+ private static final String FACT_RETRIEVE_ERROR = "Object cannot be retrieved from fact {}";
+
+ /**
+ * logger.
+ */
+ private static Logger logger = LoggerFactory.getLogger(MavenDroolsController.class);
+
+ /**
+ * Policy Container, the access object to the policy-core layer.
+ */
+ @GsonJsonIgnore
+ protected final PolicyContainer policyContainer;
+
+ /**
+ * alive status of this drools controller,
+ * reflects invocation of start()/stop() only.
+ */
+ protected volatile boolean alive = false;
+
+ /**
+ * locked status of this drools controller,
+ * reflects if i/o drools related operations are permitted,
+ * more specifically: offer() and deliver().
+ * It does not affect the ability to start and stop
+ * underlying drools infrastructure
+ */
+ protected volatile boolean locked = false;
+
+ /**
+ * list of topics, each with associated decoder classes, each
+ * with a list of associated filters.
+ */
+ protected List<TopicCoderFilterConfiguration> decoderConfigurations;
+
+ /**
+ * list of topics, each with associated encoder classes, each
+ * with a list of associated filters.
+ */
+ protected List<TopicCoderFilterConfiguration> encoderConfigurations;
+
+ /**
+ * recent source events processed.
+ */
+ protected final CircularFifoQueue<Object> recentSourceEvents = new CircularFifoQueue<>(10);
+
+ /**
+ * recent sink events processed.
+ */
+ protected final CircularFifoQueue<String> recentSinkEvents = new CircularFifoQueue<>(10);
+
+ /**
+ * original Drools Model/Rules classloader hash.
+ */
+ protected int modelClassLoaderHash;
+
+ /**
+ * Expanded version of the constructor.
+ *
+ * @param groupId maven group id
+ * @param artifactId maven artifact id
+ * @param version maven version
+ * @param decoderConfigurations list of topic -> decoders -> filters mapping
+ * @param encoderConfigurations list of topic -> encoders -> filters mapping
+ *
+ * @throws IllegalArgumentException invalid arguments passed in
+ */
+ public MavenDroolsController(String groupId,
+ String artifactId,
+ String version,
+ List<TopicCoderFilterConfiguration> decoderConfigurations,
+ List<TopicCoderFilterConfiguration> encoderConfigurations) {
+
+ logger.info("drools-controller instantiation [{}:{}:{}]", groupId, artifactId, version);
+
+ if (groupId == null || groupId.isEmpty()) {
+ throw new IllegalArgumentException("Missing maven group-id coordinate");
+ }
+
+ if (artifactId == null || artifactId.isEmpty()) {
+ throw new IllegalArgumentException("Missing maven artifact-id coordinate");
+ }
+
+ if (version == null || version.isEmpty()) {
+ throw new IllegalArgumentException("Missing maven version coordinate");
+ }
+
+ this.policyContainer = makePolicyContainer(groupId, artifactId, version);
+ this.init(decoderConfigurations, encoderConfigurations);
+
+ logger.debug("{}: instantiation completed ", this);
+ }
+
+ /**
+ * init encoding/decoding configuration.
