Examples with IdentityStringTranslator org.datanucleus.identity.IdentityStringTranslator used on opensource projects

Example 1 with IdentityStringTranslator

use of org.datanucleus.identity.IdentityStringTranslator in project datanucleus-core by datanucleus.

the class ExecutionContextImpl method findObjectsById.

/**
 * Accessor for objects with the specified identities.
 * @param identities Ids of the object(s).
 * @param validate Whether to validate the object state
 * @return The Objects with these ids (same order)
 * @throws NucleusObjectNotFoundException if an object doesn't exist in the datastore
 */
public Object[] findObjectsById(Object[] identities, boolean validate) {
    if (identities == null) {
        return null;
    } else if (identities.length == 1) {
        return new Object[] { findObject(identities[0], validate, validate, null) };
    }
    for (int i = 0; i < identities.length; i++) {
        if (identities[i] == null) {
            throw new NucleusUserException(Localiser.msg("010044"));
        }
    }
    // Set the identities array
    Object[] ids = new Object[identities.length];
    for (int i = 0; i < identities.length; i++) {
        // Translate the identity if required
        if (identities[i] instanceof String) {
            IdentityStringTranslator idStringTranslator = getNucleusContext().getIdentityManager().getIdentityStringTranslator();
            if (idStringTranslator != null) {
                // DataNucleus extension to translate input identities into valid persistent identities.
                ids[i] = idStringTranslator.getIdentity(this, (String) identities[i]);
                continue;
            }
        }
        ids[i] = identities[i];
    }
    Map pcById = new HashMap(identities.length);
    List idsToFind = new ArrayList();
    ApiAdapter api = getApiAdapter();
    // Check the L1 cache
    for (int i = 0; i < ids.length; i++) {
        Object pc = getObjectFromLevel1Cache(ids[i]);
        if (pc != null) {
            if (ids[i] instanceof SCOID) {
                if (api.isPersistent(pc) && !api.isNew(pc) && !api.isDeleted(pc) && !api.isTransactional(pc)) {
                    // JDO [5.4.4] Can't return HOLLOW nondurable objects
                    throw new NucleusUserException(Localiser.msg("010005"));
                }
            }
            pcById.put(ids[i], pc);
        } else {
            idsToFind.add(ids[i]);
        }
    }
    if (!idsToFind.isEmpty() && l2CacheEnabled) {
        // Check the L2 cache for those not found
        Map pcsById = getObjectsFromLevel2Cache(idsToFind);
        if (!pcsById.isEmpty()) {
            // Found some so add to the values, and remove from the "toFind" list
            Iterator<Map.Entry> entryIter = pcsById.entrySet().iterator();
            while (entryIter.hasNext()) {
                Map.Entry entry = entryIter.next();
                pcById.put(entry.getKey(), entry.getValue());
                idsToFind.remove(entry.getKey());
            }
        }
    }
    boolean performValidationWhenCached = nucCtx.getConfiguration().getBooleanProperty(PropertyNames.PROPERTY_FIND_OBJECT_VALIDATE_WHEN_CACHED);
    List<ObjectProvider> opsToValidate = new ArrayList<>();
    if (validate) {
        if (performValidationWhenCached) {
            // Mark all ObjectProviders for validation (performed at end)
            Collection pcValues = pcById.values();
            for (Object pc : pcValues) {
                if (api.isTransactional(pc)) {
                    // This object is transactional, so no need to validate
                    continue;
                }
                // Mark this object for validation
                ObjectProvider op = findObjectProvider(pc);
                opsToValidate.add(op);
            }
        }
    }
    Object[] foundPcs = null;
    if (!idsToFind.isEmpty()) {
