1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 package org.apache.mina.transport.nio; 20 21 import java.util.concurrent.atomic.AtomicInteger; 22 23 /** 24 * A fixed size pool of {@link SelectorLoop}. 25 * 26 * @author <a href="http://mina.apache.org">Apache MINA Project</a> 27 */ 28 public class FixedSelectorLoopPool implements SelectorLoopPool { 29 /** the pool of selector loop */ 30 private final SelectorLoop[] pool; 31 32 /** the index of the next selector loop to be served */ 33 private final AtomicInteger nextIndex = new AtomicInteger(); 34 35 /** 36 * Create a pool of "size" {@link SelectorLoop} 37 * 38 * @param size 39 */ 40 public FixedSelectorLoopPool(String prefix, final int size) { 41 if (size <= 0) { 42 throw new IllegalArgumentException("We can't create a pool with no Selectorloop in it"); 43 } 44 45 pool = new SelectorLoop[size]; 46 47 for (int i = 0; i < size; i++) { 48 pool[i] = new NioSelectorLoop(prefix + "-I/O", i); 49 } 50 } 51 52 /** 53 * {@inheritDoc} 54 */ 55 @Override 56 public SelectorLoop getSelectorLoop() { 57 return pool[Math.abs(nextIndex.incrementAndGet() % pool.length)]; 58 } 59 }