JJUG_CCC_2017_Spring2.pdf

test

Transcript

1. © Works Applications Co.,Ltd.
   #ccc_f3
   2017 May/20th, JJUG CCC 2017 Spring
   SpotBugs(FindBugs)ʹΑΔ
   େن໛ERPͷίʔυ඼࣭վળ
   1
   

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2. © Works Applications Co.,Ltd.
   #ccc_f3
   Agenda
   ‣ ࣗݾ঺հ
   ‣ 2017೥5݄ݱࡏͷJava੩తղੳπʔϧػೳɾಈ޲ൺֱ
   ‣ େن໛ERPͷίʔυ඼๊࣭͕͑Δ໰୊ͱͦͷղܾ
   ‣ ։ൃ͍ͯ͠Δ૊৫ͱͦͷ੡඼
   ‣ ߦ͍ͬͯΔ޻෉ͱࠓޙͷల๬
   2
   

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3. © Works Applications Co.,Ltd.
   #ccc_f3
   ͜ͷηογϣϯͰಘΒΕΔ΋ͷ
   ‣ େن໛։ൃʹͯӡ༻Մೳͳίʔυ඼࣭վળख๏
   ‣ άϩʔόϧͰେن໛ͳJava։ൃʹ͓͍ͯඞਢͱͳΔ

   ʮίʔυ඼࣭ͷఈ্͛ʯͷ࣮ફతͳख๏
   ‣ ࣾ಺FW΍ϥΠϒϥϦͷ࢖͍ํΛ޿ΊΔख๏ͱͯ͠

   ׆༻Ͱ͖Δ੩తղੳπʔϧϓϥάΠϯͷ։ൃख๏
   3
   

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4. © Works Applications Co.,Ltd.
   #ccc_f3
   ࣗݾ঺հ
   ✤ https://github.com/
   KengoTODA/
   ✤ ᷂ϫʔΫεΞϓϦέʔγϣϯζ

   ݚڀ։ൃΤϯδχΞ
   ✤ ߴߍੜͷͱ͖ʹήʔϜ࡞Γͨͯ͘

   HSP2ʹखΛग़͠ɺϑϦʔιϑτ
   ΢ΣΞ࡞Ոɺͦͯ͠R&Dʹ
   ✤ SpotBugsͷதͷਓ
   JVM Simulator
   Maven3 ebook
   4
   

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5. © Works Applications Co.,Ltd.
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   1. 2017೥5݄ݱࡏͷ

   Java੩తղੳπʔϧػೳɾಈ޲ൺֱ
   5
   

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6. © Works Applications Co.,Ltd.
   #ccc_f3
   ੩తղੳπʔϧͷྑ͍ͱ͜Ζ
   ✤ ࢖͍खʹܦݧ΍ਂ͍஌͕ࣝͳͯ͘΋ɺ
   ✤ ϨϏϡʔલ΍σϓϩΠલͳͲૣ͍ஈ֊Ͱɺ
   ✤ ໰୊ΛൃݟͰ͖Δ
   6
   

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7. © Works Applications Co.,Ltd.
   #ccc_f3
   ൺֱର৅Java੩తղੳπʔϧ
   ‣ Checkstyle
   ‣ PMD
   ‣ FindBugs / SpotBugs
   ‣ Checker Framework
   ‣ Google error-prone
   7
   

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8. © Works Applications Co.,Ltd.
   #ccc_f3
   Checkstyle
   ‣ ιʔείʔυղੳͳͷͰίϯύΠϧͳ͠Ͱ࣮ߦͰ͖Δ
   ‣ ଟ࠼ͳIDEɾϏϧυπʔϧʹରԠ
   ‣ ίʔσΟϯάن໿ͷ֬ೝ͕ओ໨త
   ‣ ϓϥάΠϯ࣮૷ʹඞཁͳ஌͕ࣝগͳ͍
   ‣ http://checkstyle.sourceforge.net/
   8
   