        // Try to find unresolved objects direct from the datastore if supported by the datastore (e.g ODBMS)
        foundPcs = getStoreManager().getPersistenceHandler().findObjects(this, idsToFind.toArray());
    }
    int foundPcIdx = 0;
    for (Object id : idsToFind) {
        // Id target class could change due to inheritance level
        Object idOrig = id;
        Object pc = foundPcs != null ? foundPcs[foundPcIdx++] : null;
        ObjectProvider op = null;
        if (pc != null) {
            // Object created by store plugin
            op = findObjectProvider(pc);
            putObjectIntoLevel1Cache(op);
        } else {
            // Object not found yet, so maybe class name is not correct inheritance level
            ClassDetailsForId details = getClassDetailsForId(id, null, validate);
            String className = details.className;
            id = details.id;
            if (details.pc != null) {
                // Found in cache from updated id
                pc = details.pc;
                op = findObjectProvider(pc);
                if (performValidationWhenCached && validate) {
                    if (!api.isTransactional(pc)) {
                        // Mark this object for validation
                        opsToValidate.add(op);
                    }
                }
            } else {
                // Still not found so create a Hollow instance with the supplied field values
                try {
                    Class pcClass = clr.classForName(className, (id instanceof DatastoreId) ? null : id.getClass().getClassLoader());
                    if (Modifier.isAbstract(pcClass.getModifiers())) {
                        // This class is abstract so impossible to have an instance of this type
                        throw new NucleusObjectNotFoundException(Localiser.msg("010027", IdentityUtils.getPersistableIdentityForId(id), className));
                    }
                    op = nucCtx.getObjectProviderFactory().newForHollow(this, pcClass, id);
                    pc = op.getObject();
                    if (!validate) {
                        // Mark the ObjectProvider as needing to validate this object before loading fields
                        op.markForInheritanceValidation();
                    }
                    // Cache it in case we have bidir relations
                    putObjectIntoLevel1Cache(op);
                } catch (ClassNotResolvedException e) {
                    NucleusLogger.PERSISTENCE.warn(Localiser.msg("010027", IdentityUtils.getPersistableIdentityForId(id)));
                    throw new NucleusUserException(Localiser.msg("010027", IdentityUtils.getPersistableIdentityForId(id)), e);
                }
                if (validate) {
                    // Mark this object for validation
                    opsToValidate.add(op);
                }
            }
        }
        // Put in map under input id, so we find it later
        pcById.put(idOrig, pc);
    }
    if (!opsToValidate.isEmpty()) {
        // Validate the objects that need it
        try {
            getStoreManager().getPersistenceHandler().locateObjects(opsToValidate.toArray(new ObjectProvider[opsToValidate.size()]));
        } catch (NucleusObjectNotFoundException nonfe) {
            NucleusObjectNotFoundException[] nonfes = (NucleusObjectNotFoundException[]) nonfe.getNestedExceptions();
            if (nonfes != null) {
                for (int i = 0; i < nonfes.length; i++) {
                    Object missingId = nonfes[i].getFailedObject();
                    removeObjectFromLevel1Cache(missingId);
                }
            }
            throw nonfe;
        }
    }
    Object[] objs = new Object[ids.length];
    for (int i = 0; i < ids.length; i++) {
        Object id = ids[i];
        objs[i] = pcById.get(id);
    }
    return objs;
}

