+++ /dev/null
-/*
- * 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.Collections;
-import java.util.EnumSet;
-import java.util.Iterator;
-import java.util.concurrent.ConcurrentHashMap;
-
-import org.opendaylight.controller.hosttracker.Entity;
-import org.opendaylight.controller.hosttracker.IDeviceService;
-
-/**
- * An index that maps key fields of an entity uniquely to a device key
- */
-public class DeviceUniqueIndex extends DeviceIndex {
- /**
- * The index
- */
- private final ConcurrentHashMap<IndexedEntity, Long> index;
-
- /**
- * Construct a new device index using the provided key fields
- *
- * @param keyFields
- * the key fields to use
- */
- public DeviceUniqueIndex(EnumSet<IDeviceService.DeviceField> keyFields) {
- super(keyFields);
- index = new ConcurrentHashMap<IndexedEntity, Long>();
- }
-
- // ***********
- // DeviceIndex
- // ***********
-
- @Override
- public Iterator<Long> queryByEntity(Entity entity) {
- final Long deviceKey = findByEntity(entity);
- if (deviceKey != null)
- return Collections.<Long> singleton(deviceKey).iterator();
-
- return Collections.<Long> emptySet().iterator();
- }
-
- @Override
- public Iterator<Long> getAll() {
- return index.values().iterator();
- }
-
- @Override
- public boolean updateIndex(Device device, Long deviceKey) {
- for (Entity e : device.entities) {
- IndexedEntity ie = new IndexedEntity(keyFields, e);
- if (!ie.hasNonNullKeys())
- continue;
-
- Long ret = index.putIfAbsent(ie, deviceKey);
- if (ret != null && !ret.equals(deviceKey)) {
- // If the return value is non-null, then fail the insert
- // (this implies that a device using this entity has
- // already been created in another thread).
- return false;
- }
- }
- return true;
- }
-
- @Override
- public void updateIndex(Entity entity, Long deviceKey) {
- IndexedEntity ie = new IndexedEntity(keyFields, entity);
- if (!ie.hasNonNullKeys())
- return;
- index.put(ie, 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);
- index.remove(ie, deviceKey);
- }
-
- // **************
- // Public Methods
- // **************
-
- /**
- * Look up a {@link Device} based on the provided {@link Entity}.
- *
- * @param entity
- * the entity to search for
- * @return The key for the {@link Device} object if found
- */
- public Long findByEntity(Entity entity) {
- IndexedEntity ie = new IndexedEntity(keyFields, entity);
- Long deviceKey = index.get(ie);
- if (deviceKey == null)
- return null;
- return deviceKey;
- }
-
-}