/*
 * 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.activemq.artemis.core.remoting.impl.invm;

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

import org.apache.activemq.artemis.core.server.ActiveMQMessageBundle;

public final class InVMRegistry {

   public static final InVMRegistry instance = new InVMRegistry();

   private final ConcurrentMap<Integer, InVMAcceptor> acceptors = new ConcurrentHashMap<Integer, InVMAcceptor>();

   public void registerAcceptor(final int id, final InVMAcceptor acceptor) {
      if (acceptors.putIfAbsent(id, acceptor) != null) {
         throw ActiveMQMessageBundle.BUNDLE.acceptorExists(id);
      }
   }

   public void unregisterAcceptor(final int id) {
      if (acceptors.remove(id) == null) {
         throw ActiveMQMessageBundle.BUNDLE.acceptorNotExists(id);
      }
   }

   public InVMAcceptor getAcceptor(final int id) {
      return acceptors.get(id);
   }

   public void clear() {
      acceptors.clear();
   }

   public int size() {
      return acceptors.size();
   }
}
