babel-node -e \"require('.\/sync.js').syncRequest('London')\"<\/code><\/pre>\nAbra o Admin Dashboard para monitorar os documentos que foram salvos no Sync Gateway.<\/p>\n
https:\/\/localhost:4985\/_admin\/<\/p>\n
Agora voc\u00ea deve ver 20 documentos, sendo que cada um deles \u00e9 um local em Londres:<\/p>\n
Cria\u00e7\u00e3o do aplicativo Android<\/h2>\n Nesta se\u00e7\u00e3o, voc\u00ea aprender\u00e1 a usar o SDK do Google Maps no Android para obter a cidade em que o usu\u00e1rio est\u00e1 localizado no momento. Com essas informa\u00e7\u00f5es, voc\u00ea criar\u00e1 um documento do tipo perfil<\/strong> para armazenar a cidade atual.<\/p>\nAbra o Android Studio e selecione Iniciar um novo projeto do Android Studio<\/strong> do In\u00edcio r\u00e1pido<\/strong> menu.<\/p>\nNomear o aplicativo CityExplorer<\/strong>defina um dom\u00ednio da empresa e um local do projeto adequados e clique em Pr\u00f3ximo<\/strong>:<\/p>\n
Na caixa de di\u00e1logo Target Android Devices (Dispositivos Android de destino), certifique-se de marcar Telefone e tablet<\/strong>defina o SDK m\u00ednimo como API 22: Android 5.1 (Lollipop)<\/strong> para ambos, e clique em Pr\u00f3ximo<\/strong>:<\/p>\n
No dia seguinte Adicionar uma atividade ao Mobile<\/strong> selecione Add Atividade em branco<\/strong> e nomeie a atividade Atividade principal<\/strong>:<\/p>\n
Voc\u00ea usar\u00e1 o provedor de localiza\u00e7\u00e3o fundido<\/strong> para recuperar a \u00faltima localiza\u00e7\u00e3o conhecida do dispositivo. Em build.gradle<\/strong>adicione a seguinte depend\u00eancia:<\/p>\ncompile 'com.google.android.gms:play-services:7.5.0'<\/code><\/pre>\nAdicionar uma permiss\u00e3o de solicita\u00e7\u00e3o de localiza\u00e7\u00e3o em AndroidManifest.xml<\/strong> no manifesto<\/strong> Etiqueta XML:<\/p>\n<\/code><\/pre>\nEm MainActivity.java<\/strong>adicione um novo m\u00e9todo chamado criar cliente GoogleApi<\/strong> para inicializar o SDK da API do Google e chamar o m\u00e9todo em onCreate<\/strong>:<\/p>\nprotected synchronized void buildGoogleApiClient() {\r\n mGoogleApiClient = new GoogleApiClient.Builder(this)\r\n .addConnectionCallbacks(this)\r\n .addOnConnectionFailedListener(this)\r\n .addApi(LocationServices.API)\r\n .build();\r\n mGoogleApiClient.connect();\r\n}<\/code><\/pre>\nEm seguida, voc\u00ea far\u00e1 Atividade principal<\/strong> implementar o GoogleApiClient.ConnectionCallbacks<\/strong> e GoogleApiClient.OnConnectionFailedListener<\/strong> e recuperar o local em onConnected<\/strong>:<\/p>\n@Override\r\npublic void onConnected(Bundle bundle) {\r\n Location mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);\r\n Geocoder geocoder = new Geocoder(this, Locale.getDefault());\r\n List<\/code><\/pre>\naddresses = null; try { addresses = geocoder.getFromLocation(mLastLocation.getLatitude(), mLastLocation.getLongitude(), 1); } catch (IOException e) { e.printStackTrace(); } if (addresses.size() > 0) { String city = addresses.get(0).getLocality(); cityLabel.setText(city); } } @Override public void onConnectionSuspended(int i) { } @Override public void onConnectionFailed(ConnectionResult connectionResult) { }<\/address>\n<\/code><\/pre>\nExecute o aplicativo e voc\u00ea ver\u00e1 a cidade atual exibida no meio da tela:<\/p>\n
