RxNight - Speaker Deck

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Reactive Practices at Kotlin 2015/11/05 RxNight @mattak

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RxJava+KotlinͰͷ tips঺հ͢ΔΑ

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1.notNull() -ɹnullͰͳ͍΋ͷΛ௨͢ -

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%FpOJUJPO GVO50CTFSWBCMF5 OPU/VMM 0CTFSWBCMF5\  SFUVSOUIJTpMUFS\JUOVMM^NBQ\JU^  ^ 6TBHF WBMPCTFSWBCMF0CTFSWBCMFKVTU OVMM OPU/VMM   PCTFSWBCMFTVCTDSJCF\  QSJOUMO JU   ^

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2.retry() -ɹࣦഊͯ͠΋·ͨsubscribe -

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CVUUPO$MJDL  qBU.BQ\OFUXPSL3FRVFTU ^ࣦഊ͢ΔͱAPO&SSPS A  SFUSZ PO&SSPS͕ݺ͹Εͯ΋SFUSZͰ࠶ͼTVCTDSJCF͞ΕΔ  TVCTDSJCF\  PO/FYU࣌ͷॲཧ  ^

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3.doOnNext() -ɹ෭࡞༻Λ༩͑Δ -

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0CTFSWBCMFKVTU   EP0O/FYU\-PHW %( PO/FYU JU ^  EP0O&SSPS\-PHW %( PO&SSPS JU ^  EP0O$PNQMFUFE\-PHW %( PO$PNQMFUFE ^  EP0O&BDI\-PHW %( PO&BDI JU ^  TVCTDSJCF\^ // σόοΫ͢Δͱ͖ʹศར

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4.CompositeSubscription -ɹsubscriptionΛ·ͱΊΔ -

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WBMTVCTDSJQUJPO0CTFSWBCMFKVTU TVCTDSJCF\^  WBMTVCTDSJQUJPO0CTFSWBCMFKVTU B C D TVCTDSJCF\^  WBMDPNQPTJUF4VCTDSJQUJPO$PNQPTJUF4VCTDSJQUJPO     DPNQPTJUF4VCTDSJQUJPOBEE TVCTDSJQUJPO   DPNQPTJUF4VCTDSJQUJPOBEE TVCTDSJQUJPO   DPNQPTJUF4VCTDSJQUJPOVOTVCTDSJCF // Ұؾʹunsubscribe͢Δͱ͖ʹศར

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5.onErrorResumeNext -ɹerrorΛແࢹ͍ͨ͠ -

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QVCMJDPCKFDU3FTPVSDFT&SSPS\  WBMFSSPS1VCMJTI4VCKFDU5ISPXBCMFCZMB[Z\1VCMJTI4VCKFDUDSFBUF5ISPXBCMF ^  ^    GVO50CTFSWBCMF5JOUFSDFQU/FUXPSL&SSPS 0CTFSWBCMF5\  SFUVSOUIJT  EP0O&SSPS\JG JUJT3FUSPpU&SSPS 3FTPVSDFT&SSPSFSSPSPO/FYU JU ^  PO&SSPS3FTVNF/FYU\JG JUJT3FUSPpU&SSPS 0CTFSWBCMFFNQUZ FMTFUISPXJU^  ^ // Network errorΛ interceptͯ͠௨஌

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6.combineAndDispose -ɹൃՐͤͭͭ͞ແࢹ͍ͨ͠ -

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GVO5 30CTFSWBCMF5DPNCJOF"OE%JTQPTF TJHOBM0CTFSWBCMF0CTFSWBCMF3 0CTFSWBCMF5\  SFUVSO0CTFSWBCMFDPNCJOF-BUFTU UIJT TJHOBM0CTFSWBCMF \EBUB TJHOBMEBUB^   ^ // Deﬁnition GVODIFDL&SSPS 0CTFSWBCMF*OU\  SFUVSO0CTFSWBCMF  FSSPS*OU *MMFHBM4UBUF&YDFQUJPO TUBUFJTXSPOH   ^    GVOFYFDVUF 0CTFSWBCMF*OU\  SFUVSO0CTFSWBCMF  KVTU   DPNCJOF"OE%JTQPTF DIFDL&SSPS   ^ // Usage: ΤϥʔνΣοΫ͚͍ͩͨ͠

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7.MergeReactiveProperty -ɹmergeͭͭ͠ɺ஋Λอ͍࣋ͨ͠ -

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// Deﬁnition DMBTT.FSHF3FBDUJWF1SPQFSUZ5"OZ QSJWBUFWBMDPODBU0CTFSWBCMF0CTFSWBCMF5 \  QSJWBUFMBUFJOJUWBSWBMVF5  QSJWBUFWBMDIBOOFM#FIBWJPS4VCKFDUDSFBUF5   QSJWBUFWBSEJSUZGBMTF    GVOHFU 5\SFUVSOWBMVF^  GVOTFU OFX7BMVF5 \  WBMVFOFX7BMVF  DIBOOFMPO/FYU OFX7BMVF   ^    WBMPCTFSWBCMF0CTFSWBCMF5  HFU 0CTFSWBCMF  NFSHF   DPODBU0CTFSWBCMFEP0O/FYU\EJSUZUSVF^   DIBOOFM    EP0O/FYU\JG EJSUZ WBMVFJUEJSUZGBMTF^  ^