AcceptorSelectorEventHandler.java

/*
 * Copyright (c) 2001-2017, Zoltan Farkas All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Additionally licensed with:
 *
 * 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 org.spf4j.io.tcp;

import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import java.io.IOException;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ExecutorService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.spf4j.ds.UpdateablePriorityQueue;

/**
 *
 * @author zoly
 */
@SuppressFBWarnings("HES_EXECUTOR_NEVER_SHUTDOWN")
public final class AcceptorSelectorEventHandler extends SelectorEventHandler {

    private static final Logger LOG = LoggerFactory.getLogger(AcceptorSelectorEventHandler.class);

    private final ClientHandler clientHandler;
    private final ServerSocketChannel serverChannel;
    private final Selector selector;
    private final ExecutorService exec;
    private final BlockingQueue<Runnable> tasksToRunBySelector;
    private final UpdateablePriorityQueue<DeadlineAction> deadlineActions;

    @SuppressFBWarnings("EI_EXPOSE_REP2")
    public AcceptorSelectorEventHandler(final ServerSocketChannel channel,
            final ClientHandler clientHandler, final Selector selector, final ExecutorService exec,
            final BlockingQueue<Runnable> tasksToRunBySelector,
            final UpdateablePriorityQueue<DeadlineAction> deadlineActions) {
        this.serverChannel = channel;
        this.clientHandler = clientHandler;
        this.selector = selector;
        this.exec = exec;
        this.tasksToRunBySelector = tasksToRunBySelector;
        this.deadlineActions = deadlineActions;
    }

    @Override
    public void run(final SelectionKey key) throws IOException {
            if (!key.isAcceptable()) {
                throw new IllegalStateException("selection key must be acceptable " + key);
            }
            SocketChannel clientChannel;
            while ((clientChannel = serverChannel.accept()) != null) {
                try {
                    LOG.debug("Accepted {}", clientChannel);
                    clientChannel.configureBlocking(false);
                    clientHandler.handle(selector, clientChannel, exec, tasksToRunBySelector, deadlineActions);
                } catch (IOException ex) {
                    clientChannel.close();
                    throw ex;
                }
            }
    }


    @Override
    public boolean canRunAsync() {
        return false;
    }

    @Override
    public void runAsync(final SelectionKey key) {
        throw new UnsupportedOperationException();
    }

    @Override
    public SelectionKey initialInterestRegistration() throws ClosedChannelException {
        return serverChannel.register(selector, SelectionKey.OP_ACCEPT, this);
    }

    @Override
    public String toString() {
        return "AcceptorSelectorEventHandler{" + "clientHandler=" + clientHandler + ", serverChannel="
                + serverChannel + ", selector=" + selector + ", exec=" + exec + ", tasksToRunBySelector="
                + tasksToRunBySelector + ", deadlineActions=" + deadlineActions + '}';
    }



}