+ *
+ * @param decoderConfigurations list of topic -> decoders -> filters mapping
+ * @param encoderConfigurations list of topic -> encoders -> filters mapping
+ */
+ protected void init(List<TopicCoderFilterConfiguration> decoderConfigurations,
+ List<TopicCoderFilterConfiguration> encoderConfigurations) {
+
+ this.decoderConfigurations = decoderConfigurations;
+ this.encoderConfigurations = encoderConfigurations;
+
+ this.initCoders(decoderConfigurations, true);
+ this.initCoders(encoderConfigurations, false);
+
+ this.modelClassLoaderHash = this.policyContainer.getClassLoader().hashCode();
+ }
+
+ @Override
+ public void updateToVersion(String newGroupId, String newArtifactId, String newVersion,
+ List<TopicCoderFilterConfiguration> decoderConfigurations,
+ List<TopicCoderFilterConfiguration> encoderConfigurations)
+ throws LinkageError {
+
+ logger.info("updating version -> [{}:{}:{}]", newGroupId, newArtifactId, newVersion);
+
+ validateText(newGroupId, "Missing maven group-id coordinate");
+ validateText(newArtifactId, "Missing maven artifact-id coordinate");
+ validateText(newVersion, "Missing maven version coordinate");
+
+ validateHasBrain(newGroupId, newArtifactId, newVersion);
+
+ if (newGroupId.equalsIgnoreCase(this.getGroupId())
+ && newArtifactId.equalsIgnoreCase(this.getArtifactId())
+ && newVersion.equalsIgnoreCase(this.getVersion())) {
+ logger.warn("All in the right version: {}:{}:{} vs. {}", newGroupId, newArtifactId, newVersion, this);
+ return;
+ }
+
+ validateNewVersion(newGroupId, newArtifactId, newVersion);
+
+ /* upgrade */
+ String messages = this.policyContainer.updateToVersion(newVersion);
+ logger.warn("{} UPGRADE results: {}", this, messages);
+
+ /*
+ * If all sucessful (can load new container), now we can remove all coders from previous sessions
+ */
+ this.removeCoders();
+
+ /*
+ * add the new coders
+ */
+ this.init(decoderConfigurations, encoderConfigurations);
+
+ logger.info("UPDATE-TO-VERSION: completed {}", this);
+ }
+
+ private void validateText(String text, String errorMessage) {
+ if (text == null || text.isEmpty()) {
+ throw new IllegalArgumentException(errorMessage);
+ }
+ }
+
+ private void validateHasBrain(String newGroupId, String newArtifactId, String newVersion) {
+ if (newGroupId.equalsIgnoreCase(DroolsControllerConstants.NO_GROUP_ID)
+ || newArtifactId.equalsIgnoreCase(DroolsControllerConstants.NO_ARTIFACT_ID)
+ || newVersion.equalsIgnoreCase(DroolsControllerConstants.NO_VERSION)) {
+ throw new IllegalArgumentException("BRAINLESS maven coordinates provided: "
+ + newGroupId + ":" + newArtifactId + ":"
+ + newVersion);
+ }
+ }
+
+ private void validateNewVersion(String newGroupId, String newArtifactId, String newVersion) {
+ if (!newGroupId.equalsIgnoreCase(this.getGroupId())
+ || !newArtifactId.equalsIgnoreCase(this.getArtifactId())) {
+ throw new IllegalArgumentException(
+ "Group ID and Artifact ID maven coordinates must be identical for the upgrade: "
+ + newGroupId + ":" + newArtifactId + ":"
+ + newVersion + " vs. " + this);
+ }
+ }
+
+ /**
+ * initialize decoders for all the topics supported by this controller
+ * Note this is critical to be done after the Policy Container is
+ * instantiated to be able to fetch the corresponding classes.
