public string WriteMsg(string strInputMsg)
{
string strReturn = "";
try
{
MQQueue queue = null;
MQQueueManager QueueManagerName = null ;
QueueManagerName = new MQQueueManager("GRBAAQM");
queue = QueueManagerName.AccessQueue(QueueName, MQC.MQOO_OUTPUT
+ MQC.MQOO_FAIL_IF_QUIESCING);
message = strInputMsg;
queueMessage = new MQMessage();
queueMessage.WriteString(message);
queueMessage.Format = MQC.MQFMT_STRING;
queuePutMessageOptions = new MQPutMessageOptions();
queue.Put(queueMessage, queuePutMessageOptions);
strReturn = "Message sent to the queue successfully";
}
catch (MQException MQexp)
{
strReturn = "Exception: " + MQexp.Message;
}
catch (Exception exp)
{
strReturn = "Exception: " + exp.Message;
}
return strReturn;
}
public string ReadMsg()
{
String strReturn = "";
try
{
MQQueue queue = null;
MQQueueManager QueueManagerName = null;
QueueManagerName = new MQQueueManager("GRBAAQM");
queue = QueueManagerName.AccessQueue(QueueName, MQC.MQOO_INPUT_AS_Q_DEF +
MQC.MQOO_FAIL_IF_QUIESCING);
queueMessage = new MQMessage();
queueMessage.Format = MQC.MQFMT_STRING;
queueGetMessageOptions = new MQGetMessageOptions();
queue.Get(queueMessage, queueGetMessageOptions);
strReturn =
queueMessage.ReadString(queueMessage.MessageLength);
}
catch (MQException MQexp)
{
strReturn = "Exception : " + MQexp.Message;
}
catch (Exception exp)
{
strReturn = "Exception: " + exp.Message;
}
return strReturn;
}
These two methods in this program helps us to read the messages from queue and displays but how to insert this feature while reading message FROM queue, read only if the message count has reached 10.
Why do you care how many messages are in the queue? MQ is NOT a database. If a message is in the queue then it should be processed. If you need to group messages together then have the sender use MQ's message grouping feature.
Did you read about MQ triggering? A program can be triggered (started) based on a triggering event. i.e. Trigger-first, trigger-every & trigger-depth.
Related
I am wring custom java code to read messages from Websphere MQ (version 8) and read all the headers from the MQ message.
When I use the MQHeaderList to parse all the headers the list size is 0:
MQMessage message = new MQMessage();
queue.get(message, getOptions);
DataInput in = new DataInputStream (new ByteArrayInputStream (b));
MQHeaderList headersfoundlist = null;
headersfoundlist = new MQHeaderList (in);
System.out.println("headersfoundlist size: " + headersfoundlist.size());
However, I read only a specific MQRFH2 it works
MQMessage message = new MQMessage();
queue.get(message, getOptions);
DataInput in = new DataInputStream (new ByteArrayInputStream (b));
MQRFH2 rfh2 = new MQRFH2(in);
Element usrfolder = rfh2.getFolder("usr", false);
System.out.println("usr folder" + usrfolder);
How can I parse all the headers of the MQ Message?
DataInput in = new DataInputStream (new ByteArrayInputStream (b));
What's that about? Not sure why you want to do that.
It should just be:
MQMessage message = new MQMessage();
queue.get(message, getOptions);
MQHeaderList headersfoundlist = new MQHeaderList(message);
System.out.println("headersfoundlist size: " + headersfoundlist.size());
Read more here.
Update:
#anshu's comment about it not working, well, I've always found MQHeaderList class to be very buggy. Hence, that is why I don't use it.
Also, 99.99% messages in MQ will only ever have 1 embedded MQ header (i.e. MQRFH2). Note: A JMS message == MQRFH2 message. The only case where you will find 2 embedded MQ headers are for messages on the Dead Letter Queue.
i.e.
{MQDLH}{MQRFH2}{message payload}
Is there a real need for your application to process multiple embedded MQ headers? Is your application putting/getting JMS messages (aka MQRFH2 messages)?
