HostTracker Bundle Separation

[controller.git] / opendaylight / hosttracker_new / implementation / src / main / java / org / opendaylight / controller / hosttracker / internal / DeviceMultiIndex.java

diff --git a/opendaylight/hosttracker_new/implementation/src/main/java/org/opendaylight/controller/hosttracker/internal/DeviceMultiIndex.java b/opendaylight/hosttracker_new/implementation/src/main/java/org/opendaylight/controller/hosttracker/internal/DeviceMultiIndex.java
new file mode 100644 (file)
index 0000000..85cb094
--- /dev/null
+++ b/opendaylight/hosttracker_new/implementation/src/main/java/org/opendaylight/controller/hosttracker/internal/DeviceMultiIndex.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2012 Big Switch Networks, Inc.
+ *
+ * Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/legal/epl-v10.html
+ *
+ * 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.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *
+ *    Originally created by David Erickson, Stanford University
+ *
+ *    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.opendaylight.controller.hosttracker.internal;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.EnumSet;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.opendaylight.controller.hosttracker.Entity;
+import org.opendaylight.controller.hosttracker.IDeviceService.DeviceField;
+import org.opendaylight.controller.sal.utils.IterableIterator;
+
+/**
+ * An index that maps key fields of an entity to device keys, with multiple
+ * device keys allowed per entity
+ */
+public class DeviceMultiIndex extends DeviceIndex {
+    /**
+     * The index
+     */
+    private ConcurrentHashMap<IndexedEntity, Collection<Long>> index;
+
+    /**
+     * @param keyFields
+     */
+    public DeviceMultiIndex(EnumSet<DeviceField> keyFields) {
+        super(keyFields);
+        index = new ConcurrentHashMap<IndexedEntity, Collection<Long>>();
+    }
+
+    // ***********
+    // DeviceIndex
+    // ***********
+
+    @Override
+    public Iterator<Long> queryByEntity(Entity entity) {
+        IndexedEntity ie = new IndexedEntity(keyFields, entity);
+        Collection<Long> devices = index.get(ie);
+        if (devices != null)
+            return devices.iterator();
+
+        return Collections.<Long> emptySet().iterator();
+    }
+
+    @Override
+    public Iterator<Long> getAll() {
+        Iterator<Collection<Long>> iter = index.values().iterator();
+        return new IterableIterator<Long>(iter);
+    }
+
+    @Override
+    public boolean updateIndex(Device device, Long deviceKey) {
+        for (Entity e : device.entities) {
+            updateIndex(e, deviceKey);
+        }
+        return true;
+    }
+
+    @Override
+    public void updateIndex(Entity entity, Long deviceKey) {
+        Collection<Long> devices = null;
+
+        IndexedEntity ie = new IndexedEntity(keyFields, entity);
+        if (!ie.hasNonNullKeys())
+            return;
+
+        devices = index.get(ie);
+        if (devices == null) {
+            Map<Long, Boolean> chm = new ConcurrentHashMap<Long, Boolean>();
+            devices = Collections.newSetFromMap(chm);
+            Collection<Long> r = index.putIfAbsent(ie, devices);
+            if (r != null)
+                devices = r;
+        }
+
+        devices.add(deviceKey);
+    }
+
+    @Override
+    public void removeEntity(Entity entity) {
+        IndexedEntity ie = new IndexedEntity(keyFields, entity);
+        index.remove(ie);
+    }
+
+    @Override
+    public void removeEntity(Entity entity, Long deviceKey) {
+        IndexedEntity ie = new IndexedEntity(keyFields, entity);
+        Collection<Long> devices = index.get(ie);
+        if (devices != null)
+            devices.remove(deviceKey);
+    }
+}