opendaylight/config/netty-timer-config/src/main/java/org/opendaylight/controller/config/yang/netty/timer/HashedWheelTimerCloseable.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.config.yang.netty.timer;
   9
  10 import io.netty.util.HashedWheelTimer;
  11 import io.netty.util.Timeout;
  12 import io.netty.util.Timer;
  13 import io.netty.util.TimerTask;
  14 import java.util.Set;
  15 import java.util.concurrent.ThreadFactory;
  16 import java.util.concurrent.TimeUnit;
  17 import javax.annotation.Nullable;
  18
  19 public final class HashedWheelTimerCloseable implements AutoCloseable, Timer {
  20
  21     private final Timer timer;
  22
  23     private HashedWheelTimerCloseable(Timer timer) {
  24         this.timer = timer;
  25     }
  26
  27     @Override
  28     public void close() throws Exception {
  29         stop();
  30     }
  31
  32     @Override
  33     public Timeout newTimeout(TimerTask task, long delay, TimeUnit unit) {
  34         return this.timer.newTimeout(task, delay, unit);
  35     }
  36
  37     @Override
  38     public Set<Timeout> stop() {
  39         return this.timer.stop();
  40     }
  41
  42     public static HashedWheelTimerCloseable newInstance(@Nullable ThreadFactory threadFactory,
  43             @Nullable Long duration, @Nullable Integer ticksPerWheel) {
  44         TimeUnit unit = TimeUnit.MILLISECONDS;
  45         if(!nullOrNonZero(duration) && threadFactory == null && nullOrNonZero(ticksPerWheel)) {
  46             return new HashedWheelTimerCloseable(new HashedWheelTimer(duration, unit));
  47         }
  48
  49         if(!nullOrNonZero(duration) && threadFactory == null && !nullOrNonZero(ticksPerWheel)) {
  50             return new HashedWheelTimerCloseable(new HashedWheelTimer(duration, unit, ticksPerWheel));
  51         }
  52
  53         if(nullOrNonZero(duration) && threadFactory != null && nullOrNonZero(ticksPerWheel)) {
  54             return new HashedWheelTimerCloseable(new HashedWheelTimer(threadFactory));
  55         }
  56
  57         if(!nullOrNonZero(duration) && threadFactory != null && nullOrNonZero(ticksPerWheel)) {
  58             return new HashedWheelTimerCloseable(
  59                     new HashedWheelTimer(threadFactory, duration, unit));
  60         }
  61
  62         if(!nullOrNonZero(duration) && threadFactory != null && !nullOrNonZero(ticksPerWheel)) {
  63             return new HashedWheelTimerCloseable(
  64                     new HashedWheelTimer(threadFactory, duration, unit, ticksPerWheel));
  65         }
  66
  67         return new HashedWheelTimerCloseable(new HashedWheelTimer());
  68     }
  69
  70     private static boolean nullOrNonZero(Number n) {
  71         return n == null || n.longValue() <= 0;
  72     }
  73 }