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RxJava学習のベストプラクティスっぽいもの
yagi
March 17, 2015
Technology
21
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RxJava学習のベストプラクティスっぽいもの
yagi
March 17, 2015
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Transcript
3Y+BWBֶशͷϕετϓϥΫςΟεͬΆ͍ͷ 2015/03/17(Ր) ീ
3Y+BWBJTUPPIVHF
4UFQCZTUFQMFBSOJOH
4UFQCZTUFQBQQMJDBUJPO
w ֓೦ w ֓೦ͷ+BWBԽ w ίϨΫγϣϯૢ࡞ w 1SPNJTF w -JGU
w 4VCKFDU 3Y+BWB͜ͷॱͰֶʂʁ
3Y+BWBͱ https://rx.codeplex.com/ https://github.com/ReactiveX/RxJava
w 3FBDUJWF&YUFOTJPOT 3Y ɺ؍ଌՄೳ PCTFSWBCMF ͳγʔέϯεͱ-*/2ελΠϧͷΫ ΤϦԋࢉࢠΛͬͯɺඇಉظͳΠϕϯτϕʔεͷϓ ϩάϥϜΛ߹͢ΔϥΠϒϥϦͰ͢ɻ3YΛ͏ͱɺ ։ൃऀඇಉظσʔλετϦʔϜΛ0CTFSWBCMF Ͱද͠ɺඇಉظσʔλετϦʔϜʹର͢ΔΫΤϦ
ʹ-*/2ԋࢉࢠΛ͍ɺඇಉظετϦʔϜͷฒߦ ੑΛ4DIFEVMFSͰύϥϝλԽ͠·͢ɻ؆୯ʹݴ͑ ɺ3Y 0CTFSWBCMF -*/2 4DIFEVMFSͰ͢ɻ 3Y+BWBͱ http://okapies.hateblo.jp/entry/2015/03/04/031148
w 0CTFSWBCMFͱ࣌ؒUʹྲྀΕΔ4USFBNͰ͋Δ ֓೦
w 0CTFSWBCMFͱ࣌ؒUʹྲྀΕΔ4USFBNͰ͋Δ ֓೦ Event Array Async ͲΕ࣌ؒUʹྲྀΕΔ4USFBNͱͯ͠ߟ͑Δ
w &WFOUϢʔβ͕ૢ࡞ͨ࣌͠ U ͳͲʹൃՐ͢ΔΠϕϯτ w "TZODඇಉظॲཧ͕ྃ U ͨ͠ΒൃՐ͢ΔΠϕϯτ w "SSBZ֤ཁૉͷִؒ
U ͕ݶΓͳ͘ʹ͍ۙΠϕϯτ ֓೦
֓೦ ؔΛద༻ Ͱ͖Δ มɺ߹ɺ࿈݁ɺϑΟϧλɺࠐΈɺಉظɺඇಉظ
֓೦ͷ+BWBԽ
֓೦ͷ+BWBԽ ࣌ؒUΛྲྀΕΔJOUFHFSͷTUSFBN 0CTFSWBCMF *OUFHFS DPVOUFS DSFBUF$PVOUFS
֓೦ͷ+BWBԽ ࣌ؒUΛྲྀΕΔJOUFHFSͷTUSFBN 0CTFSWBCMF *OUFHFS DPVOUFS DSFBUF$PVOUFS 1 2 3 4
֓೦ͷ+BWBԽ ؍ଌ͢Δ DPVOUFSTVCTDSJCF OFX"DUJPO *OUFHFS \ !0WFSSJEF QVCMJDWPJEDBMM *OUFHFSJOUFHFS \ EPTPNFUIJOH
^ ^
֓೦ͷ+BWBԽ ؍ଌ͢Δ DPVOUFSTVCTDSJCF OFX"DUJPO *OUFHFS \ !0WFSSJEF QVCMJDWPJEDBMM *OUFHFSJOUFHFS \ EPTPNFUIJOH
^ ^ 1 2 3 4
֓೦ͷ+BWBԽ ࣌ؒUΛྲྀΕΔ5PVDI&WFOUͷTUSFBN 0CTFSWBCMF 5PVDI&WFOU UPVDIFT WJFXUPVDIFT Down Move Move Up
֓೦ͷ+BWBԽ ؔΛద༻͢Δ 0CTFSWBCMF 5PVDI&WFOU UPVDI&WFOU.PWF UPVDIFTpMUFS OFX'VOD 5PVDI&WFOU #PPMFBO \ !0WFSSJEF QVCMJD#PPMFBODBMM 5PVDI&WFOUUPVDI&WFOU
\ SFUVSOUPVDI&WFOUUZQF .PWF ^ ^ Down Move Move Up Move Move