+ *
+ * @param coderConfigurations list of topic -> decoders -> filters mapping
+ */
+ protected void initCoders(List<TopicCoderFilterConfiguration> coderConfigurations,
+ boolean decoder) {
+
+ logger.info("INIT-CODERS: {}", this);
+
+ if (coderConfigurations == null) {
+ return;
+ }
+
+
+ for (TopicCoderFilterConfiguration coderConfig: coderConfigurations) {
+ String topic = coderConfig.getTopic();
+
+ CustomGsonCoder customGsonCoder = getCustomCoder(coderConfig);
+
+ List<PotentialCoderFilter> coderFilters = coderConfig.getCoderFilters();
+ if (coderFilters == null || coderFilters.isEmpty()) {
+ continue;
+ }
+
+ for (PotentialCoderFilter coderFilter : coderFilters) {
+ String potentialCodedClass = coderFilter.getCodedClass();
+ JsonProtocolFilter protocolFilter = coderFilter.getFilter();
+
+ if (!isClass(potentialCodedClass)) {
+ throw makeRetrieveEx(potentialCodedClass);
+ } else {
+ logClassFetched(potentialCodedClass);
+ }
+
+ if (decoder) {
+ getCoderManager().addDecoder(EventProtocolParams.builder()
+ .groupId(this.getGroupId())
+ .artifactId(this.getArtifactId())
+ .topic(topic)
+ .eventClass(potentialCodedClass)
+ .protocolFilter(protocolFilter)
+ .customGsonCoder(customGsonCoder)
+ .modelClassLoaderHash(this.policyContainer.getClassLoader().hashCode()));
+ } else {
+ getCoderManager().addEncoder(
+ EventProtocolParams.builder().groupId(this.getGroupId())
+ .artifactId(this.getArtifactId()).topic(topic)
+ .eventClass(potentialCodedClass).protocolFilter(protocolFilter)
+ .customGsonCoder(customGsonCoder)
+ .modelClassLoaderHash(this.policyContainer.getClassLoader().hashCode()));
+ }
+ }
+ }
+ }
+
+ private CustomGsonCoder getCustomCoder(TopicCoderFilterConfiguration coderConfig) {
+ CustomGsonCoder customGsonCoder = coderConfig.getCustomGsonCoder();
+ if (customGsonCoder != null
+ && customGsonCoder.getClassContainer() != null
+ && !customGsonCoder.getClassContainer().isEmpty()) {
+
+ String customGsonCoderClass = customGsonCoder.getClassContainer();
+ if (!isClass(customGsonCoderClass)) {
+ throw makeRetrieveEx(customGsonCoderClass);
+ } else {
+ logClassFetched(customGsonCoderClass);
+ }
+ }
+ return customGsonCoder;
+ }
+
+ /**
+ * Logs an error and makes an exception for an item that cannot be retrieved.
+ * @param itemName the item to retrieve
+ * @return a new exception
+ */
+ private IllegalArgumentException makeRetrieveEx(String itemName) {
+ logger.error("{} cannot be retrieved", itemName);
+ return new IllegalArgumentException(itemName + " cannot be retrieved");
+ }
+
+ /**
+ * Logs the name of the class that was fetched.
+ * @param className class name fetched
+ */
+ private void logClassFetched(String className) {
+ logger.info("CLASS FETCHED {}", className);
+ }
+
+
+ /**
+ * remove decoders.
+ */
+ protected void removeDecoders() {
+ logger.info("REMOVE-DECODERS: {}", this);
+
+ if (this.decoderConfigurations == null) {
+ return;
+ }
+
+
+ for (TopicCoderFilterConfiguration coderConfig: decoderConfigurations) {
+ String topic = coderConfig.getTopic();
+ getCoderManager().removeDecoders(this.getGroupId(), this.getArtifactId(), topic);
+ }
+ }
+
+ /**
+ * remove decoders.
