ONOS-6613 Non-disruptive intent reallocation
Change-Id: I5d051c20402a226ad540b8bc08695b602ff75273
diff --git a/core/api/src/main/java/org/onosproject/net/intent/constraint/NonDisruptiveConstraint.java b/core/api/src/main/java/org/onosproject/net/intent/constraint/NonDisruptiveConstraint.java
new file mode 100644
index 0000000..4e5fb6b
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+++ b/core/api/src/main/java/org/onosproject/net/intent/constraint/NonDisruptiveConstraint.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.net.intent.constraint;
+
+import org.onosproject.net.intent.ConnectivityIntent;
+import org.onosproject.net.intent.Intent;
+
+/**
+ * Constraint to request a non-disruptive intent reallocation.
+ */
+public final class NonDisruptiveConstraint extends MarkerConstraint {
+
+ private static final NonDisruptiveConstraint NON_DISRUPTIVE_CONSTRAINT = new NonDisruptiveConstraint();
+
+ protected NonDisruptiveConstraint() {
+ }
+
+ /**
+ * Determines whether the intent requires a non-disruptive reallocation.
+ *
+ * @param intent intent to be inspected
+ * @return whether the intent has a NonDisruptiveConstraint
+ */
+ public static boolean requireNonDisruptive(Intent intent) {
+ if (intent instanceof ConnectivityIntent) {
+ ConnectivityIntent connectivityIntent = (ConnectivityIntent) intent;
+ return connectivityIntent.constraints().stream()
+ .anyMatch(p -> p instanceof NonDisruptiveConstraint);
+ }
+ return false;
+ }
+
+ /**
+ * Returns the nonDisruptiveConstraint.
+ *
+ * @return non-disruptive constraint
+ */
+ public static NonDisruptiveConstraint nonDisruptive() {
+ return NON_DISRUPTIVE_CONSTRAINT;
+ }
+
+ @Override
+ public String toString() {
+ return "Non-disruptive reallocation required";
+ }
+}