Android Realtime Library

DroidKaigi 2017
「Androidリアルタイム通信アプリ作成Tips」
のスライドです。

Transcript

1. Android Realtime Libraries Fumihiko Shiroyama https://speakerdeck.com/srym/android-realtime-library
2. About Me • Fumihiko Shiroyama • Android App Developer • Nikkei Inc. • https://github.com/srym • https://twitter.com/fushiroyama
3. Realtime Apps
4. https://github.com/srym/FirebaseRealTimeChat
5. https://realm.io/news/introducing-realm-mobile-platform/
6. Realtime Apps' Upsides
7. Realtime Apps' Upsides • Enables Rich User Interaction • Server Side Message Pushing • No Pull-To-Refresh
8. Realtime Apps' Downsides
9. Realtime Apps' Downsides • Connection Problems • Dealing with Poor Signal • Hassle with Retransmission • Complex Infrastructure • Proxy Problems etc, etc...
10. Realtime Libraries
11. Realtime Libraries • WebSocket
12. Realtime Libraries • WebSocket • Firebase Realtime Database
13. Realtime Libraries • WebSocket • Firebase Realtime Database • Realm Mobile Platform
14. WebSocket
15. WebSocket 8FC4PDLFU
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16. WebSocket 4FOE
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    $MJFOU send "hello"
17. WebSocket 4FOE
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    $MJFOU send "hello" send "hello"
18. WebSocket 4FOE
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19. WebSocket • https://tools.ietf.org/html/rfc6455 • HTTP Upgrade
20. WebSocket GET /chat HTTP/1.1 Host: server.example.com Upgrade: websocket Connection: Upgrade Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ== Origin: http://example.com Sec-WebSocket-Protocol: chat, superchat Sec-WebSocket-Version: 13
21. WebSocket GET /chat HTTP/1.1 Host: server.example.com Upgrade: websocket Connection: Upgrade Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ== Origin: http://example.com Sec-WebSocket-Protocol: chat, superchat Sec-WebSocket-Version: 13
22. WebSocket • https://tools.ietf.org/html/rfc6455 • HTTP Upgrade • Light-Weight & Efficient • Minimum 2KB Header + Payload • Keeping Connection
23. OkHttp Supports WebSocket
24. Try it!
25. WebSocket Server • https://github.com/theturtle32/WebSocket-Node • $ npm install websocket • https://github.com/theturtle32/WebSocket- Node#server-example • $ node server-example.js
26. WebSocket Server • https://github.com/theturtle32/WebSocket-Node • $ npm install websocket • https://github.com/theturtle32/WebSocket- Node#server-example • $ node server-example.js 8IBUFWFS
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27. build.gradle dependencies { compile 'com.squareup.okhttp3:okhttp:3.6.0' }
28. WebSocketListener WebSocketListener listener = new WebSocketListener() { @Override public void onOpen(WebSocket ws, Response res) {} @Override public void onClosing(WebSocket ws, int code, String reason) {} @Override public void onClosed(WebSocket ws, int code, String reason) {} @Override public void onFailure(WebSocket ws, Throwable t, Response res) {} @Override public void onMessage(WebSocket ws, final String text) {} @Override public void onMessage(WebSocket ws, ByteString bytes) {} };
29. WebSocketListener WebSocketListener listener = new WebSocketListener() { @Override public void onOpen(WebSocket ws, Response res) {} @Override public void onClosing(WebSocket ws, int code, String reason) {} @Override public void onClosed(WebSocket ws, int code, String reason) {} @Override public void onFailure(WebSocket ws, Throwable t, Response res) {} @Override public void onMessage(WebSocket ws, final String text) {} @Override public void onMessage(WebSocket ws, ByteString bytes) {} };
30. WebSocketListener @Override public void onMessage(WebSocket ws, final String text) { Log.d(TAG, "onMessage(text): " + text); } @Override public void onMessage(WebSocket ws, ByteString bytes) { Log.d(TAG, "onMessage(binary)"); }
31. WebSocketListener @Override public void onMessage(WebSocket ws, final String text) { Log.d(TAG, "onMessage(text): " + text); } @Override public void onMessage(WebSocket ws, ByteString bytes) { Log.d(TAG, "onMessage(binary)"); } 5FYU #JOBSZ
32. OkHttpClient client = new OkHttpClient(); Request request = new Request.Builder() .url("ws://example.com:8080") .build(); final WebSocket webSocket = client.newWebSocket(request, listener); // Trigger shutdown of the dispatcher's executor // so this process can exit cleanly. client.dispatcher().executorService().shutdown(); WebSocket
