public void Command_GivenACommand_ReturnedFailedResult()
{
var c = new Command.Command();
var result = c.DoCommand(new[] { "Explore here" });
Assert.IsFalse(result.Successful);
}
public void SetOrder(Command command)
{
if (command.ToString() == "Command.BakeChickenWingCommand")
{
Console.WriteLine("服务员：鸡翅没有了，请点别的烧烤。");
}
else
{
orders.Add(command);
Console.WriteLine("增加订单：{0} 时间：{1}", command, DateTime.Now.ToString());
}
}
public RemoteControl()
{
this.onCommands = new Command[7];
this.offCommands = new Command[7];
Command noCommand = new NoCommand();
for (int i = 0; i < 7; i++)
{
this.onCommands[i] = noCommand;
this.offCommands[i] = noCommand;
}
this.undoCommand = new NoCommand();
}
/// <summary>
/// Registers the specified Command instance.
/// </summary>
public void Add(Command cmd)
{
if(_commands.ContainsKey(cmd.Name)) {
throw new ArgumentException(string.Format("A command has already been " +
"registered with the name {0} (in class {1})", cmd.Name, cmd.Type));
}
_commands.Add(cmd.Name, cmd);
if(cmd.Alias != null) {
if(!_commands.ContainsKey(cmd.Alias)) {
_commands.Add(cmd.Alias, cmd);
}
else {
_log.WarnFormat("Attempt to register command {0} under alias {1} failed; " +
"alias is already registered", cmd.Name, cmd.Alias);
}
}
}
public void TryToWithdrawMoreThanBalance_ShouldFail()
{
var account = new Account();
var command = new Command.Command {
Amount = 100, TheAction = Action.Deposit
};
account.Process(command);
command = new Command.Command {
Amount = 150, TheAction = Action.Withdraw
};
account.Process(command);
Assert.That(account.Balance, Is.EqualTo(100));
Assert.IsFalse(command.Success);
}
/// <summary>
/// Validates the first positional parameter, verifying it is either
/// the path to a command file, or one of the registered commands.
/// If it is a command, we dynamically update our command-line definition
/// to include any additional parameters needed by the specified command.
/// </summary>
protected bool ValidateCommand(Argument arg, string argVal, out string errorMsg)
{
bool ok;
errorMsg = String.Format("Command file '{0}' not found", argVal);
if (_commands.Contains(argVal))
{
ok = true;
// Mark the argument as a command
((PositionalArgument)arg).IsCommand = true;
// Add command arguments as keyword args
Command.Command cmd = _commands[argVal];
// First, add any args for commands that must be invoked before the
// requested command, such as SetLogonInfo, OpenApplication, etc
foreach (var i in _context.FindPathToType(cmd.Type, cmd))
{
if (i.IsCommand)
{
AddCommandParamsAsArgs(i.Command);
}
}
// Now add arguments for the command requested
AddCommandParamsAsArgs(cmd);
}
else
{
ok = File.Exists(argVal);
if (ok)
{
var logArg = _cmdLine.AddPositionalArgument("LogFile", "Path to log file",
(_, logFile) => Log(null, logFile));
logArg.IsRequired = false;
// Instruct parser to include unrecognised args, since these
// will be treated as variable assignments
_cmdLine.Definition.IncludeUnrecognisedKeywordArgs = true;
_cmdLine.Definition.IncludeUnrecognisedFlagArgs = true;
}
}
return(ok);
}
private static Command.Command GetAckCommand(
Command.Command command,
byte?target = null,
long?id = null,
Operation?operation = null,
int?pin = null,
int?value = null
)
{
var ackCommand = new Command.Command
{
Id = id ?? command.Id,
Operation = operation ?? command.Operation,
Pin = pin ?? command.Pin,
Value = value ?? -1,
Target = target ?? command.Target
};
return(ackCommand);
}
/// Add additional arguments needed by the command
protected void AddCommandParamsAsArgs(Command.Command cmd)
{
_log.TraceFormat("Adding command-line args for {0} command", cmd.Name);
foreach (var param in cmd.Parameters)
{
_log.DebugFormat("Processing param {0}", param);
if (param.IsSettingsCollection)
{
_log.DebugFormat("Processing collection type {0}", param.ParameterType);
// Get individual settings from collection and add them
foreach (var setting in _commands.GetSettings(param.ParameterType))
{
AddSettingAsArg(setting);
}
}
else if (param.HasParameterAttribute)
{
AddSettingAsArg(param);
}
}
}
public void DepositAndWithdraw()