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9. © Works Applications Co.,Ltd.
   #ccc_f3
   PMD
   ‣ ιʔείʔυղੳͳͷͰίϯύΠϧͳ͠Ͱ࣮ߦͰ͖Δ
   ‣ ଟ࠼ͳIDEɾϏϧυπʔϧͦͯ͠ݴޠʹରԠ
   ‣ CPDʢίϐϖݕग़ʣػೳ΋౥ࡌ
   ‣ ϓϥάΠϯ࣮૷͸ΘΓͱෳࡶ
   ‣ https://pmd.github.io/
   9
   

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10. © Works Applications Co.,Ltd.
    #ccc_f3
    FindBugs / SpotBugs
    ‣ όΠτίʔυղੳͳͷͰίʔυʹͳ͍৘ใʢ਌Ϋϥεɺ

    ґଘઌɺΞϊςʔγϣϯ౳ʣ΋CLASSPATH͔Βิ׬Ͱ͖Δ
    ‣ ଟ࠼ͳIDEɾϏϧυπʔϧʹରԠ
    ‣ ͠͹Β͘։ൃ͕ࢭ·͍ͬͯͨʢ3.0.1͸2೥ऑલͷϦϦʔεʣ
    ‣ ϓϥάΠϯ࣮૷ʹ͸JVM΍όΠτίʔυͷ஌͕ࣝ͋Δͱྑ͍
    ‣ https://spotbugs.github.io/
    10
    

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11. © Works Applications Co.,Ltd.
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    ࢀߟɿJSR305Ξϊςʔγϣϯͷࠓ
    ‣ javax.annotation ύοέʔδʹؚ·ΕΔ

    ˏNonnull ΍ˏUntaintedͳͲͷΞϊςʔγϣϯ
    ‣ JSR305͕Dormantͱͳͬͨޙ΋FindBugs͕഑෍͍ͯͨ͠
    ‣ SpotBugsʹΑΔϝϯςφϯε༧ఆແ͠
    ‣ ܕύϥϝʔλʹ࢖͏͜ͱ΋Ͱ͖ͳ͍ͷͰ

    ࠓޙԺ΍͔ʹஔ͖׵͑ΒΕ͍ͯ͘ͷͰ͸
    11
    

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12. © Works Applications Co.,Ltd.
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    Checker Framework
    ‣ Java8ͷJSR 308 (Annotations on Java Types) Λར༻͢Δ
    ‣ ଟ࠼ͳIDEɾϏϧυπʔϧʹରԠ
    ‣ JDKʹؚ·ΕΔΫϥεͷৼΔ෣͍Λσʔλϕʔεʹ࣋ͭ
    ‣ https://checkerframework.org/
    12
    

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13. © Works Applications Co.,Ltd.
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    Google error-prone
    ‣ ίϯύΠϧ࣌ʹղੳ͢ΔͷͰίʔυʹͳ͍৘ใ΋र͍΍͍͢
    ‣ ιʔείʔυͷࣗಈमਖ਼Λ౰ॳ͔Βҙ͍ࣝͯ͠Δʁ
    ‣ EclipseඇରԠʢcom.sun.* ύοέʔδʹґଘͷͨΊʣ
    ‣ ৭ʑϞμϯͰϓϥάΠϯ࣮૷΋͠΍͍͢
    ‣ GoogleࣾһҎ֎͔ΒͷPR͸ʢ࣮੷ͱͯ͠ʣड͚෇͚ͯͳ͍
    ‣ http://errorprone.info/
    13
    Refs: http://dl.acm.org/citation.cfm?id=2486877
    

