public IJobAssembly Load(string jobsPath)
{
var dllFiles = Directory.GetFiles(jobsPath, "*.dll");
var jobFilePath = "";
foreach (var dllFile in dllFiles)
{
var tempAlc = new HostAssemblyLoadContext(dllFile);
Assembly tempAssembly;
using (var stream = File.OpenRead(dllFile))
{
tempAssembly = tempAlc.LoadFromStream((Stream)stream);
}
var types = tempAssembly.GetTypes();
var jobClass = types.SingleOrDefault(x => x.GetInterfaces().Contains(typeof(IJob)));
tempAlc.Unload();
if (jobClass != null)
{
jobFilePath = dllFile;
break;
}
}
if (string.IsNullOrEmpty(jobFilePath))
{
return(null);
}
var alc = new HostAssemblyLoadContext(jobFilePath);
var alcWeakRef = new WeakReference(alc);
Assembly assembly;
using (var stream = File.OpenRead(jobFilePath))
{
assembly = alc.LoadFromStream((Stream)stream);
}
var jobType = assembly.GetTypes().SingleOrDefault(x => x.GetInterfaces().Contains(typeof(IJob)));
if (jobType == null)
{
return(null);
}
var containerBuilder = new ContainerBuilder();
var configurationBuilder = new ConfigurationBuilder()
.SetBasePath(jobsPath)
.AddJsonFile($"appsettings.json", true, true)
.AddEnvironmentVariables();
foreach (var appSettingFile in Directory.GetFiles(jobsPath, "appsettings.*.json"))
{
configurationBuilder.AddJsonFile(Path.GetFileName(appSettingFile));
}
var config = configurationBuilder.Build();
containerBuilder.RegisterInstance((ConfigurationRoot)config);
MethodInfo methodInfo = jobType.GetMethod("Register");
if (methodInfo == null)
{
return(null);
}
methodInfo.Invoke(null, new object[] { containerBuilder });
var container = containerBuilder.Build();
var jobInstance = (IJob)Instance(jobType, container);
var jobAssembly = new JobAssembly()
{
Instance = jobInstance,
UniqueId = Guid.NewGuid(),
Assembly = assembly,
HostAssemblyLoadContext = alc,
WeakReference = alcWeakRef,
JobFullPath = jobFilePath,
FileMD5Hash = _fileHelper.CalculateMD5(jobFilePath)
};
return(jobAssembly);
}
