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各レイヤーからのエラーについて考える
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yoshiyoshifujii
October 21, 2017
Programming
3
3.4k
各レイヤーからのエラーについて考える
関西Javaエンジニアの会(関ジャバ) '17 10月度
https://kanjava.connpass.com/event/68169/
yoshiyoshifujii
October 21, 2017
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Transcript
֤ϨΠϠʔ͔Βͷ Τϥʔʹ͍ͭͯߟ͑Δ 4BU !ZPTIJZPTIJGVKJJ
͜Μʹͪ w:PTIJUBLB'VKJJ !ZPTIJZPTIJGVKJJ w4PGUXBSF&OHJOFFS w4DBMB+BWB1ZUIPO 5ZQFTDSJQU w4DBMBؔ4VNNJU4UB⒎
ձεϙϯαʔͬͯ·͢
ି͠ग़͠Ͱ͖Δ෦ w ηϛφʔϗʔϧ ໊ w ձٞࣨ ໊͔Β໊ w
ΧϑΣεϖʔε ໊ w ϏΞόογϡͳͲͷ࠙ձ։࠵ՄೳͰ͢ʂ
ࠓͷ͓ͷલఏ w3&45"1*ͷαʔόαΠυ ը໘ؚΈ·ͤΜ w4DBMB w࣮ફͯ͠Έͨ݁ՌΛཧ w.BZFSຊಡΜͰ·ͤΜ
Τϥʔͷྨ wϢʔβʔͷૢ࡞ΛىҼͱ͢ΔΤϥʔ wγεςϜͷোΛىҼͱ͢ΔΤϥʔ
Ϣʔβʔͷૢ࡞ΛىҼͱ͢Δ wܖʹҧ͢ΔΑ͏ͳૢ࡞ wඞਢɺ͞ɺܕɺॏෳͳͲ wجຊతʹը໘ଆͰ֬ೝ͢Δ wࠓճɺ"1*Λݺͼग़͢͜ͱΛఆ wෆਖ਼ΞΫηε
γεςϜͷোΛىҼͱ͢Δ w*0ྫ֎ w/FUXPSLɺ4ZTUFN%PXO wόά w͵ΔΆ
)551εςʔλείʔυ wϢʔβʔͷૢ࡞൪ wγεςϜͷো൪
υϝΠϯۦಈઃܭ
-BZFSFE"SDIJUFDUVSF w6TFS*OUFSGBDF w"QQMJDBUJPO w%PNBJO w*OGSBTUSVDUVSF &WBOT &SJD%PNBJO%SJWFO%FTJHO5BDLMJOH$PNQMFYJUZJOUIF)FBSUPG4PGUXBSF ,JOEMFͷҐஔ/P 1FBSTPO&EVDBUJPO,JOEMF൛
ࡾ υϝΠϯϞσϧ wϓϨθϯςʔγϣϯ wΞϓϦέʔγϣϯ wσʔλιʔε wυϝΠϯϞσϧ ૿ాږݱͰཱͭγεςϜઃܭͷݪଇʙมߋΛָͰ҆શʹ͢ΔΦϒδΣΫτࢦͷ࣮ફٕ๏ ,JOEMFͷҐஔ/P גࣜձٕࣾज़ධࣾ,JOEMF൛
ΦχΦϯΞʔΩςΫνϟ wΠϯλʔϑΣʔε wΞϓϦέʔγϣϯ wυϝΠϯ wΠϯϑϥετϥΫνϟ IUUQTTQFBLFSEFDLDPNDSPTTSPBETDBMBPOEEE TMJEF
ΠϯϑϥετϥΫνϟ Πϯϑϥ αʔϏε υϝΠϯ ϨΠϠʔͰѻ͏Τϥʔ ΠϯλʔϑΣʔε ΞϓϦέʔγϣϯ ϑΝΫτϦ ΤϯςΟςΟ υϝΠϯ
αʔϏε ϦϙδτϦ ΠϕϯτύϒϦ ογϟ ϦϙδτϦ࣮ Πϕϯτ ύϒϦογϟ࣮ +BWBϥΠϒϥϦ +%#$υϥΠό ྫ֎ ϦϙδτϦ Τϥʔ ΞϓϦέʔγ ϣϯΤϥʔ υϝΠϯ Τϥʔ ࢀߟIUUQTTQFBLFSEFDLDPNDSPTTSPBETDBMBPOEEE TMJEF 5SZ\ʜ^Ͱғͬͯྫ֎Λ 5SZܕʹม 5SZ
υϝΠϯ
