Roll cacheinvalidation to 20150720

third_party/cacheinvalidation/src/java/com/google/ipc/invalidation/ticl/RecurringTask.java

 /*
  * Copyright 2011 Google Inc.
  *
  * Licensed 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
@@ skipping 193 matching lines @@
    *        for scheduling. If {@code isRetry} is true, it determines the new delay to be
    *        {@code timeoutDelayMs} + {@ocde delayGenerator.getNextDelay()} if
    *        {@code delayGenerator} is non-null. If {@code delayGenerator} is null, schedules the
    *        task after a delay of {@code timeoutDelayMs} + smeared value of {@code initialDelayMs}
    * <p>
    * REQUIRES: Must be called from the scheduler thread.
    */
   private void ensureScheduled(boolean isRetry, String debugReason) {
     Preconditions.checkState(scheduler.isRunningOnThread());
     if (isScheduled) {
+      logger.fine("[%s] Not scheduling task that is already scheduled", debugReason);
       return;
     }
     final int delayMs;
 
     if (isRetry) {
       // For a retried task, determine the delay to be timeout + extra delay (depending on whether
       // a delay generator was provided or not).
       if (delayGenerator != null) {
         delayMs = timeoutDelayMs + delayGenerator.getNextDelay();
       } else {
@@ skipping 23 matching lines @@
 
   @Override
   public void toCompactString(TextBuilder builder) {
     builder.append("<RecurringTask: name=").append(name)
         .append(", initialDelayMs=").append(initialDelayMs)
         .append(", timeoutDelayMs=").append(timeoutDelayMs)
         .append(", isScheduled=").append(isScheduled)
         .append(">");
   }
 }