JJUG_CCC_2017_Spring_to_upload.pdf

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1. © Works Applications Co.,Ltd. #ccc_f3 2017 May/20th, JJUG CCC 2017 Spring SpotBugs(FindBugs)ʹΑΔ େن໛ERPͷίʔυ඼࣭վળ 1
2. © Works Applications Co.,Ltd. #ccc_f3 Agenda ‣ ࣗݾ঺հ ‣ 2017೥5݄ݱࡏͷJava੩తղੳπʔϧػೳɾಈ޲ൺֱ ‣ େن໛ERPͷίʔυ඼๊࣭͕͑Δ໰୊ͱͦͷղܾ ‣ ։ൃ͍ͯ͠Δ૊৫ͱͦͷ੡඼ ‣ ߦ͍ͬͯΔ޻෉ͱࠓޙͷల๬ 2
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
4. © Works Applications Co.,Ltd. #ccc_f3 ಥવͷQuiz 4
5. © Works Applications Co.,Ltd. #ccc_f3 JJUG CCCͷCCCͱ͸ʁ 1. ΫϥεɾνϣοτɾίϯύΠϧσΩϧ 2. ௒ɾίʔσΟϯάɾίϯςετ 3. ΫϩεɾίϛϡχςΟɾΧϯϑΝϨϯε 5
6. © Works Applications Co.,Ltd. #ccc_f3 ࣗݾ঺հ ✤ https://github.com/ KengoTODA/ ✤ ᷂ϫʔΫεΞϓϦέʔγϣϯζ
 ݚڀ։ൃΤϯδχΞ ✤ ήʔϜ͕࡞Γͨͯ͘HSP2ʹ
 खΛग़͠ɺϑϦʔιϑτ΢ΣΞ ࡞ՈΛܦͯɺೖࣾ͠R&Dʹ ✤ SpotBugsͷதͷਓ JVM Simulator Maven3 ebook 6
7. © Works Applications Co.,Ltd. #ccc_f3 1. 2017೥5݄ݱࡏͷ
 Java੩తղੳπʔϧػೳɾಈ޲ൺֱ 7
8. © Works Applications Co.,Ltd. #ccc_f3 ੩తղੳπʔϧͷྑ͍ͱ͜Ζ ✤ ࢖͍खʹܦݧ΍ਂ͍஌͕ࣝͳͯ͘΋ɺ ✤ ϨϏϡʔલ΍σϓϩΠલͳͲૣ͍ஈ֊Ͱɺ ✤ ໰୊ΛൃݟͰ͖Δ 8
9. © Works Applications Co.,Ltd. #ccc_f3 ൺֱର৅Java੩తղੳπʔϧ ‣ Checkstyle ‣ PMD ‣ FindBugs / SpotBugs ‣ Checker Framework ‣ Google error-prone 9
10. © Works Applications Co.,Ltd. #ccc_f3 Checkstyle ‣ ιʔείʔυղੳͳͷͰίϯύΠϧͳ͠Ͱ࣮ߦͰ͖Δ ‣ ଟ࠼ͳIDEɾϏϧυπʔϧʹରԠ ‣ ίʔσΟϯάن໿ͷ֬ೝ͕ओ໨త ‣ ϓϥάΠϯ࣮૷ʹඞཁͳ஌͕ࣝগͳ͍ ‣ http://checkstyle.sourceforge.net/ 10
11. © Works Applications Co.,Ltd. #ccc_f3 PMD ‣ ιʔείʔυղੳͳͷͰίϯύΠϧͳ͠Ͱ࣮ߦͰ͖Δ ‣ ଟ࠼ͳIDEɾϏϧυπʔϧͦͯ͠ݴޠʹରԠ ‣ CPDʢίϐϖݕग़ʣػೳ΋౥ࡌ ‣ ϓϥάΠϯ࣮૷͸ΘΓͱෳࡶ ‣ https://pmd.github.io/ 11
