/*
* Copyright 2010 Red Hat, Inc. and/or its affiliates.
*
* 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.kie.api.runtime.conf;
/**
* An enum to configure the session query listener configuration.
*
* Query results are collected by a listener class. The "STANDARD"
* query listener class copies and disconnects fact handles and objects
* for query results, making them somewhat resilient to some working
* memory actions. But this copying is costly. For the cases where
* no concurrency exists between query execution and other working memory
* actions, a lightweight listener implementation can be used, preventing
* the copy and improving query performance significantly.
*/
public enum QueryListenerOption implements SingleValueKieSessionOption {
STANDARD("standard"),
LIGHTWEIGHT("lightweight");
/**
* The property name for the clock type configuration
*/
public static final String PROPERTY_NAME = "drools.queryListener";
private String option;
QueryListenerOption(String option) {
this.option = option;
}
/**
* {@inheritDoc}
*/
public String getPropertyName() {
return PROPERTY_NAME;
}
public String getAsString() {
return option;
}
public String toString() {
return "QueryListenerClassOption( " + option + " )";
}
public static QueryListenerOption determineQueryListenerClassOption(String option) {
if ( STANDARD.getAsString().equalsIgnoreCase( option ) ) {
return STANDARD;
} else if ( LIGHTWEIGHT.getAsString().equalsIgnoreCase( option ) ) {
return LIGHTWEIGHT;
}
throw new IllegalArgumentException( "Illegal enum value '" + option + "' for QueryListenerOption" );
}
}