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51 lines
2.1 KiB
Java
51 lines
2.1 KiB
Java
/*
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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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public class PoolIds {
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public int FetchNext(Db_provider provider, String url) {
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Db_qry_select cmd = Db_qry_.select_().From_(Tbl_Name).Where_(Db_crt_.eq_(Fld_id_path, url));
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int rv = 0;//boolean isNew = true;
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DataRdr rdr = DataRdr_.Null;
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try {
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rdr = cmd.Exec_qry_as_rdr(provider);
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if (rdr.MoveNextPeer()) {
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rv = rdr.ReadInt(Fld_id_next_id);
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}
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}
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finally {rdr.Rls();}
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return rv;
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}
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public int FetchNextAndCommit(String dbInfo, String url) {
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Db_provider provider = Db_provider_pool._.Get_or_new(dbInfo);
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int rv = PoolIds._.FetchNext(provider, url);
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PoolIds._.Commit(provider, url, rv + 1);
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return rv;
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}
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public void Commit(Db_provider provider, String url, int val) {
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int rv = provider.Exec_qry(Db_qry_.update_(Tbl_Name, Db_crt_.eq_(Fld_id_path, url)).Arg_(Fld_id_path, url).Arg_(Fld_id_next_id, val));
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if (rv == 0) {
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rv = provider.Exec_qry(Db_qry_.insert_(Tbl_Name).Arg_(Fld_id_path, url).Arg_(Fld_id_next_id, val));
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}
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if (rv != 1) throw Err_.new_("failed to update nextId").Add("provider", provider.Conn_info().Str_raw()).Add("url", url).Add("nextId", val);
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}
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public static final String Tbl_Name = "pool_ids";
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@gplx.Internal protected static final String Fld_id_path = "id_path";
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@gplx.Internal protected static final String Fld_id_next_id = "id_next_id";
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public static final PoolIds _ = new PoolIds(); PoolIds() {}
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}
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