what APIs are available to connect to IBM websphere MQ - ibm-mq

Question

I have a requirement, where I need to use IBM websphere message queue pub sub functionality.
Basically I have to write the subscriber part.
I need to know what all programming languages I can use to write the API other than java.
Can I write it using perl/shell/python?

Answer 1

There is PyMQI available for Python lovers. But note this offering is NOT from IBM.

Answer 2

Use MQ Client API. It does include samples for C++ like this one:
int main ( int argc, char * * argv ) {
ImqQueueManager mgr; // Queue manager
ImqQueue queue; // Queue
ImqMessage msg; // Data message
ImqGetMessageOptions gmo; // Get message options
char buffer[ 101 ]; // Message buffer
ImqChannel * pchannel = 0 ; // Channel definition
printf( "Sample IMQSGET start\n" );
if ( argc < 2 ) {
printf( "Required parameter missing - queue name\n" );
exit( 99 );
}
// Create object descriptor for subject queue
queue.setName( argv[ 1 ] );
if ( argc > 2 ) {
mgr.setName( argv[ 2 ] );
}
// Define a channel for client communication.
if ( argc > 3 ) {
ImqString strParse( argv[ 3 ] );
ImqString strToken ;
pchannel = new ImqChannel ;
pchannel -> setHeartBeatInterval( 1 );
// Break down the channel definition,
// which is of the form "channel-name/transport-type/connection-name".
if ( strParse.cutOut( strToken, '/' ) ) {
pchannel -> setChannelName( strToken );
if ( strParse.cutOut( strToken, '/' ) ) {
// Interpret the transport type.
if ( strToken.upperCase( ) == (ImqString)"LU62" ) {
pchannel -> setTransportType( MQXPT_LU62 );
}
if ( strToken.upperCase( ) == (ImqString)"NETBIOS" ) {
pchannel -> setTransportType( MQXPT_NETBIOS );
}
if ( strToken.upperCase( ) == (ImqString)"SPX" ) {
pchannel -> setTransportType( MQXPT_SPX );
}
if ( strToken.upperCase( ) == (ImqString)"TCP" ) {
pchannel -> setTransportType( MQXPT_TCP );
}
// Establish the connection name.
if ( strParse.cutOut( strToken ) ) {
pchannel -> setConnectionName( strToken );
}
}
}
mgr.setChannelReference( pchannel );
}
// Connect to queue manager
if ( ! mgr.connect( ) ) {
/* stop if it failed */
printf( "ImqQueueManager::connect failed with reason code %ld\n",
(long)mgr.reasonCode( ) );
exit( (int)mgr.reasonCode( ) );
}
// Associate queue with queue manager.
queue.setConnectionReference( mgr );
// Open the named message queue for input; exclusive or shared
// use of the queue is controlled by the queue definition here
queue.setOpenOptions(
MQOO_INPUT_AS_Q_DEF /* open queue for input */
+ MQOO_FAIL_IF_QUIESCING
); /* but not if MQM stopping */
queue.open( );
/* report reason, if any; stop if failed */
if ( queue.reasonCode( ) ) {
printf( "ImqQueue::open ended with reason code %ld\n",
(long)queue.reasonCode( ) );
}
if ( queue.completionCode( ) == MQCC_FAILED ) {
printf( "unable to open queue for input\n" );
}
// Get messages from the message queue
// Loop until there is a failure
msg.useEmptyBuffer( buffer, sizeof( buffer ) - 1 );
/* buffer size available for GET */
gmo.setOptions( MQGMO_WAIT | /* wait for new messages */
MQGMO_FAIL_IF_QUIESCING );
gmo.setWaitInterval( 15000 ); /* 15 second limit for waiting */
while ( queue.completionCode( ) != MQCC_FAILED ) {
// In order to read the messages in sequence, MsgId and
// CorrelID must have the default value. MQGET sets them
// to the values in for message it returns, so re-initialise
// them before every call
msg.setMessageId( );
msg.setCorrelationId( );
if ( queue.get( msg, gmo ) ) {
// Display each message received
if ( msg.formatIs( MQFMT_STRING ) ) {
buffer[ msg.dataLength( ) ] = 0 ; /* add terminator */
printf( "message <%s>\n", msg.bufferPointer( ) );
} else {
printf( "Non-text message\n" );
}
} else {
/* report reason, if any */
if ( queue.reasonCode( ) == MQRC_NO_MSG_AVAILABLE ) {
/* special report for normal end */
printf( "no more messages\n" );
} else {
/* general report for other reasons */
printf( "ImqQueue::get ended with reason code %ld\n",
(long)queue.reasonCode( ) );
/* treat truncated message as a failure for this sample */
if ( queue.reasonCode( ) == MQRC_TRUNCATED_MSG_FAILED ) {
break ;
}
}
}
}
// Close the source queue (if it was opened)
if ( ! queue.close( ) ) {
/* report reason, if any */
printf( "ImqQueue::close failed with reason code %ld\n",
(long)queue.reasonCode( ) );
}
// Disconnect from MQM if not already connected (the
// ImqQueueManager object handles this situation automatically)
if ( ! mgr.disconnect( ) ) {
/* report reason, if any */
printf( "ImqQueueManager::disconnect failed with reason code %ld\n",
(long)mgr.reasonCode( ) );
}
// Tidy up the channel object if allocated.
if ( pchannel ) {
mgr.setChannelReference( );
delete pchannel ;
}
printf( "Sample IMQSGET end\n" );
return( 0 );
}

Answer 3

IBM offers MQ clients for the following languages:
C, C++, .NET, Java

Answer 4

WebSphere MQ provides support for the following programming procedural languages:
C
Visual Basic (Windows systems only)
COBOL
Assembler language (WebSphere MQ for z/OS® only)
RPG (WebSphere MQ for IBM® i only)
PL/I (WebSphere MQ for z/OS only)
These languages use the message queue interface (MQI) to access message queueing services.
WebSphere MQ provides support for:
.NET
ActiveX
C++
Java
JMS
These languages use the WebSphere MQ Object Model, which provides classes that provide the same functionality as WebSphere MQ calls and structure.
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