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/

1. ֤ϨΠϠʔ͔Βͷ
   Τϥʔʹ͍ͭͯߟ͑Δ  4BU
   
   !ZPTIJZPTIJGVKJJ
2. ͜Μʹͪ͸ w:PTIJUBLB
   'VKJJ
   !ZPTIJZPTIJGVKJJ
   w4PGUXBSF
   &OHJOFFS
   w4DBMB
   
   +BWB
   
   1ZUIPO
   
   5ZQFTDSJQU
   w4DBMBؔ੢
   4VNNJU
   4UB⒎
3. ձ৔εϙϯαʔ΍ͬͯ·͢
4. ି͠ग़͠Ͱ͖Δ෦԰ w ηϛφʔϗʔϧ ໊
   w ձٞࣨ ໊͔Β໊
   w ΧϑΣεϖʔε ໊
   w ϏΞόογϡͳͲͷ࠙਌ձ΋։࠵ՄೳͰ͢ʂ
5. ࠓ೔ͷ͓࿩ͷલఏ w3&45
   "1*
   ͷαʔόαΠυ
 ը໘͸ؚΈ·ͤΜ
   w4DBMB
   w࣮ફͯ͠Έͨ݁ՌΛ੔ཧ
   w.BZFSຊ͸ಡΜͰ·ͤΜ
6. Τϥʔͷ෼ྨ wϢʔβʔͷૢ࡞ΛىҼͱ͢ΔΤϥʔ
   wγεςϜͷো֐ΛىҼͱ͢ΔΤϥʔ
7. Ϣʔβʔͷૢ࡞ΛىҼͱ͢Δ wܖ໿ʹҧ൓͢ΔΑ͏ͳૢ࡞
   wඞਢɺ௕͞ɺܕɺॏෳͳͲ
   wجຊతʹ͸ը໘ଆͰ֬ೝ͢Δ
   wࠓճ͸ɺ"1*Λ௚઀ݺͼग़͢͜ͱΛ૝ఆ
   wෆਖ਼ΞΫηε
8. γεςϜͷো֐ΛىҼͱ͢Δ w*0ྫ֎
   w/FUXPSLɺ4ZTUFN
   %PXO
   wόά
   w͵ΔΆ
9. )551εςʔλείʔυ wϢʔβʔͷૢ࡞
   
   ൪୆
   wγεςϜͷো֐
   
   ൪୆
10. υϝΠϯۦಈઃܭ
11. -BZFSFE
    "SDIJUFDUVSF w6TFS
    *OUFSGBDF
    w"QQMJDBUJPO
    w%PNBJO
    w*OGSBTUSVDUVSF &WBOT
    &SJD
    %PNBJO%SJWFO
    %FTJHO
    5BDLMJOH
    $PNQMFYJUZ
    JO
    UIF
    )FBSU
    PG
    4PGUXBSF
    ,JOEMF
    ͷҐஔ/P 
    1FBSTPO
    &EVDBUJPO
    ,JOEMF
    ൛
    
12. ࡾ૚ υϝΠϯϞσϧ wϓϨθϯςʔγϣϯ૚
    wΞϓϦέʔγϣϯ૚
    wσʔλιʔε૚
    wυϝΠϯϞσϧ ૿ా
    ږ
    ݱ৔Ͱ໾ཱͭγεςϜઃܭͷݪଇ
    ʙมߋΛָͰ҆શʹ͢ΔΦϒδΣΫτࢦ޲ͷ࣮ફٕ๏
    ,JOEMF
    ͷҐஔ/P 
    גࣜձٕࣾज़ධ࿦ࣾ
    ,JOEMF
    ൛
    
