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%Net.abstractMQ

abstract class %Net.abstractMQ extends %Library.RegisteredObject

 
The %Net.MQ class provides an interface to the IBM WebSphere MQ Series messaging product.  Two classes are provided, MQSend for sending messages to a queue, and MQRecv for picking up messages that have been queued.

Usage

An MQ object is created when an instance of an MQ class is created via %New. Following creation, the class can be assigned an error log file, and connected to an MQ Server.

The %Init() method is a simple way to perform both these functions.

For advanced applications, these steps can be performed via separate method calls.

To establish an error log file for the class, call %ErrLog().

A connection is established by calling the %Connect() method. The connection is maintained until you deallocate the instance. The instance must be successfully connected before it can be used for message queuing.

Use MQSend.%Put() to send messages to a queue.  Use MQRecv.%Get() to read messages from a queue.

All methods return 1 for success, 0 for failure. In case of a failure, the actual MQ error code is available via the method %GetLastError().

Charcter Set Translation

%CharSet(.ccs) Retrieves the Coded Character Set identifier. This value may be altered by the message system after an unsuccessful attempt to convert data in MQGet.

%SetCharSet(id) Sets the Coded Character Set identifier. Incoming messages will be converted to this character set. Outgoing message's character set encoding is identified to the message queue with this value.

For output (MQSend.%Put()), the Coded Character Set Id describes to the system the char set used for the message. If not set, the MQ system assumes the default character set for the MQ client.

For input (MQRecv.%Get()), the Coded Character Set Id indicates to the MQ client how the message should be converted. The conversion is done automatically during message reciept on the client.

Thus one may send messages in any encoding (notifying the system what the encoding used is), and receive messages converting from one encoding to another.

Example:

To convert a message encoded in EBCDIC (Character Coded Set Id 1047, indicating IBM-1047 coding), a user on a Windows system may wish to convert using code 437 (the default on Windows systems). Then the following will convert the EBCDIC message to ascii on the windows system:

Do mq.%SetCharSet(437) ;437 English ascii code on Windows

Do mq.%Get(.msg) ;converts the message to 437 code

MQ Documentation

Consult the IBM WebSphere MQ website for further documentation.
 
 

Parameters

parameter ApplIdentityData = 5;
parameter CorrelationId = 2;
parameter MessageId = 1;
parameter ReplyQMgrName = 3;
parameter ReplyQName = 4;