֓೦ͷ+BWBԽ ؔΛద༻͢Δ 0CTFSWBCMF 4USJOH UPVDI&WFOU-PH UPVDIFTNBQ OFX'VOD 5PVDI&WFOU 4USJOH \ !0WFSSJEF QVCMJD4USJOHDBMM 5PVDI&WFOUUPVDI&WFOU
\ SFUVSOUPVDI&WFOUUP4USJOH ^ ^ Down Move Move Up “Move” “Move” “Down” “Up”
0CTFSWBCMFͷϊϦΘ͔ͬͨɻ ͡Ό͋۩ମతʹԿʹ͏ͷʁ
w 0CTFSWBCMFϦονͳ*UFSBUPSͰ͋Δɻ ίϨΫγϣϯૢ࡞
w 0CTFSWBCMF 3FDJQF SFDJQFT 0CTFSWBCMFGSPN SFDJQF-JTU w 0CTFSWBCMF *OUFHFS DPVOUFS 0CTFSWBCMFSBOHF w
ίϨΫγϣϯΛ0CTFSWBCMFԽ QVCMJDDMBTT999"EBQUFSFYUFOET"SSBZ"EBQUFS 5 \ QVCMJD0CTFSWBCMF 5 JUFNT \ SFUVSO0CTFSWBCMF SBOHF HFU$PVOU NBQ J HFU*UFN J XJOEPX HFU$PVOU UP#MPDLJOH TJOHMF ^ ^
͋ͱԿͰΓ์ 0CTFSWBCMF 3FDJQF IJTUPSZ 0CTFSWBCMFGSPN IJTUPSZ-JTU 0CTFSWBCMF 4USJOH JET IJTUPSZ NBQ OFX'VOD 3FDJQF -POH \ !0WFSSJEF
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͋ͱԿͰΓ์ 0CTFSWBCMF 3FDJQF IJTUPSZ 0CTFSWBCMFGSPN IJTUPSZ-JTU 0CTFSWBCMF 4USJOH JET IJTUPSZ NBQ OFX'VOD 3FDJQF -POH \ !0WFSSJEF
QVCMJD-POHDBMM 3FDJQFSFDJQF \ SFUVSOSFDJQFHFU*E ^ ^ MJNJU SFEVDF OFX'VOD 4USJOH -POH 4USJOH \ !0WFSSJEF QVCMJD4USJOHDBMM 4USJOHT -POHJE \ SFUVSO T OVMM JEUP4USJOH ^ ^ 4USJOHJET4US JETUP#MPDLJOH TJOHMF 3FDJQF -POH ࠷େ݅ l zͰ࿈݁ ΛऔΓग़͢
ίϨΫγϣϯૢ࡞ͰϦεΫֶश w ίϨΫγϣϯૢ࡞ʹద༻ͯ͠ϦεΫͰಋೖɻҰ୴ 3Y+BWBਥԽ࣮ͯ͠গͳ͍ɻ w ౷Ұతͳه๏ΛֶͿɺద༻ՕॴΛݕ౼͢Δ w Մಡੑͷߴ͍3Y+BWBίʔυΛࡧ͢Δ ྫ͑લทͷSFEVDFDPNNPOTMBOHͷ 4USJOH6UJMTKPJOΛͬͨํ͕Α͘ͳ͍ʁͱ͔ͳΜͱ͔
w ςετίʔυॻ͖Ͱࢼ͢ͱΔ
׳Ε͖ͯͨͧɺͬͱ࣮༻ੑΛʂ
w 0CTFSWBCMF1SPNJTFͰ͋Δ 1SPNJTF
1SPNJTFͭͷΛ࣋ͭ 0CTFSWBCMF http://ninjinkun.hatenablog.com/entry/introrxja
4DIFEVMFSͰεϨουΛม͑Δ result Observer 5ISFBE .BJO5ISFBE
&SSPSIBOEMJOH Observer 5ISFBE .BJO5ISFBE
ͭͷΛ࣋ͭ0CTFSWBCMFΛ࡞Δ QVCMJD0CTFSWBCMF 3FDJQF SFDJQF pOBMMPOHSFDJQF*E \ SFUVSO0CTFSWBCMFDSFBUF OFX0CTFSWBCMF0O4VCTDSJCF 3FDJQF \ !0WFSSJEF QVCMJDWPJEDBMM 4VCTDSJCFS
TVQFS3FDJQF TVCTDSJCFS \ USZ\ 3FDJQFSFDJQF MPBE3FDJQF SFDJQF*E TVCTDSJCFSPO/FYU SFDJQF TVCTDSJCFSPO$PNQMFUFE ^DBUDI &YDFQUJPOF \ TVCTDSJCFSPO&SSPS F ^ ^ ^ ^
