{"id":94393,"date":"2020-09-16T07:43:43","date_gmt":"2020-09-16T05:43:43","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/mikroservisy-s-kommunikacziej-cherez-axon"},"modified":"2020-09-16T07:43:43","modified_gmt":"2020-09-16T05:43:43","slug":"mikroservisy-s-kommunikacziej-cherez-axon","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/mikroservisy-s-kommunikacziej-cherez-axon","title":{"rendered":"Mikroslu\u017eby s komunikac\u00ed p\u0159es Axon","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>V tomto jednoduch\u00e9m tutori\u00e1lu vytvo\u0159\u00edme n\u011bkolik mikroslu\u017eeb na Spring Boot a zorganizujeme jejich interakci prost\u0159ednictv\u00edm frameworku Axon.<\/p>\n<p><img decoding=\"async\" alt=\"Mikroslu\u017eby s komunikac\u00ed p\u0159es Axon\" src=\"\/wp-content\/uploads\/2020\/09\/d570cdb88653309c2f5b382509e5c2a9.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<i>P\u0159edpokl\u00e1dejme, \u017ee m\u00e1me takov\u00fd \u00fakol.<\/i><\/p>\n<p>Existuje zdroj obchod\u016f na akciov\u00e9m trhu. Tento zdroj n\u00e1m p\u0159ed\u00e1v\u00e1 obchody prost\u0159ednictv\u00edm REST rozhran\u00ed. <\/p>\n<p>Mus\u00edme tyto obchody z\u00edskat, ulo\u017eit do datab\u00e1ze a vytvo\u0159it pohodln\u00e9 in-memory \u00falo\u017ei\u0161t\u011b. <\/p>\n<p>Toto \u00falo\u017ei\u0161t\u011b by m\u011blo vykon\u00e1vat n\u00e1sleduj\u00edc\u00ed funkce:<\/p>\n<ul>\n<li> vracet seznam obchod\u016f;<\/li>\n<li> vracet \u00faplnou pozici, tj. tabulku \"n\u00e1stroj\" \u2014 \"aktu\u00e1ln\u00ed po\u010det cenn\u00fdch pap\u00edr\u016f\";<\/li>\n<li> vracet pozici podle dan\u00e9ho n\u00e1stroje.<\/li>\n<\/ul>\n<p>\n<i>Jak p\u0159istoup\u00edme k \u0159e\u0161en\u00ed tohoto \u00fakolu? <\/i><\/p>\n<p>Podle z\u00e1sad mikroslu\u017eeb mus\u00edme \u00fakol rozd\u011blit na jednotliv\u00e9 mikroslu\u017eby:<\/p>\n<ul>\n<li> z\u00edsk\u00e1n\u00ed obchodu p\u0159es REST;<\/li>\n<li> ulo\u017een\u00ed obchodu do datab\u00e1ze;<\/li>\n<li> in-memory \u00falo\u017ei\u0161t\u011b pro prezentaci dat o pozici.<\/li>\n<\/ul>\n<p>\nPoj\u010fme v r\u00e1mci tohoto tutori\u00e1lu vytvo\u0159it prvn\u00ed a t\u0159et\u00ed slu\u017ebu, druhou nech\u00e1me na druhou \u010d\u00e1st (napi\u0161te do koment\u00e1\u0159\u016f, pokud je to zaj\u00edmav\u00e9).<\/p>\n<p>Tak\u017ee m\u00e1me dv\u011b mikroslu\u017eby. <\/p>\n<p>Prvn\u00ed z\u00edsk\u00e1v\u00e1 data zven\u010d\u00ed. <\/p>\n<p>Druh\u00e1 tato data zpracov\u00e1v\u00e1 a odpov\u00edd\u00e1 na p\u0159\u00edchoz\u00ed po\u017eadavky. <\/p>\n<p>Samoz\u0159ejm\u011b chceme dos\u00e1hnout horizont\u00e1ln\u00edho \u0161k\u00e1lov\u00e1n\u00ed, bezprobl\u00e9mov\u00fdch aktualizac\u00ed a dal\u0161\u00edch v\u00fdhod mikroslu\u017eeb.