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The queue behaves as a normal FIFO queue with the - exception that when a message is enqueued, any other message in the - queue with the same value in the key header is removed and discarded. - Thus, for any given key value, the queue holds only the most recent - message. - </p><p> - The following example illustrates the operation of a Last Value Queue. - The example shows an empty queue with no consumers and a sequence of - produced messages. The numbers represent the key for each message. - </p><pre class="programlisting"> - <empty queue> - 1 => - 1 - 2 => - 1 2 - 3 => - 1 2 3 - 4 => - 1 2 3 4 - 2 => - 1 3 4 2 - 1 => - 3 4 2 1 - </pre><p> - Note that the first four messages are enqueued normally in FIFO order. - The fifth message has key '2' and is also enqueued on the tail of the - queue. However the message already in the queue with the same key is - discarded. - </p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p> - If the set of keys used in the messages in a LVQ is constrained, the - number of messages in the queue shall not exceed the number of - distinct keys in use. - </p></div><p> - </p><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="LVQ-UnderstandingLVQ-UseCases"></a>1.6.1.1. Common Use-Cases</h4></div></div></div><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p> - LVQ with zero or one consuming subscriptions - In this case, if - the consumer drops momentarily or is slower than the producer(s), - it will only receive current information relative to the message - keys. - </p></li><li class="listitem"><p> - LVQ with zero or more browsing subscriptions - A browsing consumer - can subscribe to the LVQ and get an immediate dump of all of the - "current" messages and track updates thereafter. Any number of - independent browsers can subscribe to the same LVQ with the same - effect. Since messages are never consumed, they only disappear - when replaced with a newer message with the same key or when their - TTL expires. - </p></li></ul></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="LVQ-Creating"></a>1.6.2. Creating a Last Value Queue</h3></div></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="LVQ-Creating-Address"></a>1.6.2.1. Using Addressing Syntax</h4></div></div></div><p> - A LVQ may be created using directives in the API's address syntax. - The important argument is "qpid.last_value_queue_key". The following - Python example shows how a producer of stock price updates can create - a LVQ to hold the latest stock prices for each ticker symbol. The - message header used to hold the ticker symbol is called "ticker". - </p><pre class="programlisting"> - conn = Connection(url) - conn.open() - sess = conn.session() - tx = sess.sender("prices;{create:always, node:{type:queue, x-declare:{arguments:{'qpid.last_value_queue_key':'ticker'}}}}") - </pre></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="LVQ-Creating-Tool"></a>1.6.2.2. Using qpid-config</h4></div></div></div><p> - The same LVQ as shown in the previous example can be created using the - qpid-config utility: - </p><pre class="programlisting"> - $ qpid-config add queue prices --lvq-key ticker - </pre></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="LVQ-Example"></a>1.6.3. LVQ Example</h3></div></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="LVQ-Example-Sender"></a>1.6.3.1. LVQ Sender</h4></div></div></div><pre class="programlisting"> - from qpid.messaging import Connection, Message - - def send(sender, key, message): - message.properties["ticker"] = key - sender.send(message) - - conn = Connection("localhost") - conn.open() - sess = conn.session() - tx = sess.sender("prices;{create:always, node:{type:queue,x-declare:{arguments:{'qpid.last_value_queue_key':ticker}}}}") - - msg = Message("Content") - send(tx, "key1", msg); - send(tx, "key2", msg); - send(tx, "key3", msg); - send(tx, "key4", msg); - send(tx, "key2", msg); - send(tx, "key1", msg); - - conn.close() - </pre></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="LVQ-Example-Receiver"></a>1.6.3.2. LVQ Browsing Receiver</h4></div></div></div><pre class="programlisting"> - from qpid.messaging import Connection, Message - - conn = Connection("localhost") - conn.open() - sess = conn.session() - rx = sess.receiver("prices;{mode:browse}") - - while True: - msg = rx.fetch() - sess.acknowledge() - print msg - </pre></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="LVQ-Deprecated"></a>1.6.4. Deprecated LVQ Modes</h3></div></div></div><p> - There are two legacy modes (still implemented as of Qpid 0.14) - controlled by the qpid.last_value_queue and - qpid.last_value_queue_no_browse argument values. These modes are - deprecated and should not be used. - </p></div></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="chap-Messaging_User_Guide-Security.html">Prev</a> </td><td align="center" width="20%"><a accesskey="u" href="ch01.html">Up</a></td><td align="right" width="40%"> <a accesskey="n" href="queue-state-replication.