Project

General

Profile

Wiki » History » Version 38

Tomek Dziemidowicz, 2019-07-18 09:13 PM

1 2 Tomek Dziemidowicz
h1. SQLite-sync documentation
2
3
*Owner* : AMPLIFIER sp. z o.o.
4
*Contact* : support (at) ampliapps.com
5
*website* : https://ampliapps.com
6
7 3 Tomek Dziemidowicz
{{>toc}}
8
9 9 Tomek Dziemidowicz
Welcome to the AMPLI-SYNC documentation!
10
We have language bindings in JavaScript, .NET C#, Java and Objective-C! 
11 1 Tomek Dziemidowicz
12 9 Tomek Dziemidowicz
h2. AMPLI-SYNC concept
13
14
h3. Solution diagram
15
16 8 Tomek Dziemidowicz
!{width:700px}SQLite-sync-structure.png!
17 1 Tomek Dziemidowicz
18 13 Tomek Dziemidowicz
* Devices communicate with server using HTTP/HTTPS protocol. 
19
* Proxy Load Balancer. If necessary, proxy can redirect request to another instance of SQLite-core.
20
* Authorization provider will generate token based on response from authorization provider.
21 9 Tomek Dziemidowicz
22
h3. Proxy Balancer flowchart
23
24
!{width:400px}SQLite-sync-proxy-balancer.png!
25
26
h3. Authorization Provider flowchart
27
28
!{width:350px}SQLite-sync-authentication-process.png!
29
30 2 Tomek Dziemidowicz
h2. REST API (server API)
31
32 10 Tomek Dziemidowicz
h3. Protocol version
33
34
This document describes integration with the REST API 3.x protocol.
35
36
h3. Service description
37
38
There are two stages to processing a request:
39
40 12 Tomek Dziemidowicz
* Device places an request.
41
* SQLite-sync server confirms the request has been processed successfully and sends confirmation with eventual conflict list that need to be resolved.
42 10 Tomek Dziemidowicz
43 11 Tomek Dziemidowicz
h3. Synchronization flowchart
44
45
!{width:200px;}Device-synchronization-diagram.png!
46 10 Tomek Dziemidowicz
47 23 Tomek Dziemidowicz
h3. Request URL format
48 22 Tomek Dziemidowicz
49
Sample REST API call:
50
<pre>
51
https://example.com/API3/__method___
52
</pre>
53
Explanation:
54
*https://example.com/* - adres of REST API service 
55
*API3* - version of synchronization
56
*__method___* - method/action
57
58 24 Tomek Dziemidowicz
h3. API methods
59
60 28 Tomek Dziemidowicz
h4. *API3* - control method
61
62
*Method* : GET
63
*Path* : “/API3”
64
*Produces* : TEXT_HTML
65
*Description* : control method. Returns “API[v3] SQLite-Sync.COM is working correctly!” if web service is correctly configured.
66
67 29 Tomek Dziemidowicz
h4. *InitializeSubscriber* - Reinitialize subscriber
68 28 Tomek Dziemidowicz
69
*Method* : GET
70
*Path* : “/InitializeSubscriber/{subscriberUUID}”
71
*Produces* : TEXT_PLAIN
72
*Description* : Reinitialize subscriber, create empty schema on device, prepare master database for new subscriber.
73
74
Implementation examples: 
75 29 Tomek Dziemidowicz
* [[InitializeSubscriber Objective-C]]
76
* [[InitializeSubscriber .NET C#]]
77
* [[InitializeSubscriber JAVA]]
78
* [[InitializeSubscriber JavaScript]]
79 28 Tomek Dziemidowicz
80 25 Tomek Dziemidowicz
h4. *Sync* - gets changes for table
81 26 Tomek Dziemidowicz
82 1 Tomek Dziemidowicz
*Method* : GET
83 26 Tomek Dziemidowicz
*Path* : /Sync/{subscriberUUID}/{tableName}
84 1 Tomek Dziemidowicz
*Produces* : TEXT_PLAIN
85 26 Tomek Dziemidowicz
*Description* : Get changed data. 
86
Params:
87 1 Tomek Dziemidowicz
*subscriberUUID* - identifier of subscriber. By default device unique ID is used. But we can place there any value (also #user.UUID)
88 26 Tomek Dziemidowicz
*tableName* - name of table from database (without schema)
89 1 Tomek Dziemidowicz
Response:
90 26 Tomek Dziemidowicz
<pre><code class="xml">
91
<?xml version="1.0" encoding="utf-8"?>
92
<records>
93
  <r a="1">
94
    <c>2</c>
95
    <c>Document</c>
96
    <c>75541</c>
97
    <c>2014-02-13 00:00:00</c>
98
    <c>665.000</c>
99
    <c>2c93d64e-cc72-11e3-87e0-f82fa8e587f9</c>
100
  </r>
101
  <r a="2">
102
    <c>4</c>
103
    <c>Document 4</c>
104
    <c>4879</c>
105
    <c>2014-04-23 13:44:48</c>
106
    <c>4875.000</c>
107
    <c>2c93d765-cc72-11e3-87e0-f82fa8e587f9</c>