{
var account = new Account();
var command = new Command.Command {
Amount = 100, TheAction = Action.Deposit
};
account.Process(command);
Assert.That(account.Balance, Is.EqualTo(100));
Assert.IsTrue(command.Success);
command = new Command.Command {
Amount = 50, TheAction = Action.Withdraw
};
account.Process(command);
Assert.That(account.Balance, Is.EqualTo(50));
Assert.IsTrue(command.Success);
}
static void Main(string[] args)
{
// creates a queue of commands and executes it when you deem appropriate
// example: ICommand, undo/redo functionality. for each action, an inverse action
// is a pushed onto a stack and popped when the appropriate button is clicked
// CQRS uses the command pattern
// https://en.wikipedia.org/wiki/Command_pattern
var command = new Command();
//command.CanExecuteChanged += (sender, eventArgs) => Console.WriteLine("Action added.");
command.Add(() => Console.WriteLine("I'm creating an action."));
command.Add(() => Console.WriteLine("But it's not getting executed just yet."));
command.Add(() => Console.WriteLine("For that I need to process the queue."));
command.Add(() => Console.WriteLine("Voila, done!"));
Console.WriteLine("Executing commands sequentially:");
command.Execute(true);
Console.WriteLine();
Console.WriteLine("Executing commands in parallell:");
command.Execute(false);
Console.ReadLine();
}
private static void BeginSend(this AckState ackState)
{
ackState.TryAndLog(
ack =>
{
AckQueueDictionary.AddOrUpdate(
ack.RemoteEndPoint,
key => ack.Queue,
(key, current) =>
{
current.CompleteAdding();
return(ack.Queue);
}
);
while (!ack.Queue.IsCompleted)
{
var command = ack.Queue.Take();
Command.Command ackCommand;
try
{
switch (command.Operation)
{
case Operation.Connect:
ackCommand = GetAckCommand(
command,
value: 1
);
break;
case Operation.WiringPiSetupPiFace:
ackCommand = GetAckCommand(
command,
value: PiFace.WiringPiSetupPiFace()
);
break;
case Operation.PullUpDnControl:
ackCommand = GetAckCommand(
command,
value: PiFace.PullUpDnControl(command.Pin, command.Value)
);
break;
case Operation.DigitalWrite:
ackCommand = GetAckCommand(
command,
value: PiFace.DigitalWrite(command.Pin, command.Value)
);
break;
case Operation.DigitalRead:
ackCommand = GetAckCommand(
command,
value: PiFace.DigitalRead(command.Pin)
);
break;
case Operation.MonitorInput:
var monitor = MonitorInputDictionary.AddOrUpdate(
ackState.RemoteEndPoint,
key =>
{
var value = new Command.Command[8];
value[command.Pin] = command;
return(value);
},
(key, value) =>
{
value[command.Pin] = command;
return(value);
}
);
var result = monitor[command.Pin];
ackCommand = GetAckCommand(
command,
value: (result.Id == command.Id && command.Value == result.Value)
? 1
: 0
);
if (PiFace.InputChanged == null)
{
PiFace.InputChanged = MonitorInputChanged;
}
break;
case Operation.MonitorInputChanged:
ackCommand = command;
break;
// ReSharper disable RedundantCaseLabel
case Operation.None:
default:
// ReSharper restore RedundantCaseLabel
ackCommand = GetAckCommand(
command,
operation: Operation.None,
value: PiFace.DigitalRead(command.Pin)
);
break;
}
}
catch (Exception ex)
{
ex.LogException();
ackCommand = GetAckCommand(
command,
value: -1
);
}
var ackCommandBytes = ackCommand.ToArray();
Log.Info(
"Sending {0} bytes from {1} connected to {2}",
ackCommandBytes.Length,
ack.Handler.LocalEndPoint,
ack.Handler.RemoteEndPoint
);
ackState.Handler.BeginSend(
ackCommandBytes,
0,
ackCommandBytes.Length,
0,
ackState.SendCallback,
null
);
}
}
);
}
public void SetSave(Command Guardado)
{
this.Guardo = Guardado;
}
internal Invoker(Command cmd)
{
this.cmd = cmd;
}
public void OffButtonWasPushed(int slot)
{
this.offCommands[slot].Execute();
this.undoCommand = offCommands[slot];
}
public void CancelOrder(Command command)
{
_commands.Remove(command);
Console.WriteLine("取消订单:{0},时间:{1}", command.ToString(), DateTime.Now.ToString());
}
/// Invoke an instance of the supplied Command object, using the supplied
/// arguments dictionary to obtain parameter values. An instance of the
/// host object must already be available in the context.
