{"id":90484,"date":"2020-08-01T13:42:39","date_gmt":"2020-08-01T11:42:39","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-jpype-1-0-2-biblioteki-dlya-dostupa-k-java-klassam-iz-python"},"modified":"2020-08-01T13:42:39","modified_gmt":"2020-08-01T11:42:39","slug":"obnovlenie-jpype-1-0-2-biblioteki-dlya-dostupa-k-java-klassam-iz-python","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/obnovlenie-jpype-1-0-2-biblioteki-dlya-dostupa-k-java-klassam-iz-python","title":{"rendered":"\u00d6t h\u00f3napos fejleszt\u00e9s ut\u00e1n bemutat\u00e1sra ker\u00fclt a rendszerkezel\u0151 kiad\u00e1sa.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/releases\/tag\/1.0.2\">El\u00e9rhet\u0151<\/a><\/noindex> \u00faj r\u00e9tegez\u00e9si kiad\u00e1s <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/\">JPype 1.0.2<\/a><\/noindex>, amely teljes hozz\u00e1f\u00e9r\u00e9st biztos\u00edt a Python-alkalmaz\u00e1sok sz\u00e1m\u00e1ra a Java nyelv\u0171 oszt\u00e1lyk\u00f6nyvt\u00e1rakhoz. A JPype seg\u00edts\u00e9g\u00e9vel a Pythonb\u00f3l haszn\u00e1lhat\u00f3k a Java-specifikus k\u00f6nyvt\u00e1rak, hibrid alkalmaz\u00e1sok l\u00e9trehozva, amelyek kombin\u00e1lj\u00e1k a Java \u00e9s a Python k\u00f3dot. A Jythont\u00f3l elt\u00e9r\u0151en a Java integr\u00e1ci\u00f3 nem a JVM-hez k\u00e9sz\u00fclt Python verzi\u00f3 l\u00e9trehoz\u00e1s\u00e1val \u00e9rhet\u0151 el, hanem a k\u00e9t virtu\u00e1lis g\u00e9p k\u00f6z\u00f6tti interakci\u00f3 r\u00e9v\u00e9n, megosztott mem\u00f3ri\u00e1t haszn\u00e1lva. Ez a megk\u00f6zel\u00edt\u00e9s nemcsak j\u00f3 teljes\u00edtm\u00e9nyt ny\u00fajt, hanem hozz\u00e1f\u00e9r\u00e9st biztos\u00edt az \u00f6sszes CPython \u00e9s Java k\u00f6nyvt\u00e1rhoz is. A projekt k\u00f3dja <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jpype-project\/jpype\/\">terjeszt\u00e9sre ker\u00fcl<\/a><\/noindex> Apache 2.0 licenc alatt.<\/p>\n<p>F\u0151bb v\u00e1ltoz\u00e1sok:<\/p>\n<ul>\n<li class=\"l\"> A met\u00f3dush\u00edv\u00e1sokhoz cache ker\u00fclt hozz\u00e1ad\u00e1sra, amely megakad\u00e1lyozza a t\u00falterhel\u00e9sek felold\u00e1s\u00e1t, \u00edgy jelent\u0151sen cs\u00f6kkenti a met\u00f3dusok felold\u00e1s\u00e1nak teljes\u00edtm\u00e9nyhat\u00e1s\u00e1t, k\u00fcl\u00f6n\u00f6sen, ha ugyanazt a t\u00falterhel\u00e9st t\u00f6bbsz\u00f6r h\u00edvj\u00e1k meg, p\u00e9ld\u00e1ul ciklusok v\u00e9grehajt\u00e1sa k\u00f6zben.\n<li class=\"l\"> A list\u00e1k, tuple-\u00f6k \u00e9s pufferek Java primit\u00edv t\u00f6mb\u00f6kbe val\u00f3 \u00e1tvitel\u00e9nek sebess\u00e9ge 4 \u00e9s 100-szor k\u00f6z\u00f6tt v\u00e1ltozik, az adatok t\u00edpus\u00e1t\u00f3l f\u00fcgg\u0151en. A konvert\u00e1l\u00e1s optimaliz\u00e1lt pufferekkel t\u00f6rt\u00e9nik a mem\u00f3ri\u00e1ban, a Sequence API helyett. Amikor Python-pufferrel tal\u00e1lkozunk, csak az els\u0151 elemet ellen\u0151rizz\u00fck konvert\u00e1l\u00e1sra, mivel az adatok pufferei homog\u00e9nok.\n<li class=\"l\"> A le\u00e1ll\u00edt\u00e1si m\u0171veletek kezel\u00e9se (m\u00e1r a JPype 1.0.0-ban megval\u00f3s\u00edtva, de a v\u00e1ltoztat\u00e1sok list\u00e1j\u00e1nak elk\u00e9sz\u00edt\u00e9sekor kimaradt). A JPype mostant\u00f3l megh\u00edvja a JVM le\u00e1ll\u00edt\u00f3 elj\u00e1r\u00e1s\u00e1t, amely megpr\u00f3b\u00e1l \u201ekellemesen\u201d kil\u00e9pni. Ez t\u00f6bb viselked\u00e9sv\u00e1ltoz\u00e1st eredm\u00e9nyez. A h\u00e1tt\u00e9rsz\u00e1lak (proxy h\u00edv\u00e1sok) mostant\u00f3l meg tudj\u00e1k tartani a JVM-et nyitva, am\u00edg le nem z\u00e1rulnak. A Proxy h\u00edv\u00e1sok a le\u00e1ll\u00edt\u00e1st kezelik, am\u00edg a h\u00edv\u00e1s be nem fejez\u0151dik, de megszak\u00edt\u00e1si \u00fczenetet kapnak. A f\u00e1jlok mostant\u00f3l megfelel\u0151en z\u00e1r\u00f3dnak \u00e9s adatokat \u00edrnak