{"id":1820,"date":"2014-12-16T17:45:38","date_gmt":"2014-12-16T17:45:38","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=1820"},"modified":"2014-12-16T17:45:38","modified_gmt":"2014-12-16T17:45:38","slug":"using-map-and-reduce-view-ranking","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/ko\/using-map-and-reduce-view-ranking\/","title":{"rendered":"\uc21c\uc704\ub97c \uc704\ud55c \uc9c0\ub3c4 \ubc0f \ucd95\uc18c \ubcf4\uae30 \uc0ac\uc6a9"},"content":{"rendered":"

\ubc84\uc804 2.0\ubd80\ud130 Couchbase \uc11c\ubc84\ub294 \ubdf0\ub77c\ub294 \uac1c\ub150\uc744 \ud1b5\ud574 JSON \ubb38\uc11c\uc5d0 \ub300\ud55c \uc778\ub371\uc2a4\ub97c \uc0dd\uc131\ud558\ub294 \uac15\ub825\ud55c \ubc29\ubc95\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/span><\/b><\/p>\n

<\/p>\n

\ubcf4\uae30\ub97c \uc0ac\uc6a9\ud558\uc5ec \uae30\ubcf8 \uc778\ub371\uc2a4, \ubcf5\ud569 \uc778\ub371\uc2a4 \ubc0f \uc9d1\uacc4\ub97c \uc815\uc758\ud558\uc5ec \ub2e4\uc74c\uacfc \uac19\uc740 \uc791\uc5c5\uc744 \uc218\ud589\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/span><\/b><\/p>\n

\ub2e4\uc591\ud55c JSON \uc18d\uc131\uc5d0 \ub300\ud55c \ubb38\uc11c \ucffc\ub9ac<\/span><\/b><\/p>\n

\ud1b5\uacc4 \ubc0f \uc9d1\uacc4 \ub9cc\ub4e4\uae30<\/span><\/b><\/p>\n

<\/p>\n

\ubdf0\ub294 \uad6c\uccb4\ud654\ub41c \uc778\ub371\uc2a4\ub97c \uc0dd\uc131\ud558\ubbc0\ub85c \ubbf8\ub9ac \uc815\uc758\ub41c \ucffc\ub9ac\ub97c \uc2e4\ud589\ud558\ub294 \ube60\ub974\uace0 \ud6a8\uc728\uc801\uc778 \ubc29\ubc95\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/span><\/b><\/p>\n

<\/p>\n

\uc774 \ube14\ub85c\uadf8\uc5d0\uc11c\ub294 \ub9f5 \ubc0f \ucd95\uc18c\ub97c \uc0ac\uc6a9\ud558\uc5ec JSON \ubb38\uc11c \uc18d\uc131\uc744 \uc0c9\uc778\ud558\uace0 \ud574\ub2f9 \uc18d\uc131\uc744 \uae30\ubc18\uc73c\ub85c \ubb38\uc11c \uc21c\uc704\ub97c \uacb0\uc815\ud558\ub294 \ubcf4\uae30\ub97c \ub9cc\ub4dc\ub294 \uac04\ub2e8\ud55c \uc608\uc81c\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/span><\/b><\/p>\n

\uc9c0\ub3c4\uc640 \ucd95\uc18c\ub97c \uc0ac\uc6a9\ud558\uba74 \uc21c\uc704\ub97c \uacb0\uc815\ud558\ub294 \ub9e4\uc6b0 \ube60\ub974\uace0 \ud6a8\uc728\uc801\uc778 \ubc29\ubc95\uc774\uba70 \uc218\ubc31\ub9cc \uba85\uc758 \uc0ac\uc6a9\uc790\uc5d0 \uac78\uccd0 \ud655\uc7a5\ud560 \uc218 \uc788\uace0 \ub9e4\uc6b0 \ube60\ub978 \uc21c\uc704 \uc870\ud68c\ub97c \uc81c\uacf5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uace0\ub9c8\uc6cc\uc694 <\/span>Aaron<\/span><\/a> \uac00\ub974\uccd0 \uc8fc\uc154\uc11c \uac10\uc0ac\ud569\ub2c8\ub2e4!<\/span><\/b><\/p>\n

<\/p>\n

\uc608\ub97c \ub4e4\uc5b4 \uc810\uc218\ub098 \uacbd\ud5d8\uc5d0 \ub530\ub77c \uc0ac\uc6a9\uc790 \uc21c\uc704\ub97c \ub9e4\uae30\ub294 \ub370 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/b><\/p>\n

