Examples with IPersistent org.jaffa.persistence.IPersistent used on opensource projects

Example 26 with IPersistent

use of org.jaffa.persistence.IPersistent in project jaffa-framework by jaffa-projects.

the class DatabasePoller method poll.

/**
 * Polls the database for a row represented by the input domain object. This
 * will reload the row in a new UOW with paranoid locking, and then invoke
 * the process() method on the reloaded domain object.
 * @param domain The domain object.
 */
protected void poll(final IPersistent domain) {
    UserContextWrapper ucw = null;
    UOW uow = null;
    try {
        // Setup the user context based on the person who created the row in
        // the database.
        ucw = UserContextWrapperFactory.instance(findCreatedBy(domain));
        // Reload the input domain object in a new UOW with paranoid locking
        // NOTE: Another thread may have modified some flags on the
        // underlying record; in which case a
        // primary-key-based query will still reload the object. But we want
        // to avoid re-processing that object.
        // Hence re-apply the original filters
        uow = new UOW();
        final Criteria criteria = PersistentHelper.generateKeyCriteria(domain);
        customizeCriteria(criteria);
        criteria.setLocking(Criteria.LOCKING_PARANOID);
        final Iterator<IPersistent> i = uow.query(criteria).iterator();
        if (i.hasNext()) {
            process(i.next());
            uow.commit();
        } else {
            LOGGER.error(this.getClass().getSimpleName() + ": Unable to reload domain object. It may already have been processed by another thread. " + domain);
        }
    } catch (Exception e) {
        if (ExceptionHelper.extractException(e, LockedApplicationException.class) != null) {
            LOGGER.error(this.getClass().getSimpleName() + ": Error in reloading domain object. It may be locked by another thread. " + domain, e);
        } else
            LOGGER.error(this.getClass().getSimpleName() + ": Error in polling domain object " + domain, e);
    } finally {
        try {
            if (uow != null)
                uow.rollback();
        } catch (Exception e) {
            LOGGER.error(this.getClass().getSimpleName() + ": Error in closing UOW", e);
        }
        if (ucw != null)
            ucw.unsetContext();
    }
}

Example 27 with IPersistent

use of org.jaffa.persistence.IPersistent in project jaffa-framework by jaffa-projects.

the class DataTransformer method findRelatedObjects.

/**
 * Retrieves the related object, as specified by the relatedObjectClass, from the input domain object.
 * It'll utilize the findXyzCriteria() method, if available, to build the query, as well as to fire the handler.
 * Else it'll utilize the getXyzArray() method, which may cache a huge number of objects.
 *
 * @param domain              The domain object against which the query is to be invoked.
 * @param relatedObjectClass  The Class of the related object.
 * @param relatedObjectGetter The getter for obtaining the array of related objects.
 * @param handler             The handler, if passed, will be invoked prior to retrieving the related object.
 * @param originalCriteria    The original Criteria used for the query. This is passed to the handler.
 * @param path                This is the source path of this graph, used when processing a more complex tree, where this is the path to get to this root object being processed.
 * @return an array of related objects.
 * @throws IllegalAccessException    if the relatedObjectGetter is not accessible.
 * @throws InvocationTargetException if any error occurs during invocation of the relatedObjectGetter.
 */
private static Object[] findRelatedObjects(Object domain, Class relatedObjectClass, Method relatedObjectGetter, ITransformationHandler handler, GraphCriteria originalCriteria, String path) throws IllegalAccessException, InvocationTargetException {
    // The Getter typically caches the related objects. Hence try to locate the corresponding findXyzCriteria() method
    try {
        Matcher m = RELATED_OBJECT_GETTER.matcher(relatedObjectGetter.getName());
        if (m.matches()) {
            Method criteriaMethod = domain.getClass().getMethod("find" + m.group(1) + "Criteria");
            if (Criteria.class.isAssignableFrom(criteriaMethod.getReturnType())) {
                Criteria criteria = (Criteria) criteriaMethod.invoke(domain);
                // Invoke the handler
                if (handler != null) {
                    if (log.isDebugEnabled()) {
                        log.debug("Invoking the preQuery on the handler");
                    }
                    for (ITransformationHandler transformationHandler : handler.getTransformationHandlers()) {
                        Criteria handlerCriteria = transformationHandler.preQuery(path, criteria, originalCriteria, relatedObjectClass);
                        if (handlerCriteria != null) {
                            criteria = handlerCriteria;
                        }
                    }
                }
                if (criteria == null) {
                    // The handler will return a null if this query is not to be performed
                    return null;
                } else {
                    UOW uow = domain instanceof IPersistent ? ((IPersistent) domain).getUOW() : null;
                    boolean localUow = uow == null;
                    try {
                        if (localUow)
                            uow = new UOW();
                        Collection col = uow.query(criteria);
                        // Iterate through the Collection to retrieve all the objects
                        for (Object o : col) {
                        }
                        return col.toArray();
                    } finally {
                        if (localUow && uow != null)
                            uow.rollback();
                    }
                }
            } else {
                if (log.isDebugEnabled())
                    log.debug("Method '" + criteriaMethod.getName() + "' does not does not return a Criteria. Will invoke the method '" + relatedObjectGetter.getName() + "' directly to obtain the related object");
            }
        } else {
            if (log.isDebugEnabled())
                log.debug("Method '" + relatedObjectGetter.getName() + "' does not match the pattern '" + RELATED_OBJECT_GETTER + "'. Will invoke the method directly to obtain the related object");
        }
    } catch (Exception e) {
        // do nothing
        if (log.isDebugEnabled())
            log.debug("Exception thrown during creation of the criteria for the related object or while retrieving it. Will invoke the method '" + relatedObjectGetter.getName() + "' directly to obtain the related object", e);
    }
    // There must have been an error in invoking the findXyzCriteria() method. Simply invoke the Getter
    return (Object[]) relatedObjectGetter.invoke(domain);
}

