{"id":17496,"date":"2020-08-25T06:46:45","date_gmt":"2020-08-25T06:46:45","guid":{"rendered":"https:\/\/www.gencayyildiz.com\/blog\/?p=17496"},"modified":"2020-08-25T06:46:45","modified_gmt":"2020-08-25T06:46:45","slug":"azure-functions-serisi-16-timer-trigger","status":"publish","type":"post","link":"https:\/\/www.gencayyildiz.com\/blog\/azure-functions-serisi-16-timer-trigger\/","title":{"rendered":"Azure Functions Serisi #16 – Timer Trigger"},"content":{"rendered":"

<\/div>\n

Merhaba,<\/p>\n

Bu i\u00e7eri\u011fimizde Azure Functions yaz\u0131 serisi<\/a>nin onalt\u0131nc\u0131 makalesi olan Timer Trigger konusunu inceleyece\u011fiz.<\/p>\n

Timer Trigger Nedir?<\/h4>\n
Timer Trigger, belirli periyotlarda yap\u0131lacak i\u015flemler neticesinde kullan\u0131lan fonksiyon \u00e7e\u015fididir. \u00d6rne\u011fin; uygulaman\u0131zda ki \u00fcyelere periyodik olarak haftal\u0131k i\u00e7erik b\u00fclteni g\u00f6ndermek ya da her ay kullan\u0131c\u0131lar\u0131n aktiflik durumunu kontrol ederek herhangi bir aktivasyon g\u00f6stermeyenlere mail g\u00f6ndermek istedi\u011finiz durumlarda Timer Trigger’\u0131 kullanabilirsiniz.<\/p>\n
Timer Trigger Nas\u0131l \u00c7al\u0131\u015fmaktad\u0131r?<\/h4>\n
Timer Trigger’\u0131n \u00e7al\u0131\u015fabilmesi i\u00e7in kendisine verilen ve \u00e7al\u0131\u015fma periyodunu ifade eden NCRON Expression<\/em> de\u011feri kullan\u0131lmaktad\u0131r. NCRON, CRON de\u011ferinin bir g\u00f6mlek geli\u015fmi\u015f versiyonudur. \u015eimdi ilk olarak CRON’u ard\u0131ndan onun bilgisi \u0131\u015f\u0131\u011f\u0131nda NCRON’u masaya yat\u0131ral\u0131m…<\/p>\n
CRON Nedir?<\/strong>
\nLinux i\u015fletim sistemlerinde periyodik \u00e7al\u0131\u015fmalar\u0131 tarif eden ve b\u00f6ylece i\u015flevsel olarak zamana dayal\u0131 g\u00f6rev tan\u0131mlamam\u0131z\u0131 sa\u011flayan yap\u0131sal ifadedir.<\/p>\n
Bir CRON \u00f6rne\u011fi fiziksel olarak a\u015fa\u011f\u0131daki gibidir;<\/p>\n
\n# \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 dakika (0 – 59)<\/span>
\n# \u2502 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 saat (0 – 23)<\/span>
\n# \u2502 \u2502 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 ay\u0131n g\u00fcn\u00fc (1 – 31)<\/span>
\n# \u2502 \u2502 \u2502 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 ay (1 – 12)<\/span>
\n# \u2502 \u2502 \u2502 \u2502 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 haftan\u0131n g\u00fcn\u00fc (0 – 6) (Pazar’dan Cumartesiye kadar)<\/span>
\n# \u2502 \u2502 \u2502 \u2502 \u2502
\n# \u2502 \u2502 \u2502 \u2502 \u2502
\n# \u2502 \u2502 \u2502 \u2502 \u2502
\n# * * * * <\/span>\n<\/div>\n
Her bir y\u0131ld\u0131z() karakteri kendisine kar\u015f\u0131l\u0131k gelen zamansal ifadenin say\u0131sal bildirimini bar\u0131nd\u0131rmaktad\u0131r.<\/p>\n
Hasbel kader pratik olmas\u0131 amac\u0131yla a\u015fa\u011f\u0131daki \u00f6rnekleri inceleyiniz;<\/p>\n
\n
‘1 12 7 3 2’ ifadesi; Mart ay\u0131n\u0131n 7. g\u00fcn\u00fcn\u00fcn saat 12:01’ini ve Sal\u0131 g\u00fcn\u00fcn\u00fc ifade eder.<\/em><\/li>\n
‘5 21 9 2 5’ ifadesi; \u015eubat ay\u0131n\u0131n 9. g\u00fcn\u00fcn\u00fcn saat 21:05’ini ve Cuma g\u00fcn\u00fcn\u00fc ifade eder.<\/em><\/li>\n
‘5 5 5 5 5’ ifadesi; May\u0131s ay\u0131n\u0131n 5. g\u00fcn\u00fcn\u00fcn saat 05:05’ini ve Cuma g\u00fcn\u00fcn\u00fc ifade eder.<\/em><\/li>\n<\/ul>\n
(y\u0131ld\u0131z) karakteri ilgili zamansal ifadenin herhangi bir de\u011ferine kar\u015f\u0131l\u0131k gelmektedir;<\/p>\n
\n
