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-rw-r--r--core/java/android/service/resumeonreboot/ResumeOnRebootService.java14
1 files changed, 9 insertions, 5 deletions
diff --git a/core/java/android/service/resumeonreboot/ResumeOnRebootService.java b/core/java/android/service/resumeonreboot/ResumeOnRebootService.java
index 4ebaa96f4be2..ad49ffd57dc2 100644
--- a/core/java/android/service/resumeonreboot/ResumeOnRebootService.java
+++ b/core/java/android/service/resumeonreboot/ResumeOnRebootService.java
@@ -87,7 +87,9 @@ public abstract class ResumeOnRebootService extends Service {
* Implementation for wrapping the opaque blob used for resume-on-reboot prior to
* reboot. The service should not assume any structure of the blob to be wrapped. The
* implementation should wrap the opaque blob in a reasonable time or throw {@link IOException}
- * if it's unable to complete the action.
+ * if it's unable to complete the action due to retry-able errors (e.g network errors)
+ * and {@link IllegalArgumentException} if {@code wrapBlob} fails due to fatal errors
+ * (e.g corrupted blob).
*
* @param blob The opaque blob with size on the order of 100 bytes.
* @param lifeTimeInMillis The life time of the blob. This must be strictly enforced by the
@@ -95,7 +97,8 @@ public abstract class ResumeOnRebootService extends Service {
* this function after expiration should
* fail.
* @return Wrapped blob to be persisted across reboot with size on the order of 100 bytes.
- * @throws IOException if the implementation is unable to wrap the blob successfully.
+ * @throws IOException if the implementation is unable to wrap the blob successfully due to
+ * retry-able errors.
*/
@NonNull
public abstract byte[] onWrap(@NonNull byte[] blob, @DurationMillisLong long lifeTimeInMillis)
@@ -106,12 +109,13 @@ public abstract class ResumeOnRebootService extends Service {
* operation would happen after reboot during direct boot mode (i.e before device is unlocked
* for the first time). The implementation should unwrap the wrapped blob in a reasonable time
* and returns the result or throw {@link IOException} if it's unable to complete the action
- * and {@link IllegalArgumentException} if {@code unwrapBlob} fails because the wrappedBlob is
- * stale.
+ * due to retry-able errors (e.g network error) and {@link IllegalArgumentException}
+ * if {@code unwrapBlob} fails due to fatal errors (e.g stale or corrupted blob).
*
* @param wrappedBlob The wrapped blob with size on the order of 100 bytes.
* @return Unwrapped blob used for resume-on-reboot with the size on the order of 100 bytes.
- * @throws IOException if the implementation is unable to unwrap the wrapped blob successfully.
+ * @throws IOException if the implementation is unable to unwrap the wrapped blob successfully
+ * due to retry-able errors.
*/
@NonNull
public abstract byte[] onUnwrap(@NonNull byte[] wrappedBlob) throws IOException;