ONOS checkin based on commit tag e796610b1f721d02f9b0e213cf6f7790c10ecd60

Change-Id: Ife8810491034fe7becdba75dda20de4267bd15cd

1 files changed, 152 insertions, 0 deletions

diff --git a/framework/src/onos/core/net/src/main/java/org/onosproject/net/newresource/impl/ResourceLinkListener.java b/framework/src/onos/core/net/src/main/java/org/onosproject/net/newresource/impl/ResourceLinkListener.java
new file mode 100644
index 00000000..f04c78b9
--- /dev/null
+++ b/framework/src/onos/core/net/src/main/java/org/onosproject/net/newresource/impl/ResourceLinkListener.java
@@ -0,0 +1,152 @@
+/*
+ * Copyright 2015 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.newresource.impl;
+
+import org.onlab.packet.MplsLabel;
+import org.onlab.packet.VlanId;
+import org.onlab.util.ItemNotFoundException;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.Link;
+import org.onosproject.net.LinkKey;
+import org.onosproject.net.behaviour.MplsQuery;
+import org.onosproject.net.behaviour.VlanQuery;
+import org.onosproject.net.driver.DriverHandler;
+import org.onosproject.net.driver.DriverService;
+import org.onosproject.net.link.LinkEvent;
+import org.onosproject.net.link.LinkListener;
+import org.onosproject.net.newresource.ResourceAdminService;
+import org.onosproject.net.newresource.ResourcePath;
+
+import java.util.List;
+import java.util.concurrent.ExecutorService;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * An implementation of LinkListener registering links as resources.
+ */
+final class ResourceLinkListener implements LinkListener {
+
+    private static final int TOTAL_VLANS = 1024;
+    private static final List<VlanId> ENTIRE_VLAN_IDS = getEntireVlans();
+
+    private static final int TOTAL_MPLS_LABELS = 1048576;
+    private static final List<MplsLabel> ENTIRE_MPLS_LABELS = getEntireMplsLabels();
+
+    private final ResourceAdminService adminService;
+    private final DriverService driverService;
+    private final ExecutorService executor;
+
+    /**
+     * Creates an instance with the specified ResourceAdminService and ExecutorService.
+     *
+     * @param adminService instance invoked to register resources
+     * @param driverService driver service instance
+     * @param executor executor used for processing resource registration
+     */
+    ResourceLinkListener(ResourceAdminService adminService, DriverService driverService, ExecutorService executor) {
+        this.adminService = checkNotNull(adminService);
+        this.driverService = checkNotNull(driverService);
+        this.executor = checkNotNull(executor);
+    }
+
+    @Override
+    public void event(LinkEvent event) {
+        Link link = event.subject();
+        switch (event.type()) {
+            case LINK_ADDED:
+                registerLinkResource(link);
+                break;
+            case LINK_REMOVED:
+                unregisterLinkResource(link);
+                break;
+            default:
+                break;
+        }
+    }
+
+    private void registerLinkResource(Link link) {
+        executor.submit(() -> {
+            // register the link
+            LinkKey linkKey = LinkKey.linkKey(link);
+            adminService.registerResources(ResourcePath.ROOT, linkKey);
+
+            ResourcePath linkPath = new ResourcePath(linkKey);
+            // register VLAN IDs against the link
+            if (isEnabled(link, this::isVlanEnabled)) {
+                adminService.registerResources(linkPath, ENTIRE_VLAN_IDS);
+            }
+
+            // register MPLS labels against the link
+            if (isEnabled(link, this::isMplsEnabled)) {
+                adminService.registerResources(linkPath, ENTIRE_MPLS_LABELS);
+            }
+        });
+    }
+
+    private void unregisterLinkResource(Link link) {
+        LinkKey linkKey = LinkKey.linkKey(link);
+        executor.submit(() -> adminService.unregisterResources(ResourcePath.ROOT, linkKey));
+    }
+
+    private boolean isEnabled(Link link, Predicate<ConnectPoint> predicate) {
+        return predicate.test(link.src()) && predicate.test(link.dst());
+    }
+
+    private boolean isVlanEnabled(ConnectPoint cp) {
+        try {
+            DriverHandler handler = driverService.createHandler(cp.deviceId());
+            if (handler == null) {
+                return false;
+            }
+
+            VlanQuery query = handler.behaviour(VlanQuery.class);
+            return query != null && query.isEnabled(cp.port());
+        } catch (ItemNotFoundException e) {
+            return false;
+        }
+    }
+
+    private boolean isMplsEnabled(ConnectPoint cp) {
+        try {
+            DriverHandler handler = driverService.createHandler(cp.deviceId());
+            if (handler == null) {
+                return false;
+            }
+
+            MplsQuery query = handler.behaviour(MplsQuery.class);
+            return query != null && query.isEnabled(cp.port());
+        } catch (ItemNotFoundException e) {
+            return false;
+        }
+    }
+
+    private static List<VlanId> getEntireVlans() {
+        return IntStream.range(0, TOTAL_VLANS)
+                .mapToObj(x -> VlanId.vlanId((short) x))
+                .collect(Collectors.toList());
+    }
+
+    private static List<MplsLabel> getEntireMplsLabels() {
+        // potentially many objects are created
+        return IntStream.range(0, TOTAL_MPLS_LABELS)
+                .mapToObj(MplsLabel::mplsLabel)
+                .collect(Collectors.toList());
+    }
+}