{"id":69621,"date":"2020-02-21T02:56:53","date_gmt":"2020-02-20T23:56:53","guid":{"rendered":"https:\/\/prohoster.info\/blog\/rabbitmq-chast-2-razbiraemsya-s-exchanges"},"modified":"2020-03-03T16:14:48","modified_gmt":"2020-03-03T13:14:48","slug":"rabbitmq-chast-2-razbiraemsya-s-exchanges","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/rabbitmq-chast-2-razbiraemsya-s-exchanges","title":{"rendered":"RabbitMQ. \u010c\u00e1st 2. Zkoum\u00e1me Exchanges","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><code>Exchange<\/code> \u2014 sm\u011bn\u00e1rna nebo v\u00fdm\u011bnn\u00fd bod. Do n\u011bj se odes\u00edlaj\u00ed zpr\u00e1vy. <code>Exchange<\/code> <strong>distribuuje zpr\u00e1vu<\/strong> do jedn\u00e9 nebo v\u00edce front. On <strong>sm\u011b\u0159uje zpr\u00e1vy do fronty<\/strong> na z\u00e1klad\u011b vytvo\u0159en\u00fdch vazeb (<code>bindings<\/code>) mezi n\u00edm a frontou. <\/p>\n<p><\/p>\n<p><code>Exchange<\/code> nen\u00ed <noindex><a rel=\"nofollow\" href=\"http:\/\/erlang.org\/doc\/reference_manual\/processes.html\">Erlang-procesem<\/a><\/noindex>. Z hlediska \u0161k\u00e1lovatelnosti <code>exchange<\/code> \u2014 to je \u0159et\u011bzec (odkaz na modul s k\u00f3dem, kde le\u017e\u00ed logika sm\u011brov\u00e1n\u00ed) ve vestav\u011bn\u00e9 datab\u00e1zi <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Mnesia\">mnesia<\/a><\/noindex>. 1 tis\u00edc v\u00fdm\u011bn bude pot\u0159ebovat jen 1MB pam\u011bti. <\/p>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3 id=\"oglavlenie\">Obsah<\/h3>\n<p><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/488654\/\">RabbitMQ. \u010c\u00e1st 1. \u00davod. Erlang, AMQP a RPC<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/489086\/\">RabbitMQ. \u010c\u00e1st 2. Zkoum\u00e1me Exchanges<\/a><\/noindex><\/li>\n<li>RabbitMQ. \u010c\u00e1st 3. Zkoum\u00e1me Queues a Bindings<\/li>\n<li>RabbitMQ. \u010c\u00e1st 4. Zkoum\u00e1me, co jsou zpr\u00e1vy a r\u00e1my<\/li>\n<li>RabbitMQ. \u010c\u00e1st 5. V\u00fdkon publikace a spot\u0159eby zpr\u00e1v<\/li>\n<li>RabbitMQ. \u010c\u00e1st 6. P\u0159ehled modul\u016f Federation a Shovel<\/li>\n<li>RabbitMQ. \u010c\u00e1st 7. Podrobn\u011b o Connection a Channel<\/li>\n<li>RabbitMQ. \u010c\u00e1st 8. RabbitMQ v .NET<\/li>\n<li>RabbitMQ. \u010c\u00e1st 9. Monitorov\u00e1n\u00ed<\/li>\n<\/ul>\n<p><\/p>\n<h4 id=\"direct-exchange\"><em>Direct Exchange<\/em><\/h4>\n<p><\/p>\n<p><code>Direct exchange<\/code> \u2014 pou\u017e\u00edv\u00e1 se, kdy\u017e je pot\u0159eba <strong>doru\u010dit zpr\u00e1vu do ur\u010dit\u00fdch front<\/strong>. Zpr\u00e1va je publikov\u00e1na v sm\u011bn\u00e1rn\u011b s ur\u010dit\u00fdm <strong>sm\u011brovac\u00edm kl\u00ed\u010dem<\/strong> a dost\u00e1v\u00e1 se do v\u0161ech front, kter\u00e9 jsou s touto sm\u011bn\u00e1rnou spojeny stejn\u00fdm sm\u011brovac\u00edm kl\u00ed\u010dem. <strong>Sm\u011brovac\u00ed kl\u00ed\u010d \u2014 to je \u0159et\u011bzec<\/strong>. Hled\u00e1n\u00ed shody prob\u00edh\u00e1 pomoc\u00ed <strong>ov\u011b\u0159ov\u00e1n\u00ed \u0159et\u011bzc\u016f na ekvivalenci<\/strong>.<\/p>\n<p><\/p>\n<p>Grafick\u00e9 zn\u00e1zorn\u011bn\u00ed toku zpr\u00e1v:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"RabbitMQ. \u010c\u00e1st 2. Zkoum\u00e1me Exchanges\" src=\"\/wp-content\/uploads\/2020\/02\/8ce3ab37542f2a7f8e7ac02a737c5f88.