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Language:
English
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Language:
English
17.11. Registering a LocalRuleExecutionSet with the RuleAdministrator API
Procedure 17.2. Task
- Create a RuleExecutionSet. You can do so by using the RuleAdministrator which provides factory methods to return an empty LocalRuleExecutionSetProvider or RuleExecutionSetProvider.
- Specify the name for the RuleExecutionSet.
- Register the RuleExecutionSet as shown below:
// Register the RuleExecutionSet with the RuleAdministrator String uri = ruleExecutionSet.getName(); ruleAdministrator.registerRuleExecutionSet(uri, ruleExecutionSet, null);
- Use the LocalRuleExecutionSetProvider to load a RuleExecutionSets from local sources that are not serializable, like Streams.
- Use the RuleExecutionSetProvider to load RuleExecutionSets from serializable sources, like DOM Elements or Packages. Both the "ruleAdministrator.getLocalRuleExecutionSetProvider( null );" and the "ruleAdministrator.getRuleExecutionSetProvider( null );" (use null as a parameter).
- The example below shoes you how to register the LocalRuleExecutionSet:
// Get the RuleAdministration RuleAdministrator ruleAdministrator = ruleServiceProvider.getRuleAdministrator(); LocalRuleExecutionSetProvider ruleExecutionSetProvider = ruleAdministrator.getLocalRuleExecutionSetProvider( null ); // Create a Reader for the drl URL drlUrl = new URL("http://mydomain.org/sources/myrules.drl"); Reader drlReader = new InputStreamReader( drlUrl.openStream() ); // Create the RuleExecutionSet for the drl RuleExecutionSet ruleExecutionSet = ruleExecutionSetProvider.createRuleExecutionSet( drlReader, null );
- You can use the "ruleExecutionSetProvider.createRuleExecutionSet( reader, null )" property to provide configuration for the incoming source. When null is passed the default is used to load the input as a drl. Allowed keys for a map are "source" and "dsl". The key "source" takes "drl" or "xml" as its value.
- Set "source" to "drl" to load a DRL, or to "xml" to load an XML source. "xml" will ignore any "dsl" key/value settings. The "dsl" key can take a Reader or a String (the contents of the dsl) as a value. See the following dsl example:
// Get the RuleAdministration RuleAdministration ruleAdministrator = ruleServiceProvider.getRuleAdministrator(); LocalRuleExecutionSetProvider ruleExecutionSetProvider = ruleAdministrator.getLocalRuleExecutionSetProvider( null ); // Create a Reader for the drl URL drlUrl = new URL("http://mydomain.org/sources/myrules.drl"); Reader drlReader = new InputStreamReader( drlUrl.openStream() ); // Create a Reader for the dsl and a put in the properties map URL dslUrl = new URL("http://mydomain.org/sources/myrules.dsl"); Reader dslReader = new InputStreamReader( dslUrl.openStream() ); Map properties = new HashMap(); properties.put( "source", "drl" ); properties.put( "dsl", dslReader ); // Create the RuleExecutionSet for the drl and dsl RuleExecutionSet ruleExecutionSet = ruleExecutionSetProvider.createRuleExecutionSet( reader, properties );