Properties

property ApplIdentityData as %String;
Message Descriptor Options: Application Identity
Property methods: ApplIdentityDataDisplayToLogical(), ApplIdentityDataGet(), ApplIdentityDataIsValid(), ApplIdentityDataLogicalToDisplay(), ApplIdentityDataLogicalToOdbc(), ApplIdentityDataNormalize(), ApplIdentityDataSet()
property Channel as %String;
Channel Definition Options: Channel Name
Property methods: ChannelDisplayToLogical(), ChannelGet(), ChannelIsValid(), ChannelLogicalToDisplay(), ChannelLogicalToOdbc(), ChannelNormalize(), ChannelSet()
property CharSetId as %Integer;
Message Descriptor Options: Character Set Identifier
Property methods: CharSetIdDisplayToLogical(), CharSetIdGet(), CharSetIdIsValid(), CharSetIdLogicalToDisplay(), CharSetIdNormalize(), CharSetIdSet()
property Connection as %String;
Channel Definition Options: Connection name
Property methods: ConnectionDisplayToLogical(), ConnectionGet(), ConnectionIsValid(), ConnectionLogicalToDisplay(), ConnectionLogicalToOdbc(), ConnectionNormalize(), ConnectionSet()
property Context as %Integer [ InitialExpression = 0 ];
Flag indicating use of message context 0 - DEFAULT, 1 - IDENTITY, 2 - ALL
Property methods: ContextDisplayToLogical(), ContextGet(), ContextIsValid(), ContextLogicalToDisplay(), ContextNormalize(), ContextSet()
property CorrelationId as %String;
Message Descriptor Options: Correlation Id
Property methods: CorrelationIdDisplayToLogical(), CorrelationIdGet(), CorrelationIdIsValid(), CorrelationIdLogicalToDisplay(), CorrelationIdLogicalToOdbc(), CorrelationIdNormalize(), CorrelationIdSet()
property MessageId as %String;
Message Descriptor Options: Message Id
Property methods: MessageIdDisplayToLogical(), MessageIdGet(), MessageIdIsValid(), MessageIdLogicalToDisplay(), MessageIdLogicalToOdbc(), MessageIdNormalize(), MessageIdSet()
property PutApplType as %Integer;
Message Descriptor Options: Put application type
Property methods: PutApplTypeDisplayToLogical(), PutApplTypeGet(), PutApplTypeIsValid(), PutApplTypeLogicalToDisplay(), PutApplTypeNormalize(), PutApplTypeSet()
property QMBehavior as %Integer [ InitialExpression = 0 ];
Flag indicating Queue Manager behavior 0 - commit on disconnect (DEFAULT), 1 - backout on disconnect
Property methods: QMBehaviorDisplayToLogical(), QMBehaviorGet(), QMBehaviorIsValid(), QMBehaviorLogicalToDisplay(), QMBehaviorNormalize(), QMBehaviorSet()
property QMgr as %String;
Queue Manager name
Property methods: QMgrDisplayToLogical(), QMgrGet(), QMgrIsValid(), QMgrLogicalToDisplay(), QMgrLogicalToOdbc(), QMgrNormalize(), QMgrSet()
property QName as %String;
Queue name
Property methods: QNameDisplayToLogical(), QNameGet(), QNameIsValid(), QNameLogicalToDisplay(), QNameLogicalToOdbc(), QNameNormalize(), QNameSet()
property ReplyQMgrName as %String;
Message Descriptor Options: Reply Q Manager name
Property methods: ReplyQMgrNameDisplayToLogical(), ReplyQMgrNameGet(), ReplyQMgrNameIsValid(), ReplyQMgrNameLogicalToDisplay(), ReplyQMgrNameLogicalToOdbc(), ReplyQMgrNameNormalize(), ReplyQMgrNameSet()
property ReplyQName as %String;
Message Descriptor Options: Reply Q name
Property methods: ReplyQNameDisplayToLogical(), ReplyQNameGet(), ReplyQNameIsValid(), ReplyQNameLogicalToDisplay(), ReplyQNameLogicalToOdbc(), ReplyQNameNormalize(), ReplyQNameSet()
property SSLCipherSpec as %String;
Channel Definition Options: SSL Cipher Spec
Property methods: SSLCipherSpecDisplayToLogical(), SSLCipherSpecGet(), SSLCipherSpecIsValid(), SSLCipherSpecLogicalToDisplay(), SSLCipherSpecLogicalToOdbc(), SSLCipherSpecNormalize(), SSLCipherSpecSet()
property Syncpoint as %Boolean [ InitialExpression = 0 ];
Flag indicating use of SYNCPOINT
Property methods: SyncpointDisplayToLogical(), SyncpointGet(), SyncpointIsValid(), SyncpointLogicalToDisplay(), SyncpointNormalize(), SyncpointSet()
property Transport as %String;
Channel Definition Options: Transport type
Property methods: TransportDisplayToLogical(), TransportGet(), TransportIsValid(), TransportLogicalToDisplay(), TransportLogicalToOdbc(), TransportNormalize(), TransportSet()

Methods

method %ApplIdentityData(ByRef Value As %String) as %Boolean
The %ApplIdentityData method returns the Application Identity Data for the last message read. 
method %Backout() as %Boolean
%Backout backs out changes to the queue. Used in conjunction with the syncpoint option. If the syncpoint option is set, then when sending, no messages are visible on the queue until commit. If backout is called, all the messages sent since the last commit are removed from the queue. When receiving, the messages are not removed from the queue until commit is issued. If backout is called, the messages are restored to the queue and available to users.

%Backout returns 0 on failure, 1 on success.

method %CharSet(ByRef Value As %Integer) as %Boolean
The %CharSet method returns the current value of the Coded Character Set Id used for message conversion.  The CCSId may also be set to the message's Character Set if conversion was not possible.
method %Commit() as %Boolean
%Commit commi