git.basschouten.com Git - openhab-addons.git/blob

   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.minecraft.internal.util;
  14
  15 import java.util.concurrent.TimeUnit;
  16
  17 import rx.Observable;
  18 import rx.functions.Func1;
  19
  20 /**
  21  * RX operator subscribing to observable with a delay after it has finished.
  22  *
  23  * @author Mattias Markehed - Initial contribution
  24  */
  25 public class RetryWithDelay implements Func1<Observable<? extends Throwable>, Observable<?>> {
  26
  27     private final int maxRetries;
  28     private final long retryDelayMillis;
  29     private int retryCount;
  30
  31     public RetryWithDelay(final long retryDelay, TimeUnit unit) {
  32         this(-1, TimeUnit.MILLISECONDS.convert(retryDelay, unit));
  33     }
  34
  35     public RetryWithDelay(final int maxRetries, final long retryDelay, TimeUnit unit) {
  36         this(maxRetries, TimeUnit.MILLISECONDS.convert(retryDelay, unit));
  37     }
  38
  39     private RetryWithDelay(final int maxRetries, final long retryDelayMillis) {
  40         this.maxRetries = maxRetries;
  41         this.retryDelayMillis = retryDelayMillis;
  42         this.retryCount = 0;
  43     }
  44
  45     @Override
  46     public Observable<?> call(Observable<? extends Throwable> attempts) {
  47         return attempts.flatMap(new Func1<Throwable, Observable<?>>() {
  48             @Override
  49             public Observable<?> call(Throwable throwable) {
  50                 if (maxRetries < 0 || ++retryCount < maxRetries) {
  51                     return Observable.timer(retryDelayMillis, TimeUnit.MILLISECONDS);
  52                 }
  53
  54                 return Observable.error(throwable);
  55             }
  56         });
  57     }
  58 }