<\/p>\n<p><i>Jak\u00fd, velmi komplikovan\u00fd, \u00fakol p\u0159ed n\u00e1mi stoj\u00ed?<\/i><\/p>\n<p>Ve skute\u010dnosti je jich mnoho, ale te\u010f se poj\u010fme pobavit o tom, jak budou mezi t\u011bmito mikroslu\u017ebami proudit data. Mezi nimi lze tak\u00e9 vytvo\u0159it REST, m\u016f\u017eete pou\u017e\u00edt n\u011bjakou frontu, m\u016f\u017eete s mnoha v\u011bcmi p\u0159ij\u00edt se sv\u00fdmi plusy a m\u00ednusy.<\/p>\n<p>Pod\u00edvejme se na jeden z mo\u017en\u00fdch p\u0159\u00edstup\u016f \u2013 asynchronn\u00ed interakci prost\u0159ednictv\u00edm <b>frameworku Axon<\/b>.<\/p>\n<p><i>Jak\u00e9 v\u00fdhody toto \u0159e\u0161en\u00ed p\u0159in\u00e1\u0161\u00ed?<\/i><\/p>\n<p>Za prv\u00e9, asynchronn\u00ed interakce zvy\u0161uje flexibilitu (ano, zde je tak\u00e9 nev\u00fdhoda, ale nyn\u00ed jsme pr\u00e1v\u011b jen o v\u00fdhod\u00e1ch). <\/p>\n<p>Za druh\u00e9, dost\u00e1v\u00e1me p\u0159\u00edmo z krabice <b>Event Sourcing<\/b> a <b>CQRS<\/b>. <br \/>\nZa t\u0159et\u00ed, Axon poskytuje hotovou infrastrukturu, a my se mus\u00edme soust\u0159edit pouze na v\u00fdvoj obchodn\u00ed logiky.<\/p>\n<p>Za\u010dn\u011bme.<\/p>\n<p>Projekt bude na Gradlu. Bude m\u00edt t\u0159i moduly: <\/p>\n<ul>\n<li> common. modul s obecn\u00fdmi datov\u00fdmi strukturami (nem\u00e1me r\u00e1di kop\u00edrov\u00e1n\u00ed);<\/li>\n<li> tradeCreator. modul s mikroslu\u017ebou pro p\u0159ij\u00edm\u00e1n\u00ed obchod\u016f p\u0159es REST;<\/li>\n<li> tradeQueries. modul s mikroslu\u017ebou pro zobrazen\u00ed pozice.<\/li>\n<\/ul>\n<p>\nVezmeme Spring Boot jako z\u00e1klad a p\u0159ipoj\u00edme Axon starter.<\/p>\n<p>Axon funguje skv\u011ble i bez Springu, ale budeme je pou\u017e\u00edvat spolu.<\/p>\n<p>Tady bychom se m\u011bli na chv\u00edli zastavit a \u0159\u00edct p\u00e1r slov o Axonu. <\/p>\n<p>Jedn\u00e1 se o klient-server syst\u00e9m. Je tu server \u2013 to je samostatn\u00e1 aplikace, kterou spust\u00edme v Dockeru. <\/p>\n<p>A jsou tu klienti, kte\u0159\u00ed se integruj\u00ed do mikroservis\u016f. <br \/>\nVytv\u00e1\u0159\u00ed se takov\u00fd obr\u00e1zek. Nejprve se spust\u00ed Axon server (v Dockeru), a pot\u00e9 na\u0161e mikroservisy. <\/p>\n<p>P\u0159i spu\u0161t\u011bn\u00ed mikroservisy hledaj\u00ed server a za\u010d\u00ednaj\u00ed s n\u00edm komunikovat. Komunikaci m\u016f\u017eeme podm\u00edn\u011bn\u011b rozd\u011blit na dva typy: technickou a obchodn\u00ed. <\/p>\n<p>Technick\u00e1 \u2013 to je v\u00fdm\u011bna zpr\u00e1v typu 'jsem na\u017eivu' (takov\u00e9 zpr\u00e1vy lze vid\u011bt v re\u017eimu debugov\u00e1n\u00ed). <\/p>\n<p>Obchodn\u00ed \u2013 to je v\u00fdm\u011bna zpr\u00e1v typu 'nov\u00fd obchod'.