private object InvokeCommand(Command cmd, Dictionary<string, object> args)
{
if(!HasObject(cmd.Type)) {
throw new ContextException(String.Format("No object of type {0} " +
"is available in the current context", cmd.Type));
}
string paramLog;
object[] parms = null;
try {
parms = PrepareCommandArguments(cmd, args, out paramLog);
}
catch(Exception ex) {
throw new CommandException("An error occurred while preparing arguments for command {0}", cmd.Name, ex);
}
if(paramLog.Length > 0) {
_log.InfoFormat("Executing {0} command {1}:{2}", cmd.Type.Name, cmd.Name, paramLog);
}
else {
_log.InfoFormat("Executing {0} command {1}...", cmd.Type.Name, cmd.Name);
}
// Execute the method corresponding to this command
var ctxt = this[cmd.Type];
object result;
try {
result = cmd.MethodInfo.Invoke(ctxt, parms);
}
catch(TargetInvocationException ex) {
throw new CommandException("Command {0} threw an exception:", cmd.Name,
ex.InnerException != null ? ex.InnerException : ex);
}
// If the method is a factory method, set the returned object in the context
if(result != null && cmd.IsFactory) {
Set(result);
}
return result;
}
public void SetCommand(int i, Command onCommand, Command offCommand)
{
onCommands.Insert(i, onCommand);
offCommands.Insert(i, offCommand);
}
public void SetCommand(Command command)
{
this._command = command;
}
/// <summary>
/// Registers commands and factories from the supplied class.
/// Commands must be tagged with the attribute Command to be locatable.
/// </summary>
public void RegisterClass(Type t)
{
Factory factory;
Command cmd;
if(t.IsClass) {
// Process class level attributes
List<SettingAttribute> settings = new List<SettingAttribute>();
foreach(var attr in t.GetCustomAttributes(typeof(SettingAttribute), false)) {
if(attr is DynamicSettingAttribute) {
// Verify that DynamicSettingAttributes are only used on IDynamicSettingsCollection
if(t.GetInterface("IDynamicSettingsCollection") == null) {
throw new ArgumentException(string.Format("A DynamicSettingAttribute has " +
"been defined on class {0}, but this class does not implement " +
"the IDynamicSettingsCollection interface", t.Name));
}
}
settings.Add((SettingAttribute)attr);
}
// Attributes are returned in random order, so sort by preferred order
settings.Sort((a, b) => (a.SortKey).CompareTo(b.SortKey));
_settings[t] = settings;
// Process members of class
foreach(var mi in t.GetMembers(BindingFlags.Public|BindingFlags.Instance|BindingFlags.DeclaredOnly)) {
cmd = null;
factory = null;
foreach(var attr in mi.GetCustomAttributes(false)) {
if(attr is CommandAttribute) {
cmd = new Command(t, mi as MethodInfo, attr as CommandAttribute);
Add(cmd);
}
if(attr is FactoryAttribute) {
factory = new Factory(mi, attr as FactoryAttribute);
Add(factory);
}
}
if(cmd != null && factory != null) {
cmd._factory = factory;
factory._command = cmd;
}
}
}
}
public void CancelOrder(Command command)
{
orders.Remove(command);
Console.WriteLine("取消订单：{0} 时间：{1}", command, DateTime.Now.ToString(CultureInfo.InvariantCulture));
}
public void OnButtonWasPressed(int i)
{
onCommands[i].Execute();
undoCommand = offCommands[i];
}
public void SetCommand(Command command)
{
_command = command;
}
/// <summary>
/// Determines the sequence of command invocations, property accesses,
/// and constructor calls that are required to instantiate an object of
/// the requested type, given the current state of the context.
/// </summary>
/// <returns>A Stack containing the methods/properties/ctors to be invoked
/// to create an instance of the desire type. The stack may be empty if an
/// object of the desired type is already available.
/// </returns>
/// <exception>Throws ContextException if an object of the desired type
/// cannot be created from the current context.
