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Posted to commits@qpid.apache.org by jr...@apache.org on 2016/09/06 17:00:12 UTC
[49/51] [partial] qpid-site git commit: QPID-7353: Update for the
Qpid C++ 1.35.0 release
http://git-wip-us.apache.org/repos/asf/qpid-site/blob/eff0fe55/content/releases/qpid-cpp-1.35.0/cpp-broker/book/ch01.html
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+
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+
+ <div id="-middle-content">
+ <div class="docbook"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">Chapter 1. 
+ Running the AMQP Messaging Broker
+ </th></tr><tr><td align="left" width="20%"><a accesskey="p" href="pr01.html">Prev</a> </td><th align="center" width="60%"> </th><td align="right" width="20%"> <a accesskey="n" href="ch01s02.html">Next</a></td></tr></table><hr /></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a id="idm140173359789232"></a>Chapter 1. 
+ Running the AMQP Messaging Broker
+ </h1></div></div></div><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="section"><a href="ch01.html#section-Running-a-Qpid-CPP-Broker">1.1.
+ Running a Qpid C++ Broker
+ </a></span></dt><dd><dl><dt><span class="section"><a href="ch01.html#RASC-BuildingtheCppBrokerandClientLibraries">1.1.1.
+ Building the
+ C++ Broker and Client Libraries
+ </a></span></dt><dt><span class="section"><a href="ch01.html#RASC-RunningtheCppBroker">1.1.2.
+ Running the C++ Broker
+ </a></span></dt><dt><span class="section"><a href="ch01.html#RASC-Mostcommonquestionsgettingqpiddrunning">1.1.3.
+ Most
+ common questions getting qpidd running
+ </a></span></dt><dt><span class="section"><a href="ch01.html#RASC-Authentication">1.1.4.
+ Authentication
+ </a></span></dt><dt><span class="section"><a href="ch01.html#RASC-Slightlymorecomplexconfiguration">1.1.5.
+ Slightly more
+ complex configuration
+ </a></span></dt><dt><span class="section"><a href="ch01.html#RASC-Loadingextramodules">1.1.6.
+ Loading extra modules
+ </a></span></dt><dt><span class="section"><a href="ch01.html#RASC-message-timestamps">1.1.7. Timestamping Received Messages</a></span></dt><dt><span class="section"><a href="ch01.html#RASC-logging-options">1.1.8. Logging Options</a></span></dt></dl></dd><dt><span class="section"><a href="ch01s02.html">1.2.
+ Cheat Sheet for configuring Queue Options
+ </a></span></dt><dd><dl><dt><span class="section"><a href="ch01s02.html#CheatSheetforconfiguringQueueOptions-ConfiguringQueueOptions">1.2.1.
+ Configuring
+ Queue Options
+ </a></span></dt></dl></dd><dt><span class="section"><a href="ch01s03.html">1.3.
+ Cheat Sheet for configuring Exchange Options
+ </a></span></dt><dd><dl><dt><span class="section"><a href="ch01s03.html#CheatSheetforconfiguringExchangeOptions-ConfiguringExchangeOptions">1.3.1.
+ Configuring Exchange Options
+ </a></span></dt></dl></dd><dt><span class="section"><a href="chap-Messaging_User_Guide-Broker_Federation.html">1.4. Broker Federation</a></span></dt><dd><dl><dt><span class="section"><a href="chap-Messaging_User_Guide-Broker_Federation.html#sect-Messaging_User_Guide-Broker_Federation-Message_Routes">1.4.1. Message Routes</a></span></dt><dt><span class="section"><a href="chap-Messaging_User_Guide-Broker_Federation.html#sect-Messaging_User_Guide-Broker_Federation-Federation_Topologies">1.4.2. Federation Topologies</a></span></dt><dt><span class="section"><a href="chap-Messaging_User_Guide-Broker_Federation.html#sect-Messaging_User_Guide-Broker_Federation-Federation_among_High_Availability_Message_Clusters">1.4.3. Federation among High Availability Message Clusters</a></span></dt><dt><span class="section"><a href="chap-Messaging_User_Guide-Broker_Federation.html#sect-Messaging_User_Guide-Broker_Federation-The_qpid_route_Utility">1.4.4. The qpid-route Utility</a></span></dt><dt><spa
n class="section"><a href="chap-Messaging_User_Guide-Broker_Federation.html#federation-broker-options">1.4.5. Broker options affecting federation</a></span></dt></dl></dd><dt><span class="section"><a href="chap-Messaging_User_Guide-Security.html">1.5. Security</a></span></dt><dd><dl><dt><span class="section"><a href="chap-Messaging_User_Guide-Security.html#sect-Messaging_User_Guide-Security-User_Authentication">1.5.1. User Authentication</a></span></dt><dt><span class="section"><a href="chap-Messaging_User_Guide-Security.html#sect-Messaging_User_Guide-Security-Authorization">1.5.2. Authorization</a></span></dt><dt><span class="section"><a href="chap-Messaging_User_Guide-Security.html#sect-Messaging_User_Guide-Authorization-Specifying_ACL_Quotas">1.5.3. User Connection and Queue Quotas</a></span></dt><dt><span class="section"><a href="chap-Messaging_User_Guide-Security.html#sect-Messaging_User_Guide-Security-Encryption_using_SSL">1.5.4. Encryption using SSL</a></span></dt></dl></dd><
dt><span class="section"><a href="ch01s06.html">1.6. LVQ - Last Value Queue</a></span></dt><dd><dl><dt><span class="section"><a href="ch01s06.html#LVQ-UnderstandingLVQ">1.6.1. Understanding LVQ</a></span></dt><dt><span class="section"><a href="ch01s06.html#LVQ-Creating">1.6.2. Creating a Last Value Queue</a></span></dt><dt><span class="section"><a href="ch01s06.html#LVQ-Example">1.6.3. LVQ Example</a></span></dt><dt><span class="section"><a href="ch01s06.html#LVQ-Deprecated">1.6.4. Deprecated LVQ Modes</a></span></dt></dl></dd><dt><span class="section"><a href="queue-state-replication.html">1.7.
+ Queue State Replication
+ </a></span></dt><dd><dl><dt><span class="section"><a href="queue-state-replication.html#queuestatereplication-AsynchronousReplicationofQueueState">1.7.1.
+ Asynchronous
+ Replication of Queue State
+ </a></span></dt></dl></dd><dt><span class="section"><a href="producer-flow-control.html">1.8.