12. © Works Applications Co.,Ltd. #ccc_f3 FindBugs ‣ όΠτίʔυղੳͳͷͰίʔυʹͳ͍৘ใʢ਌Ϋϥεɺ
 ґଘઌɺΞϊςʔγϣϯ౳ʣ΋CLASSPATH͔Βิ׬Ͱ͖Δ ‣ ଟ࠼ͳIDEɾϏϧυπʔϧʹରԠ ‣ ϓϥάΠϯ࣮૷ʹ͸JVM΍όΠτίʔυͷ஌͕ࣝ͋Δͱྑ ͍ ‣ https://spotbugs.github.io/ 12
13. © Works Applications Co.,Ltd. #ccc_f3 SpotBugsͱ͸ʁ ‣ FindBugsͷ։ൃ͕͠͹Β͘ࢭ·͍ͬͯͨʢ3.0.1͸2೥ ऑલͷϦϦʔεʣ ‣ 3.1.0ϦϦʔε४උˍίϛϡχςΟܗ੒த ✤ FindBugsίϛϡχςΟʹ͓͚Δྫͷ݅ͷహ຤ɺͦ͠ ͯSpotBugsͱ͸Կ͔ 13
14. © Works Applications Co.,Ltd. #ccc_f3 ࢀߟɿJSR305Ξϊςʔγϣϯͷࠓ ‣ javax.annotation ύοέʔδʹؚ·ΕΔ
 ˏNonnull ΍ˏUntaintedͳͲͷΞϊςʔγϣϯ ‣ JSR305͕Dormantͱͳͬͨޙ΋FindBugs͕഑෍͍ͯͨ͠ ‣ SpotBugsʹΑΔϝϯςφϯε༧ఆແ͠ ‣ ܕύϥϝʔλʹ࢖͏͜ͱ΋Ͱ͖ͳ͍ͷͰ
 ࠓޙԺ΍͔ʹஔ͖׵͑ΒΕ͍ͯ͘ͷͰ͸ 14
15. © Works Applications Co.,Ltd. #ccc_f3 Checker Framework ‣ Java8ͷJSR 308 (Annotations on Java Types) Λར༻͢Δ ‣ ଟ࠼ͳIDEɾϏϧυπʔϧʹରԠ ‣ JDKʹؚ·ΕΔΫϥεͷৼΔ෣͍Λσʔλϕʔεʹ࣋ͭ ‣ https://checkerframework.org/ 15
16. © Works Applications Co.,Ltd. #ccc_f3 Google error-prone ‣ ίϯύΠϧ࣌ʹղੳ͢ΔͷͰίʔυʹͳ͍৘ใ΋र͍΍͍͢ ‣ ιʔείʔυͷࣗಈमਖ਼Λ౰ॳ͔Βҙ͍ࣝͯ͠Δʁ ‣ EclipseඇରԠʢcom.sun.* ύοέʔδʹґଘͷͨΊʣ ‣ ৭ʑϞμϯͰϓϥάΠϯ࣮૷΋͠΍͍͢ ‣ GoogleࣾһҎ֎͔ΒͷPR͸ʢ࣮੷ͱͯ͠ʣड͚෇͚ͯͳ͍ ‣ http://errorprone.info/ 16 Refs: http://dl.acm.org/citation.cfm?id=2486877
17. © Works Applications Co.,Ltd. #ccc_f3 ࠓ࢖͏ͳΒͲͷπʔϧʁ 17 ʘ Target Standard Rules Note Checkstyle 7.7 AST 152 checks codingن໿ PMD 5.6.1 AST 287 rules (PMD Java) ଟݴޠରԠ SpotBugs 3.1.0−RC2 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଴
18. © Works Applications Co.,Ltd. #ccc_f3 ࠓ࢖͏ͳΒͲͷπʔϧʁ ‣ ͱʹ͔͘਺Λग़͍ͨ͠ ‣ SpotBugs + Checker Framework ‣ Type AnnotationΛ࢖͑͹SpotBugsʹݟ͚ͭΒΕͳ͍໰୊΋