<\/p>\n<p>D\u016fle\u017eit\u00e1 vlastnost: po spu\u0161t\u011bn\u00ed se mikroservis m\u016f\u017ee zeptat Axon serveru 'co se stalo' a server p\u0159ed\u00e1v\u00e1 mikroservisu nahromad\u011bn\u00e9 ud\u00e1losti. Takto lze mikroservis relativn\u011b bezpe\u010dn\u011b restartovat bez ztr\u00e1ty dat. <br \/>\nP\u0159i takov\u00e9m sch\u00e9matu v\u00fdm\u011bny m\u016f\u017eeme velmi jednodu\u0161e spou\u0161t\u011bt mnoho instanc\u00ed mikroservis\u016f, <br \/>\na to i na r\u016fzn\u00fdch hostitel\u00edch.<\/p>\n<p>Ano, jedna instance Axon serveru \u2013 to nen\u00ed spolehliv\u00e9, ale zat\u00edm je to tak.<\/p>\n<p>Pracujeme v paradigma Event Sourcing a CQRS. To znamen\u00e1, \u017ee mus\u00edme m\u00edt 'p\u0159\u00edkazy', 'ud\u00e1losti' a 'dotazy'. <\/p>\n<p>Budeme m\u00edt jeden p\u0159\u00edkaz: 'vytvo\u0159it obchod', jednu ud\u00e1lost 'obchod vytvo\u0159en' a t\u0159i dotazy: 'zobrazit v\u0161echny obchody', 'zobrazit pozici', 'zobrazit pozici podle n\u00e1stroje'.<\/p>\n<p>Sch\u00e9ma pr\u00e1ce vypad\u00e1 takto: <\/p>\n<ol>\n<li> Mikroservis tradeCreator p\u0159ij\u00edm\u00e1 obchod p\u0159es Rest.<\/li>\n<li> Mikroservis tradeCreator vytv\u00e1\u0159\u00ed p\u0159\u00edkaz 'vytvo\u0159it obchod' a pos\u00edl\u00e1 jej do Axon serveru.<\/li>\n<li> Axon server p\u0159ij\u00edm\u00e1 p\u0159\u00edkaz a p\u0159epos\u00edl\u00e1 ho z\u00fa\u010dastn\u011bn\u00e9mu p\u0159\u00edjemci, v na\u0161em p\u0159\u00edpad\u011b mikroservisu tradeCreator.<\/li>\n<li> Mikroservis tradeCreator obdr\u017e\u00ed p\u0159\u00edkaz, vytvo\u0159\u00ed ud\u00e1lost 'obchod vytvo\u0159en' a ode\u0161le ji Axon serveru.<\/li>\n<li> Axon server p\u0159ij\u00edm\u00e1 ud\u00e1lost a p\u0159epos\u00edl\u00e1 ji zainteresovan\u00fdm odb\u011bratel\u016fm.<\/li>\n<li> V sou\u010dasnosti m\u00e1me jen jednoho zainteresovan\u00e9ho p\u0159\u00edjemce \u2013 mikroservis tradeQueries.<\/li>\n<li> Mikroservis tradeQueries obdr\u017e\u00ed ud\u00e1lost a aktualizuje intern\u00ed data.<\/li>\n<\/ol>\n<p>\n(D\u016fle\u017eit\u00e9 je, \u017ee v okam\u017eiku vytvo\u0159en\u00ed ud\u00e1losti mikroservis tradeQueries nemus\u00ed b\u00fdt dostupn\u00fd, ale jakmile se spust\u00ed, okam\u017eit\u011b obdr\u017e\u00ed ud\u00e1lost).<\/p>\n<p>Ano, Axon server stoj\u00ed v centru komunikac\u00ed, v\u0161echny zpr\u00e1vy proch\u00e1zej\u00ed p\u0159es n\u011bj.<\/p>\n<p><i>P\u0159ejd\u011bme k programov\u00e1n\u00ed.<\/i><\/p>\n<p>Abychom nezahltili p\u0159\u00edsp\u011bvek k\u00f3dem, n\u00ed\u017ee uvedu pouze fragmenty, odkaz na cel\u00fd p\u0159\u00edklad bude n\u00ed\u017ee.<\/p>\n<p>Za\u010dneme s obecn\u00fdm modulem common.