Example 28 with IPersistent

use of org.jaffa.persistence.IPersistent in project jaffa-framework by jaffa-projects.

the class TransformerUtils method deleteChildBean.

/**
 * Take a source object and try and mold it back it its domain object.
 * This is the same as updateParent, except from the way it retrieved the
 * record, and the way it creates a new record.
 */
static void deleteChildBean(String path, GraphDataObject source, UOW uow, ITransformationHandler handler, IPersistent parentDomain, GraphMapping parentMapping, String parentField) throws ApplicationExceptions, FrameworkException {
    if (log.isDebugEnabled())
        log.debug("Delete Child Bean " + path);
    String relationshipName = parentMapping.getDomainFieldName(parentField);
    if (relationshipName.endsWith("Array"))
        relationshipName = relationshipName.substring(0, relationshipName.length() - 5);
    if (relationshipName.endsWith("Object"))
        relationshipName = relationshipName.substring(0, relationshipName.length() - 6);
    try {
        IPersistent domainObject = null;
        GraphMapping mapping = MappingFactory.getInstance(source);
        Map keys = new LinkedHashMap();
        Class doClass = mapping.getDomainClass();
        boolean gotKeys = false;
        // if (mapping.getKeyFields() == null || mapping.getKeyFields().size() == 0) {
        if (path == null || path.charAt(path.length() - 1) != ']') {
            if (log.isDebugEnabled())
                log.debug("Find 'one-to-one' object - " + path);
            // Just use the getXxxObject method to get the related domain object,
            // if there is one...
            domainObject = (IPersistent) getProperty(parentMapping.getDomainFieldDescriptor(parentField), parentDomain);
            if (domainObject == null) {
                if (log.isDebugEnabled())
                    log.debug("Not Found - " + path);
            }
        } else {
            // Get the key fields used in the domain object. Use the findXxxxxCriteria() method,
            // then add the extra fields to the criteria object, to get the unique record.
            gotKeys = fillInKeys(path, source, mapping, keys);
            // read DO based on key
            if (gotKeys) {
                // get the method to get the PK criteria (i.e. public Criteria findVendorSiteCriteria(); )
                Method findCriteria = null;
                String methodName = "find" + StringHelper.getUpper1(relationshipName) + "Criteria";
                try {
                    findCriteria = parentDomain.getClass().getMethod(methodName, new Class[] {});
                } catch (NoSuchMethodException e) {
                    log.error("Find method '" + methodName + "' not found!");
                }
                if (findCriteria == null)
                    throw new TransformException(TransformException.METHOD_NOT_FOUND, path, methodName);
                // Find Criteria For Related Object
                Criteria criteria = (Criteria) findCriteria.invoke(parentDomain, new Object[] {});
                // Add extra key info...
                for (Iterator it = keys.keySet().iterator(); it.hasNext(); ) {
                    String keyField = (String) it.next();
                    Object value = keys.get(keyField);
                    keyField = StringHelper.getUpper1(mapping.getDomainFieldName(keyField));
                    criteria.addCriteria(keyField, value);
                    if (log.isDebugEnabled())
                        log.debug(path + "- Add to criteria:" + keyField + '=' + value);
                }
                // See if we get an object :-)
                Iterator itr = uow.query(criteria).iterator();
                if (itr.hasNext())
                    domainObject = (IPersistent) itr.next();
                if (itr.hasNext()) {
                    // Error, multiple objects found
                    throw new ApplicationExceptions(new ApplicationExceptionWithContext(path, new MultipleDomainObjectsFoundException(findDomainLabel(criteria.getTable()))));
                }
            }
        }
        // Error if DO not found
        if (domainObject == null)
            throw new ApplicationExceptions(new ApplicationExceptionWithContext(path, new DomainObjectNotFoundException(findDomainLabel(doClass))));
        // Process the delete, either on this DO, or a related DO if there is one
        deleteBeanData(path, source, uow, handler, mapping, domainObject);
    } catch (IllegalAccessException e) {
        TransformException me = new TransformException(TransformException.ACCESS_ERROR, path, e.getMessage());
        log.error(me.getLocalizedMessage(), e);
        throw me;
    } catch (InvocationTargetException e) {
        ApplicationExceptions appExps = ExceptionHelper.extractApplicationExceptions(e);
        if (appExps != null)
            throw appExps;
        FrameworkException fe = ExceptionHelper.extractFrameworkException(e);
        if (fe != null)
            throw fe;
        TransformException me = new TransformException(TransformException.INVOCATION_ERROR, path, e);
        log.error(me.getLocalizedMessage(), me.getCause());
        throw me;
    } catch (InstantiationException e) {
        TransformException me = new TransformException(TransformException.INSTANTICATION_ERROR, path, e.getMessage());
        log.error(me.getLocalizedMessage(), e);
        throw me;
    }
}

