533 lines
20 KiB
C#
533 lines
20 KiB
C#
/*
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* Copyright (c) Contributors, http://opensimulator.org/
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* See CONTRIBUTORS.TXT for a full list of copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the OpenSimulator Project nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Reflection;
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using log4net;
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using OpenMetaverse;
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using OpenSim.Framework;
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using OpenSim.Region.Framework.Interfaces;
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using System.Text;
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using Npgsql;
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namespace OpenSim.Data.PGSQL
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{
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public class PGSQLGenericTableHandler<T> : PGSqlFramework where T : class, new()
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{
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private static readonly ILog m_log =
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LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
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protected string m_ConnectionString;
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protected PGSQLManager m_database; //used for parameter type translation
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protected Dictionary<string, FieldInfo> m_Fields =
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new Dictionary<string, FieldInfo>();
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protected Dictionary<string, string> m_FieldTypes = new Dictionary<string, string>();
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protected List<string> m_ColumnNames = null;
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protected string m_Realm;
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protected FieldInfo m_DataField = null;
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protected virtual Assembly Assembly
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{
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get { return GetType().Assembly; }
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}
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public PGSQLGenericTableHandler(string connectionString,
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string realm, string storeName)
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: base(connectionString)
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{
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m_Realm = realm;
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m_ConnectionString = connectionString;
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if (storeName != String.Empty)
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{
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using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
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{
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conn.Open();
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Migration m = new Migration(conn, GetType().Assembly, storeName);
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m.Update();
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}
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}
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m_database = new PGSQLManager(m_ConnectionString);
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Type t = typeof(T);
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FieldInfo[] fields = t.GetFields(BindingFlags.Public |
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BindingFlags.Instance |
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BindingFlags.DeclaredOnly);
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LoadFieldTypes();
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if (fields.Length == 0)
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return;
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foreach (FieldInfo f in fields)
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{
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if (f.Name != "Data")
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m_Fields[f.Name] = f;
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else
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m_DataField = f;
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}
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}
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private void LoadFieldTypes()
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{
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m_FieldTypes = new Dictionary<string, string>();
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string query = string.Format(@"select column_name,data_type
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from INFORMATION_SCHEMA.COLUMNS
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where table_name = lower('{0}');
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", m_Realm);
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using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
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using (NpgsqlCommand cmd = new NpgsqlCommand(query, conn))
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{
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conn.Open();
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using (NpgsqlDataReader rdr = cmd.ExecuteReader())
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{
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while (rdr.Read())
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{
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// query produces 0 to many rows of single column, so always add the first item in each row
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m_FieldTypes.Add((string)rdr[0], (string)rdr[1]);
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}
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}
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}
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}
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private void CheckColumnNames(NpgsqlDataReader reader)
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{
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if (m_ColumnNames != null)
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return;
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m_ColumnNames = new List<string>();
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DataTable schemaTable = reader.GetSchemaTable();
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foreach (DataRow row in schemaTable.Rows)
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{
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if (row["ColumnName"] != null &&
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(!m_Fields.ContainsKey(row["ColumnName"].ToString())))
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m_ColumnNames.Add(row["ColumnName"].ToString());
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}
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}
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// TODO GET CONSTRAINTS FROM POSTGRESQL
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private List<string> GetConstraints()
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{
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List<string> constraints = new List<string>();
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string query = string.Format(@"select
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a.attname as column_name
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from
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pg_class t,
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pg_class i,
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pg_index ix,
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pg_attribute a
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where
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t.oid = ix.indrelid
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and i.oid = ix.indexrelid
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and a.attrelid = t.oid
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and a.attnum = ANY(ix.indkey)
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and t.relkind = 'r'
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and ix.indisunique = true
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and t.relname = lower('{0}')
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;", m_Realm);
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using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
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using (NpgsqlCommand cmd = new NpgsqlCommand(query, conn))
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{
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conn.Open();
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using (NpgsqlDataReader rdr = cmd.ExecuteReader())
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{
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while (rdr.Read())
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{
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// query produces 0 to many rows of single column, so always add the first item in each row
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constraints.Add((string)rdr[0]);
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}
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}
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return constraints;
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}
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}
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public virtual T[] Get(string field, string key)
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{
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return Get(new string[] { field }, new string[] { key });
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}
