{"id":69346,"date":"2020-02-18T14:44:04","date_gmt":"2020-02-18T11:44:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/rabbitmq-chast-1-introduction-erlang-amqp"},"modified":"2020-03-03T16:14:59","modified_gmt":"2020-03-03T13:14:59","slug":"rabbitmq-chast-1-introduction-erlang-amqp","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/administrirovanie\/rabbitmq-chast-1-introduction-erlang-amqp","title":{"rendered":"RabbitMQ. Dio 1. Uvod. Erlang, AMQP","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Dobar dan, Habr! \u017delim podijeliti priru\u010dnik s znanjem koji sam uspio prikupiti o <code>RabbitMQ<\/code> i sa\u017eeti u kratke preporuke i zaklju\u010dke. <\/p>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3 id=\"oglavlenie\">Sadr\u017eaj<\/h3>\n<p><\/p>\n<ul>\n<li>RabbitMQ. Dio 1. Uvod. Erlang, AMQP i RPC<\/li>\n<li>RabbitMQ. Dio 2. Razmatramo Exchanges<\/li>\n<li>RabbitMQ. Dio 3. Razumijemo Redove i Povezivanja<\/li>\n<li>RabbitMQ. Dio 4. Razja\u0161njavanje \u0161to su poruke i okviri<\/li>\n<li>RabbitMQ. Dio 5. Performanse objavljivanja i konzumiranja poruka<\/li>\n<li>RabbitMQ. Dio 6. Pregled modula Federation i Shovel<\/li>\n<li>RabbitMQ. Dio 7. Detaljno o vezi i kanalu<\/li>\n<li>RabbitMQ. Dio 8. RabbitMQ u .NET<\/li>\n<li>RabbitMQ. Dio 9. Pra\u0107enje<\/li>\n<\/ul>\n<p><\/p>\n<h3 id=\"kratko-pro-amqp\">Kratko o AMQP<\/h3>\n<p><\/p>\n<blockquote><p>AMQP (Advanced Message Queuing Protocol) \u2014 otvoreni protokol za prenos poruka izme\u0111u komponenti sustava. Osnovna ideja je da pojedina\u010dne pod-sustave (ili neovisne aplikacije) mogu razmjenjivati poruke raznim na\u010dinima preko AMQP posrednika, koji provodi rutiranje, eventualno jam\u010di dostavu, raspodjelu tokova podataka, i pretplatu na potrebne tipove poruka.<\/p><\/blockquote>\n<p>Protokol <code>AMQP<\/code> uvodi tri pojma:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"RabbitMQ. Dio 1. Uvod. Erlang, AMQP\" src=\"\/wp-content\/uploads\/2020\/02\/bb523c277776ca1ae13fcb9eb10788df.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<ul>\n<li><code>exchange<\/code> (to\u010dka razmjene ili exchange) \u2014 u nju se \u0161alju poruke. To\u010dka razmjene <strong>raspodjeljuje poruku<\/strong> u jedan ili vi\u0161e redova. Ona <strong>rutira poruke u red<\/strong> na temelju stvorenih veza (<code>binding<\/code>) izme\u0111u nje i reda<\/li>\n<li><code>queue<\/code> (red) \u2014 struktura podataka na disku ili u RAM-u, koja <strong>pohranjuje reference na poruke i isporu\u010duje kopije poruka <code>consumers<\/code><\/strong> (konzumentima)<\/li>\n<li><code>binding<\/code> (binding) \u2014 pravilo koje <strong>javlja to\u010dki razmjene u koji red ove poruke trebaju i\u0107i<\/strong><\/li>\n<\/ul>\n<p><\/p>\n<p>Protokol radi iznad <noindex><a rel=\"nofollow\" href=\"https:\/\/www.amqp.org\/product\/architecture\">TCP\/IP<\/a><\/noindex>.<\/p>\n<p><\/p>\n<h3 id=\"kratko-pro-erlang\">Kratko o Erlangu<\/h3>\n<p><\/p>\n<p>Izvorni kod projekta nalazi se u repozitoriju na <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/rabbitmq\">GitHub<\/a><\/noindex>. Arhitektura <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/rabbitmq\/rabbitmq-server\">RabbitMQ-server<\/a><\/noindex> temelji se na <noindex><a rel=\"nofollow\" href=\"https:\/\/www.erlang.org\/\">Erlangu<\/a><\/noindex> i BEAM-u.