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| Jakarta |
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| Persistence |
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| Configuring Transports |
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| Detecting Dead Connections |
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| Detecting Slow Consumers |
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| Detecting Broker Issues (Critical Analysis) |
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| Resource Manager Configuration |
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| Flow Control |
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| Guarantees of sends and commits |
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| Message Redelivery and Undelivered Messages |
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| Message Expiry |
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| Large Messages |
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| Paging |
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| Scheduled Messages |
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| Last-Value Queues |
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| Non-Destructive Queues |
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| Ring Queues |
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| Retroactive Addresses |
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| Exclusive Queues |
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| Message Grouping |
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| Consumer Priority |
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| Extra Acknowledge Modes |
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| Management |
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| Management Console |
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| Metrics |
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| Security |
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| <a href="masking-passwords.html"> |
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| Masking Passwords |
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| </a> |
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| <a href="broker-plugins.html"> |
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| Broker Plugins |
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| </a> |
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| <a href="resource-limits.html"> |
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| Resource Limits |
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| </a> |
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| <a href="jms-bridge.html"> |
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| The JMS Bridge |
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| </a> |
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| <a href="client-reconnection.html"> |
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| Client Reconnection and Session Reattachment |
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| </a> |
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| <a href="diverts.html"> |
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| Diverting and Splitting Message Flows |
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| </a> |
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| Core Bridges |
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| <li class="chapter " data-level="1.58" data-path="transformers.html"> |
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| <a href="transformers.html"> |
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| Transformers |
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| </a> |
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| <li class="chapter " data-level="1.59" data-path="duplicate-detection.html"> |
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| <a href="duplicate-detection.html"> |
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| Duplicate Message Detection |
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| </a> |
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| <li class="chapter " data-level="1.60" data-path="clusters.html"> |
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| <a href="clusters.html"> |
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| Clusters |
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| </a> |
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| <li class="chapter " data-level="1.61" data-path="federation.html"> |
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| <a href="federation.html"> |
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| Federation |
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| <li class="chapter " data-level="1.61.1" data-path="federation-address.html"> |
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| <a href="federation-address.html"> |
