private void InvokeChannelActionInternal(Action <IModel> channelAction, DateTime startTime)
{
if (IsTimedOut(startTime))
{
logger.ErrorWrite("Channel action timed out. Throwing exception to client.");
throw new TimeoutException("The operation requested on PersistentChannel timed out.");
}
try
{
channelAction(Channel);
}
catch (OperationInterruptedException exception)
{
try
{
var amqpException = AmqpExceptionGrammar.ParseExceptionString(exception.Message);
if (amqpException.Code == AmqpException.ConnectionClosed)
{
OnConnectionDisconnected(null);
WaitForReconnectionOrTimeout(startTime);
InvokeChannelActionInternal(channelAction, startTime);
}
else
{
throw;
}
}
catch (Sprache.ParseException)
{
throw exception;
}
}
}
public void Should_fail_on_badly_formatted_exception()
{
Assert.Throws <Sprache.ParseException>(() => {
const string originalException = "Do be do od be do do = something else, that I don't know=hello";
AmqpExceptionGrammar.ParseExceptionString(originalException);
});
}
private static bool NeedRethrow(OperationInterruptedException exception)
{
try
{
var amqpException = AmqpExceptionGrammar.ParseExceptionString(exception.Message);
return(amqpException.Code != AmqpException.ConnectionClosed);
}
catch (ParseException)
{
return(true);
}
}
public void Should_parse_first_Amqp_exception_example()
{
const string originalException =
"The AMQP operation was interrupted: AMQP close-reason, initiated by Peer, code=320, " +
"text=\"CONNECTION_FORCED - Closed via management plugin\", classId=0, methodId=0, cause=";
var amqpException = AmqpExceptionGrammar.ParseExceptionString(originalException);
amqpException.Preface.Text.ShouldEqual("The AMQP operation was interrupted");
amqpException.Code.ShouldEqual(320);
amqpException.MethodId.ShouldEqual(0);
amqpException.ClassId.ShouldEqual(0);
}
public void Should_parse_second_Amqp_exception_example()
{
const string originalException =
"The AMQP operation was interrupted: AMQP close-reason, initiated by Peer, code=406, " +
"text=\"PRECONDITION_FAILED - cannot redeclare exchange 'myExchange' in vhost '/' " +
"with different type, durable, internal or autodelete value\", classId=40, methodId=10, cause=";
var amqpException = AmqpExceptionGrammar.ParseExceptionString(originalException);
amqpException.Preface.Text.ShouldEqual("The AMQP operation was interrupted");
amqpException.Code.ShouldEqual(406);
amqpException.MethodId.ShouldEqual(10);
amqpException.ClassId.ShouldEqual(40);
}
private void InvokeChannelActionInternal(Action <IModel> channelAction, DateTime startTime)
{
if (this.IsTimedOut(startTime))
{
ConsoleLogger.ErrorWrite("Channel action timed out. Throwing exception to client.");
throw new TimeoutException("The operation requested on PersistentChannel timed out.");
}
try
{
channelAction(this.Channel);//执行这个方法，ClientCommandDispatcherSingleton类的Invoke<T>方法中定义的cs.SetResult(channelAction(channel));话会被执行。
}
catch (OperationInterruptedException exception)
{
try
{
AmqpException amqpException = AmqpExceptionGrammar.ParseExceptionString(exception.Message);//将AMQP错误信息，转成C#定义的异常类型
if (amqpException.Code == AmqpException.ConnectionClosed)
{
this.OnConnectionDisconnected(null);
this.WaitForReconnectionOrTimeout(startTime);
this.InvokeChannelActionInternal(channelAction, startTime);
}
else
{
this.OpenChannel();
throw;
}
}
catch (Sprache.ParseException)
{
throw exception;
}
}
catch (Exception)
{
this.OnConnectionDisconnected(null);
this.WaitForReconnectionOrTimeout(startTime);
this.InvokeChannelActionInternal(channelAction, startTime);
}
}