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>V <code>rabbitmq<\/code> existuje pojem <strong>sm\u011bn\u00e1rna podle defaultu<\/strong>. To je <code>direct exchange<\/code> bez n\u00e1zvu. Pokud se pou\u017e\u00edv\u00e1 sm\u011bn\u00e1rna podle defaultu, zpr\u00e1va bude sm\u011brov\u00e1na do fronty s n\u00e1zvem rovn\u00fdm <strong>sm\u011brovac\u00edmu kl\u00ed\u010di zpr\u00e1vy<\/strong>. <\/p>\n<p><\/p>\n<h4 id=\"topic-exchange\"><em>Topic Exchange<\/em><\/h4>\n<p><\/p>\n<p><code>Topic exchange<\/code> \u2013 obdobn\u011b <code>direct exchange<\/code> umo\u017e\u0148uje selektivn\u00ed sm\u011brov\u00e1n\u00ed porovn\u00e1v\u00e1n\u00edm sm\u011brovac\u00edho kl\u00ed\u010de. Ale v tomto p\u0159\u00edpad\u011b je kl\u00ed\u010d zad\u00e1n <strong>podle vzoru<\/strong>. P\u0159i vytv\u00e1\u0159en\u00ed vzoru se pou\u017e\u00edv\u00e1 <code>0<\/code> nebo v\u00edce slov (znaky <code>AZ<\/code> a <code>az<\/code> a \u010d\u00edslice <code>0-9<\/code>), odd\u011blen\u00fdch te\u010dkou, a tak\u00e9 symboly <code>*<\/code> a <code>#<\/code>. <\/p>\n<p><\/p>\n<ul>\n<li><code>*<\/code> \u2014 m\u016f\u017ee b\u00fdt nahrazen p\u0159esn\u011b <code>1<\/code> slovo <\/li>\n<li><code>#<\/code> \u2014 m\u016f\u017ee b\u00fdt nahrazen <code>0<\/code> nebo v\u00edce slovy <\/li>\n<\/ul>\n<p><\/p>\n<p>Grafick\u00e9 zn\u00e1zorn\u011bn\u00ed toku zpr\u00e1v:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"RabbitMQ. \u010c\u00e1st 2. Zkoum\u00e1me Exchanges\" src=\"\/wp-content\/uploads\/2020\/02\/a0ce48b291a3003eabbe61b3dfa5a4e1.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Za\u010d\u00ednaje verz\u00ed <code>RabbitMQ 2.4.0<\/code> se algoritmus sm\u011brov\u00e1n\u00ed pro <code>topic exchange<\/code> stal pracovat a\u017e <code>145<\/code> o n\u011bkolik rychlost\u00ed. Dos\u00e1hli toho pomoc\u00ed implementace <noindex><a rel=\"nofollow\" href=\"https:\/\/www.rabbitmq.com\/blog\/2011\/03\/28\/very-fast-and-scalable-topic-routing-part-2\/\">trie implementation<\/a><\/noindex>, kter\u00e1 \u043f\u043e\u0434\u0440\u0430\u0437\u0443\u043c\u0435\u0432\u0430\u0435\u0442 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0448\u0430\u0431\u043b\u043e\u043d\u016f \u0432 \u0432\u0438\u0434\u0435 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u044b \u0434\u0435\u0440\u0435\u0432\u0430. Nap\u0159\u00edklad vzory <code>a.b.c<\/code>, <code>a.*.b.c<\/code>, <code>a.#.c<\/code> a <code>b.b.c<\/code> budou zobrazeny n\u00e1sleduj\u00edc\u00ed strukturou:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"RabbitMQ. \u010c\u00e1st 2. Zkoum\u00e1me Exchanges\" src=\"\/wp-content\/uploads\/2020\/02\/56ef5809fec9eb6c1b50a362b89dd05a.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Hled\u00e1n\u00ed shody vzoru se prov\u00e1d\u00ed po\u010d\u00ednaje ko\u0159enem a pokra\u010duje shora dol\u016f.<\/p>\n<p><\/p>\n<p>Vlastnosti:<\/p>\n<p><\/p>\n<ul>\n<li>Pou\u017eit\u00ed tohoto v\u00fdm\u011bn\u00edku m\u016f\u017ee b\u00fdt <strong>dobrou volbou pro mo\u017en\u00e9 budouc\u00ed roz\u0161\u00ed\u0159en\u00ed aplikace<\/strong>, proto\u017ee \u0161ablony lze v\u017edy nastavit tak, aby zpr\u00e1vy byly publikov\u00e1ny obdobn\u011b <code>direct exchange<\/code> nebo <code>fanout exchange<\/code><\/li>\n<li>\u0161ablony, kter\u00e9 pou\u017e\u00edvaj\u00ed <code>*<\/code> <strong>mnohem rychleji<\/strong>, ne\u017e \u0161ablony, kter\u00e9 pou\u017e\u00edvaj\u00ed <code>#<\/code>. <\/li>\n<li><code>topic exchange<\/code> pomaleji <code>direct exchange<\/code><\/li>\n<\/ul>\n<p><\/p>\n<h4 id=\"fanout-exchange\"><em>Fanout Exchange<\/em><\/h4>\n<p><\/p>\n<p><code>Fanout exchange<\/code> \u2013 <strong>v\u0161echny zpr\u00e1vy jsou doru\u010dov\u00e1ny do v\u0161ech front<\/strong> i kdy\u017e je v zpr\u00e1v\u011b uveden kl\u00ed\u010d pro sm\u011brov\u00e1n\u00ed.<\/p>\n<p><\/p>\n<p>Vlastnosti:<\/p>\n<p><\/p>\n<ul>\n<li><code>RabbitMQ<\/code> <strong>nepracuje s kl\u00ed\u010di pro sm\u011brov\u00e1n\u00ed a \u0161ablonami<\/strong> co\u017e pozitivn\u011b ovliv\u0148uje v\u00fdkonnost. Je to nejrychlej\u0161\u00ed <code>exchange<\/code>;<\/li>\n<li>v\u0161ichni spot\u0159ebitel\u00e9 by m\u011bli m\u00edt mo\u017enost zpracov\u00e1vat v\u0161echny zpr\u00e1vy;<\/li>\n<\/ul>\n<p><\/p>\n<p>Grafick\u00e9 zn\u00e1zorn\u011bn\u00ed toku zpr\u00e1v:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"RabbitMQ. \u010c\u00e1st 2. Zkoum\u00e1me Exchanges\" src=\"\/wp-content\/uploads\/2020\/02\/575d86093f151016aef8058fc7d92907.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<h4 id=\"headers-exchange\"><em>Headers Exchange<\/em><\/h4>\n<p><\/p>\n<p><code>Headers exchange<\/code> \u2013 sm\u011bruje zpr\u00e1vy do souvisej\u00edc\u00edch front na z\u00e1klad\u011b porovn\u00e1n\u00ed p\u00e1r\u016f (kl\u00ed\u010d, hodnota) vlastnosti <code>headers<\/code> vazeb a podobn\u00e9 vlastnosti zpr\u00e1vy. <code>headers<\/code> p\u0159edstavuje <code>Dictionary&lt;kl\u00ed\u010d, hodnota&gt;<\/code>. <\/p>\n<p><\/p>\n<p>Pokud do slovn\u00edku p\u0159id\u00e1me speci\u00e1ln\u00ed kl\u00ed\u010d <code>x-match<\/code> s hodnotou <code>any<\/code>, zpr\u00e1va je sm\u011brov\u00e1na p\u0159i \u010d\u00e1ste\u010dn\u00e9 shod\u011b p\u00e1r\u016f (kl\u00ed\u010d, hodnota). Toto chov\u00e1n\u00ed je podobn\u00e9 oper\u00e1toru <code>or<\/code>. <\/p>\n<p><\/p>\n<pre><code class=\"cs\">var bindingArguments = new Dictinary();\nbindingArguments.add(\"x-match\", \"any\");<\/code><\/pre>\n<p><\/p>\n<p>Ve v\u00fdchoz\u00edm nastaven\u00ed kl\u00ed\u010d <code>x-match<\/code> obsahuje hodnotu <code>all<\/code>. To znamen\u00e1, \u017ee zpr\u00e1va je sm\u011brov\u00e1na p\u0159i \u00fapln\u00e9 shod\u011b p\u00e1r\u016f (kl\u00ed\u010d, hodnota). Toto chov\u00e1n\u00ed je podobn\u00e9 oper\u00e1toru <code>and<\/code>.<\/p>\n<p><\/p>\n<p>Grafick\u00e9 zn\u00e1zorn\u011bn\u00ed toku zpr\u00e1v:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"RabbitMQ. \u010c\u00e1st 2. Zkoum\u00e1me Exchanges\" src=\"\/wp-content\/uploads\/2020\/02\/e9a02a0df88cb2c0538b97cec9002bf4.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Vlastnosti:<\/p>\n<p><\/p>\n<ul>\n<li>dal\u0161\u00ed flexibilita<\/li>\n<li>dodate\u010dn\u00e9 n\u00e1klady na v\u00fdpo\u010det. V\u0161echny p\u00e1ry (kl\u00ed\u010d, hodnota) atributu <code>headers<\/code> mus\u00ed b\u00fdt se\u0159azeny podle n\u00e1zvu kl\u00ed\u010de p\u0159ed v\u00fdpo\u010dtem hodnot sm\u011brov\u00e1n\u00ed zpr\u00e1vy. <strong>Pomal\u011bj\u0161\u00ed ne\u017e ostatn\u00ed typy exchange<\/strong>.