Em seguida, voc\u00ea adicionar\u00e1 o Couchbase Lite ao seu projeto. Em build.gradle<\/strong> adicione o seguinte:<\/p>\n\/\/ workaround for \"duplicate files during packaging of APK\" issue\r\n\/\/ see https:\/\/groups.google.com\/d\/msg\/adt-dev\/bl5Rc4Szpzg\/wC8cylTWuIEJ\r\npackagingOptions {\r\n exclude 'META-INF\/ASL2.0'\r\n exclude 'META-INF\/LICENSE'\r\n exclude 'META-INF\/NOTICE'\r\n}<\/code><\/pre>\nAdicione o pacote do Couchbase Lite para Android em build.gradle<\/strong>:<\/p>\ncompile 'com.couchbase.lite:couchbase-lite-android:1.1.0'<\/code><\/pre>\nCriar um SyncManager.java<\/strong> e adicione o c\u00f3digo para iniciar uma replica\u00e7\u00e3o pull e push no modo cont\u00ednuo:<\/p>\npublic class SyncManager {\r\n private static final String DATABASE_NAME = \"cityexplorer\";\r\n private static final String SYNC_URL = \"https:\/\/localhost:4984\/db\/\";\r\n private static final String CITIES_VIEW = \"getCities\";\r\n\r\n private Context context;\r\n private Manager manager;\r\n private Database database;\r\n\r\n public SyncManager(Context context) {\r\n this.context = context;\r\n\r\n openDatabase();\r\n }\r\n\r\n private void openDatabase() {\r\n try {\r\n manager = new Manager(new AndroidContext(context), Manager.DEFAULT_OPTIONS);\r\n } catch (IOException e) {\r\n e.printStackTrace();\r\n }\r\n\r\n try {\r\n database = manager.getDatabase(DATABASE_NAME);\r\n } catch (CouchbaseLiteException e) {\r\n e.printStackTrace();\r\n }\r\n\r\n startSync();\r\n }\r\n\r\n private void startSync() {\r\n URL url = null;\r\n try {\r\n url = new URL(SYNC_URL);\r\n } catch (MalformedURLException e) {\r\n e.printStackTrace();\r\n }\r\n\r\n Replication push = database.createPushReplication(url);\r\n push.setContinuous(true);\r\n push.start();\r\n\r\n Replication pull = database.createPullReplication(url);\r\n pull.setContinuous(true);\r\n pull.start();\r\n }\r\n\r\n public Database getDatabase() {\r\n return database;\r\n }\r\n\r\n public void setDatabase(Database database) {\r\n this.database = database;\r\n }\r\n}<\/code><\/pre>\nExecute o aplicativo e d\u00ea uma olhada no LogCat, e voc\u00ea ver\u00e1 que a replica\u00e7\u00e3o foi bem-sucedida. Mas n\u00e3o h\u00e1 como consultar os documentos que foram sincronizados at\u00e9 o momento. Para fazer isso, voc\u00ea usar\u00e1 um Couchbase View que indexar\u00e1 os documentos por seus cidade<\/strong> propriedade.<\/p>\nEm SyncManager.java<\/strong>adicione o seguinte m\u00e9todo:<\/p>\nprivate void registerViews() {\r\n View citiesView = database.getView(CITIES_VIEW);\r\n citiesView.setMapReduce(new Mapper() {\r\n @Override\r\n public void map(Map<String, Object> document, Emitter emitter) {\r\n if (document.get(\"name\") != null) {\r\n List key = new ArrayList();\r\n key.add(document.get(\"city\"));\r\n emitter.emit(key, null);\r\n }\r\n }\r\n }, new Reducer() {\r\n @Override\r\n public Object reduce(List keys, List values, boolean rereduce) {\r\n return new Integer(values.size());\r\n }\r\n }, \"7\");\r\n}\r\n\r\nTo query that view, add another method called consultarCidades<\/strong> assim:\r\n\r\nprivate void queryCities() {\r\n Query query = database.getView(CITIES_VIEW).createQuery();\r\n query.setGroupLevel(1);\r\n try {\r\n QueryEnumerator enumeration = query.run();\r\n for (QueryRow row : enumeration) {\r\n System.out.println(\"Row is \" + row.getValue() + \" and key \" + row.getKey());\r\n }\r\n } catch (CouchbaseLiteException e) {\r\n e.printStackTrace();\r\n }\r\n}<\/code><\/pre>\nE o chamem depois registrar visualiza\u00e7\u00f5es<\/code> no openDatabase<\/code> Execute o aplicativo e voc\u00ea ver\u00e1 o n\u00famero de locais em cada cidade no LogCat:onConnected<\/code> m\u00e9todo de MainActivity.java<\/strong> voc\u00ea adicionar\u00e1 c\u00f3digo para manter um novo documento localmente com um tipo<\/strong> propriedade igual a perfil<\/strong> e cidade<\/strong> Antes de executar o aplicativo, vamos recapitular os diferentes componentes dessa arquitetura:\nLaranja<\/strong>: Quando um usu\u00e1rio abre o aplicativo, o documento de perfil \u00e9 mantido localmente e enviado ao Sync Gateway por meio da replica\u00e7\u00e3o cont\u00ednua por push e aciona um webhook.