Examples of org.apache.commons.transaction.memory.TransactionalMapWrapper$TxContext

org.apache.commons.transaction.memory.TransactionalMapWrapper

Wrapper that adds transactional control to all kinds of maps that implement the {@link Map} interface.This wrapper has rather weak isolation, but is simply, neven blocks and commits will never fail for logical reasons.
Start a transaction by calling {@link #startTransaction()}. Then perform the normal actions on the map and finally either call {@link #commitTransaction()} to make your changes permanent or {@link #rollbackTransaction()} toundo them.
Caution: Do not modify values retrieved by {@link #get(Object)} as this will circumvent the transactional mechanism.Rather clone the value or copy it in a way you see fit and store it back using {@link #put(Object,Object)}.
Note: This wrapper guarantees isolation level READ COMMITTED only. I.e. as soon a value is committed in one transaction it will be immediately visible in all other concurrent transactions. @version $Revision: 1.1 $ @see OptimisticMapWrapper @see PessimisticMapWrapper


    protected Map maps = new HashMap();


    public synchronized TransactionalMapWrapper lookup(Object id) {


        TransactionalMapWrapper map = (TransactionalMapWrapper) maps.get(id);
        // XXX simply create it when not there
        if (map == null) {
            map = new TransactionalMapWrapper(new HashMap());
            maps.put(id, map);
        }


        return map;
    }


    protected Map maps = new HashMap();


    public synchronized TransactionalMapWrapper lookup(Object id) {


        TransactionalMapWrapper map = (TransactionalMapWrapper) maps.get(id);
        // XXX simply create it when not there
        if (map == null) {
            map = new TransactionalMapWrapper(new HashMap());
            maps.put(id, map);
        }


        return map;
    }


    protected Map maps = new HashMap();


    public synchronized TransactionalMapWrapper lookup(Object id) {


        TransactionalMapWrapper map = (TransactionalMapWrapper) maps.get(id);
        // XXX simply create it when not there
        if (map == null) {
            map = new TransactionalMapWrapper(new HashMap());
            maps.put(id, map);
        }


        return map;
    }

Examples of org.apache.commons.transaction.memory.TransactionalMapWrapper$TxContext

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