This is React 85 Start multiple I/O operations (non-blocking) Get notified when something happens (react)

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@another_clue This is React 86 Start multiple I/O operations (non-blocking) Get notified when something happens (react) Don’t waste time waiting

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@another_clue What React is not 87

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@another_clue What React is not React is not black magic / vodoo 88

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@another_clue What React is not React is not black magic / vodoo React is not a framework 89

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@another_clue What React is not React is not black magic / vodoo React is not a framework React is not the new buzz 90

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@another_clue React core components 91

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@another_clue event loop 92

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@another_clue Event loop Consumers - THE core, low-level component 93

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@another_clue Event loop Consumers - THE core, low-level component - Create an instance - Just use the Factory - Additional extensions for bigger payloads - something inbetween… - just pass the $loop around - Start running - keeps running forever - unless stopped or done 94

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@another_clue Event loop Consumers - THE core, low-level component - Create an instance - Just use the Factory - Additional extensions for bigger payloads - something inbetween… - just pass the $loop around - Start running - keeps running forever - unless stopped or done 95

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@another_clue Event loop Implementors - Reactor pattern (hence the name) 96

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@another_clue Event loop Implementors - Reactor pattern (hence the name) - start timers - once - periodic - ticks 97

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@another_clue Event loop Implementors - Reactor pattern (hence the name) - start timers - once - periodic - ticks 98

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@another_clue Event loop Implementors - Reactor pattern (hence the name) - start timers - once - periodic - ticks 99

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@another_clue Event loop Implementors - Reactor pattern (hence the name) - start timers - once - periodic - ticks - plus wait for stream resources to become - readable - writable 100

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@another_clue streaming data 101

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@another_clue Streams - Process large strings in chunks as they happen (think downloads) - Types - Readable (e.g. STDIN pipe) - Writable (e.g. STDOUT pipe) - Duplex (e.g. TCP/IP connection) 102

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@another_clue Stream interfaces and events 103

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@another_clue Stream interfaces and events 104

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@another_clue Stream interfaces and events 105

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@another_clue sockets 106

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@another_clue Sockets 107 - Streams, but over the network

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@another_clue Sockets 108 - Streams, but over the network - servers listen - clients connect

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@another_clue Sockets 109 - Streams, but over the network - servers listen - clients connect - Focus on TCP/IP (UDP etc. also possible)

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@another_clue Sockets 110 - Streams, but over the network - servers listen - clients connect - Focus on TCP/IP (UDP etc. also possible)

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@another_clue Sockets 111 - Streams, but over the network - servers listen - clients connect - Focus on TCP/IP (UDP etc. also possible)

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@another_clue Sockets 112 - Streams, but over the network - servers listen - clients connect - Focus on TCP/IP (UDP etc. also possible)

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@another_clue Sockets in practice 113

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@another_clue Sockets in practice - implementation detail 114

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@another_clue Sockets in practice - implementation detail - higher level protocols (HTTP anybody) 115

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@another_clue Sockets in practice - implementation detail - higher level protocols (HTTP anybody) - higher level concepts (RESTful etc.) 116

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@another_clue Sockets in practice - implementation detail - higher level protocols (HTTP anybody) - higher level concepts (RESTful etc.) - higher level APIs (SDKs, API clients etc.) 117

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@another_clue Sockets in practice - implementation detail - higher level protocols (HTTP anybody) - higher level concepts (RESTful etc.) - higher level APIs (SDKs, API clients etc.) - Concepts still apply, details are hidden 118

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@another_clue promises 119

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@another_clue Promises - Placeholder for a single future result - Possible states: - pending - fulfilled (successfully resolved) - rejected (Exception occured) 120

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@another_clue Promise API 121

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@another_clue Promise API 122

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@another_clue Promise API usage 123

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@another_clue Promise API usage 124

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@another_clue Promise API usage 125

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@another_clue Promises in practice - 126

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@another_clue Promises in practice - Everywhere! 127

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@another_clue Promises in practice - Everywhere! - react/socket - clue/buzz-react - clue/packagist-react - clue/redis-react - react/mysql - … 128

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@another_clue HTTP streaming 129

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@another_clue HTTP in a gist 130

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@another_clue HTTP in a gist 131 GET / HTTP/1.1

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@another_clue HTTP in a gist 132 GET / HTTP/1.1 HTTP/1.1 200 OK Content-Type: text/plain hello world!

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@another_clue HTTP in a gist 133 GET / HTTP/1.1 HTTP/1.1 200 OK Content-Type: text/plain hello world!

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@another_clue HTTP streaming 134

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@another_clue HTTP streaming 135 - HTTP request/response semantics

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@another_clue HTTP streaming 136 - HTTP request/response semantics - streaming responses (download huge files) - streaming requests (upload huge files)

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@another_clue HTTP streaming 137 - HTTP request/response semantics - streaming responses (download huge files) - streaming requests (upload huge files) - Still request/response semantics

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@another_clue HTTP streaming 138 - HTTP request/response semantics - streaming responses (download huge files) - streaming requests (upload huge files) - Still request/response semantics - Long-polling (Comet) anyone?

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@another_clue HTTP streaming 139 - HTTP request/response semantics - streaming responses (download huge files) - streaming requests (upload huge files) - Still request/response semantics - Long-polling (Comet) anyone?

