<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>The Pulsar C++ client · Apache Pulsar</title><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta name="generator" content="Docusaurus"/><meta name="description" content="## Supported platforms"/><meta name="docsearch:version" content="2.3.1"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="The Pulsar C++ client · Apache Pulsar"/><meta property="og:type" content="website"/><meta property="og:url" content="https://pulsar.apache.org/"/><meta property="og:description" content="## Supported platforms"/><meta name="twitter:card" content="summary"/><meta name="twitter:image" content="https://pulsar.apache.org/img/pulsar.svg"/><link rel="shortcut icon" href="/img/pulsar.ico"/><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/atom-one-dark.min.css"/><link rel="alternate" type="application/atom+xml" href="https://pulsar.apache.org/blog/atom.xml" title="Apache Pulsar Blog ATOM Feed"/><link rel="alternate" type="application/rss+xml" href="https://pulsar.apache.org/blog/feed.xml" title="Apache Pulsar Blog RSS Feed"/><link rel="stylesheet" href="/css/code-blocks-buttons.css"/><script type="text/javascript" src="https://buttons.github.io/buttons.js"></script><script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.0/clipboard.min.js"></script><script type="text/javascript" src="/js/custom.js"></script><script src="/js/scrollSpy.js"></script><link rel="stylesheet" href="/css/main.css"/><script src="/js/codetabs.js"></script></head><body class="sideNavVisible separateOnPageNav"><div class="fixedHeaderContainer"><div class="headerWrapper wrapper"><header><a href="/en"><img class="logo" src="/img/pulsar.svg" alt="Apache Pulsar"/></a><a href="/en/versions"><h3>2.3.1</h3></a><div class="navigationWrapper navigationSlider"><nav class="slidingNav"><ul class="nav-site nav-site-internal"><li class="siteNavGroupActive"><a href="/docs/en/2.3.1/getting-started-standalone" target="_self">Docs</a></li><li class=""><a href="/en/download" target="_self">Download</a></li><li class="siteNavGroupActive"><a href="/docs/en/2.3.1/client-libraries" target="_self">Clients</a></li><li class=""><a href="#restapis" target="_self">REST APIs</a></li><li class=""><a href="#cli" target="_self">Cli</a></li><li class=""><a href="/blog/" target="_self">Blog</a></li><li class=""><a href="#community" target="_self">Community</a></li><li class=""><a href="#apache" target="_self">Apache</a></li><li class=""><a href="https://pulsar-next.staged.apache.org/" target="_self">New Website (Beta)</a></li><span><li><a id="languages-menu" href="#"><img class="languages-icon" src="/img/language.svg" alt="Languages icon"/>English</a><div id="languages-dropdown" class="hide"><ul id="languages-dropdown-items"><li><a href="/docs/ja/2.3.1/client-libraries-cpp">日本語</a></li><li><a href="/docs/fr/2.3.1/client-libraries-cpp">Français</a></li><li><a href="/docs/ko/2.3.1/client-libraries-cpp">한국어</a></li><li><a href="/docs/zh-CN/2.3.1/client-libraries-cpp">中文</a></li><li><a href="/docs/zh-TW/2.3.1/client-libraries-cpp">繁體中文</a></li><li><a href="https://crowdin.com/project/apache-pulsar" target="_blank" rel="noreferrer noopener">Help Translate</a></li></ul></div></li><script>
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href="/docs/en/2.3.1/security-extending">Extending</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Client Libraries</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/client-libraries-java">Java</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/client-libraries-go">Go</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/client-libraries-python">Python</a></li><li class="navListItem navListItemActive"><a class="navItem" href="/docs/en/2.3.1/client-libraries-cpp">C++</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/client-libraries-websocket">WebSocket</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Admin API</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/admin-api-overview">Overview</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/admin-api-clusters">Clusters</a></li><li 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class="navItem" href="/docs/en/2.3.1/adaptors-kafka">Kafka client wrapper</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/adaptors-spark">Apache Spark</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/adaptors-storm">Apache Storm</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Cookbooks</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/cookbooks-tiered-storage">Tiered Storage</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/cookbooks-compaction">Topic compaction</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/cookbooks-deduplication">Message deduplication</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/cookbooks-non-persistent">Non-persistent messaging</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/cookbooks-partitioned">Partitioned Topics</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/cookbooks-retention-expiry">Message retention and expiry</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/cookbooks-encryption">Encryption</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/cookbooks-message-queue">Message queue</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/cookbooks-bookkeepermetadata">BookKeeper Ledger Metadata</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Development</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/develop-tools">Simulation tools</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/developing-binary-protocol">Binary protocol</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/develop-schema">Custom schema storage</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/develop-load-manager">Modular load manager</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/develop-cpp">Building Pulsar C++ client</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Reference</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/reference-terminology">Terminology</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/reference-cli-tools">Pulsar CLI tools</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.3.1/reference-configuration">Pulsar configuration</a></li></ul></div></div></section></div><script>
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<p>The Pulsar C++ client has been successfully tested on <strong>MacOS</strong> and <strong>Linux</strong>.</p>
<h2><a class="anchor" aria-hidden="true" id="linux"></a><a href="#linux" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Linux</h2>
<h3><a class="anchor" aria-hidden="true" id="install"></a><a href="#install" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Install</h3>