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">1.5. Security </td><td align="center" width="20%"><a accesskey="h" href="index.html">Home</a></td><td align="right" valign="top" width="40%"> 1.7.  - Queue State Replication - </td></tr></table></div></div> - - <hr/> - - <ul id="-apache-navigation"> - <li><a href="http://www.apache.org/">Apache</a></li> - <li><a href="http://www.apache.org/licenses/">License</a></li> - <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li> - <li><a href="http://www.apache.org/foundation/thanks.html">Thanks!</a></li> - <li><a href="/security.html">Security</a></li> - <li><a href="http://www.apache.org/"><img id="-apache-feather" width="48" height="14" src="" alt="Apache"/></a></li> - </ul> - - <p id="-legal"> - Apache Qpid, Messaging built on AMQP; Copyright © 2015 - The Apache Software Foundation; Licensed under - the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache - License, Version 2.0</a>; Apache Qpid, Qpid, Qpid Proton, - Proton, Apache, the Apache feather logo, and the Apache Qpid - project logo are trademarks of The Apache Software - Foundation; All other marks mentioned may be trademarks or - registered trademarks of their respective owners - </p> - </div> - </div> - </div> - </body> -</html>
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Qpid Management Framework - </h2></div></div></div><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p> - <a class="xref" href="ch02s02.html#QpidManagementFramework-WhatIsQMF" title="2.2.1.  What Is QMF">Section 2.2.1, “ - What Is QMF - ”</a> - </p></li><li class="listitem"><p> - <a class="xref" href="ch02s02.html#QpidManagementFramework-GettingStartedwithQMF" title="2.2.2.  Getting Started with QMF">Section 2.2.2, “ - Getting - Started with QMF - ”</a> - </p></li><li class="listitem"><p> - <a class="xref" href="ch02s02.html#QpidManagementFramework-QMFConcepts" title="2.2.3.  QMF Concepts">Section 2.2.3, “ - QMF Concepts - ”</a> - </p></li><li class="listitem"><p> - </p><div class="itemizedlist"><ul class="itemizedlist" type="circle"><li class="listitem"><p> - <a class="xref" href="ch02s02.html#QpidManagementFramework-Console-2CAgent-2CandBroker" title="2.2.3.1.  Console, Agent, and Broker">Section 2.2.3.1, “ - Console, - Agent, and Broker - ”</a> - </p></li><li class="listitem"><p> - <a class="xref" href="ch02s02.html#QpidManagementFramework-Schema" title="2.2.3.2.  Schema">Section 2.2.3.2, “ - Schema - ”</a> - </p></li><li class="listitem"><p> - <a class="xref" href="ch02s02.html#QpidManagementFramework-ClassKeysandClassVersioning" title="2.2.3.3.  Class Keys and Class Versioning">Section 2.2.3.3, “ - Class - Keys and Class Versioning - ”</a> - </p></li></ul></div><p> - </p></li><li class="listitem"><p> - <a class="xref" href="ch02s02.html#QpidManagementFramework-TheQMFProtocol" title="2.2.4.  The QMF Protocol">Section 2.2.4, “ - The QMF - Protocol - ”</a> - </p></li><li class="listitem"><p> - <a class="xref" href="ch02s02.html#QpidManagementFramework-HowtoWriteaQMFConsole" title="2.2.5.  How to Write a QMF Console">Section 2.2.5, “ - How - to Write a QMF Console - ”</a> - </p></li><li class="listitem"><p> - <a class="xref" href="ch02s02.html#QpidManagementFramework-HowtoWriteaQMFAgent" title="2.2.6.  How to Write a QMF Agent">Section 2.2.6, “ - How to - Write a QMF Agent - ”</a> - </p></li></ul></div><p> - Please visit the <a class="xref" href="">???</a> for information - about the future of QMF. - </p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="QpidManagementFramework-WhatIsQMF"></a>2.2.1.  - What Is QMF - </h3></div></div></div><p> - QMF (Qpid Management Framework) is a general-purpose management - bus built on Qpid Messaging. It takes advantage of the - scalability, security, and rich capabilities of Qpid to provide - flexible and easy-to-use manageability to a large set of - applications. - </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="QpidManagementFramework-GettingStartedwithQMF"></a>2.2.2.  - Getting - Started with QMF - </h3></div></div></div><p> - QMF is used through two primary APIs. The <span class="emphasis"><em>console</em></span> API is - used for console applications that wish to access and manipulate - manageable components through QMF. The <span class="emphasis"><em>agent</em></span> API is used - for application that wish to be managed through QMF. - </p><p> - The fastest way to get started with QMF is to work through the - "How To" tutorials for consoles and agents. For a deeper - understanding of what is happening in the tutorials, it is - recommended that you look at the <span class="emphasis"><em>Qmf Concepts</em></span> section. - </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="QpidManagementFramework-QMFConcepts"></a>2.2.3.  - QMF Concepts - </h3></div></div></div><p> - This section introduces important concepts underlying QMF. - </p><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="QpidManagementFramework-Console-2CAgent-2CandBroker"></a>2.2.3.1.  - Console, - Agent, and Broker - </h4></div></div></div><p> - The major architectural components of QMF are the Console, the - Agent, and the Broker. Console components are the "managing" - components of QMF and agent components are the "managed" parts. - The broker is a central (possibly distributed, clustered and - fault-tolerant) component that manages name spaces and caches - schema information. - </p><p> - A console application may be a command-line utility, a - three-tiered web-based GUI, a collection and storage device, a - specialized application that monitors and reacts to events and - conditions, or anything else somebody wishes to develop that uses - QMF management data. - </p><p> - An agent application is any application that has been enhanced to - allow itself to be managed via QMF. - </p><pre class="programlisting"> - +-------------+ +---------+ +---------------+ +-------------------+ - | CLI utility | | Web app | | Audit storage | | Event correlation | - +-------------+ +---------+ +---------------+ +-------------------+ - ^ ^ ^ ^ | - | | | | | - v v v v v - +---------------------------------------------------------------------------------+ - | Qpid Messaging Bus (with QMF Broker capability) | - +---------------------------------------------------------------------------------+ - ^ ^ ^ - | | | - v v v - +----------------+ +----------------+ +----------------+ - | Manageable app | | Manageable app | | Manageable app | - +----------------+ +----------------+ +----------------+ -</pre><p> - In the above diagram, the <span class="emphasis"><em>Manageable apps</em></span> are agents, - the <span class="emphasis"><em>CLI utility</em></span>, <span class="emphasis"><em>Web app</em></span>, and <span class="emphasis"><em>Audit - storage</em></span> are consoles, and <span class="emphasis"><em>Event correlation</em></span> is both - a console and an agent because it can create events based on the - aggregation of what it sees. - </p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="QpidManagementFramework-Schema"></a>2.2.3.2.  - Schema - </h4></div></div></div><p> - A <span class="emphasis"><em>schema</em></span> describes the structure of management data. - Each <span class="emphasis"><em>agent</em></span> provides a schema that describes its - management model including the object classes, methods, events, - etc. that it provides. In the current QMF distribution, the - agent's schema is codified in an XML document. In the near - future, there will also be ways to programatically create QMF - schemata. - </p><div class="section"><div class="titlepage"><div><div><h5 class="title"><a id="QpidManagementFramework-Package"></a> - Package - </h5></div></div></div><p> - Each agent that exports a schema identifies itself using a - <span class="emphasis"><em>package</em></span> name. The package provides a unique namespace - for the classes in the agent's schema that prevent collisions - with identically named classes in other agents' schemata. - </p><p> - Package names are in "reverse domain name" form with levels of - hierarchy separated by periods. For example, the Qpid messaging - broker uses package "org.apache.qpid.broker" and the Access - Control List plugin for the broker uses package - "org.apache.qpid.acl". In general, the package name should be the - reverse of the internet domain name assigned to the organization - that owns the agent software followed by identifiers to uniquely - identify the agent. - </p><p> - The XML document for a package's schema uses an enclosing - <schema> tag. For example: - </p><pre class="programlisting"> -<schema package="org.apache.qpid.broker"> - -</schema> -</pre></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a id="QpidManagementFramework-ObjectClasses"></a> - Object - Classes - </h5></div></div></div><p> - <span class="emphasis"><em>Object classes</em></span> define types for manageable objects. The - agent may create and destroy objects which are instances of - object classes in the schema. An object class is defined in the - XML document using the <class> tag. An object class is - composed of properties, statistics, and methods. - </p><pre class="programlisting"> - <class name="Exchange"> - <property name="vhostRef" type="objId" references="Vhost" access="RC" index="y" parentRef="y"/> - <property name="name" type="sstr" access="RC" index="y"/> - <property name="type" type="sstr" access="RO"/> - <property name="durable" type="bool" access="RC"/> - <property name="arguments" type="map" access="RO" desc="Arguments supplied in exchange.declare"/> - - <statistic name="producerCount" type="hilo32" desc="Current producers on exchange"/> - <statistic name="bindingCount" type="hilo32" desc="Current bindings"/> - <statistic name="msgReceives" type="count64" desc="Total messages received"/> - <statistic name="msgDrops" type="count64" desc="Total messages dropped (no matching key)"/> - <statistic name="msgRoutes" type="count64" desc="Total routed messages"/> - <statistic name="byteReceives" type="count64" desc="Total bytes received"/> - <statistic name="byteDrops" type="count64" desc="Total bytes dropped (no matching key)"/> - <statistic name="byteRoutes" type="count64" desc="Total routed bytes"/> - </class> -</pre></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a id="QpidManagementFramework-PropertiesandStatistics"></a> - Properties - and Statistics - </h5></div></div></div><p> - <property> and <statistic> tags must be placed within - <schema> and </schema> tags. - </p><p> - Properties, statistics, and methods are the building blocks of an - object class. Properties and statistics are both object - attributes, though they are treated differently. If an object - attribute is defining, seldom or never changes, or is large in - size, it should be defined as a <span class="emphasis"><em>property</em></span>. If an - attribute is rapidly changing or is used to instrument the object - (counters, etc.), it should be defined as a <span class="emphasis"><em>statistic</em></span>. - </p><p> - The XML syntax for <property> and <statistic> have - the following XML-attributes: - </p><div class="table"><a id="idm140312019165632"></a><p class="title"><strong>Table 2.1. XML Attributes for QMF Properties and Statistics</strong></p><div class="table-contents"><table border="1" summary="XML Attributes for QMF Properties and Statistics"><colgroup><col /><col /><col /><col /></colgroup><tbody><tr><td> - Attribute - </td><td> - <property> - </td><td> - <statistic> - </td><td> - Meaning - </td></tr><tr><td> - name - </td><td> - Y - </td><td> - Y - </td><td> - The name of the attribute - </td></tr><tr><td> - type - </td><td> - Y - </td><td> - Y - </td><td> - The data type of the attribute - </td></tr><tr><td> - unit - </td><td> - Y - </td><td> - Y - </td><td> - Optional unit name - use the singular (i.e. MByte) - </td></tr><tr><td> - desc - </td><td> - Y - </td><td> - Y - </td><td> - Description to annotate the attribute - </td></tr><tr><td> - references - </td><td> - Y - </td><td> -   - </td><td> - If the type is "objId", names the referenced class - </td></tr><tr><td> - access - </td><td> - Y - </td><td> -   - </td><td> - Access rights (RC, RW, RO) - </td></tr><tr><td> - index - </td><td> - Y - </td><td> -   - </td><td> - "y" if this property is used to uniquely identify the - object. There may be more than one index property in a - class - </td></tr><tr><td> - parentRef - </td><td> - Y - </td><td> -   - </td><td> - "y" if this property references an object in which this - object is in a child-parent relationship. - </td></tr><tr><td> - optional - </td><td> - Y - </td><td> -   - </td><td> - "y" if this property is optional (i.e. may be - NULL/not-present) - </td></tr><tr><td> - min - </td><td> - Y - </td><td> -   - </td><td> - Minimum value of a numeric attribute - </td></tr><tr><td> - max - </td><td> - Y - </td><td> -   - </td><td> - Maximum value of a numeric attribute - </td></tr><tr><td> - maxLen - </td><td> - Y - </td><td> -   - </td><td> - Maximum length of a string attribute - </td></tr></tbody></table></div></div><br