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| Introduction |
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| <b>1.</b> |
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| <b>2.</b> |
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| Preface |
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| <b>4.</b> |
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| Messaging Concepts |
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| <b>5.</b> |
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| Architecture |
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| <b>6.</b> |
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| Using the Server |
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| <b>7.</b> |
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| Using JMS |
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| <b>8.</b> |
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| Using Core |
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| <a href="./jms-core-mapping.html"> |
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| <b>9.</b> |
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| Mapping JMS Concepts to the Core API |
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| <a href="./client-classpath.html"> |
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| <b>10.</b> |
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| The Client Classpath |
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| <b>11.</b> |
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| Examples |
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| <b>12.</b> |
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| Routing Messages With Wild Cards |
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| <li class="chapter " data-level="13" data-path="wildcard-syntax.html"> |
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| <a href="./wildcard-syntax.html"> |
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| <b>13.</b> |
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| Understanding the Apache ActiveMQ Artemis Wildcard Syntax |
| </a> |
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| </li> |
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| <li class="chapter " data-level="14" data-path="filter-expressions.html"> |
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| <a href="./filter-expressions.html"> |
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| <b>14.</b> |
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| Filter Expressions |
| </a> |
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| <b>15.</b> |
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| Persistence |
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| <a href="./configuring-transports.html"> |
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| <b>16.</b> |
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| Configuring Transports |
| </a> |
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| <li class="chapter " data-level="17" data-path="connection-ttl.html"> |
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| <a href="./connection-ttl.html"> |
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| <b>17.</b> |
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| Detecting Dead Connections |
| </a> |
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| </li> |
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| <li class="chapter " data-level="18" data-path="slow-consumers.html"> |
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| <a href="./slow-consumers.html"> |
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| <b>18.</b> |
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| Detecting Slow Consumers |
| </a> |
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| </li> |
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| <li class="chapter " data-level="19" data-path="transaction-config.html"> |
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| <a href="./transaction-config.html"> |
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| <b>19.</b> |
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| Resource Manager Configuration |
| </a> |
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| <li class="chapter " data-level="20" data-path="flow-control.html"> |
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| <a href="./flow-control.html"> |
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| <b>20.</b> |
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| Flow Control |
| </a> |
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| </li> |
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| <li class="chapter " data-level="21" data-path="send-guarantees.html"> |
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| <a href="./send-guarantees.html"> |
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| <b>21.</b> |
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| Guarantees of sends and commits |
| </a> |
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| </li> |
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| <li class="chapter " data-level="22" data-path="undelivered-messages.html"> |
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| <a href="./undelivered-messages.html"> |
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| <b>22.</b> |
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| Message Redelivery and Undelivered Messages |
| </a> |
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| </li> |
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| <li class="chapter " data-level="23" data-path="message-expiry.html"> |
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| <a href="./message-expiry.html"> |
| <i class="fa fa-check"></i> |
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| <b>23.</b> |
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| Message Expiry |
| </a> |
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| </li> |
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| <li class="chapter " data-level="24" data-path="large-messages.html"> |
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| <a href="./large-messages.html"> |