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14. © Works Applications Co.,Ltd.
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    ࠓ࢖͏ͳΒͲͷπʔϧʁ
    14
    ʘ Target Standard Rules Note
    Checkstyle
    7.7
    AST 152 checks ŠŖũƄŎƃŞƄن໿
    PMD
    5.6.1
    AST 287 rules
    (PMD Java)
    ଟݴޠରԠ
    SpotBugs
    3.1.0−RC1
    Bytecode 453 patterns
    (+9 experimentals)
    plugin๛෋
    Checker Fw
    2.1.11
    AST
    (Compiler֦ு)
    19 checkers JSR308ରԠ
    error-prone
    v2.0.19
    AST
    (Compiler֦ு)
    145 patterns
    (+61 experimentals)
    কདྷʹظ଴
    

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15. © Works Applications Co.,Ltd.
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    ࠓ࢖͏ͳΒͲͷπʔϧʁ
    ‣ ͱʹ͔͘਺Λग़͍ͨ͠
    ‣ SpotBugs + Checker Framework
    ‣ Type AnnotationΛ࢖͑͹SpotBugsʹݟ͚ͭΒΕͳ͍໰୊΋

    ᖰΓग़ͤΔՄೳੑ͕͋Δ
    ‣ ղੳʹ࣌ؒΛ͔͚ͨ͘ͳ͍
    ‣ error-proneͰίϯύΠϧ࣌νΣοΫ
    ‣ PMDΛίϯύΠϥͱฒྻ࣮ߦ
    15
    

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16. © Works Applications Co.,Ltd.
    #ccc_f3
    ࠓ࢖͏ͳΒͲͷπʔϧʁ
    ‣ JavaεΩϧͷߴ͍։ൃऀ͕ἧ͍ͬͯΔ
    ‣ Ξϊςʔγϣϯͷར༻Λଅਐ͠Checker FrameworkΛ׆༻͢Δ
    ‣ ఆظతͳSpotBugsͰࡉ͔͍໰୊΋ᖰΓग़͢
    ‣ ։ൃऀͷJavaεΩϧʹ͹Β͖͕ͭ͋Δ
    ‣ CheckstyleͰ࠷௿ݶͷಡΈ΍͢͞Λ୲อ͢Δ
    ‣ CPDͰίϐϖʹܯࠂΛ͢Δʢઅ౓ͷ͋ΔίϐϖΛଅ͢ʣ
    ‣ ಈ࡞Λܰͨ͘͠PMD΍SpotBugsΛ͜·Ίʹճ͠࠷௿ݶͷϛεΛ๷͙
    16
    

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17. © Works Applications Co.,Ltd.
    #ccc_f3
    Agenda
    ‣ ࣗݾ঺հ
    ‣ 2017೥5݄ݱࡏͷJava੩తղੳπʔϧػೳɾಈ޲ൺֱ
    ‣ େن໛ERPͷίʔυ඼๊࣭͕͑Δ໰୊ͱͦͷղܾ
    ‣ ։ൃ͍ͯ͠Δ૊৫ͱͦͷ੡඼
    ‣ ߦ͍ͬͯΔ޻෉ͱࠓޙͷల๬
    17
    

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18. © Works Applications Co.,Ltd.
    #ccc_f3
    2. େن໛ERPͷίʔυ඼࣭͕
    ๊͑Δ໰୊
    18
    

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19. © Works Applications Co.,Ltd.
    #ccc_f3
    גࣜձࣾ
    ϫʔΫεΞϓϦέʔγϣϯζͱ͸
    ✤ ERPύοέʔδͷ։ൃΛߦ͍ͬͯΔاۀ
    ✤ γϯΨϙʔϧɺதࠃɺΠϯυɺΞϝϦΧ౳ʹ΋ڌ఺
    ✤ ίϯγϡʔϚΞϓϦͷΑ͏ͳϢʔβϏϦςΟͱ