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public virtual T[] Get(string[] fields, string[] keys)
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{
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if (fields.Length != keys.Length)
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return new T[0];
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List<string> terms = new List<string>();
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using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
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using (NpgsqlCommand cmd = new NpgsqlCommand())
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{
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for (int i = 0; i < fields.Length; i++)
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{
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if ( m_FieldTypes.ContainsKey(fields[i]) )
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cmd.Parameters.Add(m_database.CreateParameter(fields[i], keys[i], m_FieldTypes[fields[i]]));
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else
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cmd.Parameters.Add(m_database.CreateParameter(fields[i], keys[i]));
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terms.Add(" \"" + fields[i] + "\" = :" + fields[i]);
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}
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string where = String.Join(" AND ", terms.ToArray());
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string query = String.Format("SELECT * FROM {0} WHERE {1}",
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m_Realm, where);
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cmd.Connection = conn;
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cmd.CommandText = query;
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conn.Open();
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return DoQuery(cmd);
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}
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}
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protected T[] DoQuery(NpgsqlCommand cmd)
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{
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List<T> result = new List<T>();
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if (cmd.Connection == null)
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{
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cmd.Connection = new NpgsqlConnection(m_connectionString);
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}
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if (cmd.Connection.State == ConnectionState.Closed)
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{
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cmd.Connection.Open();
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}
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using (NpgsqlDataReader reader = cmd.ExecuteReader())
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{
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if (reader == null)
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return new T[0];
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CheckColumnNames(reader);
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while (reader.Read())
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{
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T row = new T();
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foreach (string name in m_Fields.Keys)
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{
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if (m_Fields[name].GetValue(row) is bool)
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{
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int v = Convert.ToInt32(reader[name]);
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m_Fields[name].SetValue(row, v != 0 ? true : false);
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}
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else if (m_Fields[name].GetValue(row) is UUID)
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{
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UUID uuid = UUID.Zero;
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UUID.TryParse(reader[name].ToString(), out uuid);
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m_Fields[name].SetValue(row, uuid);
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}
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else if (m_Fields[name].GetValue(row) is int)
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{
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int v = Convert.ToInt32(reader[name]);
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m_Fields[name].SetValue(row, v);
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}
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else
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{
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m_Fields[name].SetValue(row, reader[name]);
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}
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}
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if (m_DataField != null)
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{
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Dictionary<string, string> data =
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new Dictionary<string, string>();
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foreach (string col in m_ColumnNames)
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{
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data[col] = reader[col].ToString();
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if (data[col] == null)
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data[col] = String.Empty;
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}
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m_DataField.SetValue(row, data);
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}
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result.Add(row);
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}
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return result.ToArray();
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}
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}
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public virtual T[] Get(string where)
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{
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using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
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using (NpgsqlCommand cmd = new NpgsqlCommand())
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{
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string query = String.Format("SELECT * FROM {0} WHERE {1}",
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m_Realm, where);
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cmd.Connection = conn;
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cmd.CommandText = query;
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//m_log.WarnFormat("[PGSQLGenericTable]: SELECT {0} WHERE {1}", m_Realm, where);
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conn.Open();
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return DoQuery(cmd);
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}
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}
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public virtual T[] Get(string where, NpgsqlParameter parameter)
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{
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using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
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using (NpgsqlCommand cmd = new NpgsqlCommand())
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{
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string query = String.Format("SELECT * FROM {0} WHERE {1}",
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m_Realm, where);
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cmd.Connection = conn;
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cmd.CommandText = query;
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//m_log.WarnFormat("[PGSQLGenericTable]: SELECT {0} WHERE {1}", m_Realm, where);
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cmd.Parameters.Add(parameter);
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conn.Open();
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return DoQuery(cmd);
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}
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}
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public virtual bool Store(T row)
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{
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List<string> constraintFields = GetConstraints();
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List<KeyValuePair<string, string>> constraints = new List<KeyValuePair<string, string>>();
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using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
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using (NpgsqlCommand cmd = new NpgsqlCommand())
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{
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StringBuilder query = new StringBuilder();
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List<String> names = new List<String>();
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List<String> values = new List<String>();
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foreach (FieldInfo fi in m_Fields.Values)
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{
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names.Add(fi.Name);
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values.Add(":" + fi.Name);
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// Temporarily return more information about what field is unexpectedly null for
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// http://opensimulator.org/mantis/view.php?id=5403. This might be due to a bug in the
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// InventoryTransferModule or we may be required to substitute a DBNull here.
