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QuestDB is High Performance Time Series Database

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 * Copyright (C) 2014-2016 Appsicle
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 * This program is free software: you can redistribute it and/or  modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program 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
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package com.questdb.net.ha;

import com.questdb.log.Log;
import com.questdb.log.LogFactory;

import java.io.IOException;
import java.net.SocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.WritableByteChannel;

class StatsCollectingWritableByteChannel implements WritableByteChannel {

    private final static Log LOG = LogFactory.getLog(StatsCollectingWritableByteChannel.class);

    private final SocketAddress socketAddress;
    private WritableByteChannel delegate;
    private long startTime;
    private long byteCount;
    private long callCount;

    public StatsCollectingWritableByteChannel(SocketAddress socketAddress) {
        this.socketAddress = socketAddress;
    }

    @Override
    public boolean isOpen() {
        return delegate.isOpen();
    }

    @Override
    public void close() throws IOException {
        delegate.close();
    }

    public void logStats() {
        if (byteCount > 10) {
            long endTime = System.currentTimeMillis();
            LOG.info().$("sent ").$(byteCount).$(" bytes @ ").$((double) (byteCount * 1000) / ((endTime - startTime)) / 1024 / 1024).$(" MB/s from: ").$(socketAddress.toString()).$(" [").$(callCount).$(" calls]").$();
        }
    }

    public void setDelegate(WritableByteChannel delegate) {
        this.delegate = delegate;
        this.startTime = System.currentTimeMillis();
        this.byteCount = 0;
        this.callCount = 0;
    }

    @Override
    public int write(ByteBuffer src) throws IOException {
        callCount++;
        int count = delegate.write(src);
        this.byteCount += count;
        return count;
    }

}