    εϐʔυΛ࣋ͭERPʮHUEʢAI WorksʣʯΛ

    ։ൃɾఏڙ
    19
    

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20. © Works Applications Co.,Ltd.
    #ccc_f3
    HUEͷ࣮૷
    ✤ ୤RDB͢ΔͳͲ଎౓ʹͩ͜Θ͍ͬͯͯɺ
    ✤ MSA͠ͳ͍ͱࢮ͵ఔ౓ʹ͸ࢁ΄ͲαʔϏε͕͋Γɺ
    ✤ ಙౡʹݚڀॴ࡞ΔϨϕϧͰࣗવݴޠॲཧʹຊؾͰɺ
    ✤ 100msୡ੒ͷͨΊʹAWS LambdaΛಋೖ͢ΔͳͲ

    ৽͍͜͠ͱ΋৭ʑ΍͍ͬͯΔɻ
    20
    

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21. © Works Applications Co.,Ltd.
    #ccc_f3
    HUEͷ࣮૷Λࢧ͑Δਓ
    ✤ ඇৗʹଟ࠼Ͱ௕ॴ΋ଟ͍
    ✤ ౦ژɾେࡕɾνΣϯφΠɾ্ւɾγϯΨϙʔϧͳͲʹ

    ։ൃڌ఺͕෼ࢄ͍ͯ͠Δ
    ✤ ڭҭϨϕϧ΍ৗ͔ࣝΒͯ͠ҧ͏
    ✤ ϑϩϯτΤϯυɺϑϨʔϜϫʔΫɺϞόΠϧɺػցֶशɺ

    όονɺ෼ࢄॲཧͱ͍༷ͬͨʑͳઐ໳Ո͕ڞଘ
    ✤ εΩϧͷͳ͍৽ਓ͕૿͑ଓ͚͍ͯΔঢ়ଶ
    21
    

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22. © Works Applications Co.,Ltd.
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    HUEͷ࣮૷Λࢧ͑Δਓ
    ✤ ඇৗʹଟ࠼Ͱ௕ॴ΋ଟ͍
    ✤ ౦ژɾେࡕɾνΣϯφΠɾ্ւɾγϯΨϙʔϧͳͲʹ

    ։ൃڌ఺͕෼ࢄ͍ͯ͠Δ
    ✤ ڭҭϨϕϧ΍ৗ͔ࣝΒͯ͠ҧ͏
    ✤ ϑϩϯτΤϯυɺϑϨʔϜϫʔΫɺϞόΠϧɺػցֶशɺ

    όονɺ෼ࢄॲཧͱ͍༷ͬͨʑͳઐ໳Ո͕ڞଘ
    ✤ εΩϧͷͳ͍৽ਓ͕૿͑ଓ͚͍ͯΔঢ়ଶ
    22
    ໰ɿ
    ߴ଎ʹ૿͍͑ͯ͘
    ։ൃऀͷΩϟονΞοϓΛ
    গͳ͍ίϛϡχέʔγϣϯͰ
    ͲͷΑ͏ʹॿ͚Δ͔ʁ
    

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23. © Works Applications Co.,Ltd.
    #ccc_f3
    ͳͥSpotBugs͔
    ✤ ࣾ಺ͷਓࡐͱࢿ࢈
    ✤ ಺෦࣮૷ʹ໌Δ͍ෳ਺ͷ։ൃऀ
    ✤ ϓϥάΠϯ࣮૷ܦݧͷ஝ੵ
    ✤ Eclipse࿈ܞ
    ✤ HUE͸EclipseΛඪ४IDEͱ͍ͯ͠Δ
    ✤ Java8αϙʔτ
    ✤ FindBugs 3.0.1͸Lambdaͷѻ͍ʹ

    ໰୊͕͋Δ
    23
    

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24. © Works Applications Co.,Ltd.
    #ccc_f3
    Agenda
    ‣ ࣗݾ঺հ
    ‣ 2017೥5݄ݱࡏͷJava੩తղੳπʔϧػೳɾಈ޲ൺֱ
    ‣ େن໛ERPͷίʔυ඼๊࣭͕͑Δ໰୊ͱͦͷղܾ
    ‣ ։ൃ͍ͯ͠Δ૊৫ͱͦͷ੡඼
    ‣ ߦ͍ͬͯΔ޻෉ͱࠓޙͷల๬
    24
    