<\/p>\n

\uc774 \ube14\ub85c\uadf8\uc5d0\uc11c\ub294 \uc774\ub984\uacfc \uacbd\ud5d8\uc774\ub77c\ub294 \ub450 \uac00\uc9c0 \uc18d\uc131\uc744 \uac00\uc9c4 \uc0ac\uc6a9\uc790 \ubb38\uc11c\uc5d0 \ub300\ud55c \uac1c\ub150\uc744 \uc124\uba85\ud558\uba70, \uacbd\ud5d8\uc744 \uae30\ubc18\uc73c\ub85c \uc774 \ubb38\uc11c\ub97c \uc0c9\uc778\ud558\uace0 \uacbd\ud5d8 \uc18d\uc131\uc5d0 \ub530\ub77c \uc21c\uc704\ub97c \uacb0\uc815\ud560 \uc218 \uc788\ub3c4\ub85d \ud569\ub2c8\ub2e4.<\/span><\/b><\/p>\n


\uba3c\uc800 Couchbase \uc11c\ubc84\uc5d0 \uc5f0\uacb0\ud558\uace0 \uc0ac\uc6a9\uc790 \ubb38\uc11c\ub97c \ub9cc\ub4e4 \uc218 \uc788\ub294 \uba87 \uac00\uc9c0 Java \ucf54\ub4dc\ub97c \uc791\uc131\ud558\uaca0\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c Java \ucf54\ub4dc\ub294 \ub3c5\ub9bd\uc801\uc778 \ucf54\ub4dc\uc774\uba70 \uc0ac\uc6a9\uc790\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/span><\/b><\/p>\n

JSON \uac1d\uccb4\ub97c \uc0dd\uc131\ud558\uae30 \uc704\ud574 Gson Google \ucf54\ub4dc \ub77c\uc774\ube0c\ub7ec\ub9ac\ub97c \ud65c\uc6a9\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/b><\/p>\n

\u00a0<\/p>\n

\ud328\ud0a4\uc9c0 \ube14\ub85c\uadf8;<\/span><\/b><\/code><\/p>\n

<\/p>\n

com.couchbase.client.CouchbaseClient\ub97c \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/code><\/p>\n

com.couchbase.client.CouchbaseConnectionFactoryBuilder\ub97c \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/code><\/p>\n

com.google.gson.Gson\uc744 \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/code><\/p>\n

java.io.IOException\uc744 \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/code><\/p>\n

java.io.UnsupportedEncodingException\uc744 \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/code><\/p>\n

java.net.URI\ub97c \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/code><\/p>\n

java.util.ArrayList\ub97c \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/code><\/p>\n

<\/p>\n

UserDoc \ud074\ub798\uc2a4 {<\/span><\/b><\/code><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\ubb38\uc790\uc5f4 \uc774\ub984\uc785\ub2c8\ub2e4;<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\uc624\ub79c \uacbd\ud5d8;<\/span><\/b><\/code><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0UserDoc(\ubb38\uc790\uc5f4 \uc774\ub984, \uae34 \uacbd\ud5d8) {<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this.name = \uc774\ub984;<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this.experience = \uacbd\ud5d8;<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0}<\/span><\/b><\/code><\/p>\n