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@another_clue EventSource 140

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@another_clue Server-Sent Events (SSE) / EventSource 141

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@another_clue Server-Sent Events in a gist 142 - Normal Request/Response - Client API for streaming access

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@another_clue Server-Sent Events in a gist 143 - Normal Request/Response - Client API for streaming access HTTP/1.1 200 OK Content-Type: text/event-stream

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@another_clue Server-Sent Events in a gist 144 - Normal Request/Response - Client API for streaming access HTTP/1.1 200 OK Content-Type: text/event-stream data: hello

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@another_clue Server-Sent Events in a gist 145 - Normal Request/Response - Client API for streaming access HTTP/1.1 200 OK Content-Type: text/event-stream data: hello data: world

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@another_clue Server-Sent Events in a gist 146 - Normal Request/Response - Client API for streaming access HTTP/1.1 200 OK Content-Type: text/event-stream data: hello data: world

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@another_clue fully-functional streaming HTTP server in a single PHP file 147

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@another_clue PubSub 148

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@another_clue PubSub 149 - Publish/Subscribe

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@another_clue PubSub 150 - Publish/Subscribe - common pattern for distributed system

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@another_clue PubSub 151 - Publish/Subscribe - common pattern for distributed system - message broker in between

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@another_clue PubSub 152 - Publish/Subscribe - common pattern for distributed system - message broker in between Publisher Redis Subscriber

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@another_clue PubSub 153 - Publish/Subscribe - common pattern for distributed system - message broker in between - horizontal scalability - independent components Publisher Redis Subscriber

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@another_clue PubSub 154 - Publish/Subscribe - common pattern for distributed system - message broker in between - horizontal scalability - independent components Publisher Redis Subscriber Publisher Subscriber Publisher Subscriber

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@another_clue PubSub 155 - Publish/Subscribe - common pattern for distributed system - message broker in between - horizontal scalability - independent components Publisher Redis Subscriber Publisher Subscriber Publisher Subscriber

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@another_clue PubSub 156 - Publish/Subscribe - common pattern for distributed system - message broker in between - horizontal scalability - independent components Publisher Redis Subscriber Publisher Subscriber Publisher Subscriber

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@another_clue PubSub 157 - Publish/Subscribe - common pattern for distributed system - message broker in between - horizontal scalability - independent components Publisher Redis Subscriber Publisher Subscriber Publisher Subscriber

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@another_clue fully-functional, distributed HTTP streaming server in a single PHP file 158

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@another_clue many, MANY more third-party projects: https://github.com/reactphp/react/wiki/Users 159

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@another_clue Conclusions 160

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@another_clue 161 Can I use ReactPHP to make my website 1000x faster?

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@another_clue YES 162 Can I use ReactPHP to make my website 1000x faster?

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@another_clue YES 163 But you might be missing the point… Can I use ReactPHP to make my website 1000x faster?

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@another_clue PHP 164

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@another_clue PHP faster than you probably thought 165

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@another_clue PHP faster than you probably thought more versatile than you probably thought 166

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@another_clue ReactPHP 167

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@another_clue ReactPHP 168 a real deal and here to stay

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@another_clue ReactPHP 169 a real deal and here to stay stable & production ready

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@another_clue ReactPHP 170 a real deal and here to stay stable & production ready *awesome*

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@another_clue try! 171

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@another_clue try! whenever having to wait 172

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@another_clue try! whenever having to wait whenever accessing network 173

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@another_clue help! 174

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@another_clue help! elaborate documentation on ReactPHP.org 175

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@another_clue help! elaborate documentation on ReactPHP.org tweet @ReactPHP or #reactphp 176

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@another_clue help! elaborate documentation on ReactPHP.org tweet @ReactPHP or #reactphp Talk to me 177

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@another_clue help! elaborate documentation on ReactPHP.org tweet @ReactPHP or #reactphp Talk to me Did I mention I’m available? 178

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@another_clue // thank you! $loop->stop(); 179 @another_clue – https://clue.engineering/

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@another_clue integration 180

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@another_clue integration non-blocking and blocking don’t mix well 181

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@another_clue integration non-blocking and blocking don’t mix well decide for either approach 182

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@another_clue integration non-blocking and blocking don’t mix well decide for either approach isolate & communicate 183

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@another_clue Integration with traditional environments 184 integrating async into sync is easy

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@another_clue Integration with traditional environments 185 integrating async into sync is easy - just run the loop until you’re done - see clue/block-react

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@another_clue Integration with traditional environments 186 integrating async into sync is easy - just run the loop until you’re done - see clue/block-react integrating sync into async is hard

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@another_clue Integration with traditional environments 187 integrating async into sync is easy - just run the loop until you’re done - see clue/block-react integrating sync into async is hard - often requires async rewrite - consider forking instead

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@another_clue Avoid blocking! - The loop must not be blocked 188

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@another_clue Avoid blocking! - The loop must not be blocked - Many functions / lib assume blocking by default - Anything >1ms should be reconsidered 189

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@another_clue Avoid blocking! - The loop must not be blocked - Many functions / lib assume blocking by default - Anything >1ms should be reconsidered - Alternatives - Single result: Promises - Evented: Streams 190

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@another_clue Avoid blocking! - The loop must not be blocked - Many functions / lib assume blocking by default - Anything >1ms should be reconsidered - Alternatives - Single result: Promises - Evented: Streams - Need a blocking function? - Fork off! - Use IPC 191

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@another_clue Avoid blocking! - The loop must not be blocked - Many functions / lib assume blocking by default - Anything >1ms should be reconsidered - Alternatives - Single result: Promises - Evented: Streams - Need a blocking function? - Fork off! - Use IPC 192 Pay attention: - PDO, mysql etc. - file system access - network access - third-party APIs