13. ΦχΦϯΞʔΩςΫνϟ wΠϯλʔϑΣʔε
    wΞϓϦέʔγϣϯ
    wυϝΠϯ
    wΠϯϑϥετϥΫνϟ IUUQTTQFBLFSEFDLDPNDSPTTSPBETDBMBPOEEE TMJEF
14. ΠϯϑϥετϥΫνϟ Πϯϑϥ
    αʔϏε υϝΠϯ ϨΠϠʔͰѻ͏Τϥʔ ΠϯλʔϑΣʔε ΞϓϦέʔγϣϯ ϑΝΫτϦ ΤϯςΟςΟ υϝΠϯ
    αʔϏε ϦϙδτϦ ΠϕϯτύϒϦ ογϟ ϦϙδτϦ࣮૷ Πϕϯτ
    ύϒϦογϟ࣮૷ +BWBϥΠϒϥϦ
    +%#$υϥΠό౳ ྫ֎ ϦϙδτϦ Τϥʔ ΞϓϦέʔγ ϣϯΤϥʔ υϝΠϯ
    Τϥʔ ࢀߟ
    IUUQTTQFBLFSEFDLDPNDSPTTSPBETDBMBPOEEE TMJEF 5SZ
    \ʜ^Ͱғͬͯྫ֎Λ 5SZܕʹม׵ 5SZ
15. υϝΠϯ૚
16. υϝΠϯ૚ͷΤϥʔ wܖ໿ҧ൓
    wඞਢ
    wܕνΣοΫ w௕͞ɺ୹͔͞
    wॏෳ
    w%PNBJO&SSPSܕ
17. ϦϙδτϦ͸υϝΠϯͱಉ͡ wυϝΠϯ૚ʹϦϙδτϦΛఆٛ͢Δ
    wυϝΠϯͷΤϥʔܕͱಉ͡ʹ͢Δ͔
18. ϦϙδτϦͷ੹຿Λߟ͑Δ wυϝΠϯͷӬଓԽ
    w࠶ੜ੒
    w*0ྫ֎ΛΑ͘ѻ͍ͦ͏
19. ϦϙδτϦͰҙ֎ͱߟྀ͢΂͖͜ͱ wָ؍ഉଞ
    0QUJNJTUJD
    -PDLJOH
    w/PU
    'PVOE
    0QUJPO
    PS
    'BJMVSF
    w͜ΕΒΛܕͰද໌ͨ͘͠ͳΔ
20. ϑΝΫτϦ͸υϝΠϯͱಉ͡ wϑΝΫτϦ͸υϝΠϯΛੜ੒͢Δ
    wυϝΠϯͷੜ੒࣌ʹܖ໿ҧ൓Λ֬ೝ͢ Δ
    wυϝΠϯͷΤϥʔͱಉ͡Ͱྑ͍
21. ΠϕϯτύϒϦογϟ͸ wυϝΠϯΠϕϯτͷύϒϦογϡ
    wܖ໿ҧ൓ͷݕূ͸ऴΘͬͨঢ়ଶ
    w*0ྫ֎ͷΈΛߟྀͰྑ͍
22. υϝΠϯαʔϏε͸ wυϝΠϯͷϏδωεϧʔϧΛѻ͏
    wܖ໿ҧ൓Λѻ͏
    wϦϙδτϦ͸ѻΘͳ͍
23. υϝΠϯ૚ͷΤϥʔܕ w%PNBJO&SSPSܕ
    w3FQPTJUPSZ&SSPSܕ
    wྫ֎ TDBMBVUJM5SZ
24. Πϯϑϥ
    ετϥΫνϟ૚
25. ΠϯϑϥετϥΫνϟ Πϯϑϥ
    αʔϏε υϝΠϯ ϨΠϠʔͰѻ͏Τϥʔ ΠϯλʔϑΣʔε ΞϓϦέʔγϣϯ ϑΝΫτϦ ΤϯςΟςΟ υϝΠϯ
    αʔϏε ϦϙδτϦ ΠϕϯτύϒϦ ογϟ ϦϙδτϦ࣮૷ Πϕϯτ
    ύϒϦογϟ࣮૷ +BWBϥΠϒϥϦ
    +%#$υϥΠό౳ ྫ֎ ϦϙδτϦ Τϥʔ ΞϓϦέʔγ ϣϯΤϥʔ υϝΠϯ
    Τϥʔ ࢀߟ
    IUUQTTQFBLFSEFDLDPNDSPTTSPBETDBMBPOEEE TMJEF 5SZ
    \ʜ^Ͱғͬͯྫ֎Λ 5SZܕʹม׵ 5SZ
26. ϦϙδτϦ࣮૷ wυϝΠϯ૚ͷఆٛʹै͏
    w3%#ɺ,74ɺ"84
    ,JOFTJTɺ424ɺ4
    w+BWB
    -JCSBSZ
    wྫ֎ΛUSZDBUDIͯ͠$POWFSU
    w-JCSBSZͷґଘܕ͸ด͡ࠐΊΔ
27. ΠϕϯτύϒϦογϟ࣮૷ wྫ֎Λͦͷ··ѻ͏
    wಛผʹܕΛఆٛͯ͠ѻΘͳ͍
28. ΠϯϑϥετϥΫνϟαʔϏε wυϝΠϯͰදݱ͢Δඞཁͷͳ͍Πϯϑϥ ૢ࡞
    wϑΝΠϧΞοϓϩʔυΛςϯϙϥϦʔʹ Ұ࣌อଘ
    w҉߸Խ
    