 ᖰΓग़ͤΔՄೳੑ͕͋Δ ‣ ղੳʹ࣌ؒΛ͔͚ͨ͘ͳ͍ ‣ error-proneͰίϯύΠϧ࣌νΣοΫ ‣ PMDΛίϯύΠϥͱฒྻ࣮ߦ 18
19. © 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๷͙ 19
20. © Works Applications Co.,Ltd. #ccc_f3 Agenda ‣ ࣗݾ঺հ ‣ 2017೥5݄ݱࡏͷJava੩తղੳπʔϧػೳɾಈ޲ൺֱ ‣ େن໛ERPͷίʔυ඼๊࣭͕͑Δ໰୊ͱͦͷղܾ ‣ ։ൃ͍ͯ͠Δ૊৫ͱͦͷ੡඼ ‣ ߦ͍ͬͯΔ޻෉ͱࠓޙͷల๬ 20
21. © Works Applications Co.,Ltd. #ccc_f3 2. େن໛ERPͷίʔυ඼࣭͕ ๊͑Δ໰୊ 21
22. © Works Applications Co.,Ltd. #ccc_f3 גࣜձࣾ ϫʔΫεΞϓϦέʔγϣϯζͱ͸ ✤ ERPύοέʔδͷ։ൃΛߦ͍ͬͯΔاۀ ✤ γϯΨϙʔϧɺதࠃɺΠϯυɺΞϝϦΧ౳ʹ΋ڌ఺ ✤ ίϯγϡʔϚΞϓϦͷΑ͏ͳϢʔβϏϦςΟͱ
 εϐʔυΛ࣋ͭERPʮHUEʢAI WorksʣʯΛ
 ։ൃɾఏڙ 22
23. © Works Applications Co.,Ltd. #ccc_f3 HUEͷ࣮૷ ✤ ୤RDB͢ΔͳͲ଎౓ʹͩ͜Θ͍ͬͯͯɺ ✤ MSA͠ͳ͍ͱࢮ͵ఔ౓ʹ͸ࢁ΄ͲαʔϏε͕͋Γɺ ✤ ಙౡʹݚڀॴ࡞ΔϨϕϧͰࣗવݴޠॲཧʹຊؾͰɺ ✤ 100msୡ੒ͷͨΊʹAWS LambdaΛಋೖ͢ΔͳͲ
 ৽͍͜͠ͱ΋৭ʑ΍͍ͬͯΔɻ 23
24. © Works Applications Co.,Ltd. #ccc_f3 HUEͷ࣮૷Λࢧ͑Δਓ ✤ ඇৗʹଟ࠼Ͱ௕ॴ΋ଟ͍ ✤ ౦ژɾେࡕɾνΣϯφΠɾ্ւɾγϯΨϙʔϧͳͲʹ
 ։ൃڌ఺͕෼ࢄ͍ͯ͠Δ ✤ ड͚ͨڭҭ΍ৗ͔ࣝΒͯ͠େ͖͘ҧ͏ ✤ ϑϩϯτΤϯυɺϑϨʔϜϫʔΫɺϞόΠϧɺػցֶशɺ
 όονɺ෼ࢄॲཧͱ͍༷ͬͨʑͳઐ໳Ո͕ڞଘ ✤ εΩϧͷͳ͍৽ਓ͕૿͑ଓ͚͍ͯΔঢ়ଶ 24
25. © Works Applications Co.,Ltd. #ccc_f3 HUEͷ࣮૷Λࢧ͑Δਓ ✤ ඇৗʹଟ࠼Ͱ௕ॴ΋ଟ͍ ✤ ౦ژɾେࡕɾνΣϯφΠɾ্ւɾγϯΨϙʔϧͳͲʹ
 ։ൃڌ఺͕෼ࢄ͍ͯ͠Δ ✤ ड͚ͨڭҭ΍ৗ͔ࣝΒͯ͠େ͖͘ҧ͏ ✤ ϑϩϯτΤϯυɺϑϨʔϜϫʔΫɺϞόΠϧɺػցֶशɺ
 όονɺ෼ࢄॲཧͱ͍༷ͬͨʑͳઐ໳Ո͕ڞଘ ✤ εΩϧͷͳ͍৽ਓ͕૿͑ଓ͚͍ͯΔঢ়ଶ 25 ໰ɿ ߴ଎ʹ૿͍͑ͯ͘ ։ൃऀͷΩϟονΞοϓΛ গͳ͍ίϛϡχέʔγϣϯͰ ͲͷΑ͏ʹॿ͚Δ͔ʁ
26. © Works Applications Co.,Ltd. #ccc_f3 ͳͥSpotBugs͔ ✤ ࣾ಺ͷਓࡐͱࢿ࢈ ✤ ಺෦࣮૷ʹ໌Δ͍ෳ਺ͷ։ൃऀ ✤ ϓϥάΠϯ࣮૷ܦݧͷ஝ੵ ✤ Eclipse࿈ܞ ✤ HUE͸EclipseΛඪ४IDEͱ͍ͯ͠Δ ✤ Java8αϙʔτ ✤ FindBugs 3.0.1͸Lambdaͷѻ͍ʹ
 ໰୊͕͋Δ 26