+ Producer Flow Control
+ </a></span></dt><dd><dl><dt><span class="section"><a href="producer-flow-control.html#producerflowcontrol-Overview">1.8.1.
+ Overview
+ </a></span></dt><dt><span class="section"><a href="producer-flow-control.html#producerflowcontrol-UserInterface">1.8.2.
+ User Interface
+ </a></span></dt></dl></dd><dt><span class="section"><a href="AMQP-Compatibility.html">1.9.
+ AMQP compatibility
+ </a></span></dt><dd><dl><dt><span class="section"><a href="AMQP-Compatibility.html#AMQPcompatibility-AMQPCompatibilityofQpidreleases-3A">1.9.1.
+ AMQP
+ Compatibility of Qpid releases:
+ </a></span></dt><dt><span class="section"><a href="AMQP-Compatibility.html#AMQPcompatibility-InteroptablebyAMQPspecificationversion">1.9.2.
+ Interop
+ table by AMQP specification version
+ </a></span></dt></dl></dd><dt><span class="section"><a href="QpidInteroperabilityDocumentation-QpidInteroperabilityDocumentation.html">1.10. Qpid Interoperability Documentation</a></span></dt><dd><dl><dt><span class="section"><a href="QpidInteroperabilityDocumentation-QpidInteroperabilityDocumentation.html#QpidInteroperabilityDocumentation-SASL">1.10.1.
+ SASL
+ </a></span></dt></dl></dd><dt><span class="section"><a href="Using-message-groups.html">1.11.
+ Using Message Groups
+ </a></span></dt><dd><dl><dt><span class="section"><a href="Using-message-groups.html#usingmessagegroups-Overview">1.11.1.
+ Overview
+ </a></span></dt><dt><span class="section"><a href="Using-message-groups.html#usingmessagegroups-GroupingMessages">1.11.2.
+ Grouping Messages
+ </a></span></dt><dt><span class="section"><a href="Using-message-groups.html#usingmessagegroups-BrokerRole">1.11.3.
+ The Role of the Broker
+ </a></span></dt><dt><span class="section"><a href="Using-message-groups.html#usingmessagegroups-ConsumerGuide">1.11.4.
+ Well Behaved Consumers
+ </a></span></dt><dt><span class="section"><a href="Using-message-groups.html#usingmessagegroups-BrokerConfig">1.11.5.
+ Broker Configuration
+ </a></span></dt></dl></dd><dt><span class="section"><a href="chapter-ha.html">1.12. Active-Passive Messaging Clusters</a></span></dt><dd><dl><dt><span class="section"><a href="chapter-ha.html#ha-overview">1.12.1. Overview</a></span></dt><dt><span class="section"><a href="chapter-ha.html#ha-virtual-ip">1.12.2. Virtual IP Addresses</a></span></dt><dt><span class="section"><a href="chapter-ha.html#ha-broker-config">1.12.3. Configuring the Brokers</a></span></dt><dt><span class="section"><a href="chapter-ha.html#ha-rm">1.12.4. The Cluster Resource Manager</a></span></dt><dt><span class="section"><a href="chapter-ha.html#ha-rm-config">1.12.5. Configuring with <span class="command"><strong>rgmanager</strong></span> as resource manager</a></span></dt><dt><span class="section"><a href="chapter-ha.html#ha-broker-admin">1.12.6. Broker Administration Tools</a></span></dt><dt><span class="section"><a href="chapter-ha.html#ha-replicate-values">1.12.7. Controlling replication of queues and
exchanges</a></span></dt><dt><span class="section"><a href="chapter-ha.html#ha-failover">1.12.8. Client Connection and Fail-over</a></span></dt><dt><span class="section"><a href="chapter-ha.html#ha-security">1.12.9. Security and Access Control.</a></span></dt><dt><span class="section"><a href="chapter-ha.html#ha-other-rm">1.12.10. Integrating with other Cluster Resource Managers</a></span></dt><dt><span class="section"><a href="chapter-ha.html#ha-store">1.12.11. Using a message store in a cluster</a></span></dt><dt><span class="section"><a href="chapter-ha.html#ha-troubleshoot">1.12.12. Troubleshooting a cluster</a></span></dt></dl></dd><dt><span class="section"><a href="ha-queue-replication.html">1.13. Replicating Queues with the HA module</a></span></dt><dd><dl><dt><span class="section"><a href="ha-queue-replication.html#idm140173354836560">1.13.1. Replicating queues</a></span></dt><dt><span class="section"><a href="ha-queue-replication.html#idm140173356524352">1.13.2. Replicating
queues between clusters</a></span></dt></dl></dd></dl></div><div class="section"><div class="titlepage"><div><div><h2 class="title"><a id="section-Running-a-Qpid-CPP-Broker"></a>1.1. 
+ Running a Qpid C++ Broker
+ </h2></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="RASC-BuildingtheCppBrokerandClientLibraries"></a>1.1.1. 
+ Building the
+ C++ Broker and Client Libraries
+ </h3></div></div></div><p>
+ The root directory for the C++ distribution is named
+ qpidc-0.4. The README file in that directory gives
+ instructions for building the broker and client libraries. In
+ most cases you will do the following:
+ </p><pre class="programlisting">
+[qpidc-0.4]$ ./configure
+[qpidc-0.4]$ make
+</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="RASC-RunningtheCppBroker"></a>1.1.2. 
+ Running the C++ Broker
+ </h3></div></div></div><p>
+ Once you have built the broker and client libraries, you can
+ start the broker from the command line:
+ </p><pre class="programlisting">
+[qpidc-0.4]$ src/qpidd
+</pre><p>
+ Use the --daemon option to run the broker as a daemon
+ process:
+ </p><pre class="programlisting">
+[qpidc-0.4]$ src/qpidd --daemon
+</pre><p>
+ You can stop a running daemon with the --quit option:
+ </p><pre class="programlisting">
+[qpidc-0.4]$ src/qpidd --quit
+</pre><p>
+ You can see all available options with the --help option
+ </p><pre class="programlisting">
+[qpidc-0.4]$ src/qpidd --help
+</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="RASC-Mostcommonquestionsgettingqpiddrunning"></a>1.1.3. 
+ Most
+ common questions getting qpidd running
+ </h3></div></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="RASC-Errorwhenstartingbroker-3A-22nodatadirectory-22"></a>1.1.3.1. 
+ Error
+ when starting broker: "no data directory"
+ </h4></div></div></div><p>
+ The C++ Broker requires you to set a data directory or specify
+ --no-data-dir (see help for more details). The data
+ directory is used for the journal, so it is important when
+ reliability counts. Make sure your process has write permission
+ to the data directory.