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| Address Federation |
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| </a> |
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| <li class="chapter " data-level="1.61.2" data-path="federation-queue.html"> |
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| <a href="federation-queue.html"> |
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| Queue Federation |
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| </a> |
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| <li class="chapter " data-level="1.62" data-path="ha.html"> |
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| High Availability and Failover |
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| </a> |
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| <li class="chapter " data-level="1.63" data-path="connection-routers.html"> |
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| Connection Routers |
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| </a> |
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| Graceful Server Shutdown |
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| </a> |
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| <li class="chapter " data-level="1.65" data-path="libaio.html"> |
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| <a href="libaio.html"> |
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| Libaio Native Libraries |
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| </a> |
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| <li class="chapter " data-level="1.66" data-path="thread-pooling.html"> |
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| <a href="thread-pooling.html"> |
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| Thread management |
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| </a> |
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| <a href="web-server.html"> |
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| Embedded Web Server |
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| </a> |
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| <a href="logging.html"> |
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| Logging |
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| </a> |
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| <a href="." >AMQP</a> |
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| <h1 id="amqp">AMQP</h1> |
| <p>Apache ActiveMQ Artemis supports the <a href="https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=amqp" target="_blank">AMQP |
| 1.0</a> |
| specification. By default there are <code>acceptor</code> elements configured to accept |
| AMQP connections on ports <code>61616</code> and <code>5672</code>.</p> |
| <p>See the general <a href="protocols-interoperability.html">Protocols and Interoperability</a> |
| chapter for details on configuring an <code>acceptor</code> for AMQP.</p> |
| <p>You can use <em>any</em> AMQP 1.0 compatible clients.</p> |
| <p>A short list includes:</p> |
| <ul> |
| <li><a href="https://qpid.apache.org/download.html" target="_blank">qpid clients</a></li> |
| <li><a href="https://blogs.apache.org/activemq/entry/using-net-libraries-with-activemq" target="_blank">.NET Clients</a></li> |
| <li><a href="https://github.com/noodlefrenzy/node-amqp10" target="_blank">Javascript NodeJS</a></li> |
| <li><a href="https://github.com/grs/rhea" target="_blank">Java Script RHEA</a></li> |
| <li>... and many others.</li> |
| </ul> |
| <h2 id="examples">Examples</h2> |
| <p>We have a few examples as part of the Artemis distribution:</p> |
| <ul> |
| <li>.NET: <ul> |
| <li>./examples/protocols/amqp/dotnet</li> |
| </ul> |
| </li> |
| <li>ProtonCPP<ul> |
| <li>./examples/protocols/amqp/proton-cpp</li> |
| <li>./examples/protocols/amqp/proton-clustered-cpp</li> |
| </ul> |
| </li> |
| <li>Ruby<ul> |
| <li>./examples/protocols/amqp/proton-ruby</li> |
| </ul> |
| </li> |
| <li>Java (Using the qpid JMS Client)<ul> |
| <li>./examples/protocols/amqp/queue</li> |
| </ul> |
| </li> |
| <li>Interceptors<ul> |
| <li>./examples/features/standard/interceptor-amqp</li> |
| <li>./examples/features/standard/broker-plugin</li> |
| </ul> |
| </li> |
| </ul> |
| <h2 id="message-conversions">Message Conversions</h2> |
| <p>The broker will not perform any message conversion to any other protocols when |
| sending AMQP and receiving AMQP.</p> |
| <p>However if you intend your message to be received by an AMQP JMS Client, you |
| must follow the <a href="https://www.oasis-open.org/committees/download.php/53086/amqp-bindmap-jms-v1.0-wd05.pdf" target="_blank">JMS Mapping |
| Conventions</a>. |
| If you send a body type that is not recognized by this specification the |
| conversion between AMQP and any other protocol will make it a Binary Message. |
| Make sure you follow these conventions if you intend to cross protocols or |
| languages. Especially on the message body.</p> |
| <p>A compatibility setting allows aligning the naming convention of AMQP queues |