‘0 22 * * 5’ ifadesi; her Cuma g\u00fcn\u00fcn\u00fcn saat 22:00’\u0131n\u0131 ifade eder.<\/em><\/li>\n*
‘ * * * 5’ ifadesi; her Cuma g\u00fcn\u00fcn\u00fcn her dakikas\u0131n\u0131 ifade eder.<\/em><\/li>\n*
’11 2 3 4 ’ ifadesi; Nisan ay\u0131n\u0131n 3. g\u00fcn\u00fcn\u00fcn saat 02:11’ini ifade eder.<\/em><\/li>\n*
‘* * * * ’ ifadesi; herhangi bir dakikay\u0131<\/em> ifade eder.<\/em><\/li>\n<\/ul>\n
\/ karakteri ilgili zamansal ifadenin periyotsal de\u011ferine kar\u015f\u0131l\u0131k gelmektedir;<\/p>\n
\n
‘\/12 3 3 3 3’ ifadesi; 3. ay\u0131n 3. ve \u00c7ar\u015famba g\u00fcnlerinde 3. saatin her 12 dakikada birini ifade eder.<\/em><\/li>\n
‘* * * \/3 ’ ifadesi; her 3 ayda bir dakikay\u0131 ifade eder.<\/em><\/li>\n<\/ul>\n
– karakteri ilgili zamansal ifadenin aral\u0131ksal de\u011ferine kar\u015f\u0131l\u0131k gelmektedir;<\/p>\n
\n
‘1-10 * \/3 ’ ifadesi; her 3 ayda bir, 1’den 10’a kadar olan her dakikay\u0131 ifade eder.<\/em><\/li>\n*
‘1-10 * 5-7 \/3 ’ ifadesi; her 3 ayda bir, ay\u0131n 5. g\u00fcn\u00fcnden 7. g\u00fcn\u00fc aras\u0131nda 1’den 10’a kadar olan her dakikay\u0131 ifade eder.<\/em><\/li>\n<\/ul>\n
CRON hesaplamas\u0131n\u0131 daha net yapabilmek i\u00e7in crontab.guru<\/a> adresindeki uygulamay\u0131 kullanabilirsiniz.<\/em><\/p><\/blockquote>\n
NCRON Nedir?<\/strong>
\nNCRON, CRON de\u011ferinin saniye kat\u0131lm\u0131\u015f halidir.<\/p>\n
\n# \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 saniye (0 – 59)<\/span>
\n# \u2502 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 dakika (0 – 59)<\/span>
\n# \u2502 \u2502 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 saat (0 – 23)<\/span>
\n# \u2502 \u2502 \u2502 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 ay\u0131n g\u00fcn\u00fc (1 – 31)<\/span>
\n# \u2502 \u2502 \u2502 \u2502 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 ay (1 – 12)<\/span>
\n# \u2502 \u2502 \u2502 \u2502 \u2502 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 haftan\u0131n g\u00fcn\u00fc (0 – 6) (Pazar’dan Cumartesiye kadar)<\/span>
\n# \u2502 \u2502 \u2502 \u2502 \u2502 \u2502
\n# \u2502 \u2502 \u2502 \u2502 \u2502 \u2502
\n# \u2502 \u2502 \u2502 \u2502 \u2502 \u2502
\n# * * * * * <\/span>\n<\/div>\n
Azure servisleri zamanlanm\u0131\u015f g\u00f6revlerde NCRON’u benimsemi\u015ftir.<\/p>\n
Timer Trigger Olu\u015fturma<\/h4>\n
Timer Trigger, Visual Studio \u00fczerinden basit\u00e7e olu\u015fturulabilmektedir.
\n $\"Azure$ <\/a>
\nSa\u011f taraftaki ‘Schedule’ alan\u0131na dikkat ederseniz, zamanlay\u0131c\u0131n\u0131n default program\u0131n\u0131 g\u00f6receksiniz. \u0130stedi\u011finiz gibi m\u00fcdahale edebilir, de\u011fi\u015ftirebilirsiniz.
\n $\"Azure$ <\/a>
\nUygulamada direkt kar\u015f\u0131m\u0131za gelen function’\u0131 da incelersek e\u011fer ‘TimerTrigger’ attribute’u ile i\u015faretlenmi\u015f ‘TimerInfo’ t\u00fcr\u00fcnden parametreden olu\u015fmaktad\u0131r. \u0130\u015fte bu da ilgili trigger’\u0131 Timer Trigger olarak ayarlayan noktad\u0131r. Default olarak gelen ‘0 \/5 * * * ’ de\u011ferinden de anla\u015f\u0131lan her 5 dakikada bir tetiklenecek olmas\u0131d\u0131r.<\/p>\n
\u0130lgili function’\u0131 hi\u00e7 oynamadan direkt olarak derleyip \u00e7al\u0131\u015ft\u0131rd\u0131\u011f\u0131n\u0131zda her 5 dakikada bir tetiklendi\u011fini g\u00f6receksiniz. Bizler s\u00fcreci h\u0131zland\u0131rmak i\u00e7in NCRON de\u011ferini her 1 saniyede bir tetiklenecek \u015fekilde(\/1 * * * * )<\/span> de\u011fi\u015ftirip derledi\u011fimizde a\u015fa\u011f\u0131daki sonu\u00e7la kar\u015f\u0131la\u015fmaktay\u0131z.