33. OkHttpClient client = new OkHttpClient(); Request request = new Request.Builder() .url("ws://example.com:8080") .build(); final WebSocket webSocket = client.newWebSocket(request, listener); // Trigger shutdown of the dispatcher's executor // so this process can exit cleanly. client.dispatcher().executorService().shutdown(); WebSocket
34. OkHttpClient client = new OkHttpClient(); Request request = new Request.Builder() .url("ws://example.com:8080") .build(); final WebSocket webSocket = client.newWebSocket(request, listener); // Trigger shutdown of the dispatcher's executor // so this process can exit cleanly. client.dispatcher().executorService().shutdown(); WebSocket
35. WebSocket OkHttpClient client = new OkHttpClient(); Request request = new Request.Builder() .url("ws://example.com:8080") .build(); final WebSocket webSocket = client.newWebSocket(request, listener); // Trigger shutdown of the dispatcher's executor // so this process can exit cleanly. client.dispatcher().executorService().shutdown();
36. send button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { webSocket.send("message"); } });
37. send button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { webSocket.send("message"); } });
38. send button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { webSocket.send("message"); } });
39. send JSON
40. Message public class Message { @SerializedName("sender_id") public final long senderId; @SerializedName("message") public final String message; public Message(long senderId, String message) { this.senderId = senderId; this.message = message; } }
41. send JSON dependencies { compile 'com.squareup.okhttp3:okhttp:3.6.0' compile 'com.google.code.gson:gson:2.8.0' }
42. send JSON dependencies { compile 'com.squareup.okhttp3:okhttp:3.6.0' compile 'com.google.code.gson:gson:2.8.0' }
43. send JSON button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Message message = new Message(1234, "hi there!"); webSocket.send(gson.toJson(message)); } });
44. send JSON button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Message message = new Message(1234, "hi there!"); webSocket.send(gson.toJson(message)); } });
45. send JSON button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Message message = new Message(1234, "hi there!"); webSocket.send(gson.toJson(message)); } });
46. receive Message @Override public void onMessage(WebSocket ws, final String text) { Message message = gson.fromJson(text, Message.class); Log.d(TAG, "onMessage(text): " + message.toString()); }
47. receive Message @Override public void onMessage(WebSocket ws, final String text) { Message message = gson.fromJson(text, Message.class); Log.d(TAG, "onMessage(text): " + message.toString()); }
48. WebSocket Tips
49. WebSocket Tips • WebSocket does NOT have any room, namespace mechanism. • WebSocket does NOT support broadcasting out of the box.
50. WebSocket Tips • WebSocket does NOT have any room, namespace mechanism. • WebSocket does NOT support broadcasting out of the box. 4PNF
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51. WebSocket Server wsServer.on('request', function(request) { var connection = request.accept(); connection.on('message', function(message) { if (message.type === 'utf8') { wsServer.broadcastUTF(message.utf8Data); } else if (message.type === 'binary') { wsServer.broadcastBytes(message.binaryData); } }); }
52. WebSocket Server wsServer.on('request', function(request) { var connection = request.accept(); connection.on('message', function(message) { if (message.type === 'utf8') { wsServer.broadcastUTF(message.utf8Data); } else if (message.type === 'binary') { wsServer.broadcastBytes(message.binaryData); } }); }
53. WebSocket Server wsServer.on('request', function(request) { var connection = request.accept(); connection.on('message', function(message) { if (message.type === 'utf8') { wsServer.broadcastUTF(message.utf8Data); } else if (message.type === 'binary') { wsServer.broadcastBytes(message.binaryData); } }); }
54. WebSocket Server wsServer.on('request', function(request) { var connection = request.accept(); connection.on('message', function(message) { if (message.type === 'utf8') { wsServer.broadcastUTF(message.utf8Data); } else if (message.type === 'binary') { wsServer.broadcastBytes(message.binaryData); } }); }
55. WebSocket Tips • WebSocket does NOT have any room, namespace mechanism. • WebSocket does NOT support broadcasting out of the box. • You can use socket.io for room, namespace, connection retry, fallbacks etc...
