| == Camel Persistent Aggregate |
| |
| === Introduction |
| |
| This example shows how to use Camel Aggregator EIP which offers (since |
| Camel 2.3) database persistence. |
| |
| It's an interactive example where you can type in some numbers which |
| then are aggregated (summed, per this sample's aggregation strategy) |
| whenever the user types `STOP`. |
| The user can then enter more numbers to do another aggregation. |
| |
| ==== How it works |
| |
| The example is an interactive example where it prompts on the console for |
| you to enter a number and press `ENTER`. The numbers you enter will |
| then be aggregated and persisted. That means you can at any time hit |
| `ctrl + c` to shut down Camel. |
| |
| Then you should be able to start the example again and resume where you |
| left. When you want to complete the aggregation you can enter `STOP` |
| as input and Camel will show you the result, which is the sum of all the |
| numbers entered. |
| |
| The persistent datastore is located in the `data/hawtdb.dat` file. Its |
| automatically created the first time. |
| |
| ==== Camel component used in this example |
| |
| * camel-core |
| * camel-spring |
| * camel-stream |
| |
| === Build |
| |
| The example is run using Maven. |
| |
| First compile the example by entering: |
| |
| [source,sh] |
| ---- |
| $ mvn compile |
| ---- |
| |
| === Run |
| |
| To run the example type: |
| |
| [source,sh] |
| ---- |
| $ mvn camel:run |
| ---- |
| |
| To stop the example hit `ctrl + c`. If you restart it and resume entering |
| numbers you should see that it remembered previously entered values, as |
| it uses a persistent store. |
| |
| === Help and contributions |
| |
| If you hit any problem using Camel or have some feedback, then please |
| https://camel.apache.org/support.html[let us know]. |
| |
| We also love contributors, so |
| https://camel.apache.org/contributing.html[get involved] :-) |
| |
| The Camel riders! |