27. © Works Applications Co.,Ltd. #ccc_f3 Agenda ‣ ࣗݾ঺հ ‣ 2017೥5݄ݱࡏͷJava੩తղੳπʔϧػೳɾಈ޲ൺֱ ‣ େن໛ERPͷίʔυ඼๊࣭͕͑Δ໰୊ͱͦͷղܾ ‣ ։ൃ͍ͯ͠Δ૊৫ͱͦͷ੡඼ ‣ ߦ͍ͬͯΔ޻෉ͱࠓޙͷల๬ 27
28. © Works Applications Co.,Ltd. #ccc_f3 3. HUE͕ߦ͍ͬͯΔ޻෉ͱ ࠓޙͷల๬ 28
29. © Works Applications Co.,Ltd. #ccc_f3 աڈͷࣦഊ ✤ σϑΥϧτઃఆͷ··FindBugs΍CheckstyleΛ
 ϩʔΧϧϏϧυ΍ϓϨϚʔδϏϧυʹಋೖ͠ɺ
 ੜ࢈ੑΛେ͖͘Լ͛ͨ ✤ ϓϨϚʔδϏϧυ͕1͔͔࣌ؒۙͬͯ͘͠·ͬͨ ✤ mvn -Dfindbugs.skip ΍ <findbugs.skip>true
 </findbugs.skip> ͕౰ͨΓલʹͳͬͯ͠·ͬͨ 29
30. © Works Applications Co.,Ltd. #ccc_f3 աڈͷࣦഊ ✤ σϑΥϧτઃఆͷ··FindBugsΛEclipseʹಋೖ͠ɺ
 ੜ࢈ੑΛେ͖͘Լ͛ͨ ✤ ϫʔΫεϖʔεʹ10Λ௒͑ΔϓϩδΣΫτΛৗ࣌༻ ҙͯ͠։ൃ͢Δਓ͕ଟ͔ͬͨ ✤ Eclipse PluginʹύϑΥʔϚϯε্ͷ͕ܽؕ͋ͬͨ 30
31. © Works Applications Co.,Ltd. #ccc_f3 ͦ΋ͦ΋ɺ ✤ MSAΛ໨ࢦ͍ͯ͠Δͷʹ૊৫ԣஅͳղੳ͸ඞཁ͔ʁ ✤ ֤αʔϏε։ൃऀ͕޷͖ʹ΍Ε͹͍͍ͷͰ͸ʁ ✤ ࣏ࣗͰ͖Δ׆ಈΛ։ൃޮ཰Λ௿Լͤͯ͞·Ͱ
 ԣஅతʹ΍Δʁ 31
32. © Works Applications Co.,Ltd. #ccc_f3 MSAͰ૊৫ԣஅͳղੳ͸ඞཁ͔ʁ ✤ ඞཁ ✤ ੩తղੳ͸nice to haveͰ͸ͳ͘must to have ✤ ͦΕͧΕҟͳΔਓࡐɾ޻਺Λ͍࣋ͬͯΔͷͰ
 ׬શʹ࣏ࣗʹ೚ͤΔͱ͍࣮ͭࢪ͞ΕΔͷ͔ෆ໌ྎ ✤ ։ൃޮ཰ΛԼ͛ͳ͍ํ๏Λ୳͢ඞཁ͕͋Δ 32
33. © 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 33
34. © 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 34
35. © 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 35
36. © Works Applications Co.,Ltd. #ccc_f3 ௐࠪɿGuava v19.0ղੳͷϚΠΫϩϕϯν ʢ4 CPU coresʣ 36 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
37. © Works Applications Co.,Ltd. #ccc_f3 ௐࠪɿGuava v19.0ղੳͷϚΠΫϩϕϯν ʢ2 CPU coresʣ 37 2g Default 26.0s G1GC 28.7s G1GC + UseStringDeduplication 29.1s GCઃఆʢJava8ʣ -Xmx & -Xms refs: https://github.com/spotbugs/spotbugs/pull/128