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| <b>24.</b> |
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| Large Messages |
| </a> |
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| </li> |
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| <li class="chapter " data-level="25" data-path="paging.html"> |
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| <a href="./paging.html"> |
| <i class="fa fa-check"></i> |
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| <b>25.</b> |
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| Paging |
| </a> |
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| </li> |
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| <li class="chapter active" data-level="26" data-path="queue-attributes.html"> |
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| <a href="./queue-attributes.html"> |
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| <b>26.</b> |
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| Queue Attributes |
| </a> |
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| </li> |
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| <li class="chapter " data-level="27" data-path="scheduled-messages.html"> |
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| <a href="./scheduled-messages.html"> |
| <i class="fa fa-check"></i> |
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| <b>27.</b> |
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| Scheduled Messages |
| </a> |
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| </li> |
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| <li class="chapter " data-level="28" data-path="last-value-queues.html"> |
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| <a href="./last-value-queues.html"> |
| <i class="fa fa-check"></i> |
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| <b>28.</b> |
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| Last-Value Queues |
| </a> |
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| </li> |
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| <li class="chapter " data-level="29" data-path="message-grouping.html"> |
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| <a href="./message-grouping.html"> |
| <i class="fa fa-check"></i> |
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| <b>29.</b> |
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| Message Grouping |
| </a> |
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| </li> |
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| <li class="chapter " data-level="30" data-path="pre-acknowledge.html"> |
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| <a href="./pre-acknowledge.html"> |
| <i class="fa fa-check"></i> |
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| <b>30.</b> |
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| Extra Acknowledge Modes |
| </a> |
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| </li> |
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| <li class="chapter " data-level="31" data-path="management.html"> |
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| <a href="./management.html"> |
| <i class="fa fa-check"></i> |
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| <b>31.</b> |
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| Management |
| </a> |
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| </li> |
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| <li class="chapter " data-level="32" data-path="security.html"> |
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| <a href="./security.html"> |
| <i class="fa fa-check"></i> |
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| <b>32.</b> |
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| Security |
| </a> |
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| </li> |
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| <li class="chapter " data-level="33" data-path="resource-limits.html"> |
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| <a href="./resource-limits.html"> |
| <i class="fa fa-check"></i> |
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| <b>33.</b> |
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| Resource Limits |
| </a> |
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| </li> |
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| <li class="chapter " data-level="34" data-path="jms-bridge.html"> |
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| <a href="./jms-bridge.html"> |
| <i class="fa fa-check"></i> |
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| <b>34.</b> |
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| The JMS Bridge |
| </a> |
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| </li> |
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| <li class="chapter " data-level="35" data-path="client-reconnection.html"> |
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| <a href="./client-reconnection.html"> |
| <i class="fa fa-check"></i> |
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| <b>35.</b> |
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| Client Reconnection and Session Reattachment |
| </a> |
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| </li> |
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| <li class="chapter " data-level="36" data-path="diverts.html"> |
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| <a href="./diverts.html"> |
| <i class="fa fa-check"></i> |
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| <b>36.</b> |
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| Diverting and Splitting Message Flows |
| </a> |
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| </li> |
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| <li class="chapter " data-level="37" data-path="core-bridges.html"> |
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| <a href="./core-bridges.html"> |
| <i class="fa fa-check"></i> |
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| <b>37.</b> |
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| Core Bridges |
| </a> |
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| </li> |
