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org.gecko.playground.exchange.impl/bin/org/gecko/playground/exchange/impl/Subscriber.class
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| # `org.gecko.playground.http.jersey` | ||
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| This project is just a companion bundle that shows OSGi *@Requirement* annotations in *@RequireJersey* | ||
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| # `org.gecko.playground.httpwhiteboard` | ||
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| This project shows how to use Jakarta Servlets in OSGi using the Servlet whiteboard. | ||
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| It contains a Servlets, registered as services and static resource configurations. | ||
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| The URLs are like this: | ||
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| * *HelloWorldServlet* - [http://localhost:8080/hello](http://localhost:8080/hello) | ||
| * *ResourceService* for static resources: | ||
| * [http://localhost:8080/myapp/index.html](http://localhost:8080/myapp/index.html) or | ||
| * [http://localhost:8080/myapp/d3-demo2.html](http://localhost:8080/myapp/d3-demo2.html) | ||
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| # `org.gecko.playground.jaxb` | ||
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| This project show an OSGi setup for JAXB. The important thing is to make JAXB find its implementation in an post Java 8 setup. | ||
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| For this we use the HK2-OSGi-ResourceLocator, that is called as part of the JAXB API implementation finding search order. |
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| # `org.gecko.playground.logging` | ||
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| This project is a multi bundle project in bndtools. This means on project can generate multiple bundles. This is a simple bridge to log various logging API's: | ||
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| * slf4j | ||
| * Java Util Logging | ||
| * log4j | ||
| * OSGi Log | ||
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| into one Log4j2 backend. | ||
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| The corresponding log4j2 configuration is located in *config/log4j2.xml* and you will find the resulting log file *gecko.log* in *cnf/logs/gecko.log* | ||
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| ``` | ||
| 2023.09.02 14:46:33,784 INFO [Start Level: Equinox Container: b11aaa01-5f0e-4d8b-89f7-f771e0ba2703] org.gecko.playground.logging.test.LoggingComponent: Activate with Log4J | ||
| 2023.09.02 14:46:33,785 INFO [Start Level: Equinox Container: b11aaa01-5f0e-4d8b-89f7-f771e0ba2703] org.gecko.playground.logging.test.LoggingComponent: Activate with SLF4J | ||
| 2023.09.02 14:46:33,785 INFO [Start Level: Equinox Container: b11aaa01-5f0e-4d8b-89f7-f771e0ba2703] org.gecko.playground.logging.test.LoggingComponent: Activate with OSGi Logging | ||
| ``` | ||
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| These log entries come out of *LoggingComponent*, that test logging with different log API's. |
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| # `org.gecko.playground.mongo` | ||
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| This project shows how to use a mongo-backed service to store and retrieve persons from an EMF model *org.gecko.playground.model*. | ||
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| The console *help* shows the commands: | ||
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| * `persistence:getPerson` | ||
| * `persistence:savePerson` | ||
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| Here is an example: | ||
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| ``` | ||
| g! savePerson Emil Tester | ||
| Sept. 02, 2023 12:31:33 PM com.mongodb.diagnostics.logging.JULLogger log | ||
| INFORMATION: Opened connection [connectionId{localValue:2, serverValue:13}] to mongodb:27017 | ||
| Saved Person in db with id 64f30f04f4bcc54824b1b8e5 | ||
| g! getPerson 64f30f04f4bcc54824b1b8e5 | ||
| Retrieved Person with id 64f30f04f4bcc54824b1b8e5 from db: Emil Tester | ||
| ``` | ||
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| This service is also used by the *playground.e4.rcp* example and the *playground.vaadin* applications as part of a more complex, re-usable part. | ||
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| # `org.gecko.playground.promise` | ||
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| This project shows how to use asynchronous programming with OSGi Promises. The example shows how to use a `Deferred`, to hook in external frameworks and use their callbacks to trigger resolving of promises. This is a more advanced example, than the usual promises stuff. | ||
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| When starting the programm, you will see: | ||
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| ``` | ||
| g! Scheduling database connection (main) | ||
| Finished activation (main) | ||
| ``` | ||
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| After 15 seconds the database is connected and sends the resolved state: | ||
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| ``` | ||
| Try connecting to database ... (pool-4-thread-1) | ||
| Database seems available: Doing sthg with the database ... | ||
| Database ID: CONID-b152b893-8961-4da7-8a80-11bf800a844a | ||
| ``` | ||
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| The `list` command shows you two components: | ||
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| ``` | ||
| g! list | ||
| org.gecko.playground.promise.DatabaseDriverComponent in bundle 3 (org.gecko.playground.promise:1.0.0.202309021036-SNAPSHOT) enabled, 1 instance. | ||
| Id: 1, State:ACTIVE | ||
| org.gecko.playground.promise.DatabaseAvailableChecker in bundle 3 (org.gecko.playground.promise:1.0.0.202309021036-SNAPSHOT) enabled, 1 instance. | ||
| Id: 0, State:ACTIVE | ||
| ``` | ||
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| If you e.g. stop the *DatabaseDriverComponent* with: | ||
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| ``` | ||
| g! disable org.gecko.playground.promise.DatabaseDriverComponent | ||
| ``` | ||
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| you will see, that the promise informs, that the database will be disconnected gracefully: | ||
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| ``` | ||
| Disconnected Database with ID: b152b893-8961-4da7-8a80-11bf800a844a | ||
| true | ||
| Database has gone! Stop working with database! | ||
| ``` | ||
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