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QuestDB is High Performance Time Series Database

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 * Copyright (C) 2014-2016 Appsicle
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 * This program is free software: you can redistribute it and/or  modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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package com.questdb.mp;

import com.questdb.ex.JournalRuntimeException;
import com.questdb.ex.TimeoutException;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class TimeoutBlockingWaitStrategy extends AbstractWaitStrategy {
    private final Lock lock = new ReentrantLock();
    private final Condition condition = lock.newCondition();
    private final long time;
    private final TimeUnit unit;

    public TimeoutBlockingWaitStrategy(long time, TimeUnit unit) {
        this.time = time;
        this.unit = unit;
    }

    @Override
    public boolean acceptSignal() {
        return true;
    }

    @Override
    public void await() {
        lock.lock();
        try {
            if (alerted) {
                throw AlertedException.INSTANCE;
            }
            if (!condition.await(time, unit)) {
                throw TimeoutException.INSTANCE;
            }
        } catch (InterruptedException e) {
            throw new JournalRuntimeException(e);
        } finally {
            lock.unlock();
        }
    }

    @Override
    public void signal() {
        lock.lock();
        try {
            condition.signalAll();
        } finally {
            lock.unlock();
        }

    }
}