org.drools.conf.EventProcessingOption Maven / Gradle / Ivy
/**
* Copyright 2010 JBoss Inc
*
* Licensed 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.
*/
package org.drools.conf;
/**
* An Enum for Event Processing option.
*
* drools.eventProcessingMode = <identity|equality>
*
* When the rulebase is compiled in the CLOUD (default) event processing mode,
* it behaves just like a regular rulebase.
*
* When the rulebase is compiled in the STREAM event processing mode, additional
* assumptions are made. These assumptions allow the engine to perform a few optimisations
* like:
*
* reasoning over absence of events (NOT CE), automatically adds an appropriate duration attribute
* to the rule in order to avoid early rule firing.
* memory management techniques may be employed when an event no longer can match other events
* due to session clock continuous increment.
*
* @author etirelli
*
*/
public enum EventProcessingOption
implements SingleValueKnowledgeBaseOption {
CLOUD("cloud"),
STREAM("stream");
/**
* The property name for the sequential mode option
*/
public static final String PROPERTY_NAME = "drools.eventProcessingMode";
private String string;
EventProcessingOption(String mode) {
this.string = mode;
}
/**
* {@inheritDoc}
*/
public String getPropertyName() {
return PROPERTY_NAME;
}
public String getMode() {
return string;
}
public String toString() {
return "EventProcessingOption( "+string+ " )";
}
public String toExternalForm() {
return this.string;
}
public static EventProcessingOption determineEventProcessingMode(String mode) {
if ( STREAM.getMode().equalsIgnoreCase( mode ) ) {
return STREAM;
} else if ( CLOUD.getMode().equalsIgnoreCase( mode ) ) {
return CLOUD;
}
throw new IllegalArgumentException( "Illegal enum value '" + mode + "' for EventProcessingMode" );
}
}