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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using Duplicati.Library.Interface;
namespace Duplicati.Library.Main.Volumes
{
public abstract class VolumeWriterBase : VolumeBase, IDisposable
{
protected ICompression m_compression;
protected Library.Utility.TempFile m_localfile;
protected string m_volumename;
public string LocalFilename { get { return m_localfile; } }
public string RemoteFilename { get { return m_volumename; } }
public Library.Utility.TempFile TempFile { get { return m_localfile; } }
public abstract RemoteVolumeType FileType { get; }
public long VolumeID { get; set; }
public void SetRemoteFilename(string name)
{
m_volumename = name;
}
public VolumeWriterBase(Options options)
: this(options, DateTime.UtcNow)
{
}
public static string GenerateGuid(Options options)
{
var s = Guid.NewGuid().ToString("N");
//We can choose shorter GUIDs here
return s;
}
public void ResetRemoteFilename(Options options, DateTime timestamp)
{
m_volumename = GenerateFilename(this.FileType, options.Prefix, GenerateGuid(options), timestamp, options.CompressionModule, options.NoEncryption ? null : options.EncryptionModule);
}
public VolumeWriterBase(Options options, DateTime timestamp)
: base(options)
{
m_localfile = new Library.Utility.TempFile();
ResetRemoteFilename(options, timestamp);
m_compression = DynamicLoader.CompressionLoader.GetModule(options.CompressionModule, m_localfile, options.RawOptions);
if(m_compression == null)
throw new Exception(string.Format("Unsupported compression module: {0}", options.CompressionModule));
if ((this is IndexVolumeWriter || this is FilesetVolumeWriter) && m_compression is Library.Interface.ICompressionHinting)
((Library.Interface.ICompressionHinting)m_compression).LowOverheadMode = true;
AddManifestfile();
}
protected void AddManifestfile()
{
using (var sr = new StreamWriter(m_compression.CreateFile(MANIFEST_FILENAME, CompressionHint.Compressible, DateTime.UtcNow), ENCODING))
sr.Write(ManifestData.GetManifestInstance(m_blocksize, m_blockhash, m_filehash));
}
public virtual void Dispose()
{
if (m_compression != null)
try { m_compression.Dispose(); }
finally { m_compression = null; }
if (m_localfile != null)
try { m_localfile.Dispose(); }
finally { m_localfile = null; }
m_volumename = null;
}
public virtual void Close()
{
if (m_compression != null)
try { m_compression.Dispose(); }
finally { m_compression = null; }
}
public long Filesize { get { return m_compression.Size + m_compression.FlushBufferSize; } }
public void SetTempFile(Library.Utility.TempFile tmpfile)
{
if (m_localfile != null)
m_localfile.Dispose();
m_localfile = tmpfile;
}
}
}
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