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using System;
using System.Collections.Generic;
using System.Net;
using System.Net.NetworkInformation;
using System.Text;
using Kaleida.ServiceMonitor.Framework;
using Kaleida.ServiceMonitor.Framework.Responses;
namespace Kaleida.ServiceMonitor.Operations.PreparedRequests
{
public class Ping : PreparedRequest
{
private const string Data = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
private TimeSpan timeout;
private readonly string hostNameOrAddress;
public Ping(string hostNameOrAddress) : this(hostNameOrAddress, "50s")
{
}
public Ping(string hostNameOrAddress, string timeout)
{
var timeoutTimeSpan = timeout.ToTimeSpan();
if (timeoutTimeSpan.TotalMilliseconds < 1)
throw new ArgumentOutOfRangeException("timeout", timeout, "Cannot be less than 1 millisecond");
this.hostNameOrAddress = hostNameOrAddress;
this.timeout = timeoutTimeSpan;
}
public override string Description
{
get { return string.Format("Determine if '{0}' is available using an ICMP request with a timeout of {1}ms", hostNameOrAddress, timeout.TotalMilliseconds); }
}
public override object GetResponse()
{
var pinger = new System.Net.NetworkInformation.Ping();
byte[] buffer = Encoding.ASCII.GetBytes(Data);
PingReply reply = pinger.Send(hostNameOrAddress, (int) timeout.TotalMilliseconds, buffer);
if (reply == null)
throw new InvalidOperationException("Ping reply was null");
switch (reply.Status)
{
case IPStatus.Success:
return new PingResponse(reply.Status, TimeSpan.FromMilliseconds(reply.RoundtripTime));
case IPStatus.TimedOut:
return new PingResponse(new PingTimedOutException(string.Format("Ping to {0} timed out", hostNameOrAddress)));
default:
return new PingResponse(new InvalidOperationException(string.Format("Ping to {0} returned {1}", hostNameOrAddress, reply.Status)));
}
}
}
}
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Stuart Wheelwright is the Principal Architect and Software Developer at
BlackJet Software Ltd.
He has over 16 years commercial experience producing robust, maintainable, web-based solutions and bespoke systems for Microsoft platforms.
His latest project is
Shopping UK, an elegantly simple shopping list for iPhone.