internal ServiceCommand(IJellyfishContext context, IClock clock, string commandGroup = null, string commandName = null, string threadPoolKey = null, CommandPropertiesBuilder properties = null, ICircuitBreaker circuitBreaker = null, CommandMetrics metrics = null, CommandExecutionHook executionHook = null)
{
Contract.Requires(context != null);
CommandState state = _states.GetOrAdd(this.GetType().FullName, (n) => ServiceCommandHelper.PrepareInternal(this.GetType(), context, commandGroup, commandName, properties, clock, metrics, circuitBreaker));
if (String.IsNullOrEmpty(state.CommandGroup))
{
throw new ArgumentException("commandGroup can not be null or empty.");
}
Logger = context.GetService <ILoggerFactory>()?.CreateLogger(this.GetType().FullName) ?? EmptyLogger.Instance;
CommandGroup = state.CommandGroup;
CommandName = state.CommandName;
_clock = clock ?? Clock.GetInstance(); // for test
Properties = properties?.Build(CommandName) ?? new CommandProperties(CommandName);
Metrics = metrics ?? CommandMetricsFactory.GetInstance(CommandName, CommandGroup, Properties, _clock);
_circuitBreaker = circuitBreaker ?? (Properties.CircuitBreakerEnabled.Value ? CircuitBreakerFactory.GetOrCreateInstance(CommandName, Properties, Metrics, _clock) : new NoOpCircuitBreaker());
context.MetricsPublisher.CreateOrRetrievePublisherForCommand(CommandGroup, Metrics, _circuitBreaker);
this._flags = state.Flags;
_threadPoolKey = threadPoolKey ?? CommandGroup;
_executionResult = new ExecutionResult();
_executionHook = executionHook ?? context.CommandExecutionHook;
var executionPolicy = Properties.ExecutionIsolationStrategy.Value;
if (executionPolicy == ExecutionIsolationStrategy.Semaphore)
{
_flags |= ServiceCommandOptions.SemaphoreExecutionStrategy;
}
if (executionPolicy == ExecutionIsolationStrategy.Thread)
{
_flags |= ServiceCommandOptions.ThreadExecutionStrategy;
}
if (Properties.RequestLogEnabled.Value)
{
_currentRequestLog = context.GetRequestLog();
}
if ((_flags & ServiceCommandOptions.HasCacheKey) == ServiceCommandOptions.HasCacheKey && Properties.RequestCacheEnabled.Value)
{
_requestCache = context.GetCache <CacheItem>(CommandName);
}
}
internal static CommandState PrepareInternal(Type commandType, IJellyfishContext context, string commandGroup, string commandName, CommandPropertiesBuilder propertiesBuilder=null, IClock clock = null, CommandMetrics metrics = null, ICircuitBreaker circuitBreaker = null)
{
var state = new CommandState();
state.CommandName = commandName ?? commandType.FullName;
state.CommandGroup = commandGroup ?? state.CommandName;
clock = clock ?? Clock.GetInstance();
var properties = propertiesBuilder?.Build( state.CommandName ) ?? new CommandProperties( state.CommandName );
metrics = metrics ?? CommandMetricsFactory.GetInstance( state.CommandName, state.CommandGroup, properties, clock );
circuitBreaker = circuitBreaker ?? ( properties.CircuitBreakerEnabled.Value ? CircuitBreakerFactory.GetOrCreateInstance( state.CommandName, properties, metrics, clock ) : new NoOpCircuitBreaker() );
context.MetricsPublisher.CreateOrRetrievePublisherForCommand( state.CommandGroup, metrics, circuitBreaker );
ServiceCommandOptions flags = ServiceCommandOptions.None;
if(IsMethodImplemented( commandType, "GetFallback" ))
flags |= ServiceCommandOptions.HasFallBack;
if(IsMethodImplemented( commandType, "GetCacheKey" ))
flags |= ServiceCommandOptions.HasCacheKey;
state.Flags = flags;
return state;
}