+ </p><p>
+ The default location is
+ </p><pre class="programlisting">
+/lib/var/qpidd
+</pre><p>
+ An alternate location can be set with --data-dir
+ </p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="RASC-Errorwhenstartingbroker-3A-22thatprocessislocked-22"></a>1.1.3.2. 
+ Error
+ when starting broker: "that process is locked"
+ </h4></div></div></div><p>
+ Note that when qpidd starts it creates a lock file is data
+ directory are being used. If you have a un-controlled exit,
+ please mail
+ the trace from the core to the dev@qpid.apache.org mailing list.
+ To clear the lock run
+ </p><pre class="programlisting">
+./qpidd -q
+</pre><p>
+ It should also be noted that multiple brokers can be run on the
+ same host. To do so set alternate data directories for each qpidd
+ instance.
+ </p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="RASC-Usingaconfigurationfile"></a>1.1.3.3. 
+ Using a configuration
+ file
+ </h4></div></div></div><p>
+ Each option that can be specified on the command line can also be
+ specified in a configuration file. To see available options, use
+ --help on the command line:
+ </p><pre class="programlisting">
+./qpidd --help
+</pre><p>
+ A configuration file uses name/value pairs, one on each line. To
+ convert a command line option to a configuration file entry:
+ </p><p>
+ a.) remove the '--' from the beginning of the option.
+ b.) place a '=' between the option and the value (use
+ <span class="emphasis"><em>yes</em></span> or <span class="emphasis"><em>true</em></span> to enable options that take no
+ value when specified on the command line).
+ c.) place one option per line.
+ </p><p>
+ For instance, the --daemon option takes no value, the
+ --log-to-syslog option takes the values yes or
+ no. The following configuration file sets these two
+ options:
+ </p><pre class="programlisting">
+daemon=yes
+log-to-syslog=yes
+</pre></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="RASC-CanIuseanyLanguageclientwiththeCppBroker-3F"></a>1.1.3.4. 
+ Can I use
+ any Language client with the C++ Broker?
+ </h4></div></div></div><p>
+ Yes, all the clients work with the C++ broker; it is written in
+ C+<span class="emphasis"><em>, but uses the AMQP wire protocol. Any broker can be used
+ with any client that uses the same AMQP version. When running the
+ C</em></span>+ broker, it is highly recommended to run AMQP 0-10.
+ </p><p>
+ Note that JMS also works with the C++ broker.
+ </p></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="RASC-Authentication"></a>1.1.4. 
+ Authentication
+ </h3></div></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="RASC-Linux"></a>1.1.4.1. 
+ Linux
+ </h4></div></div></div><p>
+ The PLAIN authentication is done on a username+password, which is
+ stored in the sasldb_path file. Usernames and passwords can be
+ added to the file using the command:
+ </p><pre class="programlisting">
+saslpasswd2 -f /var/lib/qpidd/qpidd.sasldb -u <REALM> <USER>
+</pre><p>
+ The REALM is important and should be the same as the
+ --auth-realm
+ option to the broker. This lets the broker properly find the user
+ in
+ the sasldb file.
+ </p><p>
+ Existing user accounts may be listed with:
+ </p><pre class="programlisting">
+sasldblistusers2 -f /var/lib/qpidd/qpidd.sasldb
+</pre><p>
+ NOTE: The sasldb file must be readable by the user running the
+ qpidd daemon, and should be readable only by that user.
+ </p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="RASC-Windows"></a>1.1.4.2. 
+ Windows
+ </h4></div></div></div><p>
+ On Windows, the users are authenticated against the local
+ machine. You should add the appropriate users using the standard
+ Windows tools (Control Panel->User Accounts). To run many of
+ the examples, you will need to create a user "guest" with
+ password "guest".
+ </p><p>
+ If you cannot or do not want to create new users, you can run
+ without authentication by specifying the no-auth option to the
+ broker.
+ </p></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="RASC-Slightlymorecomplexconfiguration"></a>1.1.5. 
+ Slightly more
+ complex configuration
+ </h3></div></div></div><p>
+ The easiest way to get a full listing of the broker's options are
+ to use the --help command, run it locally for the latest set of
+ options. These options can then be set in the conf file for
+ convenience (see above)
+ </p><pre class="programlisting">
+./qpidd --help
+
+Usage: qpidd OPTIONS
+Options:
+ -h [ --help ] Displays the help message
+ -v [ --version ] Displays version information
+ --config FILE (/etc/qpidd.conf) Reads configuration from FILE
+
+Module options:
+ --module-dir DIR (/usr/lib/qpidd) Load all .so modules in this directory
+ --load-module FILE Specifies additional module(s) to be loaded
+ --no-module-dir Don't load modules from module directory
+
+Broker Options:
+ --data-dir DIR (/var/lib/qpidd) Directory to contain persistent data generated by the broker
+ --no-data-dir Don't use a data directory. No persistent
+ configuration will be loaded or stored
+ -p [ --port ] PORT (5672) Tells the broker to listen on PORT
+ --worker-threads N (3) Sets the broker thread pool size
+ --max-connections N (500) Sets the maximum allowed connections
+ --connection-backlog N (10) Sets the connection backlog limit for the
+ server socket
+ --staging-threshold N (5000000) Stages messages over N bytes to disk
+ -m [ --mgmt-enable ] yes|no (1) Enable Management
+ --mgmt-pub-interval SECONDS (10) Management Publish Interval
+ --ack N (0) Send session.ack/solicit-ack at least every
+ N frames. 0 disables voluntary ack/solitict
+ -ack
+
+Daemon options:
+ -d [ --daemon ] Run as a daemon.
+ -w [ --wait ] SECONDS (10) Sets the maximum wait time to initialize the
+ daemon. If the daemon fails to initialize, prints
+ an error and returns 1
+ -c [ --check ] Prints the daemon's process ID to stdout and
+ returns 0 if the daemon is running, otherwise
+ returns 1
+ -q [ --quit ] Tells the daemon to shut down
+Logging options:
+ -t [ --trace ] Enables all logging
+ --log-enable RULE (notice+) Enables logging for selected levels and components.
+ RULE is in the form 'LEVEL[+-][:PATTERN]'
+ LEVEL is one of:
+ trace debug info notice warning error critical
+ PATTERN is a logging category name, or a namespace-qualified
+ function name or name fragment.
+ Logging category names are:
+ Security Broker Management Protocol System HA Messaging Store
+ Network Test Client Model Unspecified
+
+ For example:
+ '--log-enable warning+'
+ logs all warning, error and critical messages.
