Add token refresh to AthenzIdentityProvider implementation

Includes logic for retry: exponential backoff for instance registration,
linear backoff for credential updates. Moved instance registration +
credentials update logic to new class AthenzCredentialsService.

1 files changed, 3 insertions, 7 deletions

diff --git a/container-disc/src/main/java/com/yahoo/container/jdisc/athenz/AthenzIdentityProvider.java b/container-disc/src/main/java/com/yahoo/container/jdisc/athenz/AthenzIdentityProvider.java
index 418b3511ebb..033b396bc9b 100644
--- a/container-disc/src/main/java/com/yahoo/container/jdisc/athenz/AthenzIdentityProvider.java
+++ b/container-disc/src/main/java/com/yahoo/container/jdisc/athenz/AthenzIdentityProvider.java
@@ -1,15 +1,11 @@
 // Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.container.jdisc.athenz;
 
-import java.security.cert.X509Certificate;
-
 /**
  * @author mortent
  */
 public interface AthenzIdentityProvider {
-
-    String getNToken();
-    X509Certificate getX509Cert();
-    String domain();
-    String service();
+    String getNToken() throws AthenzIdentityProviderException;
+    String getDomain();
+    String getService();
 }