If so then you should do something like the following:
queue.get(receiveMsg, gmo);
if (CMQC.MQFMT_RF_HEADER_2.equals(receiveMsg.format))
{
receiveMsg.seek(0);
MQRFH2 rfh2 = new MQRFH2(receiveMsg);
int strucLen = rfh2.getStrucLength();
int encoding = rfh2.getEncoding();
int CCSID = rfh2.getCodedCharSetId();
String format= rfh2.getFormat();
int flags = rfh2.getFlags();
int nameValueCCSID = rfh2.getNameValueCCSID();
String[] folderStrings = rfh2.getFolderStrings();
for (String folder : folderStrings)
System.out.println.logger("Folder: "+folder);
if (CMQC.MQFMT_STRING.equals(format))
{
String msgStr = receiveMsg.readStringOfByteLength(receiveMsg.getDataLength());
System.out.println.logger("Data: "+msgStr);
}
else if (CMQC.MQFMT_NONE.equals(format))
{
byte[] b = new byte[receiveMsg.getDataLength()];
receiveMsg.readFully(b);
System.out.println.logger("Data: "+new String(b));
}
}
else if ( (CMQC.MQFMT_STRING.equals(receiveMsg.format)) ||
(CMQC.MQFMT_NONE.equals(receiveMsg.format)) )
{
Enumeration<String> props = receiveMsg.getPropertyNames("%");
if (props != null)
{
System.out.println.logger("Named Properties:");
while (props.hasMoreElements())
{
String propName = props.nextElement();
Object o = receiveMsg.getObjectProperty(propName);
System.out.println.logger(" Name="+propName+" : Value="+o);
}
}
if (CMQC.MQFMT_STRING.equals(receiveMsg.format))
{
String msgStr = receiveMsg.readStringOfByteLength(receiveMsg.getMessageLength());
System.out.println.logger("Data: "+msgStr);
}
else
{
byte[] b = new byte[receiveMsg.getMessageLength()];
receiveMsg.readFully(b);
System.out.println.logger("Data: "+new String(b));
}
}
else
{
byte[] b = new byte[receiveMsg.getMessageLength()];
receiveMsg.readFully(b);
System.out.println.logger("Data: "+new String(b));
}
I found the mistake in my code. I have a few more steps before reading the headers. It was moving the cursor in message buffer to the end.
I added message.setDataOffset(0); before reading headers and it worked.
I am developing a test script to put a message onto a queue using IBM MQ API 8.0. I am using JMeter 3.1 and Beanshell Sampler for this (see code below).
The problem I am having is setting the "Encoding" field in the MQ headers. I've tried different methods as per API documentation, but nothing worked for me.
Has anyone faced this issue?
Thanks in advance!
