5分で導入！Failurewall で障害対策 / Failurewall - ScalaMatsuri 2016

෼Ͱಋೖʂ 'BJMVSFXBMMͰো֐ରࡦ @okumin

I am @okumin. ß  IUUQTUXJUUFSDPNPLVNJO ß  IUUQTHJUIVCDPNPLVNJO ß  IUUQRJJUBDPNPLVNJO ß 
IUUQCMPHPLVNJODPN

akka-persistence-sql-async ß  "LLBQFSTJTUFODFͷϓϥάΠϯ ß  4DBMJLF+%#$"TZODΛ࢖ͬͯ࡞ͬͨ ß  IUUQTHJUIVCDPNPLVNJOBLLBQFSTJTUFODFTRMBTZOD

scalacture ß  4DBMBͰ༷ʑͳσʔλߏ଄Λ࣮૷͍ͨ͠ϥΠϒϥϦ ß  IUUQTHJUIVCDPNPLVNJOTDBMBDUVSF

ainterface ß  "LLBͷ্Ͱ&SMBOHOPEF͕࡞ΕΔϥΠϒϥϦ ß  IUUQTHJUIVCDPNBJOUFSGBDFBJOUFSGBDF

ґଘγεςϜͱো֐

8FC ΞϓϦ 3FEJT .Z42- &MBTUJDTFBSDI 5XJUUFS 'BDFCPPL

Failurewall

Failurewall ß  ΤϥʔॲཧΛγϯϓϧʹऔΓѻ͏ͨΊͷϥΠϒϥϦ ß  )ZTUSJYʹΠϯεύΠϠ͞Εͨ ß  IUUQTHJUIVCDPNGBJMVSFXBMMGBJMVSFXBMM

࢖͍ํ trait HTTPClient { def get(url: String): Future[HTTPResponse]
} val client: HTTPClient = ??? // ԿΒ͔ͷΤϥʔॲཧΛߦ͏Failurewall val wall: Failurewall[HTTPResponse, HTTPResponse] = ??? val actual: Future[HTTPResponse] = wall.call { client.get("https://twitter.com/okumin") }

༷ʑͳน

Retry ß  Ұ࣌తͳΤϥʔ͸ϦτϥΠʹΑΔϦΧόϦʔ͕༗ޮ ϚΠΞϓϦέʔγϣϯ 5XJUUFS

Retry val system = ActorSystem("mofu") val strategy = ExponentialBackoffStrategy(
minBackoff = 1.seconds, maxBackoff = 5.seconds ) val retry = AkkaRetryFailurewall[HTTPResponse]( maxTrialTimes = 5, strategy, system.scheduler, system.dispatcher )

Semaphore ß  ಉҰϦιʔεͷಉ࣌࢖༻਺Λ੍ޚ ϚΠΞϓϦέʔγϣϯ 5XJUUFS

Semaphore val executor: ExecutionContext = ??? val semaphore =
StdSemaphoreFailurewall[HTTPResponse]( permits = 128, executor )

Circuit Breaker ß  ґଘγεςϜͷ௕Ҿ͘ো֐ʹରॲ ß  ো֐Λݕ஌͢Δͱݺͼग़͠ΛఘΊ͙ͯ͢ʹΤϥʔΛฦ͢ GBJMGBTU $-04&% ਖ਼ৗϞʔυ )"-'01&/
෮چ֬ೝϞʔυ 01&/ GBJMGBTUϞʔυ

Circuit Breaker val system = ActorSystem("mofu") val circuitBreaker =
AkkaCircuitBreakerFailurewall[HTTPResponse]( system.scheduler, maxFailures = 16, callTimeout = 5.seconds, resetTimeout = 10.seconds, system.dispatcher )

Composable ß  ΋͏Կ΋ා͘ͳ͍ val retry: Failurewall[HTTPResponse, HTTPResponse] = ???
val semaphore: Failurewall[HTTPResponse, HTTPResponse] = ??? val circuitBreaker: Failurewall[HTTPResponse, HTTPResponse] = ??? circuitBreaker compose semaphore compose retry

੕Λ͍ͩ͘͞ ß  ϓϧϦΫ΋େ׻ܴ ß  IUUQTHJUIVCDPNGBJMVSFXBMMGBJMVSFXBMM

5分で導入！Failurewall で障害対策 / Failurewall - ScalaMatsuri 2016

5分で導入！Failurewall で障害対策 / Failurewall - ScalaMatsuri 2016

okumin

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෼Ͱಋೖʂ 'BJMVSFXBMMͰো֐ରࡦ @okumin

I am @okumin. ß  IUUQTUXJUUFSDPNPLVNJO ß  IUUQTHJUIVCDPNPLVNJO ß  IUUQRJJUBDPNPLVNJO ß

akka-persistence-sql-async ß  "LLBQFSTJTUFODFͷϓϥάΠϯ ß  4DBMJLF+%#$"TZODΛ࢖ͬͯ࡞ͬͨ ß  IUUQTHJUIVCDPNPLVNJOBLLBQFSTJTUFODFTRMBTZOD

scalacture ß  4DBMBͰ༷ʑͳσʔλߏ଄Λ࣮૷͍ͨ͠ϥΠϒϥϦ ß  IUUQTHJUIVCDPNPLVNJOTDBMBDUVSF

ainterface ß  "LLBͷ্Ͱ&SMBOHOPEF͕࡞ΕΔϥΠϒϥϦ ß  IUUQTHJUIVCDPNBJOUFSGBDFBJOUFSGBDF

ґଘγεςϜͱো֐

8FC ΞϓϦ 3FEJT .Z42- &MBTUJDTFBSDI 5XJUUFS 'BDFCPPL

8FC ΞϓϦ 3FEJT .Z42- &MBTUJDTFBSDI 5XJUUFS 'BDFCPPL

Failurewall

Failurewall ß  ΤϥʔॲཧΛγϯϓϧʹऔΓѻ͏ͨΊͷϥΠϒϥϦ ß  )ZTUSJYʹΠϯεύΠϠ͞Εͨ ß  IUUQTHJUIVCDPNGBJMVSFXBMMGBJMVSFXBMM

࢖͍ํ trait HTTPClient { def get(url: String): Future[HTTPResponse]

༷ʑͳน

Retry ß  Ұ࣌తͳΤϥʔ͸ϦτϥΠʹΑΔϦΧόϦʔ͕༗ޮ ϚΠΞϓϦέʔγϣϯ 5XJUUFS

Retry val system = ActorSystem("mofu") val strategy = ExponentialBackoffStrategy(

Semaphore ß  ಉҰϦιʔεͷಉ࣌࢖༻਺Λ੍ޚ ϚΠΞϓϦέʔγϣϯ 5XJUUFS

Semaphore val executor: ExecutionContext = ??? val semaphore =

Circuit Breaker ß  ґଘγεςϜͷ௕Ҿ͘ো֐ʹରॲ ß  ো֐Λݕ஌͢Δͱݺͼग़͠ΛఘΊ͙ͯ͢ʹΤϥʔΛฦ͢ GBJMGBTU $-04&% ਖ਼ৗϞʔυ )"-'01&/

Circuit Breaker val system = ActorSystem("mofu") val circuitBreaker =

Composable ß  ΋͏Կ΋ා͘ͳ͍ val retry: Failurewall[HTTPResponse, HTTPResponse] = ???

੕Λ͍ͩ͘͞ ß  ϓϧϦΫ΋େ׻ܴ ß  IUUQTHJUIVCDPNGBJMVSFXBMMGBJMVSFXBMM