1 files changed, 26 insertions, 0 deletions
diff --git a/http-utils/src/main/java/ai/vespa/util/http/hc4/retry/Sleeper.java b/http-utils/src/main/java/ai/vespa/util/http/hc4/retry/Sleeper.java
new file mode 100644
index 00000000000..f593561888d
--- /dev/null
+++ b/http-utils/src/main/java/ai/vespa/util/http/hc4/retry/Sleeper.java
@@ -0,0 +1,26 @@
+// Copyright 2020 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package ai.vespa.util.http.hc4.retry;
+
+import java.time.Duration;
+
+/**
+ * An abstraction used for mocking {@link Thread#sleep(long)} in unit tests.
+ *
+ * @author bjorncs
+ */
+public interface Sleeper {
+    void sleep(Duration duration);
+
+    class Default implements Sleeper {
+        @Override
+        public void sleep(Duration duration) {
+            try {
+                Thread.sleep(duration.toMillis());
+            } catch (InterruptedException e) {
+                Thread.currentThread().interrupt();
+                throw new RuntimeException(e);
+            }
+        }
+    }
+}
+