<\/p>\n<p>V n\u011bm jsou spole\u010dn\u00e9 \u010d\u00e1sti \u2013 ud\u00e1lost (class CreatedTradeEvent). V\u0161imn\u011bte si pojmenov\u00e1n\u00ed, v podstat\u011b to je n\u00e1zev p\u0159\u00edkazu, kter\u00fd tuto ud\u00e1lost vyvolal, ale v minul\u00e9m \u010dase. V minul\u00e9m \u010dase, proto\u017ee nejprve se objev\u00ed p\u0159\u00edkaz, kter\u00fd vede k vytvo\u0159en\u00ed ud\u00e1losti.<\/p>\n<p>Mezi dal\u0161\u00ed obecn\u00e9 struktury pat\u0159\u00ed t\u0159\u00eddy pro popis pozice (class Position), obchodu (class Trade) a strany obchodu (enum Side), tj. koup\u011b nebo prodej.<\/p>\n<p>P\u0159ejdeme k modulu tradeCreator. <\/p>\n<p>Tento modul m\u00e1 REST rozhran\u00ed (class TradeController) pro p\u0159ij\u00edm\u00e1n\u00ed obchod\u016f. <br \/>\nZe z\u00edskan\u00e9ho obchodu se vytv\u00e1\u0159\u00ed p\u0159\u00edkaz \u201evytvo\u0159it obchod\u201c a je odesl\u00e1n na Axon server.<\/p>\n<pre><code class=\"java\">    @PostMapping(\"\/trade\")\n    public ResponseEntity create(@RequestBody Trade trade) {\n        var createTradeCommand = CreateTradeCommand.builder()\n                .tradeId(trade.getTradeId())\n\t...\n                .build();\n        var result = commandGateway.sendAndWait(createTradeCommand, 3, TimeUnit.SECONDS);\n        return ResponseEntity.ok(result.get().toString());\n    }\n<\/code><\/pre>\n<p>\nPro zpracov\u00e1n\u00ed p\u0159\u00edkazu se pou\u017e\u00edv\u00e1 t\u0159\u00edda class TradeAggregate. <br \/>\nAby ho Axon na\u0161el, p\u0159id\u00e1me anotaci @Aggregate.<br \/>\nMetoda pro zpracov\u00e1n\u00ed p\u0159\u00edkazu vypad\u00e1 takto (s v\u00fdse\u010d\u00ed):<\/p>\n<pre><code class=\"java\">    @CommandHandler\n    public TradeAggregate(CreateTradeCommand command) {\n        log.info(\"command: {}\", command);\n        var event = CreatedTradeEvent.builder()\n                .tradeId(command.tradeId())\n\t\t....\n                .build();\n        AggregateLifecycle.apply(event);\n    }\n<\/code><\/pre>\n<p>\nZ p\u0159\u00edkazu se vytv\u00e1\u0159\u00ed ud\u00e1lost a odes\u00edl\u00e1 se na server.<br \/>\nP\u0159\u00edkaz se nach\u00e1z\u00ed ve t\u0159\u00edd\u011b CreateTradeCommand.<\/p>\n<p>Te\u010f se pod\u00edv\u00e1me na posledn\u00ed modul tradeQueries.<\/p>\n<p>Dotazy jsou pops\u00e1ny v bal\u00ed\u010dku queries.<br \/>\nV tomto modulu tak\u00e9 existuje REST rozhran\u00ed<br \/>\npublic class TradeController.<\/p>\n<p>Pro p\u0159\u00edklad se pod\u00edv\u00e1me na zpracov\u00e1n\u00ed dotazu: \u201ezobrazit v\u0161echny obchody\u201c.<\/p>\n<pre><code class=\"java\">    @GetMapping(\"\/trade\/all\")\n    public List findAllTrades() {\n        return queryGateway.query(new FindAllTradesQuery(),\n                ResponseTypes.multipleInstancesOf(Trade.class)).join();\n    }\n<\/code><\/pre>\n<p>\nVytv\u00e1\u0159\u00ed se dotaz na v\u00fdb\u011br a odes\u00edl\u00e1 se na server.