/**
* Waits for the specified instance to transition to the specified state,
* otherwise throws a RuntimeException if this method gives up on the
* instance ever transitioning to that state.
*
* @param instanceId
* The ID of the instance to wait for.
* @param state
* The expected state for the instance to transition to.
*
* @throws Exception
* If any problems were encountered while polling the instance's
* state, or if this method gives up on the instance ever
* transitioning to the expected state.
*/
public async Task waitForInstanceToTransitionToStateAsync(string instanceId, InstanceStateName state)
{
Console.WriteLine("Waiting for instance " + instanceId + " to transition to " + state + "...");
int count = 0;
while (true)
{
Thread.Sleep(1000 * 5);
count++;
Instance runningInstance = (await _ec2Client.DescribeInstancesAsync(
new DescribeInstancesRequest { InstanceIds = new List<string> { instanceId } }))
.Reservations[0].Instances[0];
if (runningInstance.State.Name == state) return;
if (count > 100)
{
throw new Exception("Instance " + instanceId + " never transitioned to " + state);
}
}
}
private static Instance GenerateInstance(string instanceId, InstanceStateName stateName)
{
return new Instance {InstanceId = instanceId, State = new InstanceState {Name = stateName}};
}
