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/*
 * 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.cassandra.thrift;

import java.net.InetSocketAddress;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

import com.thinkaurelius.thrift.Message;
import com.thinkaurelius.thrift.TDisruptorServer;
import org.apache.cassandra.concurrent.JMXEnabledThreadPoolExecutor;
import org.apache.cassandra.concurrent.NamedThreadFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.thrift.server.TServer;
import org.apache.thrift.transport.TNonblockingServerTransport;
import org.apache.thrift.transport.TNonblockingSocket;
import org.apache.thrift.transport.TTransportException;

public class THsHaDisruptorServer extends TDisruptorServer
{
    private static final Logger logger = LoggerFactory.getLogger(THsHaDisruptorServer.class.getName());

    /**
     * All the arguments to Non Blocking Server will apply here. In addition,
     * executor pool will be responsible for creating the internal threads which
     * will process the data. threads for selection usually are equal to the
     * number of cpu's
     */
    public THsHaDisruptorServer(Args args)
    {
        super(args);
        logger.info("Starting up {}", this);
    }

    @Override
    protected void beforeInvoke(Message buffer)
    {
        TNonblockingSocket socket = (TNonblockingSocket) buffer.transport;
        ThriftSessionManager.instance.setCurrentSocket(socket.getSocketChannel().socket().getRemoteSocketAddress());
    }

    public void beforeClose(Message buffer)
    {
        TNonblockingSocket socket = (TNonblockingSocket) buffer.transport;
        ThriftSessionManager.instance.connectionComplete(socket.getSocketChannel().socket().getRemoteSocketAddress());
    }

    public static class Factory implements TServerFactory
    {
        @SuppressWarnings("resource")
        public TServer buildTServer(Args args)
        {
            if (DatabaseDescriptor.getClientEncryptionOptions().enabled)
                throw new RuntimeException("Client SSL is not supported for non-blocking sockets (hsha). Please remove client ssl from the configuration.");

            final InetSocketAddress addr = args.addr;
            TNonblockingServerTransport serverTransport;
            try
            {
                serverTransport = new TCustomNonblockingServerSocket(addr, args.keepAlive, args.sendBufferSize, args.recvBufferSize);
            }
            catch (TTransportException e)
            {
                throw new RuntimeException(String.format("Unable to create thrift socket to %s:%s", addr.getAddress(), addr.getPort()), e);
            }

            ThreadPoolExecutor invoker = new JMXEnabledThreadPoolExecutor(DatabaseDescriptor.getRpcMinThreads(),
                                                                          DatabaseDescriptor.getRpcMaxThreads(),
                                                                          60L,
                                                                          TimeUnit.SECONDS,
                                                                          new SynchronousQueue(),
                                                                          new NamedThreadFactory("RPC-Thread"), "RPC-THREAD-POOL");

            com.thinkaurelius.thrift.util.TBinaryProtocol.Factory protocolFactory = new com.thinkaurelius.thrift.util.TBinaryProtocol.Factory(true, true);

            TDisruptorServer.Args serverArgs = new TDisruptorServer.Args(serverTransport).useHeapBasedAllocation(true)
                                                                                         .inputTransportFactory(args.inTransportFactory)
                                                                                         .outputTransportFactory(args.outTransportFactory)
                                                                                         .inputProtocolFactory(protocolFactory)
                                                                                         .outputProtocolFactory(protocolFactory)
                                                                                         .processor(args.processor)
                                                                                         .maxFrameSizeInBytes(DatabaseDescriptor.getThriftFramedTransportSize())
                                                                                         .invocationExecutor(invoker)
                                                                                         .alwaysReallocateBuffers(true);

            return new THsHaDisruptorServer(serverArgs);
        }
    }
}