Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2003-2013 eXo Platform SAS.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

import java.util.concurrent.atomic.AtomicLong;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static final String DEFAULT_PATTERN = "Social-Thread ##counter# - #name#";
    private static final Pattern INVALID_PATTERN = Pattern.compile(".*#\\w+#.*");
    private static AtomicLong threadCounter = new AtomicLong();

    /**
     * Creates a new thread name with the given pattern
     * <p/>
     * @param pattern the pattern
     * @param name    the name
     * @return the thread name, which is unique
     */
    public static String resolveThreadName(String pattern, String name) {
        if (pattern == null) {
            pattern = DEFAULT_PATTERN;
        }

        // we support #longName# and #name# as name placeholders
        String longName = name;
        String shortName = name;
        // must quote the names to have it work as literal replacement
        shortName = Matcher.quoteReplacement(shortName);
        longName = Matcher.quoteReplacement(longName);

        // replace tokens
        String answer = pattern.replaceFirst("#counter#", "" + nextThreadCounter());
        answer = answer.replaceFirst("#longName#", longName);
        answer = answer.replaceFirst("#name#", shortName);

        // are there any #word# combos left, if so they should be considered invalid tokens
        if (INVALID_PATTERN.matcher(answer).matches()) {
            throw new IllegalArgumentException("Pattern is invalid: " + pattern);
        }

        return answer;
    }

    private static long nextThreadCounter() {
        return threadCounter.getAndIncrement();
    }
}