+ */
+ protected void removeEncoders() {
+
+ logger.info("REMOVE-ENCODERS: {}", this);
+
+ if (this.encoderConfigurations == null) {
+ return;
+ }
+
+ for (TopicCoderFilterConfiguration coderConfig: encoderConfigurations) {
+ String topic = coderConfig.getTopic();
+ getCoderManager().removeEncoders(this.getGroupId(), this.getArtifactId(), topic);
+ }
+ }
+
+
+ @Override
+ public boolean ownsCoder(Class<?> coderClass, int modelHash) {
+ if (!isClass(coderClass.getName())) {
+ logger.error("{}{} cannot be retrieved. ", this, coderClass.getName());
+ return false;
+ }
+
+ if (modelHash == this.modelClassLoaderHash) {
+ logger.info("{}{} class loader matches original drools controller rules classloader {}",
+ coderClass.getName(), this, coderClass.getClassLoader());
+ return true;
+ } else {
+ logger.warn("{}{} class loaders don't match {} vs {}", this, coderClass.getName(),
+ coderClass.getClassLoader(), this.policyContainer.getClassLoader());
+ return false;
+ }
+ }
+
+ @Override
+ public boolean start() {
+
+ logger.info("START: {}", this);
+
+ synchronized (this) {
+ if (this.alive) {
+ return true;
+ }
+ this.alive = true;
+ }
+
+ return this.policyContainer.start();
+ }
+
+ @Override
+ public boolean stop() {
+
+ logger.info("STOP: {}", this);
+
+ synchronized (this) {
+ if (!this.alive) {
+ return true;
+ }
+ this.alive = false;
+ }
+
+ return this.policyContainer.stop();
+ }
+
+ @Override
+ public void shutdown() {
+ logger.info("{}: SHUTDOWN", this);
+
+ try {
+ this.stop();
+ this.removeCoders();
+ } catch (Exception e) {
+ logger.error("{} SHUTDOWN FAILED because of {}", this, e.getMessage(), e);
+ } finally {
+ this.policyContainer.shutdown();
+ }
+
+ }
+
+ @Override
+ public void halt() {
+ logger.info("{}: HALT", this);
+
+ try {
+ this.stop();
+ this.removeCoders();
+ } catch (Exception e) {
+ logger.error("{} HALT FAILED because of {}", this, e.getMessage(), e);
+ } finally {
+ this.policyContainer.destroy();
+ }
+ }
+
+ /**
+ * removes this drools controllers and encoders and decoders from operation.
+ */
+ protected void removeCoders() {
+ logger.info("{}: REMOVE-CODERS", this);
+
+ try {
+ this.removeDecoders();
+ } catch (IllegalArgumentException e) {
+ logger.error("{} REMOVE-DECODERS FAILED because of {}", this, e.getMessage(), e);
+ }
+
+ try {
+ this.removeEncoders();
+ } catch (IllegalArgumentException e) {
+ logger.error("{} REMOVE-ENCODERS FAILED because of {}", this, e.getMessage(), e);
+ }
+ }
+
+ @Override
+ public boolean isAlive() {
+ return this.alive;
+ }
+
+ @Override
+ public boolean offer(String topic, String event) {
+ logger.debug("{}: OFFER raw event from {}", this, topic);
+
+ if (this.locked || !this.alive || this.policyContainer.getPolicySessions().isEmpty()) {
+ return true;
+ }
+
+ // 1. Now, check if this topic has a decoder:
+
+ if (!getCoderManager().isDecodingSupported(this.getGroupId(),
+ this.getArtifactId(),
+ topic)) {
+
+ logger.warn("{}: DECODING-UNSUPPORTED {}:{}:{}", this, // NOSONAR
+ topic, this.getGroupId(), this.getArtifactId());
+ return true;
+ }
+
+ // 2. Decode
+
+ Object anEvent;
+ try {
+ anEvent = getCoderManager().decode(this.getGroupId(),
+ this.getArtifactId(),
+ topic,
+ event);
+ } catch (UnsupportedOperationException uoe) {
+ logger.debug("{}: DECODE FAILED: {} <- {} because of {}", this, topic,
+ event, uoe.getMessage(), uoe);
+ return true;
+ } catch (Exception e) {
+ logger.warn("{}: DECODE FAILED: {} <- {} because of {}", this, topic,
+ event, e.getMessage(), e);
+ return true;
+ }
+
+ return offer(anEvent);
+
+ }
+
+ /*
+ * This method always returns "true", which causes a sonar complaint. However,
+ * refactoring or restructuring it would unnecessarily complicate it, thus we'll just
+ * disable the sonar complaint.
