110 lines
4.5 KiB
C#
110 lines
4.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Web.Script.Serialization;
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namespace FileInterface.Scheduler
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{
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public sealed class WatcherJobRepository
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{
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private readonly object _sync = new object();
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private readonly string _fileName;
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private readonly JavaScriptSerializer _serializer = new JavaScriptSerializer();
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private List<WatcherJobConfig> _jobs;
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public WatcherJobRepository(string fileName)
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{
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_fileName = Path.GetFullPath(fileName);
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_serializer.MaxJsonLength = Int32.MaxValue;
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_jobs = LoadInternal();
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}
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public IList<WatcherJobConfig> GetAll()
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{
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lock (_sync) return Clone(_jobs);
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}
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public WatcherJobConfig GetById(string id)
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{
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lock (_sync)
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{
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WatcherJobConfig job = _jobs.FirstOrDefault(j => String.Equals(j.Id, id, StringComparison.OrdinalIgnoreCase));
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return job == null ? null : Clone(job);
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}
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}
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public WatcherJobConfig Save(WatcherJobConfig job)
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{
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if (job == null) throw new ArgumentNullException("job");
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Validate(job);
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lock (_sync)
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{
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if (String.IsNullOrWhiteSpace(job.Id)) job.Id = Guid.NewGuid().ToString("N");
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int index = _jobs.FindIndex(j => String.Equals(j.Id, job.Id, StringComparison.OrdinalIgnoreCase));
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if (index >= 0) _jobs[index] = Clone(job); else _jobs.Add(Clone(job));
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SaveInternal();
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return Clone(job);
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}
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}
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public bool Delete(string id)
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{
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lock (_sync)
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{
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int count = _jobs.RemoveAll(j => String.Equals(j.Id, id, StringComparison.OrdinalIgnoreCase));
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if (count > 0) SaveInternal();
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return count > 0;
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}
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}
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private List<WatcherJobConfig> LoadInternal()
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{
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if (!File.Exists(_fileName)) return new List<WatcherJobConfig>();
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string json = File.ReadAllText(_fileName, Encoding.UTF8);
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if (String.IsNullOrWhiteSpace(json)) return new List<WatcherJobConfig>();
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return _serializer.Deserialize<List<WatcherJobConfig>>(json) ?? new List<WatcherJobConfig>();
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}
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private void SaveInternal()
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{
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string dir = Path.GetDirectoryName(_fileName);
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if (!String.IsNullOrWhiteSpace(dir)) Directory.CreateDirectory(dir);
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string json = _serializer.Serialize(_jobs);
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string tmp = _fileName + ".tmp";
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File.WriteAllText(tmp, json, new UTF8Encoding(false));
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if (File.Exists(_fileName))
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{
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string backup = _fileName + ".bak";
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try { File.Replace(tmp, _fileName, backup, true); }
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catch { File.Delete(_fileName); File.Move(tmp, _fileName); }
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}
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else File.Move(tmp, _fileName);
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}
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private static void Validate(WatcherJobConfig job)
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{
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if (String.IsNullOrWhiteSpace(job.Name)) throw new InvalidOperationException("Name is required.");
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if (String.IsNullOrWhiteSpace(job.SourceDirectory)) throw new InvalidOperationException("SourceDirectory is required.");
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if (String.IsNullOrWhiteSpace(job.CustomFunction)) throw new InvalidOperationException("CustomFunction is required.");
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if (!job.WatchCreated && !job.WatchChanged && !job.WatchRenamed)
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throw new InvalidOperationException("At least one watcher event (Created, Changed, Renamed) must be enabled.");
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if (job.MoveFileAfterSuccess && String.IsNullOrWhiteSpace(job.MoveTargetDirectory))
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throw new InvalidOperationException("MoveTargetDirectory is required when MoveFileAfterSuccess=true.");
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if (job.InArgs == null) job.InArgs = new List<string>();
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if (String.IsNullOrWhiteSpace(job.SearchPattern)) job.SearchPattern = "*.*";
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if (job.JoinSeparator == null) job.JoinSeparator = ";";
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if (job.DebounceMilliseconds < 0) job.DebounceMilliseconds = 0;
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if (job.FileReadyRetries < 1) job.FileReadyRetries = 1;
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if (job.FileReadyRetries > 1000) job.FileReadyRetries = 1000;
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if (job.FileReadyDelayMilliseconds < 10) job.FileReadyDelayMilliseconds = 10;
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}
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private T Clone<T>(T value)
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{
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return _serializer.Deserialize<T>(_serializer.Serialize(value));
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}
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}
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}
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