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Now /server restore no longer reads the entire file in one go. (Avoids running out of memory for big databases)

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This commit is contained in:
UnknownShadow200 2016-07-29 15:01:00 +10:00
parent f2d6b6c283
commit b15e598250
2 changed files with 57 additions and 39 deletions
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16
Economy/Economy.cs
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@ -31,14 +31,14 @@ namespace MCGalaxy {
const string createTable =
@"CREATE TABLE if not exists Economy (
player VARCHAR(20),
money INT UNSIGNED,
total INT UNSIGNED NOT NULL DEFAULT 0,
purchase VARCHAR(255) NOT NULL DEFAULT '%cNone',
payment VARCHAR(255) NOT NULL DEFAULT '%cNone',
salary VARCHAR(255) NOT NULL DEFAULT '%cNone',
fine VARCHAR(255) NOT NULL DEFAULT '%cNone',
PRIMARY KEY(player)
player VARCHAR(20),
money INT UNSIGNED,
total INT UNSIGNED NOT NULL DEFAULT 0,
purchase VARCHAR(255) NOT NULL DEFAULT '%cNone',
payment VARCHAR(255) NOT NULL DEFAULT '%cNone',
salary VARCHAR(255) NOT NULL DEFAULT '%cNone',
fine VARCHAR(255) NOT NULL DEFAULT '%cNone',
PRIMARY KEY(player)
);";
public struct EcoStats {