ki a lemezre (flush), amennyiben a sz\u00e1lak megfelel\u0151en kezelik a kiv\u00e9teleket. Er\u0151forr\u00e1s-tiszt\u00edt\u00e1si hookok \u00e9s finalizerek ker\u00fclnek v\u00e9grehajt\u00e1sra. Sz\u00e1lak l\u00e9trehoz\u00e1sakor AtExit hookok h\u00edv\u00f3dnak meg. A d\u00e9monon kereszt\u00fcl automatikusan csatlakoztatja a sz\u00e1lakat a JVM Pythonb\u00f3l val\u00f3 haszn\u00e1latakor. A hibak\u00f3d, amely nem tudja megfelel\u0151en kezelni a sz\u00e1l tiszt\u00edt\u00e1s\u00e1t, val\u00f3sz\u00edn\u0171leg felf\u00fcggeszt\u00e9sre ker\u00fcl a le\u00e1ll\u00edt\u00e1s sor\u00e1n. Tov\u00e1bbi dokument\u00e1ci\u00f3 tal\u00e1lhat\u00f3 a felhaszn\u00e1l\u00f3i k\u00e9zik\u00f6nyvben.\n<li class=\"l\"> A Throwable k\u00f6rnyezetbe val\u00f3 beilleszt\u00e9se Object k\u00f6rnyezetbe ment, a v\u00e1rhat\u00f3 eredm\u00e9ny helyett, ami furcsa konverzi\u00f3kat okozott a Python oszt\u00e1lyokb\u00f3l.\n<li class=\"l\"> Kijav\u00edtott\u00e1k a bet\u0171t\u00edpusokat az import\u00e1l\u00f3 rendszerben, amelyek hib\u00e1t eredm\u00e9nyeztek: 'jname not found'.\n<li class=\"l\"> Biztos\u00edtott\u00e1k a KeyboardInterrupt megfelel\u0151 el\u0151rehalad\u00e1s\u00e1t a '^C' karakteren.\n<li class=\"l\"> A Python 3.5.3-mal kapcsolatos karakterek probl\u00e9m\u00e1ja megoldva. A PySlice_Unpack a k\u00f6vetkez\u0151 patch-kibocs\u00e1t\u00e1skor (3.5.4) ker\u00fclt bevezet\u00e9sre, \u00e9s nem lett volna szabad haszn\u00e1lni.\n<li class=\"l\"> Megoldott\u00e1k a numpy.linalg.inv-vel kapcsolatos hib\u00e1t, amely \u00f6sszeoml\u00e1shoz vezetett. A probl\u00e9ma a JVM \u00e9s bizonyos numpy verzi\u00f3k k\u00f6z\u00f6tti sz\u00e1linterakci\u00f3ra vezethet\u0151 vissza. Javasolt megold\u00e1s - a numpy.linalg.inv h\u00edv\u00e1sa a JVM ind\u00edt\u00e1sa el\u0151tt.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Forr\u00e1s: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53469\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043d\u043e\u0432\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0441\u043b\u043e\u0439\u043a\u0438 JPype 1.0.2, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u043e\u043b\u043d\u044b\u0439 \u0434\u043e\u0441\u0442\u0443\u043f Python-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043a \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430\u043c \u043a\u043b\u0430\u0441\u0441\u043e\u0432 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 Java. \u041f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 JPype \u0438\u0437 Python \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u0447\u043d\u044b\u0435 \u0434\u043b\u044f Java \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438, \u0441\u043e\u0437\u0434\u0430\u0432\u0430\u044f \u0433\u0438\u0431\u0440\u0438\u0434\u043d\u044b\u0435 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f, \u0441\u043e\u0447\u0435\u0442\u0430\u044e\u0449\u0438\u0435 \u043a\u043e\u0434 \u043d\u0430 Java \u0438 Python. \u0412 \u043e\u0442\u043b\u0438\u0447\u0438\u0435 \u043e\u0442 Jython, \u0438\u043d\u0442\u0435\u0433\u0440\u0430\u0446\u0438\u044f \u0441 Java \u0434\u043e\u0441\u0442\u0438\u0433\u0430\u0435\u0442\u0441\u044f \u043d\u0435 \u0447\u0435\u0440\u0435\u0437 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430 Python \u0434\u043b\u044f JVM, \u0430 \u0447\u0435\u0440\u0435\u0437 \u0432\u0437\u0430\u0438\u043c\u043e\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0435 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-90484","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043d\u043e\u0432\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0441\u043b\u043e\u0439\u043a\u0438\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" 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