| (JMS Durable and Shared Subscriptions) with CORE. For backwards compatibility |
| reasons, you need to explicitly enable this via broker configuration:</p> |
| <ul> |
| <li><code>amqp-use-core-subscription-naming</code><ul> |
| <li><code>true</code> - use queue naming convention that is aligned with CORE.</li> |
| <li><code>false</code> (default) - use older naming convention. </li> |
| </ul> |
| </li> |
| </ul> |
| <h2 id="intercepting-and-changing-messages">Intercepting and changing messages</h2> |
| <p>We don't recommend changing messages at the server's side for a few reasons:</p> |
| <ul> |
| <li>AMQP messages are meant to be immutable</li> |
| <li>The message won't be the original message the user sent</li> |
| <li>AMQP has the possibility of signing messages. The signature would be broken.</li> |
| <li>For performance reasons. We try not to re-encode (or even decode) messages.</li> |
| </ul> |
| <p>If regardless these recommendations you still need and want to intercept and |
| change AMQP messages, look at the aforementioned interceptor examples.</p> |
| <h2 id="amqp-and-security">AMQP and security</h2> |
| <p>The Apache ActiveMQ Artemis Server accepts the PLAIN, ANONYMOUS, and GSSAPI |
| SASL mechanism. These are implemented on the broker's <a href="security.html">security</a> |
| infrastructure.</p> |
| <h2 id="amqp-and-destinations">AMQP and destinations</h2> |
| <p>If an AMQP Link is dynamic then a temporary queue will be created and either |
| the remote source or remote target address will be set to the name of the |
| temporary queue. If the Link is not dynamic then the address of the remote |
| target or source will be used for the queue. In case it does not exist, |
| it will be auto-created if the settings allow.</p> |
| <h2 id="amqp-and-multicast-addresses-topics">AMQP and Multicast Addresses (Topics)</h2> |
| <p>Although AMQP has no notion of "topics" it is still possible to treat AMQP |
| consumers or receivers as subscriptions rather than just consumers on a queue. |
| By default any receiving link that attaches to an address that has only |
| <code>multicast</code> enabled will be treated as a subscription and a corresponding |
| subscription queue will be created. If the Terminus Durability is either |
| <code>UNSETTLED_STATE</code> or <code>CONFIGURATION</code> then the queue will be made durable |
| (similar to a JMS durable subscription) and given a name made up from the |
| container id and the link name, something like <code>my-container-id:my-link-name</code>. |
| If the Terminus Durability is configured as <code>NONE</code> then a volatile <code>multicast</code> |
| queue will be created.</p> |
| <h2 id="amqp-and-coordinations---handling-transactions">AMQP and Coordinations - Handling Transactions</h2> |
| <p>An AMQP links target can also be a Coordinator. A Coordinator is used to handle |
| transactions. If a coordinator is used then the underlying server session will |
| be transacted and will be either rolled back or committed via the coordinator.</p> |
| <blockquote> |
| <p><strong>Note:</strong></p> |
| <p>AMQP allows the use of multiple transactions per session, |
| <code>amqp:multi-txns-per-ssn</code>, however in this version of Apache ActiveMQ Artemis |
| will only support single transactions per session.</p> |
| </blockquote> |
| <h2 id="amqp-scheduling-message-delivery">AMQP scheduling message delivery</h2> |
| <p>An AMQP message can provide scheduling information that controls the time in |
| the future when the message will be delivered at the earliest. This |
| information is provided by adding a message annotation to the sent message.</p> |
| <p>There are two different message annotations that can be used to schedule a |
| message for later delivery:</p> |
| <ul> |
| <li><p><code>x-opt-delivery-time</code> |
| The specified value must be a positive long corresponding to the time the |
| message should be made available for delivery (in milliseconds).</p> |
| </li> |
| <li><p><code>x-opt-delivery-delay</code> |
| The specified value must be a positive long corresponding to the amount of |
| milliseconds after the broker receives the given message before it should be |
| made available for delivery.</p> |
| </li> |
| </ul> |
| <p>If both annotations are present in the same message then the broker will prefer |
| the more specific <code>x-opt-delivery-time</code> value.</p> |
| <h2 id="dlq-and-expiry-transfer">DLQ and Expiry transfer</h2> |
| <p>AMQP Messages will be copied before transferred to a DLQ or ExpiryQueue and will receive properties and annotations during this process.</p> |
| <p>The broker also keeps an internal only property (called extra property) that is not exposed to the clients, and those will also be filled during this process.</p> |
| <p>Here is a list of Annotations and Property names AMQP Messages will receive when transferred:</p> |
| <table> |
| <thead> |
| <tr> |
| <th>Annotation name</th> |
