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;
022
023import org.jpos.core.Configurable;
024import org.jpos.core.Configuration;
025import org.jpos.transaction.Context;
026import org.jpos.transaction.TransactionParticipant;
027import java.util.concurrent.locks.LockSupport;
028
029/**
030 * Diagnostic transaction participant that parks the current thread for a
031 * configurable {@code timeout} during prepare.
032 */
033public class Pause implements TransactionParticipant, Configurable {
034    /** Default constructor; no instance state to initialise. */
035    public Pause() {}
036    private long timeout = 0L;
037    public int prepare(long id, Serializable context) {
038        Context ctx =  (Context) context;
039        if (timeout > 0) {
040            Thread.ofVirtual().start(() -> {
041                LockSupport.parkNanos(timeout * 1_000_000L);
042                ctx.resume(PREPARED | NO_JOIN | READONLY);
043            });
044        }
045        return PAUSE | NO_JOIN | READONLY;
046    }
047
048    public void setConfiguration(Configuration cfg) {
049        timeout = cfg.getLong ("timeout");
050    }
051}