001/*
002 * jPOS Project [http://jpos.org]
003 * Copyright (C) 2000-2026 jPOS Software SRL
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Affero General Public License as
007 * published by the Free Software Foundation, either version 3 of the
008 * License, or (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Affero General Public License for more details.
014 *
015 * You should have received a copy of the GNU Affero General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018
019package org.jpos.transaction.participant;
020
021import java.io.Serializable;
022import org.jpos.core.Configurable;
023import org.jpos.core.Configuration;
024import org.jpos.transaction.Context;
025import org.jpos.transaction.GroupSelector;
026import static org.jpos.transaction.ContextConstants.TXNNAME;
027
028/**
029 * {@link GroupSelector} that picks the next participant group based on the
030 * transaction name stored in the context (default key {@link
031 * org.jpos.transaction.ContextConstants#TXNNAME}).
032 */
033@SuppressWarnings("unused")
034public class Switch implements Configurable, GroupSelector {
035    /** Creates the selector; configuration is supplied via {@link #setConfiguration(Configuration)}. */
036    public Switch() {}
037    private Configuration cfg;
038    private String txnNameEntry;
039    public String select (long id, Serializable ser) {
040        Context ctx = (Context) ser;
041        String type   = ctx.getString (txnNameEntry);
042        String groups = null;
043        if (type != null)
044            groups = cfg.get (type, null);
045        if (groups == null)
046            groups = cfg.get ("unknown", "");
047        ctx.log ("SWITCH " + type + " (" + groups + ")");
048
049        return groups;
050    }
051    public int prepare (long id, Serializable o) {
052        return PREPARED | READONLY | NO_JOIN;
053    }
054    public void setConfiguration (Configuration cfg) {
055        this.cfg = cfg;
056        txnNameEntry = cfg.get("txnname", TXNNAME.toString());
057    }
058}