}<\/span><\/b><\/code><\/p>\n

\/**<\/span><\/b><\/code><\/p>\n

*<\/span><\/b><\/code><\/p>\n

* \uc800\uc790 \uc54c\ub809\uc2dc\uc2a4<\/span><\/b><\/code><\/p>\n

*\/<\/span><\/b><\/code><\/p>\n

\uacf5\uc6a9 \ud074\ub798\uc2a4 RankView {<\/span><\/b><\/code><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\ube44\uacf5\uac1c \uc815\uc801 \uce74\uc6b0\uce58\ubca0\uc774\uc2a4\ud074\ub77c\uc774\uc5b8\ud2b8 \ud074\ub77c\uc774\uc5b8\ud2b8;<\/span><\/b><\/code><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0public static void main(String[] args) throws UnsupportedEncodingException, IOException {<\/span><\/b><\/code><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ArrayList \ub178\ub4dc = \uc0c8 \ubc30\uc5f4 \ubaa9\ub85d<>();<\/span><\/b><\/code><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \ud074\ub7ec\uc2a4\ud130\uc758 \ub178\ub4dc\ub97c \ud558\ub098 \uc774\uc0c1 \ucd94\uac00\ud569\ub2c8\ub2e4(\uc0ac\uc6a9\uc790 \ub178\ub4dc\uc640 IP \uad50\ud658).<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0nodes.add(URI.create(\"https:\/\/127.0.0.1:8091\/pools\"));<\/span><\/b><\/code><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \ud074\ub77c\uc774\uc5b8\ud2b8\uc5d0 \uc5f0\uacb0\uc744 \uc2dc\ub3c4\ud569\ub2c8\ub2e4.<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0CouchbaseConnectionFactoryBuilder cfb = \uc0c8\ub85c\uc6b4 CouchbaseConnectionFactoryBuilder();<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0cfb.setOpTimeout(10000);<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0cfb.setReadBufferSize(1024);<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0cfb.setShouldOptimize(true);<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0cfb.setTimeoutExceptionThreshold(100);<\/span><\/b><\/code><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\uc2dc\ub3c4 {<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0client = new CouchbaseClient(cfb.buildCouchbaseConnection(nodes, \"default\", \"\"));<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0} catch (Exception e) {<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.err.println(\"\uce74\uc6b0\uce58\ubca0\uc774\uc2a4\uc5d0 \uc5f0\uacb0\ud558\ub294 \ub3d9\uc548 \uc624\ub958\uac00 \ubc1c\uc0dd\ud588\uc2b5\ub2c8\ub2e4: \" + e.getMessage());<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.exit(1);<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/span><\/b><\/code><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0UserDoc \uc0ac\uc6a9\uc790 = null;<\/span><\/b><\/code><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \uc0ac\uc6a9\uc790 \uc0dd\uc131<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0for (int i = 0; i < 10; i++) {<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0user = new UserDoc(\"User\" + i, Math.round(Math.random()*1000));<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Gson json = \uc0c8 Gson();<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\ubb38\uc790\uc5f4 jsonString = json.toJson(user);<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0client.set(user.name, 0, jsonString);<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/span><\/b><\/code><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0client.shutdown();<\/span><\/b><\/code><\/p>\n

\u00a0\u00a0\u00a0}<\/span><\/b><\/code><\/p>\n

}<\/span><\/b><\/code><\/p>\n

<\/p>\n

\uc774 \ud504\ub85c\uadf8\ub7a8\uc744 \uc2e4\ud589\ud55c \ud6c4(URL \ub610\ub294 \ubc84\ud0b7 \uc774\ub984\uc744 \uc801\uc808\ud788 \ubcc0\uacbd\ud558\uc138\uc694) \uc774\uc81c \ubc84\ud0b7\uc5d0 10\uba85\uc758 \uc0ac\uc6a9\uc790\uac00 \uc788\uc5b4\uc57c \ud569\ub2c8\ub2e4.<\/b><\/p>\n

\u00a0<\/p>\n

<\/p>\n

<\/b><\/p>\n

<\/p>\n

\ub2e4\uc74c \ub2e8\uacc4\ub294 \uc21c\uc704 \ubcf4\uae30\uac00 \uc788\ub294 \uc0ac\uc6a9\uc790 \ub514\uc790\uc778 \ubb38\uc11c\uc785\ub2c8\ub2e4.<\/span><\/b><\/p>\n

\uccab \ubc88\uc9f8 \ub2e8\uacc4\ub294 \uacbd\ud5d8 \uc18d\uc131\uc744 \ubc29\ucd9c\ud560 \uc21c\uc704 \ubcf4\uae30\uc6a9 \uac04\ub2e8\ud55c \ub9f5\uc744 \ub9cc\ub4dc\ub294 \uac83\uc785\ub2c8\ub2e4:<\/span><\/b><\/p>\n

\ud568\uc218 (\ubb38\uc11c, \uba54\ud0c0) {<\/span><\/b><\/p>\n

\u00a0if (doc.experience)<\/span><\/b><\/p>\n

\u00a0 <\/span>emit(doc.experience, null);<\/span><\/b><\/p>\n

}<\/span><\/b><\/p>\n

<\/p>\n

\uc774\ub807\uac8c \ud558\uba74 \uacbd\ud5d8 \uc18d\uc131\uc744 \uae30\ubc18\uc73c\ub85c \uc778\ub371\uc2a4\uac00 \uc0dd\uc131\ub418\uc9c0\ub9cc \uc21c\uc704\ub97c \uacb0\uc815\ud560 \uc218\ub294 \uc5c6\uc2b5\ub2c8\ub2e4.<\/span><\/b><\/p>\n

