| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. The ASF licenses this file to you 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.apache.storm.streams; |
| |
| class UniqueIdGen { |
| private static final UniqueIdGen instance = new UniqueIdGen(); |
| private int streamCounter = 0; |
| private int spoutCounter = 0; |
| private int boltCounter = 0; |
| |
| private UniqueIdGen() { |
| } |
| |
| static UniqueIdGen getInstance() { |
| return instance; |
| } |
| |
| String getUniqueStreamId() { |
| streamCounter++; |
| return "s" + streamCounter; |
| } |
| |
| String getUniqueBoltId() { |
| boltCounter++; |
| return "bolt" + boltCounter; |
| } |
| |
| String getUniqueSpoutId() { |
| spoutCounter++; |
| return "spout" + spoutCounter; |
| } |
| |
| // for unit tests |
| void reset() { |
| streamCounter = 0; |
| spoutCounter = 0; |
| boltCounter = 0; |
| } |
| |
| } |
| |