LiteSync

"file:/path/to/app.db"

"file:/path/to/app.db?node=secondary&connect=tcp://server.ip:1234"

"file:/home/user/app.db?node=primary&bind=tcp://0.0.0.0:1234"

"file:/home/user/app.db?node=secondary&connect=tcp://server:1234"

"file:/home/user/app.db?node=primary&connect=tcp://address1:port1,tcp://address2:port2"

"file:/home/user/app.db?node=secondary&bind=tcp://0.0.0.0:1234"

"file:/home/user/app.db?node=primary&bind=tcp://0.0.0.0:1234&connect=tcp://address1:port1"

"file:/home/user/app.db?node=secondary&connect=tcp://server:1234"

"file:/home/user/app.db?node=secondary&bind=tcp://0.0.0.0:1234"

"file:db1.db?node=primary&total_primary_nodes=3&bind=tcp://0.0.0.0:1201"

"file:db2.db?node=primary&total_primary_nodes=3&bind=tcp://0.0.0.0:1202& connect=tcp://127.0.0.1:1201"

"file:db3.db?node=primary&total_primary_nodes=3&bind=tcp://0.0.0.0:1203& connect=tcp://127.0.0.1:1201,tcp://127.0.0.1:1202"

"file:db4.db?node=secondary&connect=tcp://127.0.0.1:1201,tcp://127.0.0.1:1202,tcp://127.0.0.1:1203"

PRAGMA sync_status

选择编程语言 -->

static void on_db_update(sqlite3_context *context, int argc, sqlite3_value **argv){ char* changes = sqlite3_value_text(argv[0]); printf("收到更新: %s\n", changes); } sqlite3_create_function(db, "update_notification", 1, SQLITE_UTF8, NULL, &on_db_update, NULL, NULL);

db.define("update_notification", [](std::string changes) { std::cout << "收到更新: " << changes << std::endl; });

def on_db_update(changes): print("收到更新:", changes) con.create_function("update_notification", 1, on_db_update)

// using better-sqlite3: db.on('sync', function(changes) { console.log('收到更新: ' + changes); });

Function.create(conn, "update_notification", new Function() { protected void xFunc(changes) { System.out.println("收到更新: " + changes); } });

// using SQLite.NET: db.OnSync((changes) => { // the db received an update. update the screen with new data UpdateScreen(db); }); // using Microsoft.Data.SQLite: db.CreateFunction("update_notification", (changes) => { // notification received on the worker thread // do not access the db connection here // transfer the notification to the main thread Console.WriteLine("收到更新: " + changes); return 0; });

' Using SQLite.NET: db.OnSync(Function(changes) As Integer ' the db received an update. update the screen with new data UpdateScreen(db) End Function) ' Using Microsoft.Data.SQLite: db.CreateFunction("update_notification", Function(changes) As Integer ' notification received on the worker thread ' do not access the db connection here ' transfer the notification to the main thread Console.WriteLine("收到更新: " & changes) End Function)

function on_db_update($changes) { echo '收到更新: $changes'; } // with sqlite3: $db->createFunction('update_notification', 'on_db_update'); // with pdo_sqlite: $db->sqliteCreateFunction('update_notification', 'on_db_update', 1);

$dbh->sqlite_create_function( 'update_notification', 1, sub { my $changes = shift; # retrieve the argument passed to the function print "收到更新: $changes"; });

db.create_function "update_notification", 1 do |func, changes| puts "收到更新: #{changes}" func.result = null end

db.create(function: "update_notification", argc: 1) { args in let changes = args.first as! String println("收到更新: \(changes)") return nil }

db:create_function('update_notification',1,function(ctx,changes) print('收到更新: ' .. changes) ctx:result_null() end)

func on_db_update(changes string) int64 { print('收到更新: ' + changes) return null } sql.Register("sqlite3_custom", &sqlite.SQLiteDriver{ ConnectHook: func(conn *sqlite.SQLiteConn) error { if err := conn.RegisterFunc("update_notification", on_db_update, true); err != nil { return err } return nil }, }) db, err := sql.Open("sqlite3_custom", "file:data.db?node=...")

选择编程语言 -->

#include <sqlite3.h> char *uri = "file:/path/to/app.db?node=primary&bind=tcp://0.0.0.0:1234"; int main() { sqlite3 *db; sqlite3_open(uri, &db); /* open the database */ while(1) sleep(1); /* keep the app open */ }