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| <li class="chapter " data-level="38" data-path="duplicate-detection.html"> |
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| <a href="./duplicate-detection.html"> |
| <i class="fa fa-check"></i> |
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| <b>38.</b> |
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| Duplicate Message Detection |
| </a> |
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| </li> |
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| <li class="chapter " data-level="39" data-path="clusters.html"> |
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| <a href="./clusters.html"> |
| <i class="fa fa-check"></i> |
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| <b>39.</b> |
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| Clusters |
| </a> |
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| </li> |
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| <li class="chapter " data-level="40" data-path="ha.html"> |
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| <a href="./ha.html"> |
| <i class="fa fa-check"></i> |
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| <b>40.</b> |
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| High Availability and Failover |
| </a> |
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| </li> |
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| <li class="chapter " data-level="41" data-path="graceful-shutdown.html"> |
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| <a href="./graceful-shutdown.html"> |
| <i class="fa fa-check"></i> |
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| <b>41.</b> |
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| Graceful Server Shutdown |
| </a> |
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| </li> |
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| <li class="chapter " data-level="42" data-path="libaio.html"> |
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| <a href="./libaio.html"> |
| <i class="fa fa-check"></i> |
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| <b>42.</b> |
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| Libaio Native Libraries |
| </a> |
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| </li> |
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| <li class="chapter " data-level="43" data-path="thread-pooling.html"> |
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| <a href="./thread-pooling.html"> |
| <i class="fa fa-check"></i> |
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| <b>43.</b> |
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| Thread management |
| </a> |
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| </li> |
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| <li class="chapter " data-level="44" data-path="logging.html"> |
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| <a href="./logging.html"> |
| <i class="fa fa-check"></i> |
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| <b>44.</b> |
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| Logging |
| </a> |
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| </li> |
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| <li class="chapter " data-level="45" data-path="rest.html"> |
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| <a href="./rest.html"> |
| <i class="fa fa-check"></i> |
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| <b>45.</b> |
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| REST Interface |
| </a> |
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| </li> |
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| <li class="chapter " data-level="46" data-path="embedding-activemq.html"> |
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| <a href="./embedding-activemq.html"> |
| <i class="fa fa-check"></i> |
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| <b>46.</b> |
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| Embedding Apache ActiveMQ Artemis |
| </a> |
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| </li> |
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| <li class="chapter " data-level="47" data-path="spring-integration.html"> |
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| <a href="./spring-integration.html"> |
| <i class="fa fa-check"></i> |
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| <b>47.</b> |
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| Spring Integration |
| </a> |
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| </li> |
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| <li class="chapter " data-level="48" data-path="aerogear-integration.html"> |
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| <a href="./aerogear-integration.html"> |
| <i class="fa fa-check"></i> |
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| <b>48.</b> |
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| AeroGear Integration |
| </a> |
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| </li> |
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| <li class="chapter " data-level="49" data-path="vertx-integration.html"> |
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| <a href="./vertx-integration.html"> |
| <i class="fa fa-check"></i> |
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| <b>49.</b> |
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| VertX Integration |
| </a> |
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| </li> |
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| <li class="chapter " data-level="50" data-path="intercepting-operations.html"> |
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| <a href="./intercepting-operations.html"> |
| <i class="fa fa-check"></i> |
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| <b>50.</b> |
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| Intercepting Operations |
| </a> |
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| </li> |
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| <li class="chapter " data-level="51" data-path="protocols-interoperability.html"> |
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| <a href="./protocols-interoperability.html"> |