4DIFEVMFSΛηοτ͢Δ 0CTFSWBCMF 3FDJQF SFDJQF0CTFSWBCMF SFDJQF JE SFDJQF0CTFSWBCMF TVCTDSJCF0O 4DIFEVMFSTJP PCTFSWF0O "OESPJE4DIFEVMFSTNBJO5ISFBE
0CTFSWBCMFͷॲཧεϨου 0CTFSWFSͷॲཧεϨου ˞"OESPJE4DIFEVMFST3Y"OESPJE͕ఏڙ͢ΔΫϥε
ΤϥʔϋϯυϦϯά͢Δ SFDJQF0CTFSWBCMFTVCTDSJCF OFX"DUJPO 3FDJQF \ !0WFSSJEF QVCMJDWPJEDBMM 3FDJQFSFDJQF \ TVDDFTT
TIPX3FDJQF SFDJQF ^ ^ OFX"DUJPO 5ISPXBCMF \ !0WFSSJEF QVCMJDWPJEDBMM 5ISPXBCMFUISPXBCMF \ FSSPS TIPX&SSPS UISPXBCMF ^ ^ OFX"DUJPO \ !0WFSSJEF QVCMJDWPJEDBMM \ DPNQMFUF IJEF1SPHSFTT ^ ^ ˞͜ΕΒ෦తʹ4VCTDSJCFSʹϥοϓ͞Ε͍ͯΔɻ4VCTDSJCFSΛ͍͍͕ͯ͠MBNCEBΛߟ͑Δͱݸผͷํ͕͍͍ͱࢥ͏
͞Β"TZOD5BTL http://qiita.com/KeithYokoma/items/1120ea1aacd6841d4e4d ༁ʳ"TZOD5BTLͱ"TZOD5BTL-PBEFSΛSY0CTFSWBCMFʹஔ͖͑Δ3Y+BWB"OESPJE1BUUFSOT 4VCTDSJQUJPOTVCTDSJQUJPO 4VCTDSJQUJPOTFNQUZ !0WFSSJEF QSPUFDUFEWPJEPO$SFBUF \ TVCTDSJQUJPO "OESPJE0CTFSWBCMF UIJT
SFDJQF JE TVCTDSJCF0O 4DIFEVMFSTJP NBQ TVCTDSJCF ^ !0WFSSJEF QSPUFDUFEWPJEPO%FTUSPZ \ TVQFSPO%FTUSPZ TVCTDSJQUJPOVOTVCTDSJCF ^
1SPNJTFԽͰ͞ΑͳΒ"TZOD5BTL w ͭͷΛ࣋ͭ0CTFSWBCMFΛ࡞Δ w 4DIFEVMFSͰ࣮ߦεϨουΛઃఆ͢Δ w ΤϥʔϋϯυϦϯάΛ͢Δ w "TZOD5BTLͱஔ͖͑Δ w
ςετ؆୯ʹॻ͚ΔΑ IUUQTZTZBHJIBUFOBCMPHDPNFOUSZ 5FTU4VCTDSJCFSΛͬͯ3Y+BWBͷTVCTDSJCFͷςετΛॻ͘
w ͯ͢0QFSBUPSͷ࿈݁Ͱ͋Δ -JGU
NBQ Recipe “Recipe” NBQ 3FDJQFΛ4USJOHʹม͢Δɻ ෦ͰԿ͕ى͖͍ͯΔʁ
QVCMJDpOBM 3 0CTFSWBCMF 3 NBQ 'VOD TVQFS5 FYUFOET3 GVOD \ SFUVSOMJGU OFX0QFSBUPS.BQ GVOD
^ NBQ
QVCMJDpOBM 3 0CTFSWBCMF 3 MJGU pOBM0QFSBUPS FYUFOET3 TVQFS5 MJGU \ SFUVSOOFX0CTFSWBCMF OFX0O4VCTDSJCF \ QVCMJDWPJEDBMM
4VCTDSJCFS TVQFS3 P \ USZ\ 4VCTDSJCFS TVQFS5 TU 4VCTDSJCFS 0CTFSWBCMFIPPLPO-JGU MJGU DBMM P USZ\ TUPO4UBSU 0CTFSWBCMFUIJTPO4VCTDSJCFDBMM TU ^ DBUDI 5ISPXBCMFF \ ུ TUPO&SSPS F ^ ^ DBUDI 5ISPXBCMFF \ ུ PPO&SSPS F ^ ^ ^ ^ MJGU ৽͍͠0CTFSWBCMFʻ3ʼΛ࡞ͬ ͯฦ͍ͯ͠Δɻ0CTFSWBCMF 5 ͷߪಡऀͱͯ͠ৼΔ͏