38. © 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 38
39. © Works Applications Co.,Ltd. #ccc_f3 ௐࠪɿeffortͷޮՌʢTBUʣ 39 ACCUR ATE_EX CEPTIO NS MODEL _INSTA NCEOF TRACK _GUAR ANTEE D_VAL UE_DER EFS_IN_ NULL_P OINTER _ANAL YSIS TRACK _VALUE _NUMB ERS_IN_ NULL_P OINTER _ANAL YSIS INTERP ROCED URAL_ ANALY SIS INTERP ROCED URAL_ ANALY SIS_OF_ REFERE NCED_ CLASSE S CONSE RVE_SP ACE SKIP_ HUGE _MET HODS min ✓ ✓ less ✓ ✓ ✓ default, more ✓ ✓ ✓ ✓ ✓ ✓ max ✓ ✓ ✓ ✓ ✓ ✓ Refs: FindBugs.java
40. © Works Applications Co.,Ltd. #ccc_f3 Ҏ্Λ౿·͑ͯ 40
41. © Works Applications Co.,Ltd. #ccc_f3 ํ਑ ✤ ଎౓ॏࢹͷૈ͍ղੳͱɺ໢ཏੑॏࢹͷղੳΛ૊Έ߹Θ ͤΔ ✤ ϓϨϚʔδϏϧυͰ͸มߋ͞ΕͨΫϥε͚ͩΛղੳ ✤ र͍࿙ΕΔ໰୊͸೔࣍ͷղੳͰൃݟɾใࠂ 41
42. © Works Applications Co.,Ltd. #ccc_f3 ॏ͘໢ཏੑͷߴ͍ղੳʢ֓ཁʣ ✤ Jenkins + SonarQubeͰ։ൃ͕׆ൃͰͳ͍࣌ؒଳʹ࣮ࢪ ✤ ॏେͰͳ͍Ϩϕϧͷϧʔϧ΋ؚΊ࣮ͯࢪ ✤ ։ൃऀ͕͍ͭͰ΋ΞΫηεͰ͖ΔSonarQubeΛఏڙ ✤ Readme΍ϓϩδΣΫτҰཡϖʔδʹBadgeΛදࣔ͠
 ҰཡੑͱSonarQube΁ͷಋઢΛ֬อ 42
43. © Works Applications Co.,Ltd. #ccc_f3 ॏ͘໢ཏੑͷߴ͍ղੳʢ݁Ռʣ ✤ 50ͷϓϩδΣΫτ͔Β3,000ͷ໰୊Λݟ͚ͭɺ
 1ϲ݄Ͱ͏ͪ900Λղফͨ͠ ✤ String.format() ΍ logger.info() ͷϑΥʔϚοτҟৗ ✤ ϚϧνεϨουϓϩάϥϛϯάΞϯνύλʔϯ 43
44. © Works Applications Co.,Ltd. #ccc_f3 ૉૣ͘ૈ͍ղੳʢ֓ཁʣ ✤ ॏେͳ໰୊Λத৺ʹௐࠪ ✤ ಠࣗMavenϓϥάΠϯͰfindbugs-maven-pluginΛ ϥοϓ ✤ มߋ͞Εͨ.javaϑΝΠϧҰཡ͔Βߋ৽͞ΕͨՄೳੑ ͷ͋ΔclassϑΝΠϧͷҰཡΛSpotBugsʹ౉͢ 44
45. © Works Applications Co.,Ltd. #ccc_f3 ૉૣ͘ૈ͍ղੳʢ݁Ռʣ ✤ SpotBugsʹ͔͔Δ࣌ؒΛฏۉ93ˋ࡟ݮ ✤ େ͖ͳϦϙδτϦͰ΋1෼Ҏ಺ʹղੳΛऴ͑ΒΕΔ
 ✤ र͍͖Εͳ͍໰୊͸ඞͣग़Δ ✤ ྫɿˏNonNullΛΠϯλϑΣʔεʹ௥Ճͨ͠৔߹ 45
46. © Works Applications Co.,Ltd. #ccc_f3 ࠓޙͷల๬ ✤ ͞Βʹଟ͘ͷϦϙδτϦ΁ͷಋೖ ✤ Type AnnotationΛஈ֊తʹಋೖ͢Δ ✤ ٕज़ʹͩ͜ΘΓͷڧ͍ɺڞ௨Ϟδϡʔϧ։ൃऀʹ