+
+ '--log-enable trace+:Broker'
+ logs all category 'Broker' messages.
+
+ '--log-enable debug:framing'
+ logs debug messages from all functions with 'framing' in
+ the namespace or function name.
+
+ This option can be used multiple times
+
+ --log-disable RULE Disables logging for selected levels and components.
+ RULE is in the form 'LEVEL[+-][:PATTERN]'
+ LEVEL is one of:
+ trace debug info notice warning error critical
+ PATTERN is a logging category name, or a namespace-qualified
+ function name or name fragment.
+ Logging category names are:
+ Security Broker Management Protocol System HA Messaging Store
+ Network Test Client Model Unspecified
+
+ For example:
+ '--log-disable warning-'
+ disables logging all warning, notice, info, debug, and
+ trace messages.
+
+ '--log-disable trace:Broker'
+ disables all category 'Broker' trace messages.
+
+ '--log-disable debug-:qmf::'
+ disables logging debug and trace messages from all functions
+ with 'qmf::' in the namespace.
+
+ This option can be used multiple times
+
+ --log-time yes|no (1) Include time in log messages
+ --log-level yes|no (1) Include severity level in log messages
+ --log-source yes|no (0) Include source file:line in log
+ messages
+ --log-thread yes|no (0) Include thread ID in log messages
+ --log-function yes|no (0) Include function signature in log
+ messages
+ --log-hires-timestamp yes|no (0) Use hi-resolution timestamps in log
+ messages
+ --log-category yes|no (1) Include category in log messages
+ --log-prefix STRING Prefix to prepend to all log messages
+
+Logging sink options:
+ --log-to-stderr yes|no (1) Send logging output to stderr
+ --log-to-stdout yes|no (0) Send logging output to stdout
+ --log-to-file FILE Send log output to FILE.
+ --log-to-syslog yes|no (0) Send logging output to syslog;
+ customize using --syslog-name and
+ --syslog-facility
+ --syslog-name NAME (qpidd) Name to use in syslog messages
+ --syslog-facility LOG_XXX (LOG_DAEMON)
+ Facility to use in syslog messages
+
+</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="RASC-Loadingextramodules"></a>1.1.6. 
+ Loading extra modules
+ </h3></div></div></div><p>
+ By default the broker will load all the modules in the module
+ directory, however it will NOT display options for modules that
+ are not loaded. So to see the options for extra modules loaded
+ you need to load the module and then add the help command like
+ this:
+ </p><pre class="programlisting">
+./qpidd --load-module libbdbstore.so --help
+Usage: qpidd OPTIONS
+Options:
+ -h [ --help ] Displays the help message
+ -v [ --version ] Displays version information
+ --config FILE (/etc/qpidd.conf) Reads configuration from FILE
+
+
+ / .... non module options would be here ... /
+
+
+Store Options:
+ --store-directory DIR Store directory location for persistence (overrides
+ --data-dir)
+ --store-async yes|no (1) Use async persistence storage - if store supports
+ it, enables AIO O_DIRECT.
+ --store-force yes|no (0) Force changing modes of store, will delete all
+ existing data if mode is changed. Be SURE you want
+ to do this!
+ --num-jfiles N (8) Number of files in persistence journal
+ --jfile-size-pgs N (24) Size of each journal file in multiples of read
+ pages (1 read page = 64kiB)
+</pre></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="RASC-message-timestamps"></a>1.1.7. Timestamping Received Messages</h3></div></div></div><p>
+ The AMQP 0-10 specification defines a <span class="emphasis"><em>timestamp</em></span> message delivery
+ property. The timestamp delivery property is a <span class="emphasis"><em>datetime</em></span> value
+ that is written to each message that arrives at the broker. See the description of
+ "message.delivery-properties" in the "Command Classes" section of the AMQP 0-10
+ specification for more detail.
+ </p><p>
+ See the <span class="emphasis"><em>Programming in Apache Qpid</em></span> documentation for
+ information regarding how clients may access the timestamp value in received
+ messages.
+ </p><p>
+ By default, this timestamping feature is disabled. To enable timestamping, use the
+ <span class="emphasis"><em>enable-timestamp</em></span> broker configuration option. Setting the
+ enable-timestamp option to 'yes' will enable message timestamping:
+ </p><pre class="programlisting">
+./qpidd --enable-timestamp yes
+ </pre><p>
+ Message timestamping can also be enabled (and disabled) without restarting the broker.
+ The QMF Broker management object defines two methods for accessing the timestamp
+ configuration:
+ </p><div class="table"><a id="idm140173359592576"></a><p class="title"><strong>Table 1.1. QMF Management - Broker Methods for Managing the Timestamp Configuration</strong></p><div class="table-contents"><table border="1" summary="QMF Management - Broker Methods for Managing the Timestamp Configuration"><colgroup><col /><col /></colgroup><thead><tr><th>Method</th><th>Description</th></tr></thead><tbody><tr><td>getTimestampConfig</td><td>Get the message timestamping configuration. Returns True if received messages are timestamped.</td></tr><tr><td>setTimestampConfig</td><td>Set the message timestamping configuration. Set True to enable timestamping received messages, False to disable timestamping.</td></tr></tbody></table></div></div><br class="table-break" /><div class="example"><a id="idm140173359586608"></a><p class="title"><strong>Example 1.1. Enabling Message Timestamping via QMF - Python</strong></p><div class="example-contents"><p>
+ The following code fragment uses these QMF method calls to enable message timestamping.
+ </p><pre class="programlisting" lang="python" xml:lang="python">
+# get the state of the timestamp configuration
+broker = self.qmf.getObjects(_class="broker")[0]
+rc = broker.getTimestampConfig()
+self.assertEqual(rc.status, 0)
+self.assertEqual(rc.text, "OK")
+print("The timestamp setting is %s" % str(rc.receive))
+
+# try to enable it
+rc = broker.setTimestampConfig(True)
+self.assertEqual(rc.status, 0)
+self.assertEqual(rc.text, "OK")
+ </pre></div></div><br class="example-break" /></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="RASC-logging-options"></a>1.1.8. Logging Options</h3></div></div></div><p>
+ The C++ Broker provides a rich set of logging options. To use logging effectively
+ a user must select a useful set of options to expose the log messages of interest.
+ This section introduces the logging options and how they are used in practice.