<\/li>\n<\/ul>\n<p><\/p>\n<h4 id=\"consistent-hashing-exchange\"><em>Consistent-Hashing Exchange<\/em><\/h4>\n<p><\/p>\n<p>Tento v\u00fdm\u011bn\u00edk je <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/rabbitmq\/rabbitmq-consistent-hash-exchange\">pluginem<\/a><\/noindex> a <strong>nen\u00ed zabudov\u00e1n<\/strong> v <code>RabbitMQ<\/code>.<\/p>\n<p><\/p>\n<p><code>Consistent-hashing exchange<\/code> (exchange s konzistentn\u00edm hashov\u00e1n\u00edm) \u2013 pou\u017e\u00edv\u00e1 se, kdy\u017e existuje n\u011bkolik front, kter\u00e9 jsou potenci\u00e1ln\u00edmi p\u0159\u00edjemci zpr\u00e1vy, a kdy\u017e je pot\u0159eba vyv\u00e1\u017eit z\u00e1t\u011b\u017e mezi nimi. Spojen\u00ed zpr\u00e1vy s frontou se d\u011bje na z\u00e1klad\u011b v\u00e1hy (podm\u00ednkov\u00e1 \u0159et\u011bzcov\u00e1 hodnota od <code>0 - n<\/code>). <\/p>\n<p><\/p>\n<p>Ekvivalentn\u00ed v\u00e1ha front \u2013 \u0159\u00edk\u00e1, \u017ee do ka\u017ed\u00e9 fronty p\u0159ijde <strong>p\u0159ibli\u017en\u011b stejn\u00fd po\u010det<\/strong> zpr\u00e1v (ka\u017ed\u00e1 zpr\u00e1va bude um\u00edst\u011bna pouze do jedn\u00e9 fronty). <strong>Nen\u00ed zaru\u010deno rovnom\u011brn\u00e9 rozlo\u017een\u00ed zpr\u00e1v<\/strong>. <\/p>\n<p><\/p>\n<p>Grafick\u00e9 zn\u00e1zorn\u011bn\u00ed toku zpr\u00e1v:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"RabbitMQ. \u010c\u00e1st 2. Zkoum\u00e1me Exchanges\" src=\"\/wp-content\/uploads\/2020\/02\/dd22749cad463fe86619a98276554e10.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p><code>Hash<\/code> je vypo\u010d\u00edt\u00e1n na z\u00e1klad\u011b kl\u00ed\u010de pro sm\u011brov\u00e1n\u00ed nebo vlastnosti <code>headers<\/code> zpr\u00e1vy. Pokud v\u0161echny publikovan\u00e9 zpr\u00e1vy m\u011bly r\u016fzn\u00e9 kl\u00ed\u010de pro sm\u011brov\u00e1n\u00ed nebo <code>headers<\/code>, distribuce bude prob\u00edhat podle hmotnosti. Jinak se pou\u017eije sm\u011brovac\u00ed kl\u00ed\u010d nebo <code>headers<\/code>.<\/p>\n<p><\/p>\n<p><strong>M\u011blo by pom\u00e1hat, kdy\u017e \u0161\u00ed\u0159ka p\u00e1sma spot\u0159ebitele pot\u0159ebuje r\u016fst v\u00edce ne\u017e \u0159e\u0161en\u00ed s v\u00edce spot\u0159ebiteli, kte\u0159\u00ed sd\u00edlej\u00ed jednu frontu.<\/strong><\/p>\n<p><\/p>\n<h4 id=\"kombinirovanie-obmennikov-e2e\"><em>Kombinov\u00e1n\u00ed sm\u011bnn\u00edk\u016f (E2E)<\/em><\/h4>\n<p><\/p>\n<p>Chov\u00e1n\u00ed v\u0161ech sm\u011bnn\u00edk\u016f lze kombinovat pomoc\u00ed spojen\u00ed <strong>Exchange-to-Exchange<\/strong> (kombinace sm\u011bnn\u00edk\u016f nen\u00ed sou\u010d\u00e1st\u00ed specifikace <code>AMQP<\/code>. To je roz\u0161\u00ed\u0159en\u00ed protokolu z pohledu <code>RabbitMQ<\/code>).<\/p>\n<p><\/p>\n<p>Grafick\u00e9 zn\u00e1zorn\u011bn\u00ed toku zpr\u00e1v:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"RabbitMQ. \u010c\u00e1st 2. Zkoum\u00e1me Exchanges\" src=\"\/wp-content\/uploads\/2020\/02\/41ea01a0f43f2dd195fa4f34f7fc176c.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>D\u00edky <code>E2E<\/code> m\u016f\u017eeme naj\u00edt spr\u00e1vnou \u0161k\u00e1lovatelnou konfiguraci, kter\u00e1 vyhovuje jak aktu\u00e1ln\u00edm, tak rostouc\u00edm po\u017eadavk\u016fm.