Code below:
try {
MQEnvironment.hostname = _hostname;
MQEnvironment.channel = _channel;
MQEnvironment.port = _port;
MQEnvironment.userID = "";
MQEnvironment.password = "";
log.info("Using queue manager: " + _qMgr);
MQQueueManager _queueManager = new MQQueueManager(_qMgr);
int openOptions = CMQC.MQOO_OUTPUT + CMQC.MQOO_FAIL_IF_QUIESCING + CMQC.MQOO_INQUIRE + CMQC.MQOO_BROWSE
+ CMQC.MQOO_SET_IDENTITY_CONTEXT;
log.info("Using queue: " + _queueName + ", openOptions: " + openOptions);
MQQueue queue = _queueManager.accessQueue(_queueName, openOptions);
log.info("Building message...");
MQMessage sendmsg = new MQMessage();
sendmsg.clearMessage();
// Set MQ MD Headers
sendmsg.messageType = CMQC.MQMT_DATAGRAM;
sendmsg.replyToQueueName = _queueName;
sendmsg.replyToQueueManagerName = _qMgr;
sendmsg.userId = MQuserId;
sendmsg.setStringProperty("BAH_FR", fromBIC); // from /AppHdr/Fr/FIId/FinInstnId/BICFI
sendmsg.setStringProperty("BAH_TO", toBIC); // from /AppHdr/To/FIId/FinInstnId/BICFI
sendmsg.setStringProperty("BAH_MSGDEFIDR", "pacs.008.001.05"); // from /AppHdr/MsgDefIdr
sendmsg.setStringProperty("BAH_BIZSVC", "cus.clear.01-" + bizSvc); // from /AppHdr/BizSvcr
sendmsg.setStringProperty("BAH_PRTY", "NORM"); // priority
sendmsg.setStringProperty("userId", MQuserId); // user Id
sendmsg.setStringProperty("ConnectorId", connectorId);
sendmsg.setStringProperty("Roles", roleId);
MQPutMessageOptions pmo = new MQPutMessageOptions(); // accept the defaults, same as MQPMO_DEFAULT constant
pmo.options = CMQC.MQOO_SET_IDENTITY_CONTEXT; // set identity context by userId
// Build message
String msg = "<NS1> .... </NS1>";
// MQRFH2 Headers
sendmsg.format = CMQC.MQFMT_STRING;
//sendmsg.encoding = CMQC.MQENC_INTEGER_NORMAL | CMQC.MQENC_DECIMAL_NORMAL | CMQC.MQENC_FLOAT_IEEE_NORMAL;
sendmsg.encoding = 546; // encoding - 546 Windows/Linux
sendmsg.messageId = msgID.getBytes();
sendmsg.correlationId = CMQC.MQCI_NONE;
sendmsg.writeString(msg);
String messageIdBefore = new String(sendmsg.messageId, "UTF-8");
log.info("Before put, messageId=[" + messageIdBefore + "]");
int depthBefore = queue.getCurrentDepth();
log.info("Queue Depth=" + depthBefore);
log.info("Putting message on " + _queueName + ".... ");
queue.put(sendmsg, pmo);
int depthAfter = queue.getCurrentDepth();
log.info("Queue Depth=" + depthAfter);
log.info("**** Done");
String messageIdAfter = new String(sendmsg.messageId, "UTF-8");
log.info("After put, messageId=[" + messageIdAfter + "]");
log.info("Closing connection...");
} catch (Exception e) {
log.info("\\nFAILURE - Exception\\n");
StringWriter errors = new StringWriter();
e.printStackTrace(new PrintWriter(errors));
log.error(errors.toString());
}
I think you are over thinking the problem. If you are not doing some sort of weird manual character/data conversion then you should be using:
sendmsg.encoding = MQC.MQENC_NATIVE;
I would like to catch incoming emails and send them a web service (rather than just to a mail server).
--
After some searching I found a way of getting new emails via polling - see below: This may be of some help to others. Is there a way to receive messages by SMTP? Perhaps by ISAPI ???
using Limilabs.Mail;
using Limilabs.Client.IMAP;
public ActionResult checkIMAPmail()
{
string rval = "not a sausage";
using (Imap imap = new Imap())
{
imap.Connect(<mail server>);
imap.Login(<username>, <password>);
imap.SelectInbox();
List<long> uids = imap.Search(Flag.Unseen);
foreach (long uid in uids)
{
byte[] ourBytes = imap.GetMessageByUID(uid);
IMail email = new MailBuilder().CreateFromEml(ourBytes);
rval = email.Subject + " [" + email.From + "][" + email.Text + "]";
}
imap.Close();
}
return Content(rval, "text/html");
}
See also http://stackoverflow.com/questions/670183/accessing-imap-in-c-sharp
for other IMAP packages, although note the change to using byte[], above.
