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<title>4.&nbsp;Dynamic Compilation</title><link rel="stylesheet" type="text/css" href="css/manual-multipage.css"><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="multi_spring-cloud-function.html" title="Spring Cloud Function"><link rel="up" href="multi_spring-cloud-function.html" title="Spring Cloud Function"><link rel="prev" href="multi__building_and_running_a_function.html" title="3.&nbsp;Building and Running a Function"><link rel="next" href="multi__function_catalog_and_flexible_function_signatures.html" title="5.&nbsp;Function Catalog and Flexible Function Signatures"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">4.&nbsp;Dynamic Compilation</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="multi__building_and_running_a_function.html">Prev</a>&nbsp;</td><th width="60%" align="center">&nbsp;</th><td width="20%" align="right">&nbsp;<a accesskey="n" href="multi__function_catalog_and_flexible_function_signatures.html">Next</a></td></tr></table><hr></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="_dynamic_compilation" href="#_dynamic_compilation"></a>4.&nbsp;Dynamic Compilation</h1></div></div></div><p>There is a sample app that uses the function compiler to create a
<title>8.&nbsp;Dynamic Compilation</title><link rel="stylesheet" type="text/css" href="css/manual-multipage.css"><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="multi_spring-cloud-function.html" title="Spring Cloud Function"><link rel="up" href="multi_spring-cloud-function.html" title="Spring Cloud Function"><link rel="prev" href="multi__deploying_a_packaged_function.html" title="7.&nbsp;Deploying a Packaged Function"><link rel="next" href="multi__serverless_platform_adapters.html" title="9.&nbsp;Serverless Platform Adapters"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">8.&nbsp;Dynamic Compilation</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="multi__deploying_a_packaged_function.html">Prev</a>&nbsp;</td><th width="60%" align="center">&nbsp;</th><td width="20%" align="right">&nbsp;<a accesskey="n" href="multi__serverless_platform_adapters.html">Next</a></td></tr></table><hr></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="_dynamic_compilation" href="#_dynamic_compilation"></a>8.&nbsp;Dynamic Compilation</h1></div></div></div><p>There is a sample app that uses the function compiler to create a
function from a configuration property. The vanilla "function-sample"
also has that feature. And there are some examples that you can run to
also has that feature. And there are some scripts that you can run to
see the compilation happening at run time. To run these examples,
change into the <code class="literal">scripts</code> directory:</p><pre class="screen">cd scripts</pre><p>Also, start a RabbitMQ server locally (e.g. execute <code class="literal">rabbitmq-server</code>).</p><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_start_the_function_registry_service" href="#_start_the_function_registry_service"></a>4.1&nbsp;Start the Function Registry Service:</h2></div></div></div><pre class="screen">./function-registry.sh</pre></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_register_a_function" href="#_register_a_function"></a>4.2&nbsp;Register a Function:</h2></div></div></div><pre class="screen">./registerFunction.sh -n uppercase -f "f-&gt;f.map(s-&gt;s.toString().toUpperCase())"</pre></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_run_a_rest_microservice_using_that_function" href="#_run_a_rest_microservice_using_that_function"></a>4.3&nbsp;Run a REST Microservice using that Function:</h2></div></div></div><pre class="screen">./web.sh -f uppercase -p 9000
curl -H "Content-Type: text/plain" -H "Accept: text/plain" localhost:9000/uppercase -d foo</pre></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_register_a_supplier" href="#_register_a_supplier"></a>4.4&nbsp;Register a Supplier:</h2></div></div></div><pre class="screen">./registerSupplier.sh -n words -f "()-&gt;Flux.just(\"foo\",\"bar\")"</pre></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_run_a_rest_microservice_using_that_supplier" href="#_run_a_rest_microservice_using_that_supplier"></a>4.5&nbsp;Run a REST Microservice using that Supplier:</h2></div></div></div><pre class="screen">./web.sh -s words -p 9001
