async builder<\/strong><\/p>\n\n\n\n\ucf54\ub8e8\ud2f4\uc744 \ub9cc\ub4e4\uace0 Deffered\uc758 \uad6c\ud604\uc73c\ub85c \ud574\ub2f9 \uacb0\uacfc\ub97c \ubc18\ud658\ud55c\ub2e4. \uc2e4\ud589 \uc911\uc778 \ucf54\ub8e8\ud2f4\uc740 deferred\uc758 \uacb0\uacfc\uac00 \ucde8\uc18c\ub418\uba74 \ucde8\uc18c\ub41c\ub2e4. \uacb0\uacfc \ucf54\ub8e8\ud2f4\uc740 \ub2e4\ub978 \uc5b8\uc5b4 \ubc0f \ud504\ub808\uc784\uc6cc\ud06c\uc758 \uc720\uc0ac\ud55c \uae30\ucd08 \uc694\uc18c\uc640 \ube44\uad50\ud558\uc5ec \uc911\uc694\ud55c \ucc28\uc774\uc810\uc774 \uc788\ub2e4. \uad6c\uc870\ud654 \ub41c \ub3d9\uc2dc\uc131 \ud328\ub7ec\ub2e4\uc784\uc744 \uc2dc\ud589\ud558\uc9c0 \ubabb\ud558\uba74 \uc0c1\uc704 \uc791\uc5c5\uc744 \ucde8\uc18c\ud55c\ub2e4. \ud574\ub2f9 \ub3d9\uc791\uc744 \ubcc0\uacbd\ud558\ub824\uba74 SupervisorJob \ub610\ub294 supervisorScope\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4. <\/p>\n\n\n\n
\ucf54\ub8e8\ud2f4 \ucee8\ud14d\uc2a4\ud2b8\ub294 CoroutineScope\uc5d0\uc11c \uc0c1\uc18d\ub418\uba70 context \uc778\uc790\uc640 \ud568\uaed8 \ucd94\uac00\uc801\uc778 \ucee8\ud14d\uc2a4\ud2b8\ub97c \uc9c0\uc815\ud560 \uc218 \uc788\ub2e4. \ucee8\ud14d\uc2a4\ud2b8\uc5d0 dispatcher\ub098 \ub2e4\ub978 ContinuationInterceptor\uac00 \uc5c6\uc73c\uba74 Dispatchers.Default\uac00 \uc0ac\uc6a9\ub41c\ub2e4. \ubd80\ubaa8 \uc791\uc5c5\ub3c4 CoroutineScope\uc5d0\uc11c \uc0c1\uc18d\ub418\uc9c0\ub9cc \ud574\ub2f9 \ucee8\ud14d\uc2a4\ud2b8 \uc694\uc18c\ub85c \uc624\ubc84\ub77c\uc774\ub4dc \ub420 \uc218 \uc788\ub2e4.<\/p>\n\n\n\n
launch\uc640 \ub9c8\ucc2c\uac00\uc9c0\ub85c \uae30\ubcf8\uc801\uc73c\ub85c \ucf54\ub8e8\ud2f4\uc740 \uc989\uc2dc \uc2e4\ud589\ub418\ub3c4\ub85d \uc2a4\ucf00\uc974\ub9c1\ub418\uba70, \uc2dc\uc791\uc635\uc158\uc744 \ub9e4\uac1c\ubcc0\uc218\ub85c \uc9c0\uc815\ud560 \uc218 \uc788\ub2e4. <\/p>\n\n\n\n
\ucde8\uc18c \ubc0f \ud0c0\uc784\uc544\uc6c3<\/h3>\n\n\n\n
launch \ud568\uc218\uc758 \ubc18\ud658\uc73c\ub85c \uc5bb\uc740 Job\uc5d0 \ub300\ud574 cancel() \ud568\uc218\ub97c \ud638\ucd9c\ud558\uc5ec \ucde8\uc18c\ub97c \ud560 \uc218 \uc788\ub2e4.<\/p>\n\n\n\n
fun main() = runBlocking {\n val job1 = launch {\n delay(1000L)\n println(\"1\")\n }\n\n val job2 = launch { println(\"2\") }\n val job3 = launch { println(\"3\") }\n \n delay(500L)\n job1.cancel()\n job2.cancel()<\/strong>\n}\n\/\/\uc2e4\ud589 \uacb0\uacfc\n\/\/ 2\n\/\/ 3<\/code><\/pre>\n\n\n\n\ucf54\ub8e8\ud2f4 \ub0b4\ubd80\uc5d0\uc11c \uc791\uc5c5\uc774 \ucde8\uc18c \ub418\uc5c8\ub294\uc9c0 \ud655\uc778\ud558\ub294 \ubc29\ubc95\uc740 isActive \ud50c\ub798\uadf8\ub97c \ud65c\uc6a9\ud558\ub294 \uac83\uc774\ub2e4.<\/p>\n\n\n\n
