content: /*
   * Copyright (C) 2020 ActiveJ LLC.
   *
   * 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 io.activej.dataflow.graph;
  
  import java.util.concurrent.ThreadLocalRandom;
  import java.util.concurrent.atomic.AtomicLong;
  
  /**
   * Represents a unique id of the stream.
   */
  public final class StreamId {
  	private static final AtomicLong seed = new AtomicLong(ThreadLocalRandom.current().nextInt() & (Integer.MAX_VALUE >>> 1));
  
  	private final long id;
  
  	public StreamId() {
  		id = seed.getAndIncrement();
  	}
  
  	public StreamId(long id) {
  		this.id = id;
  	}
  
  	public long getId() {
  		return id;
  	}
  
  	@Override
  	public boolean equals(Object o) {
  		if (this == o) return true;
  		if (o == null || getClass() != o.getClass()) return false;
  
  		StreamId streamId = (StreamId) o;
  
  		return id == streamId.id;
  	}
  
  	@Override
  	public int hashCode() {
  		return (int) (id ^ (id >>> 32));
  	}
  
  	@Override
  	public String toString() {
  		return "{" + id + '}';
  	}
  }
  