<\/p>\n<p><\/p>\n<h4 id=\"sozdanie-exchange\"><em>Vytvo\u0159en\u00ed Exchange<\/em><\/h4>\n<p><\/p>\n<p>Vytvo\u0159en\u00ed sm\u011bnn\u00edku prob\u00edh\u00e1 pomoc\u00ed synchronn\u00edho <code>RPC<\/code> \u017e\u00e1dosti k serveru. \u017d\u00e1dost je realizov\u00e1na pomoc\u00ed metody <code>Exchange.Declare<\/code>, volan\u00e9 s parametry:<\/p>\n<p><\/p>\n<ul>\n<li>n\u00e1zev sm\u011bnn\u00edku<\/li>\n<li>typ sm\u011bnn\u00edku<\/li>\n<li>dal\u0161\u00ed parametry<\/li>\n<\/ul>\n<p><\/p>\n<p>P\u0159\u00edklad vytvo\u0159en\u00ed <code>exchange<\/code> pomoc\u00ed <noindex><a rel=\"nofollow\" href=\"https:\/\/www.rabbitmq.com\/dotnet.html\">RabbitMQ.Client<\/a><\/noindex>:<\/p>\n<p><\/p>\n<pre><code class=\"cs\">\/\/...\nchannel.ExchangeDeclare(\n    exchange: &quot;my_exchange&quot;,\n    type: &quot;direct&quot;,\n    durable: &quot;false&quot;,\n    autoDelete: &quot;false&quot;,\n    arguments: null\n);\n\/\/...<\/code><\/pre>\n<p><\/p>\n<ul>\n<li><code>exchange<\/code> \u2014 n\u00e1zev sm\u011bnn\u00edku, kter\u00fd chceme vytvo\u0159it. N\u00e1zev mus\u00ed b\u00fdt jedine\u010dn\u00fd<\/li>\n<li><code>type<\/code> \u2014 typ sm\u011bnn\u00edku<\/li>\n<li><code>durable<\/code> \u2014 pokud je nastaveno <code>true<\/code>, pak <code>exchange<\/code> bude trval\u00fd. Bude ulo\u017een na disku a p\u0159e\u010dk\u00e1 restart serveru\/brokera. Pokud je hodnota <code>false<\/code>, pak <code>exchange<\/code> do\u010dasn\u00e1 a bude odstran\u011bna, kdy\u017e bude server\/broker restartov\u00e1n<\/li>\n<li><code>autoDelete<\/code> \u2014 automatick\u00e9 odstran\u011bn\u00ed. <code>Exchange<\/code> bude odstran\u011bn, kdy\u017e budou odstran\u011bny v\u0161echny s n\u00edm spojen\u00e9 fronty<\/li>\n<li><code>arguments<\/code> \u2014 voliteln\u00e9 argumenty. Nej\u010dast\u011bji se prost\u0159ednictv\u00edm argument\u016f ur\u010duje <code>alternative exchange<\/code> (<strong>alternativn\u00ed sm\u011bnn\u00edk<\/strong>). Pokud zpr\u00e1va nem\u016f\u017ee proj\u00edt p\u016fvodn\u00ed trasou, m\u016f\u017ee b\u00fdt odesl\u00e1na do alternativn\u00edho sm\u011bnn\u00edku pro sm\u011brov\u00e1n\u00ed jinou cestou.<\/li>\n<\/ul>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"RabbitMQ. \u010c\u00e1st 2. Zkoum\u00e1me Exchanges\" src=\"\/wp-content\/uploads\/2020\/02\/6a352e92f94dadf58ba24de453806133.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Pokud je vytvo\u0159en\u00ed <code>exchange<\/code> <strong>mo\u017en\u00e9<\/strong>, pak server ode\u0161le klientovi synchronn\u00ed <code>RPC<\/code> odpov\u011b\u010f <code>Exchange.DeclareOk<\/code>. Pokud je vytvo\u0159en\u00ed <strong>nemo\u017en\u00e9<\/strong> (do\u0161lo k odm\u00edtnut\u00ed \u017e\u00e1dosti <code>Exchange.Declare<\/code>), pak <strong>kan\u00e1l bude uzav\u0159en<\/strong> serverem pomoc\u00ed asynchronn\u00edho p\u0159\u00edkazu <code>Channel.Close<\/code> a klient obdr\u017e\u00ed v\u00fdjimku <noindex><a rel=\"nofollow\" href=\"https:\/\/www.rabbitmq.com\/releases\/rabbitmq-dotnet-client\/v3.6.10\/rabbitmq-dotnet-client-3.6.10-client-htmldoc\/html\/type-RabbitMQ.Client.Exceptions.OperationInterruptedException.html\">OperationInterruptedException<\/a><\/noindex>, kter\u00e1 bude obsahovat k\u00f3d chyby a jej\u00ed popis. <\/p>\n<p><\/p>\n<p>Sm\u011bnn\u00edk mus\u00ed b\u00fdt vytvo\u0159en p\u0159ed publikov\u00e1n\u00edm zpr\u00e1v. Pokud publikujete zpr\u00e1vu do neexistuj\u00edc\u00edho sm\u011bnn\u00edku \u2014 <code>RabbitMQ<\/code> ti\u0161e ji odstran\u00ed.