108
  </r>
109
</records>
110
</code></pre>
111
<records> - section contains records 
112
<r a=”1”> - here starts record. 
113
</r> - here record ends
114
Attribute “a” (action type)
115
1 - new record
116
2 - update for record
117 1 Tomek Dziemidowicz
118 27 Tomek Dziemidowicz
Implementation examples: 
119 26 Tomek Dziemidowicz
* [[Objective-C]]
120
* [[.NET C#]]
121
* [[JAVA]]
122
* [[JavaScript]]
123 25 Tomek Dziemidowicz
124 34 Tomek Dziemidowicz
h4. *CommitSync* - control method
125 33 Tomek Dziemidowicz
126
*Method* : GET
127
*Path* : “/CommitSync/{syncId}”
128
*Produces* : TEXT_PLAIN
129
*Description* : If device recieved all changes without error this method should be call to tell server that there was no errors during receiving package. Params: *syncId* - id of data package
130
131
Implementation examples: 
132
* [[CommitSync Objective-C]]
133
* [[CommitSync .NET C#]]
134
* [[CommitSync JAVA]]
135
* [[CommitSync JavaScript]]
136
137 35 Tomek Dziemidowicz
h4. *Send* - control method
138
139 36 Tomek Dziemidowicz
*Method* : POST
140
*Path* : “/Send”
141
*Consumes* : JSON
142
*Produces* : TEXT_PLAIN
143
*Description* : Send changes from device to master database.
144 1 Tomek Dziemidowicz
145 36 Tomek Dziemidowicz
For sample data format with changes see XML code sample.
146
147
Implementation examples: 
148
* [[Send Objective-C]]
149
* [[Send .NET C#]]
150
* [[Send JAVA]]
151
* [[Send JavaScript]]
152 35 Tomek Dziemidowicz
153 37 Tomek Dziemidowicz
[[XML message format]]
154
155 38 Tomek Dziemidowicz
h4. *AddTable* - control method
156
157
*Method* : GET
158
*Path* : “/AddTable/{tableName}”
159
*Produces* : TEXT_PLAIN
160
*Description* : Add table to synchronization.
161
162
Implementation examples: 
163
* [[AddTable Objective-C]]
164
* [[AddTable .NET C#]]
165
* [[AddTable JAVA]]
166
* [[AddTable JavaScript]]
167
168
h4. *RemoveTable* - control method
169
170
*Method* : GET
171
*Path:* “/RemoveTable/{tableName}”
172
*Produces* : TEXT_PLAIN
173
*Description* : Remove table from synchronization.
174
175
Implementation examples: 
176
* [[RemoveTable Objective-C]]
177
* [[RemoveTable .NET C#]]
178
* [[RemoveTable JAVA]]
179
* [[RemoveTable JavaScript]]
180
181 2 Tomek Dziemidowicz
h2. Conflict Resolution
182
183
h2. Update procedure
184
185
h2. Data filtering
186
187 1 Tomek Dziemidowicz
h2. Installation
188 9 Tomek Dziemidowicz
189 18 Tomek Dziemidowicz
h3. Server Prerequisites
190
191
To make ampli-sync server work you need:
192
* Apache Tomcat 8.
193
* Java
194
* Linux/Windows environment. 
195
196 9 Tomek Dziemidowicz
h3. Manual
197
198 14 Tomek Dziemidowicz
Steps needed to install AMPLI-SYNC manually on Ubuntu.
199
200 15 Tomek Dziemidowicz
# Install Tomcat on Ubuntu:
201 14 Tomek Dziemidowicz
https://www.digitalocean.com/community/tutorials/how-to-install-apache-tomcat-8-on-ubuntu-16-04
202
# Create new user
203
<pre>
204
sudo adduser amplisync
205
</pre>
206
System will ask you for password for newly created user.
207
# Add user to group ‘tomcat’
208
<pre>
209
sudo usermod -a -G tomcat amplisync
210
</pre>
211
# Chang in web.xml path variable to 
212
<pre>
213
\home/sqlitesync/demo
214
</pre>
215
# Install new application in Tomcat. Start with switching to amplisync user.
216
<pre>
217
su amplisync
218
</pre>
219
# Create new folder /home/sqlitesync/demo
220 16 Tomek Dziemidowicz
# Upload new service amplisync-demo to Tomcat. You can do that using Tomcat application manager, or you can put WAR file in Tomcat webapps folder. Name of your WAR file is app name in Tomcat environment. Remember to not place spaces and special chars in name of your WAR file.
221 17 Tomek Dziemidowicz
# Restart Tomcat:
222 14 Tomek Dziemidowicz
<pre>
223
service tomcat restart
224
</pre>
225
Now you can access your installation using link:
226
<pre>
227
http://your_ip:8080/amplisync-app-name/API3
228
</pre>
229
# Setup permissions:
230
<pre>
231
chown -R sqlitesync:tomcat /home/amplisync/demo/
232
</pre>
233