val startTime = System.currentTimeMillis()\nval job = launch(Dispatchers.Default) {\n var nextPrintTime = startTime\n while (isActive<\/strong>) { \/\/ \b\ucde8\uc18c \uc5ec\ubd80 \ud655\uc778\n if (System.currentTimeMillis() >= nextPrintTime) {\n println(\"job: I'm sleeping ${i++} ...\")\n nextPrintTime += 500L\n }\n }\n}\ndelay(1300L) \/\/ \uc791\uc5c5\uc774 \ub05d\ub0a0 \ub54c \uae4c\uc9c0 \uc870\uae08 \uae30\ub2e4\ub9bc\nprintln(\"main: I'm tired of waiting!\")\njob.cancelAndJoin()<\/strong> \/\/ \uc791\uc5c5\uc744 \ucde8\uc18c\ud558\uace0 \uc644\ub8cc\ub420 \ub54c\uae4c\uc9c0 \uae30\ub2e4\ub9b0\ub2e4.\nprintln(\"main: Now I can quit.\")\n\n\/\/ \uc2e4\ud589\uacb0\uacfc \n\/\/ job: I'm sleeping 0 ...\n\/\/ job: I'm sleeping 1 ...\n\/\/ job: I'm sleeping 2 ...\n\/\/ main: I'm tired of waiting!\n\/\/ main: Now I can quit.<\/code><\/pre>\n\n\n\nsuspend \ud568\uc218\ub4e4\uc740 JobCancellationException<\/strong>\uc774 \ubc1c\uc0dd\ud558\uae30 \ub54c\ubb38\uc5d0 \uc774\ub97c try catch \ube14\ub85d\uc73c\ub85c \uc608\uc678\ucc98\ub9ac \ud558\ub294 \ubc29\ubc95\ub3c4 \uc788\ub2e4.<\/p>\n\n\n\n\uc5b4\ub5a4 \ucf54\ub4dc\ub4e4\uc740 \ucde8\uc18c\uac00 \ubd88\uac00\ud574\uc57c\ud55c\ub2e4. \uadf8\ub7f4 \ub54c\ub294 withContext(NonCancellable)<\/strong>\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4.<\/p>\n\n\n\nfun main() = runBlocking {\n val job1 = launch {\n withContext(NonCancellable)<\/strong> {\n delay(1000)\n println(\"I survived!\")\n }\n delay(1000)\n print(\"job1: end\")\n }\n\n delay(500L)\n job1.cancel()<\/strong>\n}\n\n\/\/ \uc2e4\ud589\uacb0\uacfc\n\/\/ I survived!<\/code><\/pre>\n\n\n\n\uc77c\uc815 \uc2dc\uac04\uc774 \uc9c0\ub09c \ub2e4\uc74c \uc885\ub8cc\ud558\uace0 \uc2f6\ub2e4\uba74 withTimeout\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4.<\/p>\n\n\n\n
suspend fun doCount() = coroutineScope {\n val job1 = launch(Dispatchers.Default) {\n var i = 1\n var nextTime = System.currentTimeMillis() + 100L\n\n while (i <= 10 && isActive) {\n val currentTime = System.currentTimeMillis()\n if (currentTime >= nextTime) {\n println(i)\n nextTime = currentTime + 100L\n i++\n }\n }\n }\n}\n\nfun main() = runBlocking {\n withTimeout(500L)<\/strong> {\n doCount()\n }\n}\n\n\/\/ \uc2e4\ud589\uacb0\uacfc\n\/\/ 1\n\/\/ 2\n\/\/ 3\n\/\/ 4\n\/\/ Exception in thread \"main\" kotlinx.coroutines.TimeoutCancellationException: Timed out waiting for 500 ms<\/code><\/pre>\n\n\n\n\ucde8\uc18c\uac00 \ub418\uba74\u00a0TimeoutCancellationException<\/code>\u00a0\uc608\uc678\uac00 \ubc1c\uc0dd\ud55c\ub2e4. \ub9cc\uc57d \uc5d0\ub7ec \ud578\ub4e4\ub9c1\ud558\ub294\uac8c \uadc0\ucc2e\uace0 null\uc744 \ubc18\ud658\ud558\uc5ec \uc774\ub97c \ucc98\ub9ac\ud558\uace0 \uc2f6\ub2e4\uba74 withTimeoutOrNull<\/strong>\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4.<\/p>\n\n\n\n\bCoroutineExceptionHandler \ubc0f SupervisorJob<\/h3>\n\n\n\n