<\/p>\n<p><\/p>\n<blockquote><p><code>Erlangu<\/code> razvijen od strane <code>Ericssona<\/code> sredinom 1980-ih kao distribuirani, otporan sustav u stvarnom vremenu za aplikacije koje zahtijevaju pouzdan rad 99,999%. <code>Erlangu<\/code> koristi se u raznim industrijama i suvremenim aplikacijama, primjerice u <code>WhatsApp<\/code>. O tome se mo\u017ee vi\u0161e pro\u010ditati u \u010dlanku <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/276951\/\">arhitektura WhatsApp, kojeg je Facebook kupio za 19 milijardi dolara<\/a><\/noindex><\/p><\/blockquote>\n<p><\/p>\n<h3 id=\"kratko-pro-rabbitmq\">Kratko o RabbitMQ<\/h3>\n<p><\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.rabbitmq.com\/\">RabbitMQ<\/a><\/noindex> \u2013 to je posrednik za poruke s otvorenim izvorom. Rutinira poruke prema svim osnovnim principima protokola <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/AMQP\">AMQP<\/a><\/noindex> opisanim u <noindex><a rel=\"nofollow\" href=\"http:\/\/www.amqp.org\/resources\/download\">specifikaciji<\/a><\/noindex>. <code>RabbitMQ<\/code> implementira i dopunjava protokol <code>AMQP<\/code>.<\/p>\n<p><\/p>\n<p>Osnovna ideja modela razmjene poruka u <code>RabbitMQ<\/code> je da <code>producer<\/code> (izdava\u010d) ne \u0161alje poruke izravno u red. U stvarnosti, a vrlo \u010desto, izdava\u010d \u010dak ne zna ho\u0107e li poruka uop\u0107e biti isporu\u010dena u neki red. <\/p>\n<p><\/p>\n<p>Umjesto toga, izdava\u010d mo\u017ee slati poruke samo na razmjenu. S jedne strane, razmjena prima poruke od izdava\u010da, a s druge strane ih \u0161alje u redove. Razmjena mora to\u010dno znati \u0161to u\u010diniti s primljenom porukom. Treba li ju dodati u odre\u0111eni red? Treba li ju dodati u vi\u0161e redova? Ili poruku treba ignorirati.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"RabbitMQ. Dio 1. Uvod. Erlang, AMQP\" src=\"\/wp-content\/uploads\/2020\/02\/1deaebddebde216b8f706953ddf2d3c6.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Kratko, rad <code>RabbitMQ<\/code> mo\u017ee se opisati na sljede\u0107i na\u010din:<\/p>\n<p><\/p>\n<ol>\n<li>Izdava\u010d \u0161alje poruku odre\u0111enoj razmjeni<\/li>\n<li>Razmjena, primiv\u0161i poruku, usmjerava je u jedan ili vi\u0161e redova prema pravilima vezivanja izme\u0111u nje i reda<\/li>\n<li>Red \u010duva vezu na ovu poruku. Sama poruka se pohranjuje u radnu memoriju ili na disku.<\/li>\n<li>\u010cim potro\u0161a\u010d bude spreman primiti poruku iz reda, poslu\u017eitelj stvara kopiju poruke prema vezi i \u0161alje je.<\/li>\n<li>Potro\u0161a\u010d prima poruku i \u0161alje brokeru potvrdu.<\/li>\n<li>Broker, primiv\u0161i potvrdu, uklanja kopiju poruke iz reda. Zatim uklanja iz radne memorije i s diska.<\/li>\n<\/ol>\n<p><\/p>\n<h4 id=\"rpc\"><em>RPC<\/em><\/h4>\n<p><\/p>\n<p>Proces <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%A3%D0%B4%D0%B0%D0%BB%D1%91%D0%BD%D0%BD%D1%8B%D0%B9_%D0%B2%D1%8B%D0%B7%D0%BE%D0%B2_%D0%BF%D1%80%D0%BE%D1%86%D0%B5%D0%B4%D1%83%D1%80\">RPC (remote procedure call)<\/a><\/noindex> le\u017ei u osnovi prakti\u010dki svih interakcija s kernelom. <code>RabbitMQ<\/code>. Na primjer, po\u010detne rasprave o uvjetima klijenta s <code>RabbitMQ<\/code>, demonstrira odre\u0111eni proces <code>RPC<\/code>. Kada se ovaj niz zavr\u0161i, <code>RabbitMQ<\/code> bit \u0107e spreman primati zahtjeve od klijenta:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"RabbitMQ. Dio 1. Uvod. Erlang, AMQP\" src=\"\/wp-content\/uploads\/2020\/02\/059f37304f45a1f0ff625b671f6462ee.