Java tutorial
/* * GLIMPSE: A generic and flexible monitoring infrastructure. * For further information: http://labsewiki.isti.cnr.it/labse/tools/glimpse/public/main * * Copyright (C) 2011 Software Engineering Laboratory - ISTI CNR - Pisa - Italy * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * */ package it.cnr.isti.labsedc.glimpse.rules; import java.util.Collection; import org.apache.commons.net.ntp.TimeStamp; import org.drools.KnowledgeBase; import org.drools.RuntimeDroolsException; import org.drools.builder.KnowledgeBuilder; import org.drools.builder.KnowledgeBuilderFactory; import org.drools.builder.ResourceType; import org.drools.definition.KnowledgePackage; import org.drools.definition.rule.Rule; import org.drools.io.ResourceFactory; import org.w3c.dom.DOMException; import it.cnr.isti.labse.glimpse.xml.complexEventRule.ComplexEventRuleActionType; import it.cnr.isti.labse.glimpse.xml.complexEventRule.ComplexEventRuleType; import it.cnr.isti.labsedc.glimpse.exceptions.IncorrectRuleFormatException; import it.cnr.isti.labsedc.glimpse.exceptions.UnknownMethodCallRuleException; import it.cnr.isti.labsedc.glimpse.exceptions.UnknownRuleException; import it.cnr.isti.labsedc.glimpse.rules.RulesManager; import it.cnr.isti.labsedc.glimpse.utils.DebugMessages; public class DroolsRulesManager extends RulesManager { static KnowledgeBuilder kbuilder; static KnowledgeBase kbase; public DroolsRulesManager(Object knowledgeBuilder, Object knowledgeBase, Object knowledgeSession) { super(knowledgeBuilder, knowledgeBase, knowledgeSession); kbuilder = (KnowledgeBuilder) knowledgeBuilder; kbase = (KnowledgeBase) knowledgeBase; kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); } @Override public void insertRule(final String rule, final String ruleName) throws IncorrectRuleFormatException, UnknownMethodCallRuleException { try { kbuilder.add(ResourceFactory.newByteArrayResource(rule.trim().getBytes()), ResourceType.DRL); } catch (RuntimeDroolsException droolsExceptionOnLoading) { throw new UnknownMethodCallRuleException(); } if (kbuilder.getErrors().size() > 0) throw new IncorrectRuleFormatException(); } @Override public void deleteRule(final String ruleName) throws UnknownRuleException { DebugMessages.println(TimeStamp.getCurrentTime(), this.getClass().getCanonicalName(), "Listing rules loaded into the knowledgeBases"); Collection<KnowledgePackage> ass = kbase.getKnowledgePackages(); Object esd[] = ass.toArray(); for (int i = 0; i < esd.length; i++) { KnowledgePackage kp = (KnowledgePackage) esd[i]; Collection<Rule> rls = kp.getRules(); Object r[] = rls.toArray(); DebugMessages.println(TimeStamp.getCurrentTime(), this.getClass().getCanonicalName(), "KnowledgeBase name: " + kp.getName()); if (r.length > 0) { for (int j = 0; j < r.length; j++) { Rule gg = (Rule) r[j]; if (gg.getName().compareTo(ruleName) == 0) { kp.getRules().remove(gg); } } } } /* * DebugMessages.println(TimeStamp.getCurrentTime(),this.getClass().getCanonicalName(), "Listing rules loaded into the knowledgeBases"); Collection<KnowledgePackage> ass = kbase.getKnowledgePackages(); Object esd[] = ass.toArray(); for (int i = 0; i<esd.length; i++) { KnowledgePackage kp = (KnowledgePackage)esd[i]; Collection<Rule> rls = kp.getRules(); Object r[] = rls.toArray(); DebugMessages.println(TimeStamp.getCurrentTime(),this.getClass().getCanonicalName(), "KnowledgeBase name: " + kp.getName()); if (r.length == 0) { DebugMessages.println(TimeStamp.getCurrentTime(),this.getClass().getCanonicalName(), "--! No rules loaded into: " + kp.getName() + " knowledgeBase"); } else { for (int j = 0; j<r.length;j++) { Rule gg = (Rule) r[j]; DebugMessages.println(TimeStamp.getCurrentTime(),this.getClass().getCanonicalName(), "RuleName: " + gg.getName()); } } DebugMessages.line(); */ } void startRule(final String ruleName) throws UnknownRuleException { } void stopRule(final String ruleName) throws UnknownRuleException { } void restartRule(final String ruleName) throws UnknownRuleException { } public Object[] loadRules(final ComplexEventRuleActionType rules) throws IncorrectRuleFormatException { final ComplexEventRuleType[] insertRules = rules.getInsertArray(); for (int i = 0; i < insertRules.length; i++) { try { insertRule(insertRules[i].getRuleBody(), insertRules[i].getRuleName()); } catch (final DOMException e) { e.printStackTrace(); } catch (UnknownMethodCallRuleException e) { e.printStackTrace(); } } final ComplexEventRuleType[] deleteRules = rules.getDeleteArray(); for (int i = 0; i < deleteRules.length; i++) { try { deleteRule(deleteRules[i].getRuleName()); } catch (final DOMException e) { e.printStackTrace(); } catch (final UnknownRuleException e) { e.printStackTrace(); } } final ComplexEventRuleType[] startRules = rules.getStartArray(); for (int i = 0; i < startRules.length; i++) { try { startRule(startRules[i].getRuleName()); } catch (final DOMException e) { e.printStackTrace(); } catch (final UnknownRuleException e) { e.printStackTrace(); } } final ComplexEventRuleType[] stopRules = rules.getStopArray(); for (int i = 0; i < stopRules.length; i++) { try { stopRule(stopRules[i].getRuleName()); } catch (final DOMException e) { e.printStackTrace(); } catch (final UnknownRuleException e) { e.printStackTrace(); } } final ComplexEventRuleType[] restartRules = rules.getRestartArray(); for (int i = 0; i < restartRules.length; i++) { try { restartRule(restartRules[i].getRuleName()); } catch (final DOMException e) { e.printStackTrace(); } catch (final UnknownRuleException e) { e.printStackTrace(); } } kbase.addKnowledgePackages(kbuilder.getKnowledgePackages()); DroolsRulesManager.getLoadedRulesInfo(); return kbase.getKnowledgePackages().toArray(); } public int getLoadedKnowledgePackageCardinality() { return kbase.getKnowledgePackages().size(); } public static void getLoadedRulesInfo() { DebugMessages.println(TimeStamp.getCurrentTime(), DroolsRulesManager.class.getCanonicalName(), "Listing rules loaded into the knowledgeBases"); Collection<KnowledgePackage> ass = kbase.getKnowledgePackages(); Object esd[] = ass.toArray(); for (int i = 0; i < esd.length; i++) { KnowledgePackage kp = (KnowledgePackage) esd[i]; Collection<Rule> rls = kp.getRules(); Object r[] = rls.toArray(); DebugMessages.println(TimeStamp.getCurrentTime(), DroolsRulesManager.class.getCanonicalName(), "KnowledgeBase name: " + kp.getName()); if (r.length == 0) { DebugMessages.println(TimeStamp.getCurrentTime(), DroolsRulesManager.class.getCanonicalName(), "--! No rules loaded into: " + kp.getName() + " knowledgeBase"); } else { for (int j = 0; j < r.length; j++) { Rule gg = (Rule) r[j]; DebugMessages.println(TimeStamp.getCurrentTime(), DroolsRulesManager.class.getCanonicalName(), "RuleName: " + gg.getName()); } } } } public static void unloadRule(String ruleName) { Collection<KnowledgePackage> ass = kbase.getKnowledgePackages(); Object esd[] = ass.toArray(); for (int i = 0; i < esd.length; i++) { KnowledgePackage kp = (KnowledgePackage) esd[i]; Collection<Rule> rls = kp.getRules(); Object r[] = rls.toArray(); DebugMessages.println(TimeStamp.getCurrentTime(), DroolsRulesManager.class.getCanonicalName(), "KnowledgeBase name: " + kp.getName()); if (r.length > 0) { for (int j = 0; j < r.length; j++) { Rule gg = (Rule) r[j]; if (gg.getName().compareTo(ruleName) == 0) { kbase.removeRule(kp.getName(), gg.getName()); } } } } DroolsRulesManager.getLoadedRulesInfo(); } }