class="table-break" /></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a id="QpidManagementFramework-Methods"></a> - Methods - </h5></div></div></div><p> - <method> tags must be placed within <schema> and - </schema> tags. - </p><p> - A <span class="emphasis"><em>method</em></span> is an invokable function to be performed on - instances of the object class (i.e. a Remote Procedure Call). A - <method> tag has a name, an optional description, and - encloses zero or more arguments. Method arguments are defined by - the <arg> tag and have a name, a type, a direction, and an - optional description. The argument direction can be "I", "O", or - "IO" indicating input, output, and input/output respectively. An - example: - </p><pre class="programlisting"> - <method name="echo" desc="Request a response to test the path to the management broker"> - <arg name="sequence" dir="IO" type="uint32"/> - <arg name="body" dir="IO" type="lstr"/> - </method> -</pre></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a id="QpidManagementFramework-EventClasses"></a> - Event Classes - </h5></div></div></div><p /></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a id="QpidManagementFramework-DataTypes"></a> - Data Types - </h5></div></div></div><p> - Object attributes, method arguments, and event arguments have - data types. The data types are based on the rich data typing - system provided by the AMQP messaging protocol. The following - table describes the data types available for QMF: - </p><div class="table"><a id="idm140312023937936"></a><p class="title"><strong>Table 2.2. QMF Datatypes</strong></p><div class="table-contents"><table border="1" summary="QMF Datatypes"><colgroup><col /><col /></colgroup><tbody><tr><td> - QMF Type - </td><td> - Description - </td></tr><tr><td> - REF - </td><td> - QMF Object ID - Used to reference another QMF object. - </td></tr><tr><td> - U8 - </td><td> - 8-bit unsigned integer - </td></tr><tr><td> - U16 - </td><td> - 16-bit unsigned integer - </td></tr><tr><td> - U32 - </td><td> - 32-bit unsigned integer - </td></tr><tr><td> - U64 - </td><td> - 64-bit unsigned integer - </td></tr><tr><td> - S8 - </td><td> - 8-bit signed integer - </td></tr><tr><td> - S16 - </td><td> - 16-bit signed integer - </td></tr><tr><td> - S32 - </td><td> - 32-bit signed integer - </td></tr><tr><td> - S64 - </td><td> - 64-bit signed integer - </td></tr><tr><td> - BOOL - </td><td> - Boolean - True or False - </td></tr><tr><td> - SSTR - </td><td> - Short String - String of up to 255 bytes - </td></tr><tr><td> - LSTR - </td><td> - Long String - String of up to 65535 bytes - </td></tr><tr><td> - ABSTIME - </td><td> - Absolute time since the epoch in nanoseconds (64-bits) - </td></tr><tr><td> - DELTATIME - </td><td> - Delta time in nanoseconds (64-bits) - </td></tr><tr><td> - FLOAT - </td><td> - Single precision floating point number - </td></tr><tr><td> - DOUBLE - </td><td> - Double precision floating point number - </td></tr><tr><td> - UUID - </td><td> - UUID - 128 bits - </td></tr><tr><td> - FTABLE - </td><td> - Field-table - std::map in C++, dictionary in Python - </td></tr></tbody></table></div></div><br class="table-break" /><p> - In the XML schema definition, types go by different names and - there are a number of special cases. This is because the XML - schema is used in code-generation for the agent API. It provides - options that control what kind of accessors are generated for - attributes of different types. The following table enumerates the - types available in the XML format, which QMF types they map to, - and other special handling that occurs. - </p><div class="table"><a id="idm140312021425120"></a><p class="title"><strong>Table 2.3. XML Schema Mapping for QMF Types</strong></p><div class="table-contents"><table border="1" summary="XML Schema Mapping for QMF Types"><colgroup><col /><col /><col /><col /></colgroup><tbody><tr><td> - XML Type - </td><td> - QMF Type - </td><td> - Accessor Style - </td><td> - Special Characteristics - </td></tr><tr><td> - objId - </td><td> - REF - </td><td> - Direct (get, set) - </td><td> -   - </td></tr><tr><td> - uint8,16,32,64 - </td><td> - U8,16,32,64 - </td><td> - Direct (get, set) - </td><td> -   - </td></tr><tr><td> - int8,16,32,64 - </td><td> - S8,16,32,64 - </td><td> - Direct (get, set) - </td><td> -   - </td></tr><tr><td> - bool - </td><td> - BOOL - </td><td> - Direct (get, set) - </td><td> -   - </td></tr><tr><td> - sstr - </td><td> - SSTR - </td><td> - Direct (get, set) - </td><td> -   - </td></tr><tr><td> - lstr - </td><td> - LSTR - </td><td> - Direct (get, set) - </td><td> -   - </td></tr><tr><td> - absTime - </td><td> - ABSTIME - </td><td> - Direct (get, set) - </td><td> -   - </td></tr><tr><td> - deltaTime - </td><td> - DELTATIME - </td><td> - Direct (get, set) - </td><td> -   - </td></tr><tr><td> - float - </td><td> - FLOAT - </td><td> - Direct (get, set) - </td><td> -   - </td></tr><tr><td> - double - </td><td> - DOUBLE - </td><td> - Direct (get, set) - </td><td> -   - </td></tr><tr><td> - uuid - </td><td> - UUID - </td><td> - Direct (get, set) - </td><td> -   - </td></tr><tr><td> - map - </td><td> - FTABLE - </td><td> - Direct (get, set) - </td><td> -   - </td></tr><tr><td> - hilo8,16,32,64 - </td><td> - U8,16,32,64 - </td><td> - Counter (inc, dec) - </td><td> - Generates value, valueMin, valueMax - </td></tr><tr><td> - count8,16,32,64 - </td><td> - U8,16,32,64 - </td><td> - Counter (inc, dec) - </td><td> -   - </td></tr><tr><td> - mma32,64 - </td><td> - U32,64 - </td><td> - Direct - </td><td> - Generates valueMin, valueMax, valueAverage, valueSamples - </td></tr><tr><td> - mmaTime - </td><td> - DELTATIME - </td><td> - Direct - </td><td> - Generates valueMin, valueMax, valueAverage, valueSamples - </td></tr></tbody></table></div></div><br class="table-break" /><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Important</h3><p> - When writing a schema using the XML format, types used in - <property> or <arg> must be types that have - <span class="emphasis"><em>Direct</em></span> accessor style. Any type may be used in - <statistic> tags. - </p></div></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="QpidManagementFramework-ClassKeysandClassVersioning"></a>2.2.3.3.  - Class - Keys and Class Versioning - </h4></div></div></div><p /></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="QpidManagementFramework-TheQMFProtocol"></a>2.2.4.  - The QMF - Protocol - </h3></div></div></div><p> - The QMF protocol defines the message formats and communication - patterns used by the different QMF components to communicate with - one another. - </p><p> - A description of the current version of the QMF protocol can be - found at <a class="xref" href="">???</a>. - </p><p> - A proposal for an updated protocol based on map-messages is in - progress and can be found at <a class="xref" href="">???</a>. - </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="QpidManagementFramework-HowtoWriteaQMFConsole"></a>2.2.5.  - How - to Write a QMF Console - </h3></div></div></div><p> - Please see the <a class="xref" href="">???</a> for information about using the console API with - Python. - </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="QpidManagementFramework-HowtoWriteaQMFAgent"></a>2.2.6.  - How to - Write a QMF Agent - </h3></div></div></div><p /></div></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="chapter-Managing-CPP-Broker.html">Prev</a> </td><td align="center" width="20%"><a accesskey="u" href="chapter-Managing-CPP-Broker.html">Up</a></td><td align="right" width="40%"> <a accesskey="n" href="ch02s03.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">Chapter 2.  - Managing the AMQP Messaging Broker -  </td><td align="center" width="20%"><a accesskey="h" href="index.html">Home</a></td><td align="right" valign="top" width="40%"> 2.3.  - QMF Python Console Tutorial - </td></tr></table></div></div> - - <hr/> - - <ul id="-apache-navigation"> - <li><a href="http://www.apache.org/">Apache</a></li> - <li><a href="http://www.apache.org/licenses/">License</a></li> - <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li> - <li><a href="http://www.apache.org/foundation/thanks.html">Thanks!</a></li> - <li><a href="/security.html">Security</a></li> - <li><a href="http://www.apache.org/"><img id="-apache-feather" width="48" height="14" src="" alt="Apache"/></a></li> - </ul> - - <p id="-legal"> - Apache Qpid, Messaging built on AMQP; Copyright © 2015 - The Apache Software Foundation; Licensed under - the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache - License, Version 2.0</a>; Apache Qpid, Qpid, Qpid Proton, - Proton, Apache, the Apache feather logo, and the Apache Qpid - project logo are trademarks of The Apache Software - Foundation; All other marks mentioned may be trademarks or - registered trademarks of their respective owners - </p> - </div> - </div> - </div> - </body> -</html> --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@qpid.apache.org For additional commands, e-mail: commits-h...@qpid.apache.org