<\/p>\n

\uc5ec\uae30\uc5d0 Reduce\ub97c \ucd94\uac00\ud558\ub294 \uac83\uc774 \uc801\ud569\ud569\ub2c8\ub2e4. \uac04\ub2e8\ud55c \ub0b4\uc7a5 _count reduce\ub97c \ucd94\uac00\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/span><\/b><\/p>\n

\uc804\uccb4 \ubcf4\uae30\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \ud45c\uc2dc\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4:<\/span><\/b><\/p>\n

<\/b><\/p>\n

\uac10\uc18c \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uba74 \uc54c\ub824\uc9c4 \uacbd\ud5d8 \uac12(doc.experience\uc778 \uacbd\uc6b0)\uc744 \uac00\uc9c4 \uc0ac\uc6a9\uc790 \ubb38\uc11c\uc758 \uc218\ub97c \uc9d1\uacc4\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/b><\/p>\n

\ucffc\ub9ac \ub9e4\uac1c\ubcc0\uc218\ub97c \uc9c0\uc815\ud558\uc9c0 \uc54a\uc73c\uba74 \uc0dd\uc131\ud55c \ubb38\uc11c \uc218\uc778 10\uc744 \ucd9c\ub825\ud569\ub2c8\ub2e4.<\/span><\/b><\/p>\n

<\/p>\n

\ud2b9\uc815 \uc0ac\uc6a9\uc790\uc758 \uc21c\uc704\ub97c \uc870\ud68c\ud558\ub824\uba74 \uba3c\uc800 \ud2b9\uc815 \uc0ac\uc6a9\uc790(\uc774 \uc608\uc5d0\uc11c\ub294 User5)\uc758 \uc21c\uc704\ub97c \uc870\ud68c\ud574\uc57c \ud569\ub2c8\ub2e4:<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \ud2b9\uc815 \uc0ac\uc6a9\uc790 \uc870\ud68c<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\ubb38\uc790\uc5f4 jsonString = (\ubb38\uc790\uc5f4) client.get(\"User5\");<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0user = json.fromJson(jsonString, UserDoc.class);<\/span><\/b><\/p>\n

<\/p>\n

\uac70\uae30\uc5d0\uc11c \ucd5c\ub300 \uac12\uc73c\ub85c \uc2dc\uc791\ud558\uc5ec \ub354 \ud070 \uacbd\ud5d8\uc744 \uac00\uc9c4 \ubaa8\ub4e0 \uc0ac\uc6a9\uc790\ub97c \ucea1\ucc98\ud558\uace0 \uc0ac\uc6a9\uc790\uc5d0 \ub300\ud55c \uac00\uce58\ub85c \ub05d\ub098\ub294 \ub0b4\ub9bc\ucc28\uc21c\uc758 \ubc94\uc704 \ucffc\ub9ac\ub85c \uc774 \uc218\ub97c \ud544\ud130\ub9c1\ud558\ub294 \ucffc\ub9ac\ub97c \ub9cc\ub4e4 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\ubcf4\uae30 \ubcf4\uae30 = client.getView(\"User\", \"Rank\");<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\ucffc\ub9ac \ucffc\ub9ac = \uc0c8 \ucffc\ub9ac();<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0query.setIncludeDocs(true).setLimit(10000);<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0query.setRangeStart(Long.toString(Long.MAX_VALUE));<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0query.setRangeEnd(Long.toString(user.experience));<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0query.setDescending(true);<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0query.setReduce(true);<\/span><\/b><\/p>\n

\ub530\ub77c\uc11c \uac10\uc18c\ub294 \ud574\ub2f9 \uc0ac\uc6a9\uc790\uc758 \uacbd\ud5d8\ubcf4\ub2e4 \ub354 \ud070 \uacbd\ud5d8\uc744 \uac00\uc9c4 \uc0ac\uc6a9\uc790 \uc218\ub97c \ucd9c\ub825\ud569\ub2c8\ub2e4. \uc21c\uc704\ub294 \ub2e8\uc21c\ud788 \ud574\ub2f9 \uc22b\uc790 + 1\uc785\ub2c8\ub2e4.<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\ubdf0 \uc751\ub2f5 \uc751\ub2f5 = client.query(view, query);<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\uc774\ud130\ub808\uc774\ud130 itr = response.iterator();<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0while (itr.hasNext()) {<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ViewRow \ud589 = itr.next();<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"Rank: \" + Long.parseLong(row.getValue() + 1 );<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/span><\/b><\/p>\n