<\/p>\n<p><\/p>\n<h4 id=\"sozdanie-exchange-cherez-graficheskiy-interfeys\"><em>Vytvo\u0159en\u00ed Exchange prost\u0159ednictv\u00edm grafick\u00e9ho rozhran\u00ed<\/em><\/h4>\n<p><\/p>\n<p>P\u0159ejdeme do administr\u00e1torsk\u00e9 panelu <code>RabbitMQ<\/code> pod u\u017eivatelsk\u00fdm jm\u00e9nem <code>guest<\/code> (u\u017eivatelsk\u00e9 jm\u00e9no: <code>guest<\/code> a heslo: <code>guest<\/code>). V\u0161imn\u011bte si, \u017ee u\u017eivatel <code>guest<\/code> se m\u016f\u017ee p\u0159ipojit pouze z m\u00edstn\u00edho hostitele. Nyn\u00ed p\u0159ejdeme na kartu <code>Exchanges<\/code> a klikneme na <code>P\u0159idat nov\u00fd exchange<\/code>. Vypl\u0148te vlastnosti:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"RabbitMQ. \u010c\u00e1st 2. Zkoum\u00e1me Exchanges\" src=\"\/wp-content\/uploads\/2020\/02\/c4fd31b8cdb8182690ec8c01ccd2a460.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>V\u011bt\u0161ina vlastnost\u00ed byla pops\u00e1na v\u00fd\u0161e. Zde zd\u016frazn\u00edme, \u017ee pokud nastav\u00edte <code>Intern\u00ed<\/code>, bude mo\u017en\u00e9 pou\u017e\u00edvat exchange pouze pro <code>E2E<\/code>. <code>Producent<\/code> nebude moci pos\u00edlat zpr\u00e1vy na takov\u00fd exchange.<\/p>\n<p><\/p>\n<h3 id=\"zaklyuchenie\">Z\u00e1v\u011br<\/h3>\n<p><\/p>\n<p>P\u0159i v\u00fdvoji syst\u00e9mu je pohodln\u00e9 popisovat topologii <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%9C%D0%B0%D1%80%D1%88%D1%80%D1%83%D1%82%D0%B8%D0%B7%D0%B0%D1%86%D0%B8%D1%8F\">sm\u011brov\u00e1n\u00ed<\/a><\/noindex> pomoc\u00ed grafu. Ale ne\u017e za\u010dnete stav\u011bt graf, je dobr\u00e9 vy\u010dlenit cesty s vysok\u00fdm provozem, proto\u017ee pr\u00e1v\u011b ty vy\u017eaduj\u00ed <strong>vy\u0161\u0161\u00ed propustnost<\/strong> (v\u00fdkon). D\u00e1le m\u016f\u017eete klasifikovat provoz. A a\u017e pot\u00e9 p\u0159istoupit k budov\u00e1n\u00ed.<\/p>\n<p><\/p>\n<p>Pokud v postaven\u00e9m grafu existuje <strong>kone\u010dn\u00e9 mno\u017estv\u00ed<\/strong> kl\u00ed\u010d\u016f sm\u011brov\u00e1n\u00ed, je dobr\u00e9 pod\u00edvat se na n\u011bkolik <code>fanout exchange<\/code>, kter\u00e9 jsou 1:1 spojeny s kl\u00ed\u010dem sm\u011brov\u00e1n\u00ed. Pamatujeme, \u017ee <code>fanout exchange<\/code> je nejrychlej\u0161\u00ed.<\/p>\n<p><\/p>\n<p>Pokud se po\u010det tras <strong>bl\u00ed\u017e\u00ed k nekone\u010dnu<\/strong>, je dobr\u00e9 v\u011bnovat pozornost <code>topic exchange<\/code> nebo, pokud \u0161ablona nen\u00ed pot\u0159ebn\u00e1, m\u016f\u017eete zvolit <code>p\u0159\u00edm\u00fd exchange<\/code>, proto\u017ee je rychlej\u0161\u00ed. <code>topic exchange<\/code>.<\/p>\n<p><\/p>\n<p>Kombinace r\u016fzn\u00fdch <code>exchange<\/code> by m\u011bla pomoci nal\u00e9zt spr\u00e1vnou <strong>\u0161k\u00e1lovatelnou konfiguraci<\/strong>, kter\u00e1 spl\u0148uje jak aktu\u00e1ln\u00ed, tak rostouc\u00ed po\u017eadavky syst\u00e9mu.<\/p>\n<p><\/p>\n<p>Po\u010det <code>exchange<\/code> a front by m\u011blo b\u00fdt minim\u00e1ln\u00ed v porovn\u00e1n\u00ed s po\u010dtem tras.