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67 lines
2.6 KiB
Java
67 lines
2.6 KiB
Java
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/*
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XOWA: the XOWA Offline Wiki Application
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Copyright (C) 2012 gnosygnu@gmail.com
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package gplx.dbs; import gplx.*;
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import gplx.dbs.engines.*;
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import gplx.dbs.qrys.bats.*;
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public class Db_conn_pool { // PURPOSE: cache one connection per connection_string
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private final Ordered_hash hash = Ordered_hash_.New();
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public Db_batch_mgr Batch_mgr() {return batch_mgr;} private final Db_batch_mgr batch_mgr = new Db_batch_mgr();
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public void Del(Db_conn_info url) {hash.Del(url.Db_api());}
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public Db_conn Get_or_new(String s) {return Get_or_new(Db_conn_info_.parse(s));}
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public Db_conn Get_or_new(Db_conn_info url) {
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Db_conn rv = (Db_conn)hash.Get_by(url.Db_api());
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if (rv == null) {
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Db_engine prime = (Db_engine)prime_hash.Get_by(url.Key()); if (prime == null) Err_.new_wo_type("db engine prototype not found", "key", url.Key());
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Db_engine clone = prime.New_clone(url);
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rv = new Db_conn(clone);
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clone.Batch_mgr().Copy(clone.Tid(), batch_mgr);
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hash.Add(url.Db_api(), rv);
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}
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return rv;
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}
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public void Add_existing(Db_conn conn) {
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hash.Add(conn.Conn_info().Db_api(), conn);
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}
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public void Rls_all() {
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int len = hash.Len();
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Db_conn[] rls_ary = new Db_conn[len];
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for (int i = 0; i < len; ++i)
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rls_ary[i] = (Db_conn)hash.Get_at(i);
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for (int i = 0; i < len; ++i)
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rls_ary[i].Rls_conn();
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hash.Clear();
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}
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private final Hash_adp prime_hash = Hash_adp_.New();
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public static final Db_conn_pool Instance = new Db_conn_pool(); Db_conn_pool() {this.Init();}
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public void Primes__add(Db_engine... ary) { // PUBLIC.DRD:
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for (Db_engine itm : ary)
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prime_hash.Add(itm.Tid(), itm);
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}
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private void Init() {
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this.Primes__add
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( gplx.dbs.engines.noops .Noop_engine.Instance
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, gplx.dbs.engines.mems .Mem_engine.Instance
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, gplx.dbs.engines.sqlite .Sqlite_engine.Instance
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, gplx.dbs.engines.mysql .Mysql_engine.Instance
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, gplx.dbs.engines.postgres .Postgres_engine.Instance
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, gplx.dbs.engines.tdbs .TdbEngine.Instance
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);
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}
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}
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