<\/p>\n<p>Pro zpracov\u00e1n\u00ed dotazu na v\u00fdb\u011br se pou\u017e\u00edv\u00e1 t\u0159\u00edda TradesEventHandler.<br \/>\nV n\u00ed je metoda, ozna\u010den\u00e1 anotac\u00ed<\/p>\n<pre><code class=\"java\">   @QueryHandler\n    public List handleFindCurrentPositionQuery(FindCurrentPositionQuery query)\n<\/code><\/pre>\n<p>\nTa je zodpov\u011bdn\u00e1 za v\u00fdb\u011br dat z in-memory \u00falo\u017ei\u0161t\u011b.<\/p>\n<p>Vybavuje se ot\u00e1zka, jak se v tomto \u00falo\u017ei\u0161ti aktualizuj\u00ed informace. <\/p>\n<p>Za\u010dneme t\u00edm, \u017ee to je prost\u011b sada ConcurrentHashMap, p\u0159izp\u016fsoben\u00fdch pro konkr\u00e9tn\u00ed v\u00fdb\u011bry. <br \/>\nPro jejich aktualizaci se pou\u017e\u00edv\u00e1 metoda:<\/p>\n<pre><code class=\"java\">    @EventHandler\n    public void on(CreatedTradeEvent event) {\n        log.info(\"event:{}\", event);\n\n        var trade = Trade.builder()\n\t...\n                .build();\n        trades.put(event.tradeId(), trade);\n        position.merge(event.shortName(), event.size(),\n                (oldValue, value) -&gt; event.side() == Side.BUY ? oldValue + value : oldValue - value);\n    }<\/code><\/pre>\n<p>\nZpracov\u00e1v\u00e1 ud\u00e1lost \u201eobchod vytvo\u0159en\u201c a aktualizuje Mapy.<\/p>\n<p>To jsou hlavn\u00ed body v\u00fdvoje mikroslu\u017eeb.<\/p>\n<p><i>Co lze \u0159\u00edci o nev\u00fdhod\u00e1ch Axonu?<\/i><\/p>\n<p>Za prv\u00e9, komplikuje se infrastruktura, vznik\u00e1 bod selh\u00e1n\u00ed \u2013 Axon server, ve\u0161ker\u00e1 komunikace prob\u00edh\u00e1 p\u0159es n\u011bj. <\/p>\n<p>Za druh\u00e9, v\u00fdrazn\u011b se projevuje nev\u00fdhoda podobn\u00fdch distribuovan\u00fdch syst\u00e9m\u016f \u2013 do\u010dasn\u00e1 nekonzistentnost dat. V na\u0161em p\u0159\u00edpad\u011b m\u016f\u017ee mezi z\u00edsk\u00e1n\u00edm nov\u00e9 smlouvy a aktualizac\u00ed dat pro v\u00fdb\u011bry uplynout nep\u0159ijateln\u011b dlouh\u00e1 doba.<\/p>\n<p><i>Co z\u016fstalo za oponou?<\/i><\/p>\n<p>O Event Sourcing a CQRS nebylo v\u016fbec \u0159e\u010deno, co to je a k \u010demu je to pot\u0159eba.<br \/>\nBez vysv\u011btlen\u00ed t\u011bchto pojm\u016f mohlo n\u011bkolik bod\u016f z\u016fstat nejasn\u00fdch.<\/p>\n<p>Mo\u017en\u00e1 n\u011bkter\u00e9 fragmenty k\u00f3du tak\u00e9 vy\u017eaduj\u00ed vysv\u011btlen\u00ed.<\/p>\n<p>O tom si promluv\u00edme na <noindex><a rel=\"nofollow\" href=\"https:\/\/otus.pw\/WrwW\/\">otev\u0159en\u00e9m webin\u00e1\u0159i<\/a><\/noindex> 21. z\u00e1\u0159\u00ed.