Example 29 with IPersistent

use of org.jaffa.persistence.IPersistent in project jaffa-framework by jaffa-projects.

the class TransformerUtils method updateChildBean.

/**
 * Take a source object and try and mold it back it its domain object.
 * This is the same as updateParent, except from the way it retrieved the
 * record, and the way it creates a new record.
 */
static void updateChildBean(String path, GraphDataObject source, UOW uow, ITransformationHandler handler, IPersistent parentDomain, GraphMapping parentMapping, String parentField, DataTransformer.Mode mode, GraphDataObject newGraph) throws ApplicationExceptions, FrameworkException {
    if (log.isDebugEnabled())
        log.debug("Update Child Bean " + path);
    String relationshipName = parentMapping.getDomainFieldName(parentField);
    if (relationshipName.endsWith("Array"))
        relationshipName = relationshipName.substring(0, relationshipName.length() - 5);
    if (relationshipName.endsWith("Object"))
        relationshipName = relationshipName.substring(0, relationshipName.length() - 6);
    try {
        IPersistent domainObject = null;
        GraphMapping mapping = MappingFactory.getInstance(source);
        Map keys = new LinkedHashMap();
        Class doClass = mapping.getDomainClass();
        boolean gotKeys = false;
        // if (mapping.getKeyFields() == null || mapping.getKeyFields().size() == 0) {
        if (path == null || path.charAt(path.length() - 1) != ']') {
            if (log.isDebugEnabled())
                log.debug("Find 'one-to-one' object - " + path);
            // Just use the getXxxObject method to get the related domain object,
            // if there is one...
            domainObject = (IPersistent) getProperty(parentMapping.getDomainFieldDescriptor(parentField), parentDomain);
            if (domainObject == null) {
                if (log.isDebugEnabled())
                    log.debug("Not Found - " + path);
            }
        } else if (mode == DataTransformer.Mode.CLONE) {
            // In CLONE mode, get the keys from the new graph, and force the creation of the domain object
            if (newGraph != null)
                fillInKeys(path, newGraph, mapping, keys);
        } else {
            // Get the key fields used in the domain object. Use the findXxxxxCriteria() method,
            // then add the extra fields to the criteria object, to get the unique record.
            gotKeys = fillInKeys(path, source, mapping, keys);
            // read DO based on key
            if (gotKeys) {
                // get the method to get the PK criteria (i.e. public Criteria findVendorSiteCriteria(); )
                Method findCriteria = null;
                String methodName = "find" + StringHelper.getUpper1(relationshipName) + "Criteria";
                try {
                    findCriteria = parentDomain.getClass().getMethod(methodName, new Class[] {});
                } catch (NoSuchMethodException e) {
                    log.error("Find method '" + methodName + "' not found!");
                }
                if (findCriteria == null)
                    throw new TransformException(TransformException.METHOD_NOT_FOUND, path, methodName);
                // Find Criteria For Related Object
                Criteria criteria = (Criteria) findCriteria.invoke(parentDomain, new Object[] {});
                // Add extra key info...
                for (Iterator it = keys.keySet().iterator(); it.hasNext(); ) {
                    String keyField = (String) it.next();
                    Object value = keys.get(keyField);
                    keyField = StringHelper.getUpper1(mapping.getDomainFieldName(keyField));
                    criteria.addCriteria(keyField, value);