curl -H "Accept: application/json" localhost:9001/words</pre></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_register_a_consumer" href="#_register_a_consumer"></a>4.6&nbsp;Register a Consumer:</h2></div></div></div><pre class="screen">./registerConsumer.sh -n print -t String -f "System.out::println"</pre></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_run_a_rest_microservice_using_that_consumer" href="#_run_a_rest_microservice_using_that_consumer"></a>4.7&nbsp;Run a REST Microservice using that Consumer:</h2></div></div></div><pre class="screen">./web.sh -c print -p 9002
curl -X POST -H "Content-Type: text/plain" -d foo localhost:9002/print</pre></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_run_stream_processing_microservices" href="#_run_stream_processing_microservices"></a>4.8&nbsp;Run Stream Processing Microservices:</h2></div></div></div><p>First register a streaming words supplier:</p><pre class="screen">./registerSupplier.sh -n wordstream -f "()-&gt;Flux.interval(Duration.ofMillis(1000)).map(i-&gt;\"message-\"+i)"</pre><p>Then start the source (supplier), processor (function), and sink (consumer) apps
change into the <code class="literal">scripts</code> directory:</p><pre class="screen">cd scripts</pre><p>Also, start a RabbitMQ server locally (e.g. execute <code class="literal">rabbitmq-server</code>).</p><p>Start the Function Registry Service:</p><pre class="screen">./function-registry.sh</pre><p>Register a Function:</p><pre class="screen">./registerFunction.sh -n uppercase -f "f-&gt;f.map(s-&gt;s.toString().toUpperCase())"</pre><p>Run a REST Microservice using that Function:</p><pre class="screen">./web.sh -f uppercase -p 9000
curl -H "Content-Type: text/plain" -H "Accept: text/plain" localhost:9000/uppercase -d foo</pre><p>Register a Supplier:</p><pre class="screen">./registerSupplier.sh -n words -f "()-&gt;Flux.just(\"foo\",\"bar\")"</pre><p>Run a REST Microservice using that Supplier:</p><pre class="screen">./web.sh -s words -p 9001
curl -H "Accept: application/json" localhost:9001/words</pre><p>Register a Consumer:</p><pre class="screen">./registerConsumer.sh -n print -t String -f "System.out::println"</pre><p>Run a REST Microservice using that Consumer:</p><pre class="screen">./web.sh -c print -p 9002
curl -X POST -H "Content-Type: text/plain" -d foo localhost:9002/print</pre><p>Run Stream Processing Microservices:</p><p>First register a streaming words supplier:</p><pre class="screen">./registerSupplier.sh -n wordstream -f "()-&gt;Flux.interval(Duration.ofMillis(1000)).map(i-&gt;\"message-\"+i)"</pre><p>Then start the source (supplier), processor (function), and sink (consumer) apps
(in reverse order):</p><pre class="screen">./stream.sh -p 9103 -i uppercaseWords -c print
./stream.sh -p 9102 -i words -f uppercase -o uppercaseWords
./stream.sh -p 9101 -s wordstream -o words</pre><p>The output will appear in the console of the sink app (one message per second, converted to uppercase):</p><pre class="screen">MESSAGE-0
@@ -20,4 +20,4 @@ MESSAGE-6
MESSAGE-7
MESSAGE-8
MESSAGE-9
...</pre></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="multi__building_and_running_a_function.html">Prev</a>&nbsp;</td><td width="20%" align="center">&nbsp;</td><td width="40%" align="right">&nbsp;<a accesskey="n" href="multi__function_catalog_and_flexible_function_signatures.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">3.&nbsp;Building and Running a Function&nbsp;</td><td width="20%" align="center"><a accesskey="h" href="multi_spring-cloud-function.html">Home</a></td><td width="40%" align="right" valign="top">&nbsp;5.&nbsp;Function Catalog and Flexible Function Signatures</td></tr></table></div></body></html>
...</pre></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="multi__deploying_a_packaged_function.html">Prev</a>&nbsp;</td><td width="20%" align="center">&nbsp;</td><td width="40%" align="right">&nbsp;<a accesskey="n" href="multi__serverless_platform_adapters.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">7.&nbsp;Deploying a Packaged Function&nbsp;</td><td width="20%" align="center"><a accesskey="h" href="multi_spring-cloud-function.html">Home</a></td><td width="40%" align="right" valign="top">&nbsp;9.&nbsp;Serverless Platform Adapters</td></tr></table></div></body></html>