[AETHER-76] Impelentation of a new Trellis Troubleshoot Tool (T3) for offline mode
- For the performance improvement, T3 offline mode uses snapshots of the network states
called Network Information Base (NIB) instead of runtime interactions with ONOS core
during troubleshooting a Trellis system.
- Partially tested with some mininet topos for trellis
(https://github.com/opennetworkinglab/routing/tree/master/trellis).
- Usage instruction docs (https://docs.trellisfabric.org/troubleshooting.html).
Change-Id: Ice608f77aa96bfbcadfff34991c4a1b6d93125b6
(cherry picked from commit eaa6329aba67c2577fdca7d3ddf230611e82f9f7)
diff --git a/app/src/main/java/org/onosproject/t3/api/LinkNib.java b/app/src/main/java/org/onosproject/t3/api/LinkNib.java
new file mode 100644
index 0000000..02acb54
--- /dev/null
+++ b/app/src/main/java/org/onosproject/t3/api/LinkNib.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2020-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.t3.api;
+
+import com.google.common.collect.ImmutableSet;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.Link;
+
+import java.util.Set;
+import java.util.stream.Collectors;
+
+/**
+ * Represents Network Information Base (NIB) for links
+ * and supports alternative functions to
+ * {@link org.onosproject.net.link.LinkService} for offline data.
+ */
+public class LinkNib {
+
+ // TODO with method optimization, store into subdivided structures at the first load
+ private Set<Link> links;
+
+ // use the singleton helper to create the instance
+ protected LinkNib() {
+ }
+
+ /**
+ * Sets a set of links.
+ *
+ * @param links link set
+ */
+ public void setLinks(Set<Link> links) {
+ this.links = links;
+ }
+
+ /**
+ * Returns the set of links.
+ *
+ * @return link set
+ */
+ public Set<Link> getLinks() {
+ return ImmutableSet.copyOf(links);
+ }
+
+ /**
+ * Returns set of all infrastructure links leading from the specified
+ * connection point.
+ *
+ * @param connectPoint connection point
+ * @return set of device egress links
+ */
+ public Set<Link> getEgressLinks(ConnectPoint connectPoint) {
+ Set<Link> egressLinks = links.stream()
+ .filter(link -> connectPoint.equals(link.src()))
+ .collect(Collectors.toSet());
+ return egressLinks != null ? ImmutableSet.copyOf(egressLinks) : ImmutableSet.of();
+ }
+
+ /**
+ * Returns the singleton instance of links NIB.
+ *
+ * @return instance of links NIB
+ */
+ public static LinkNib getInstance() {
+ return LinkNib.SingletonHelper.INSTANCE;
+ }
+
+ private static class SingletonHelper {
+ private static final LinkNib INSTANCE = new LinkNib();
+ }
+
+}