/// </exception>
public Stack<Factory> FindPathToType(Type t, Command cmd)
{
var steps = new Stack<Factory>();
_log.TraceFormat("Determining steps needed to create an instance of {0}", t);
// Create a lambda for recursion
Action<Type> scan = null;
scan = type => {
if(!HasObject(type)) {
// See if we can get an instance from what we do have
if(_registry.Contains(type)) {
Factory factory = _registry.GetFactory(type);
_log.DebugFormat("Found {0} on {1}", factory, factory.DeclaringType);
steps.Push(factory);
if(factory.IsConstructor) {
// Determine steps needed to obtain instances of
// constructor arguments (if any)
foreach(var param in factory.Constructor.GetParameters()) {
scan(param.ParameterType);
}
}
else {
// Determine how to obtain an instance of the item
// holding the factory method/property
scan(factory.DeclaringType);
}
}
else {
throw new ContextException(string.Format("No method, property, or constructor " +
"is registered as a Factory for {0} objects, which are required by " +
"{1}", type, cmd.Name));
}
}
};
scan(t);
return steps;
}
private ISettingsCollection PrepareSettingsCollectionArg(Command cmd, CommandParameter param,
Dictionary<string, object> args, StringBuilder sb)
{
// Attempt to create an instance of the collection class if necessary
if(!HasObject(param.ParameterType)) {
foreach(var step in FindPathToType(param.ParameterType, cmd)) {
Instantiate(step, args);
}
}
// Set each setting that has a value in the supplied args
var coll = this[param.ParameterType] as ISettingsCollection;
foreach(var setting in GetSettings(param.ParameterType)) {
if(setting is DynamicSettingAttribute) {
_log.Trace("Retrieving dynamic setting argument names");
foreach(var dynset in ((IDynamicSettingsCollection)coll).DynamicSettingNames) {
if(args.ContainsKey(dynset)) {
_log.DebugFormat("Processing dynamic setting {0}", dynset);
coll[dynset] = ConvertSetting(args[dynset], setting);
LogSettingNameValue(sb, dynset, coll[dynset]);
}
}
}
else if(args.ContainsKey(setting.Name)) {
coll[setting.InternalName] = ConvertSetting(args[setting.Name], setting);
LogSettingValue(sb, setting, coll[setting.InternalName]);
}
else if(setting.HasAlias && args.ContainsKey(setting.Alias)) {
coll[setting.InternalName] = ConvertSetting(args[setting.Alias], setting);
LogSettingValue(sb, setting, coll[setting.InternalName]);
}
}
return coll;
}
/// Prepares the parameters to be passed to a command.
private object[] PrepareCommandArguments(Command cmd, Dictionary<string, object> args, out string paramLog)
{
// Create an array of parameters in the order expected
var parms = new object[cmd.Parameters.Count];
var sb = new StringBuilder();
var i = 0;
foreach(var param in cmd.Parameters) {
_log.TraceFormat("Processing parameter {0}", param.Name);
if(args.ContainsKey(param.Name)) {
parms[i] = ConvertSetting(args[param.Name], param);
LogSettingValue(sb, param, parms[i]);
}
else if(param.HasAlias && args.ContainsKey(param.Alias)) {
parms[i] = ConvertSetting(args[param.Alias], param);
LogSettingValue(sb, param, parms[i]);
}
else if(param.IsSettingsCollection) {
parms[i] = PrepareSettingsCollectionArg(cmd, param, args, sb);
}
else if(param.HasDefaultValue) {
// Deal with missing arg values, default values, etc
_log.DebugFormat("No value supplied for {0}; using default value '{1}'",
param.Name, param.DefaultValue);
parms[i] = param.DefaultValue;
LogSettingValue(sb, param, parms[i]);
}
else if(HasObject(param.ParameterType)) {
parms[i] = this[param.ParameterType];
if(param.HasParameterAttribute) {
LogSettingValue(sb, param, parms[i]);
}
}
// If there is a factory to create this type, then try to create it
else if(_registry.Contains(param.ParameterType)) {
foreach(var step in FindPathToType(param.ParameterType, cmd)) {
Instantiate(step, args);
}
parms[i] = this[param.ParameterType];
if(param.HasParameterAttribute) {
LogSettingValue(sb, param, parms[i]);
}
}
else if(MissingArgHandler != null) {
object val = MissingArgHandler(param);
if(val != null) {
parms[i] = ConvertSetting(val, param);
LogSettingValue(sb, param, parms[i]);
}
else {
throw new ArgumentException(
String.Format("No value was specified for the required argument '{0}' to command '{1}'",
param.Name, cmd.Name));
}
}
else {
throw new ArgumentException(
String.Format("No value was specified for the required argument '{0}' to command '{1}'",
param.Name, cmd.Name));
}
i++;
}
paramLog = sb.ToString();
return parms;
}
public void AddCommand(Command command)
{
commands.Add(command);
}
/// <summary>
/// Checks if the supplied Dictionary contains all the required arguments
/// to invoke the specified command.
/// </summary>
public static bool ContainsRequiredValuesForCommand(this Dictionary<string, object> args, Command cmd)
{
foreach(var param in cmd.Parameters) {
if(!args.ContainsValueForSetting(param)) {
return false;
}
}
return true;
}
public void SetCommand(int slot,Command onCommand,Command offCommand)
{
this.onCommands[slot] = onCommand;
this.offCommands[slot] = offCommand;
}