56. Summary
57. Good Points • Simple and Open and Free • Server Hook Point • Binary Support • Can Scale • Redis Pub/Sub
58. Bad Points • No Offline Support • No rooms / namespaces • No Broadcasting
59. Firebase Realtime Database
60. Realtime Database 3FNPUF
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61. Realtime Database 3FNPUF
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62. Realtime Database 3FNPUF
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63. Realtime Database 3FNPUF
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64. Realtime Database • by Google • Every client looks at Local Database • Offline Support! • Data are synced transparently • Handy and robust Security Rule • Don't worry about scaling
65. Data Structure
66. Data Structure • No SQL • JSON Tree • No "Columns" or "Relations"
67. Data Structure { "messages": { "one": { "m1": { "name": "eclarke", "message": "The relay seems to be malfunctioning.", "timestamp": 1459361875337 }, "m2": { ... }, "m3": { ... } }, "two": { ... }, "three": { ... } } } .FTTBHF
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68. Data Structure { "messages": { "one": { "m1": { "name": "eclarke", "message": "The relay seems to be malfunctioning.", "timestamp": 1459361875337 }, "m2": { ... }, "m3": { ... } }, "two": { ... }, "three": { ... } } } $IBU
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69. Data Structure { "messages": { "one": { "m1": { "name": "shiroyama", "message": "Hello Everyone!", "timestamp": 1459361875337 }, "m2": { ... }, "m3": { ... } }, "two": { ... }, "three": { ... } } } Hello Everyone!
70. Data Structure { "messages": { "one": { "m1": { "name": "shiroyama", "message": "Hello Everyone!", "timestamp": 1459361875337 }, "m2": { ... }, "m3": { ... } }, "two": { ... }, "three": { ... } } } Hello Everyone!
71. Data Structure { "chats": { "one": { "title": "Room 1", "lastMessage": "shiroyama: Hello Everyone!", "timestamp": 1459361875666 }, "two": { ... }, "three": { ... } }, "members": { "one": { "shiroyama": true, "tanaka": true }, "two": { ... }, "three": { ... } }, "messages": { "one": { "m1": { "name": "shiroyama", "message": "Hello Everyone!", "timestamp": 1459361875337 }, "m2": { ... }, "m3": { ... } } } }
72. Data Structure { "chats": { "one": { "title": "Room 1", "lastMessage": "shiroyama: Hello Everyone!", "timestamp": 1459361875666 }, "two": { ... }, "three": { ... } }, "members": { "one": { "shiroyama": true, "tanaka": true }, "two": { ... }, "three": { ... } }, "messages": { "one": { "m1": { "name": "shiroyama", "message": "Hello Everyone!", "timestamp": 1459361875337 }, "m2": { ... }, "m3": { ... } } } } EFOPSNBMJ[JOH
73. Data Structure { "chats": { "one": { "title": "Room 1", "lastMessage": "shiroyama: Hello Everyone!", "timestamp": 1459361875666 }, "two": { ... }, "three": { ... } }, "members": { "one": { "shiroyama": true, "tanaka": true }, "two": { ... }, "three": { ... } }, "messages": { "one": { "m1": { "name": "shiroyama", "message": "Hello Everyone!", "timestamp": 1459361875337 }, "m2": { ... }, "m3": { ... } } } } EFOPSNBMJ[JOH
74. Security Rules
75. Security Rules { "rules": { "messages": { ".read": true, ".write": "auth != null" } } }
76. Security Rules { "rules": { "messages": { ".read": true, ".write": "auth != null" } } }
77. Security Rules { "rules": { "messages": { ".read": true, ".write": "auth != null" } } }
78. Security Rules { "rules": { "messages": { ".read": true, ".write": "auth != null" } } }
79. • https://firebase.google.com/docs/database/security/ • .read, .write, .validate • Predefined Variables • https://firebase.google.com/docs/database/security/ securing-data?hl=en#predefined_variables Security Rules
80. Client Side
81. Install Firebase Plugin
82. Connect Realtime Database
83. Add Realtime Database https://firebase.google.com/docs/database/android/start/
84. google-services.json
85. Firebase Console https://console.firebase.google.com/
86. Database Reference FirebaseDatabase database = FirebaseDatabase.getInstance(); DatabaseReference messages = database.getReference("messages");
87. Database Reference FirebaseDatabase database = FirebaseDatabase.getInstance(); DatabaseReference messages = database.getReference("messages");
88. Database Reference FirebaseDatabase database = FirebaseDatabase.getInstance(); DatabaseReference messages = database.getReference("messages"); NFTTBHFT
