Remove serialization of ClusterSpec rotations

This data is only stored when `<rotations/>` is specified through
`services.xml`. Since we're removing that element, we can also remove the
serialization. It's not used in our shared routing layer.

The `rotations` field is still present in the `/loadbalancers/v1/` response as
the client of this API still expects it.

3 files changed, 13 insertions, 49 deletions

diff --git a/config-provisioning/src/main/java/com/yahoo/config/provision/ClusterMembership.java b/config-provisioning/src/main/java/com/yahoo/config/provision/ClusterMembership.java
index c0099878b45..abc1c381dc7 100644
--- a/config-provisioning/src/main/java/com/yahoo/config/provision/ClusterMembership.java
+++ b/config-provisioning/src/main/java/com/yahoo/config/provision/ClusterMembership.java
@@ -3,14 +3,9 @@ package com.yahoo.config.provision;
 
 import com.yahoo.component.Version;
 
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.Set;
-import java.util.stream.Collectors;
-
 /**
  * A node's membership in a cluster. This is a value object.
- * The format is "clusterType/clusterId/groupId/index[/exclusive][/retired][/rotationId,...]"
+ * The format is "clusterType/clusterId/groupId/index[/exclusive][/retired]"
  *
  * @author bratseth
  */
@@ -25,26 +20,23 @@ public class ClusterMembership {
 
     private ClusterMembership(String stringValue, Version vespaVersion) {
         String[] components = stringValue.split("/");
-        if (components.length < 4 || components.length > 7)
+        if (components.length < 4)
             throw new RuntimeException("Could not parse '" + stringValue + "' to a cluster membership. " +
                                        "Expected 'clusterType/clusterId/groupId/index[/retired][/exclusive][/rotationId,...]'");
 
         boolean exclusive = false;
-        Set<RotationName> rotations = Collections.emptySet();
         if (components.length > 4) {
             for (int i = 4; i < components.length; i++) {
                 String component = components[i];
                 switch (component) {
                     case "exclusive": exclusive = true; break;
                     case "retired": retired = true; break;
-                    default: rotations = rotationsFrom(component); break;
                 }
             }
         }
 
         this.cluster = ClusterSpec.from(ClusterSpec.Type.valueOf(components[0]), ClusterSpec.Id.from(components[1]),
-                                        ClusterSpec.Group.from(Integer.valueOf(components[2])), vespaVersion, exclusive,
-                                        rotations);
+                                        ClusterSpec.Group.from(Integer.valueOf(components[2])), vespaVersion, exclusive);
         this.index = Integer.parseInt(components[3]);
         this.stringValue = toStringValue();
     }
@@ -62,8 +54,7 @@ public class ClusterMembership {
                (cluster.group().isPresent() ? "/" + cluster.group().get().index() : "") +
                "/" + index +
                ( cluster.isExclusive() ? "/exclusive" : "") +
-               ( retired ? "/retired" : "") +
-               ( !cluster.rotations().isEmpty() ? "/" + rotationsAsString(cluster.rotations()) : "");
+               ( retired ? "/retired" : "");
 
     }
 
@@ -121,12 +112,4 @@ public class ClusterMembership {
         return new ClusterMembership(cluster, index, true);
     }
 
-    private static Set<RotationName> rotationsFrom(String s) {
-        return Arrays.stream(s.split(",")).map(RotationName::from).collect(Collectors.toUnmodifiableSet());
-    }
-
-    private static String rotationsAsString(Set<RotationName> rotations) {
-        return rotations.stream().map(RotationName::value).collect(Collectors.joining(","));
-    }
-
 }
diff --git a/config-provisioning/src/main/java/com/yahoo/config/provision/ClusterSpec.java b/config-provisioning/src/main/java/com/yahoo/config/provision/ClusterSpec.java
index 35ee538178a..8ed56b98705 100644
--- a/config-provisioning/src/main/java/com/yahoo/config/provision/ClusterSpec.java
+++ b/config-provisioning/src/main/java/com/yahoo/config/provision/ClusterSpec.java
@@ -1,7 +1,6 @@
 // Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.config.provision;
 
-import com.google.common.collect.ImmutableSortedSet;
 import com.yahoo.component.Version;
 
 import java.util.Objects;
@@ -23,19 +22,13 @@ public final class ClusterSpec {
     private final Optional<Group> groupId;
     private final Version vespaVersion;
     private boolean exclusive;
-    private final Set<RotationName> rotations;
 
-    private ClusterSpec(Type type, Id id, Optional<Group> groupId, Version vespaVersion, boolean exclusive,
-                        Set<RotationName> rotations) {
-        if (type != Type.container && !rotations.isEmpty()) {
-            throw new IllegalArgumentException("Rotations can only be declared for clusters of type " + Type.container);
-        }
+    private ClusterSpec(Type type, Id id, Optional<Group> groupId, Version vespaVersion, boolean exclusive) {
         this.type = type;
         this.id = id;
         this.groupId = groupId;
         this.vespaVersion = vespaVersion;
         this.exclusive = exclusive;
-        this.rotations = ImmutableSortedSet.copyOf(rotations);
     }
 
     /** Returns the cluster type */
@@ -57,35 +50,30 @@ public final class ClusterSpec {
      */
     public boolean isExclusive() { return exclusive; }
 
