Click here to Skip to main content
Click here to Skip to main content
Add your own
alternative version

Tagged as

Collect and Compare Log Statistics using LogJoin

, 22 Oct 2013
The LogJoin tool helps to collect any unstructured data from text files and join it to a simple table representation for easy analysis.
/*
 * Copyright (c) 2013, Yuriy Nelipovich
 * 
 * If you find this code useful or in case of any questions, suggestions
 * bug reports, donation, please email me: dev.yuriy.n@gmail.com
 */

using System;
using System.IO;
using System.Linq;

namespace LogJoin
{
    /// <summary>
    /// Sequence of text portions, each portion is a line.
    /// </summary>
    public class Input : IDisposable
    {
        private readonly StreamReader[] _readers;
        private readonly FileStream[] _streams;
        private int _lastSourceIndex;

        /// <summary>
        /// Contstructs new input
        /// </summary>
        /// <param name="filePaths">Sequence of files to read</param>
        public Input(string[] filePaths)
        {
            if (filePaths.Length == 0)
                throw new ArgumentException("Empty file list");
            this._streams =
                filePaths.Select(p => new FileStream(p, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)).ToArray();
            this._readers = this._streams.Select(s => new StreamReader(s)).ToArray();
        }

        public void Dispose()
        {
            foreach (var r in this._readers)
            {
                r.Dispose();
            }
            foreach (var s in this._streams)
            {
                s.Dispose();
            }
        }

        /// <summary>
        /// Moves the input to the start position
        /// </summary>
        public virtual void ResetPosition()
        {
            this._lastSourceIndex = 0;
            foreach (var stream in this._streams.Where(stream => stream.CanSeek))
            {
                stream.Seek(0, SeekOrigin.Begin);
            }
        }

        /// <summary>
        /// Rads the next text portion and moves to the next position
        /// </summary>
        /// <returns>The text portion of null if there is nothing to read</returns>
        public virtual string ReadTextPortion()
        {
            var line = this._readers[this._lastSourceIndex].ReadLine();
            if (line != null)
                return line;

            if (this._lastSourceIndex < this._readers.Length - 1)
            {
                this._lastSourceIndex++;
                return this.ReadTextPortion();
            }
            return null;
        }
    }
}

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

This article, along with any associated source code and files, is licensed under The BSD License

Share

About the Author

Yuriy Nelipovich
Software Developer CactusSoft
Belarus Belarus
No Biography provided

| Advertise | Privacy | Mobile
Web04 | 2.8.140827.1 | Last Updated 22 Oct 2013
Article Copyright 2013 by Yuriy Nelipovich
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid