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90 lines
3.9 KiB
90 lines
3.9 KiB
/*
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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.diffs.builds; import gplx.*; import gplx.dbs.*; import gplx.dbs.diffs.*;
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import gplx.dbs.metas.*; import gplx.dbs.diffs.itms.*;
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public class Gfdb_diff_wkr__db implements Gfdb_diff_wkr {
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private Dbmeta_fld_itm[] val_flds; private int val_flds_len;
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private Gfdb_diff_tbl tbl; private Db_rdr old_rdr, new_rdr;
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private Gdif_bldr_ctx ctx;
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private Db_conn dif_conn; private Db_stmt stmt;
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private int uid, prog_interval, prog_count;
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private boolean cmd_create;
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public void Init_conn(Gdif_db dif_db, int prog_interval) {this.dif_conn = dif_db.Conn(); this.prog_interval = prog_interval;}
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public void Init_rdrs(Gdif_bldr_ctx ctx, Gfdb_diff_tbl tbl, Db_rdr old_rdr, Db_rdr new_rdr) {
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this.ctx = ctx; this.tbl = tbl; this.old_rdr = old_rdr; this.new_rdr = new_rdr;
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this.val_flds = tbl.Vals; val_flds_len = val_flds.length;
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this.uid = 0; this.prog_count = 0;
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String dif_tbl = tbl.Name; Dbmeta_fld_itm[] dif_flds = Gfdb_diff_wkr__db_.New_dif_flds(tbl.Flds);
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if (!dif_conn.Meta_tbl_exists(dif_tbl)) dif_conn.Meta_tbl_create(Dbmeta_tbl_itm.New(dif_tbl, dif_flds));
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this.stmt = dif_conn.Stmt_insert(dif_tbl, Gfdb_diff_wkr__db_.To_str_ary(dif_flds));
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dif_conn.Txn_bgn("dif_db_tbl_" + dif_tbl);
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cmd_create = true;
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}
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public void Term_tbls() {
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dif_conn.Txn_end();
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}
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public void Handle_old_missing() {Insert(Gdif_db_.Tid__insert, ++uid, new_rdr, tbl.Flds);}
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public void Handle_new_missing() {Insert(Gdif_db_.Tid__delete, ++uid, old_rdr, tbl.Flds);}
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public void Handle_same() {
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if (Gfdb_rdr_utl_.Compare(val_flds, val_flds_len, old_rdr, new_rdr) != CompareAble_.Same)
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Insert(Gdif_db_.Tid__update, ++uid, new_rdr, tbl.Flds);
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}
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private void Insert(byte dif_type, int uid, Db_rdr rdr, Dbmeta_fld_itm[] flds) {
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if (cmd_create) {
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cmd_create = false;
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ctx.Cur_cmd = ctx.Core.New_cmd(ctx, Gdif_cmd_itm.Tid__data);
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ctx.Cur_txn = ctx.Core.New_txn(ctx, ctx.Cur_cmd.Cmd_id, Gdif_txn_itm.Owner_txn__null);
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}
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stmt.Clear();
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stmt.Val_int (Gdif_db_.Fld__dif_txn , ctx.Cur_txn.Txn_id)
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.Val_int (Gdif_db_.Fld__dif_uid , uid)
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.Val_int (Gdif_db_.Fld__dif_type , dif_type)
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.Val_int (Gdif_db_.Fld__dif_db_src , -1)
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.Val_int (Gdif_db_.Fld__dif_db_trg , -1);
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Gfdb_rdr_utl_.Stmt_args(stmt, flds, flds.length, rdr);
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stmt.Exec_insert();
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if ((++prog_count % prog_interval) == 0) dif_conn.Txn_sav();
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}
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}
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class Gfdb_diff_wkr__db_ {
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public static Dbmeta_fld_itm[] New_dif_flds(Dbmeta_fld_itm[] cur_flds) {
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int len = cur_flds.length;
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int sys_flds = 5;
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Dbmeta_fld_itm[] rv = new Dbmeta_fld_itm[len + sys_flds];
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rv[0] = Dbmeta_fld_itm.new_int (Gdif_db_.Fld__dif_txn);
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rv[1] = Dbmeta_fld_itm.new_int (Gdif_db_.Fld__dif_uid);
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rv[2] = Dbmeta_fld_itm.new_byte (Gdif_db_.Fld__dif_type);
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rv[3] = Dbmeta_fld_itm.new_int (Gdif_db_.Fld__dif_db_trg);
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rv[4] = Dbmeta_fld_itm.new_int (Gdif_db_.Fld__dif_db_src);
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for (int i = 0; i < len; ++i) {
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Dbmeta_fld_itm cur_fld = cur_flds[i];
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Dbmeta_fld_itm dif_fld = new Dbmeta_fld_itm(cur_fld.Name(), cur_fld.Type());
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rv[i + sys_flds] = dif_fld;
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}
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return rv;
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}
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public static String[] To_str_ary(Dbmeta_fld_itm[] ary) {
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int len = ary.length;
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String[] rv = new String[len];
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for (int i = 0; i < len; ++i)
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rv[i] = ary[i].Name();
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return rv;
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}
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}
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