| <i class="fa fa-check"></i> |
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| <b>51.</b> |
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| Protocols and Interoperability |
| </a> |
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| </li> |
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| <li class="chapter " data-level="52" data-path="tools.html"> |
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| <a href="./tools.html"> |
| <i class="fa fa-check"></i> |
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| <b>52.</b> |
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| Tools |
| </a> |
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| </li> |
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| <li class="chapter " data-level="53" data-path="maven-plugin.html"> |
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| <a href="./maven-plugin.html"> |
| <i class="fa fa-check"></i> |
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| <b>53.</b> |
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| Maven Plugin |
| </a> |
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| |
| </li> |
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| <li class="chapter " data-level="54" data-path="perf-tuning.html"> |
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| <a href="./perf-tuning.html"> |
| <i class="fa fa-check"></i> |
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| <b>54.</b> |
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| Troubleshooting and Performance Tuning |
| </a> |
| |
| |
| |
| </li> |
| |
| <li class="chapter " data-level="55" data-path="configuration-index.html"> |
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| |
| <a href="./configuration-index.html"> |
| <i class="fa fa-check"></i> |
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| <b>55.</b> |
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| Configuration Reference |
| </a> |
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| </li> |
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| Published with GitBook |
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| <!-- Title --> |
| <h1> |
| <i class="fa fa-circle-o-notch fa-spin"></i> |
| <a href="./" >ActiveMQ Artemis Documentation</a> |
| </h1> |
| </div> |
| |
| <div class="page-wrapper" tabindex="-1"> |
| <div class="page-inner"> |
| |
| |
| <section class="normal" id="section-"> |
| |
| <h1 id="queue-attributes">Queue Attributes</h1> |
| <p>Queue attributes can be set in one of two ways. Either by configuring |
| them using the configuration file or by using the core API. This chapter |
| will explain how to configure each attribute and what effect the |
| attribute has.</p> |
| <h2 id="predefined-queues">Predefined Queues</h2> |
| <p>Queues can be predefined via configuration at a core level or at a JMS |
| level. Firstly let's look at a JMS level.</p> |
| <p>The following shows a queue predefined in the jms element of the <code>broker.xml</code> |
| configuration file.</p> |
| <pre><code><queue name="selectorQueue"> |
| <entry name="/queue/selectorQueue"/> |
| <selector string="color='red'"/> |
| <durable>true</durable> |
| </queue> |
| </code></pre><p>This name attribute of queue defines the name of the queue. When we do |
| this at a jms level we follow a naming convention so the actual name of |
| the core queue will be <code>jms.queue.selectorQueue</code>.</p> |
| <p>The entry element configures the name that will be used to bind the |
| queue to JNDI. This is a mandatory element and the queue can contain |
| multiple of these to bind the same queue to different names.</p> |
| <p>The selector element defines what JMS message selector the predefined |
| queue will have. Only messages that match the selector will be added to |
| the queue. This is an optional element with a default of null when |
| omitted.</p> |
| <p>The durable element specifies whether the queue will be persisted. This |
| again is optional and defaults to true if omitted.</p> |
| <p>Secondly a queue can be predefined at a core level in the |
| <code>broker.xml</code> file. The following is an example.</p> |
| <pre><code><queues> |
| <queue name="jms.queue.selectorQueue"> |
| <address>jms.queue.selectorQueue</address> |
| <filter string="color='red'"/> |
| <durable>true</durable> |
| </queue> |
| </queues> |
| </code></pre><p>This is very similar to the JMS configuration, with 3 real differences |
| which are.</p> |
| <ol> |
| <li><p>The name attribute of queue is the actual name used for the queue |
| with no naming convention as in JMS.</p> |
| </li> |
| <li><p>The address element defines what address is used for routing |
| messages.</p> |
| </li> |
| <li><p>There is no entry element.</p> |
| </li> |
| <li><p>The filter uses the <em>Core filter syntax</em> (described in <a href="filter-expressions.html">filter Expressions</a>), <em>not</em> the |
| JMS selector syntax.</p> |
| </li> |
| </ol> |
| <h2 id="using-the-api">Using the API</h2> |
| <p>Queues can also be created using the core API or the management API.</p> |
| <p>For the core API, queues can be created via the |
| <code>org.apache.activemq.artemis.api.core.client.ClientSession</code> interface. There are |
| multiple <code>createQueue</code> methods that support setting all of the |
| previously mentioned attributes. There is one extra attribute that can |
| be set via this API which is <code>temporary</code>. setting this to true means |
| that the queue will be deleted once the session is disconnected.</p> |
| <p>Take a look at <a href="management.html">Management</a> for a description of the management API for creating |
| queues.</p> |
| <h2 id="configuring-queues-via-address-settings">Configuring Queues Via Address Settings</h2> |
| <p>There are some attributes that are defined against an address wildcard |
| rather than a specific queue. Here an example of an <code>address-setting</code> |
| entry that would be found in the <code>broker.xml</code> file.</p> |
| <pre><code><address-settings> |
| <address-setting match="jms.queue.exampleQueue"> |
| <dead-letter-address>jms.queue.deadLetterQueue</dead-letter-address> |
| <max-delivery-attempts>3</max-delivery-attempts> |
| <redelivery-delay>5000</redelivery-delay> |
