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Here, I'll walk you through the java source code, responsible for starting the [AAS Registry](What-am-I-looking-at-here#registry). Additional startup procedures are explained in the documentation for the [`start_component.sh`](start_component.sh) and the [`run_demo.sh`](run_demo.sh) scripts.
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Here, I'll walk you through the java source code, responsible for starting the [AAS Registry](What-am-I-looking-at-here#registry). Additional startup procedures are explained in the documentation for the [`start_component.sh`](implementation/start_component.sh) and the [`run_demo.sh`](run_demo.sh) scripts.
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The discussed file can be found [here](https://gitlab.hrz.tu-chemnitz.de/s6869070--tu-dresden.de/vws-spielwiese/-/blob/b1802bdd98650bdb666f03483f1e13c7f99bf4b8/basyx.lichterkette/src/main/java/de/olipar/basyx/lichterkette/RegistryServer.java).
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The discussed file can be found [here](https://gitlab.hrz.tu-chemnitz.de/vws-demo/vws-spielwiese/-/blob/64e67bdaae14ef6945ab3e73b5a9c70c9c1ced67/basyx.lichterkette/src/main/java/de/olipar/basyx/lichterkette/RegistryServer.java).
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This is very similar to the [AAS Server starter](AAS-Server-starter-walkthrough).
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This is very similar to the [AAS Server starter](implementation/AAS-Server-starter-walkthrough).
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We'll skip the license header, imports and comments, as they are either pretty much self explanatory or not the product of conscious development effort.
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```java
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public class RegistryServer {
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private static final org.slf4j.Logger logger = LoggerFactory.getLogger(RegistryServer.class);
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```
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At the start of the `RegistryServer`-class, we aquire a logger object, to which all console output will be passed. This is not only used internally by BaSyx too, but allows us to easily utilize different loglevels, such as `INFO`, `WARN` and `ERROR`, indicating severity.
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... | ... | @@ -22,7 +21,7 @@ We then define a `main`-method, as this class is executable. It will be called t |
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final int HOSTPORT = Common.getHostPort();
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logger.info("Local host port is set to " + HOSTPORT);
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```
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Here, we invoke the static method `getHostPort()` of the [`Common`-class](Common-class-walkthrough). The port on which to host the AAS Registry is grabbed from an environment variable, if present and set to a fallback value if not. The set port is then logged via the `Logger` object acquired above.
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Here, we invoke the static method `getHostPort()` of the [`Common`-class](implementation/Common-class-walkthrough). The port on which to host the AAS Registry is grabbed from an environment variable, if present and set to a fallback value if not. The set port is then logged via the `Logger` object acquired above.
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```java
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startRegistry(HOSTPORT);
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... | ... | |