public ServiceMessage ExecuteMessage(ServiceMessage message)
{
ServiceMessage result = null;
if (this.Service != null) {
var polled = this.Service.ExecuteMessage(message);
// Clone the message so we have no proxy to the other side.
result = new ServiceMessage() {
Name = polled.Name,
Arguments = polled.Arguments,
Stamp = polled.Stamp
};
}
return result;
}
/// <summary>
/// Executes very simple commands originating from the service controller from a local origin.
/// </summary>
public ServiceMessage ExecuteMessage(ServiceMessage message) {
// A request from the service controller to run a command locally.
ICommandResult result = this.Tunnel(new Command() {
Name = message.Name,
Origin = CommandOrigin.Local,
// This is possible because of the SortedDictionary used in Potato.Service.Shared.ArgumentsHelper
// This method will always assume that Arguments.Values will result in the order of execution.
Parameters = message.Arguments.Values.Select(value => new CommandParameter() {
Data = {
Content = new List<String>() {
value
}
}
}).Cast<ICommandParameter>().ToList()
});
// Format and return the service message.
return new ServiceMessage() {
Name = "result",
Arguments = new Dictionary<string, string>() {
{ "Command", message.Name },
{ "Success", result.Success.ToString() },
{ "Status", result.CommandResultType.ToString() },
{ "Message", result.Message }
}
};
}
/// <summary>
/// Fires a message across the appdomain back to the instance controller, provided
/// a callback has been setup.
/// </summary>
/// <remarks>
/// If the main thread is tied up then "nop" won't be sent back and the service
/// will be shut down. We may expand on this in the future to check extra threads,
/// polling all the plugin appdomains and such.
/// </remarks>
public ServiceMessage PollService() {
ServiceMessage message = null;
if (this.ServiceMessage != null) {
message = this.ServiceMessage;
// clear it for the next poll.
this.ServiceMessage = null;
}
else {
message = new ServiceMessage() {
Name = "nop"
};
}
return message;
}
/// <summary>
/// Called when a message processing is completed.
/// </summary>
/// <param name="message">The message being processed</param>
/// <param name="seconds">The time in seconds it took to process the signal</param>
private void OnSignalEnd(ServiceMessage message, Double seconds)
{
var handler = this.SignalEnd;
if (handler != null) {
handler(this, message, seconds);
}
}
/// <summary>
/// Called before processing a signal begins
/// </summary>
/// <param name="message">The message being processed</param>
private void OnSignalBegin(ServiceMessage message)
{
var handler = this.SignalBegin;
if (handler != null) {
handler(this, message);
}
}
/// <summary>
/// Called when a result signal is processed
/// </summary>
/// <param name="message">The service message containing further details about the result</param>
private void OnResult(ServiceMessage message)
{
var handler = this.SignalResult;
if (handler != null) {
handler(this, message);
}
}
/// <summary>
/// Parse a basic message to the service controller
/// </summary>
/// <param name="message">The message to dispatch</param>
/// <returns>True if the message was processed correctly, false otherwise</returns>
public bool SignalMessage(ServiceMessage message)
{
bool processed = true;
if (message != null) {
// Record the current time for statistics output.
DateTime begin = DateTime.Now;
// Ignore "nop" messages
if (String.Compare(message.Name, "nop", StringComparison.OrdinalIgnoreCase) != 0) {
this.OnSignalBegin(message);
if (String.Compare(message.Name, "start", StringComparison.OrdinalIgnoreCase) == 0) {
this.Start();
}
else if (String.Compare(message.Name, "stop", StringComparison.OrdinalIgnoreCase) == 0) {
this.Stop();
}
else if (String.Compare(message.Name, "restart", StringComparison.OrdinalIgnoreCase) == 0) {
this.Restart();
}
else if (String.Compare(message.Name, "merge", StringComparison.OrdinalIgnoreCase) == 0) {
if (message.Arguments.ContainsKey("uri") == true && message.Arguments.ContainsKey("packageid") == true) {
this.MergePackage(message.Arguments["uri"], message.Arguments["packageid"]);
}
else {
this.OnSignalParameterError(new List<String>() {
"uri",
"packageId"
});
}
}
else if (String.Compare(message.Name, "uninstall", StringComparison.OrdinalIgnoreCase) == 0) {
if (message.Arguments.ContainsKey("packageid") == true) {
this.UninstallPackage(message.Arguments["packageid"]);
}
else {
this.OnSignalParameterError(new List<String>() {
"packageId"
});
}
}
else if (String.Compare(message.Name, "statistics", StringComparison.OrdinalIgnoreCase) == 0 || String.Compare(message.Name, "stats", StringComparison.OrdinalIgnoreCase) == 0) {
this.OnStatistics();
}
else if (String.Compare(message.Name, "help", StringComparison.OrdinalIgnoreCase) == 0) {
this.OnHelp();
}
else if (String.Compare(message.Name, "result", StringComparison.OrdinalIgnoreCase) == 0) {
this.OnResult(message);
}
else if (String.Compare(message.Name, "write", StringComparison.OrdinalIgnoreCase) == 0) {
this.WriteServiceConfig();
}
else {
processed = false;
}
this.OnSignalEnd(message, (DateTime.Now - begin).TotalMilliseconds / 1000);
}
// else do nothing for nop messages, the message was to do nothing.
message.Dispose();
}
else {
processed = false;
}
return processed;
}
/// <summary>
/// Runs a command on the instance, returning a signal message. The signal message is
/// processed the same as if it was found while polling the instance.
/// </summary>
/// <param name="message">The message to send to the instance.</param>
public void ExecuteMessage(ServiceMessage message)
{
this.Start();
if (this.Observer.Status == ServiceStatusType.Started) {
this.SignalMessage(this.ServiceLoaderProxy.ExecuteMessage(message));
}
}
public ServiceMessage PollService()
{
ServiceMessage message = null;
if (this.Service != null) {
var polled = this.Service.PollService();
// Clone the message so we have no proxy to the other side.
message = new ServiceMessage() {
Name = polled.Name,
Arguments = polled.Arguments,
Stamp = polled.Stamp
};
}
return message;
}