Browse IBM MQ whitout get the messages - ibm-mq

Question

Hi I'm new on IBM MQ environment so I need your help....
I need to develope a script that check an IBMMQ (outside my factory) queue to verify if there are messages waiting to be get from my application-server (I mean if my apllication-server lost the connection to IBMMQ for any reason, I want to be informed, in this mode I can take the correction).
If is possible I need the script in PowereShell or C#.
Thanks a lot.

Answer 1

There is sample code that can get you started - https://github.com/ibm-messaging/mq-dev-patterns/blob/master/dotnet/dotNetGet.cs
replace the CreateConsumer method invocation with CreateBrowser
ie. the modified snippet becomes
private void ReceiveMessagesFromEndpoint(IConnectionFactory cf)
{
IConnection connectionWMQ;
ISession sessionWMQ;
IDestination destination;
IMessageBrowser browser;
ITextMessage textMessage;
// Create connection.
connectionWMQ = cf.CreateConnection();
Console.WriteLine("Connection created");
// Create session
sessionWMQ = connectionWMQ.CreateSession(false, AcknowledgeMode.AutoAcknowledge);
Console.WriteLine("Session created");
// Create destination
destination = sessionWMQ.CreateQueue(env.Conn.queue_name);
Console.WriteLine("Destination created");
// Create browser
browser = sessionWMQ.CreateBrowser(destination);
Console.WriteLine("Browser created");
...
Instructions on setup are available in the associated readme - https://github.com/ibm-messaging/mq-dev-patterns/blob/master/dotnet/README.md

Answer 2

Do not browse the queue to get the current queue depth as it will cause an excessive amount of network traffic and is totally unnecessary.
Here is a C#/.NET/MQ sample program (fully functional) that will inquire on the queue for its current depth.
using System;
using System.Collections;
using System.Collections.Generic;
using System.Configuration;
using System.Text;
using IBM.WMQ;
/// <summary> Program Name
/// MQTest75
///
/// Description
/// This C# class will connect to a remote queue manager
/// and inquire on the current depth of the queue using a managed .NET environment.
///
/// </summary>
/// <author> Roger Lacroix
/// </author>
namespace MQTest75
{
class MQTest75
{
private Hashtable qMgrProp = null;
private System.String qManager;
private System.String inputQName;
/*
* The constructor
*/
public MQTest75()
: base()
{
}
/// <summary> Make sure the required parameters are present.</summary>
/// <returns> true/false
/// </returns>
private bool allParamsPresent()
{
bool b = false;
if ( (ConfigurationManager.AppSettings["ConnectionName"] != null) &&
(ConfigurationManager.AppSettings["Port"] != null) &&
(ConfigurationManager.AppSettings["ChannelName"] != null) &&
(ConfigurationManager.AppSettings["QMgrName"] != null) &&
(ConfigurationManager.AppSettings["QueueName"] != null) )
{
try
{
System.Int32.Parse(ConfigurationManager.AppSettings["Port"]);
b = true;
}
catch (System.FormatException e)
{
b = false;
}
}
return b;
}
/// <summary> Extract the configuration applicaiton settings and initialize the MQ variables.</summary>
/// <param name="args">
/// </param>
/// <throws> IllegalArgumentException </throws>
private void init(System.String[] args)
{
if (allParamsPresent())
{
qManager = ConfigurationManager.AppSettings["QMgrName"];
inputQName = ConfigurationManager.AppSettings["QueueName"];
qMgrProp = new Hashtable();
qMgrProp.Add(MQC.TRANSPORT_PROPERTY, MQC.TRANSPORT_MQSERIES_MANAGED);
qMgrProp.Add(MQC.HOST_NAME_PROPERTY, ConfigurationManager.AppSettings["ConnectionName"]);
qMgrProp.Add(MQC.CHANNEL_PROPERTY, ConfigurationManager.AppSettings["ChannelName"]);
try
{
qMgrProp.Add(MQC.PORT_PROPERTY, System.Int32.Parse(ConfigurationManager.AppSettings["Port"]));
}
catch (System.FormatException e)
{
qMgrProp.Add(MQC.PORT_PROPERTY, 1414);
}
if (ConfigurationManager.AppSettings["UserId"] != null)
qMgrProp.Add(MQC.USER_ID_PROPERTY, ConfigurationManager.AppSettings["UserId"]);
if (ConfigurationManager.AppSettings["Password"] != null)
qMgrProp.Add(MQC.PASSWORD_PROPERTY, ConfigurationManager.AppSettings["Password"]);
logger("Parameters:");
logger(" QMgrName ='" + qManager + "'");
logger(" Queue Name ='" + inputQName + "'");
logger("Connection values:");
foreach (DictionaryEntry de in qMgrProp)
{
logger(" " + de.Key + " = '" + de.Value + "'");
}
}
else
{
throw new System.ArgumentException();
}
}
/// <summary> Connect, open queue, output the current queue depth, close queue and disconnect.</summary>
/// <throws> MQException </throws>
private void handleIt()
{
MQQueueManager qMgr = null;
MQQueue inQ = null;
int openOptions = MQC.MQOO_INQUIRE + MQC.MQOO_FAIL_IF_QUIESCING;
try
{
qMgr = new MQQueueManager(qManager, qMgrProp);
logger("Successfully connected to " + qManager);
inQ = qMgr.AccessQueue(inputQName, openOptions);
logger("Successfully opened " + inputQName);
logger("Current queue depth is " + inQ.CurrentDepth);
}
catch (MQException mqex)
{
logger("CC=" + mqex.CompletionCode + " : RC=" + mqex.ReasonCode);
}
catch (System.IO.IOException ioex)
{
logger("Error: ioex=" + ioex);
}
finally
{
try
{
if (inQ != null)
{
inQ.Close();
logger("Closed: " + inputQName);
}
}
catch (MQException mqex)
{
logger("CC=" + mqex.CompletionCode + " : RC=" + mqex.ReasonCode);
}
try
{
if (qMgr != null)
{
qMgr.Disconnect();
logger("Disconnected from " + qManager);
}
}
catch (MQException mqex)
{
logger("CC=" + mqex.CompletionCode + " : RC=" + mqex.ReasonCode);
}
}
}
/// <summary> Output the log message to stdio.</summary>
/// <param name="data">
/// </param>
private void logger(String data)
{
DateTime myDateTime = DateTime.Now;
System.Console.Out.WriteLine(myDateTime.ToString("yyyy/MM/dd HH:mm:ss.fff") + " " + this.GetType().Name + ": " + data);
}
/// <summary> main line</summary>
/// <param name="args">
/// </param>
// [STAThread]
public static void Main(System.String[] args)
{
MQTest75 mqt = new MQTest75();
try
{
mqt.init(args);
mqt.handleIt();
}
catch (System.ArgumentException e)
{
System.Console.Out.WriteLine("Check your configuration file for an incorrect parameter.");
System.Environment.Exit(1);
}
catch (MQException e)
{
System.Console.Out.WriteLine(e);
System.Environment.Exit(1);
}
System.Environment.Exit(0);
}
}
}
Just create a configuration called MQTest75.exe.config and put the following in it:
<configuration>
<appSettings>
<add key="QMgrName" value="MQA1"/>
<add key="ConnectionName" value="10.10.10.10"/>
<add key="Port" value="1414"/>
<add key="ChannelName" value="TEST.CHL"/>
<add key="QueueName" value="TEST.Q1"/>
<add key="UserId" value="tester"/>
<add key="Password" value="mypwd"/>
</appSettings>
</configuration>