80
Server/BackupDB.cs
View File

@ -53,7 +53,7 @@ namespace MCGalaxy {
public static void BackupTable(string tableName, StreamWriter sql) {
//For each table, we iterate through all rows, (and save them)
sql.WriteLine();
sql.WriteLine("-- --------------------------------------------------------");
sql.WriteLine("-- --------------------------------------------------------");
sql.WriteLine("-- Table structure for table `{0}`", tableName);
sql.WriteLine();
List<string[]> schema = WriteTableSchema(tableName, sql);
@ -205,22 +205,25 @@ namespace MCGalaxy {
List<string> tables = GetTables();
foreach (string name in tables)
Database.Execute("DROP TABLE `" + name + "`");
//Make new
string script = new StreamReader(stream).ReadToEnd();
string[] cmds = script.Split(';');
StringBuilder sb = new StringBuilder();
using (BulkTransaction helper = BulkTransaction.Create()) {
foreach (string cmd in cmds) {
string newCmd = cmd.Trim(" \r\n\t".ToCharArray());
int index = newCmd.ToUpper().IndexOf("CREATE TABLE");
if (index > -1) ParseCreate(ref newCmd, index);
// Import data
using (StreamReader reader = new StreamReader(stream))
using (BulkTransaction helper = BulkTransaction.Create())
{
List<string> buffer = new List<string>();
while (!reader.EndOfStream) {
string cmd = NextStatement(reader, buffer);
if (cmd == null || cmd.Length == 0) continue;
int index = cmd.ToUpper().IndexOf("CREATE TABLE");
if (index > -1) ParseCreate(ref cmd, index);
//Run the command in the transaction.
helper.Execute(newCmd.Replace(" unsigned", "").Replace(" UNSIGNED", "") + ";");
helper.Execute(cmd.Replace(" unsigned", "").Replace(" UNSIGNED", ""));
}
helper.Commit();
}
//Not sure if order matters.
//AUTO_INCREMENT is changed to AUTOINCREMENT for MySQL -> SQLite
//AUTOINCREMENT is changed to AUTO_INCREMENT for SQLite -> MySQL
@ -228,33 +231,48 @@ namespace MCGalaxy {
//executeQuery(sb.ToString().Replace(" unsigned", "").Replace(" UNSIGNED", ""));
}
static void ParseCreate(ref string newCmd, int index) {
newCmd = newCmd.Remove(0, index);
static string NextStatement(StreamReader reader, List<string> buffer) {
buffer.Clear();
string line = null;
while ((line = reader.ReadLine()) != null) {
if (line.StartsWith("--")) continue; // comment
line = line.Trim();
if (line.Length == 0) continue; // whitespace
buffer.Add(line);
if (line.EndsWith(";")) break;
}
return buffer.Join("");
}
static void ParseCreate(ref string cmd, int index) {
cmd = cmd.Remove(0, index);
//Do we have a primary key?
try {
if (Server.useMySQL) {
int priIndex = newCmd.ToUpper().IndexOf(" PRIMARY KEY AUTOINCREMENT");
int priIndex = cmd.ToUpper().IndexOf(" PRIMARY KEY AUTOINCREMENT");
int priCount = " PRIMARY KEY AUTOINCREMENT".Length;
int attIdx = newCmd.Substring(0, newCmd.Substring(0, priIndex - 1).LastIndexOfAny("` \n".ToCharArray())).LastIndexOfAny("` \n".ToCharArray()) + 1;
int attIdxEnd = newCmd.IndexOfAny("` \n".ToCharArray(), attIdx) - 1;
string attName = newCmd.Substring(attIdx, attIdxEnd - attIdx + 1).Trim(' ', '\n', '`', '\r');
int attIdx = cmd.Substring(0, cmd.Substring(0, priIndex - 1).LastIndexOfAny("` \n".ToCharArray())).LastIndexOfAny("` \n".ToCharArray()) + 1;
int attIdxEnd = cmd.IndexOfAny("` \n".ToCharArray(), attIdx) - 1;
string attName = cmd.Substring(attIdx, attIdxEnd - attIdx + 1).Trim(' ', '\n', '`', '\r');
//For speed, we just delete this, and add it to the attribute name, then delete the auto_increment clause.
newCmd = newCmd.Remove(priIndex, priCount);
newCmd = newCmd.Insert(newCmd.LastIndexOf(")"), ", PRIMARY KEY (`" + attName + "`)");
newCmd = newCmd.Insert(newCmd.IndexOf(',', priIndex), " AUTO_INCREMENT");
cmd = cmd.Remove(priIndex, priCount);
cmd = cmd.Insert(cmd.LastIndexOf(")"), ", PRIMARY KEY (`" + attName + "`)");
cmd = cmd.Insert(cmd.IndexOf(',', priIndex), " AUTO_INCREMENT");
} else {
int priIndex = newCmd.ToUpper().IndexOf(",\r\nPRIMARY KEY");
int priIndexEnd = newCmd.ToUpper().IndexOf(')', priIndex);
int attIdx = newCmd.IndexOf("(", priIndex) + 1;
int priIndex = cmd.ToUpper().IndexOf(",\r\nPRIMARY KEY");
int priIndexEnd = cmd.ToUpper().IndexOf(')', priIndex);
int attIdx = cmd.IndexOf("(", priIndex) + 1;
int attIdxEnd = priIndexEnd - 1;
string attName = newCmd.Substring(attIdx, attIdxEnd - attIdx + 1);
newCmd = newCmd.Remove(priIndex, priIndexEnd - priIndex + 1);
int start = newCmd.IndexOf(attName) + attName.Length;
int end = newCmd.IndexOf(',');
newCmd = newCmd.Remove(start, end - start);
newCmd = newCmd.Insert(newCmd.IndexOf(attName) + attName.Length, " INTEGER PRIMARY KEY AUTOINCREMENT");
newCmd = newCmd.Replace(" auto_increment", "").Replace(" AUTO_INCREMENT", "").Replace("True", "1").Replace("False", "0");
string attName = cmd.Substring(attIdx, attIdxEnd - attIdx + 1);
cmd = cmd.Remove(priIndex, priIndexEnd - priIndex + 1);
int start = cmd.IndexOf(attName) + attName.Length;
int end = cmd.IndexOf(',');
cmd = cmd.Remove(start, end - start);
cmd = cmd.Insert(cmd.IndexOf(attName) + attName.Length, " INTEGER PRIMARY KEY AUTOINCREMENT");
cmd = cmd.Replace(" auto_increment", "").Replace(" AUTO_INCREMENT", "").Replace("True", "1").Replace("False", "0");
}
}
catch (ArgumentOutOfRangeException) { } // If we don't, just ignore it.