89. Message @IgnoreExtraProperties public class Message { private String name; private String message; private long timestamp; public Message() { } // getters and setters }
90. Send Message button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Message message = new Message(); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); messages.push().setValue(message); } });
91. Send Message button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Message message = new Message(); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); messages.push().setValue(message); } });
92. Send Message button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Message message = new Message(); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); messages.push().setValue(message); } });
93. Send Message button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Message message = new Message(); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); messages.push().setValue(message); } }); QVTI
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94. { "messages": { "one": { "-Kei_CdbvKoms35KcA8p": { "name": "shiroyama", "message": "Hello Everyone!", "timestamp": 1459361875337 }, "m2": { ... }, "m3": { ... } }, "two": { ... }, "three": { ... } } } Hello Everyone! Send Message
95. { "messages": { "one": { "-Kei_CdbvKoms35KcA8p": { "name": "shiroyama", "message": "Hello Everyone!", "timestamp": 1459361875337 }, "m2": { ... }, "m3": { ... } }, "two": { ... }, "three": { ... } } } Hello Everyone! HFOFSBUFE
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96. Send Message button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Message message = new Message(); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); messages.push().setValue(message); } });
97. Send Message button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Message message = new Message(); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); messages.push().setValue(message); } }); XSJUF
98. Send Message
99. ChildEventListener listener = new ChildEventListener() { @Override public void onChildAdded(DataSnapshot snap, String s) {} @Override public void onChildChanged(DataSnapshot snap, String s) {} @Override public void onChildRemoved(DataSnapshot snap) {} @Override public void onChildMoved(DataSnapshot snap, String s) {} @Override public void onCancelled(DatabaseError error) {} }; messages.addChildEventListener(listener); Receive Message
100. ChildEventListener listener = new ChildEventListener() { @Override public void onChildAdded(DataSnapshot snap, String s) {} @Override public void onChildChanged(DataSnapshot snap, String s) {} @Override public void onChildRemoved(DataSnapshot snap) {} @Override public void onChildMoved(DataSnapshot snap, String s) {} @Override public void onCancelled(DatabaseError error) {} }; messages.addChildEventListener(listener); Receive Message
101. ChildEventListener listener = new ChildEventListener() { @Override public void onChildAdded(DataSnapshot snap, String s) {} @Override public void onChildChanged(DataSnapshot snap, String s) {} @Override public void onChildRemoved(DataSnapshot snap) {} @Override public void onChildMoved(DataSnapshot snap, String s) {} @Override public void onCancelled(DatabaseError error) {} }; messages.addChildEventListener(listener); Receive Message
102. ChildEventListener listener = new ChildEventListener() { @Override public void onChildAdded(DataSnapshot snap, String s) {} @Override public void onChildChanged(DataSnapshot snap, String s) {} @Override public void onChildRemoved(DataSnapshot snap) {} @Override public void onChildMoved(DataSnapshot snap, String s) {} @Override public void onCancelled(DatabaseError error) {} }; messages.addChildEventListener(listener); Receive Message
103. onChildAdded() @Override public void onChildAdded(DataSnapshot snap, String s) { Message message = snap.getValue(Message.class); Log.d(TAG, message.getMessage()); }
104. onChildAdded() @Override public void onChildAdded(DataSnapshot snap, String s) { Message message = snap.getValue(Message.class); Log.d(TAG, message.getMessage()); }
105. onChildAdded() @Override public void onChildAdded(DataSnapshot snap, String s) { Message message = snap.getValue(Message.class); Log.d(TAG, message.getMessage()); } 5ZQF
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106. onChildAdded() D/Message: Hello Everyone! D/Message: How are you today?
