org.apache.accumulo.server.rpc.CustomThreadedSelectorServer.java Source code

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Here is the source code for org.apache.accumulo.server.rpc.CustomThreadedSelectorServer.java

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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.accumulo.server.rpc;

import java.lang.reflect.Field;
import java.net.Socket;

import org.apache.thrift.server.TThreadedSelectorServer;
import org.apache.thrift.transport.TNonblockingSocket;
import org.apache.thrift.transport.TNonblockingTransport;
import org.slf4j.LoggerFactory;

public class CustomThreadedSelectorServer extends TThreadedSelectorServer {

    private final Field fbTansportField;

    public CustomThreadedSelectorServer(Args args) {
        super(args);

        try {
            fbTansportField = FrameBuffer.class.getDeclaredField("trans_");
            fbTansportField.setAccessible(true);
        } catch (SecurityException | NoSuchFieldException e) {
            throw new RuntimeException("Failed to access required field in Thrift code.", e);
        }
    }

    private TNonblockingTransport getTransport(FrameBuffer frameBuffer) {
        try {
            return (TNonblockingTransport) fbTansportField.get(frameBuffer);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    protected Runnable getRunnable(FrameBuffer frameBuffer) {
        return () -> {

            try {
                TNonblockingTransport transport = getTransport(frameBuffer);

                if (transport instanceof TNonblockingSocket) {
                    // This block of code makes the client address available to the server side code that
                    // executes a RPC. It is made available for informational purposes.
                    TNonblockingSocket tsock = (TNonblockingSocket) transport;
                    Socket sock = tsock.getSocketChannel().socket();
                    TServerUtils.clientAddress.set(sock.getInetAddress().getHostAddress() + ":" + sock.getPort());
                }
            } catch (Exception e) {
                LoggerFactory.getLogger(CustomThreadedSelectorServer.class).warn("Failed to get client address ",
                        e);
            }
            frameBuffer.invoke();
        };
    }

}