\uc608\uc678\ub97c \uac00\uc7a5 \uccb4\uacc4\uc801\uc73c\ub85c \ub2e4\ub8e8\ub294 \ubc29\ubc95\uc740 CEH (Coroutine Exception Handler, \ucf54\ub8e8\ud2f4 \uc775\uc149\uc158 \ud578\ub4e4\ub7ec)\ub97c \uc0ac\uc6a9\ud558\ub294 \uac83\uc774\ub2e4. \ucee4\uc2a4\ud140 CEH\ub97c \ub9cc\ub4e0 \ub2e4\uc74c \uc0c1\uc704 \ucf54\ub8e8\ud2f4 \ube4c\ub354\uc758 \ucee8\ud14d\uc2a4\ud2b8\uc5d0 \ub4f1\ub85d\ud558\uba74 \ud558\uc704\uc758 \ubaa8\ub4e0 \uc608\uc678\uae4c\uc9c0 \uc885\ud569\uc801\uc73c\ub85c \ud578\ub4e4\ub9c1 \uac00\ub2a5\ud558\ub2e4.<\/p>\n\n\n\n
val ceh = CoroutineExceptionHandler { coroutineContext, exception ->\n println(\"\uc5d0\ub7ec \ub0b4\uc6a9: $exception\")\n}\n\nfun main() = runBlocking<Unit> {\n val scope = CoroutineScope(Dispatchers.IO)\n val job = scope.launch (ceh<\/strong>) {\n launch { \n delay(1000L)\n println(\"Hello World\") \/\/ \uc5d0\ub7ec \ub54c\ubb38\uc5d0 \uc2e4\ud589\ub418\uc9c0 \uc54a\uc74c\n }\n launch { \n delay(500L)\n throw Exception() \/\/ \uc5d0\ub7ec \ubc1c\uc0dd\n }\n }\n job.join()\n}\n\n\/\/ \uc2e4\ud589 \uacb0\uacfc\n\/\/ \uc5d0\ub7ec \ub0b4\uc6a9: java.lang.Exception<\/code><\/pre>\n\n\n\n\ucc38\uace0\ub85c runBlocking\uc5d0\uc11c\ub294 CEH\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc5c6\ub2e4. runBlocking\uc740 \uc790\uc2dd\uc774 \uc608\uc678\ubc1c\uc0dd\uc73c\ub85c \uc778\ud574 \uc885\ub8cc\ub418\uba74 \uadf8\ub0e5 \uc885\ub8cc\ub41c\ub2e4.<\/p>\n\n\n\n
SupervisorJob\uc740 \uc608\uc678\uc5d0 \uc758\ud55c \ucde8\uc18c\ub97c \ud558\uc704 \ucf54\ub8e8\ud2f4\uc73c\ub85c \uc804\ud30c\ud55c\ub2e4. \uc704\uc758 \uc608\uc81c\uc640 \ube44\uc2b7\ud55c \ub0b4\uc6a9\uc744 SupervisorJob\uc744 \uc0ac\uc6a9\ud558\uc5ec \ub2e4\uc74c\uacfc \uac19\uc774 \uc2e4\ud589\ud574\ubcf4\uc790.<\/p>\n\n\n\n
val ceh = CoroutineExceptionHandler<\/strong> { coroutineContext, exception ->\n println(\"\uc5d0\ub7ec \ub0b4\uc6a9: $exception\")\n}\n\nfun main() = runBlocking<Unit> {\n val scope = CoroutineScope(Dispatchers.IO+ceh<\/strong>+SupervisorJob()<\/strong>)\n val job1 = scope.launch {\n delay(1000L)\n println(\"Hello World\") \/\/ \uc5d0\ub7ec\uac00 \ubc1c\uc0dd\ud574\ub3c4 \uc2e4\ud589\ub428\n }\n val job2 = scope.launch {\n delay(500L)\n throw Exception() \n }\n joinAll(job1, job2)\n}\n\n\/\/ \uc2e4\ud589 \uacb0\uacfc\n\/\/ \uc5d0\ub7ec \ub0b4\uc6a9: java.lang.Exception\n\/\/ Hello World<\/code><\/pre>\n\n\n\nCoroutineScope\uc640 SupervisorJob\uc744 \ud569\uce5c\ub4ef \ud55c SupervisorScope\uac00 \uc788\ub2e4.<\/p>\n\n\n\n