-    /** Returns the rotations of which this cluster should be a member */
-    public Set<RotationName> rotations() {
-        return rotations;
-    }
-
     public ClusterSpec with(Optional<Group> newGroup) {
-        return new ClusterSpec(type, id, newGroup, vespaVersion, exclusive, rotations);
+        return new ClusterSpec(type, id, newGroup, vespaVersion, exclusive);
     }
 
     public ClusterSpec exclusive(boolean exclusive) {
-        return new ClusterSpec(type, id, groupId, vespaVersion, exclusive, rotations);
+        return new ClusterSpec(type, id, groupId, vespaVersion, exclusive);
     }
 
     public static ClusterSpec request(Type type, Id id, Version vespaVersion, boolean exclusive) {
-        return new ClusterSpec(type, id, Optional.empty(), vespaVersion, exclusive, Set.of());
+        return new ClusterSpec(type, id, Optional.empty(), vespaVersion, exclusive);
     }
 
     // TODO: Remove after June 2019
     public static ClusterSpec request(Type type, Id id, Version vespaVersion, boolean exclusive, Set<RotationName> rotations) {
-        return new ClusterSpec(type, id, Optional.empty(), vespaVersion, exclusive, rotations);
+        return new ClusterSpec(type, id, Optional.empty(), vespaVersion, exclusive);
     }
 
     public static ClusterSpec from(Type type, Id id, Group groupId, Version vespaVersion, boolean exclusive) {
-        return new ClusterSpec(type, id, Optional.of(groupId), vespaVersion, exclusive, Set.of());
+        return new ClusterSpec(type, id, Optional.of(groupId), vespaVersion, exclusive);
     }
 
     // TODO: Remove after June 2019
     public static ClusterSpec from(Type type, Id id, Group groupId, Version vespaVersion, boolean exclusive, Set<RotationName> rotations) {
-        return new ClusterSpec(type, id, Optional.of(groupId), vespaVersion, exclusive, rotations);
+        return new ClusterSpec(type, id, Optional.of(groupId), vespaVersion, exclusive);
     }
 
     @Override
diff --git a/config-provisioning/src/test/java/com/yahoo/config/provision/ClusterMembershipTest.java b/config-provisioning/src/test/java/com/yahoo/config/provision/ClusterMembershipTest.java
index 9bd0680b691..5eee55a1886 100644
--- a/config-provisioning/src/test/java/com/yahoo/config/provision/ClusterMembershipTest.java
+++ b/config-provisioning/src/test/java/com/yahoo/config/provision/ClusterMembershipTest.java
@@ -6,7 +6,6 @@ import com.yahoo.component.Vtag;
 import org.junit.Test;
 
 import java.util.Collections;
-import java.util.Set;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
@@ -37,26 +36,25 @@ public class ClusterMembershipTest {
             assertTrue(instance.cluster().isExclusive());
         }
 
+        // TODO: Remove after June 2019. This ensures stale rotation data is handled
         {
             ClusterMembership instance = ClusterMembership.from("container/id1/4/37/rotation1,rotation2", Vtag.currentVersion);
             assertFalse(instance.retired());
             assertFalse(instance.cluster().isExclusive());
-            assertEquals(Set.of(RotationName.from("rotation1"), RotationName.from("rotation2")), instance.cluster().rotations());
         }
 
         {
             ClusterMembership instance = ClusterMembership.from("container/id1/4/37/exclusive/rotation1,rotation2", Vtag.currentVersion);
             assertFalse(instance.retired());
             assertTrue(instance.cluster().isExclusive());
-            assertEquals(Set.of(RotationName.from("rotation1"), RotationName.from("rotation2")), instance.cluster().rotations());
         }
 
         {
             ClusterMembership instance = ClusterMembership.from("container/id1/4/37/exclusive/retired/rotation1,rotation2", Vtag.currentVersion);
             assertTrue(instance.retired());
             assertTrue(instance.cluster().isExclusive());
-            assertEquals(Set.of(RotationName.from("rotation1"), RotationName.from("rotation2")), instance.cluster().rotations());
         }
+        // end TODO
     }
 
     @Test
@@ -101,7 +99,6 @@ public class ClusterMembershipTest {
         assertFalse(instance.cluster().group().isPresent());
         assertEquals(3, instance.index());
         assertEquals("container/id1/3", instance.stringValue());
-        assertTrue(instance.cluster().rotations().isEmpty());
     }
 
     private void assertContentService(ClusterMembership instance) {
@@ -111,7 +108,6 @@ public class ClusterMembershipTest {
         assertEquals(37, instance.index());
         assertFalse(instance.retired());
         assertEquals("content/id1/37", instance.stringValue());
-        assertTrue(instance.cluster().rotations().isEmpty());
     }
 
     private void assertContentServiceWithGroup(ClusterMembership instance) {
@@ -121,7 +117,6 @@ public class ClusterMembershipTest {
         assertEquals(37, instance.index());
         assertFalse(instance.retired());
         assertEquals("content/id1/4/37", instance.stringValue());
-        assertTrue(instance.cluster().rotations().isEmpty());
     }
 
     /** Serializing a spec without a group assigned works, but not deserialization */
@@ -131,7 +126,6 @@ public class ClusterMembershipTest {
         assertEquals(37, instance.index());
         assertTrue(instance.retired());
         assertEquals("content/id1/37/retired", instance.stringValue());
-        assertTrue(instance.cluster().rotations().isEmpty());
     }
 
     private void assertContentServiceWithGroupAndRetire(ClusterMembership instance) {
@@ -141,7 +135,6 @@ public class ClusterMembershipTest {
         assertEquals(37, instance.index());
         assertTrue(instance.retired());
         assertEquals("content/id1/4/37/retired", instance.stringValue());
-        assertTrue(instance.cluster().rotations().isEmpty());
     }
 
 }