Tidied up the Stamper module and upgraded to a 1.34 dependency

Added stamper.revert method to be used for rollback - rolling back to a previous
commit in case of deleting all documents or rolling operations back should reset
the stamper as well

Added type alias for Opstamp - helps code readibility instead of seeing u64
returned by functions.

Moved to AtomicU64 on stable rust (since 1.34) - where possible use standard
library interfaces.

1 files changed, 4 insertions, 3 deletions

diff --git a/src/core/segment_meta.rs b/src/core/segment_meta.rs
index 9478663..7ad7ecf 100644
--- a/src/core/segment_meta.rs
+++ b/src/core/segment_meta.rs
@@ -1,6 +1,7 @@
 use super::SegmentComponent;
 use census::{Inventory, TrackedObject};
 use core::SegmentId;
+use indexer::Opstamp;
 use serde;
 use std::collections::HashSet;
 use std::fmt;
@@ -13,7 +14,7 @@ lazy_static! {
 #[derive(Clone, Debug, Serialize, Deserialize)]
 struct DeleteMeta {
     num_deleted_docs: u32,
-    opstamp: u64,
+    opstamp: Opstamp,
 }
 
 /// `SegmentMeta` contains simple meta information about a segment.
@@ -138,7 +139,7 @@ impl SegmentMeta {
 
     /// Returns the opstamp of the last delete operation
     /// taken in account in this segment.
-    pub fn delete_opstamp(&self) -> Option<u64> {
+    pub fn delete_opstamp(&self) -> Option<Opstamp> {
         self.tracked
             .deletes
             .as_ref()
@@ -152,7 +153,7 @@ impl SegmentMeta {
     }
 
     #[doc(hidden)]
-    pub fn with_delete_meta(self, num_deleted_docs: u32, opstamp: u64) -> SegmentMeta {
+    pub fn with_delete_meta(self, num_deleted_docs: u32, opstamp: Opstamp) -> SegmentMeta {
         let delete_meta = DeleteMeta {
             num_deleted_docs,
             opstamp,