 ڠྗΛґཔ͢Δ 46
47. © Works Applications Co.,Ltd. #ccc_f3 4. ࣾ಺FWࢧԉͷͨΊͷ SpotBugsϓϥάΠϯ࣮૷ํ๏ 47
48. © Works Applications Co.,Ltd. #ccc_f3 େ·͔ͳྲྀΕ ✤ ཁ݅ͷ໌֬Խ ✤ ϓϩδΣΫτͷ࡞੒ ✤ JUnitͰՔಇ֬ೝ͠ͳ͕Β࣮૷ ✤ Messageͷ࡞੒ 48
49. © Works Applications Co.,Ltd. #ccc_f3 ཁ݅ͷ໌֬Խ 49 ✤ ཁ݅ʹԠ֦ͯ͡ு͢΂͖਌Ϋϥε͕มΘΔ ✤ OperandStackͷঢ়ଶΛ௥͏ˠOpcodeStackDetector ✤ ΞϊςʔγϣϯΛ֬ೝ͢ΔˠAnnotationDetector
50. © Works Applications Co.,Ltd. #ccc_f3 ϓϩδΣΫτͷ࡞੒ 50 $ mvn archetype:generate \ -DarchetypeGroupId=com.github.spotbugs \ -DarchetypeArtifactId=spotbugs-archetype \ -DarchetypeVersion=0.1.0 Refs: https://github.com/spotbugs/spotbugs-archetype
51. © Works Applications Co.,Ltd. #ccc_f3 JUnitͰಈ࡞֬ೝ͠ͳ͕Β࣮૷ 51 ✤ ʮόάͱͯ͠ݟ͚͍ͭͨঢ়ଶʯΛ࣮૷ ✤ ʮόάͱͯ͠ݟ͔ͭΔ΂͖Ͱͳ͍ঢ়ଶʯΛ࣮૷ ✤ classϑΝΠϧΛςετ࣮ߦલʹੜ੒
52. © Works Applications Co.,Ltd. #ccc_f3 52 Refs: https://github.com/spotbugs/spotbugs/tree/master/test-harness
53. © Works Applications Co.,Ltd. #ccc_f3 Messageͷ࡞੒ ✤ src/main/resources/messages.xmlͷվม ✤ ʮԿ͕໰୊͔ʯ͚ͩͰͳ͘ʮͲ͏मਖ਼Ͱ͖Δ͔ʯ΋
 ࢦೆ͢Δ͜ͱ͕๬·͍͠ 53 Refs: http://dl.acm.org/citation.cfm?id=2486877
54. © Works Applications Co.,Ltd. #ccc_f3 Live demo 54
55. © Works Applications Co.,Ltd. #ccc_f3 5. ·ͱΊ 55
56. © Works Applications Co.,Ltd. #ccc_f3 େن໛։ൃʹ͓͚Δίʔυ඼࣭վળ ✤ ϓϩδΣΫτͷ਺ͱن໛͕େ͖͍MSAͰ͸ӡ༻ͷ
 ೉౓্͕͕Δ ✤ ֤αʔϏε։ൃऀ͕੩తղੳπʔϧͷϝϦοτΛ
 ڗडͰ͖Δ؀ڥͷߏங͕ඞཁ 56
57. © Works Applications Co.,Ltd. #ccc_f3 େن໛։ൃʹ͓͚Δίʔυ඼࣭վળ ✤ FindBugs/SpotBugsͷΫηΛཧղ͢Ε͹
 େن໛։ൃͰ΋αΫαΫར༻Ͱ͖Δ ✤ ύϥϝʔλͷมߋͰ࣮ߦϧʔϧͱର৅ίʔυΛ