234 9 Tomek Dziemidowicz
h3. Docker
235 2 Tomek Dziemidowicz
236 20 Tomek Dziemidowicz
h3. Configuring AMPLI-SYNC service
237 19 Tomek Dziemidowicz
238
First you need to adjust website configuration file (web.xml), then you need to change main configuration file (sync.properties).
239
*Service configuration (web.xml)*
240
Go to your_webapps_folder/SqliteSync/WEB-INF/web.xml and open for edit. Navigate to section:
241
<pre><code class="xml">
242
<env-entry>
243
<env-entry-name>working-dir</env-entry-name>
244
<env-entry-type>java.lang.String</env-entry-type>
245
<env-entry-value>/your/working/dir/sqlite-sync/</env-entry-value>
246
</env-entry>
247
</code></pre>
248
change env-entry-value key and point to working dir where SQLite-sync.com server will store log files, temporary files and configuration. Create manually a subfolder named config. Create a text file sync.properties in folder config. The path should look like this:
249
<pre>
250
\working_dir\config\sync.properties
251
</pre>
252
*IMPORTANT* Restart service after changing web.xml. Make sure that Tomcat has read/write access to working dir.
253
Sample configurations for MySQL server
254
<pre>
255
DB_ENGINE = mysql
256
DBURL = jdbc:mysql://server:3306/dbname?rewriteBatchedStatements=true
257
DBUSER = user
258
DBPASS = pass
259
DBDRIVER = com.mysql.cj.jdbc.Driver
260
DATE_FORMAT = yyyy-MM-dd HH:mm:ss
261
HISTORY_DAYS = 7
262
LOG_LEVEL = 4
263
</pre>
264
If you faced a timezone error after configuration in `sync.properties` add at the end of connection string:
265
<pre>
266
&useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
267
</pre>
268
*Keys explanation*
269 21 Tomek Dziemidowicz
*DB_ENGINE* - type of database engine. Available options:
270
* mysql
271
* mssql
272
* postgresql
273
* oracle
274
275 19 Tomek Dziemidowicz
*LOG_LEVEL* - defain details level for log
276
> 4: TRACE, DEBUG, INFO, WARN; (default)
277
> 3: DEBUG, INFO, WARN; 
278
> 2: INFO,WARN; 
279
> 1: WARN; 
280
> 0 - disable logs
281
*DATE_FORMAT* - set format of date 
282
default format: yyyy-MM-dd HH:mm:ss 
283
*HISTORY_DAYS* - How long files with sync data will be kept
284
default value: 7
285
When you use MySQL database DO NOT remove from the end of the connection string:
286
<pre>
287
?rewriteBatchedStatements=true
288 20 Tomek Dziemidowicz
</pre>
289 19 Tomek Dziemidowicz
290 2 Tomek Dziemidowicz
h2. Supported databases
291
292 30 Tomek Dziemidowicz
AMPLI-SYNC supports those databases:
293
294
* MySQL
295
* Microsoft SQL Server (2005 and newer)
296
* Oracle
297
* PostgreSQL
298
299 31 Tomek Dziemidowicz
h3. Supported columns data types
300
301
SQLite-sync.com uses own conversion table to match column data types when schema from master database is converted to sqlite database.
302
* blob
303
* longblob
304
* varbinary
305
* binary
306
* image
307
* mediumblob
308
* varbinarymax
309
* byte[]
310
* longtext
311
* varchar
312
* nvarchar
313
* char
314
* varcharmax
315
* enum
316
* mediumtext
317
* text
318
* string
319
* geography
320
* geometry
321
* hierarchyid
322
* nchar
323
* ntext
324
* nvarcharmax
325
* userdefineddatatype
326
* userdefinedtabletype
327
* userdefinedtype
328
* variant
329
* xml
330
* tinytext
331
* set
332
* time
333
* timestamp
334
* year
335
* datetime
336
* uniqueidentifier
337
* datetime2
338
* date
339
* mediumint
340
* bit
341
* tinyint
342
* smallint
343
* bigint
344
* int
345
* boolean
346
* byte
347
* long
348
* int64
349
* serial
350
* int32
351
* smalldatetime
352
* double
353
* float
354
* numeric
355
* decimal
356
* real
357
* money
358
359 32 Tomek Dziemidowicz
h3. Primary Key requirements
360
361
Single and mupltiple columns are supported as primary key.
362
When column is AUTO_INCREMENT/SERIAL, identity pool management is handled by AMPLI_SYNC. It means when you insert a new record onto the device, the PK will be automatically changed for the first value available for device. 
363 30 Tomek Dziemidowicz
364 2 Tomek Dziemidowicz
h2. Samples
Go to top