val ceh = CoroutineExceptionHandler { coroutineContext, exception ->\n println(\"\uc5d0\ub7ec \ub0b4\uc6a9: $exception\")\n}\n\nfun main() = runBlocking<Unit> {\n\tval scope = CoroutineScope(ceh)\n val job = scope.launch{\n supervisorScope<\/strong> {\n launch {\n delay(1000L)\n println(\"Hello World\") \n }\n launch {\n delay(500L)\n throw Exception() \n }\n }\n }\n job.join()\n}\n\/\/ \uc2e4\ud589\uacb0\uacfc \n\/\/ \uc5d0\ub7ec \ub0b4\uc6a9: java.lang.Exception\n\/\/ Hello World<\/code><\/pre>\n\n\n\nsupervisorScope\ub97c \uc0ac\uc6a9\ud560 \ub54c \uc8fc\uc758\ud560 \uc810\uc740 \ubb34\uc870\uac74 \uc790\uc2dd \uc218\uc900\uc5d0\uc11c \uc608\uc678\ub97c \ud578\ub4e4\ub9c1 \ud574\uc57c\ud55c\ub2e4\ub294 \uac83\uc774\ub2e4. \uc790\uc2dd\uc758 \uc2e4\ud328\uac00 \ubd80\ubaa8\uc5d0\uac8c \uc804\ub2ec\ub418\uc9c0 \uc54a\uae30 \ub54c\ubb38\uc5d0 \uc790\uc2dd \uc218\uc900\uc5d0\uc11c \uc608\uc678\ub97c \ucc98\ub9ac\ud574\uc57c \ud558\ub294 \uac83\uc744 \uba85\uc2ec\ud558\uc790.<\/p>\n\n\n\n
actor<\/h3>\n\n\n\n
\uc561\ud130\ub294 1973\ub144\uc5d0 \uce7c \ud734\uc774\ud2b8\uac00 \ub9cc\ub4e0 \uac1c\ub150\uc73c\ub85c \uc561\ud130\uac00 \ub3c5\uc810\uc801\uc73c\ub85c \uc790\ub8cc\ub97c \uac16\uace0, \uadf8 \uc790\ub8cc\ub97c \ub2e4\ub978 \ucf54\ub8e8\ud2f4\uacfc \uacf5\uc720\ud558\uc9c0 \uc54a\uace0 \uc561\ud130\ub97c \ud1b5\ud574\uc11c\ub9cc \uc811\uadfc\ud558\uac8c \ub9cc\ub4e0\ub2e4. <\/p>\n\n\n\n
sealed class CounterMsg\nobject IncCounter : CounterMsg()\nclass GetCounter(val response: CompletableDeferred<Int>) : CounterMsg()\n\nfun main() = runBlocking<Unit> {\n val counter = counterActor() \/\/ CounterMsg\ub9cc \ub2e4\ub8e8\ub294 \uc561\ud130 \uc0dd\uc131\n withContext(Dispatchers.Default) {\n massiveRun { \/\/ IntCounter\ub97c 100*1000 (10\ub9cc\ubc88) \uc804\uc1a1\n counter.send(IncCounter) \n }\n }\n\n val response = CompletableDeferred<Int>() \/\/ \uacb0\uacfc\ub97c \uc804\ub2ec \ubc1b\uae30 \uc704\ud55c CompletableDeffered\n counter.send(GetCounter(response)) \/\/ response\ub97c \uc804\ub2ec\ud558\uace0,\n println(\"Counter = ${response.await()}\") \/\/ await()\ud558\uba74 \uacb0\uacfc\ub97c \ubc18\ud658\ud574\uc900\ub2e4. \n counter.close()\n}\n\n\/\/ \ub300\ub7c9 \uc2e4\ud589 \uc791\uc5c5 (10\ub9cc\ubc88 \ubc18\ubcf5)\nsuspend fun massiveRun(action: suspend () -> Unit) {\n val n = 100\n val k = 1000\n val elapsed = measureTimeMillis {\n coroutineScope {\n repeat(n) {\n launch {\n repeat(k) { action() }\n }\n }\n }\n }\n println(\"$elapsed ms\ub3d9\uc548 ${n * k}\uac1c\uc758 \uc561\uc158\uc744 \uc218\ud589\ud588\uc2b5\ub2c8\ub2e4.