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Tako\u0111er u specifikaciji <code>AMQP<\/code> i klijent i poslu\u017eitelj mogu pozivati naredbe. To zna\u010di da klijent o\u010dekuje interakciju s poslu\u017eiteljem. Naredbe su klase i metode. Na primjer, <code>Connection.Start<\/code> \u2013 poziv metode <code>Pokrenuti<\/code> klase <code>Connection<\/code>.<\/p>\n<p><\/p>\n<h4 id=\"podklyuchenie-i-kanaly\"><em>Povezivanje i kanali<\/em><\/h4>\n<p><\/p>\n<p>Za takvu razmjenu informacija izme\u0111u klijenta i poslu\u017eitelja koriste se <strong>kanali<\/strong>. Kanali se stvaraju unutar <strong>odre\u0111ene veze<\/strong>. Svaki kanal je izoliran od drugih kanala. U sinkronom slu\u010daju nije mogu\u0107e izvr\u0161iti sljede\u0107u naredbu dok se ne primi odgovor. <\/p>\n<p><\/p>\n<p>Kako biste imali mogu\u0107nost slanja naredbi paralelno, morate otvoriti vi\u0161e kanala. Svaki kanal stvara poseban <code>Erlangu<\/code> proces. Jedna veza mo\u017ee imati mnogo kanala (<noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%9C%D1%83%D0%BB%D1%8C%D1%82%D0%B8%D0%BF%D0%BB%D0%B5%D0%BA%D1%81%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D0%B5\">multiplexing<\/a><\/noindex>). Za svaku vezu postoje odre\u0111ene strukture i objekti u memoriji. Stoga, \u0161to vi\u0161e veza postoji unutar konekcije, to <strong>vi\u0161e memorije koristi RabbitMQ<\/strong> za upravljanje takvom vezom.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"RabbitMQ. Dio 1. Uvod. Erlang, AMQP\" src=\"\/wp-content\/uploads\/2020\/02\/9bc388200f4f82eb8f98cb1dd1580675.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Jednostavan primjer stvaranja veze i kanala pomo\u0107u <noindex><a rel=\"nofollow\" href=\"https:\/\/www.rabbitmq.com\/dotnet.html\">RabbitMQ.Client<\/a><\/noindex>:<\/p>\n<p><\/p>\n<pre><code class=\"cs\">\/\/ ...\nprivate void TryConnect()\n{\n    var factory = new ConnectionFactory() \n    {\n        HostName = &quot;host_name&quot;,\n        UserName = &quot;user_name&quot;,\n        Password = &quot;p@ssword&quot;,\n        \/\/ \u0412\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435 \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u043a\u043e\u0433\u043e \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\n        \/\/ \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f \u043f\u043e\u0441\u043b\u0435 \u0441\u0431\u043e\u0435\u0432 \u0441\u0435\u0442\u0438 \n        AutomaticRecoveryEnabled = true\n    };\n    _connection = factory.CreateConnection();\n}\n\/\/ ...\npublic void CreateChanel()\n{\n    _channel = _connection.CreateModel();\n    \/\/ other options \n}<\/code><\/pre>\n<p><\/p>\n<p>Otvaranje nove veze za svaku operaciju nije preporu\u010dljivo jer to <strong>mo\u017ee uzrokovati velike tro\u0161kove<\/strong>. Kanali bi tako\u0111er trebali biti stalni, ali mnoge gre\u0161ke u protokolu dovode do zatvaranja kanala, pa trajanje kanala mo\u017ee biti kra\u0107e od trajanja veze.<\/p>\n<p><\/p>\n<h4 id=\"gde-ispolzuetsya-rabbitmq\"><em>Gdje se koristi RabbitMQ?<\/em><\/h4>\n<p><\/p>\n<p>U kontekstu mikroservisa, protokol <code>AMQP<\/code> i njegova implementacija u <code>RabbitMQ<\/code> \u010desto se koriste za <strong>asinhronu interakciju<\/strong> me\u0111u servisima.<\/p>\n<p><\/p>\n<p>U kontekstu <code>IIOT<\/code> protokol <code>AMQP<\/code> i njegova implementacija u <code>RabbitMQ<\/code> koristi se za razmjenu podataka izme\u0111u servera (server-server). Tako\u0111er se koristi dodatak <noindex><a rel=\"nofollow\" href=\"https:\/\/www.rabbitmq.com\/mqtt.html\">MQTT Plugin RabbitMQ<\/a><\/noindex> koji je implementacija protokola <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/MQTT\">MQTT<\/a><\/noindex> za prijenos podataka izme\u0111u senzora i servera u niskbrzinskim okru\u017eenjima s visokim ka\u0161njenjem (cijeli popis podr\u017eanih protokola naveden je na <noindex><a rel=\"nofollow\" href=\"https:\/\/www.rabbitmq.com\/protocols.html\">web stranici projekta<\/a><\/noindex>).