core/net/src/main/java/org/onosproject/core/impl/StoreBasedIdBlockAllocator.java

/*
 * Copyright 2014 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.core.impl;

import org.onosproject.core.IdBlock;
import org.onosproject.core.IdBlockStore;

public class StoreBasedIdBlockAllocator implements IdBlockAllocator {
    private final IdBlockStore store;
    private final String topic;

    public StoreBasedIdBlockAllocator(String topic, IdBlockStore store) {
        this.topic = topic;
        this.store = store;
    }

    /**
     * Returns a block of IDs which are unique and unused.
     * Range of IDs is fixed size and is assigned incrementally as this method
     * called.
     *
     * @return an IdBlock containing a set of unique IDs
     */
    @Override
    public synchronized IdBlock allocateUniqueIdBlock() {
        return store.getIdBlock(topic);
    }

    @Override
    public IdBlock allocateUniqueIdBlock(long range) {
        throw new UnsupportedOperationException("Not supported yet");
    }
}