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.q2.cli;
020
021import org.jpos.q2.CLICommand;
022import org.jpos.q2.CLIContext;
023import org.jpos.transaction.TransactionManager;
024import org.jpos.transaction.TransactionStatusEvent;
025import org.jpos.transaction.TransactionStatusListener;
026import org.jpos.util.NameRegistrar;
027
028import java.io.PrintStream;
029import java.util.Iterator;
030import java.util.Map;
031
032/**
033 * CLI command that subscribes to one or more named transaction managers and
034 * mirrors their {@link TransactionStatusListener} events to the terminal until
035 * the user presses Enter.
036 */
037@SuppressWarnings("unused")
038public class TMMON implements CLICommand, TransactionStatusListener {
039    /** Default constructor; no instance state to initialise. */
040    public TMMON() {}
041    PrintStream p;
042    CLIContext cli;
043    boolean ansi;
044
045    public void exec(CLIContext cli, String[] args) throws Exception {
046        this.p = new PrintStream(cli.getReader().getTerminal().output());
047        this.cli = cli;
048        this.ansi = false; // cli.getReader().getTerminal()
049        if (args.length == 1) {
050            usage(cli);
051            return;
052        }
053        for (int i = 1; i < args.length; i++) {
054            try {
055                Object obj = NameRegistrar.get(args[i]);
056                if (obj instanceof TransactionManager) {
057                    ((TransactionManager) obj).addListener(this);
058                } else {
059                    cli.println("Object '" + args[i]
060                      + "' is not an instance of TransactionManager (" + obj.toString() + ")");
061                }
062            } catch (NameRegistrar.NotFoundException e) {
063                cli.println("TransactionManager '" + args[i] + "' not found -- ignored.");
064            }
065        }
066
067        cli.getReader().readLine();
068
069        for (int i = 1; i < args.length; i++) {
070            try {
071                Object obj = NameRegistrar.get(args[i]);
072                if (obj instanceof TransactionManager) {
073                    ((TransactionManager) obj).removeListener(this);
074                }
075            } catch (NameRegistrar.NotFoundException ignored) {
076                // NOPMD ok to happen
077            }
078        }
079    }
080
081    /**
082     * Prints command usage and lists the registered transaction managers.
083     *
084     * @param cli the CLI context to write to
085     */
086    public void usage(CLIContext cli) {
087        cli.println("Usage: tmmon [tm-name] [tm-name] ...");
088        showTMs(cli);
089    }
090
091    private void showTMs(CLIContext cli) {
092        NameRegistrar nr = NameRegistrar.getInstance();
093        int maxw = 0;
094        Iterator iter = NameRegistrar.getAsMap().entrySet().iterator();
095        StringBuilder sb = new StringBuilder("available transaction managers:");
096        while (iter.hasNext()) {
097            Map.Entry entry = (Map.Entry) iter.next();
098            String key = (String) entry.getKey();
099            if (entry.getValue() instanceof TransactionManager) {
100                sb.append(' ');
101                sb.append(key);
102            }
103        }
104        cli.println(sb.toString());
105    }
106
107    public void update(TransactionStatusEvent e) {
108        cli.println(e.toString());
109    }
110}
111