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<title data-rh="true">Delayed Message Sending | RocketMQ</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://your-docusaurus-test-site.com/docs/4.x/producer/04message3"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docusaurus_version" content="current"><meta data-rh="true" name="docusaurus_tag" content="docs-default-current"><meta data-rh="true" name="docsearch:version" content="current"><meta data-rh="true" name="docsearch:docusaurus_tag" content="docs-default-current"><meta data-rh="true" property="og:title" content="Delayed Message Sending | RocketMQ"><meta data-rh="true" name="description" content="The delayed message sending means that when a message is sent to Apache RocketMQ, instead of delivering the message immediately, it would be delivered to the Consumer for consumption after delaying a certain period of time."><meta data-rh="true" property="og:description" content="The delayed message sending means that when a message is sent to Apache RocketMQ, instead of delivering the message immediately, it would be delivered to the Consumer for consumption after delaying a certain period of time."><link data-rh="true" rel="icon" href="/img/favicon.ico"><link data-rh="true" rel="canonical" href="https://your-docusaurus-test-site.com/docs/4.x/producer/04message3"><link data-rh="true" rel="alternate" href="https://your-docusaurus-test-site.com/zh/docs/4.x/producer/04message3" hreflang="zh"><link data-rh="true" rel="alternate" href="https://your-docusaurus-test-site.com/docs/4.x/producer/04message3" hreflang="en"><link data-rh="true" rel="alternate" href="https://your-docusaurus-test-site.com/docs/4.x/producer/04message3" hreflang="x-default"><link data-rh="true" rel="preconnect" href="https://R2IYF7ETH7-dsn.algolia.net" crossorigin="anonymous"><link rel="alternate" type="application/rss+xml" href="/blog/rss.xml" title="RocketMQ RSS Feed">
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itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Delayed Message Sending</span><meta itemprop="position" content="2"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: 4.x</span><div class="theme-doc-markdown markdown"><h1>Delayed Message Sending</h1><p>The delayed message sending means that when a message is sent to Apache RocketMQ, instead of delivering the message immediately, it would be delivered to the Consumer for consumption after delaying a certain period of time.</p><p>Apache RocketMQ supports a total of 18 levels of delayed delivery, the details are as follows:</p><table><thead><tr><th>delay level</th><th>delay time</th><th>delay level</th><th>delay time</th></tr></thead><tbody><tr><td>1</td><td>1s</td><td>10</td><td>6min</td></tr><tr><td>2</td><td>5s</td><td>11</td><td>7min</td></tr><tr><td>3</td><td>10s</td><td>12</td><td>8min</td></tr><tr><td>4</td><td>30s</td><td>13</td><td>9min</td></tr><tr><td>5</td><td>1min</td><td>14</td><td>10min</td></tr><tr><td>6</td><td>2min</td><td>15</td><td>20min</td></tr><tr><td>7</td><td>3min</td><td>16</td><td>30min</td></tr><tr><td>8</td><td>4min</td><td>17</td><td>1h</td></tr><tr><td>9</td><td>5min</td><td>18</td><td>2h</td></tr></tbody></table><p>The sample code for the delayed message sending is as follows:</p><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">public class ScheduledMessageProducer {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> public static void main(String[] args) throws Exception {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> // Instantiate a producer to send scheduled messages</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> DefaultMQProducer producer = new DefaultMQProducer(&quot;ExampleProducerGroup&quot;);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> // Launch producer</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> producer.start();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> int totalMessagesToSend = 100;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> for (int i = 0; i &lt; totalMessagesToSend; i++) {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> Message message = new Message(&quot;TestTopic&quot;, (&quot;Hello scheduled message &quot; + i).getBytes());</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> // This message will be delivered to consumer 10 seconds later.</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> message.setDelayTimeLevel(3);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> // Send the message</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> producer.send(message);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> // Shutdown producer after use.</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> producer.shutdown();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><div class="theme-admonition theme-admonition-tip alert alert--success admonition_LlT9"><div class="admonitionHeading_tbUL"><span class="admonitionIcon_kALy"><svg viewBox="0 0 12 16"><path fill-rule="evenodd" d="M6.5 0C3.48 0 1 2.19 1 5c0 .92.55 2.25 1 3 1.34 2.25 1.78 2.78 2 4v1h5v-1c.22-1.22.66-1.75 2-4 .45-.75 1-2.08 1-3 0-2.81-2.48-5-5.5-5zm3.64 7.48c-.25.44-.47.8-.67 1.11-.86 1.41-1.25 2.06-1.45 3.23-.02.05-.02.11-.02.17H5c0-.06 0-.13-.02-.17-.2-1.17-.59-1.83-1.45-3.23-.2-.31-.42-.67-.67-1.11C2.44 6.78 2 5.65 2 5c0-2.2 2.02-4 4.5-4 1.22 0 2.36.42 3.22 1.19C10.55 2.94 11 3.94 11 5c0 .66-.44 1.78-.86 2.48zM4 14h5c-.23 1.14-1.3 2-2.5 2s-2.27-.86-2.5-2z"></path></svg></span>tip</div><div class="admonitionContent_S0QG"><p>The most important thing is to set the delay level for the message. In the sample code above, the delay level is set to 3, which means that after the sender sends the message, it would take 10s for the consumer to receive it.</p></div></div></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/apache/rocketmq-site/tree/new-official-website/docs/02-producer/04message3.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_Z9Sw" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_vwxv"></div></div></footer></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages navigation"><a class="pagination-nav__link pagination-nav__link--prev" 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