<\/p>\n<p><\/p>\n<p>V dal\u0161\u00edm \u010dl\u00e1nku se za\u010dneme podrobn\u011bji zab\u00fdvat Queues a Bindings.<\/p>\n<p><\/p>\n<h3 id=\"ssylki\">Odkazy<\/h3>\n<p><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/www.rabbitmq.com\/\">Web projektu RabbitMQ<\/a><\/noindex><\/li>\n<\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/489086\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>Exchange \u2014 \u043e\u0431\u043c\u0435\u043d\u043d\u0438\u043a \u0438\u043b\u0438 \u0442\u043e\u0447\u043a\u0430 \u043e\u0431\u043c\u0435\u043d\u0430. \u0412 \u043d\u0435\u0433\u043e \u043e\u0442\u043f\u0440\u0430\u0432\u043b\u044f\u044e\u0442\u0441\u044f \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f. Exchange \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0435\u0442 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435 \u0432 \u043e\u0434\u043d\u0443 \u0438\u043b\u0438 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043e\u0447\u0435\u0440\u0435\u0434\u0435\u0439. \u041e\u043d \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0438\u0440\u0443\u0435\u0442 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f \u0432 \u043e\u0447\u0435\u0440\u0435\u0434\u044c \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u0441\u043e\u0437\u0434\u0430\u043d\u043d\u044b\u0445 \u0441\u0432\u044f\u0437\u0435\u0439 (bindings) \u043c\u0435\u0436\u0434\u0443 \u043d\u0438\u043c \u0438 \u043e\u0447\u0435\u0440\u0435\u0434\u044c\u044e. Exchange \u043d\u0435 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f Erlang-\u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u043c. \u0418\u0437 \u0441\u043e\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u0439 \u043c\u0430\u0441\u0448\u0442\u0430\u0431\u0438\u0440\u0443\u0435\u043c\u043e\u0441\u0442\u0438 exchange \u2014 \u044d\u0442\u043e \u0441\u0442\u0440\u043e\u043a\u0430 (\u0441\u0441\u044b\u043b\u043a\u0430 \u043d\u0430 \u043c\u043e\u0434\u0443\u043b\u044c \u0441 \u043a\u043e\u0434\u043e\u043c, \u0433\u0434\u0435 \u043b\u0435\u0436\u0438\u0442 \u043b\u043e\u0433\u0438\u043a\u0430 \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0430\u0446\u0438\u0438) \u0432\u043e \u0432\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u043e\u0439 \u0431\u0430\u0437\u0435 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":69622,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-69621","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Exchange \u2014 \u043e\u0431\u043c\u0435\u043d\u043d\u0438\u043a \u0438\u043b\u0438 \u0442\u043e\u0447\u043a\u0430 \u043e\u0431\u043c\u0435\u043d\u0430. \u0412 \u043d\u0435\u0433\u043e \u043e\u0442\u043f\u0440\u0430\u0432\u043b\u044f\u044e\u0442\u0441\u044f \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f. Exchange \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0435\u0442 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435 \u0432 \u043e\u0434\u043d\u0443 \u0438\u043b\u0438 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043e\u0447\u0435\u0440\u0435\u0434\u0435\u0439.