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25. © Works Applications Co.,Ltd.
    #ccc_f3
    3. HUE͕ߦ͍ͬͯΔ޻෉ͱ
    ࠓޙͷల๬
    25
    

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26. © Works Applications Co.,Ltd.
    #ccc_f3
    աڈͷࣦഊ
    ✤ σϑΥϧτઃఆͷ··FindBugs΍CheckstyleΛ

    ϩʔΧϧϏϧυ΍ϓϨϚʔδϏϧυʹಋೖ͠ɺ

    ੜ࢈ੑΛେ͖͘Լ͛ͨ
    ✤ ϓϨϚʔδϏϧυ͕1͔͔࣌ؒۙͬͯ͘͠·ͬͨ
    ✤ mvn -Dfindbugs.skip ΍ true

    ͕౰ͨΓલʹͳͬͯ͠·ͬͨ
    26
    

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27. © Works Applications Co.,Ltd.
    #ccc_f3
    աڈͷࣦഊ
    ✤ σϑΥϧτઃఆͷ··FindBugsΛEclipseʹಋೖ͠ɺ

    ੜ࢈ੑΛେ͖͘Լ͛ͨ
    ✤ ϫʔΫεϖʔεʹ10Λ௒͑ΔϓϩδΣΫτΛৗ࣌༻
    ҙͯ͠։ൃ͢Δਓ͕ଟ͔ͬͨ
    ✤ Eclipse PluginʹύϑΥʔϚϯε্ͷ͕ܽؕ͋ͬͨ
    27
    

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28. © Works Applications Co.,Ltd.
    #ccc_f3
    ͦ΋ͦ΋ɺ
    ✤ MSAΛ໨ࢦ͍ͯ͠Δͷʹ૊৫ԣஅͳղੳ͸ඞཁ͔ʁ
    ✤ ֤αʔϏε։ൃऀ͕޷͖ʹ΍Ε͹͍͍ͷͰ͸ʁ
    ✤ ࣏ࣗͰ͖Δ׆ಈΛ։ൃޮ཰Λ௿Լͤͯ͞·Ͱ

    ԣஅతʹ΍Δʁ
    28
    

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29. © Works Applications Co.,Ltd.
    #ccc_f3
    MSAͰ૊৫ԣஅͳղੳ͸ඞཁ͔ʁ
    ✤ ඞཁ
    ✤ ੩తղੳ͸nice to haveͰ͸ͳ͘must to have
    ✤ ͦΕͧΕҟͳΔਓࡐɾ޻਺Λ͍࣋ͬͯΔͷͰ

    ׬શʹ࣏ࣗʹ೚ͤΔͱ͍࣮ͭࢪ͞ΕΔͷ͔ෆ໌ྎ
    ✤ ։ൃޮ཰ΛԼ͛ͳ͍ํ๏Λ୳͢ඞཁ͕͋Δ
    29
    

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30. © Works Applications Co.,Ltd.
    #ccc_f3
    ༏ઌ౓
    ໢ཏੑ
    ʢϝϦοτʣ
    ࣦഊΛ౿·͑ͯ
    ✤ ։ൃޮ཰ʹଥڠ͠ͳ͍
    ✤ ۃྗ։ൃऀͷ೔ৗۀ຿Λ

    ϒϩοΫ͠ͳ͍ख๏Λ୳͢
    ✤ ޮ཰௿ԼΛೲಘͤ͞ΒΕΔ

    Ձ஋Λग़͢
    ✤ ͪΌΜͱத਎Λཧղͯ͠࢖͏
    ✤ ݁ہ͸όονϓϩάϥϜͳͷͰ

    ׳Εͨख๏ͰϓϩϑΝΠϧՄೳ
    ։ൃޮ཰
    ʢೲಘʣ
    30
    

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31. © Works Applications Co.,Ltd.
    #ccc_f3
    ௐࠪɿͳͥFindBugs͸஗͍ͷ͔ʁ
    ✤ 10਺೥લͷৗࣝʹ΋ͱ͍࣮ͮͨ૷ ʢSpotBugs 3.1.0-RC1Ͱղফʣ
    ✤ MapΛ࢖ͬͨ String#intern() ૬౰ͷࣗલॲཧ
    ✤ ListΠϯελϯεΛ࢖͍·Θͨ͢Ίͷܭࢉॲཧ
    ✤ Eclipse GUIΛසൟʹߋ৽͗͢͠Δ ʢSpotBugs 3.1.0-RC2Ͱղফʣ
    ✤ ղੳର৅͕มΘΔͨͼʹUIΛߋ৽
    ✤ γϯάϧεϨουʢίΞΛ࢖͍੾Εͳ͍ʣ
    31
    

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32. © Works Applications Co.,Ltd.
    #ccc_f3
    ௐࠪɿ؀ڥมߋͰߴ଎ԽͰ͖Δʁ
    ✤ ΄΅Ͱ͖ͳ͍
    ✤ FindBugs͸CPU bound͕ͩγϯάϧεϨουͳόον
    ✤ ෳ਺ίΞΛ৯͍੾͍ͬͯΔͷ͸JITίϯύΠϥͷεϨου

    ʢ-XX:CICompilerCountͰ૿ݮՄ͕ͩ଎౓ʹ΄΅د༩ͳ͠ʣ
    ✤ OOME΍GC stormΛى͜͞ͳ͍ఔ౓ͷϝϞϦΛ༩͑Ε͹

    ͋ͱ͸CPUίΞ૿΍ͯ͠΋ϝϞϦ૿΍ͯ͠΋มԽͳ͠
    32
    

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33. © Works Applications Co.,Ltd.
    #ccc_f3
    ௐࠪɿGuava v19.0ղੳͷϚΠΫϩϕϯν
    ʢ4 CPU coresʣ
    33
    128m 256m 512m 1g
    2

    (Default)
    OOME 18.2s 18.0s 18.2s
    3 OOME 19.2s 18.2s 18.0s
    4 OOME 24.8s 24.7s 23.6s
    -XX:CICompilerCount
    -Xmx & -Xms
    refs: https://github.com/spotbugs/spotbugs/pull/128
    

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34. © Works Applications Co.,Ltd.
    #ccc_f3
    ௐࠪɿGuava v19.0ղੳͷϚΠΫϩϕϯν
    ʢ2 CPU coresʣ
    34
    2g
    Default 26.0s
    G1GC 28.7s
    G1GC
    +
    UseStringDeduplication
    29.1s
    GCઃఆʢJava8ʣ
    -Xmx & -Xms
    refs: https://github.com/spotbugs/spotbugs/pull/128
    

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35. © Works Applications Co.,Ltd.
    #ccc_f3
    ௐࠪɿઃఆͰfindbugs-maven-pluginΛ
    ߴ଎Խ͢Δʹ͸
    ✤ onlyAnalyzeͰର৅ΫϥεΛ࡟Γɺ

    visitorsͰར༻DetectorΛ࡟Δ͜ͱͰߴ଎ʹͳΔ
    ✤ ൃݟ͍ͨ͠όάʹ༏ઌ౓Λ͚ͭΔ͜ͱ͕؊ཁ
    ✤ ExcludeFilterͰର৅ϑΝΠϧΛ࡟ͬͯ΋଎͘ͳΒͳ͍
    ✤ Filter͸ॲཧͷ݁Ռʹରͯ͠Өڹ͢ΔͨΊ
    35
    

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36. © Works Applications Co.,Ltd.
    #ccc_f3
    Ҏ্Λ౿·͑ͯ
    36
    