υϝΠϯͷΤϥʔ wܖҧ wඞਢ wܕνΣοΫ w͞ɺ͔͞ wॏෳ w%PNBJO&SSPSܕ
ϦϙδτϦυϝΠϯͱಉ͡ wυϝΠϯʹϦϙδτϦΛఆٛ͢Δ wυϝΠϯͷΤϥʔܕͱಉ͡ʹ͢Δ͔
ϦϙδτϦͷΛߟ͑Δ wυϝΠϯͷӬଓԽ w࠶ੜ w*0ྫ֎ΛΑ͘ѻ͍ͦ͏
ϦϙδτϦͰҙ֎ͱߟྀ͖͢͜ͱ wָ؍ഉଞ 0QUJNJTUJD-PDLJOH w/PU'PVOE 0QUJPOPS'BJMVSF w͜ΕΒΛܕͰද໌ͨ͘͠ͳΔ
ϑΝΫτϦυϝΠϯͱಉ͡ wϑΝΫτϦυϝΠϯΛੜ͢Δ wυϝΠϯͷੜ࣌ʹܖҧΛ֬ೝ͢ Δ wυϝΠϯͷΤϥʔͱಉ͡Ͱྑ͍
ΠϕϯτύϒϦογϟ wυϝΠϯΠϕϯτͷύϒϦογϡ wܖҧͷݕূऴΘͬͨঢ়ଶ w*0ྫ֎ͷΈΛߟྀͰྑ͍
υϝΠϯαʔϏε wυϝΠϯͷϏδωεϧʔϧΛѻ͏ wܖҧΛѻ͏ wϦϙδτϦѻΘͳ͍
υϝΠϯͷΤϥʔܕ w%PNBJO&SSPSܕ w3FQPTJUPSZ&SSPSܕ wྫ֎ TDBMBVUJM5SZ
Πϯϑϥ ετϥΫνϟ
ΠϯϑϥετϥΫνϟ Πϯϑϥ αʔϏε υϝΠϯ ϨΠϠʔͰѻ͏Τϥʔ ΠϯλʔϑΣʔε ΞϓϦέʔγϣϯ ϑΝΫτϦ ΤϯςΟςΟ υϝΠϯ
αʔϏε ϦϙδτϦ ΠϕϯτύϒϦ ογϟ ϦϙδτϦ࣮ Πϕϯτ ύϒϦογϟ࣮ +BWBϥΠϒϥϦ +%#$υϥΠό ྫ֎ ϦϙδτϦ Τϥʔ ΞϓϦέʔγ ϣϯΤϥʔ υϝΠϯ Τϥʔ ࢀߟIUUQTTQFBLFSEFDLDPNDSPTTSPBETDBMBPOEEE TMJEF 5SZ\ʜ^Ͱғͬͯྫ֎Λ 5SZܕʹม 5SZ
ϦϙδτϦ࣮ wυϝΠϯͷఆٛʹै͏ w3%#ɺ,74ɺ"84 ,JOFTJTɺ424ɺ4 w+BWB-JCSBSZ wྫ֎ΛUSZDBUDIͯ͠$POWFSU w-JCSBSZͷґଘܕด͡ࠐΊΔ
ΠϕϯτύϒϦογϟ࣮ wྫ֎Λͦͷ··ѻ͏ wಛผʹܕΛఆٛͯ͠ѻΘͳ͍
ΠϯϑϥετϥΫνϟαʔϏε wυϝΠϯͰදݱ͢Δඞཁͷͳ͍Πϯϑϥ ૢ࡞ wϑΝΠϧΞοϓϩʔυΛςϯϙϥϦʔʹ Ұ࣌อଘ w҉߸Խ෮߸
ΠϯϑϥετϥΫνϟͷΤϥʔܕ w3FQPTJUPSZ&SSPSܕ wྫ֎
ΞϓϦέʔγϣϯ
ΠϯϑϥετϥΫνϟ Πϯϑϥ αʔϏε υϝΠϯ ϨΠϠʔͰѻ͏Τϥʔ ΠϯλʔϑΣʔε ΞϓϦέʔγϣϯ ϑΝΫτϦ ΤϯςΟςΟ υϝΠϯ
αʔϏε ϦϙδτϦ ΠϕϯτύϒϦ ογϟ ϦϙδτϦ࣮ Πϕϯτ ύϒϦογϟ࣮ +BWBϥΠϒϥϦ +%#$υϥΠό ྫ֎ ϦϙδτϦ Τϥʔ ΞϓϦέʔγ ϣϯΤϥʔ υϝΠϯ Τϥʔ ࢀߟIUUQTTQFBLFSEFDLDPNDSPTTSPBETDBMBPOEEE TMJEF 5SZ\ʜ^Ͱғͬͯྫ֎Λ 5SZܕʹม 5SZ
ΞϓϦέʔγϣϯαʔϏε wϢʔεέʔεهड़Λॻ͘Α͏ʹ wϢʔεέʔεͱͯ͠ΤϥʔΛද໌͢Δ w%PNBJO&SSPS 3FQPTJUPSZ&SSPS ྫ֎ Λ$POWFSU
ΞϓϦέʔγϣϯΤϥʔ wϢʔεέʔεͱͯ͠ͷ Τϥʔද໌ w/PU'PVOE w#BE3FRVFTU w4ZTUFN&SSPS
$POWFSUΛཧ w%PNBJO&SSPS"QQMJDBUJPO&SSPS w3FQPTJUPSZ&SSPS"QQMJDBUJPO&SSPS wྫ֎"QQMJDBUJPO&SSPS
$POWFSUΛཧ wΤϥʔܕΛද໌ͨ͜͠ͱͰ$POWFSU͕ େม wશͯ"QQMJDBUJPO&SSPSʹ͢Δ w$POWFSUΛ͏·࣮͘͠ͳ͍ͱਏ͍