+ </p><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="RASC-LogConcepts"></a>1.1.8.1. Logging Concepts</h4></div></div></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a id="RASC-LogConcept-level"></a>Log Level</h5></div></div></div><p>
+ The C++ Broker has a traditional set of log severity levels. The log levels
+ range from low frequency and high importance critical level
+ to high frequency and low importance trace level.
+ </p><div class="table"><a id="idm140173359579408"></a><p class="title"><strong>Table 1.2. C++ Broker Log Severity Levels</strong></p><div class="table-contents"><table border="1" summary="C++ Broker Log Severity Levels"><colgroup><col /><col /></colgroup><thead><tr><th>Name</th><th>Level</th></tr></thead><tbody><tr><td>critical</td><td>high</td></tr><tr><td>error</td><td> </td></tr><tr><td>warning</td><td> </td></tr><tr><td>notice</td><td> </td></tr><tr><td>info</td><td> </td></tr><tr><td>debug</td><td> </td></tr><tr><td>trace</td><td>low</td></tr></tbody></table></div></div><br class="table-break" /></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a id="RASC-LogConcept-category"></a>Log Category</h5></div></div></div><p>
+ The C++ Broker groups log messages into categories. The log category
+ name may then be used to enable and disable groups of related messages
+ at varying log levels.
+ </p><div class="table"><a id="idm140173359567776"></a><p class="title"><strong>Table 1.3. C++ Broker Log Categories</strong></p><div class="table-contents"><table border="1" summary="C++ Broker Log Categories"><colgroup><col /></colgroup><thead><tr><th>Name</th></tr></thead><tbody><tr><td>Security</td></tr><tr><td>Broker</td></tr><tr><td>Management</td></tr><tr><td>Protocol</td></tr><tr><td>System</td></tr><tr><td>HA</td></tr><tr><td>Messaging</td></tr><tr><td>Store</td></tr><tr><td>Network</td></tr><tr><td>Test</td></tr><tr><td>Client</td></tr><tr><td>Model</td></tr><tr><td>Unspecified</td></tr></tbody></table></div></div><br class="table-break" /><p>
+ Generally speaking the log categories are groupings of messages from files
+ related by
+ thier placement in the source code directory structure. The
+ <span class="emphasis"><em>Model</em></span> category is an exception. Debug log entries
+ identified by the Model category expose the creation, deletion, and usage
+ statistics for managed objects in the broker. Log messages in the Model
+ category are emitted by source files scattered throughout the source tree.
+ </p></div><div class="section"><div class="titlepage"><div><div><h5 class="title"><a id="RASC-LogConcept-StatementAttributes"></a>Log Statement Attributes</h5></div></div></div><p>
+ Every log statement in the C++ Broker has fixed attributes that may be
+ used in enabling or disabling log messages.
+ </p><div class="table"><a id="idm140173359554912"></a><p class="title"><strong>Table 1.4. C++ Broker Log Statement Attributes</strong></p><div class="table-contents"><table border="1" summary="C++ Broker Log Statement Attributes"><colgroup><col /><col /></colgroup><thead><tr><th>Name</th><th>Description</th></tr></thead><tbody><tr><td>Level</td><td>Severity level</td></tr><tr><td>Category</td><td>Category</td></tr><tr><td>Function</td><td>Namespace-qualified source function name</td></tr></tbody></table></div></div><br class="table-break" /></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="RASC-LogRules-EnableDisable"></a>1.1.8.2. Enabling and Disabling Log Messages</h4></div></div></div><p>
+ The Qpid C++ Broker has hundreds of log message statements in the source
+ code. Under typical conditions
+ most of the messages are deselected and never emitted as actual logs.
+ However, under some circumstances debug and trace messages must be enabled
+ to analyze broker behavior. This section discusses how the broker enables
+ and disables log messages.
+ </p><p>
+ At startup the broker processes command line and option file '--log-enable RULE' and
+ '--log-disable RULE' options using the following rule format:
+ </p><pre class="programlisting">
+ LEVEL[+-][:PATTERN}
+ </pre><div class="table"><a id="idm140173359543920"></a><p class="title"><strong>Table 1.5. C++ Broker Log Enable/Disable RULE Format</strong></p><div class="table-contents"><table border="1" summary="C++ Broker Log Enable/Disable RULE Format"><colgroup><col /><col /></colgroup><thead><tr><th>Name</th><th>Description</th></tr></thead><tbody><tr><td>LEVEL</td><td>Severity level</td></tr><tr><td>[+-]</td><td>
+ Option level modifiers. <span class="emphasis"><em>'+'</em></span> indicates
+ <span class="emphasis"><em>this level and above</em></span>.
+ <span class="emphasis"><em>'-'</em></span> indicates <span class="emphasis"><em>this level and below</em></span>.
+ </td></tr><tr><td>[:PATTERN]</td><td>
+ If PATTERN matches a Category name then the log option applies only
+ to log messages with the named category. Otherwise, the pattern is stored
+ as a function name match string.
+ </td></tr></tbody></table></div></div><br class="table-break" /><p>
+ As the options are procesed the results are aggregated into two pairs of tables.
+ </p><div class="table"><a id="idm140173359533472"></a><p class="title"><strong>Table 1.6. C++ Broker Log Enable/Disable Settings Tables</strong></p><div class="table-contents"><table border="1" summary="C++ Broker Log Enable/Disable Settings Tables"><colgroup><col /><col /></colgroup><thead><tr><th>Name</th><th>Description</th></tr></thead><tbody><tr><td>Function Table</td><td>
+ A set of vectors of accumulated function name patterns.
+ There is a separate vector of name patterns for each log level.
+ </td></tr><tr><td>Category Table</td><td>
+ A simple two dimensional array of boolean values indexed by
+ [Level][Category] indicating
+ if all log statements are enabled for the Level and Category pair.
+ </td></tr></tbody></table></div></div><br class="table-break" /><p>
+ --log-enable statements and --log-disable statements are aggregated into dedicated
+ Function and Category tables. With this scheme multiple conflicting log enable and
+ disable commands may be processed in any order yet produce consistent patterns
+ of enabled broker log statements.
+ </p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="RASC-LogRules-RuleMatching"></a>1.1.8.3. Determining if a Log Statement is Enabled</h4></div></div></div><p>
+ Function Table Lookups are simple string pattern matches where the searchable
+ text is the domain-name qualified function name from the log statement and the
+ search pattern is the set of Function Table entries for a given log level.
+ </p><p>
+ Category Table Lookups are boolean array queries where the Level and Category
+ indexes are from the log statement.
