/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ CAMEL DROOLS EXAMPLE ==================== Purpose ------- Deploys a Camel route which allows a Drools rules file to evaluate messages and deliver each of them to a appropriate destination. Explanation ----------- The Camel route is defined in a Spring XML file, camel-context.xml, which can be found in the src/main/resources/META-INF/spring directory of this example. The route is defined in the element and can be explained as follows: 1. A timer endpoint generates a person every second 2. A the Person object is send to a Drools grid-node which is connected to the Drools knowledge base 3. After the object is evaluated, It's Vip-property is inspected 4. Based on this value, one of the two log-messages is chosen to display the result. The camel-context.xml file also contains the following elements: - A element as a reference to the Drools ruleset. - A element for the configuration of the knowledge base and the link to the DRL-rules file - A element which creates a session for the Drools evaluation - A personHelper bean to generate random Person objects - the Drools camel component bean for our camel route. - An illustrative definition of a route which shows an example of passing (inserting) the Body of the message as a POJO to Drools for execution. - An illustrative definition of a route which shows an example of creating a Drools Command wrapping the Body of the message with the help of the custom DroolsCommandHelperBean (included in this project), and passing this Drools Command to the ruleset for execution. The route and configuration are deployed in an OSGi bundle. Embedded rules --------------- rule "humans need water" Every person gets water rule "boys go for Cola Zero" Males older than 8 get Cola Zero rule "girls go for Cola Light" Girls older than 8 get Cola Light rule "can you drink?" A person older than 21 can drink alcohol rule "woman go for wine" Woman who are allowed to drink, take wine rule "men go for beer" Men who are allowed to drink, take beer rule "Vip in the house!" Rich people are VIPs rule "Vip woman drink bubbles" Female VIPs drink champagne rule "Vip men drink scotch" Male VIPs drink scotch Prerequisites for Running the Example ------------------------------------- 1. You must have the following installed on your machine: - JDK 1.6 or higher - Maven 2.2.1 or higher (for building) For more information, see the README in the top-level examples directory. 2. This example requires some additional configuration to allow the JVM to use more PermGen memory: export JAVA_MAX_PERM_MEM=128m (on UNIX) set JAVA_MAX_PERM_MEM=128m (on Windows) 3. Start ServiceMix by running the following command: /bin/servicemix (on UNIX) \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-drools 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, periodic events trigger the generation of a Person object and his evaluation. An object can either end up in the VIP log message or in a regular log message >>>> | ServeDrink | ... | Serve this old man a pint of beer >>>> | ServeDrink VIP | ... | This old rich woman is a VIP! Give a bottle of champagne from the house 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-drools feature by entering the following command in the ServiceMix console: features:uninstall examples-camel-drools 2. Build the example by opening a command prompt, changing directory to examples/camel/camel-drools (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 very 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-drools It 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, periodic events trigger the generation of a Person object and his evaluation. An object can either end up in the VIP log message or in a regular log message >>>> | ServeDrink | ... | Serve this old man a pint of beer >>>> | ServeDrink VIP | ... | This old rich woman is a VIP! Give a bottle of champagne from the house Stopping and Uninstalling the Example ------------------------------------- To stop the example, enter the following command in the ServiceMix console: osgi:stop For information on how to find the bundle_id assigned to the example, see step 3 in the "Updating and Redeploying the Properties File from the Console" section above. To uninstall the example, enter one of the following commands in the ServiceMix console: features:uninstall examples-camel-drools or osgi:uninstall 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