ce8f90902c
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1028659 13f79535-47bb-0310-9956-ffa450edef68
111 lines
4.1 KiB
Text
111 lines
4.1 KiB
Text
Hello World Erlang Service Sample
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=================================
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This sample demonstrates an SCA service that uses a Erlang binding
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The README in the samples directory (the directory above this) provides
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general instructions about building and running samples. Take a look there
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first.
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In order to run Erlang samples you need to have Erlang/OTP distribution installed -
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epmd binary is required in your system path. See http://erlang.org for downloads.
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If you just want to run it to see what happens open a command prompt, navigate
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to this sample directory and do:
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ant run
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OR if you don't have ant, on Windows do
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java -cp ..\..\lib\tuscany-sca-manifest.jar;target\sample-helloworld-erlang-service.jar helloworld.HelloWorldServer
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and on *nix do
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java -cp ../../lib/tuscany-sca-manifest.jar:target/sample-helloworld-erlang-service.jar helloworld.HelloWorldServer
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Now the server is started you can use the helloworld-erlang-reference sample to
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exercise it.
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Sample Overview
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---------------
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The sample provides a single component that is wired to a service with a
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Erlang binding.
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helloworld-erlang-service/
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src/
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main/
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java/
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helloworld/
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HelloWorldService.java - interface description for
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HelloWorldServiceComponent
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HelloWorldImpl.java - component implementation
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HelloWorldServer.java - starts the SCA Runtime and
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deploys the helloworlderlangservice
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.composite and then waits for the
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service to be called via Erlang
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resources/
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helloworlderlangservice.composite - the SCA assembly for this sample
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test/
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java/
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helloworld/
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HelloWorldErlangServerTestCase.java - JUnit test case
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dynaignore/ - internal Java classes for ignoring test
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in case of missing Erlang/OTP distribution
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helloworld-service.png - a pictorial representation of the
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sample .composite file
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build.xml - the Ant build file
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pom.xml - the Maven build file
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Building And Running The Sample Using Ant
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-----------------------------------------
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With the binary distribution the sample can be built and run using Ant using the
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following commands
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cd helloworld-erlang-service
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ant compile
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ant run
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You should see the following output from the run target.
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run:
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[java] EPMD server started
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[java] 2009-05-26 11:59:07 org.apache.tuscany.sca.node.impl.NodeImpl <init>
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[java] INFO: Creating node: helloworlderlangservice.composite
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[java] 2009-05-26 11:59:08 org.apache.tuscany.sca.node.impl.NodeImpl configureNode
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[java] 2009-05-26 11:59:08 org.apache.tuscany.sca.node.impl.NodeImpl configureNode
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[java] 2009-05-26 11:59:08 org.apache.tuscany.sca.node.impl.NodeImpl start
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[java] INFO: Starting node: helloworlderlangservice.composite
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[java] HelloWorld server started (press enter to shutdown)
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As this point the SCA service is exposed as a Erlang module via Erlang RPC which is
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started automatically by the SCA runtime. To stop the server just press
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enter.
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To exercise the service run up the helloworld-erlang-reference sample. Take a look at
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the README in that sample and you will see you need the following commands
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cd helloworld-erlang-reference
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ant run
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Building Sample Using Maven
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-------------------------------------------
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With either the binary or source distributions the sample can be built
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using Maven as follows.
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cd helloworld-erlang-service
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mvn
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You should see the following output
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...
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[INFO] ------------------------------------------------------------------------
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[INFO] BUILD SUCCESSFUL
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[INFO] ------------------------------------------------------------------------
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[INFO] Total time: 15 seconds
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[INFO] Finished at: Wed Jul 02 12:50:24 BST 2008
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[INFO] Final Memory: 13M/51M
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[INFO] ------------------------------------------------------------------------
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This shows that the module has compiled successfully.
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