#include <sqlite_modern_cpp.h> #include <thread> #include <chrono> #include <iostream> using namespace sqlite; int main() { try { // open the database database db("file:app.db?node=primary&bind=tcp://0.0.0.0:1234"); // keep the app open while(1) { std::this_thread::sleep_for(std::chrono::seconds(1)); } } catch (std::exception& e) { std::cerr << e.what() << std::endl; } }

import litesync as sqlite3 conn = sqlite3.connect('file:/path/to/app.db?node=primary&bind=tcp://0.0.0.0:1234') # keep the app open import time while True: time.sleep(60) # in seconds

const uri = 'file:app.db?node=primary&bind=tcp://0.0.0.0:1234'; const options = { verbose: console.log }; const db = require('better-sqlite3-litesync')(uri, options); // keep the app open setInterval(function(){}, 5000);

import java.sql.Connection; import java.sql.DriverManager; public class Sample { public static void main(String[] args) { String uri = "file:/path/to/app.db?node=primary&bind=tcp://0.0.0.0:1234"; Connection connection = DriverManager.getConnection("jdbc:sqlite:" + uri); // keep the app open while (true) { Thread.sleep(5000); } } }

using SQLite; public class Program { public static void Main() { // open the database var uri = "file:app.db?node=primary&bind=tcp://0.0.0.0:1234"; var db = new SQLiteConnection(uri); // keep the app open while(true) { System.Threading.Thread.Sleep(5000); } } }

Imports SQLite Public Class Program Public Shared Sub Main() ' open the database Dim db As New SQLiteConnection("file:app.db?node=primary&bind=tcp://0.0.0.0:1234") ' keep the app open Do System.Threading.Thread.Sleep(5000) Loop End Sub End Class

Option Explicit Declare Sub Sleep Lib "kernel32.dll" (ByVal dwMilliseconds As Long) Public Sub Main() Dim URI As String Dim Conn As New ADODB.Connection ' Open the connection URI = "file:C:\app\mydb.db?node=primary&bind=tcp://0.0.0.0:1234" Conn.Open "DRIVER=SQLite3 ODBC Driver;Database=" & URI ' Keep the app open Do: Sleep(5000): Loop End Sub

<?php // with sqlite3: $db = new SQLite3("file:/path/to/app.db?node=primary&bind=tcp://0.0.0.0:1234"); // with pdo_sqlite: $pdo = new PDO("sqlite:file:/path/to/app.db?node=primary&bind=tcp://0.0.0.0:1234"); // keep the app open - it should not be used with apache while(1) sleep(5); ?>

use DBI; my $dbh = DBI->connect("dbi:SQLite:uri=file:/path/to/app.db?node=primary&bind=tcp://0.0.0.0:1234"); // keep the app open - it should not be used with apache sleep;

require 'sqlite3' db = SQLite3::Database.new "file:/path/to/app.db?node=primary&bind=tcp://0.0.0.0:1234" # keep the app open loop do sleep(1) end

local sqlite3 = require("lsqlite3") local db = sqlite3.open('file:/path/to/app.db?node=primary&bind=tcp://0.0.0.0:1234') -- keep the app open local lsocket = require("lsocket") while true do lsocket.select(5000) end

package main import ( "database/sql" _ "github.com/litesync/go-sqlite3" "time" ) func main() { db, err := sql.Open("sqlite3", "file:/path/to/app.db?node=primary&bind=tcp://0.0.0.0:1234") // keep the app open for { time.Sleep(1000 * time.Millisecond) } }

选择编程语言 -->

#include <sqlite3.h> char *uri = "file:/path/to/app.db?node=secondary&connect=tcp://myserver.ddns.net:1234"; int main() { sqlite3 *db; /* open the database */ sqlite3_open(&db, uri); /* check if the db is ready */ while(1){ char *json_str = sqlite3_query_value_str(db, "PRAGMA sync_status", NULL); bool db_is_ready = strstr(json_str, "\"db_is_ready\": true") > 0; sqlite3_free(json_str); if (db_is_ready) break; sleep_ms(250); } /* access the database */ start_access(db); } char * sqlite3_query_value_str(sqlite3 *db, char *sql, char **ppErrMsg) { char *ptr = NULL; sqlite3_stmt *stmt; int rc; if (ppErrMsg) *ppErrMsg = NULL; rc = sqlite3_prepare_v2(db, sql, -1, &stmt, NULL); if (rc != SQLITE_OK) { if (ppErrMsg) *ppErrMsg = sqlite3_strdup(sqlite3_errmsg(db)); return NULL; } if (sqlite3_step(stmt) == SQLITE_ROW) { char *text = (char *)sqlite3_column_text(stmt, 0); if (text) { ptr = sqlite3_strdup(text); } } sqlite3_finalize(stmt); return ptr; }