 ߜΓࠐΉɺࠩ෼ղੳͱόον࣮ߦΛ෼͚Δ 57
58. © Works Applications Co.,Ltd. #ccc_f3 େن໛։ൃʹ͓͚Δίʔυ඼࣭վળ ✤ SpotBugsϓϥάΠϯΛ։ൃ͢Ε͹ࣾ಺ϑϨʔϜϫʔΫ ݻ༗ͷ໰୊΋੩తղੳπʔϧͰൃݟͰ͖Δ ✤ ࣮૷ʹ͸ඞͣ͠΋JVM΍όΠτίʔυͷ஌ࣝ͸ඞཁ ͱ͠ͳ͍ 58
59. © Works Applications Co.,Ltd. #ccc_f3 6. ࠾༻৘ใ 59
60. © Works Applications Co.,Ltd. #ccc_f3 ੈքΛ໨ࢦ͢ΤϯδχΞΛ ืू͍ͯ͠·͢ 60
61. © Works Applications Co.,Ltd. #ccc_f3 ۩ମతͳ࿩Λฉ͖͍ͨํ΁ ✤ ൃදޙʹࢲʹฉ͖ʹདྷ͍ͯͩ͘͞ʂ ✤ CIɺMSAɺϚΠάϨʔγϣϯɺ։ൃϓϩηεɺ
 ଟڌ఺։ൃ͸ઐ໳ͳͷͰ৭ʑ͓࿩Ͱ͖·͢. 61
62. © Works Applications Co.,Ltd. #ccc_f3 Thank you! ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ 62
63. © Works Applications Co.,Ltd. #ccc_f3 7. ࢀߟࢿྉ 63
64. © Works Applications Co.,Ltd. #ccc_f3 ࢀߟ৘ใ ‣ ιʔείʔυͷ඼࣭޲্ͷͨΊͷޮՌతͰޮ཰తͳ
 ίʔυϨϏϡʔ ‣ https://www.slideshare.net/MoriharuOhzu/ ss-9224836 64
65. © Works Applications Co.,Ltd. #ccc_f3 ࢀߟ৘ใ ‣ ϥϜμࣜ΍ετϦʔϜ API ΍৽͍͠೔࣌ API ͚ͩ ͡Όͳ͍ʂ
 Java8 ͷλΠϓɾΞϊςʔγϣϯ͋ͷख͜ͷख ‣ http://waman.hatenablog.com/entry/ 2014/05/08/063959 65
66. © Works Applications Co.,Ltd. #ccc_f3 ࢀߟ৘ใ ‣ Type Annotation for Static Program Analysis ‣ https://www.slideshare.net/skrb/type-annotation- for-static-program-analysis 66
67. © Works Applications Co.,Ltd. #ccc_f3 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 67
68. © Works Applications Co.,Ltd. #ccc_f3 ࢀߟ৘ใ ✤ G1 GC ͓͞Β͍ͱ #jjug_ccc Ͱൃදͨ͠࿩ ✤ http://cco.hatenablog.jp/entry/ 2015/12/01/011223 68
69. © Works Applications Co.,Ltd. #ccc_f3 ࢀߟ৘ใ ✤ The Google FindBugs fixit ✤ http://dl.acm.org/citation.cfm?id=1831738 69