\") \n}\n\n\/\/ ConterMsg\ub9cc \ub2e4\ub8e8\ub294 \uc561\ud130\nfun CoroutineScope.counterActor() = actor<\/strong><CounterMsg> {\n var counter = 0\n for (msg in channel) {\n when (msg) {\n is IncCounter -> counter++\n is GetCounter -> msg.response.complete(counter)\n }\n }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\ucf54\ub8e8\ud2f4(Coroutines)\uc774\ub780? \ucf54\ub8e8\ud2f4\uc740 \ube44\ub3d9\uae30\uc801\uc73c\ub85c \uc2e4\ud589\ub418\ub294 \ucf54\ub4dc\ub97c \uac04\uc18c\ud654\ud558\uae30 \uc704\ud574 Android\uc5d0\uc11c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \ub3d9\uc2dc \uc2e4\ud589 \uc124\uacc4 \ud328\ud134\uc774\ub2e4. \ucf54\ub8e8\ud2f4\uc740 \ub2e4\uc74c\uacfc \uac19\uc740 \ud2b9\uc9d5\uc744 \uac16\ub294\ub2e4. \uacbd\ub7c9\ud654 \uba54\ubaa8\ub9ac \ub204\uc218 \uac10\uc18c \uacc4\uce35\uc801 \uad6c\uc870\ub97c \ud1b5\ud55c \ucde8\uc18c \uc804\ub2ec Jetpack\uacfc\uc758 \ud1b5\ud569 Suspend function suspend(\uc720\uc608\ud558\ub2e4, \uc5f0\uae30\ud558\ub2e4) vs block(\ub9c9\ub2e4, \ucc28\ub2e8\ud558\ub2e4) blocking\uacfc suspending\uc758 \ucc28\uc774\uc5d0 \ub300\ud574\uc11c \uba3c\uc800 \uc54c\uc544\ubcf4\uc790. \ub2e8\uc77c \uc4f0\ub808\ub4dc\uc5d0\uc11c \ub124\ud2b8\uc6cc\ud06c \uc694\uccad(FUNCTION A)\uacfc \uac19\uc740 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[5],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/45962"}],"collection":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=45962"}],"version-history":[{"count":1,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/45962\/revisions"}],"predecessor-version":[{"id":45970,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/45962\/revisions\/45970"}],"wp:attachment":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=45962"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=45962"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=45962"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"\"](\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2022\/03\/www.charlezz.com-1-t28sfv0jdkbtnaa0eki3pw.png\")
![\"\"](\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2022\/03\/www.charlezz.com-1-ogq6yfxxawg7-lvmkicn5g.png\")
![\"\"](\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2022\/03\/www.charlezz.com-1-pf93e3va3mphjhtmho-j1a.png\")