\uc774\ub807\uac8c \ud558\uba74 \ud574\ub2f9 \uc0ac\uc6a9\uc790\uc758 \uacbd\ud5d8\uc5d0 \ub530\ub77c \uc21c\uc704\uac00 \ucd9c\ub825\ub429\ub2c8\ub2e4:<\/span><\/b><\/p>\n

\uc21c\uc704: 7<\/span><\/b><\/p>\n

\uc804\uccb4 Java \ucf54\ub4dc(\ub2e4\uc2dc \uc790\uccb4 \ud3ec\ud568)\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/span><\/b><\/p>\n

<\/p>\n

\ud328\ud0a4\uc9c0 \ube14\ub85c\uadf8;<\/span><\/b><\/p>\n

<\/p>\n

com.couchbase.client.CouchbaseClient\ub97c \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/p>\n

com.couchbase.client.CouchbaseConnectionFactoryBuilder\ub97c \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/p>\n

com.couchbase.client.protocol.views.Query\ub97c \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/p>\n

com.couchbase.client.protocol.views.View\ub97c \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/p>\n

com.couchbase.client.protocol.views.ViewResponse\ub97c \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/p>\n

com.couchbase.client.protocol.views.ViewRow\ub97c \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/p>\n

com.google.gson.Gson\uc744 \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/p>\n

java.io.IOException\uc744 \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/p>\n

java.io.UnsupportedEncodingException\uc744 \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/p>\n

java.net.URI\ub97c \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/p>\n

java.util.ArrayList\ub97c \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/p>\n

java.util.Iterator\ub97c \uac00\uc838\uc635\ub2c8\ub2e4;<\/span><\/b><\/p>\n

<\/p>\n

UserDoc \ud074\ub798\uc2a4 {<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\ubb38\uc790\uc5f4 \uc774\ub984\uc785\ub2c8\ub2e4;<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\uc624\ub79c \uacbd\ud5d8;<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0UserDoc(\ubb38\uc790\uc5f4 \uc774\ub984, \uae34 \uacbd\ud5d8) {<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this.name = \uc774\ub984;<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this.experience = \uacbd\ud5d8;<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0}<\/span><\/b><\/p>\n