Given that Limilabs.Mail is a paid service, I finally used MailKit:
using MailKit;
public int checkIMAPmail()
{
int numEmails = 0;
try {
using (var client = new MailKit.Net.Imap.ImapClient())
{
client.ServerCertificateValidationCallback = (s, c, h, e) => true;
client.Connect(ourSmtpClient);
// disable the XOAUTH2 authentication mechanism.
client.AuthenticationMechanisms.Remove("XOAUTH2");
client.Authenticate(ourSmtpAdminUser, ourSmtpAdminUserPwd);
// The Inbox folder is always available on all IMAP servers...
var inboxFolder = client.Inbox;
var savedFolder = client.GetFolder("saved");
inboxFolder.Open(FolderAccess.ReadWrite);
for (int ii = 0; ii < inboxFolder.Count; ii++)
{
var query = MailKit.Search.SearchQuery.NotSeen;
foreach (var uid in inboxFolder.Search(query))
{
var thisMsg = inboxFolder.GetMessage(uid);
string thisDate = notNullString(thisMsg.Date);
string thisSubject = notNullString( thisMsg.Subject);
string thisBody = notNullString(thisMsg.GetTextBody(0)); // plain text
string thisFromName = "";
string thisFromEmail = "";
if ( thisMsg.From != null)
{
// just get the first
foreach( var mb in thisMsg.From.Mailboxes)
{
thisFromName = notNullString( mb.Name);
thisFromEmail = notNullString( mb.Address);
break;
}
}
numEmails += 1;
// move email to saved
inboxFolder.MoveTo(uid, savedFolder);
}
}
client.Disconnect(true);
}
}
catch (Exception exc)
{
log2file("checkIMAPmail Error: " + exc.ToString());
}
return numEmails;
}
I'm trying to create an rpc program to communicate hosts located on different networks and chose Router-Dealer configuration of NetMQ provided here: http://netmq.readthedocs.io/en/latest/router-dealer/#router-dealer
But the problem is that router always selects a random dealer when routing a message to backend.
Code which I used :
using (var frontend = new RouterSocket(string.Format("#tcp://{0}:{1}", "127.0.0.1", "5556")))//"#tcp://10.0.2.218:5559"
using (var backend = new DealerSocket(string.Format("#tcp://{0}:{1}", "127.0.0.1", "5557")))//"#tcp://10.0.2.218:5560"
{
// Handler for messages coming in to the frontend
frontend.ReceiveReady += (s, e) =>
{
Console.WriteLine("message arrived on frontEnd");
NetMQMessage msg = e.Socket.ReceiveMultipartMessage();
string clientAddress = msg[0].ConvertToString();
Console.WriteLine("Sending to :" + clientAddress);
//TODO: Make routing here
backend.SendMultipartMessage(msg); // Relay this message to the backend };
// Handler for messages coming in to the backend
backend.ReceiveReady += (s, e) =>
{
Console.WriteLine("message arrived on backend");
var msg = e.Socket.ReceiveMultipartMessage();
frontend.SendMultipartMessage(msg); // Relay this message to the frontend
};
using (var poller = new NetMQPoller { backend, frontend })
{
// Listen out for events on both sockets and raise events when messages come in
poller.Run();
}
}
Code for Client:
using (var client = new RequestSocket(">tcp://" + "127.0.0.1" + ":5556"))
{
var messageBytes = UTF8Encoding.UTF8.GetBytes("Hello");
var messageToServer = new NetMQMessage();
//messageToServer.AppendEmptyFrame();
messageToServer.Append("Server2");
messageToServer.Append(messageBytes);
WriteToConsoleVoid("======================================");
WriteToConsoleVoid(" OUTGOING MESSAGE TO SERVER ");
WriteToConsoleVoid("======================================");
//PrintFrames("Client Sending", messageToServer);
client.SendMultipartMessage(messageToServer);
NetMQMessage serverMessage = client.ReceiveMultipartMessage();
WriteToConsoleVoid("======================================");
WriteToConsoleVoid(" INCOMING MESSAGE FROM SERVER");
WriteToConsoleVoid("======================================");
//PrintFrames("Server receiving", clientMessage);
byte[] rpcByteArray = null;
if (serverMessage.FrameCount == 3)
{
var clientAddress = serverMessage[0];