107. Sort and Filter messages.orderByChild("timestamp") .limitToFirst(50); messages.addChildEventListener(listener);
108. Sort and Filter messages.orderByChild("timestamp") .limitToFirst(50); messages.addChildEventListener(listener);
109. Sort and Filter messages.orderByChild("timestamp") .limitToFirst(50); messages.addChildEventListener(listener);
110. Remove Listener @Override protected void onPause() { messages.removeEventListener(listener); super.onPause(); }
111. Remove Listener @Override protected void onPause() { messages.removeEventListener(listener); super.onPause(); }
112. • ValueEventListener • Fetch single item / at once • ChildEventListener • Fetch from list (add/change/remove/move) • https://firebase.google.com/docs/database/android/ read-and-write Listeners
113. • Pull-to-Refresh • ValueEvent is triggered at last • Desc Ordering • setPrioritiy(timestamp * -1) • or create "desc_timestamp" property Realtime Database Tips
114. • srym/FirebaseRealTimeChat • https://github.com/srym/FirebaseRealTimeChat • Realtime Database • Cloud Storage • Remote Config Realtime Database Sample
115. Summary
116. Good Points • Offline Support and Sync • Easy and Robust Security Rules • Good Interaction with other Firebase services • Easy to scale
117. Bad Points • No binary support • No server hook point • No source code! • Tricky ordering limitation • Storage and Traffic fee could be expensive
118. Realm Mobile Platform
119. • Alternative to SQLite and Core Data • ORMapper • Cross Platform • https://realm.io/products/realm-mobile-database/ Realm Mobile Database
120. Try it!
121. Project's build.gradle buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:2.2.3' classpath 'io.realm:realm-gradle-plugin:3.0.0' } }
122. Project's build.gradle buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:2.2.3' classpath 'io.realm:realm-gradle-plugin:3.0.0' } }
123. App's build.gradle apply plugin: 'com.android.application' apply plugin: 'realm-android' android { }
124. App's build.gradle apply plugin: 'com.android.application' apply plugin: 'realm-android' android { }
125. Custom Application public class MyApplication extends Application { @Override public void onCreate() { super.onCreate(); Realm.init(this); RealmLog.setLevel(Log.VERBOSE); } }
126. Custom Application public class MyApplication extends Application { @Override public void onCreate() { super.onCreate(); Realm.init(this); RealmLog.setLevel(Log.VERBOSE); } }
127. Custom Application public class MyApplication extends Application { @Override public void onCreate() { super.onCreate(); Realm.init(this); RealmLog.setLevel(Log.VERBOSE); } }
128. Message Model public class Message extends RealmObject { private String name; private String message; private long timestamp; public Message() { } // getters & setters }
129. Message Model public class Message extends RealmObject { private String name; private String message; private long timestamp; public Message() { } // getters & setters }
130. Message Model public class Message extends RealmObject { private String name; private String message; private long timestamp; public Message() { } // getters & setters } OFDFTTBSZ
131. Message Model public class Message extends RealmObject { private String name; private String message; private long timestamp; public Message() { } // getters & setters } OFDFTTBSZ QSPYZ
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132. Write to Realm button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Realm realm = Realm.getDefaultInstance(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { final Message message = realm.createObject(Message.class); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); } }); } });
133. Write to Realm button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Realm realm = Realm.getDefaultInstance(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { final Message message = realm.createObject(Message.class); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); } }); } });
134. Write to Realm button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Realm realm = Realm.getDefaultInstance(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { final Message message = realm.createObject(Message.class); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); } }); } });
