MQSeries commands
MQSeries commands
•
runmqsc < amqscos0.tst >test.out
Create
a Queue Manager
crtmqm –q qmDefault
Start
the queue manager
strmqm qmDefault
Create
a Queue
•
runmqsc (To enable MQSC commands)
•
define qlocal (‘qTest’)
•
end (To stop MQSC)
Create
a default queue manager called QMSENDER
•
crtmqm -q QMSENDER
Start
the default queue manager. Enter the following command:
•
strmqm QMSENDER
Enable
MQSC commands. Enter the following command:
•
Runmqsc
In the MQSC command window,
define a sender channel. Enter the following command:
• define channel(QMSENDER.QMRECEIVER) chltype(sdr) conname("con-name(port)")
xmitq(TRANSMITQSENDER) trptype(tcp)
Alog
•
mqConnect();// queue manager connection
•
mqOpen();// Opens the queue & browse
•
mqClose();// close the queue
•
mqDisconnect();// disconnects the queue
manager
mqConnect()
•
MQEnvironment contains static member
variables that control the environment in which an MQQueueManager object is
constructed.
•
MQEnvironment.hostname= hostName;
•
MQEnvironment.channel= channel;
•
MQEnvironment.port=
Integer.parseInt(port);
•
mqQueueManager = new MQQueueManager(qmgrName);
mqOpen()
•
openOption = MQC.MQOO_OUTPUT;
•
queue = mqQueueManager.accessQueue(qName,
openOption,null,null,null);
•
MQMessage message = new MQMessage();
•
MQPutMessageOptions pmo = new
MQPutMessageOptions();
•
queue.put(message, pmo);
mqClose
•
queue.close();
MQException
•
C:\>mqrc 2009
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WebSphere MQ Objects
WebSphere MQ objects
•
The WebSphere MQ objects are:
•
Queue
managers
•
Queues
•
Process
definitions
•
Channels
•
Listeners
Queue
managers
•
A queue manager supplies an application
with WebSphere MQ services. A program must have a connection to a queue manager
before it can use the services of that queue
•
MQueueManager
mqQueueManager = new MQQueueManager(qmgrName);
Attributes
of Queue managers
•
Associated with each queue manager is a set
of attributes (or properties) that define its characteristics. Some of the
attributes of a queue manager are fixed when it is created; you can change
others using the WebSphere MQ commands.
•
The fixed attributes include:
•
The name of the queue manager
•
The maximum priority that you can assign to
messages processed by the queue manager
•
The maximum length of messages the queue
manager can process
Changeable attributes
include:
•
A text description of the queue manager
•
The identifier of the character set the queue
manager uses for character strings when it processes MQI calls
•
The name of the queue manager’s dead-letter
(undelivered message) queue
•
The name of the queue manager’s default
transmission queue
The maximum number of open handles for any one connection
The maximum number of open handles for any one connection
Queues
•
A WebSphere MQ queue is a named object on
which applications can put messages, and from which applications can get
messages. Messages are stored on a queue, so that if the putting application is
expecting a reply to its message, it is free to do other work while waiting for
that reply.
Types of Queues:
•
Local and remote
queues
•
A queue is known to
a program as local if it is owned by the queue manager to which the program
is connected; the queue is known as remote.
Alias queues
To your program, an alias
queue appears to be a queue, but it is really a WebSphere MQ object that you
can use to access another queue.
Model and dynamic queues
A model queue is a template of a queue
definition used only when you want to create a dynamic local queue.
Process definitions
•
To allow an application to be started without
the need for operator intervention
Channels
•
A channel is a communication link used by
distributed queue managers.
Listeners
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WebSphere MQ messages
WebSphere MQ messages
•
WebSphere MQ messages are made up of two
parts:
•
1. Message descriptor
•
2. Application data
Message descriptor
•
You can access message control information
using the MQMD structure.
Types of message
•
There are four types of message defined by
WebSphere MQ:
•
Datagram
•
Request
•
Reply
•
Report
Datagrams
•
Use a datagram when you do not require a
reply from the application that receives the message (that is, gets the message
from the queue).
•
An example of an application that could use
datagrams is one that displays flight information in an airport lounge. A
message could contain the data for a whole screen of flight information.
Request messages
•
Use a request message when you want a
reply from the application that receives the message.
Reply messages
•
Use a reply message when you reply to
another message.
•
When
you create a reply message, respect any options that were set in the message
descriptor of the message to which you are replying.
Report messages
•
Report messages inform applications
about events such as the occurrence of an error when processing a message. They
can be generated by:
•
A
queue manager,
•
A
message channel agent (for example, if they cannot deliver the message), or
•
An application (for example, if it cannot use
the data in the message).
Types of Report messages
•
Exception report message.
•
This is sent in response to a message with the
exceptions flag set
•
Expiry report message.
•
This indicates that an application attempted
to retrieve a message that had reached its expiry threshold.
•
confirmation of arrival (COA) report
message
•
This indicates that the message has reached
its target queue
•
Confirmation of delivery (COD) report
message.
•
This indicates that the message has been
retrieved by a receiving application
•
Negative action notification (NAN)
report message. This indicates that a request has not been successfully
serviced
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Message Queuing Concepts
•This
technology builds on two basic concepts: messages and queues:
Queues:
•A
Queue is a container of messages. New messages are placed at the end of the
queue, and messages
•are
usually retrieved from the front of the queue.