\" \/>\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\/cs\/blog\/administrirovanie\/rabbitmq-chast-2-razbiraemsya-s-exchanges\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<meta property=\"og:locale\" content=\"cs_CZ\" \/>\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 2. \u0420\u0430\u0437\u0431\u0438\u0440\u0430\u0435\u043c\u0441\u044f \u0441 Exchanges | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"Exchange \u2014 \u043e\u0431\u043c\u0435\u043d\u043d\u0438\u043a \u0438\u043b\u0438 \u0442\u043e\u0447\u043a\u0430 \u043e\u0431\u043c\u0435\u043d\u0430. \u0412 \u043d\u0435\u0433\u043e \u043e\u0442\u043f\u0440\u0430\u0432\u043b\u044f\u044e\u0442\u0441\u044f \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f. Exchange \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0435\u0442 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435 \u0432 \u043e\u0434\u043d\u0443 \u0438\u043b\u0438 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043e\u0447\u0435\u0440\u0435\u0434\u0435\u0439.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/rabbitmq-chast-2-razbiraemsya-s-exchanges\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2020-02-20T23:56:53+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2020-03-03T13:14:48+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47RabbitMQ. \u010c\u00e1st 2. Zkoum\u00e1me Exchanges | ProHoster","description":"Exchange \u2014 v\u00fdm\u011bn\u00edk nebo bod v\u00fdm\u011bny. Do n\u011bj jsou odes\u00edl\u00e1ny zpr\u00e1vy. Exchange distribuuje zpr\u00e1vu do jedn\u00e9 nebo v\u00edce front.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/rabbitmq-chast-2-razbiraemsya-s-exchanges","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","og:site_name":"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","og:type":"article","og:title":"\ud83e\udd47RabbitMQ. \u0427\u0430\u0441\u0442\u044c 2. \u0420\u0430\u0437\u0431\u0438\u0440\u0430\u0435\u043c\u0441\u044f \u0441 Exchanges | ProHoster","og:description":"Exchange \u2014 \u043e\u0431\u043c\u0435\u043d\u043d\u0438\u043a \u0438\u043b\u0438 \u0442\u043e\u0447\u043a\u0430 \u043e\u0431\u043c\u0435\u043d\u0430. \u0412 \u043d\u0435\u0433\u043e \u043e\u0442\u043f\u0440\u0430\u0432\u043b\u044f\u044e\u0442\u0441\u044f \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f. Exchange \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0435\u0442 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435 \u0432 \u043e\u0434\u043d\u0443 \u0438\u043b\u0438 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043e\u0447\u0435\u0440\u0435\u0434\u0435\u0439.","og:url":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/rabbitmq-chast-2-razbiraemsya-s-exchanges","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2020-02-20T23:56:53+00:00","article:modified_time":"2020-03-03T13:14:48+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"69621","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-02-28 17:31:26","updated":"2022-09-28 03:24:29","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/69621","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=69621"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/69621\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media\/69622"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=69621"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=69621"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=69621"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}