object ApplicationErrorConverters { implicit class DomainError2ApplicationError[E](val e: Either[DomainError, E]) extends
AnyVal { def toApplicationError: Either[ApplicationError, E] = e.fold( l => Left(BadRequestError(Option(l.message))), Right(_) ) } }
object ApplicationErrorConverters { implicit class RepositoryError2ApplicationError[E](val e: Either[RepositoryError, E]) extends
AnyVal { def toApplicationError: Either[ApplicationError, E] = e.fold( { case _: RepositoryOptimisticError => Left(ConflictError) case _: RepositoryNotFoundError => Left(NoContentsError) case _: RepositoryAlreadyExistsError => Left(BadRequestError(Some("already_exists"))) case RepositorySystemError(t) => Left(InternalServerError(t)) }, Right(_) ) } }
object ApplicationErrorConverters { implicit class Try2ApplicationError[E](val e: Try[E]) extends AnyVal
{ def toApplicationError: Either[ApplicationError, E] = e.fold( e => Left(InternalServerError(e)), Right(_) ) } }
ΠϯλʔϑΣʔε
ΠϯϑϥετϥΫνϟ Πϯϑϥ αʔϏε υϝΠϯ ϨΠϠʔͰѻ͏Τϥʔ ΠϯλʔϑΣʔε ΞϓϦέʔγϣϯ ϑΝΫτϦ ΤϯςΟςΟ υϝΠϯ
αʔϏε ϦϙδτϦ ΠϕϯτύϒϦ ογϟ ϦϙδτϦ࣮ Πϕϯτ ύϒϦογϟ࣮ +BWBϥΠϒϥϦ +%#$υϥΠό ྫ֎ ϦϙδτϦ Τϥʔ ΞϓϦέʔγ ϣϯΤϥʔ υϝΠϯ Τϥʔ ࢀߟIUUQTTQFBLFSEFDLDPNDSPTTSPBETDBMBPOEEE TMJEF 5SZ\ʜ^Ͱғͬͯྫ֎Λ 5SZܕʹม 5SZ
"QQMJDBUJPO&SSPSΛ$POWFSU w)551εςʔλεʹม w/PU'PVOE w#BE3FRVFTU w*OUFSOBM4FSWFS&SSPS
)551Ҏ֎ͷΠϯλϑΣʔε w4VCTDSJCFS w3FDJFWFS w$PNNBOE-JOF*OUFSGBDF
4VCTDSJCFS w/PU'PVOE4LJQ w#BE3FRVFTU4LJQ w*OUFSOBM4FSWFS&SSPS3FUSZ
ΠϯλϑΣʔεʹґଘ͢Δ wΠϯλϑΣʔε͕)551ͳΒ)551ʹ w4VC3FDJFWFSͳΒ4LJQ͔3FUSZ wӬԕʹղফ͞Εͳ͍3FUSZΛ࡞ͬͯॲ ཧΛԆͤ͞ͳ͍Α͏அ͕ཁΔ
'JO