Examples of com.persistit.Exchange.fetch()

com.persistit.Exchange.fetch()
Fetches the value associated with the current Key into the Exchange's Value. The Value object reflects the fetched state. If there is no value associated with the key then {@link Value#isDefined} is false. Otherwise the value may beretrieved using {@link Value#get} and other methods of Value. @return This Exchange to permit method call chaining @throws PersistitException

    public String getOnlineDMLError(Session session) {
        OnlineSession onlineSession = getOnlineSession(session, true);
        Exchange ex = schemaTreeExchange(session);
        try {
            ex.clear().append(S_K_ONLINE).append(onlineSession.id).append(S_K_ERROR);
            ex.fetch();
            // write skew
            ex.lock();
            return ex.getValue().isDefined() ? ex.getValue().getString() : null;
        } catch(PersistitException | RollbackException e) {
            if(ex != null) {

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