rpcByteArray = serverMessage[2].ToByteArray();
}
WriteToConsoleVoid("======================================");
Console.ReadLine();
}
Code for Dealer:
using (var server = new ResponseSocket())
{
server.Options.Identity = UTF8Encoding.UTF8.GetBytes(confItem.ResponseServerID);
Console.WriteLine("Server ID:" + confItem.ResponseServerID);
server.Connect(string.Format("tcp://{0}:{1}", "127.0.0.1", "5557"));
using (var poller = new NetMQPoller { server })
{
server.ReceiveReady += (s, a) =>
{
byte[] response = null;
NetMQMessage serverMessage = null;
try
{
serverMessage = a.Socket.ReceiveMultipartMessage();
}
catch (Exception ex)
{
Console.WriteLine("Exception on ReceiveMultipartMessage : " + ex.ToString());
//continue;
}
byte[] eaBody = null;
string clientAddress = "";
if (serverMessage.FrameCount == 2)
{
clientAddress = serverMessage[0].ConvertToString();
Console.WriteLine("ClientAddress:" + clientAddress);
eaBody = serverMessage[1].ToByteArray();
Console.WriteLine("Received message from remote computer: {0} bytes , CurrentID : {1}", eaBody.Length, confItem.ResponseServerID);
}
else
{
Console.WriteLine("Received message from remote computer: CurrentID : {0}", confItem.ResponseServerID);
}
};
poller.Run();
}
}
Is it possible to choose a specific backend on frontend.ReceiveReady?
Thanks!
Your backend should be router as well. You need the worker to register or you need to know all the available workers and their identity. When send on the backend push the worker identity at the beginning of the server.
Take a look at the Majordomo example in the zeromq guide:
http://zguide.zeromq.org/page:all#toc72
http://zguide.zeromq.org/page:all#toc98
I am fairly new to MQMessage broker. In my project, I want to send an xml message. Every thing is ok but when message get larger than 500 bytes, My code send broken message to the Queue. what I am doing is
//queueManager has been initialized in the class constructor and connected to a channel.
public MQResponse WriteMsg(string QueueName, string strInputMsg)
{
MQResponse response = new MQResponse();
try
{
queue = queueManager.AccessQueue(QueueName,
MQC.MQOO_OUTPUT + MQC.MQOO_FAIL_IF_QUIESCING );
queueMessage = new MQMessage();
queueMessage.DataOffset = 0;
//queueMessage.MessageLength = 2000000;
queueMessage.ResizeBuffer(6 * strInputMsg.Length);
queueMessage.WriteString(strInputMsg);
queueMessage.Format = MQC.MQFMT_STRING;
queuePutMessageOptions = new MQPutMessageOptions();
queue.Put(queueMessage, queuePutMessageOptions);
response.Message = "Message sent to the queue successfully";
response.Status=MQResponseStatus.WriteSuccessful;
}
catch (MQException MQexp)
{
response.Message = "Exception: " + MQexp.Message;
response.Status=MQResponseStatus.WriteFail;
response.CatchedException=MQexp;
}
catch (Exception exp)
{
response.Message = "Exception: " + exp.Message;
response.Status=MQResponseStatus.WriteFail;
response.CatchedException=exp;
}
return response;
}
I guess queueMessage should be initialized correctly so that we able to send whole message.
First of all how did you determine that the message is broken? Did you try to receive the sent message and compared with the original message or you viewed the message using MQExplorer or some other means. MQExplorer by default displays first 1000 bytes of the message. To view more you need to change the Max data bytes displayed setting in Window/Preferences/Messages panel.
WebSphere MQ can handle messages of size as large as 100 MB.
Regarding your code snippet above: The few lines of code is enough to build and send a message.
queueMessage = new MQMessage();
queueMessage.Format = MQC.MQFMT_STRING;
queueMessage.WriteString(strInputMsg);
queuePutMessageOptions = new MQPutMessageOptions();
queue.Put(queueMessage, queuePutMessageOptions);