<blockquote>
<p>Since the 2.1.0 release, Pulsar ships pre-built RPM and Debian packages. You can choose to download
and install those packages instead of building them yourself.</p>
</blockquote>
<h4><a class="anchor" aria-hidden="true" id="rpm"></a><a href="#rpm" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>RPM</h4>
<table>
<thead>
<tr><th>Link</th><th>Crypto files</th></tr>
</thead>
<tbody>
<tr><td><a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/RPMS/apache-pulsar-client-2.3.1-1.x86_64.rpm">client</a></td><td><a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/RPMS/apache-pulsar-client-2.3.1-1.x86_64.rpm.asc">asc</a>, <a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/RPMS/apache-pulsar-client-2.3.1-1.x86_64.rpm.sha512">sha512</a></td></tr>
<tr><td><a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/RPMS/apache-pulsar-client-debuginfo-2.3.1-1.x86_64.rpm">client-debuginfo</a></td><td><a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/RPMS/apache-pulsar-client-debuginfo-2.3.1-1.x86_64.rpm.asc">asc</a>,  <a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/RPMS/apache-pulsar-client-debuginfo-2.3.1-1.x86_64.rpm.sha512">sha512</a></td></tr>
<tr><td><a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/RPMS/apache-pulsar-client-devel-2.3.1-1.x86_64.rpm">client-devel</a></td><td><a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/RPMS/apache-pulsar-client-devel-2.3.1-1.x86_64.rpm.asc">asc</a>,  <a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/RPMS/apache-pulsar-client-devel-2.3.1-1.x86_64.rpm.sha512">sha512</a></td></tr>
</tbody>
</table>
<p>To install a RPM package, download the RPM packages and install them using the following command:</p>
<pre><code class="hljs css language-bash">$ rpm -ivh apache-pulsar-client*.rpm
</code></pre>
<h4><a class="anchor" aria-hidden="true" id="deb"></a><a href="#deb" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>DEB</h4>
<table>
<thead>
<tr><th>Link</th><th>Crypto files</th></tr>
</thead>
<tbody>
<tr><td><a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/DEB/apache-pulsar-client.deb">client</a></td><td><a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/DEB/apache-pulsar-client.deb.asc">asc</a>, <a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/DEB/apache-pulsar-client.deb.sha512">sha512</a></td></tr>
<tr><td><a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/DEB/apache-pulsar-client-dev.deb">client-devel</a></td><td><a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/DEB/apache-pulsar-client-dev.deb.asc">asc</a>,  <a href="https://archive.apache.org/dist/pulsar/pulsar-2.3.1/DEB/apache-pulsar-client-dev.deb.sha512">sha512</a></td></tr>
</tbody>
</table>
<p>To install a DEB package, download the DEB packages and install them using the following command:</p>
<pre><code class="hljs css language-bash">$ apt install ./apache-pulsar-client*.deb
</code></pre>
<h3><a class="anchor" aria-hidden="true" id="build"></a><a href="#build" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Build</h3>
<blockquote>
<p>If you want to build RPM and Debian packages off latest master, you can follow the instructions
below to do so. All the instructions are run at the root directory of your cloned Pulsar
repo.</p>
</blockquote>
<p>There are recipes that build RPM and Debian packages containing a
statically linked <code>libpulsar.so</code> / <code>libpulsar.a</code> with all the required
dependencies.</p>
<p>To build the C++ library packages, first build the Java packages:</p>
<pre><code class="hljs css language-shell">mvn install -DskipTests
</code></pre>
<h4><a class="anchor" aria-hidden="true" id="rpm-1"></a><a href="#rpm-1" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>RPM</h4>
<pre><code class="hljs css language-shell">pulsar-client-cpp/pkg/rpm/docker-build-rpm.sh
</code></pre>
<p>This will build the RPM inside a Docker container and it will leave the RPMs
in <code>pulsar-client-cpp/pkg/rpm/RPMS/x86_64/</code>.</p>
<table>
<thead>
<tr><th>Package name</th><th>Content</th></tr>
</thead>
<tbody>
<tr><td>pulsar-client</td><td>Shared library <code>libpulsar.so</code></td></tr>
<tr><td>pulsar-client-devel</td><td>Static library <code>libpulsar.a</code> and C++ and C headers</td></tr>
<tr><td>pulsar-client-debuginfo</td><td>Debug symbols for <code>libpulsar.so</code></td></tr>
</tbody>
</table>
<h4><a class="anchor" aria-hidden="true" id="deb-1"></a><a href="#deb-1" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Deb</h4>
<p>To build Debian packages:</p>
<pre><code class="hljs css language-shell">pulsar-client-cpp/pkg/deb/docker-build-deb.sh
</code></pre>
<p>Debian packages will be created at <code>pulsar-client-cpp/pkg/deb/BUILD/DEB/</code></p>
<table>
<thead>
<tr><th>Package name</th><th>Content</th></tr>
</thead>
<tbody>
<tr><td>pulsar-client</td><td>Shared library <code>libpulsar.so</code></td></tr>
<tr><td>pulsar-client-dev</td><td>Static library <code>libpulsar.a</code> and C++ and C headers</td></tr>
</tbody>
</table>
<h2><a class="anchor" aria-hidden="true" id="macos"></a><a href="#macos" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>MacOS</h2>
<p>Pulsar releases are available through the <a href="https://brew.sh/">Homebrew</a> core repository. You can install the C++ client
library with:</p>
<pre><code class="hljs css language-shell">brew install libpulsar
</code></pre>
<p>This will install the package with the library and headers.</p>
<h2><a class="anchor" aria-hidden="true" id="connection-urls"></a><a href="#connection-urls" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Connection URLs</h2>
<p>To connect to Pulsar using client libraries, you need to specify a Pulsar protocol URL.</p>
<p>Pulsar protocol URLs are assigned to specific clusters, use the pulsar URI scheme and have a default port of 6650. Here’s an example for localhost:</p>
<pre><code class="hljs css language-http">pulsar://localhost:6650
</code></pre>
<p>A URL for a production Pulsar cluster may look something like this:</p>
<pre><code class="hljs css language-http">pulsar://pulsar.us-west.example.com:6650
</code></pre>
<p>If you’re using TLS authentication, the URL will look like something like this:</p>
<pre><code class="hljs css language-http">pulsar+ssl://pulsar.us-west.example.com:6651
</code></pre>
<h2><a class="anchor" aria-hidden="true" id="consumer"></a><a href="#consumer" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Consumer</h2>
<pre><code class="hljs css language-c++"><span class="hljs-function"><span class="hljs-built_in">Client</span> <span class="hljs-title">client</span><span class="hljs-params">(<span class="hljs-string">"pulsar://localhost:6650"</span>)</span></span>;