135. Write to Realm button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Realm realm = Realm.getDefaultInstance(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { final Message message = realm.createObject(Message.class); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); } }); } });
136. Write to Realm button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Realm realm = Realm.getDefaultInstance(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { final Message message = realm.createObject(Message.class); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); } }); } });
137. Write to Realm final Message message = new Message(); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); Realm realm = Realm.getDefaultInstance(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { realm.copyToRealm(message); } });
138. or
139. Write to Realm final Message message = new Message(); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); Realm realm = Realm.getDefaultInstance(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { realm.copyToRealm(message); } });
140. Write to Realm final Message message = new Message(); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); Realm realm = Realm.getDefaultInstance(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { realm.copyToRealm(message); } });
141. Write to Realm final Message message = new Message(); message.setName(name); message.setMessage(text); message.setTimestamp(timestamp); Realm realm = Realm.getDefaultInstance(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { realm.copyToRealm(message); } });
142. • Realm#executeTransaction • Realm#executeTransactionAsync Write to Realm
143. Read from Realm Realm realm = Realm.getDefaultInstance(); RealmResults<Message> messages = realm .where(Message.class) .findAll(); if (!messages.isEmpty()) { for (Message message : messages) { Log.d(TAG, "message: " + message.getMessage()); } }
144. Read from Realm Realm realm = Realm.getDefaultInstance(); RealmResults<Message> messages = realm .where(Message.class) .findAll(); if (!messages.isEmpty()) { for (Message message : messages) { Log.d(TAG, "message: " + message.getMessage()); } }
145. Read from Realm Realm realm = Realm.getDefaultInstance(); RealmResults<Message> messages = realm .where(Message.class) .findAll(); if (!messages.isEmpty()) { for (Message message : messages) { Log.d(TAG, "message: " + message.getMessage()); } }
146. Read from Realm Realm realm = Realm.getDefaultInstance(); RealmResults<Message> messages = realm .where(Message.class) .findAll(); if (!messages.isEmpty()) { for (Message message : messages) { Log.d(TAG, "message: " + message.getMessage()); } }
147. Read from Realm Realm realm = Realm.getDefaultInstance(); RealmResults<Message> messages = realm .where(Message.class) .findAll(); if (!messages.isEmpty()) { for (Message message : messages) { Log.d(TAG, "message: " + message.getMessage()); } }
148. Change Listener RealmChangeListener<RealmResults<Message>> changListener = new RealmChangeListener<RealmResults<Message>>() { @Override public void onChange(RealmResults<Message> element) { for (Message msg : element) { Log.d(TAG, "message: " + msg.getMessage()); } } }; messages.addChangeListener(changListener);
149. Change Listener RealmChangeListener<RealmResults<Message>> changListener = new RealmChangeListener<RealmResults<Message>>() { @Override public void onChange(RealmResults<Message> element) { for (Message msg : element) { Log.d(TAG, "message: " + msg.getMessage()); } } }; messages.addChangeListener(changListener);
150. Change Listener RealmChangeListener<RealmResults<Message>> changListener = new RealmChangeListener<RealmResults<Message>>() { @Override public void onChange(RealmResults<Message> element) { for (Message msg : element) { Log.d(TAG, "message: " + msg.getMessage()); } } }; messages.addChangeListener(changListener);
151. Realm Browser
152. Realm Mobile Platform
153. Realm Mobile Platform Image from https://realm.io/news/introducing-realm-mobile-platform/
154. • Offline Support • Realtime Sync • Authentication • Access Control Realm Mobile Platform
155. 3FBMN
