[ONOS-6697] New HostDiscovery behavior
Change-Id: I8b6274ce18abf231db61c2e894b83aa842eecb9e
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/HostsDiscovery.java b/core/api/src/main/java/org/onosproject/net/behaviour/HostsDiscovery.java
new file mode 100644
index 0000000..393e551
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/HostsDiscovery.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * 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.behaviour;
+
+import org.onosproject.net.driver.HandlerBehaviour;
+import org.onosproject.net.host.HostDescription;
+
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Retrieving host information from the device
+ * and creating host descriptions.
+ */
+public interface HostsDiscovery extends HandlerBehaviour {
+
+ /**
+ * Returns a collection of discovered host descriptions.
+ * @return CompletableFuture containing, when completed, a collection of HostDescription
+ */
+ CompletableFuture<Set<HostDescription>> getHosts();
+}