Example 2 with IdentityStringTranslator

use of org.datanucleus.identity.IdentityStringTranslator in project datanucleus-core by datanucleus.

the class ExecutionContextImpl method findObject.

/**
 * Accessor for an object given the object id. If validate is false, we return the object
 * if found in the cache, or otherwise a Hollow object with that id. If validate is true
 * we check with the datastore and return an object with the FetchPlan fields loaded.
 * TODO Would be nice, when using checkInheritance, to be able to specify the "id" is an instance of class X or subclass. See IdentityUtils where we have the min class
 * @param id Id of the object.
 * @param validate Whether to validate the object state
 * @param checkInheritance Whether look to the database to determine which class this object is.
 * @param objectClassName Class name for the object with this id (if known, optional)
 * @return The Object with this id
 * @throws NucleusObjectNotFoundException if the object doesn't exist in the datastore
 */
public Object findObject(Object id, boolean validate, boolean checkInheritance, String objectClassName) {
    if (id == null) {
        throw new NucleusUserException(Localiser.msg("010044"));
    }
    IdentityStringTranslator translator = getNucleusContext().getIdentityManager().getIdentityStringTranslator();
    if (translator != null && id instanceof String) {
        // DataNucleus extension to translate input identities into valid persistent identities.
        id = translator.getIdentity(this, (String) id);
    }
    ApiAdapter api = getApiAdapter();
    boolean fromCache = false;
    // try to find object in cache(s)
    Object pc = getObjectFromCache(id);
    ObjectProvider op = null;
    if (pc != null) {
        // Found in L1/L2 cache
        fromCache = true;
        if (id instanceof SCOID) {
            if (api.isPersistent(pc) && !api.isNew(pc) && !api.isDeleted(pc) && !api.isTransactional(pc)) {
                // JDO [5.4.4] Cant return HOLLOW nondurable objects
                throw new NucleusUserException(Localiser.msg("010005"));
            }
        }
        if (api.isTransactional(pc)) {
            // JDO [12.6.5] If there's already an object with the same id and it's transactional, return it
            return pc;
        }
        op = findObjectProvider(pc);
    } else {
        // Find it direct from the store if the store supports that
        pc = getStoreManager().getPersistenceHandler().findObject(this, id);
        if (pc != null) {
            op = findObjectProvider(pc);
            putObjectIntoLevel1Cache(op);
            putObjectIntoLevel2Cache(op, false);
        } else {
            // Object not found yet, so maybe class name is not correct inheritance level
            ClassDetailsForId details = getClassDetailsForId(id, objectClassName, checkInheritance);
            String className = details.className;
            id = details.id;
            if (details.pc != null) {
                // Found during inheritance check via the cache
                pc = details.pc;
                op = findObjectProvider(pc);
                fromCache = true;
            } else {
                // Still not found, so create a Hollow instance with supplied PK values if possible
                try {
                    Class pcClass = clr.classForName(className, (id instanceof DatastoreId) ? null : id.getClass().getClassLoader());
                    if (Modifier.isAbstract(pcClass.getModifiers())) {
                        // This class is abstract so impossible to have an instance of this type
                        throw new NucleusObjectNotFoundException(Localiser.msg("010027", IdentityUtils.getPersistableIdentityForId(id), className));
                    }
                    op = nucCtx.getObjectProviderFactory().newForHollow(this, pcClass, id);
                    pc = op.getObject();
                    if (!checkInheritance && !validate) {
                        // Mark the ObjectProvider as needing to validate this object before loading fields
                        op.markForInheritanceValidation();
                    }
                    // Cache the object in case we have bidirectional relations that would need to find this
                    putObjectIntoLevel1Cache(op);
                } catch (ClassNotResolvedException e) {
                    NucleusLogger.PERSISTENCE.warn(Localiser.msg("010027", IdentityUtils.getPersistableIdentityForId(id)));
                    throw new NucleusUserException(Localiser.msg("010027", IdentityUtils.getPersistableIdentityForId(id)), e);
                }
            }
        }
    }
    boolean performValidationWhenCached = nucCtx.getConfiguration().getBooleanProperty(PropertyNames.PROPERTY_FIND_OBJECT_VALIDATE_WHEN_CACHED);
    if (validate && (!fromCache || performValidationWhenCached)) {
        // loading any fetchplan fields that are needed in the process.
        if (!fromCache) {
            // Cache the object in case we have bidirectional relations that would need to find this
            putObjectIntoLevel1Cache(op);
        }
        try {
            op.validate();
            if (op.getObject() != pc) {
                // Underlying object was changed in the validation process. This can happen when the datastore
                // is responsible for managing object references and it no longer recognises the cached value.
                fromCache = false;
                pc = op.getObject();
                putObjectIntoLevel1Cache(op);
            }
        } catch (NucleusObjectNotFoundException onfe) {
            // Object doesn't exist, so remove from L1 cache
            removeObjectFromLevel1Cache(op.getInternalObjectId());
            throw onfe;
        }
    }
    if (!fromCache) {
        // Cache the object (update it if already present)
        putObjectIntoLevel2Cache(op, false);
    }
    return pc;
}