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156. 3FBMN
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159. Realm Object Server
160. • https://realm.io/docs/realm-object-server/ • macOS • RHEL/CentOS 6 • Ubuntu 16.04 • AWS/AMI • Developer Edition is FREE Realm Object Server
161. • Ubuntu 16.04 • curl -s https://packagecloud.io/install/repositories/realm/realm/ script.deb.sh | sudo bash • sudo apt-get update • sudo apt-get install realm-object-server-developer • sudo systemctl enable realm-object-server • sudo systemctl start realm-object-server Realm Object Server
162. • http://<YOUR-SERVER>:9080/#!/setup Realm Object Server
163. Realm Browser cat /etc/realm/admin_token.base64
164. Client Side Modification
165. App's build.gradle apply plugin: 'com.android.application' apply plugin: 'realm-android' android { } realm { syncEnabled = true }
166. App's build.gradle apply plugin: 'com.android.application' apply plugin: 'realm-android' android { } realm { syncEnabled = true }
167. Login final SyncCredentials cred = SyncCredentials.usernamePassword(ID, PASSWORD, true); SyncUser.loginAsync(cred, AUTH_URL, new SyncUser.Callback() { @Override public void onSuccess(SyncUser user) { final SyncConfiguration syncConfiguration = new SyncConfiguration.Builder(user, REALM_URL).build(); Realm.setDefaultConfiguration(syncConfiguration); realm = Realm.getDefaultInstance(); } @Override public void onError(ObjectServerError error) {} });
168. Login final SyncCredentials cred = SyncCredentials.usernamePassword(ID, PASSWORD, true); SyncUser.loginAsync(cred, AUTH_URL, new SyncUser.Callback() { @Override public void onSuccess(SyncUser user) { final SyncConfiguration syncConfiguration = new SyncConfiguration.Builder(user, REALM_URL).build(); Realm.setDefaultConfiguration(syncConfiguration); realm = Realm.getDefaultInstance(); } @Override public void onError(ObjectServerError error) {} }); $SFBUF
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169. Login final SyncCredentials cred = SyncCredentials.usernamePassword(ID, PASSWORD, true); SyncUser.loginAsync(cred, AUTH_URL, new SyncUser.Callback() { @Override public void onSuccess(SyncUser user) { final SyncConfiguration syncConfiguration = new SyncConfiguration.Builder(user, REALM_URL).build(); Realm.setDefaultConfiguration(syncConfiguration); realm = Realm.getDefaultInstance(); } @Override public void onError(ObjectServerError error) {} });
170. Login final SyncCredentials cred = SyncCredentials.usernamePassword(ID, PASSWORD, true); SyncUser.loginAsync(cred, AUTH_URL, new SyncUser.Callback() { @Override public void onSuccess(SyncUser user) { final SyncConfiguration syncConfiguration = new SyncConfiguration.Builder(user, REALM_URL).build(); Realm.setDefaultConfiguration(syncConfiguration); realm = Realm.getDefaultInstance(); } @Override public void onError(ObjectServerError error) {} });
171. Login final SyncCredentials cred = SyncCredentials.usernamePassword(ID, PASSWORD, true); SyncUser.loginAsync(cred, AUTH_URL, new SyncUser.Callback() { @Override public void onSuccess(SyncUser user) { final SyncConfiguration syncConfiguration = new SyncConfiguration.Builder(user, REALM_URL).build(); Realm.setDefaultConfiguration(syncConfiguration); realm = Realm.getDefaultInstance(); } @Override public void onError(ObjectServerError error) {} });
172. Login final SyncCredentials cred = SyncCredentials.usernamePassword(ID, PASSWORD, true); SyncUser.loginAsync(cred, AUTH_URL, new SyncUser.Callback() { @Override public void onSuccess(SyncUser user) { final SyncConfiguration syncConfiguration = new SyncConfiguration.Builder(user, REALM_URL).build(); Realm.setDefaultConfiguration(syncConfiguration); realm = Realm.getDefaultInstance(); } @Override public void onError(ObjectServerError error) {} });
173. Login final SyncCredentials cred = SyncCredentials.usernamePassword(ID, PASSWORD, true); SyncUser.loginAsync(cred, AUTH_URL, new SyncUser.Callback() { @Override public void onSuccess(SyncUser user) { final SyncConfiguration syncConfiguration = new SyncConfiguration.Builder(user, REALM_URL).build(); Realm.setDefaultConfiguration(syncConfiguration); realm = Realm.getDefaultInstance(); } @Override public void onError(ObjectServerError error) {} });
174. That's all!
175. Fine-grained Collection Notification OrderedRealmCollectionChangeListener<RealmResults<Message>> listener = new OrderedRealmCollectionChangeListener<RealmResults<Message>>() { @Override public void onChange(RealmResults<Message> collection, OrderedCollectionChangeSet changeSet) { } };
176. Fine-grained Collection Notification OrderedRealmCollectionChangeListener<RealmResults<Message>> listener = new OrderedRealmCollectionChangeListener<RealmResults<Message>>() { @Override public void onChange(RealmResults<Message> collection, OrderedCollectionChangeSet changeSet) { } };
177. Fine-grained Collection Notification OrderedRealmCollectionChangeListener<RealmResults<Message>> listener = new OrderedRealmCollectionChangeListener<RealmResults<Message>>() { @Override public void onChange(RealmResults<Message> collection, OrderedCollectionChangeSet changeSet) { } };
178. Fine-grained Collection Notification public void onChange(RealmResults<Message> collection, OrderedCollectionChangeSet changeSet) { OrderedCollectionChangeSet.Range[] insertions = changeSet.getInsertionRanges(); for (OrderedCollectionChangeSet.Range insertion : insertions) { int index = insertion.startIndex; int length = insertion.length; for (int i = index; i < index + length; i++) { Message message = collection.get(i); Log.d(TAG, "message: " + message.getMessage()); } } } messages.addChangeListener(realmChangeListener);
179. Fine-grained Collection Notification public void onChange(RealmResults<Message> collection, OrderedCollectionChangeSet changeSet) { OrderedCollectionChangeSet.Range[] insertions = changeSet.getInsertionRanges(); for (OrderedCollectionChangeSet.Range insertion : insertions) { int index = insertion.startIndex; int length = insertion.length; for (int i = index; i < index + length; i++) { Message message = collection.get(i); Log.d(TAG, "message: " + message.getMessage()); } } } messages.addChangeListener(realmChangeListener);
180. Fine-grained Collection Notification public void onChange(RealmResults<Message> collection, OrderedCollectionChangeSet changeSet) { OrderedCollectionChangeSet.Range[] insertions = changeSet.getInsertionRanges(); for (OrderedCollectionChangeSet.Range insertion : insertions) { int index = insertion.startIndex; int length = insertion.length; for (int i = index; i < index + length; i++) { Message message = collection.get(i); Log.d(TAG, "message: " + message.getMessage()); } } } messages.addChangeListener(realmChangeListener);
181. Fine-grained Collection Notification public void onChange(RealmResults<Message> collection, OrderedCollectionChangeSet changeSet) { OrderedCollectionChangeSet.Range[] insertions = changeSet.getInsertionRanges(); for (OrderedCollectionChangeSet.Range insertion : insertions) { int index = insertion.startIndex; int length = insertion.length; for (int i = index; i < index + length; i++) { Message message = collection.get(i); Log.d(TAG, "message: " + message.getMessage()); } } } messages.addChangeListener(realmChangeListener);
182. Fine-grained Collection Notification • https://realm.io/news/realm-java-3-0-collection- notifications/ • Receive detailed callback • Efficient • RealmRecyclerViewAdapter is using this
183. Let others read/write Realm realm = user.getManagementRealm(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { Boolean mayRead = true; Boolean mayWrite = null; boolean mayManage = false; PermissionChange change = new PermissionChange(realmUrl, anotherUserID, mayRead, mayWrite, mayManage); realm.insert(change); } });
184. Let others read/write Realm realm = user.getManagementRealm(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { Boolean mayRead = true; Boolean mayWrite = null; boolean mayManage = false; PermissionChange change = new PermissionChange(realmUrl, anotherUserID, mayRead, mayWrite, mayManage); realm.insert(change); } }); "MMPX
185. Let others read/write Realm realm = user.getManagementRealm(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { Boolean mayRead = true; Boolean mayWrite = null; boolean mayManage = false; PermissionChange change = new PermissionChange(realmUrl, anotherUserID, mayRead, mayWrite, mayManage); realm.insert(change); } }); "T
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186. Let others read/write Realm realm = user.getManagementRealm(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { Boolean mayRead = true; Boolean mayWrite = null; boolean mayManage = false; PermissionChange change = new PermissionChange(realmUrl, anotherUserID, mayRead, mayWrite, mayManage); realm.insert(change); } }); %JTBMMPX
187. Let others read/write Realm realm = user.getManagementRealm(); realm.executeTransaction(new Realm.Transaction() { @Override public void execute(Realm realm) { Boolean mayRead = true; Boolean mayWrite = null; boolean mayManage = false; PermissionChange change = new PermissionChange(realmUrl, anotherUserID, mayRead, mayWrite, mayManage); realm.insert(change); } });
188. Summary
189. Good Points • Offline Support and Sync • Intuitive Query & Relation • You can use this on-premises • Developer Edition is FREE • Server Side Hook is Available on Enterprise Edition • Load Balancing is Available on Enterprise Edition
190. Bad Points • Not really, that much! Great! • No server hook on Developer Edition • Realm MAY affect App's Architecture • Live Object is sometimes tricky
191. Samples • [realm-demos/realm-draw] • https://github.com/realm-demos/realm-draw
192. Which one did you like?
193. Thank You!
194. Thanks • Illustrations by ͍΍͢ͱ΍ • http://www.irasutoya.com/ • Thank you so much!!! • All the audiences! Thank you!