{"id":478,"date":"2011-08-23T09:40:33","date_gmt":"2011-08-23T07:40:33","guid":{"rendered":"http:\/\/hen.co.za\/blog\/?p=478"},"modified":"2011-08-23T09:40:33","modified_gmt":"2011-08-23T07:40:33","slug":"waiting-for-your-exit","status":"publish","type":"post","link":"https:\/\/hen.co.za\/blog\/2011\/08\/waiting-for-your-exit\/","title":{"rendered":"Waiting for your exit"},"content":{"rendered":"

With a heading like this the post could be mistaken for something more philosophical but fortunately this is a plain developmental posting \ud83d\ude42<\/p>\n

Suppose you have some program that does some work and then have to ‘sleep’ for a while before doing some more work – like a service checking or polling stuff. You can simply use something like a Thread.Sleep() but that also means the thread cannot do or respond to anything else during that time – like the program or service stopping. That would mean the stopping process has to wait until the ‘sleeping’ thread becomes active again.<\/p>\n

A solution to this is by having a variable or property that indicates if the program or service is still running and having the ‘waiting’ routine wait in little ‘jumps’ checking the ‘IsRunning’ variable each time and then waiting a little bit more until the full ‘sleeping’ period time is done.<\/p>\n

\n
private\u00a0void<\/span>\u00a0BackgroundWaitIsPolling(int\u00a0<\/span>nextWaitInterval)\r\n{\r\n \u00a0 int\u00a0<\/span>waitTimeRemaining;\r\n \u00a0 int\u00a0<\/span>decrementBy\u00a0=\u00a02000;\r\n \u00a0 if\u00a0<\/span>(IsRunning)\r\n\u00a0\u00a0 {\r\n \u00a0 \u00a0\u00a0\u00a0\u00a0try<\/span>\r\n \u00a0 \u00a0\u00a0\u00a0\u00a0{\r\n \u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0((nextWaitInterval\u00a0<=\u00a0decrementBy)\u00a0&&\u00a0(nextWaitInterval\u00a0>\u00a00))\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {\r\n  \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Thread.Sleep(nextWaitInterval);\r\n\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 else<\/span>\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {\r\n \u00a0             waitTimeRemaining\u00a0=\u00a0nextWaitInterval;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  while\u00a0<\/span>(IsRunning &&\u00a0(waitTimeRemaining\u00a0>\u00a00))\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0 if\u00a0<\/span>(waitTimeRemaining\u00a0<=\u00a0decrementBy)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0    waitTimeRemaining\u00a0=\u00a00;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 else<\/span>\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 waitTimeRemaining\u00a0-=\u00a0decrementBy;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if\u00a0<\/span>(decrementBy\u00a0>\u00a00)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Thread.Sleep(decrementBy);\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  }\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 catch\u00a0<\/span>{\u00a0}\r\n \u00a0 }\r\n}<\/pre>\n<\/blockquote>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
With a heading like this the post could be mistaken for something more philosophical but fortunately this is a plain developmental posting \ud83d\ude42 Suppose you have some program that does some work and then have to ‘sleep’ for a while …<\/p>\n
Read more »<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[7,8,9,5,303,24],"class_list":["post-478","post","type-post","status-publish","format-standard","hentry","category-development","tag-net","tag-c","tag-code","tag-code-sharing","tag-development","tag-tip"],"_links":{"self":[{"href":"https:\/\/hen.co.za\/blog\/wp-json\/wp\/v2\/posts\/478","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hen.co.za\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hen.co.za\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hen.co.za\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hen.co.za\/blog\/wp-json\/wp\/v2\/comments?post=478"}],"version-history":[{"count":3,"href":"https:\/\/hen.co.za\/blog\/wp-json\/wp\/v2\/posts\/478\/revisions"}],"predecessor-version":[{"id":481,"href":"https:\/\/hen.co.za\/blog\/wp-json\/wp\/v2\/posts\/478\/revisions\/481"}],"wp:attachment":[{"href":"https:\/\/hen.co.za\/blog\/wp-json\/wp\/v2\/media?parent=478"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hen.co.za\/blog\/wp-json\/wp\/v2\/categories?post=478"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hen.co.za\/blog\/wp-json\/wp\/v2\/tags?post=478"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}