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37. © Works Applications Co.,Ltd.
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    ํ਑
    ✤ ଎౓ॏࢹͷૈ͍ղੳͱɺ໢ཏੑॏࢹͷղੳΛ૊Έ߹Θ
    ͤΔ
    ✤ ϓϨϚʔδϏϧυͰ͸มߋ͞ΕͨΫϥε͚ͩΛղੳ
    ✤ र͍࿙ΕΔ໰୊͸೔࣍ͷղੳͰൃݟɾใࠂ
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38. © Works Applications Co.,Ltd.
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    ॏ͘໢ཏੑͷߴ͍ղੳʢ֓ཁʣ
    ✤ Jenkins + SonarQubeͰ։ൃ͕׆ൃͰͳ͍࣌ؒଳʹ࣮ࢪ
    ✤ ॏେͰͳ͍Ϩϕϧͷϧʔϧ΋ؚΊ࣮ͯࢪ
    ✤ ։ൃऀ͕͍ͭͰ΋ΞΫηεͰ͖ΔSonarQubeΛఏڙ
    ✤ Readme΍ϓϩδΣΫτҰཡϖʔδʹBadgeΛදࣔ͠

    ҰཡੑͱSonarQube΁ͷಋઢΛ֬อ
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39. © Works Applications Co.,Ltd.
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    ॏ͘໢ཏੑͷߴ͍ղੳʢ݁Ռʣ
    ✤ 50ͷϓϩδΣΫτ͔Β3,000ͷ໰୊Λݟ͚ͭɺ

    1ϲ݄Ͱ͏ͪ900Λղফͨ͠
    ✤ String.format() ΍ logger.info() ͷϑΥʔϚοτҟৗ
    ✤ ϚϧνεϨουϓϩάϥϛϯάΞϯνύλʔϯ
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40. © Works Applications Co.,Ltd.
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    ૉૣ͘ૈ͍ղੳʢ֓ཁʣ
    ✤ ॏେͳ໰୊Λத৺ʹௐࠪ
    ✤ ಠࣗMavenϓϥάΠϯͰfindbugs-maven-pluginΛ
    ϥοϓ
    ✤ มߋ͞Εͨ.javaϑΝΠϧҰཡ͔Βߋ৽͞ΕͨՄೳੑ
    ͷ͋ΔclassϑΝΠϧͷҰཡΛSpotBugsʹ౉͢
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    ૉૣ͘ૈ͍ղੳʢ݁Ռʣ
    ✤ SpotBugsʹ͔͔Δ࣌ؒΛฏۉ93ˋ࡟ݮ
    ✤ େ͖ͳϦϙδτϦͰ΋1෼Ҏ಺ʹղੳΛऴ͑ΒΕΔ

    ✤ र͍͖Εͳ͍໰୊͸ඞͣग़Δ
    ✤ ྫɿˏNonNullΛΠϯλϑΣʔεʹ௥Ճͨ͠৔߹
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    ࠓޙͷల๬
    ✤ ͞Βʹଟ͘ͷϦϙδτϦ΁ͷಋೖ
    ✤ Type AnnotationΛஈ֊తʹಋೖ͢Δ
    ✤ ٕज़ʹͩ͜ΘΓͷڧ͍ɺڞ௨Ϟδϡʔϧ։ൃऀʹ

    ڠྗΛґཔ͢Δ
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    4. ࣾ಺FWࢧԉͷͨΊͷ
    SpotBugsϓϥάΠϯ࣮૷ํ๏
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    5. ·ͱΊ
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    େن໛։ൃʹ͓͚Δίʔυ඼࣭վળ
    ✤ ϓϩδΣΫτͷ਺ͱن໛͕େ͖͍MSAͰ͸ӡ༻ͷ

    ೉౓্͕͕Δ
    ✤ ֤αʔϏε։ൃऀ͕੩తղੳπʔϧͷϝϦοτΛ

    ڗडͰ͖Δ؀ڥͷߏங͕ඞཁ
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46. © Works Applications Co.,Ltd.
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    େن໛։ൃʹ͓͚Δίʔυ඼࣭վળ
    ✤ FindBugs/SpotBugsͷΫηΛཧղ͢Ε͹