+ */
+ @Override
+ public <T> boolean offer(T event) { // NOSONAR
+ logger.debug("{}: OFFER event", this);
+
+ if (this.locked || !this.alive || this.policyContainer.getPolicySessions().isEmpty()) {
+ return true;
+ }
+
+ synchronized (this.recentSourceEvents) {
+ this.recentSourceEvents.add(event);
+ }
+
+ PdpJmx.getInstance().updateOccured();
+
+ // Broadcast
+
+ if (FeatureApiUtils.apply(getDroolsProviders().getList(),
+ feature -> feature.beforeInsert(this, event),
+ (feature, ex) -> logger.error("{}: feature {} before-insert failure because of {}", this,
+ feature.getClass().getName(), ex.getMessage(), ex))) {
+ return true;
+ }
+
+ boolean successInject = this.policyContainer.insertAll(event);
+ if (!successInject) {
+ logger.warn("{} Failed to inject into PolicyContainer {}", this, this.getSessionNames());
+ }
+
+ FeatureApiUtils.apply(getDroolsProviders().getList(),
+ feature -> feature.afterInsert(this, event, successInject),
+ (feature, ex) -> logger.error("{}: feature {} after-insert failure because of {}", this,
+ feature.getClass().getName(), ex.getMessage(), ex));
+
+ return true;
+
+ }
+
+ @Override
+ public boolean deliver(TopicSink sink, Object event) {
+
+ logger.info("{}DELIVER: {} FROM {} TO {}", this, event, this, sink);
+
+ for (DroolsControllerFeatureApi feature : getDroolsProviders().getList()) {
+ try {
+ if (feature.beforeDeliver(this, sink, event)) {
+ return true;
+ }
+ } catch (Exception e) {
+ logger.error("{}: feature {} before-deliver failure because of {}", this, feature.getClass().getName(),
+ e.getMessage(), e);
+ }
+ }
+
+ if (sink == null) {
+ throw new IllegalArgumentException(this + " invalid sink");
+ }
+
+ if (event == null) {
+ throw new IllegalArgumentException(this + " invalid event");
+ }
+
+ if (this.locked) {
+ throw new IllegalStateException(this + " is locked");
+ }
+
+ if (!this.alive) {
+ throw new IllegalStateException(this + " is stopped");
+ }
+
+ String json =
+ getCoderManager().encode(sink.getTopic(), event, this);
+
+ synchronized (this.recentSinkEvents) {
+ this.recentSinkEvents.add(json);
+ }
+
+ boolean success = sink.send(json);
+
+ for (DroolsControllerFeatureApi feature : getDroolsProviders().getList()) {
+ try {
+ if (feature.afterDeliver(this, sink, event, json, success)) {
+ return true;
+ }
+ } catch (Exception e) {
+ logger.error("{}: feature {} after-deliver failure because of {}", this, feature.getClass().getName(),
+ e.getMessage(), e);
+ }
+ }
+
+ return success;
+
+ }
+
+ @Override
+ public String getVersion() {
+ return this.policyContainer.getVersion();
+ }
+
+ @Override
+ public String getArtifactId() {
+ return this.policyContainer.getArtifactId();
+ }
+
+ @Override
+ public String getGroupId() {
+ return this.policyContainer.getGroupId();
+ }
+
+ /**
+ * Get model class loader hash.
+ *
+ * @return the modelClassLoaderHash
+ */
+ public int getModelClassLoaderHash() {
+ return modelClassLoaderHash;
+ }
+
+ @Override
+ public synchronized boolean lock() {
+ logger.info("LOCK: {}", this);
+
+ this.locked = true;
+ return true;
+ }
+
+ @Override
+ public synchronized boolean unlock() {
+ logger.info("UNLOCK: {}", this);
+
+ this.locked = false;
+ return true;
+ }
+
+ @Override
+ public boolean isLocked() {
+ return this.locked;
+ }
+
+ @GsonJsonIgnore
+ @Override
+ public PolicyContainer getContainer() {
+ return this.policyContainer;
+ }
+
+ @GsonJsonProperty("sessions")
+ @Override
+ public List<String> getSessionNames() {
+ return getSessionNames(true);
+ }
+
+ /**
+ * get session names.