MJGU Recipe “Recipe” MJGU OFX0QFSBUPS.BQ GVOD 4VCTDSJCFS 3FDJQF ʹݟ͑Δ 0CTFSWBCMF 4USJOH ʹݟ͑Δ
QVCMJDpOBMDMBTT0QFSBUPS.BQ 5 3 JNQMFNFOUT0CTFSWBCMF0QFSBUPS 3 5 \ ུ QVCMJD4VCTDSJCFS TVQFS5 DBMM pOBM4VCTDSJCFS TVQFS3 P \ SFUVSOOFX4VCTDSJCFS
P \ QVCMJDWPJEPO$PNQMFUFE \ PPO$PNQMFUFE ^ QVCMJDWPJEPO&SSPS 5ISPXBCMFF \ PPO&SSPS F ^ QVCMJDWPJEPO/FYU 5U \ USZ\ PPO/FYU 0QFSBUPS.BQUIJTUSBOTGPSNFSDBMM U ^ DBUDI 5ISPXBCMFF \ &YDFQUJPOTUISPX*G'BUBM F PO&SSPS 0O&SSPS5ISPXBCMFBEE7BMVF"T-BTU$BVTF F U ^ ^ ^ ^ ^ 0QFSBUPS.BQ 'VOD 5 3 Λద༻ͯ͠ 4VCTDSJCFS 3 PO/FYU ʹ͠ ͍ͯΔɻ
TVCTDSJCF0O QVCMJDpOBM0CTFSWBCMF 5 TVCTDSJCF0O 4DIFEVMFSTDIFEVMFS \ JG UIJTJOTUBODFPG4DBMBS4ZODISPOPVT0CTFSWBCMF \ SFUVSO 4DBMBS4ZODISPOPVT0CTFSWBCMF 5 UIJT
TDBMBS4DIFEVMF0O TDIFEVMFS ^ SFUVSOOFTU MJGU OFX0QFSBUPS4VCTDSJCF0O 5 TDIFEVMFS ^ ͋ʂ
TVCTDSJCF0O OFTU Recipe MJGU OFX0QFSBUPS4VCTDSJCF0O TDIFEVMFS TDIFEVMFS͕ࢦఆͨ͠εϨου ͰTVCTDSJCF ͢Δ Recipe
$VTUPN0QFSBUPS QVCMJDJOUFSGBDF0QFSBUPS 3 5 FYUFOET'VOD 4VCTDSJCFS TVQFS3 4VCTDSJCFS TVQFS5 \ ^ ͨͩͷ'VOD
$VTUPN0QFSBUPS OFX0CTFSWBCMF0QFSBUPS 4USJOH *OUFHFS \ !0WFSSJEF QVCMJD4VCTDSJCFS TVQFS*OUFHFS DBMM 4VCTDSJCFS TVQFS4USJOH TVCTDSJCFS \
SFUVSOOFX4VCTDSJCFS *OUFHFS \ !0WFSSJEF QVCMJDWPJEPO$PNQMFUFE \ TVCTDSJCFSPO$PNQMFUFE ^ !0WFSSJEF QVCMJDWPJEPO&SSPS 5ISPXBCMFUISPXBCMF \ TVCTDSJCFSPO&SSPS UISPXBCMF ^ !0WFSSJEF QVCMJDWPJEPO/FYU *OUFHFSJOUFHFS \ TVCTDSJCFSPO/FYU JOUFHFSUP4USJOH ^ ^ ^ ^
4FSJBM0QFSBUPS QVCMJDDMBTT4FSJBM0QFSBUPS 3 5 JNQMFNFOUT0CTFSWBCMF0QFSBUPS 3 5 \ "DUJPO 4VCTDSJCFS TVQFS3 5 UIFO 5OFYU
4FSJBM0QFSBUPS "DUJPO 4VCTDSJCFS TVQFS3 5 UIFO \ UIJTUIFO UIFO ^ !0WFSSJEF QVCMJD4VCTDSJCFS TVQFS5 DBMM pOBM4VCTDSJCFS TVQFS3 TVCTDSJCFS \ SFUVSOOFX4VCTDSJCFS 5 \ !0WFSSJEF QVCMJDWPJEPO$PNQMFUFE \ UIFODBMM TVCTDSJCFS OFYU ^ !0WFSSJEF QVCMJDWPJEPO&SSPS 5ISPXBCMFUISPXBCMF \ TVCTDSJCFSPO&SSPS UISPXBCMF ^ !0WFSSJEF QVCMJDWPJEPO/FYU 5U \ OFYU U ^ ^ ^ ^
