/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ignite.internal.util;

/**
 * Clock timer for tests.
 */
public class GridTestClockTimer implements Runnable {
    /**
     * Constructor.
     */
    public GridTestClockTimer() {
        synchronized (IgniteUtils.mux) {
            assert IgniteUtils.gridCnt == 0 : IgniteUtils.gridCnt;

            IgniteUtils.gridCnt++; // To prevent one more timer thread start from IgniteUtils.onGridStart.
        }
    }

    /**
     * @return {@code True} if need start test time.
     */
    public static boolean startTestTimer() {
        synchronized (IgniteUtils.mux) {
            return IgniteUtils.gridCnt == 0;
        }
    }

    /** {@inheritDoc} */
    @Override public void run() {
        while (true) {
            IgniteUtils.curTimeMillis = System.currentTimeMillis();

            try {
                Thread.sleep(10);
            }
            catch (InterruptedException ignored) {
                break;
            }
        }
    }
}