Consumer consumer;
Result result = client.subscribe(<span class="hljs-string">"my-topic"</span>, <span class="hljs-string">"my-subscribtion-name"</span>, consumer);
<span class="hljs-keyword">if</span> (result != ResultOk) {
    LOG_ERROR(<span class="hljs-string">"Failed to subscribe: "</span> &lt;&lt; result);
    <span class="hljs-keyword">return</span> <span class="hljs-number">-1</span>;
}

Message msg;

<span class="hljs-keyword">while</span> (<span class="hljs-literal">true</span>) {
    consumer.receive(msg);
    LOG_INFO(<span class="hljs-string">"Received: "</span> &lt;&lt; msg
            &lt;&lt; <span class="hljs-string">"  with payload '"</span> &lt;&lt; msg.getDataAsString() &lt;&lt; <span class="hljs-string">"'"</span>);

    consumer.acknowledge(msg);
}

client.<span class="hljs-built_in">close</span>();
</code></pre>
<h2><a class="anchor" aria-hidden="true" id="producer"></a><a href="#producer" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Producer</h2>
<pre><code class="hljs css language-c++"><span class="hljs-function"><span class="hljs-built_in">Client</span> <span class="hljs-title">client</span><span class="hljs-params">(<span class="hljs-string">"pulsar://localhost:6650"</span>)</span></span>;

Producer producer;
Result result = client.createProducer(<span class="hljs-string">"my-topic"</span>, producer);
<span class="hljs-keyword">if</span> (result != ResultOk) {
    LOG_ERROR(<span class="hljs-string">"Error creating producer: "</span> &lt;&lt; result);
    <span class="hljs-keyword">return</span> <span class="hljs-number">-1</span>;
}

<span class="hljs-comment">// Publish 10 messages to the topic</span>
<span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> i = <span class="hljs-number">0</span>; i &lt; <span class="hljs-number">10</span>; i++){
    Message msg = MessageBuilder().setContent(<span class="hljs-string">"my-message"</span>).build();
    Result res = producer.send(msg);
    LOG_INFO(<span class="hljs-string">"Message sent: "</span> &lt;&lt; res);
}
client.<span class="hljs-built_in">close</span>();
</code></pre>
<h2><a class="anchor" aria-hidden="true" id="authentication"></a><a href="#authentication" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Authentication</h2>
<pre><code class="hljs css language-cpp">ClientConfiguration config = ClientConfiguration();
config.setUseTls(<span class="hljs-literal">true</span>);
config.setTlsTrustCertsFilePath(<span class="hljs-string">"/path/to/cacert.pem"</span>);
config.setTlsAllowInsecureConnection(<span class="hljs-literal">false</span>);
config.setAuth(pulsar::AuthTls::create(
            <span class="hljs-string">"/path/to/client-cert.pem"</span>, <span class="hljs-string">"/path/to/client-key.pem"</span>););

<span class="hljs-function">Client <span class="hljs-title">client</span><span class="hljs-params">(<span class="hljs-string">"pulsar+ssl://my-broker.com:6651"</span>, config)</span></span>;
</code></pre>
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