An Era of Darkness: The British Empire in India pdf
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An Era of Darkness: The British Empire in India bookQ:
Is it Possible to run the following using Pipelines on WF 4.0
I have WF 4.0 and my task is to invoke a C# code which in turn invokes some external command line executable and does some validation based on the input that comes in.
I am new to the Pipeline concept. Please let me know if my understanding is correct.
Is it possible to do the following using a combination of C#, external command line executable and MSBuild.
Create the Executable (Using MSBuild)
Validate the Input
Create a Pipeline (Using MSBuild)
If the validation is successful then create an SSIS package for it.
If the validation fails then error and stop the pipeline
A:
First of all, the docs you referenced are for WF 3.5 or older, they're referring to the Code Activity. The newer version is called Code Activity (v2.0)
See MSDN - Executing the New Code Activity
If you want to execute external commands, you need to use the Shell task.
If your validation is only about a few parameters, you could create an object containing these parameters and write a simple function to evaluate that object, i.e. something like:
static bool IsValid(object obj)
{
if (obj == null)
return false;
var pattern = new Regex(@"^[A-Z]{2}$");
if (!pattern.IsMatch(obj.ToString()))
return false;
return true;
}
Then you can call this function from within your workflow:
The Pipeline will be triggered by a triggered activity called ValidateValue and will be associated with the Execute Shell Task.
The Inputs of the task are determined by:
The ExecutionData[0]
Which will be the object you pass to IsValid.
Q:
Handling transient invalid arguments during a constructor call
I'm reading Stephen Toub's blog post, Call Types for Fun and Profit, where he talks about a (simplified) implementation of the Action 01e38acffe
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One of the great American catastrophes of the 20th century was the Allied invasion of Sicily, July 10 to August 17, 1943. The first Allied step-by-step landing at Gela on July 10-11 was a disaster, and the forces that launched the invasions on July 10 were beaten back to the beaches that day by a Nazi counterattack. The Allies were effectively strung out from shore to shore through the southern half of the island and were surrounded, encircled, and cut off.
Although Allied generals and military planners had not fully appreciated the difficulty of beach landings against large numbers of well-prepared, well-equipped, and disciplined enemy troops, General Alexander did not let the situation go. On the night of July 15-16, he landed his forces along the southeast coast of the island, right at the enemy’s rear. He continued to build up forces on the beaches, despite the risk of being cut off. His troops were pinned down on the beaches, and only a few could be safely brought back to the landing boats.
At 4:00 p.m. on July 16, Admiral Cunningham and General Smith, the overall Allied commander, decided to order their forces to withdraw. According to American historian Stephen E. Ambrose, the decision was made “in the face of obvious risk and peril” because the Allies were out of supply and in danger of being cut off, cut up, and annihilated.
What happened next was a political and psychological disaster. Gen. Mark Clark, who had commanded the U.S. Fifth Army in Italy, was in the area. He knew that the invasion had failed. It was easy for him to take the blame and to make the political and military judgment that the failure was his. He set off for England and continued on to Washington, D.C., telling President Roosevelt and the Joint Chiefs that the Allies had been soundly defeated.
Clark’s prestige was at an all-time low, and the American people and their political leaders assumed that the prime
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