+ *
+ * @param abbreviated true for the short form, otherwise the long form
+ * @return session names
+ */
+ protected List<String> getSessionNames(boolean abbreviated) {
+ List<String> sessionNames = new ArrayList<>();
+ try {
+ for (PolicySession session: this.policyContainer.getPolicySessions()) {
+ if (abbreviated) {
+ sessionNames.add(session.getName());
+ } else {
+ sessionNames.add(session.getFullName());
+ }
+ }
+ } catch (Exception e) {
+ logger.warn("Can't retrieve CORE sessions", e);
+ sessionNames.add(e.getMessage());
+ }
+ return sessionNames;
+ }
+
+ @GsonJsonProperty("sessionCoordinates")
+ @Override
+ public List<String> getCanonicalSessionNames() {
+ return getSessionNames(false);
+ }
+
+ @Override
+ public List<String> getBaseDomainNames() {
+ return new ArrayList<>(this.policyContainer.getKieContainer().getKieBaseNames());
+ }
+
+ /**
+ * provides the underlying core layer container sessions.
+ *
+ * @return the attached Policy Container
+ */
+ protected List<PolicySession> getSessions() {
+ List<PolicySession> sessions = new ArrayList<>();
+ sessions.addAll(this.policyContainer.getPolicySessions());
+ return sessions;
+ }
+
+ /**
+ * provides the underlying core layer container session with name sessionName.
+ *
+ * @param sessionName session name
+ * @return the attached Policy Container
+ * @throws IllegalArgumentException when an invalid session name is provided
+ * @throws IllegalStateException when the drools controller is in an invalid state
+ */
+ protected PolicySession getSession(String sessionName) {
+ if (sessionName == null || sessionName.isEmpty()) {
+ throw new IllegalArgumentException("A Session Name must be provided");
+ }
+
+ List<PolicySession> sessions = this.getSessions();
+ for (PolicySession session : sessions) {
+ if (sessionName.equals(session.getName()) || sessionName.equals(session.getFullName())) {
+ return session;
+ }
+ }
+
+ throw invalidSessNameEx(sessionName);
+ }
+
+ private IllegalArgumentException invalidSessNameEx(String sessionName) {
+ return new IllegalArgumentException("Invalid Session Name: " + sessionName);
+ }
+
+ @Override
+ public Map<String, Integer> factClassNames(String sessionName) {
+ validateSessionName(sessionName);
+
+ Map<String, Integer> classNames = new HashMap<>();
+
+ PolicySession session = getSession(sessionName);
+ KieSession kieSession = session.getKieSession();
+
+ Collection<FactHandle> facts = kieSession.getFactHandles();
+ for (FactHandle fact : facts) {
+ try {
+ String className = kieSession.getObject(fact).getClass().getName();
+ if (classNames.containsKey(className)) {
+ classNames.put(className, classNames.get(className) + 1);
+ } else {
+ classNames.put(className, 1);
+ }
+ } catch (Exception e) {
+ logger.warn(FACT_RETRIEVE_ERROR, fact, e);
+ }
+ }
+
+ return classNames;
+ }
+
+ private void validateSessionName(String sessionName) {
+ if (sessionName == null || sessionName.isEmpty()) {
+ throw invalidSessNameEx(sessionName);
+ }
+ }
+
+ @Override
+ public long factCount(String sessionName) {
+ validateSessionName(sessionName);
+
+ PolicySession session = getSession(sessionName);
+ return session.getKieSession().getFactCount();
+ }
+
+ @Override
+ public List<Object> facts(String sessionName, String className, boolean delete) {
+ validateSessionName(sessionName);
+
+ if (className == null || className.isEmpty()) {
+ throw new IllegalArgumentException("Invalid Class Name: " + className);
+ }
+
