Examples of PersistenceBroker

ojb.broker.PersistenceBroker
org.apache.ojb.broker.PersistenceBroker
PersistenceBroker declares a protocol for persisting arbitrary objects. A typical implementation might wrap an RDBMS access layer. @see org.apache.ojb.broker.core.PersistenceBrokerImpl @see org.apache.ojb.broker.core.PersistenceBrokerBean @author Thomas Mahler @version $Id: PersistenceBroker.java,v 1.30.2.6 2005/12/22 20:40:17 tomdz Exp $

Examples of org.apache.ojb.broker.PersistenceBroker

        ManageableCollection result = null;


        try
        {
            capsule = new PBCapsule(odmg.getCurrentPBKey(), tx);
            PersistenceBroker broker = capsule.getBroker();


            // ask the broker to perfom the query.
            // the concrete result type is configurable


            if (!(query instanceof ReportQuery))
            {
                result = broker.getCollectionByQuery(this.getCollectionClass(), query);
                performLockingIfRequired(tx, broker, result);
            }
            else
            {
                Iterator iter = null;
                result = new ManageableArrayList();
                iter = broker.getReportQueryIteratorByQuery(query);
                try
                {
                    while (iter.hasNext())
                    {
                        Object[] res = (Object[]) iter.next();

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Examples of org.apache.ojb.broker.PersistenceBroker

        b. check if the object is already registered
        c. lookup from cache and if not found, last option select on DB
        */
        if(!isNew)
        {
            final PersistenceBroker pb = getBroker();
            if(cld == null)
            {
                cld = pb.getClassDescriptor(obj.getClass());
            }
            isNew = pb.serviceBrokerHelper().hasNullPKField(cld, obj);
            if(!isNew)
            {
                if(oid == null)
                {
                    oid = pb.serviceIdentity().buildIdentity(cld, obj);
                }
                final ObjectEnvelope mod = objectEnvelopeTable.getByIdentity(oid);
                if(mod != null)
                {
                    // already registered object, use current state
                    isNew = mod.needsInsert();
                }
                else
                {
                    // if object was found cache, assume it's old
                    // else make costly check against the DB
                    isNew = pb.serviceObjectCache().lookup(oid) == null
                            && !pb.serviceBrokerHelper().doesExist(cld, oid, obj);
                }
            }
        }
        return isNew;
    }

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Examples of org.apache.ojb.broker.PersistenceBroker

     * returns the LockEntry for the Writer of object obj.
     * If now writer exists, null is returned.
     */
    public LockEntry getWriter(Object obj)
    {
        PersistenceBroker broker = getBroker();
        Identity oid = new Identity(obj, broker); 
        return getWriter(oid);
    }

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Examples of org.apache.ojb.broker.PersistenceBroker

     *
     * @return the resulting ObjectEnvelope
     */
    public ObjectEnvelope get(Object pKey, boolean isNew)
    {
        PersistenceBroker broker = transaction.getBroker();
        Identity oid = broker.serviceIdentity().buildIdentity(pKey);
        return get(oid, pKey, isNew);
    }

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Examples of org.apache.ojb.broker.PersistenceBroker

        }
    }


    private void cascadeDeleteCollectionReferences(ObjectEnvelope source, List descriptor, List alreadyPrepared)
    {
        PersistenceBroker pb = getTransaction().getBroker();
        for(int i = 0; i < descriptor.size(); i++)
        {
            CollectionDescriptor col = (CollectionDescriptor) descriptor.get(i);
            boolean cascadeDelete = getTransaction().cascadeDeleteFor(col);
            Object collOrArray = col.getPersistentField().get(source.getObject());
            // TODO: remove cast
            CollectionProxyDefaultImpl proxy = (CollectionProxyDefaultImpl) ProxyHelper.getCollectionProxy(collOrArray);
            // on delete we have to materialize dependent objects
            if(proxy != null)
            {
                collOrArray = proxy.getData();
            }
            if(collOrArray != null)
            {
                Iterator it = BrokerHelper.getCollectionIterator(collOrArray);
                while(it.hasNext())
                {
                    Object colObj = ProxyHelper.getRealObject(it.next());
                    Identity oid = pb.serviceIdentity().buildIdentity(colObj);
                    ObjectEnvelope colMod = get(oid, colObj, false);
                    if(cascadeDelete)
                    {
                        colMod.setModificationState(colMod.getModificationState().markDelete());
                        cascadeDeleteFor(colMod, alreadyPrepared);

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Examples of org.apache.ojb.broker.PersistenceBroker

        m2nLinkList.add(new LinkEntryMtoN(leftSource, cod, rightSource, false));
    }


    void performM2NLinkEntries()
    {
        PersistenceBroker broker = getTransaction().getBroker();
        LinkEntry entry;
        for(int i = 0; i < m2nLinkList.size(); i++)
        {
            entry = (LinkEntry) m2nLinkList.get(i);
            entry.execute(broker);

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Examples of org.apache.ojb.broker.PersistenceBroker

        m2nUnlinkList.add(new LinkEntryMtoN(leftSource, cod, rightSource, true));
    }


    void performM2NUnlinkEntries()
    {
        PersistenceBroker broker = getTransaction().getBroker();
        LinkEntry entry;
        for(int i = 0; i < m2nUnlinkList.size(); i++)
        {
            entry = (LinkEntry) m2nUnlinkList.get(i);
            entry.execute(broker);

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Examples of org.apache.ojb.broker.PersistenceBroker

        TransactionImpl tx = getTransaction();


        OQLQuery predicateQuery = tx.getImplementation().newOQLQuery();


        PBCapsule capsule = new PBCapsule(tx.getImplementation().getCurrentPBKey(), tx);
        PersistenceBroker broker = capsule.getBroker();


        try
        {
            predicateQuery.create(oql);
            Query pQ = ((OQLQueryImpl) predicateQuery).getQuery();
            Criteria pCrit = pQ.getCriteria();


            Criteria allElementsCriteria = this.getPkCriteriaForAllElements(broker);
            // join selection of elements with predicate criteria:
            pCrit.addAndCriteria(allElementsCriteria);
            Class clazz = this.getElementsExtentClass(broker);
            Query q = new QueryByCriteria(clazz, pCrit);
            if (log.isDebugEnabled()) log.debug(q.toString());
            // 2. perfom query
            return (DSetImpl) broker.getCollectionByQuery(DSetImpl.class, q);
        }
        catch (PersistenceBrokerException e)
        {
            throw new ODMGRuntimeException(e.getMessage());
        }

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Examples of org.apache.ojb.broker.PersistenceBroker

    {
        if(deletionMap == null)
            return;
        else
        {
            PersistenceBroker broker = tx.getBroker();
            Iterator it = deletionMap.values().iterator();
            while(it.hasNext())
            {
                NamedEntry namedEntry = (NamedEntry) it.next();
                broker.delete(namedEntry);
            }
        }
    }

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Examples of org.apache.ojb.broker.PersistenceBroker

    {
        if(insertMap == null)
            return;
        else
        {
            PersistenceBroker broker = tx.getBroker();
            Iterator it = insertMap.values().iterator();
            while(it.hasNext())
            {
                NamedEntry namedEntry = (NamedEntry) it.next();
                namedEntry.prepareForStore(broker);
                broker.store(namedEntry, ObjectModification.INSERT);
            }
        }
    }

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