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| |
| CAMEL OSGI NMR EXAMPLE |
| ====================== |
| |
| Purpose |
| ------- |
| Deploys two Camel EIP routes that communicate with each other |
| via the ServiceMix NMR. |
| |
| |
| Explanation |
| ----------- |
| The NMR is a general-purpose message bus that applications can |
| use to communicate within the ServiceMix OSGi container. It is |
| modeled on the Normalized Message Router (NMR) defined in the |
| Java Business Integration (JBI) specification. |
| |
| The Camel routes are defined in the beans.xml file that is located |
| in the src/main/resources/META-INF/spring directory of this example. |
| The contents of the beans.xml file can be explained as follows: |
| |
| 1. Imports the camel-nmr.xml file, which instantiates and |
| initializes the NMR component. |
| |
| 2. Defines a route that generates a heartbeat message every |
| 2000ms and sends it to the NMR. |
| |
| 3. Defines a second route that receives the message from the NMR, |
| transforms the heartbeat into a message containing the current |
| date and time, and logs the message. |
| |
| The routes are deployed in an OSGi bundle. |
| |
| |
| Prerequisites for Building and Running the Example |
| -------------------------------------------------- |
| 1. You must have the following installed on your machine: |
| |
| - JDK 1.5 or higher |
| |
| - Maven 2.2.1 or higher (for building) |
| |
| For more information, see the README in the top-level examples |
| directory. |
| |
| |
| 2. Start ServiceMix by running the following command: |
| |
| <servicemix_home>/bin/servicemix (on UNIX) |
| <servicemix_home>\bin\servicemix (on Windows) |
| |
| |
| Running the Example |
| ------------------- |
| You can run the example in two ways: |
| |
| - A. Using a Prebuilt Deployment Bundle: Quick and Easy |
| This option is useful if you want to see the example up and |
| running quickly. |
| |
| - B. Building the Example Bundle Yourself |
| This option is useful if you want to change the example in any |
| way. It tells you how to build and deploy the example. This |
| option might be slower than option A because if you do not |
| already have the required bundles in your local Maven |
| repository, Maven will have to download the bundles it needs. |
| |
| A. Using a Prebuilt Deployment Bundle:Quick and Easy |
| ---------------------------------------------------- |
| To install and run a prebuilt version of this example, enter |
| the following command in the ServiceMix console: |
| |
| features:install examples-camel-nmr |
| |
| This command makes use of the ServiceMix features facility. For |
| more information about the features facility, see the README.txt |
| file in the examples parent directory. |
| |
| Once the example is running you should see output similar to |
| the following being logged to the console screen: |
| |
| >>>> MyTransform set body: Wed Aug 05 11:52:40 BST 2009 |
| >>>> MyTransform set body: Wed Aug 05 11:52:42 BST 2009 |
| >>>> MyTransform set body: Wed Aug 05 11:52:44 BST 2009 |
| |
| For information on how to stop and/or uninstall the example, |
| see "Stopping and Uninstalling the Example" below. |
| |
| B. Building the Example Bundle Yourself |
| --------------------------------------- |
| To install and run the example where you build the example |
| bundle yourself, complete the following steps: |
| |
| 1. If you have already run the example using the prebuilt |
| version as described above, you must first uninstall the |
| examples-camel-nmr feature by entering the following command |
| in the ServiceMix console: |
| |
| features:uninstall examples-camel-nmr |
| |
| 2. Build the example by opening a command prompt, changing |
| directory to examples/camel-nmr (this example) and entering |
| the following Maven command: |
| |
| mvn install |
| |
| If all of the required OSGi bundles are available in your |
| local Maven repository, the example will build quickly. |
| Otherwise it may take some time for Maven to download |
| everything it needs. |
| |
| The mvn install command builds the example deployment bundle and |
| copies it to your local Maven repository and to the target |
| directory of this example. |
| |
| 3. Install the example by entering the following command in |
| the ServiceMix console: |
| |
| features:install examples-camel-nmr |
| |
| This command makes use of the ServiceMix features facility. For |
| more information about the features facility, see the README.txt |
| file in the examples parent directory. |
| |
| Once the example is running you should see output similar to the |
| following being logged to the console screen: |
| |
| >>>> MyTransform set body: Wed Aug 05 11:52:40 BST 2009 |
| >>>> MyTransform set body: Wed Aug 05 11:52:42 BST 2009 |
| >>>> MyTransform set body: Wed Aug 05 11:52:44 BST 2009 |
| |
| |
| Stopping and Uninstalling the Example |
| ------------------------------------- |
| To stop the example, first you must know the bundle ID that ServiceMix |
| has assigned to it. To get the bundle ID, enter the following command |
| in the ServiceMix console (Note, the text you are typing will |
| intermingle with the output being logged. This is nothing to worry |
| about.): |
| |
| osgi:list |
| |
| At the end of the listing, you should see an entry similar to the |
| following: |
| |
| [160] [Active ] [Started] [ 60] Apache ServiceMix Example :: Camel NMR (4.1.0.0) |
| |
| In this case, the bundle ID is 160. |
| |
| To stop the example, enter the following command in the ServiceMix |
| console: |
| |
| osgi:stop <bundle_id> |
| |
| For example: |
| |
| osgi:stop 160 |
| |
| To uninstall the example, enter one of the following commands |
| in the ServiceMix console: |
| |
| features:uninstall examples-camel-nmr |
| |
| or |
| |
| osgi:uninstall <bundle_id> |
| |
| |
| Viewing the Log Entries |
| ----------------------- |
| You can view the entries in the log file in the data/log |
| directory of your ServiceMix installation, or by typing the |
| following command in the ServiceMix console: |
| |
| log:display |