Queuing is the mechanism by which messages are held until an application is ready to process them.
Queuing allows you to:
1. Communicate between programs
2. Select the order in which a program processes messages.
3. Balance loads on a system
4. Increase the availability of your applications
Provides
a buffer between the producer and consumer
•Asynchronous
•Producer and consumer communicates in Asynchronous mode . i.e.
No wait state.
•Synchronous
•Producer must wait for the consumer to become available and
complete the processing of the message before being able to continue
•Batch processing
•A server might not want to process and consume each message as it arrives on a
particular queue and process them in one batch.
Message:
•A
node in a system often needs to communicate information to, or request a
service from, another node in that system or an interconnected system. This
•piece
of information or request can be considered a message
•In
message queuing, a message
is a collection of data sent by one program and intended for another program.•
•WebSphere MQ defines four types of message:
• Datagram A
simple message for which no reply is expected
• Request A
message for which a reply is expected
• Reply A
reply to a request message
• Report A
message that describes an event such as the
• occurrence of an error
•A WebSphere MQ
message consists of control information and application data.
•The
control information is defined in a message descriptor structure (MQMD) and contains such things
as:
•The type of the message
• An identifier for the message
• The priority for delivery of the message
Types of Messaging:
-- Point-to-point
-- Publish/Subscribe
Point-to-point Messaging
Types of Messaging:
-- Point-to-point
-- Publish/Subscribe
Point-to-point Messaging
•Many
messages are intended to be consumed exactly once. The point within the system
that consumes the message might or might not be known to the producer of the
message.
•The
producer provides enough information for the messaging infrastructure to
deliver the message to a single consumer.
•In
point-to-point messaging a message arrives once, and once only, at a single and
correct destination.
Categories of PTP Messaging
•Send
and forget messaging:
•A
message is sent to a service that performs an action based on that message.
•Request/reply
messaging:
•A
message is sent to a service that performs an action based on that message and
then returns a reply to the originator of the message.
Publish/Subscribe Messaging
•Publish/subscribe
messaging provides the concept of a topic on which any
•number
of interested consumers of information can subscribe in order to register
•their
interest. This is similar to the way that a person might subscribe only to
•magazines
about topics in which they are interested. Each topic provides
•particular
event or state information.
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WebSphere MQ
The WebSphere MQ is an IBM product on Message Queuing .
It is a product that enable programs to communicate with one another across a network of
unlike components (processors, operating systems, subsystems and communication
protocols) using a consistent application programming interface.
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What Is Message Queuing ?
Message Queuing
•Message
Queuing (aka MQ) is a way for applications running on
various platforms, at various times and various servers, to communicate with
each other across heterogeneous networks that may be temporarily off-line. It
provides a form of communication between applications without the hassle of
dealing with low-level communication interfaces/protocols.
•In a
queuing environment, messages between therefor only the queuing system must be available.
After the message is put in the queuing system, it is made available by the
queuing system to the receiving
application .
•Messages are stored in queues until an application is ready to
read and process them; this is an asynchronous communications method. A
synchronous method is also possible, using the Request-Reply mechanism
This is one of important technology of Application servers and enterprise applications.
Main features of Message queuing:
Main features of Message queuing:
•1.
There are no direct connections between programs.
•2.
Communication between programs can be time-independent.
•3.
Work can be carried out by small, self-contained programs.
•4.
Communication can be driven by events.
•5.
Applications can assign a priority to a message
•6.
Security.
7. Data integrity.
7. Data integrity.
•8.
Recovery support.
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Where to find oracle database installers ?
Oracle database installers can be found and installed from official oracle website.
Below are the links to download oracle database
Below are the links to download oracle database
- From Oracle 11g Release2, database installers can be found at below location http://www.oracle.com/technetwork/database/enterprise-edition/downloads/index.html
- Oracle Database 10.2 and 11.1 are no longer available for download from oracle website. The software is available as a media or FTP request for those customers who own a valid Oracle Database product license for any edition
- These previously release version of database can be found on My Oracle Support
All the downloads of oracle database are on license basis so adhere to oracle licensing policy and contact oracle database sales group.
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What is MySql ?
MySQL is the world’s most popular open source database, enabling the cost-effective delivery of reliable, high-performance and salable Web-based and embedded database applications.It is based on RDBMS database i.e. Relational database management system.
MySQL is a popular choice of database for use in web applications, and is a central component of the widely used LAMP open source web application software stack. LAMP is an acronym for "Linux, Apache, MySQL, Perl/PHP/Python." Free-software-open source projects that require a full-featured database management system often use MySQL.
MySql was product of Sun microsystems but few years back iSUN was bought by Oracle. Since then it became part of Oracle product.
MySql products can be downloaded from link
MySQL is a popular choice of database for use in web applications, and is a central component of the widely used LAMP open source web application software stack. LAMP is an acronym for "Linux, Apache, MySQL, Perl/PHP/Python." Free-software-open source projects that require a full-featured database management system often use MySQL.
MySql was product of Sun microsystems but few years back iSUN was bought by Oracle. Since then it became part of Oracle product.
MySql products can be downloaded from link
MySQL Editions
In addition to MySQL's ease of use, high performance and reliability you can benefit from advanced features, management tools and technical support to develop, deploy and manage your MySQL applications.
- MySQL Enterprise Edition
- MySQL Standard Edition
- MySQL Classic Edition
- MySQL Cluster CGE
- MySQL Embedded (OEM/ISV)
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