<\/p>\n<p><\/p>\n<p>U sljede\u0107em \u010dlanku \u0107emo se detaljnije pozabaviti razmjenama.<\/p>\n<p><\/p>\n<h3 id=\"ssylki\">Linkovi<\/h3>\n<p><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/www.rabbitmq.com\/\">Web stranica projekta RabbitMQ<\/a><\/noindex><\/li>\n<\/ul>\n<p>Izvor: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/488654\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0431\u0440\u044b\u0439 \u0434\u0435\u043d\u044c, \u0425\u0430\u0431\u0440! \u0425\u043e\u0447\u0443 \u043f\u043e\u0434\u0435\u043b\u0438\u0442\u044c\u0441\u044f \u0443\u0447\u0435\u0431\u043d\u0438\u043a\u043e\u043c-\u0441\u043f\u0440\u0430\u0432\u043e\u0447\u043d\u0438\u043a\u043e\u043c \u0437\u043d\u0430\u043d\u0438\u0439, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043c\u043d\u0435 \u0443\u0434\u0430\u043b\u043e\u0441\u044c \u0441\u043e\u0431\u0440\u0430\u0442\u044c \u043f\u043e RabbitMQ \u0438 \u0441\u0436\u0430\u0442\u044c \u0432 \u043a\u043e\u0440\u043e\u0442\u043a\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0438 \u0438 \u0432\u044b\u0432\u043e\u0434\u044b. \u041e\u0433\u043b\u0430\u0432\u043b\u0435\u043d\u0438\u0435 RabbitMQ. \u0427\u0430\u0441\u0442\u044c 1. Introduction. Erlang, AMQP \u0438 RPC RabbitMQ. \u0427\u0430\u0441\u0442\u044c 2. \u0420\u0430\u0437\u0431\u0438\u0440\u0430\u0435\u043c\u0441\u044f \u0441 Exchanges RabbitMQ. \u0427\u0430\u0441\u0442\u044c 3. \u0420\u0430\u0437\u0431\u0438\u0440\u0430\u0435\u043c\u0441\u044f \u0441 Queues \u0438 Bindings RabbitMQ. \u0427\u0430\u0441\u0442\u044c 4. \u0420\u0430\u0437\u0431\u0438\u0440\u0430\u0435\u043c\u0441\u044f \u0441 \u0442\u0435\u043c, \u0447\u0442\u043e-\u0442\u0430\u043a\u043e\u0435 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f \u0438 \u0444\u0440\u0435\u0439\u043c\u044b RabbitMQ. \u0427\u0430\u0441\u0442\u044c [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":69347,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-69346","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.5 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u043e\u0431\u0440\u044b\u0439 \u0434\u0435\u043d\u044c, \u0425\u0430\u0431\u0440! \u0425\u043e\u0447\u0443 \u043f\u043e\u0434\u0435\u043b\u0438\u0442\u044c\u0441\u044f \u0443\u0447\u0435\u0431\u043d\u0438\u043a\u043e\u043c-\u0441\u043f\u0440\u0430\u0432\u043e\u0447\u043d\u0438\u043a\u043e\u043c \u0437\u043d\u0430\u043d\u0438\u0439, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043c\u043d\u0435 \u0443\u0434\u0430\u043b\u043e\u0441\u044c \u0441\u043e\u0431\u0440\u0430\u0442\u044c \u043f\u043e RabbitMQ \u0438 \u0441\u0436\u0430\u0442\u044c \u0432 \u043a\u043e\u0440\u043e\u0442\u043a\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0438 \u0438 \u0432\u044b\u0432\u043e\u0434\u044b.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/hr\/blog\/administrirovanie\/rabbitmq-chast-1-introduction-erlang-amqp\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.5\" \/>\n\t\t<meta property=\"og:locale\" content=\"hr_HR\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47RabbitMQ. \u0427\u0430\u0441\u0442\u044c 1. 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