+ </p><p>
+ Each log statment sends its Level, Category, and FunctionName to the
+ Logger for evaluation. As a result the log statement is either visible or hidden.
+ </p><div class="table"><a id="idm140173359522352"></a><p class="title"><strong>Table 1.7. C++ Broker Log Statement Visibility Determination</strong></p><div class="table-contents"><table border="1" summary="C++ Broker Log Statement Visibility Determination"><colgroup><col /><col /></colgroup><thead><tr><th>Test</th><th>Description</th></tr></thead><tbody><tr><td>Disabled Function</td><td>
+ If the statement matches a Disabled Function pattern then the
+ statement is hidden.
+ </td></tr><tr><td>Disabled Category</td><td>
+ If the Disabled Category table for this [Level][Category] is true then the
+ statement is hidden.
+ </td></tr><tr><td>Enabled Function</td><td>
+ If the statement matches a Enabled Function pattern then the
+ statement is visible.
+ </td></tr><tr><td>Enabled Category</td><td>
+ If the Enabled Category table for this [Level][Category] is true then the
+ statement is visible.
+ </td></tr><tr><td>Unreferenced</td><td>
+ Log statements that are unreferenced by specific enable rules are by
+ default hidden.
+ </td></tr></tbody></table></div></div><br class="table-break" /></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="RASC-LogRules-Reenabling"></a>1.1.8.4. Changing Log Enable/Disable Settings at Run Time</h4></div></div></div><p>
+ The C++ Broker provides QMF management methods that allow users to query and to set
+ the log enable and disable settings while the broker is running.
+ </p><div class="table"><a id="idm140173359509056"></a><p class="title"><strong>Table 1.8. QMF Management - Broker Methods for Managing the Log Enable/Disable Settings</strong></p><div class="table-contents"><table border="1" summary="QMF Management - Broker Methods for Managing the Log Enable/Disable Settings"><colgroup><col /><col /></colgroup><thead><tr><th>Method</th><th>Description</th></tr></thead><tbody><tr><td>getLogLevel</td><td>Get the log enable/disable settings.</td></tr><tr><td>setLogLevel</td><td>Set the log enable/disable settings.</td></tr></tbody></table></div></div><br class="table-break" /><p>
+ The management methods use a RULE format similar to the option RULE format:
+ </p><pre class="programlisting">
+ [!]LEVEL[+-][:PATTERN]
+ </pre><p>
+ The difference is the leading exclamation point that identifies disable rules.
+ </p><div class="example"><a id="idm140173359500912"></a><p class="title"><strong>Example 1.2. 
+ Querying Log Settings via qpid-ctrl utility
+ </strong></p><div class="example-contents"><p>
+ At start up a C++ Broker may have the following options:
+ </p><pre class="programlisting">
+ --log-enable debug+
+ --log-enable trace+:Protocol
+ --log-disable info-:Management
+ </pre><p>
+ The following command:
+ </p><pre class="programlisting">
+ qpid-ctrl getLogLevel
+ </pre><p>
+ will return the following result:
+ </p><pre class="programlisting">
+ level=debug+,trace+:Protocol,!info-:Management
+ </pre></div></div><br class="example-break" /><div class="example"><a id="idm140173359497056"></a><p class="title"><strong>Example 1.3. 
+ Setting Log Settings via qpid-ctrl utility
+ </strong></p><div class="example-contents"><p>
+ New broker log options may be set at any time using qpid-ctrl
+ </p><pre class="programlisting">
+ qpid-ctrl setLogLevel level='debug+:Broker !debug-:broker::Broker::ManagementMethod'
+ </pre></div></div><br class="example-break" /></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="RASC-LogRules-Explorer"></a>1.1.8.5. Discovering Log Sources</h4></div></div></div><p>
+ A common condition for a user is being swamped by log messages that are not
+ interesting for some debug situation. Conversely, a particular log entry
+ may be of interest all the time but enabling all log levels just to see a
+ single log entry is too much. How can a user find and specify a pattern
+ to single out logs of interest?
+ </p><p>
+ The easiest way to hide messages it to disable logs at log level and
+ category combinations. This may not always work since using only these
+ coarse controls the log messages of interest may also be hidden.
+ To discover a more precise filter to specify the messages you want
+ to show or to hide you may temporarily enable the
+ <span class="emphasis"><em>"--log-function=yes"</em></span> option.
+ The following log entries show a typical log message without and
+ with the log function names enabled:
+ </p><pre class="programlisting">
+ 2013-05-01 11:16:01 [Broker] notice Broker running
+ 2013-05-01 11:16:54 [Broker] notice qpid::broker::Broker::run: Broker running
+ </pre><p>
+ This log entry is emitted by function <span class="emphasis"><em>qpid::broker::Broker::run</em></span>
+ and this is the function name pattern to be used in specific log enable and
+ disable rules.
+ For example, this log entry could be disabled with any of the following:
+ </p><pre class="programlisting">
+ --log-disable notice [1]
+ --log-disable notice:qpid:: [2]
+ --log-disable notice:Broker [3]
+ --log-disable notice-:Broker::run [4]
+ --log-disable notice:qpid::broker::Broker::run [5]
+ </pre><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+ [1] Disables all messages at notice level.
+ </li><li class="listitem">
+ [2] Disables all messages at notice level in qpid:: name space. This is
+ very broad and disables many log messages.
+ </li><li class="listitem">
+ [3] Disables the category <span class="emphasis"><em>[Broker]</em></span> and is not specific
+ to the function. Category names supercede function name fragments in
+ log option processing
+ </li><li class="listitem">
+ [4] Disables the function.
+ </li><li class="listitem">
+ [5] Disables the function.
+ </li></ul></div><p>
+ Remember that the log filter matching PATTERN strings are matched against the
+ domain-name qualified function names associated with the log statement
+ and not against the log message text itself. That is, in the previous example
+ log filters cannot be set on the log text <span class="emphasis"><em>Broker running</em></span>
+ </p></div></div></div></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="pr01.html">Prev</a> </td><td align="center" width="20%"> </td><td align="right" width="40%"> <a accesskey="n" href="ch01s02.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">Introduction </td><td align="center" width="20%"><a accesskey="h" href="index.html">Home</a></td><td align="right" valign="top" width="40%"> 1.2. 