+ Class<?> factClass =
+ ReflectionUtil.fetchClass(this.policyContainer.getClassLoader(), className);
+ if (factClass == null) {
+ throw new IllegalArgumentException("Class cannot be fetched in model's classloader: " + className);
+ }
+
+ PolicySession session = getSession(sessionName);
+ KieSession kieSession = session.getKieSession();
+
+ List<Object> factObjects = new ArrayList<>();
+
+ Collection<FactHandle> factHandles = kieSession.getFactHandles(new ClassObjectFilter(factClass));
+ for (FactHandle factHandle : factHandles) {
+ try {
+ factObjects.add(kieSession.getObject(factHandle));
+ if (delete) {
+ kieSession.delete(factHandle);
+ }
+ } catch (Exception e) {
+ logger.warn(FACT_RETRIEVE_ERROR, factHandle, e);
+ }
+ }
+
+ return factObjects;
+ }
+
+ @Override
+ public <T> List<T> facts(@NonNull String sessionName, @NonNull Class<T> clazz) {
+ return facts(sessionName, clazz.getName(), false)
+ .stream()
+ .filter(clazz::isInstance)
+ .map(clazz::cast)
+ .collect(Collectors.toList());
+ }
+
+ @Override
+ public List<Object> factQuery(String sessionName, String queryName, String queriedEntity,
+ boolean delete, Object... queryParams) {
+ validateSessionName(sessionName);
+
+ if (queryName == null || queryName.isEmpty()) {
+ throw new IllegalArgumentException("Invalid Query Name: " + queryName);
+ }
+
+ if (queriedEntity == null || queriedEntity.isEmpty()) {
+ throw new IllegalArgumentException("Invalid Queried Entity: " + queriedEntity);
+ }
+
+ PolicySession session = getSession(sessionName);
+ KieSession kieSession = session.getKieSession();
+
+ validateQueryName(kieSession, queryName);
+
+ List<Object> factObjects = new ArrayList<>();
+
+ QueryResults queryResults = kieSession.getQueryResults(queryName, queryParams);
+ for (QueryResultsRow row : queryResults) {
+ try {
+ factObjects.add(row.get(queriedEntity));
+ if (delete) {
+ kieSession.delete(row.getFactHandle(queriedEntity));
+ }
+ } catch (Exception e) {
+ logger.warn("Object cannot be retrieved from row: {}", row, e);
+ }
+ }
+
+ return factObjects;
+ }
+
+ private void validateQueryName(KieSession kieSession, String queryName) {
+ for (KiePackage kiePackage : kieSession.getKieBase().getKiePackages()) {
+ for (Query q : kiePackage.getQueries()) {
+ if (q.getName() != null && q.getName().equals(queryName)) {
+ return;
+ }
+ }
+ }
+
+ throw new IllegalArgumentException("Invalid Query Name: " + queryName);
+ }
+
+ @Override
+ public <T> boolean delete(@NonNull String sessionName, @NonNull T objFact) {
+ KieSession kieSession = getSession(sessionName).getKieSession();
+
+ // try first to get the object to delete first by reference
+
+ FactHandle quickFact = kieSession.getFactHandle(objFact);
+ if (quickFact != null) {
+ logger.info("Fast delete of {} from {}", objFact, sessionName);
+ kieSession.delete(quickFact);
+ return true;
+ }
+
+ // otherwise, try to the delete the fact associated with the object by scanning all
+ // facts from the same type and performing object equality. The set of facts
+ // is restricted to those of the same type
+
+ Collection<FactHandle> factHandles = kieSession.getFactHandles(new ClassObjectFilter(objFact.getClass()));
+ for (FactHandle factHandle : factHandles) {
+ if (Objects.equals(objFact, kieSession.getObject(factHandle))) {
+ logger.info("Slow delete of {} of type {} from {}",
+ objFact, objFact.getClass().getName(), sessionName);
+ kieSession.delete(factHandle);