                    if (log.isDebugEnabled())
                        log.debug(path + "- Add to criteria:" + keyField + '=' + value);
                }
                // See if we get an object :-)
                Iterator itr = uow.query(criteria).iterator();
                if (itr.hasNext())
                    domainObject = (IPersistent) itr.next();
                if (itr.hasNext()) {
                    // Error, multiple objects found
                    throw new ApplicationExceptions(new ApplicationExceptionWithContext(path, new MultipleDomainObjectsFoundException(findDomainLabel(criteria.getTable()))));
                }
            } else {
                if (log.isDebugEnabled())
                    log.debug("Object " + path + " has either missing or null key values - Assume Create is needed");
            }
        }
        // Create object if not found
        if (domainObject == null) {
            // In MASS_UPDATE mode, error if DO not found
            if (mode == DataTransformer.Mode.MASS_UPDATE)
                throw new ApplicationExceptions(new ApplicationExceptionWithContext(path, new DomainObjectNotFoundException(TransformerUtils.findDomainLabel(doClass))));
            // NEW OBJECT, create and reflect keys
            if (log.isDebugEnabled())
                log.debug("DO '" + mapping.getDomainClassShortName() + "' not found with key, create a new one...");
            // find method on parent used to create object
            Method newObject = null;
            String methodName = "new" + StringHelper.getUpper1(relationshipName) + "Object";
            try {
                newObject = parentDomain.getClass().getMethod(methodName, new Class[] {});
            } catch (NoSuchMethodException e) {
                log.error("Method '" + methodName + "()' not found!");
            }
            if (newObject == null)
                throw new TransformException(TransformException.METHOD_NOT_FOUND, path, methodName);
            // Call method to create object
            domainObject = (IPersistent) newObject.invoke(parentDomain, new Object[] {});
            // Set the key fields
            for (Iterator it = keys.keySet().iterator(); it.hasNext(); ) {
                String keyField = (String) it.next();
                if (mapping.isReadOnly(keyField))
                    continue;
                Object value = keys.get(keyField);
                updateProperty(mapping.getDomainFieldDescriptor(keyField), value, domainObject);
            }
        } else {
            if (log.isDebugEnabled())
                log.debug("Found DO '" + mapping.getDomainClassShortName() + "' with key,");
        }
        // Now update all domain fields
        updateBeanData(path, source, uow, handler, mapping, domainObject, mode, newGraph);
    } catch (IllegalAccessException e) {
        TransformException me = new TransformException(TransformException.ACCESS_ERROR, path, e.getMessage());
        log.error(me.getLocalizedMessage(), e);
        throw me;
    } catch (InvocationTargetException e) {
        ApplicationExceptions appExps = ExceptionHelper.extractApplicationExceptions(e);
        if (appExps != null)
            throw appExps;
        FrameworkException fe = ExceptionHelper.extractFrameworkException(e);
        if (fe != null)
            throw fe;
        TransformException me = new TransformException(TransformException.INVOCATION_ERROR, path, e);
        log.error(me.getLocalizedMessage(), me.getCause());
        throw me;
    } catch (InstantiationException e) {
        TransformException me = new TransformException(TransformException.INSTANTICATION_ERROR, path, e.getMessage());
        log.error(me.getLocalizedMessage(), e);
        throw me;
    }
}