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fill out some more migration facilities

0.6.0-stable
Sean Dague 2008-06-09 19:37:13 +00:00
parent c30e9ff0f1
commit 2e2dde71f2
1 changed files with 51 additions and 20 deletions
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71
OpenSim/Data/Migrations/Migration.cs
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@ -71,29 +71,33 @@ namespace OpenSim.Data.Migrations
private string _type;
private DbConnection _conn;
private string _subtype;
private Assembly _assem;
private static readonly string _migrations_create = "create table migrations(name varchar(100), version int)";
private static readonly string _migrations_init = "insert into migrations values('migrations', 1)";
private static readonly string _migrations_find = "select version from migrations where name='migrations'";
public Migration(DbConnection conn, string type)
public Migration(DbConnection conn, Assembly assem, string type)
{
_type = type;
_conn = conn;
_assem = assem;
}
private void Initialize()
{
// clever, eh, we figure out which migrations version we are
int migration_version = FindVersion("migrations");
if (migration_version > 0)
return;
// If not, create the migration tables
DbCommand cmd = _conn.CreateCommand();
cmd.CommandText = _migrations_find;
// TODO: generic way to get that text
// if ( not found )
cmd.CommandText = _migrations_create;
cmd.ExecuteNonQuery();
cmd.CommandText = _migrations_init;
cmd.ExecuteNonQuery();
UpdateVersion("migrations", 1);
}
public void Update()
@ -102,23 +106,55 @@ namespace OpenSim.Data.Migrations
version = FindVersion(_type);
List<string> migrations = GetMigrationsAfter(version);
DbCommand cmd = _conn.CreateCommand();
foreach (string m in migrations)
{
// TODO: update each
cmd.CommandText = m;
cmd.ExecuteNonQuery();
}
// TODO: find the last revision by number and populate it back
UpdateVersion(_type, MaxVersion());
}
private int FindVersion(string _type)
private int MaxVersion()
{
int max = 0;
string[] names = _assem.GetManifestResourceNames();
List<string> migrations = new List<string>();
Regex r = new Regex(@"^(\d\d\d)_" + _type + @"\.sql");
foreach (string s in names)
{
Match m = r.Match(s);
int MigrationVersion = int.Parse(m.Groups[1].ToString());
if ( MigrationVersion > max )
max = MigrationVersion;
}
return max;
}
private int FindVersion(string type)
{
int version = 0;
DbCommand cmd = _conn.CreateCommand();
cmd.CommandText = "select version from migrations where name='" + _type + "' limit 1";
cmd.CommandText = "select version from migrations where name='" + type + "' limit 1";
using (IDataReader reader = cmd.ExecuteReader())
{
if (reader.Read())
{
version = Convert.ToInt32(reader["version"]);
}
reader.Close();
}
return version;
}
private void UpdateVersion(string type, int version)
{
DbCommand cmd = _conn.CreateCommand();
cmd.CommandText = "update migrations set version=" + version + " where name='" + type + "'";
cmd.ExecuteNonQuery();
}
private List<string> GetAllMigrations()
{
@ -127,8 +163,7 @@ namespace OpenSim.Data.Migrations
private List<string> GetMigrationsAfter(int version)
{
Assembly assem = GetType().Assembly;
string[] names = assem.GetManifestResourceNames();
string[] names = _assem.GetManifestResourceNames();
List<string> migrations = new List<string>();
Regex r = new Regex(@"^(\d\d\d)_" + _type + @"\.sql");
@ -141,7 +176,7 @@ namespace OpenSim.Data.Migrations
Match m = r.Match(s);
m_log.Info("MIGRATION: Match: " + m.Groups[1].ToString());
int MigrationVersion = int.Parse(m.Groups[1].ToString());
using (Stream resource = assem.GetManifestResourceStream(s))
using (Stream resource = _assem.GetManifestResourceStream(s))
{
using (StreamReader resourceReader = new StreamReader(resource))
{
@ -159,9 +194,5 @@ namespace OpenSim.Data.Migrations
return migrations;
}
}
}