| <th>Internal Property Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>x-opt-ORIG-MESSAGE-ID</td> |
| <td>_AMQ_ORIG_MESSAGE_ID</td> |
| <td>The original message ID before the transfer</td> |
| </tr> |
| <tr> |
| <td>x-opt-ACTUAL-EXPIRY</td> |
| <td>_AMQ_ACTUAL_EXPIRY</td> |
| <td>When the expiry took place. Milliseconds since epoch times</td> |
| </tr> |
| <tr> |
| <td>x-opt-ORIG-QUEUE</td> |
| <td>_AMQ_ORIG_QUEUE</td> |
| <td>The original queue name before the transfer</td> |
| </tr> |
| <tr> |
| <td>x-opt-ORIG-ADDRESS</td> |
| <td>_AMQ_ORIG_ADDRESS</td> |
| <td>The original address name before the transfer</td> |
| </tr> |
| </tbody> |
| </table> |
| <h2 id="filtering-on-message-annotations">Filtering on Message Annotations</h2> |
| <p>It is possible to filter on messaging annotations if you use the prefix "m." before the annotation name.</p> |
| <p>For example if you want to filter messages sent to a specific destination, you could create your filter accordingly to this:</p> |
| <pre><code class="lang-java">ConnectionFactory factory = <span class="hljs-keyword">new</span> JmsConnectionFactory(<span class="hljs-string">"amqp://localhost:5672"</span>); |
| Connection connection = factory.createConnection(); |
| Session session = connection.createSession(<span class="hljs-keyword">false</span>, Session.AUTO_ACKNOWLEDGE); |
| connection.start(); |
| javax.jms.Queue queue = session.createQueue(<span class="hljs-string">"my-DLQ"</span>); |
| MessageConsumer consumer = session.createConsumer(queue, <span class="hljs-string">"\"m.x-opt-ORIG-ADDRESS\"='ORIGINAL_PLACE'"</span>); |
| Message message = consumer.receive(); |
| </code></pre> |
| <p>The broker will set internal properties. If you intend to filter after DLQ or Expiry you may choose the internal property names:</p> |
| <pre><code class="lang-java"><span class="hljs-comment">// Replace the consumer creation on the previous example:</span> |
| MessageConsumer consumer = session.createConsumer(queue, <span class="hljs-string">"_AMQ_ORIG_ADDRESS='ORIGINAL_PLACE'"</span>); |
| </code></pre> |
| <h2 id="configuring-amqp-idle-timeout">Configuring AMQP Idle Timeout</h2> |
| <p>It is possible to configure the AMQP Server's IDLE Timeout by setting the property amqpIdleTimeout in milliseconds on the acceptor.</p> |
| <p>This will make the server to send an AMQP frame open to the client, with your configured timeout / 2.</p> |
| <p>So, if you configured your AMQP Idle Timeout to be 60000, the server will tell the client to send frames every 30,000 milliseconds.</p> |
| <pre><code class="lang-xml"><span class="hljs-tag"><<span class="hljs-name">acceptor</span> <span class="hljs-attr">name</span>=<span class="hljs-string">"amqp"</span>></span>.... ;amqpIdleTimeout=<span class="hljs-tag"><<span class="hljs-name">configured-timeout</span>></span>; ..... <span class="hljs-tag"></<span class="hljs-name">acceptor</span>></span> |
| </code></pre> |
| <h3 id="disabling-keep-alive-checks">Disabling Keep alive checks</h3> |
| <p>if you set amqpIdleTimeout=0 that will tell clients to not sending keep alive packets towards the server. On this case |
| you will rely on TCP to determine when the socket needs to be closed.</p> |
| <pre><code class="lang-xml"><span class="hljs-tag"><<span class="hljs-name">acceptor</span> <span class="hljs-attr">name</span>=<span class="hljs-string">"amqp"</span>></span>.... ;amqpIdleTimeout=0; ..... <span class="hljs-tag"></<span class="hljs-name">acceptor</span>></span> |
| </code></pre> |
| <p>This contains a real example for configuring amqpIdleTimeout:</p> |
| <pre><code class="lang-xml"><span class="hljs-tag"><<span class="hljs-name">acceptor</span> <span class="hljs-attr">name</span>=<span class="hljs-string">"amqp"</span>></span>tcp://0.0.0.0:5672?amqpIdleTimeout=0;tcpSendBufferSize=1048576;tcpReceiveBufferSize=1048576;protocols=AMQP;useEpoll=true;amqpCredits=1000;amqpMinCredits=300;directDeliver=false;batchDelay=10<span class="hljs-tag"></<span class="hljs-name">acceptor</span>></span> |
| </code></pre> |
| <h2 id="web-sockets">Web Sockets</h2> |
| <p>Apache ActiveMQ Artemis also supports AMQP over <a href="https://html.spec.whatwg.org/multipage/web-sockets.html" target="_blank">Web |
| Sockets</a>. Modern web |
| browsers which support Web Sockets can send and receive AMQP messages.</p> |
| <p>AMQP over Web Sockets is supported via a normal AMQP acceptor:</p> |
| <pre><code class="lang-xml"><span class="hljs-tag"><<span class="hljs-name">acceptor</span> <span class="hljs-attr">name</span>=<span class="hljs-string">"amqp-ws-acceptor"</span>></span>tcp://localhost:5672?protocols=AMQP<span class="hljs-tag"></<span class="hljs-name">acceptor</span>></span> |
| </code></pre> |
| <p>With this configuration, Apache ActiveMQ Artemis will accept AMQP connections |
| over Web Sockets on the port <code>5672</code>. Web browsers can then connect to |
| <code>ws://<server>:5672</code> using a Web Socket to send and receive AMQP messages.</p> |
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