/*
* 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.jsr94.rules;
/*
* $Id: ExampleRuleEngineFacade.java,v 1.5 2004/11/17 03:09:50 dbarnett Exp $
*
* Copyright 2002-2004 (C) The Werken Company. All Rights Reserved.
*
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided that the
* following conditions are met:
*
* 1. Redistributions of source code must retain copyright statements and
* notices. Redistributions must also contain a copy of this document.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The name "drools" must not be used to endorse or promote products derived
* from this Software without prior written permission of The Werken Company.
* For written permission, please contact bob@werken.com.
*
* 4. Products derived from this Software may not be called "drools" nor may
* "drools" appear in their names without prior written permission of The Werken
* Company. "drools" is a registered trademark of The Werken Company.
*
* 5. Due credit should be given to The Werken Company.
* (http://drools.werken.com/).
*
* THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE WERKEN COMPANY OR ITS CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import javax.rules.RuleRuntime;
import javax.rules.RuleServiceProvider;
import javax.rules.RuleServiceProviderManager;
import javax.rules.StatefulRuleSession;
import javax.rules.StatelessRuleSession;
import javax.rules.admin.LocalRuleExecutionSetProvider;
import javax.rules.admin.RuleAdministrator;
import javax.rules.admin.RuleExecutionSet;
/**
* Builds up the JSR94 object structure. It'll simplify the task of building a
* <code>RuleExecutionSet</code> and associated <code>RuntimeSession</code>
* objects from a given <code>InputStream</code>.
*/
public class ExampleRuleEngineFacade {
public static final String RULE_SERVICE_PROVIDER = "http://drools.org/";
private RuleAdministrator ruleAdministrator;
private RuleServiceProvider ruleServiceProvider;
private LocalRuleExecutionSetProvider ruleSetProvider;
private RuleRuntime ruleRuntime;
// configuration parameters
String ruleFilesDirectory;
String ruleFilesIncludes;
public ExampleRuleEngineFacade() throws Exception {
RuleServiceProviderManager.registerRuleServiceProvider( ExampleRuleEngineFacade.RULE_SERVICE_PROVIDER,
RuleServiceProviderImpl.class );
this.ruleServiceProvider = RuleServiceProviderManager.getRuleServiceProvider( ExampleRuleEngineFacade.RULE_SERVICE_PROVIDER );
this.ruleAdministrator = this.ruleServiceProvider.getRuleAdministrator();
this.ruleSetProvider = this.ruleAdministrator.getLocalRuleExecutionSetProvider( null );
}
public void addRuleExecutionSet(final String bindUri,
final InputStream resourceAsStream) throws Exception {
final Reader ruleReader = new InputStreamReader( resourceAsStream );
final RuleExecutionSet ruleExecutionSet = this.ruleSetProvider.createRuleExecutionSet( ruleReader,
null );
this.ruleAdministrator.registerRuleExecutionSet( bindUri,
ruleExecutionSet,
null );
}
public void addRuleExecutionSet(final String bindUri,
final InputStream resourceAsStream,
final java.util.Map properties) throws Exception {
final Reader ruleReader = new InputStreamReader( resourceAsStream );
final RuleExecutionSet ruleExecutionSet = this.ruleSetProvider.createRuleExecutionSet( ruleReader,
properties );
this.ruleAdministrator.registerRuleExecutionSet( bindUri,
ruleExecutionSet,
properties );
}
/**
* Returns a named <code>StatelessRuleSession</code>.
*
*
* @return StatelessRuleSession
* @throws Exception
*/
public StatelessRuleSession getStatelessRuleSession(final String key,
final java.util.Map properties) throws Exception {
this.ruleRuntime = this.ruleServiceProvider.getRuleRuntime();
return (StatelessRuleSession) this.ruleRuntime.createRuleSession( key,
properties,
RuleRuntime.STATELESS_SESSION_TYPE );
}
/**
* Returns a named <code>StatelessRuleSession</code>.
*
* @param key
* @return StatelessRuleSession
* @throws Exception
*/
public StatelessRuleSession getStatelessRuleSession(final String key) throws Exception {
return this.getStatelessRuleSession( key,
null );
}
public StatefulRuleSession getStatefulRuleSession(final String key) throws Exception {
return this.getStatefulRuleSession( key,
null );
}
public StatefulRuleSession getStatefulRuleSession(final String key,
final java.util.Map properties) throws Exception {
this.ruleRuntime = this.ruleServiceProvider.getRuleRuntime();
return (StatefulRuleSession) this.ruleRuntime.createRuleSession( key,
properties,
RuleRuntime.STATEFUL_SESSION_TYPE );
}
public RuleServiceProvider getRuleServiceProvider() {
return this.ruleServiceProvider;
}
}