public static bool Initialize(string userSpecifiedPath)
{
lock (loadLockObj)
{
if (isInitialized)
{
return(false);
}
isInitialized = false;
#if NET45 || NET46 || NET47
string path = userSpecifiedPath;
if (path == null)
{
// in net45, librdkafka.dll is not in the process directory, we have to load it manually
// and also search in the same folder for its dependencies (LOAD_WITH_ALTERED_SEARCH_PATH)
var is64 = IntPtr.Size == 8;
var baseUri = new Uri(Assembly.GetExecutingAssembly().GetName().EscapedCodeBase);
var baseDirectory = Path.GetDirectoryName(baseUri.LocalPath);
var dllDirectory = Path.Combine(
baseDirectory,
is64
? Path.Combine("librdkafka", "x64")
: Path.Combine("librdkafka", "x86"));
path = Path.Combine(dllDirectory, "librdkafka.dll");
if (!File.Exists(path))
{
dllDirectory = Path.Combine(
baseDirectory,
is64
? @"runtimes\win7-x64\native"
: @"runtimes\win7-x86\native");
path = Path.Combine(dllDirectory, "librdkafka.dll");
}
}
if (WindowsNative.LoadLibraryEx(path, IntPtr.Zero, WindowsNative.LoadLibraryFlags.LOAD_WITH_ALTERED_SEARCH_PATH) == IntPtr.Zero)
{
// catch the last win32 error by default and keep the associated default message
var win32Exception = new Win32Exception();
var additionalMessage =
$"Error while loading librdkafka.dll or its dependencies from {path}. " +
$"Check the directory exists, if not check your deployment process. " +
$"You can also load the library and its dependencies by yourself " +
$"before any call to Confluent.Kafka";
throw new InvalidOperationException(additionalMessage, win32Exception);
}
isInitialized = SetDelegates(typeof(NativeMethods.NativeMethods));
#else
const int RTLD_NOW = 2;
var nativeMethodTypes = new List <Type>();
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
if (userSpecifiedPath != null)
{
if (WindowsNative.LoadLibraryEx(userSpecifiedPath, IntPtr.Zero, WindowsNative.LoadLibraryFlags.LOAD_WITH_ALTERED_SEARCH_PATH) == IntPtr.Zero)
{
// TODO: The Win32Exception class is not available in .NET Standard, which is the easy way to get the message string corresponding to
// a win32 error. FormatMessage is not straightforward to p/invoke, so leaving this as a job for another day.
throw new InvalidOperationException($"Failed to load librdkafka at location '{userSpecifiedPath}'. Win32 error: {Marshal.GetLastWin32Error()}");
}
}
nativeMethodTypes.Add(typeof(NativeMethods.NativeMethods));
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
if (userSpecifiedPath != null)
{
if (PosixNative.dlopen(userSpecifiedPath, RTLD_NOW) == IntPtr.Zero)
{
throw new InvalidOperationException($"Failed to load librdkafka at location '{userSpecifiedPath}'. dlerror: '{PosixNative.LastError}'.");
}
}
nativeMethodTypes.Add(typeof(NativeMethods.NativeMethods));
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
if (userSpecifiedPath != null)
{
if (PosixNative.dlopen(userSpecifiedPath, RTLD_NOW) == IntPtr.Zero)
{
throw new InvalidOperationException($"Failed to load librdkafka at location '{userSpecifiedPath}'. dlerror: '{PosixNative.LastError}'.");
}
nativeMethodTypes.Add(typeof(NativeMethods.NativeMethods));
}
else
{
nativeMethodTypes.Add(typeof(NativeMethods.NativeMethods));
nativeMethodTypes.Add(typeof(NativeMethods.NativeMethods_Debian9));
}
}
else
{
throw new InvalidOperationException($"Unsupported platform: {RuntimeInformation.OSDescription}");
}
foreach (var t in nativeMethodTypes)
{
isInitialized = SetDelegates(t);
if (isInitialized)
{
break;
}
}
#endif
if (!isInitialized)
{
throw new DllNotFoundException("Failed to load the librdkafka native library.");
}
if ((long)version() < minVersion)
{
throw new FileLoadException($"Invalid librdkafka version {(long)version():x}, expected at least {minVersion:x}");
}
isInitialized = true;
// Protect the _destroy and _destroyMethodInfo objects from garbage collection. This is
// required since the Producer/Consumer finalizers may reference them, and they might
// have otherwise been cleaned up at that point. To keep things simple, there is no reference
// counting / corresponding Free() call - there is negligible overhead in keeping these
// references around for the lifetime of the process.
GCHandle.Alloc(_destroy, GCHandleType.Normal);
GCHandle.Alloc(_destroyMethodInfo, GCHandleType.Normal);
return(isInitialized);
}
}
private static bool InitializeDotNetCore(string userSpecifiedPath)
{
const int RTLD_NOW = 2;
var nativeMethodTypes = new List <Type>();
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
if (userSpecifiedPath != null)
{
if (WindowsNative.LoadLibraryEx(userSpecifiedPath, IntPtr.Zero, WindowsNative.LoadLibraryFlags.LOAD_WITH_ALTERED_SEARCH_PATH) == IntPtr.Zero)
{
// TODO: The Win32Exception class is not available in .NET Standard, which is the easy way to get the message string corresponding to
// a win32 error. FormatMessage is not straightforward to p/invoke, so leaving this as a job for another day.
throw new InvalidOperationException($"Failed to load librdkafka at location '{userSpecifiedPath}'. Win32 error: {Marshal.GetLastWin32Error()}");
}
}
nativeMethodTypes.Add(typeof(NativeMethods.NativeMethods));
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
if (userSpecifiedPath != null)
{
if (PosixNative.dlopen(userSpecifiedPath, RTLD_NOW) == IntPtr.Zero)
{
throw new InvalidOperationException($"Failed to load librdkafka at location '{userSpecifiedPath}'. dlerror: '{PosixNative.LastError}'.");
}
}
nativeMethodTypes.Add(typeof(NativeMethods.NativeMethods));
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
if (userSpecifiedPath != null)
{
if (PosixNative.dlopen(userSpecifiedPath, RTLD_NOW) == IntPtr.Zero)
{
throw new InvalidOperationException($"Failed to load librdkafka at location '{userSpecifiedPath}'. dlerror: '{PosixNative.LastError}'.");
}
nativeMethodTypes.Add(typeof(NativeMethods.NativeMethods));
}
else
{
nativeMethodTypes.Add(typeof(NativeMethods.NativeMethods));
nativeMethodTypes.Add(typeof(NativeMethods.NativeMethods_Debian9));
}
}
else
{
throw new InvalidOperationException($"Unsupported platform: {RuntimeInformation.OSDescription}");
}
foreach (var t in nativeMethodTypes)
{
if (SetDelegates(t))
{
return(true);
}
}
return(false);
}