#include <iostream> #include <sqlite_modern_cpp.h> #include <unistd.h> using namespace sqlite; using namespace std; int main() { try { // open the database database db("file:app.db?node=secondary&connect=tcp://myserver.ddns.net:1234"); // wait until the database is ready while(1) { string status; db << "pragma sync_status" >> status; cout << "status : " << status << endl; if (status.find("\"db_is_ready\": true") != string::npos) break; sleep(1); } // now the application can access the database // check examples here: // https://github.com/SqliteModernCpp/sqlite_modern_cpp ... } catch (exception& e) { cout << e.what() << endl; } }

import litesync as sqlite3 import json import time conn = sqlite3.connect('file:/path/to/app.db?node=secondary&connect=tcp://myserver.ddns.net:1234') # check if the db is ready while not conn.is_ready(): time.sleep(0.250) start_access(conn)

const uri = 'file:test.db?node=secondary&connect=tcp://127.0.0.1:1234'; const options = { verbose: console.log }; const db = require('better-sqlite3-litesync')(uri, options); db.on('ready', function() { // the database is ready to be accessed db.exec('CREATE TABLE IF NOT EXISTS users (name, email)'); ... });

import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; import org.json.*; public class Sample { public static void main(String[] args) { String uri = "file:/path/to/app.db?node=secondary&connect=tcp://myserver.ddns.net:1234"; Connection connection = DriverManager.getConnection("jdbc:sqlite:" + uri); Statement statement = connection.createStatement(); // check if the db is ready while (true) { ResultSet rs = statement.executeQuery("PRAGMA sync_status"); rs.next(); JSONObject obj = new JSONObject(rs.getString(1)); if (obj.getBoolean("db_is_ready")) break; Thread.sleep(250); } // now we can access the db start_access(connection); } }

using SQLite; public class Program { public static void Main() { // open the database var uri = "file:app.db?node=secondary&connect=tcp://server:port"; var db = new SQLiteConnection(uri); // wait until the db is ready while (!db.IsReady()) { System.Threading.Thread.Sleep(250); } // now we can use the database db.CreateTable<TodoItem>(CreateFlags.AutoIncPK); ... } }

Imports SQLite Public Class Program Public Shared Sub Main() ' open the database Dim db As New SQLiteConnection("file:app.db?node=secondary&connect=tcp://server:port") ' wait until the db is ready While Not db.IsReady() System.Threading.Thread.Sleep(250) End While ' now we can use the database db.CreateTable(Of TodoItem)(CreateFlags.AutoIncPK) ' ... End Sub End Class

Option Explicit Declare Sub Sleep Lib "kernel32.dll" (ByVal dwMilliseconds As Long) Public Sub Main() Dim Conn As New ADODB.Connection Dim Rst As ADODB.Recordset Dim URI As String URI = "file:C:\app\mydb.db?node=secondary&connect=tcp://myserver.ddns.net:1234" Conn.Open "DRIVER=SQLite3 ODBC Driver;Database=" & URI ' Check if the database is ready Do Set Rst = New ADODB.Recordset Rst.Open "PRAGMA sync_status", Conn, , , adCmdText If InStr(Rst!sync_status, """db_is_ready"": true") > 0 Then Exit Do Sleep 200 Loop ' Now we can access the db StartDbAccess(Conn) End Sub

<?php // with sqlite3: $db = new SQLite3("file:/path/to/app.db?node=secondary&connect=tcp://myserver.ddns.net:1234"); // with pdo_sqlite: $pdo = new PDO("sqlite:file:/path/to/app.db?node=secondary&connect=tcp://myserver.ddns.net:1234"); // check if the db is ready while(1) { $results = $db->query('PRAGMA sync_status'); $row = $results->fetchArray(); $status = json_decode($row[0], true); if ($status['db_is_ready'] == true) break; sleep(0.25); } // now we can access the db start_access($db); ?>

use DBI; use JSON qw( decode_json ); my $dbh = DBI->connect("dbi:SQLite:uri=file:/path/to/app.db?node=secondary&connect=tcp://myserver.ddns.net:1234"); // check if the db is ready - it should not be used with apache while (1) { my ($result) = $dbh->selectrow_array("PRAGMA sync_status"); my $status = decode_json($result); if ($status->{'db_is_ready'}) last; sleep; } // now we can access the db ...

require 'sqlite3' require 'json' db = SQLite3::Database.new "file:/path/to/app.db?node=secondary&connect=tcp://myserver.ddns.net:1234" # check if the db is ready loop do result = db.get_first_value "PRAGMA sync_status" status = JSON.parse(result) break if status["db_is_ready"] == true sleep 0.25 end # now we can access the db start_access(db)

local sqlite3 = require "lsqlite3" local json = require "json" local db = sqlite3.open('file:/path/to/app.db?node=secondary&connect=tcp://myserver.ddns.net:1234') -- check if the db is ready local lsocket = require("lsocket") while true do local result = db:rows("PRAGMA sync_status") local status = json:decode(result[0]) if status["db_is_ready"] == true then break end lsocket.select(250) end -- now we can access the db start_access(db)

package main import ( "database/sql" _ "github.com/litesync/go-sqlite3" "time" ) func main() { db, err := sql.Open("sqlite3", "file:/path/to/app.db?node=secondary&connect=tcp://myserver.ddns.net:1234") // wait until the db is ready for !db.IsReady() { time.Sleep(1000 * time.Millisecond) } // now we can access the db start_access(db) }