/*
* Copyright (c) 2012-2015 Spotify AB
*
* 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 com.spotify.netty4.handler.codec.zmtp;
import java.nio.ByteBuffer;
import java.security.SecureRandom;
import java.util.concurrent.atomic.AtomicLong;
/**
* A {@link ZMTPIdentityGenerator} that generates identities using a {@code long} counter.
*/
public class ZMTPLongIdentityGenerator implements ZMTPIdentityGenerator {
public static ZMTPLongIdentityGenerator GLOBAL = new ZMTPLongIdentityGenerator();
private static final AtomicLong peerIdCounter = new AtomicLong(new SecureRandom().nextLong());
@Override
public ByteBuffer generateIdentity(final ZMTPSession session) {
final ByteBuffer generated = ByteBuffer.allocate(9);
generated.put((byte) 0);
generated.putLong(peerIdCounter.incrementAndGet());
generated.flip();
return generated;
}
}