Examples with ConcurrentEntityModificationException org.qi4j.api.unitofwork.ConcurrentEntityModificationException used on opensource projects

Example 16 with ConcurrentEntityModificationException

use of org.qi4j.api.unitofwork.ConcurrentEntityModificationException in project qi4j-sdk by Qi4j.

the class PersistedSequencingMixin method newSequenceValue.

@Override
public Long newSequenceValue() throws SequencingException {
    synchronized (this) {
        ConcurrentEntityModificationException exc = null;
        UnitOfWork uow = uowf.newUnitOfWork();
        try {
            for (int i = 0; i < 3; i++) {
                try {
                    Property<Long> property = sequence.get().currentValue();
                    long value = property.get();
                    value = value + 1;
                    property.set(value);
                    uow.complete();
                    return value;
                } catch (ConcurrentEntityModificationException e) {
                    // Ignore;
                    exc = e;
                }
            }
            throw new SequencingException("Unable to update sequence value.", exc);
        } catch (UnitOfWorkCompletionException e) {
            throw new SequencingException("Unable to update sequence value.", exc);
        }
    }
}