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      <h4 style='color: #999'>Guidelines</h4>
      <h2>Contribution guidelines for OpenMessaging</h2>
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      <p>We welcome contributions to all the repositories in OpenMessaging organization. <i class="fa fa-github" aria-hidden="true"></i> <a href="https://github.com/openmessaging/">OpenMessaging</a>, please fork the repositories and start submiting pull requests.</p>
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    <h3>OpenMessaging Specification</h3>
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    <p>The <i class="fa fa-github" aria-hidden="true"></i> <a href="https://github.com/openmessaging/specification">specification</a> repository is the place to maintain OpenMessaging specification, related documentations, and so on.</p> 
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    <h3>OpenMessaging Ecosystem</h3>
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    <p>OpenMessaging would develop three kinds of ecosystem, to integrate different cloud platforms, big data/streaming communities, and other traditional software suites, please refer to <i class="fa fa-github" aria-hidden="true"></i> <a href="https://github.com/openmessaging/openmessaging-ecosystem-java">Ecosystem</a></p>
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    	<li><p>Appender, to collect log data from log4j, log4j2, logback, etc</p></li>
    	<li><p>Connector, to connect distributed systems with beam, flink, fluentd, spark, etc</p></li>
    	<li><p>Replicator, to integrate different kinds of database, like mysql, hbase, redis, etc </p></li>
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    <h3>OpenMessaging Multi-Language APIs</h3>
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    <p>OpenMessaging would provide standard APIs for mainstream languages, we also welcome contributions to these APIs or implementation in your community.</p>
    <ul>
    	<li><p><i class="fa fa-github" aria-hidden="true"></i> <a href="https://github.com/openmessaging/openmessaging-java/">openmessaging-java</a></p></li>
    	<li><p><i class="fa fa-github" aria-hidden="true"></i> <a href="https://github.com/openmessaging/openmessaging-python/">openmessaging-python</a></p></li>
    	<li><p><i class="fa fa-github" aria-hidden="true"></i> <a href="https://github.com/openmessaging/openmessaging-php/">openmessaging-php</a></p></li>
    	<li><p><i class="fa fa-github" aria-hidden="true"></i> <a href="https://github.com/openmessaging/openmessaging-cpp/">openmessaging-cpp</a></p></li>
    	<li><p><i class="fa fa-github" aria-hidden="true"></i> <a href="https://github.com/openmessaging/openmessaging-go/">openmessaging-go</a></p></li>
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    <h3>OpenMessaging Benchmark</h3>
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    <p>The OpenMessaging Benchmark Framework is a suite of tools that make it easy to benchmark distributed messaging systems in the cloud. The goal of the OpenMessaging Benchmark Framework is to provide benchmarking suites for an ever-expanding variety of messaging platforms and build a DB-Engines like comprehensive evaluation standard. Please refer to <i class="fa fa-github" aria-hidden="true"></i> <a href="https://github.com/openmessaging/openmessaging-benchmark">openMessaging-benchmark</a></p>
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