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+ @Override
+ public <T> boolean delete(@NonNull T fact) {
+ return this.getSessionNames().stream().map(ss -> delete(ss, fact)).reduce(false, Boolean::logicalOr);
+ }
+
+ @Override
+ public <T> boolean delete(@NonNull String sessionName, @NonNull Class<T> fact) {
+ PolicySession session = getSession(sessionName);
+ KieSession kieSession = session.getKieSession();
+
+ boolean success = true;
+ Collection<FactHandle> factHandles = kieSession.getFactHandles(new ClassObjectFilter(fact));
+ for (FactHandle factHandle : factHandles) {
+ try {
+ kieSession.delete(factHandle);
+ } catch (Exception e) {
+ logger.warn(FACT_RETRIEVE_ERROR, factHandle, e);
+ success = false;
+ }
+ }
+ return success;
+ }
+
+ @Override
+ public <T> boolean delete(@NonNull Class<T> fact) {
+ return this.getSessionNames().stream().map(ss -> delete(ss, fact)).reduce(false, Boolean::logicalOr);
+ }
+
+ @Override
+ public <T> boolean exists(@NonNull String sessionName, @NonNull T objFact) {
+ KieSession kieSession = getSession(sessionName).getKieSession();
+ if (kieSession.getFactHandle(objFact) != null) {
+ return true;
+ }
+
+ // try to find the object by equality comparison instead if it could not be
+ // found by reference
+
+ Collection<FactHandle> factHandles = kieSession.getFactHandles(new ClassObjectFilter(objFact.getClass()));
+ for (FactHandle factHandle : factHandles) {
+ if (Objects.equals(objFact, kieSession.getObject(factHandle))) {
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+ @Override
+ public <T> boolean exists(@NonNull T fact) {
+ return this.getSessionNames().stream().anyMatch(ss -> exists(ss, fact));
+ }
+
+ @Override
+ public Class<?> fetchModelClass(String className) {
+ return ReflectionUtil.fetchClass(this.policyContainer.getClassLoader(), className);
+ }
+
+ /**
+ * Get recent source events.
+ *
+ * @return the recentSourceEvents
+ */
+ @Override
+ public Object[] getRecentSourceEvents() {
+ synchronized (this.recentSourceEvents) {
+ Object[] events = new Object[recentSourceEvents.size()];
+ return recentSourceEvents.toArray(events);
+ }
+ }
+
+ /**
+ * Get recent sink events.
+ *
+ * @return the recentSinkEvents
+ */
+ @Override
+ public String[] getRecentSinkEvents() {
+ synchronized (this.recentSinkEvents) {
+ String[] events = new String[recentSinkEvents.size()];
+ return recentSinkEvents.toArray(events);
+ }
+ }
+
+ @Override
+ public boolean isBrained() {
+ return true;
+ }
+
+
+ @Override
+ public String toString() {
+ StringBuilder builder = new StringBuilder();
+ builder
+ .append("MavenDroolsController [policyContainer=")
+ .append(policyContainer.getName())
+ .append(":")
+ .append(", alive=")
+ .append(alive)
+ .append(", locked=")
+ .append(", modelClassLoaderHash=")
+ .append(modelClassLoaderHash)
+ .append("]");
+ return builder.toString();
+ }
+
+ // these may be overridden by junit tests
+
+ protected EventProtocolCoder getCoderManager() {
+ return EventProtocolCoderConstants.getManager();
+ }
+
+ protected OrderedServiceImpl<DroolsControllerFeatureApi> getDroolsProviders() {
+ return DroolsControllerFeatureApiConstants.getProviders();
+ }
+
+ protected PolicyContainer makePolicyContainer(String groupId, String artifactId, String version) {
+ return new PolicyContainer(groupId, artifactId, version);
+ }
+
+ protected boolean isClass(String className) {
+ return ReflectionUtil.isClass(this.policyContainer.getClassLoader(), className);
+ }