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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.tesla.internal.throttler;
  14
  15 import java.util.HashMap;
  16 import java.util.Map;
  17 import java.util.concurrent.Executors;
  18 import java.util.concurrent.Future;
  19 import java.util.concurrent.ScheduledExecutorService;
  20 import java.util.concurrent.TimeUnit;
  21
  22 /**
  23  * The {@link ScheduledChannelThrottler} implements a throttler that maintains a
  24  * single execution rates, and does not maintain order of calls (thus has to
  25  * start from back rather than try to insert things in middle)
  26  *
  27  * @author Karel Goderis - Initial contribution
  28  */
  29 public final class ScheduledChannelThrottler extends AbstractChannelThrottler {
  30
  31     public ScheduledChannelThrottler(Rate totalRate) {
  32         this(totalRate, Executors.newSingleThreadScheduledExecutor(), new HashMap<>(), TimeProvider.SYSTEM_PROVIDER);
  33     }
  34
  35     public ScheduledChannelThrottler(Rate totalRate, Map<Object, Rate> channels) {
  36         this(totalRate, Executors.newSingleThreadScheduledExecutor(), channels, TimeProvider.SYSTEM_PROVIDER);
  37     }
  38
  39     public ScheduledChannelThrottler(Rate totalRate, ScheduledExecutorService scheduler, Map<Object, Rate> channels,
  40             TimeProvider timeProvider) {
  41         super(totalRate, scheduler, channels, timeProvider);
  42     }
  43
  44     public void submitSync(Object channelKey, Runnable task) throws InterruptedException {
  45         Thread.sleep(getThrottleDelay(channelKey));
  46         task.run();
  47     }
  48
  49     public void submitSync(Runnable task) throws InterruptedException {
  50         long delay = callTime(null) - timeProvider.getCurrentTimeInMillis();
  51         Thread.sleep(getThrottleDelay(delay));
  52         task.run();
  53     }
  54
  55     @Override
  56     public Future<?> submit(Runnable task) {
  57         long delay = callTime(null) - timeProvider.getCurrentTimeInMillis();
  58         return scheduler.schedule(task, delay < 0 ? 0 : delay, TimeUnit.MILLISECONDS);
  59     }
  60
  61     @Override
  62     public Future<?> submit(Object channelKey, Runnable task) {
  63         return scheduler.schedule(task, getThrottleDelay(channelKey), TimeUnit.MILLISECONDS);
  64     }
  65 }