<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/petrelevich\/jvm-digging\/tree\/master\/eventSourcing\/axonTrader\">\u00dapln\u00fd p\u0159\u00edklad<\/a><\/noindex>.<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/otus\/blog\/519144\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u044d\u0442\u043e\u043c \u043f\u0440\u043e\u0441\u0442\u043e\u043c \u0442\u0443\u0442\u043e\u0440\u0438\u0430\u043b\u0435 \u043c\u044b \u0441\u0434\u0435\u043b\u0430\u0435\u043c \u043f\u0430\u0440\u0443 \u043c\u0438\u043a\u0440\u043e\u0441\u0435\u0440\u0432\u0438\u0441\u043e\u0432 \u043d\u0430 Spring Boot \u0438 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0443\u0435\u043c \u043c\u0435\u0436\u0434\u0443 \u043d\u0438\u043c\u0438 \u0432\u0437\u0430\u0438\u043c\u043e\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0435 \u0447\u0435\u0440\u0435\u0437 \u0444\u0440\u0435\u0439\u043c\u0432\u043e\u0440\u043a Axon. \u0414\u043e\u043f\u0443\u0441\u0442\u0438\u043c \u0443 \u043d\u0430\u0441 \u0442\u0430\u043a\u0430\u044f \u0437\u0430\u0434\u0430\u0447\u0430. \u0415\u0441\u0442\u044c \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a \u0441\u0434\u0435\u043b\u043e\u043a \u043d\u0430 \u0444\u043e\u043d\u0434\u043e\u0432\u043e\u043c \u0440\u044b\u043d\u043a\u0435. \u042d\u0442\u043e\u0442 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a \u043f\u0435\u0440\u0435\u0434\u0430\u0435\u0442 \u043d\u0430\u043c \u0441\u0434\u0435\u043b\u043a\u0438 \u043f\u043e Rest-\u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u0443. \u041d\u0430\u043c \u043d\u0430\u0434\u043e \u044d\u0442\u0438 \u0441\u0434\u0435\u043b\u043a\u0438 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c, \u0441\u043e\u0445\u0440\u0430\u043d\u0438\u0442\u044c \u0432 \u0431\u0430\u0437\u0443 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438 \u0441\u0434\u0435\u043b\u0430\u0442\u044c \u0443\u0434\u043e\u0431\u043d\u043e\u0435 in-memory \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435. \u042d\u0442\u043e \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u0434\u043e\u043b\u0436\u043d\u044b \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u044c [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":94394,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-94393","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=\"\u0412 \u044d\u0442\u043e\u043c \u043f\u0440\u043e\u0441\u0442\u043e\u043c \u0442\u0443\u0442\u043e\u0440\u0438\u0430\u043b\u0435 \u043c\u044b \u0441\u0434\u0435\u043b\u0430\u0435\u043c \u043f\u0430\u0440\u0443 \u043c\u0438\u043a\u0440\u043e\u0441\u0435\u0440\u0432\u0438\u0441\u043e\u0432 \u043d\u0430 Spring Boot \u0438 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0443\u0435\u043c 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