| <expiry-address>jms.queue.expiryQueue</expiry-address> |
| <last-value-queue>true</last-value-queue> |
| <max-size-bytes>100000</max-size-bytes> |
| <page-size-bytes>20000</page-size-bytes> |
| <redistribution-delay>0</redistribution-delay> |
| <send-to-dla-on-no-route>true</send-to-dla-on-no-route> |
| <address-full-policy>PAGE</address-full-policy> |
| <slow-consumer-threshold>-1</slow-consumer-threshold> |
| <slow-consumer-policy>NOTIFY</slow-consumer-policy> |
| <slow-consumer-check-period>5</slow-consumer-check-period> |
| <auto-create-queues>true</auto-create-queues> |
| <auto-delete-queues>true</auto-delete-queues> |
| </address-setting> |
| </address-settings> |
| </code></pre><p>The idea with address settings, is you can provide a block of settings |
| which will be applied against any addresses that match the string in the |
| <code>match</code> attribute. In the above example the settings would only be |
| applied to any addresses which exactly match the address |
| <code>jms.queue.exampleQueue</code>, but you can also use wildcards to apply sets |
| of configuration against many addresses. The wildcard syntax used is |
| described <a href="#wildcard-syntax">here</a>.</p> |
| <p>For example, if you used the <code>match</code> string <code>jms.queue.#</code> the settings |
| would be applied to all addresses which start with <code>jms.queue.</code> which |
| would be all JMS queues.</p> |
| <p>The meaning of the specific settings are explained fully throughout the |
| user manual, however here is a brief description with a link to the |
| appropriate chapter if available.</p> |
| <p><code>max-delivery-attempts</code> defines how many time a cancelled message can be |
| redelivered before sending to the <code>dead-letter-address</code>. A full |
| explanation can be found <a href="#undelivered-messages.configuring">here</a>.</p> |
| <p><code>redelivery-delay</code> defines how long to wait before attempting redelivery |
| of a cancelled message. see <a href="#undelivered-messages.delay">here</a>.</p> |
| <p><code>expiry-address</code> defines where to send a message that has expired. see |
| <a href="#message-expiry.configuring">here</a>.</p> |
| <p><code>expiry-delay</code> defines the expiration time that will be used for |
| messages which are using the default expiration time (i.e. 0). For |
| example, if <code>expiry-delay</code> is set to "10" and a message which is using |
| the default expiration time (i.e. 0) arrives then its expiration time of |
| "0" will be changed to "10." However, if a message which is using an |
| expiration time of "20" arrives then its expiration time will remain |
| unchanged. Setting <code>expiry-delay</code> to "-1" will disable this feature. The |
| default is "-1".</p> |
| <p><code>last-value-queue</code> defines whether a queue only uses last values or not. |
| see <a href="#last-value-queues">here</a>.</p> |
| <p><code>max-size-bytes</code> and <code>page-size-bytes</code> are used to set paging on an |
| address. This is explained <a href="#paging">here</a>.</p> |
| <p><code>redistribution-delay</code> defines how long to wait when the last consumer |
| is closed on a queue before redistributing any messages. see |
| <a href="#clusters">here</a>.</p> |
| <p><code>send-to-dla-on-no-route</code>. If a message is sent to an address, but the |
| server does not route it to any queues, for example, there might be no |
| queues bound to that address, or none of the queues have filters that |
| match, then normally that message would be discarded. However if this |
| parameter is set to true for that address, if the message is not routed |
| to any queues it will instead be sent to the dead letter address (DLA) |
| for that address, if it exists.</p> |
| <p><code>address-full-policy</code>. This attribute can have one of the following |
| values: PAGE, DROP, FAIL or BLOCK and determines what happens when an |
| address where <code>max-size-bytes</code> is specified becomes full. The default |
| value is PAGE. If the value is PAGE then further messages will be paged |
| to disk. If the value is DROP then further messages will be silently |
| dropped. If the value is FAIL then further messages will be dropped and |
| an exception will be thrown on the client-side. If the value is BLOCK |
| then client message producers will block when they try and send further |
| messages. See the following chapters for more info <a href="flow-control.html">Flow Control</a>, <a href="paging.html">Paging</a>.</p> |
| <p><code>slow-consumer-threshold</code>. The minimum rate of message consumption |
| allowed before a consumer is considered "slow." Measured in |
| messages-per-second. Default is -1 (i.e. disabled); any other valid |
| value must be greater than 0.</p> |
| <p><code>slow-consumer-policy</code>. What should happen when a slow consumer is |
| detected. <code>KILL</code> will kill the consumer's connection (which will |
| obviously impact any other client threads using that same connection). |
| <code>NOTIFY</code> will send a CONSUMER_SLOW management notification which an |
| application could receive and take action with. See <a href="slow-consumers.html">slow consumers</a> for more details |
| on this notification.</p> |
| <p><code>slow-consumer-check-period</code>. How often to check for slow consumers on a |
| particular queue. Measured in minutes. Default is 5. See <a href="slow-consumers.html">slow consumers</a> |
| for more information about slow consumer detection.</p> |
| <p><code>auto-create-jms-queues</code>. Whether or not the broker should automatically |
| create a JMS queue when a JMS message is sent to a queue whose name fits |
| the address <code>match</code> (remember, a JMS queue is just a core queue which has |
| the same address and queue name) or a JMS consumer tries to connect to a |
| queue whose name fits the address <code>match</code>. Queues which are auto-created |
| are durable, non-temporary, and non-transient.</p> |
| <p><code>auto-delete-jms-queues</code>. Whether or not to the broker should automatically |
| delete auto-created JMS queues when they have both 0 consumers and 0 messages.</p> |
| |
| |
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