    ෮߸
29. ΠϯϑϥετϥΫνϟ૚ͷΤϥʔܕ w3FQPTJUPSZ&SSPSܕ
    wྫ֎
30. ΞϓϦέʔγϣϯ
    ૚
31. ΠϯϑϥετϥΫνϟ Πϯϑϥ
    αʔϏε υϝΠϯ ϨΠϠʔͰѻ͏Τϥʔ ΠϯλʔϑΣʔε ΞϓϦέʔγϣϯ ϑΝΫτϦ ΤϯςΟςΟ υϝΠϯ
    αʔϏε ϦϙδτϦ ΠϕϯτύϒϦ ογϟ ϦϙδτϦ࣮૷ Πϕϯτ
    ύϒϦογϟ࣮૷ +BWBϥΠϒϥϦ
    +%#$υϥΠό౳ ྫ֎ ϦϙδτϦ Τϥʔ ΞϓϦέʔγ ϣϯΤϥʔ υϝΠϯ
    Τϥʔ ࢀߟ
    IUUQTTQFBLFSEFDLDPNDSPTTSPBETDBMBPOEEE TMJEF 5SZ
    \ʜ^Ͱғͬͯྫ֎Λ 5SZܕʹม׵ 5SZ
32. ΞϓϦέʔγϣϯαʔϏε wϢʔεέʔεهड़Λॻ͘Α͏ʹ
    wϢʔεέʔεͱͯ͠ΤϥʔΛද໌͢Δ
    w%PNBJO&SSPS
    3FQPTJUPSZ&SSPS
    ྫ֎ Λ$POWFSU
33. ΞϓϦέʔγϣϯΤϥʔ wϢʔεέʔεͱͯ͠ͷ Τϥʔද໌
    w/PU
    'PVOE
    w#BE
    3FRVFTU
    w4ZTUFN
    &SSPS
34. $POWFSUΛ੔ཧ w%PNBJO&SSPS
    
    "QQMJDBUJPO&SSPS
    w3FQPTJUPSZ&SSPS
    
    "QQMJDBUJPO&SSPS
    wྫ֎
    
    "QQMJDBUJPO&SSPS
35. $POWFSUΛ੔ཧ wΤϥʔܕΛද໌ͨ͜͠ͱͰ$POWFSU͕ େม
    wશͯ"QQMJDBUJPO&SSPSʹ͢Δ
    w$POWFSUΛ͏·࣮͘૷͠ͳ͍ͱਏ͍
36. object ApplicationErrorConverters { implicit class DomainError2ApplicationError[E](val e: Either[DomainError, E]) extends AnyVal { def toApplicationError: Either[ApplicationError, E] = e.fold( l => Left(BadRequestError(Option(l.message))), Right(_) ) } }
37. object ApplicationErrorConverters { implicit class RepositoryError2ApplicationError[E](val e: Either[RepositoryError, E]) extends AnyVal { def toApplicationError: Either[ApplicationError, E] = e.fold( { case _: RepositoryOptimisticError => Left(ConflictError) case _: RepositoryNotFoundError => Left(NoContentsError) case _: RepositoryAlreadyExistsError => Left(BadRequestError(Some("already_exists"))) case RepositorySystemError(t) => Left(InternalServerError(t)) }, Right(_) ) } }
38. object ApplicationErrorConverters { implicit class Try2ApplicationError[E](val e: Try[E]) extends AnyVal { def toApplicationError: Either[ApplicationError, E] = e.fold( e => Left(InternalServerError(e)), Right(_) ) } }
39. ΠϯλʔϑΣʔε
    ૚
40. ΠϯϑϥετϥΫνϟ Πϯϑϥ
    αʔϏε υϝΠϯ ϨΠϠʔͰѻ͏Τϥʔ ΠϯλʔϑΣʔε ΞϓϦέʔγϣϯ ϑΝΫτϦ ΤϯςΟςΟ υϝΠϯ
    αʔϏε ϦϙδτϦ ΠϕϯτύϒϦ ογϟ ϦϙδτϦ࣮૷ Πϕϯτ
    ύϒϦογϟ࣮૷ +BWBϥΠϒϥϦ
    +%#$υϥΠό౳ ྫ֎ ϦϙδτϦ Τϥʔ ΞϓϦέʔγ ϣϯΤϥʔ υϝΠϯ
    Τϥʔ ࢀߟ
    IUUQTTQFBLFSEFDLDPNDSPTTSPBETDBMBPOEEE TMJEF 5SZ
    \ʜ^Ͱғͬͯྫ֎Λ 5SZܕʹม׵ 5SZ
41. "QQMJDBUJPO&SSPSΛ$POWFSU w)551εςʔλεʹม׵
    w/PU
    'PVOE
    
    
    w#BE
    3FRVFTU
    
    
    w*OUFSOBM
    4FSWFS
    &SSPS
    
    
42. )551Ҏ֎ͷΠϯλϑΣʔε w4VCTDSJCFS
    w3FDJFWFS
    w$PNNBOE
    -JOF
    *OUFSGBDF
43. 4VCTDSJCFS w/PU
    'PVOE
    
    4LJQ
    w#BE
    3FRVFTU
    
    4LJQ
    w*OUFSOBM
    4FSWFS
    &SSPS
    
    3FUSZ
44. ΠϯλϑΣʔεʹґଘ͢Δ wΠϯλϑΣʔε͕)551ͳΒ)551ʹ
    w4VC
    
    3FDJFWFSͳΒ4LJQ͔3FUSZ
    wӬԕʹղফ͞Εͳ͍3FUSZΛ࡞ͬͯॲ ཧΛ஗Ԇͤ͞ͳ͍Α͏൑அ͕ཁΔ
45. 'JO