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+ <li><a href="/components/java-broker/index.html">Broker for Java</a></li>
+ <li><a href="/components/cpp-broker/index.html">C++ broker</a></li>
+ <li><a href="/components/dispatch-router/index.html">Dispatch router</a></li>
+ </ul>
+ </section>
+
+ <section>
+ <h3>Resources</h3>
+
+ <ul>
+ <li><a href="/dashboard.html">Dashboard</a></li>
+ <li><a href="https://cwiki.apache.org/confluence/display/qpid/Index">Wiki</a></li>
+ <li><a href="/resources.html">More resources</a></li>
+ </ul>
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+
+ <div id="-middle-content">
+ <div class="docbook"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">1.2. 
+ Cheat Sheet for configuring Queue Options
+ </th></tr><tr><td align="left" width="20%"><a accesskey="p" href="ch01.html">Prev</a> </td><th align="center" width="60%">Chapter 1. 
+ Running the AMQP Messaging Broker
+ </th><td align="right" width="20%"> <a accesskey="n" href="ch01s03.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title"><a id="idm140173359833200"></a>1.2. 
+ Cheat Sheet for configuring Queue Options
+ </h2></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="CheatSheetforconfiguringQueueOptions-ConfiguringQueueOptions"></a>1.2.1. 
+ Configuring
+ Queue Options
+ </h3></div></div></div><p>
+ The C++ Broker M4 or later supports the following additional
+ Queue constraints.
+ </p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>
+ <a class="xref" href="ch01s02.html#CheatSheetforconfiguringQueueOptions-ConfiguringQueueOptions" title="1.2.1.  Configuring Queue Options">Section 1.2.1, “
+ Configuring
+ Queue Options
+ ”</a>
+ </p></li><li class="listitem"><p>
+ </p><div class="itemizedlist"><ul class="itemizedlist" type="circle"><li class="listitem"><p>
+ <a class="xref" href="ch01s02.html#CheatSheetforconfiguringQueueOptions-ApplyingQueueSizingConstraints" title="1.2.1.1.  Applying Queue Sizing Constraints">Section 1.2.1.1, “
+ Applying Queue Sizing Constraints
+ ”</a>
+ </p></li><li class="listitem"><p>
+ <a class="xref" href="ch01s02.html#CheatSheetforconfiguringQueueOptions-ChangingtheQueueorderingBehaviors-28FIFO-2FLVQ-29" title="1.2.1.2.  Changing the Queue ordering Behaviors (FIFO/LVQ)">Section 1.2.1.2, “
+ Changing the Queue ordering Behaviors (FIFO/LVQ)
+ ”</a>
+ </p></li><li class="listitem"><p>
+ <a class="xref" href="ch01s02.html#CheatSheetforconfiguringQueueOptions-Settingadditionalbehaviors" title="1.2.1.3.  Setting additional behaviors">Section 1.2.1.3, “
+ Setting additional behaviors
+ ”</a>
+ </p></li><li class="listitem"><p>
+ </p><div class="itemizedlist"><ul class="itemizedlist" type="square"><li class="listitem"><p>
+ <a class="xref" href="">???</a>
+ </p></li></ul></div><p>
+ </p></li><li class="listitem"><p>
+ <a class="xref" href="ch01s02.html#CheatSheetforconfiguringQueueOptions-OtherClients" title="1.2.1.4.  Other Clients">Section 1.2.1.4, “
+ Other
+ Clients
+ ”</a>
+ </p></li></ul></div><p>
+ </p></li></ul></div><p>
+ The 0.10 C++ Broker supports the following additional Queue configuration options:
+ </p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>
+ <a class="xref" href="producer-flow-control.html" title="1.8.  Producer Flow Control">Section 1.8, “
+ Producer Flow Control
+ ”</a>
+ </p></li></ul></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="CheatSheetforconfiguringQueueOptions-ApplyingQueueSizingConstraints"></a>1.2.1.1. 
+ Applying Queue Sizing Constraints
+ </h4></div></div></div><p>
+ This allows to specify how to size a queue and what to do when
+ the sizing constraints have been reached. The queue size can be
+ limited by the number messages (message depth) or byte depth on
+ the queue.
+ </p><p>
+ Once the Queue meets/ exceeds these constraints the follow
+ policies can be applied
+ </p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>REJECT - Reject the published message
+ </p></li><li class="listitem"><p>FLOW_TO_DISK - Flow the messages to disk, to preserve memory
+ </p></li><li class="listitem"><p>RING - start overwriting messages in a ring based on sizing.
+ If head meets tail, advance head
+ </p></li><li class="listitem"><p>RING_STRICT - start overwriting messages in a ring based on
+ sizing. If head meets tail, AND the consumer has the tail message
+ acquired it will reject
+ </p></li></ul></div><p>
+ Examples:
+ </p><p>
+ Create a queue an auto delete queue that will support 100 000
+ bytes, and then REJECT
+ </p><pre class="programlisting">
+#include "qpid/client/QueueOptions.h"
+
+ QueueOptions qo;
+ qo.setSizePolicy(REJECT,100000,0);
+
+ session.queueDeclare(arg::queue=queue, arg::autoDelete=true, arg::arguments=qo);
+</pre><p>
+ Create a queue that will support 1000 messages into a RING buffer
+ </p><pre class="programlisting">
+#include "qpid/client/QueueOptions.h"
+
+ QueueOptions qo;
+ qo.setSizePolicy(RING,0,1000);
+
+ session.queueDeclare(arg::queue=queue, arg::arguments=qo);
+</pre></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="CheatSheetforconfiguringQueueOptions-ChangingtheQueueorderingBehaviors-28FIFO-2FLVQ-29"></a>1.2.1.2. 
+ Changing the Queue ordering Behaviors (FIFO/LVQ)
+ </h4></div></div></div><p>
+ The default ordering in a queue in Qpid is FIFO. However
+ additional ordering semantics can be used namely LVQ (Last Value
+ Queue). Last Value Queue is define as follows.
+ </p><p>
+ If I publish symbols RHT, IBM, JAVA, MSFT, and then publish RHT
+ before the consumer is able to consume RHT, that message will be
+ over written in the queue and the consumer will receive the last
+ published value for RHT.
+ </p><p>
+ Example:
+ </p><pre class="programlisting">
+#include "qpid/client/QueueOptions.h"
+
+ QueueOptions qo;
+ qo.setOrdering(LVQ);
+
+ session.queueDeclare(arg::queue=queue, arg::arguments=qo);
+
+ .....
+ string key;
+ qo.getLVQKey(key);
+
+ ....
+ for each message, set the into application headers before transfer
+ message.getHeaders().setString(key,"RHT");
+
+</pre><p>
+ Notes:
+ </p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Messages that are dequeued and the re-queued will have the
+ following exceptions. a.) if a new message has been queued with
+ the same key, the re-queue from the consumer, will combine these
+ two messages. b.) If an update happens for a message of the same
+ key, after the re-queue, it will not update the re-queued
+ message. This is done to protect a client from being able to
+ adversely manipulate the queue.