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if (fi.GetValue(row) == null)
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throw new NullReferenceException(
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string.Format(
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"[PGSQL GENERIC TABLE HANDLER]: Trying to store field {0} for {1} which is unexpectedly null",
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fi.Name, row));
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if (constraintFields.Count > 0 && constraintFields.Contains(fi.Name))
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{
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constraints.Add(new KeyValuePair<string, string>(fi.Name, fi.GetValue(row).ToString() ));
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}
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if (m_FieldTypes.ContainsKey(fi.Name))
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cmd.Parameters.Add(m_database.CreateParameter(fi.Name, fi.GetValue(row), m_FieldTypes[fi.Name]));
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else
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cmd.Parameters.Add(m_database.CreateParameter(fi.Name, fi.GetValue(row)));
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}
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if (m_DataField != null)
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{
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Dictionary<string, string> data =
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(Dictionary<string, string>)m_DataField.GetValue(row);
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foreach (KeyValuePair<string, string> kvp in data)
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{
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if (constraintFields.Count > 0 && constraintFields.Contains(kvp.Key))
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{
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constraints.Add(new KeyValuePair<string, string>(kvp.Key, kvp.Key));
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}
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names.Add(kvp.Key);
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values.Add(":" + kvp.Key);
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if (m_FieldTypes.ContainsKey(kvp.Key))
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cmd.Parameters.Add(m_database.CreateParameter("" + kvp.Key, kvp.Value, m_FieldTypes[kvp.Key]));
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else
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cmd.Parameters.Add(m_database.CreateParameter("" + kvp.Key, kvp.Value));
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}
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}
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query.AppendFormat("UPDATE {0} SET ", m_Realm);
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int i = 0;
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for (i = 0; i < names.Count - 1; i++)
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{
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query.AppendFormat("\"{0}\" = {1}, ", names[i], values[i]);
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}
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query.AppendFormat("\"{0}\" = {1} ", names[i], values[i]);
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if (constraints.Count > 0)
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{
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List<string> terms = new List<string>();
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for (int j = 0; j < constraints.Count; j++)
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{
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terms.Add(String.Format(" \"{0}\" = :{0}", constraints[j].Key));
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}
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string where = String.Join(" AND ", terms.ToArray());
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query.AppendFormat(" WHERE {0} ", where);
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}
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cmd.Connection = conn;
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cmd.CommandText = query.ToString();
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conn.Open();
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if (cmd.ExecuteNonQuery() > 0)
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{
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//m_log.WarnFormat("[PGSQLGenericTable]: Updating {0}", m_Realm);
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return true;
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}
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else
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{
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// assume record has not yet been inserted
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query = new StringBuilder();
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query.AppendFormat("INSERT INTO {0} (\"", m_Realm);
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query.Append(String.Join("\",\"", names.ToArray()));
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query.Append("\") values (" + String.Join(",", values.ToArray()) + ")");
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cmd.Connection = conn;
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cmd.CommandText = query.ToString();
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// m_log.WarnFormat("[PGSQLGenericTable]: Inserting into {0} sql {1}", m_Realm, cmd.CommandText);
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if (conn.State != ConnectionState.Open)
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conn.Open();
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if (cmd.ExecuteNonQuery() > 0)
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return true;
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}
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return false;
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}
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}
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public virtual bool Delete(string field, string key)
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{
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return Delete(new string[] { field }, new string[] { key });
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}
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public virtual bool Delete(string[] fields, string[] keys)
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{
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if (fields.Length != keys.Length)
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return false;
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List<string> terms = new List<string>();
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using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
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using (NpgsqlCommand cmd = new NpgsqlCommand())
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{
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for (int i = 0; i < fields.Length; i++)
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{
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if (m_FieldTypes.ContainsKey(fields[i]))
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cmd.Parameters.Add(m_database.CreateParameter(fields[i], keys[i], m_FieldTypes[fields[i]]));
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else
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cmd.Parameters.Add(m_database.CreateParameter(fields[i], keys[i]));
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terms.Add(" \"" + fields[i] + "\" = :" + fields[i]);
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}
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string where = String.Join(" AND ", terms.ToArray());
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string query = String.Format("DELETE FROM {0} WHERE {1}", m_Realm, where);
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cmd.Connection = conn;
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cmd.CommandText = query;
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conn.Open();
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if (cmd.ExecuteNonQuery() > 0)
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{
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//m_log.Warn("[PGSQLGenericTable]: " + deleteCommand);
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return true;
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}
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return false;
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}
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}
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public long GetCount(string field, string key)
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{
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return GetCount(new string[] { field }, new string[] { key });
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}
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public long GetCount(string[] fields, string[] keys)
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{
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if (fields.Length != keys.Length)
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return 0;
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List<string> terms = new List<string>();
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using (NpgsqlCommand cmd = new NpgsqlCommand())
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{
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for (int i = 0; i < fields.Length; i++)
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{
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cmd.Parameters.AddWithValue(fields[i], keys[i]);
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terms.Add("\"" + fields[i] + "\" = :" + fields[i]);
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}
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string where = String.Join(" and ", terms.ToArray());
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string query = String.Format("select count(*) from {0} where {1}",
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m_Realm, where);
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cmd.CommandText = query;
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Object result = DoQueryScalar(cmd);
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return Convert.ToInt64(result);
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}
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}
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public long GetCount(string where)
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{
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using (NpgsqlCommand cmd = new NpgsqlCommand())
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{
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string query = String.Format("select count(*) from {0} where {1}",
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m_Realm, where);
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cmd.CommandText = query;
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object result = DoQueryScalar(cmd);
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return Convert.ToInt64(result);
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}
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}
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public object DoQueryScalar(NpgsqlCommand cmd)
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{
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using (NpgsqlConnection dbcon = new NpgsqlConnection(m_ConnectionString))
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{
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dbcon.Open();
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cmd.Connection = dbcon;
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return cmd.ExecuteScalar();
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}
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}
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}
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}
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