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Java client for the NSQ realtime distributed messaging platform

There is a newer version: 1.4.8

package com.sproutsocial.nsq;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.ScheduledFuture;

class BasePubSub {

    protected Config config = new Config();
    protected volatile boolean isStopping = false;
    protected final Client client;
    private final List tasks = Collections.synchronizedList(new ArrayList());

    protected BasePubSub(Client client) {
        this.client = client;
    }

    public final Client getClient() {
        return client;
    }

    public synchronized Config getConfig() {
        return config;
    }

    public synchronized void setConfig(Config config) {
        this.config = config;
    }

    protected void scheduleAtFixedRate(Runnable runnable, int initialDelay, int period, boolean jitter) {
        if (!isStopping) {
            tasks.add(client.scheduleAtFixedRate(runnable, initialDelay, period, jitter));
        }
    }

    public void stop() {
        isStopping = true;
        cancelTasks();
    }

    protected void cancelTasks() {
        synchronized (tasks) {
            for (ScheduledFuture task : tasks) {
                task.cancel(false);
            }
            tasks.clear();
        }
    }

}