}<\/span><\/b><\/p>\n

<\/p>\n

\/**<\/span><\/b><\/p>\n

*<\/span><\/b><\/p>\n

* \uc800\uc790 \uc54c\ub809\uc2dc\uc2a4<\/span><\/b><\/p>\n

*\/<\/span><\/b><\/p>\n

\uacf5\uc6a9 \ud074\ub798\uc2a4 RankView {<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\ube44\uacf5\uac1c \uc815\uc801 \uce74\uc6b0\uce58\ubca0\uc774\uc2a4\ud074\ub77c\uc774\uc5b8\ud2b8 \ud074\ub77c\uc774\uc5b8\ud2b8;<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0public static void main(String[] args) throws UnsupportedEncodingException, IOException {<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ArrayList \ub178\ub4dc = \uc0c8 \ubc30\uc5f4 \ubaa9\ub85d<>();<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \ud074\ub7ec\uc2a4\ud130\uc758 \ub178\ub4dc\ub97c \ud558\ub098 \uc774\uc0c1 \ucd94\uac00\ud569\ub2c8\ub2e4(\uc0ac\uc6a9\uc790 \ub178\ub4dc\uc640 IP \uad50\ud658).<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0nodes.add(URI.create(\"https:\/\/127.0.0.1:8091\/pools\"));<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \ud074\ub77c\uc774\uc5b8\ud2b8\uc5d0 \uc5f0\uacb0\uc744 \uc2dc\ub3c4\ud569\ub2c8\ub2e4.<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0CouchbaseConnectionFactoryBuilder cfb = \uc0c8\ub85c\uc6b4 CouchbaseConnectionFactoryBuilder();<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0cfb.setOpTimeout(10000);<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0cfb.setReadBufferSize(1024);<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0cfb.setShouldOptimize(true);<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0cfb.setTimeoutExceptionThreshold(100);<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\uc2dc\ub3c4 {<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0client = new CouchbaseClient(cfb.buildCouchbaseConnection(nodes, \"default\", \"\"));<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0} catch (Exception e) {<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.err.println(\"\uce74\uc6b0\uce58\ubca0\uc774\uc2a4\uc5d0 \uc5f0\uacb0\ud558\ub294 \ub3d9\uc548 \uc624\ub958\uac00 \ubc1c\uc0dd\ud588\uc2b5\ub2c8\ub2e4: \" + e.getMessage());<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.exit(1);<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0UserDoc \uc0ac\uc6a9\uc790 = null;<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Gson json = null;<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \uc0ac\uc6a9\uc790 \uc0dd\uc131<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0for (int i = 0; i < 10; i++) {<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0user = new UserDoc(\"User\" + i, Math.round(Math.random() * 1000));<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0json = \uc0c8 Gson();<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\ubb38\uc790\uc5f4 jsonString = json.toJson(user);<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0client.set(user.name, 0, jsonString);<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \ud2b9\uc815 \uc0ac\uc6a9\uc790 \uc870\ud68c<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\ubb38\uc790\uc5f4 jsonString = (\ubb38\uc790\uc5f4) client.get(\"User5\");<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0user = json.fromJson(jsonString, UserDoc.class);<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\ubcf4\uae30 \ubcf4\uae30 = client.getView(\"User\", \"Rank\");<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\ucffc\ub9ac \ucffc\ub9ac = \uc0c8 \ucffc\ub9ac();<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0query.setIncludeDocs(true).setLimit(10000);<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0query.setRangeStart(Long.toString(Long.MAX_VALUE));<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0query.setRangeEnd(Long.toString(user.experience));<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0query.setDescending(true);<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0query.setReduce(true);<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\ubdf0 \uc751\ub2f5 \uc751\ub2f5 = client.query(view, query);<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\uc774\ud130\ub808\uc774\ud130 itr = response.iterator();<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0while (itr.hasNext()) {<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ViewRow \ud589 = itr.next();<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"Rank: \" + Long.parseLong(row.getValue() + 1 );<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/span><\/b><\/p>\n

<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0client.shutdown();<\/span><\/b><\/p>\n

\u00a0\u00a0\u00a0}<\/span><\/b><\/p>\n

}<\/span><\/b><\/p>\n

<\/p>\n

\ub9f5\uacfc \ucd95\uc18c \ubcf4\uae30\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc21c\uc704\ub97c \uc870\ud68c\ud558\uba74 \ud074\ub77c\uc774\uc5b8\ud2b8 \uce21\uc5d0\uc11c \ucd94\uac00 \ucc98\ub9ac\ub97c \ud558\uc9c0 \uc54a\uace0\ub3c4 \ube60\ub974\uace0 \ud6a8\uc728\uc801\uc73c\ub85c \uc21c\uc704\ub97c \uc870\ud68c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/b><\/p>\n

<\/p>\n

Couchbase\uc758 \ubcf4\uae30 \ubc0f \ucffc\ub9ac\uc5d0 \ub300\ud574 \uc790\uc138\ud788 \uc54c\uc544\ubcf4\ub824\uba74 \ub2e4\uc74c\uc744 \ucc38\uc870\ud558\uc138\uc694: <\/span>https:\/\/www.couchbase.com\/docs\/couchbase-devguide-2.1.0\/indexing-querying-data.html<\/span><\/a><\/b><\/p>\n

\uc9c8\ubb38 \ubc0f \uc758\uacac <\/span>alexis@couchbase.com<\/span><\/a> \ub610\ub294 \ud2b8\uc704\ud130\uc5d0\uc11c @alexisroos\ub97c \ud314\ub85c\uc6b0\ud558\uc138\uc694.<\/span><\/b><\/p>","protected":false},"excerpt":{"rendered":"

Starting from version 2.0, Couchbase server offers a powerful way of creating indexes for JSON documents through the concept of views. Using views, it is possible to define primary indexes, composite indexes and aggregations allowing to: . query documents on […]<\/p>","protected":false},"author":15,"featured_media":13873,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1],"tags":[1248,1241],"ppma_author":[8994],"class_list":["post-1820","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-mapreduce","tag-views"],"acf":[],"yoast_head":"\nUsing Map and Reduce View for Ranking - The Couchbase Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.couchbase.com\/blog\/ko\/using-map-and-reduce-view-ranking\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Using Map and Reduce View for Ranking\" \/>\n<meta property=\"og:description\" content=\"Starting from version 2.0, Couchbase server offers a powerful way of creating indexes for JSON documents through the concept of views. 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