<\/li>\nAzul<\/strong>: O App Server lida com os webhooks e importa os locais de uma determinada cidade para o Sync Gateway.<\/li>\nVerde<\/strong>: O usu\u00e1rio apropriado recebe os documentos de acordo com as regras de acesso definidas na Fun\u00e7\u00e3o de sincroniza\u00e7\u00e3o.<\/li>\n<\/ul>\nO Verde<\/strong> sempre ocorrer\u00e1 algum tempo depois que o aplicativo for aberto. Seria bom monitorar a consulta de cidades no aplicativo Android para monitorar os dados \u00e0 medida que eles s\u00e3o extra\u00eddos do Sync Gateway. Voc\u00ea far\u00e1 isso usando um LiveQuery<\/strong> no lugar de um Consulta<\/strong>. Atualizar o consultarCidades<\/strong> para o seguinte:<\/p>\n\r\nprivate void queryCities() {\r\n final Query query = database.getView(CITIES_VIEW).createQuery();\r\n query.setGroupLevel(1);\r\n LiveQuery liveQuery = query.toLiveQuery();\r\n liveQuery.addChangeListener(new LiveQuery.ChangeListener() {\r\n @Override\r\n public void changed(LiveQuery.ChangeEvent event) {\r\n try {\r\n QueryEnumerator enumeration = query.run();\r\n for (QueryRow row : enumeration) {\r\n Log.d(\"CityExplorer\", \"Row is \" + row.getValue() + \" and key \" + row.getKey());\r\n }\r\n } catch (CouchbaseLiteException e) {\r\n e.printStackTrace();\r\n }\r\n }\r\n });\r\n liveQuery.start();\r\n}<\/code><\/pre>\nAt\u00e9 o momento, voc\u00ea deve ter 20 documentos no Sync Gateway e pode verificar isso no painel do administrador. Reinicie o aplicativo e isso criar\u00e1 o documento de perfil e o enviar\u00e1 ao Sync Gateway para importar 20 locais em torno da localiza\u00e7\u00e3o do usu\u00e1rio. Isso resultar\u00e1 na adi\u00e7\u00e3o de 20 novos locais ao Sync Gateway:
Altera\u00e7\u00e3o da fun\u00e7\u00e3o de sincroniza\u00e7\u00e3o<\/h2>\n At\u00e9 agora, voc\u00ea tem seguido o tutorial sem criar usu\u00e1rios. Ou seja, todos os dispositivos m\u00f3veis que se conectam ao Sync Gateway recebem os mesmos documentos. Isso n\u00e3o \u00e9 gerenci\u00e1vel \u00e0 medida que o tamanho dos dados aumenta. Al\u00e9m disso, se um usu\u00e1rio estiver localizado em Saint-\u00c9tienne-de-Tin\u00e9e, n\u00e3o h\u00e1 necessidade de sincronizar lugares em Londres com o dispositivo dele. Para adicionar essa filtragem de documentos por dispositivo, voc\u00ea far\u00e1 duas coisas:<\/p>\n
\nCrie usu\u00e1rios e autentique-se como um usu\u00e1rio espec\u00edfico.<\/li>\n Atualize a fun\u00e7\u00e3o de sincroniza\u00e7\u00e3o para dar a um determinado usu\u00e1rio acesso aos documentos na cidade em que ele est\u00e1 localizado.<\/li>\n<\/ul>\nPara criar um usu\u00e1rio, voc\u00ea usar\u00e1 o curl para enviar uma solicita\u00e7\u00e3o POST na porta de administra\u00e7\u00e3o:<\/p>\n
\r\n$ curl -vX POST :4985\/db\/_user\/ \r\n -H 'Content-Type: application\/json' \r\n -d '{\"name\": \"james\", \"password\": \"letmein\"}'<\/code><\/pre>\nNo aplicativo Android, atualize o startSync<\/code> m\u00e9todo em SyncManager.java<\/strong> com o autenticador b\u00e1sico passando as mesmas credenciais:<\/p>\n\r\nprivate void startSync() {\r\n URL url = null;\r\n try {\r\n url = new URL(SYNC_URL);\r\n } catch (MalformedURLException e) {\r\n e.printStackTrace();\r\n }\r\n Authenticator authenticator = new BasicAuthenticator(\"james\", \"letmein\");\r\n \r\n Replication push = database.createPushReplication(url);\r\n push.setContinuous(true);\r\n push.setAuthenticator(authenticator);\r\n push.start();\r\n \r\n Replication pull = database.createPullReplication(url);\r\n pull.setContinuous(true);\r\n pull.setAuthenticator(authenticator);\r\n pull.start();\r\n}<\/code><\/pre>\nNavegue at\u00e9 a se\u00e7\u00e3o Sincroniza\u00e7\u00e3o<\/strong> no painel de controle do administrador: https:\/\/localhost:4985\/_admin\/db\/db\/syncUpdate a fun\u00e7\u00e3o Sync com o seguinte:<\/p>\n\r\nfunction(doc, oldDoc) {\r\n if (doc.type == \"profile\") {\r\n channel(doc.city);\r\n access(doc._id, doc.city);\r\n } else if (doc.type == \"city\") {\r\n channel(doc.city);\r\n }\r\n }<\/code><\/pre>\nEm seguida, clique no \u00edcone Modo de visualiza\u00e7\u00e3o ao vivo<\/strong> e o banner superior dever\u00e1 ficar amarelo.ressincroniza\u00e7\u00e3o<\/strong> na se\u00e7\u00e3o a seguir.<\/p>\nRessincroniza\u00e7\u00e3o<\/h2>\n Sempre que voc\u00ea modificar a fun\u00e7\u00e3o Sync, certifique-se de chamar a fun\u00e7\u00e3o _resync<\/strong> para recalcular as regras de acesso ao canal para todos os documentos existentes no banco de dados:<\/p>\n\r\n$ curl -vX POST https:\/\/localhost:4985\/db\/_resync<\/code><\/pre>\nExclua o aplicativo e reinicie-o. Dessa vez, voc\u00ea ver\u00e1 apenas os 20 locais no LogCat porque o usu\u00e1rio est\u00e1 localizado em Saint-\u00c9tienne-de-Tin\u00e9e<\/strong> e esse usu\u00e1rio n\u00e3o tem acesso ao Londres<\/strong> e, portanto, n\u00e3o obter\u00e1 esses documentos.Conclus\u00e3o<\/h2>\n Neste tutorial, voc\u00ea aprendeu a usar um webhook para importar documentos de uma API de terceiros para o Sync Gateway usando um App Server. Voc\u00ea tamb\u00e9m usou o ressincroniza\u00e7\u00e3o<\/strong> ao alterar sua Sync Function para atualizar o acesso aos canais.<\/object><\/object><\/object><\/object><\/code><\/p>","protected":false},"excerpt":{"rendered":"With new tools such as Android Public Beta Testing and Testflight for iOS, shipping new updates of a native mobile application more regularly is a growing trend. In addition to changing the business logic and data models more regularly, there […]<\/p>","protected":false},"author":51,"featured_media":13873,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1810],"tags":[],"ppma_author":[9028],"class_list":["post-1971","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-couchbase-mobile"],"acf":[],"yoast_head":"\n
Ship an update to your Android app with Couchbase Mobile<\/title>\n<meta name=\"description\" content=\"Change read access in the Sync Function & replicating the changes to an Android app. Check how to ship an update to your Android app with Couchbase Mobile.\" \/>\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\/pt\/couchbase-mobile-changing-read-access-in-the-sync-function-and-replicating-the-changes-to-an-android-app\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Couchbase Mobile: Changing read access in the Sync Function and replicating the changes to an Android app\" \/>\n<meta property=\"og:description\" content=\"Change read access in the Sync Function & replicating the changes to an Android app. Check how to ship an update to your Android app 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<\/p>\n![](\"\/wp-content\/original-assets\/2015\/september\/couchbase-mobile-changing-read-access-in-the-sync-function-and-replicating-the-changes-to-an-android-app\/admin_ui_london_places.png\")
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