+ </p></li><li class="listitem"><p>Acquire: When a message is acquired from the queue, no matter
+ it's position, it will behave the same as a dequeue
+ </p></li><li class="listitem"><p>LVQ does not support durable messages. If the queue or
+ messages are declared durable on an LVQ, the durability will be
+ ignored.
+ </p></li></ul></div><p>
+ A fully worked <a class="xref" href="ch01s06.html#LVQ-Example" title="1.6.3. LVQ Example">Section 1.6.3, “LVQ Example”</a> can be found here
+ </p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="CheatSheetforconfiguringQueueOptions-Settingadditionalbehaviors"></a>1.2.1.3. 
+ Setting additional behaviors
+ </h4></div></div></div></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="CheatSheetforconfiguringQueueOptions-OtherClients"></a>1.2.1.4. 
+ Other
+ Clients
+ </h4></div></div></div><p>
+ Note that these options can be set from any client. QueueOptions
+ just correctly formats the arguments passed to the QueueDeclare()
+ method.
+ </p></div></div></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="ch01.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="ch01s03.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">Chapter 1. 
+ Running 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%"> 1.3. 
+ Cheat Sheet for configuring Exchange Options
+ </td></tr></table></div></div>
+
+ <hr/>
+
+ <ul id="-apache-navigation">
+ <li><a href="http://www.apache.org/">Apache</a></li>
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+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
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+ 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
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http://git-wip-us.apache.org/repos/asf/qpid-site/blob/eff0fe55/content/releases/qpid-cpp-1.35.0/cpp-broker/book/ch01s03.html
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+
+ <div id="-middle-content">
+ <div class="docbook"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">1.3. 
+ Cheat Sheet for configuring Exchange Options
+ </th></tr><tr><td align="left" width="20%"><a accesskey="p" href="ch01s02.html">Prev</a> </td><th align="center" width="60%">Chapter 1. 
+ Running the AMQP Messaging Broker
+ </th><td align="right" width="20%"> <a accesskey="n" href="chap-Messaging_User_Guide-Broker_Federation.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title"><a id="idm140173359724448"></a>1.3. 
+ Cheat Sheet for configuring Exchange Options
+ </h2></div></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="CheatSheetforconfiguringExchangeOptions-ConfiguringExchangeOptions"></a>1.3.1. 
+ Configuring Exchange Options
+ </h3></div></div></div><p>
+ The C++ Broker M4 or later supports the following additional
+ Exchange options in addition to the standard AMQP define options
+ </p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Exchange Level Message sequencing
+ </p></li><li class="listitem"><p>Initial Value Exchange
+ </p></li></ul></div><p>
+ Note that these features can be used on any exchange type, that
+ has been declared with the options set.
+ </p><p>
+ It also supports an additional option to the bind operation on a
+ direct exchange
+ </p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>Exclusive binding for key
+ </p></li></ul></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="CheatSheetforconfiguringExchangeOptions-ExchangeLevelMessagesequencing"></a>1.3.1.1. 
+ Exchange Level Message sequencing
+ </h4></div></div></div><p>
+ This feature can be used to place a sequence number into each
+ message's headers, based on the order they pass through an
+ exchange. The sequencing starts at 0 and then wraps in an AMQP
+ int64 type.
+ </p><p>
+ The field name used is "qpid.msg_sequence"
+ </p><p>
+ To use this feature an exchange needs to be declared specifying
+ this option in the declare
+ </p><pre class="programlisting">
+....
+ FieldTable args;
+ args.setInt("qpid.msg_sequence",1);
+
+...
+ // now declare the exchange
+ session.exchangeDeclare(arg::exchange="direct", arg::arguments=args);
+</pre><p>
+ Then each message passing through that exchange will be numbers
+ in the application headers.
+ </p><pre class="programlisting">
+ unit64_t seqNo;
+ //after message transfer
+ seqNo = message.getHeaders().getAsInt64("qpid.msg_sequence");
+</pre></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="CheatSheetforconfiguringExchangeOptions-InitialValueExchange"></a>1.3.1.2. 
+ Initial
+ Value Exchange
+ </h4></div></div></div><p>
+ This feature caches a last message sent to an exchange. When a
+ new binding is created onto the exchange it will then attempt to
+ route this cached messaged to the queue, based on the binding.
+ This allows for topics or the creation of configurations where a
+ new consumer can receive the last message sent to the broker,
+ with matching routing.
+ </p><p>
+ To use this feature an exchange needs to be declared specifying
+ this option in the declare
+ </p><pre class="programlisting">
+....
+ FieldTable args;
+ args.setInt("qpid.ive",1);
+
+...
+ // now declare the exchange
+ session.exchangeDeclare(arg::exchange="direct", arg::arguments=args);
+</pre><p>
+ now use the exchange in the same way you would use any other
+ exchange.
+ </p></div><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="CheatSheetforconfiguringExchangeOptions-Exclusivebindingforkey"></a>1.3.1.3. 
+ Exclusive
+ binding for key
+ </h4></div></div></div><p>
+ Direct exchanges in qpidd support a qpid.exclusive-binding option
+ on the bind operation that causes the binding specified to be the
+ only one for the given key. I.e. if there is already a binding at
+ this exchange with this key it will be atomically updated to bind
+ the new queue. This means that the binding can be changed
+ concurrently with an incoming stream of messages and each message
+ will be routed to exactly one queue.
+ </p><pre class="programlisting">
+....
+ FieldTable args;
+ args.setInt("qpid.exclusive-binding",1);
+
+ //the following will cause the only binding from amq.direct with 'my-key'
+ //to be the one to 'my-queue'; if there were any previous bindings for that
+ //key they will be removed. This is atomic w.r.t message routing through the
+ //exchange.
+ session.exchangeBind(arg::exchange="amq.direct", arg::queue="my-queue",
+ arg::bindingKey="my-key", arg::arguments=args);
+
+...
+</pre></div></div></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="ch01s02.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="chap-Messaging_User_Guide-Broker_Federation.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">1.2. 
+ Cheat Sheet for configuring Queue Options
+  </td><td align="center" width="20%"><a accesskey="h" href="index.html">Home</a></td><td align="right" valign="top" width="40%"> 1.4. Broker Federation</td></tr></table></div></div>
+
+ <hr/>
+
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+
+ <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
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