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| MQSC Commands using Java |
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Message
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| jigjim |
 Posted: Tue May 04, 2004 11:59 am Post subject: MQSC Commands using Java |
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Apprentice
Joined: 30 Mar 2004
Posts: 41
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Hi,
I am using Java langaue to do a MQClient Connection to a MQ Series server on z/OS.
When i execute MQSC commands on the SYSTEM.COMMAND.INPUT Q, i get the following error message of type CSQN205I ....
RETURN=00D50211, REASON=FFFFFFFF ,
00D50211
Explanation: The command processor got a command from the system-command-input queue, but was unable to process it because the command message consisted of blank characters only.
I send the command in JAva as :
| Code: |
sendM = new MQMessage();
sendM.writeUTF("DISPLAY QMGR ALL");
sendM.messageType = MQC.MQMT_REQUEST;
sendM.format = MQC.MQFMT_STRING;
sendM.replyToQueueName = replyQueueName;
sendQ.put(sendM, pmo); |
Can somebody pls help me what is wrong in the above code and why it sends blank strings only?
Thanks
Jignesh |
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| EddieA |
| Posted: Tue May 04, 2004 12:37 pm Post subject: |
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Jedi
Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles
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Use writeString, not writeUTF. writeUTF prefixes the data with a length field.
Cheers,
_________________
Eddie Atherton
IBM Certified Solution Developer - WebSphere Message Broker V6.1
IBM Certified Solution Developer - WebSphere Message Broker V7.0 |
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| jigjim |
| Posted: Wed May 05, 2004 9:18 am Post subject: |
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Apprentice
Joined: 30 Mar 2004
Posts: 41
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Thanks,
I got it wworking with readString(). I now am facing problems reading it:
Following is the code i use to read it:
| Code: |
replyQ = qmgr.accessQueue (replyQueueName, MQC.MQOO_INPUT_AS_Q_DEF, "", "", "");
gmo.options = MQC.MQGMO_WAIT | MQC.MQGMO_CONVERT ;
recvM = new MQMessage();
replyQ.get(recvM, gmo);
String msgLine = recvM.readLine();
int lineLength = msgLine.length();
System.out.println("The message Line length is : "+lineLength);
System.out.println("The Line message is : "+msgLine); |
I get the following responses:
On first run:
| Quote: |
The message Line length is : 59
The Line message is : CSQN205I COUNT= 3, RETURN=00000000, REASON=00000000 |
On second run: (The information i need)
| Quote: |
The message Line length is : 1412
The Line message is : CSQM409I &MQO1 QMNAME(MQO1 ) DESCR(MQO1, IBM MQSeries for OS/390 - V5.2 ) PLATFORM(MVS ) CPILEVEL( 100) CMDLEVEL( 531) CCSID( 500) MAXPRTY( 9) MAXMSGL( 104857600) SYNCPT(AVAILABLE ) QSGNAME( ) COMMANDQ(SYSTEM.COMMAND.INPUT ) DEADQ(MQO1.DEAD.QUEUE ) TRIGINT( 999999999) MAXHANDS( 256) MAXUMSGS( 10000) EXPRYINT(OFF ) AUTHOREV(DISABLED ) INHIBTEV(DISABLED ) LOCALEV(DISABLED ) REMOTEEV(DISABLED ) STRSTPEV(ENABLED ) PERFMEV(DISABLED ) CONFIGEV(DISABLED ) CHADEXIT( ) CLWLDATA( ) CLWLEXIT( ) CLWLLEN( 100) REPOS( ) REPOSNL(MQO1MVS.NL.CLUSTERS.WITH.FULL.REPOSITORIES ) QMID(MQO1.BB236140F14A6901 ) DEFXMITQ( ) SSLKEYR( ) SSLCRLNL( ) SSLTASKS( 0) IGQ(DISABLED ) IGQAUT(DEF ) IGQUSER( ) ALTDATE(2004-05-03 ) ALTTIME(10.27.25) |
On third run:
| Quote: |
The message Line length is : 57
The Line message is : CSQ9022I &MQO1 CSQMDRTS ' DISPLAY QMGR' NORMAL COMPLETION |
Is there any way i can read the whole message at one go?
Also is it possible as in PCF to get all the attributes setup in an object so that i can access them using methods like getParameter() ...
I also tried the below alternative method to read the msg, but faced the same probs.
| Code: |
/*
int msgLength = recvM.getMessageLength();
String msgText = recvM.readString(msgLength);
System.out.println("The message length is : "+msgLength);
System.out.println("The message is : "+msgText);
*/ |
Thanks
jignesh |
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| jefflowrey |
| Posted: Wed May 05, 2004 10:06 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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To read a message fully, use the readFully() method.
_________________
I am *not* the model of the modern major general. |
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| EddieA |
| Posted: Wed May 05, 2004 10:25 am Post subject: |
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Jedi
Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles
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| Quote: |
| To read a message fully, use the readFully() method. |
That's not the issue. The problem is that the replies sent back from Z/OS *always* come as multiple messages. From the manual:
| Quote: |
| Each request message correctly processed by WebSphere MQ produces at least two reply messages. Each reply message contains a single WebSphere MQ user message. |
There's no way you're going to change that.
Cheers,
_________________
Eddie Atherton
IBM Certified Solution Developer - WebSphere Message Broker V6.1
IBM Certified Solution Developer - WebSphere Message Broker V7.0 |
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| jigjim |
| Posted: Wed May 05, 2004 10:36 am Post subject: |
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Apprentice
Joined: 30 Mar 2004
Posts: 41
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Can you give me a sample code on how to use it. I tried the following and got the following error message:
| Code: |
int len = recvM.readInt();
System.out.println("msg length is: "+len);
byte[] data = new byte[len];
System.out.println("Initialising the data array");
recvM.readFully(data,0,len);
String msg = new String(data);
System.out.println("the msg is: "+msg); |
The response i got was:
| Quote: |
*** In MQSCRecvClient ***
Connecting to queue manager at host: ABC port : 1414 channel: SYSTEM.DEF.SVRCONN
Connected to: MQO1
Command Q for MQO1 is : SYSTEM.COMMAND.INPUT
msg length is: 1129533773
java.lang.OutOfMemoryError
Exception in thread "main" |
This is only for a one line display of DISPLAY QMGR ALL. IF i do something like DISPLAY QUEUE (*) then it will be a very big message.
Please post a sample code, if you have one
Thanks
Jignesh |
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| EddieA |
| Posted: Wed May 05, 2004 11:32 am Post subject: |
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Jedi
Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles
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| Quote: |
| int len = recvM.readInt() |
You are reading the 1st 4 bytes of a TEXT message, but telling telling Java that it's an INT. Of course this will give screwy results.
Use getDataLength if you want to find out how big a message is.
| Quote: |
| IF i do something like DISPLAY QUEUE (*) then it will be a very big message. |
No. It will probably send this back as multiple messages. The COUNT field of the 1st message will tell you how many messages, in total, the reply is. And there also "may" be multiple blocks of replies.
This is all explained in: WebSphere MQ for z/OS System Administration Guide.
Cheers,
_________________
Eddie Atherton
IBM Certified Solution Developer - WebSphere Message Broker V6.1
IBM Certified Solution Developer - WebSphere Message Broker V7.0 |
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