From 6d39069ae81fb2a47edcb61e82d82cabea5c2a8e Mon Sep 17 00:00:00 2001
From: Marco Ziccardi <marco.ziccard@gmail.com>
Date: Wed, 13 Apr 2016 10:04:30 +0200
Subject: [PATCH] Compute's Operation.isDone() return true if operation does
 not exist

---
 .../com/google/gcloud/compute/Operation.java     | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/gcloud-java-compute/src/main/java/com/google/gcloud/compute/Operation.java b/gcloud-java-compute/src/main/java/com/google/gcloud/compute/Operation.java
index 4270147777a6..2b35dac3fd2b 100644
--- a/gcloud-java-compute/src/main/java/com/google/gcloud/compute/Operation.java
+++ b/gcloud-java-compute/src/main/java/com/google/gcloud/compute/Operation.java
@@ -640,23 +640,21 @@ public boolean exists() throws ComputeException {
 
   /**
    * Checks if this operation has completed its execution, either failing or succeeding. If the
-   * operation does not exist this method returns {@code false}. To correctly wait for operation's
-   * completion, check that the operation exists first using {@link #exists()}:
+   * operation does not exist this method returns {@code true}. You can wait for operation
+   * completion with:
    * <pre> {@code
-   * if (operation.exists()) {
-   *   while(!operation.isDone()) {
-   *     Thread.sleep(1000L);
-   *   }
+   * while(!operation.isDone()) {
+   *   Thread.sleep(1000L);
    * }}</pre>
    *
-   * @return {@code true} if this operation is in {@link Operation.Status#DONE} state, {@code false}
-   *     if the state is not {@link Operation.Status#DONE} or the operation does not exist
+   * @return {@code true} if this operation is in {@link Operation.Status#DONE} state or if it does
+   *     not exist, {@code false} if the state is not {@link Operation.Status#DONE}
    * @throws ComputeException upon failure
    */
   public boolean isDone() throws ComputeException {
     Operation operation =
         compute.get(operationId, Compute.OperationOption.fields(Compute.OperationField.STATUS));
-    return operation != null && operation.status() == Status.DONE;
+    return operation == null || operation.status() == Status.DONE;
   }
 
   /**