4FSJBM0QFSBUPS BQJVTFS 0CTFSWBCMF 6TFS MJGU OFX4FSJBM0QFSBUPS OFX"DUJPO 4VCTDSJCFS TVQFS-JTU 'FFE 6TFS \
!0WFSSJEF QVCMJDWPJEDBMM 4VCTDSJCFS TVQFS-JTU 'FFE TVCTDSJCFS 6TFSVTFS \ BQJVTFS'FFE VTFS TVCTDSJCF TVCTDSJCFS ^ ^ TVCTDSJCF OFX"DUJPO -JTU 'FFE \ !0WFSSJEF QVCMJDWPJEDBMM -JTU 'FFE GFFE-JTU \ EPTPNFUIJOH ^ ^ 0CTFSWBCMF 6TFS ͷऔಘΛͬ ͯɺVTFS'FFEΛऔΓʹߦ͖ɺ -JTU 'FFE Λऔಘ͢Δɻ
NFSHF QVCMJDTUBUJDpOBM 5 0CTFSWBCMF 5 NFSHF 0CTFSWBCMF FYUFOET0CTFSWBCMF FYUFOET5 TPVSDF \ SFUVSOTPVSDFMJGU OFX0QFSBUPS.FSHF
^
NFSHF ࣌ؒ࣠͝ͱϚʔδɻͭ·ΓύϥϨϧ
NFSHFΛͬͨฒྻϦΫΤετ -JTU 0CTFSWBCMF #PPMFBO PCTFSWBCMFT OFX"SSBZ-JTU PCTFSWBCMFTBEE SFDJQF 0CTFSWBCMF 3FDJQF EP0O/FYU OFX"DUJPO 3FDJQF \
!0WFSSJEF QVCMJDWPJEDBMM 3FDJQFSFDJQF \ TVDDFTT ^ ^ JT&NQUZ PCTFSWBCMFTBEE VTFS 0CTFSWBCMF 6TFS EP0O/FYU OFX"DUJPO 6TFS \ !0WFSSJEF QVCMJDWPJEDBMM 6TFSVTFS \ TVDDFTT ^ ^ JT&NQUZ 0CTFSWBCMF #PPMFBO QBSBMMFM 0CTFSWBCMFNFSHF PCTFSWBCMFT
NFSHFΛͬͨฒྻϦΫΤετ QBSBMMFMTVCTDSJCF OFX"DUJPO #PPMFBO \ !0WFSSJEF QVCMJDWPJEDBMM #PPMFBOB#PPMFBO \ શ෦ޭ
^ ^ OFX"DUJPO 5ISPXBCMF \ !0WFSSJEF QVCMJDWPJEDBMM 5ISPXBCMFUISPXBCMF \ ͍ͣΕ͔͕ࣦഊ ^ ^ ύϥϨϧʹ"1*ୟ͍ͯͪ߹Θͤͱ͔
w શ෦0QFSBUPSͷ࿈݁ͩɻڪΖ͘͠ෳࡶͳʜ w ιʔεΛಡΉΜͩɻ w ॊೈʹͳΜͰߏஙՄೳͳͷͰઃܭ͕͍͠ w ૬ஊ͍ͨ͠ શ෦0QFSBUPS
w 4VCKFDU0CTFSWFSͰ͋Γ0CTFSWBCMFͰ͋Δ 4VCKFDU
w όΠύεͷΠϝʔδ͔ͳʔʁ 4VCKFDU Recipe “Recipe” 4VCKFDU
w 3Y"OESPJE'SBNFXPSLͷ3Y"DUJWJUZ -JGFDZDMF0CTFSWBCMF w 4VCKFDUΛͬͨ-JTU7JFXͷՃಡΈࠐΈఆ w &WFOU#VT 4VCKFDU
Զͨͪͷઓ͍·ͩ࢝·͔ͬͨΓ
UPCFDPOUJOVFE
sys1yagi
missasan
alexzhukovich
sat
sayokomiura
acogoluegnes
oracle4engineer
yomaki
serinuntius
tacck
hichikawa1126
ryan403
zaki_lknr
lauravandoore
sferik
akmur
kastner
marcelosomers
bryan
jnunemaker
aarron
chrislema
productmarketing
jcasabona
cherdarchuk