    େن໛։ൃͰ΋αΫαΫར༻Ͱ͖Δ
    ✤ ύϥϝʔλͷมߋͰ࣮ߦϧʔϧͱର৅ίʔυΛ

    ߜΓࠐΉɺࠩ෼ղੳͱόον࣮ߦΛ෼͚Δ
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47. © Works Applications Co.,Ltd.
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    େن໛։ൃʹ͓͚Δίʔυ඼࣭վળ
    ✤ SpotBugsϓϥάΠϯΛ։ൃ͢Ε͹ࣾ಺ϑϨʔϜϫʔΫ
    ݻ༗ͷ໰୊΋੩తղੳπʔϧͰൃݟͰ͖Δ
    ✤ ࣮૷ʹ͸ඞͣ͠΋JVM΍όΠτίʔυͷ஌ࣝ͸ඞཁ
    ͱ͠ͳ͍
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    6. ࠾༻৘ใ
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49. © Works Applications Co.,Ltd.
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    ੈքΛ໨ࢦ͢ΤϯδχΞΛ
    ืू͍ͯ͠·͢
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    ۩ମతͳ࿩Λฉ͖͍ͨํ΁
    ✤ ൃදޙʹࢲʹฉ͖ʹདྷ͍ͯͩ͘͞ʂ
    ✤ CIɺMSAɺϚΠάϨʔγϣϯɺ։ൃϓϩηεɺ

    ଟڌ఺։ൃ͸ઐ໳ͳͷͰ৭ʑ͓࿩Ͱ͖·͢.
    ✤ ೔ຊۈ຿Ͱ͸ͳ͍ͷͰɺ೔ຊڌ఺ݻ༗ͷ࿩͸

    ͋·Γ౴͑ΒΕͳ͍͔΋͠Ε·ͤΜɻ
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51. © Works Applications Co.,Ltd.
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    Thank you!
    ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ
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    7. ࢀߟࢿྉ
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53. © Works Applications Co.,Ltd.
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    ࢀߟ৘ใ
    ‣ ιʔείʔυͷ඼࣭޲্ͷͨΊͷޮՌతͰޮ཰తͳ

    ίʔυϨϏϡʔ
    ‣ https://www.slideshare.net/MoriharuOhzu/
    ss-9224836
    53
    

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54. © Works Applications Co.,Ltd.
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    ࢀߟ৘ใ
    ‣ ϥϜμࣜ΍ετϦʔϜ API ΍৽͍͠೔࣌ API ͚ͩ
    ͡Όͳ͍ʂ

    Java8 ͷλΠϓɾΞϊςʔγϣϯ͋ͷख͜ͷख
    ‣ http://waman.hatenablog.com/entry/
    2014/05/08/063959
    54
    

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55. © Works Applications Co.,Ltd.
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    ࢀߟ৘ใ
    ‣ Type Annotation for Static Program Analysis
    ‣ https://www.slideshare.net/skrb/type-annotation-
    for-static-program-analysis
    55
    

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56. © Works Applications Co.,Ltd.
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    ࢀߟ৘ใ
    ✤ G1: from garbage collector to waste management
    consultant
    ✤ https://blogs.oracle.com/java-platform-group/
    g1%3a-from-garbage-collector-to-waste-
    management-consultant
    56
    

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57. © Works Applications Co.,Ltd.
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    ࢀߟ৘ใ
    ✤ G1 GC ͓͞Β͍ͱ #jjug_ccc Ͱൃදͨ͠࿩
    ✤ http://cco.hatenablog.jp/entry/
    2015/12/01/011223
    57
    

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58. © Works Applications Co.,Ltd.
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    ࢀߟ৘ใ
    ✤ The Google FindBugs fixit
    ✤ http://dl.acm.org/citation.cfm?id=1831738
    58
    

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