\n $\"Azure$ <\/a><\/p>\n
\u0130\u015fte bu kadar basit…<\/p>\n
Output Blob Binding<\/h4>\n
\u015eimdi Timer Trigger kullanarak Output Blob Binding i\u015flemini ele alan bir \u00f6rnek tasarlayal\u0131m. Bunun i\u00e7in \u00f6ncelikle Microsoft.Azure.WebJobs.Extensions.Storage<\/a> k\u00fct\u00fcphanesinin uygulamaya y\u00fcklenmesi gerekmektedir.<\/p>\n
\r\n public static class Function1\r\n {\r\n [FunctionName("Function1")]\r\n public async static Task Run([TimerTrigger("\/1 * * * * *")] TimerInfo myTimer, ILogger log,\r\n [Blob("logs\/veri.txt", System.IO.FileAccess.Write, Connection = "StorageConnectionString")] Stream blobStream)\r\n {\r\n string text = $"Timer Trigger tetiklenmi\u015ftir. {DateTime.Now}";\r\n byte[] buffer = Encoding.ASCII.GetBytes(text);\r\n await blobStream.WriteAsync(buffer, 0, buffer.Length);\r\n blobStream.Close();\r\n await blobStream.DisposeAsync();\r\n }\r\n }\r\n<\/pre>\n
Yukar\u0131daki kod blo\u011funu incelerseniz e\u011fer; bir Output Blob Binding i\u015flemi ger\u00e7ekle\u015ftirilmekte ve ‘logs’ isimli container i\u00e7erisinde ‘veri.txt’ dosyas\u0131 olu\u015fturularak(yoksa) i\u00e7erisine gerekli log at\u0131lmaktad\u0131r.<\/p>\n
Bu \u015fekilde uygulamay\u0131 derleyip, \u00e7al\u0131\u015ft\u0131rd\u0131\u011f\u0131n\u0131zda ‘veri.txt’ dosyas\u0131n\u0131n olu\u015fturuldu\u011funu ve i\u00e7erisine a\u015fa\u011f\u0131daki gibi logun at\u0131ld\u0131\u011f\u0131n\u0131 g\u00f6receksiniz.
\n $\"Azure$ <\/a><\/p>\n
\u0130sterseniz timer trigger tetiklendik\u00e7e container i\u00e7erisine o an\u0131n tarih bilgisini isim olarak alan dosyalar olu\u015fturarak i\u00e7lerine ayr\u0131 ayr\u0131 loglamay\u0131 yapabilirsiniz. Bunun i\u00e7in ‘Blob’ attribute’unda ‘blobPath’ de\u011ferini a\u015fa\u011f\u0131daki gibi tan\u0131mlaman\u0131z gerekmektedir.<\/p>\n
`logs\/{DateTime}.txt<\/strong><\/code><\/div>\n`<\/a> \nYa da a\u015fa\u011f\u0131daki gibi bir tan\u0131mlamayla random isimde dosyalar olu\u015fturarak loglamalar ger\u00e7ekle\u015ftirilebilir.<\/p>\n logs\/{rand-guid}.txt<\/strong><\/code><\/div>\n<\/a><\/p>\n \u0130lgilenenlerin faydalanmas\u0131 dile\u011fiyle… \nSonraki yaz\u0131lar\u0131mda g\u00f6r\u00fc\u015fmek \u00fczere… \n\u0130yi \u00e7al\u0131\u015fmalar…<\/p>\n","protected":false},"excerpt":{"rendered":" Merhaba, Bu i\u00e7eri\u011fimizde Azure Functions yaz\u0131 serisinin onalt\u0131nc\u0131 makalesi olan Timer Trigger konusunu inceleyece\u011fiz. Timer Trigger Nedir? Timer Trigger, belirli periyotlarda yap\u0131lacak i\u015flemler neticesinde kullan\u0131lan fonksiyon \u00e7e\u015fididir. \u00d6rne\u011fin; uygulaman\u0131zda ki \u00fcyelere periyodik olarak haftal\u0131k...<\/p>\n","protected":false},"author":1,"featured_media":17011,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3121],"tags":[3694,3661,3749,3750,3751,3754,3748,3747,3752,3753,3693],"class_list":["post-17496","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-azure","tag-azure-function-timer-trigger","tag-azure-functions","tag-cron","tag-cron-expression","tag-cron-nedir","tag-microsoft-azure-webjobs-extensions-storage","tag-ncron","tag-ncron-expression","tag-ncron-nedir","tag-output-blob-binding","tag-timer-trigger"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts\/17496","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/comments?post=17496"}],"version-history":[{"count":72,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts\/17496\/revisions"}],"predecessor-version":[{"id":17576,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts\/17496\/revisions\/17576"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/media\/17011"}],"wp:attachment":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/media?parent=17496"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/categories?post=17496"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/tags?post=17496"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}