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What is Qpid ?

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The java implementation of Qpid is a pure Java message broker that implements the AMQP protocol. Essentially, Qpid is a robust, performant middleware component that can handle your messaging traffic. One of the most attractive aspects of Qpid is its cost - there is no licensing cost  !

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• High performance header-based routing for messages
• Most features required by the JMS 1.1 specification. See our roadmap for details of missing JMS features and when we expect to add them.
• Transaction support
• Persistence using the high performance Berkeley DB Java Edition. The persistence layer is also pluggable should an alternative implementation be required.
• Pluggable security using SASL. Any Java SASL provider should be capable of working with Blaze.
• Management using JMX and MC4J (again see our roadmap for details of this feature and our future plans in this area)
• Clustering for scalability
• .NET API implementation (currently an alpha release; see our roadmap)

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Can you help me get started with Qpid?

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Have a look at our Getting Started Guide

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How do I install the Qpid broker ?

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Please follow the instructions provided on our Getting Started Guide.

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How do I run the Qpid broker ?

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The broker comes with a script for unix/linux/cygwin called qpid-server, which can be found in the bin directory of the installed package. This command can be executed without any paramters and will then use the default configuration file provided on install.

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For more information on running the broker please see our Getting Started page.

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How can I create a connection using a URL ?

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The format for connection URL in QPID is as follows:

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The default failover setup will automatically retry each broker once after a failed connection. If the brokerlist contains more than one server then these servers are tried in a round robin. Details on how to modifiy this behaviour will follow soon !

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How do I represent a JMS Destination string with QPID ?

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Queues

A queue can be created in QPID using the following URL format.

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The topic subscription may only contain the letters A-Z and a-z and digits 0-9.

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The

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topic

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subscription

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is

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formed

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from

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a

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series

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of

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words

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that

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may

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only

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contain

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the

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letters

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A-Z

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and

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a-z

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and

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digits

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0-9.

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The

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words

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are

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delimited

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by

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dots.

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Each

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dot

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represents

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a

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new

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level.

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For

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example:

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stocks.nyse.ibm

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Wildcards

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can

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be

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used

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on

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subscription

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with

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the

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following

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meaning.

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• match

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• a

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• single

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• level

...

• 
  # match zero or more levels

For example:
With two clients
1 - stocks.*.ibm

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2

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-

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stocks.#.ibm

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Publishing stocks.nyse.ibm

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will

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be

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received

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by

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both

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clients

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but

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stocks.ibm

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and

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stocks.world.us.ibm

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will

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only

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be

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received

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by

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client

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2.

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The topic currently does not support wild cards.

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How do I connect to the broker using JNDI ?

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see How to use JNDI

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I'm using Spring and Weblogic - can you help me with the configuration for moving over to Qpid ?

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Here is a donated Spring configuration file appContext.zip which shows the config for Qpid side by side with Weblogic. HtH !

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How do I configure the logging level for Qpid ?

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The system property

amqj.logging.level

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The log level for the broker defaults to INFO if the env variable is not set, but you may find that your log4j properties affect this. Setting the property noted above should address this.

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How can I configure the broker ?

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The broker configuration is contained in the <installed-dir>/etc/config.xml file. You can copy and edit this file and then specify your own configuration file as a parameter to the startup script using the -c flag i.e. qpid-server -c <your_config_file's_path>

For more detailed information on configuration, please see Qpid Design - Configuration

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How can I change the port the broker uses at runtime ?

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The broker defaults to use port 5672 at startup.

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For more detailed information on configuration, please see Qpid Design - Configuration

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What command line options can I pass into the qpid-server script ?

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The following options are available:

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For more detailed information on configuration, please see Qpid Design - Configuration

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toggle-cloak:id=q13} How do I authenticate with the broker ? What user id & password should I use ?

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You should login as user guest with password guest

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How do I create queues that will always be instantiated at broker startup ?

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You can configure queues which will be created at broker startup by tailoring a copy of the virtualhosts.xml file provided in the installed qpid-version/etc directory.

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You can then pass this amended config.xml into the broker at startup using the -c flag i.e.
qpid-server -c <path>/config.xml

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How do I contact the Qpid team ?

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For now, subscribe to our qpid-dev@incubator.apache.com list (email qpid-dev-subscribe@incubator.apache.com). A users list is expected shortly !

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