//// ===========================================================================================================
//// Methods
//// ===========================================================================================================
/// <summary>
/// Starts the server by waiting for requests (via the <paramref name="readLineFunc"/>) and then sending
/// responses via <paramref name="writeLineAction"/>.
/// </summary>
/// <param name="readLineFunc">
/// The function to call to wait for an incoming command, serialized on a single line.
/// </param>
/// <param name="writeLineAction">
/// The action to call when a response is sent back to the client, serialized on a singe line.
/// </param>
/// <param name="registry">A <see cref="IWin32Registry"/> to use for executing registry commands.</param>
public void Start(ReadLineFunc readLineFunc, WriteLineAction writeLineAction, IWin32Registry registry)
{
Param.VerifyNotNull(readLineFunc, nameof(readLineFunc));
Param.VerifyNotNull(writeLineAction, nameof(writeLineAction));
Param.VerifyNotNull(registry, nameof(registry));
var commandExecutor = new CommandExecutor(_logger, registry);
// This is the loop that waits for an incoming request (ReadLine), executes a command, and then returns a
// response via WriteLine.
bool shutdownRequested = false;
while (!shutdownRequested)
{
_logger.LogDebug("Waiting for request");
string serializedCommand = readLineFunc();
_logger.LogInfo("Request received: ", serializedCommand);
IServiceCommandResponse response;
if (!ServiceCommand.TryDeserializeFromJsonString(
serializedCommand,
out IServiceCommand command,
out IServiceCommandResponse errorResponse))
{
response = errorResponse;
}
public void TryDeserializeFromJsonString_should_correctly_deserialize_a_RegistryReadStringValueCommand()
{
string jsonString = $@"
{{
{ParamName.CommandName}: ""{ServiceCommandName.RegistryReadStringValue}"",
{ParamName.RegistryBaseKey}: ""{RegistryBaseKey.CurrentUser}"",
{ParamName.RegistryKey}: ""Key"",
{ParamName.RegistryValueName}: ""ValueName"",
{ParamName.RegistryDefaultValue}: ""Value"",
}}";
ServiceCommand.TryDeserializeFromJsonString(
jsonString,
out IServiceCommand command,
out IServiceCommandResponse errorResponse)
.Should()
.BeTrue();
command.Should().BeOfType <RegistryReadStringValueCommand>();
errorResponse.Should().BeNull();
var typedCommand = (RegistryReadStringValueCommand)command;
typedCommand.BaseKey.Should().Be(RegistryBaseKey.CurrentUser);
typedCommand.Key.Should().Be("Key");
typedCommand.ValueName.Should().Be("ValueName");
typedCommand.DefaultValue.Should().Be("Value");
}
public void TryDeserializeFromJsonString_should_return_an_error_on_invalid_JSON()
{
ServiceCommand.TryDeserializeFromJsonString(
"invalid",
out IServiceCommand command,
out IServiceCommandResponse errorResponse)
.Should()
.BeFalse();
command.Should().BeNull();
errorResponse.Should().NotBeNull();
}
public void TryDeserializeFromJsonString_should_throw_on_null_params()
{
Action action = () => ServiceCommand.TryDeserializeFromJsonString(null, out _, out _);
action.Should().ThrowExactly <ArgumentNullException>().And.ParamName.Should().Be("jsonString");
}
