| /* |
| * 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.provider.pcep.tunnel.impl; |
| |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.slf4j.Logger; |
| |
| /** |
| * Unique Srp Id generator for pcep messages. |
| */ |
| public final class SrpIdGenerators { |
| |
| private static final Logger log = getLogger(SrpIdGenerators.class); |
| private static final AtomicInteger SRP_ID_GEN = new AtomicInteger(); |
| private static final int MAX_SRP_ID = 0x7FFFFFFF; |
| private static int srpId; |
| |
| /** |
| * Default constructor. |
| */ |
| private SrpIdGenerators() { |
| } |
| |
| /** |
| * Get the next srp id. |
| * |
| * @return srp id |
| */ |
| public static int create() { |
| do { |
| if (srpId >= MAX_SRP_ID) { |
| if (SRP_ID_GEN.get() >= MAX_SRP_ID) { |
| SRP_ID_GEN.set(0); |
| } |
| } |
| srpId = SRP_ID_GEN.incrementAndGet(); |
| } while (srpId > MAX_SRP_ID); |
| return srpId; |
| } |
| } |