[OPENJPA-2697] QueryCache doesn't work when use external cache storages

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.2.0, 2.2.2, 2.3.0, 2.4.0, 2.4.1, 2.4.2
• Component/s: datacache
• Assignee: Unassigned
• Reporter: Zane Zhang
• Created: 19/Apr/17 07:53
• Updated: 19/Apr/17 07:53

Description

When query object is de-serialized from external cache storage, it report error when de-serialized QueryKey. Check following code in QueryKey (2.2.0). _query is assumed to be String in readExternal(), but _query is not always String object.

private static QueryKey createKey(QueryContext q, boolean packed,
Class<?> candidateClass, boolean subclasses, long startIdx, long endIdx, Object parsed) {
...
key._query = q.getQueryString();
if (key._query == null)

{ // this can be a criteria query key._query = parsed; }

}
public void readExternal(ObjectInput in)
throws IOException, ClassNotFoundException

{ _candidateClassName = (String) in.readObject(); _subclasses = in.readBoolean(); _accessPathClassNames = (Set<String>) in.readObject(); _query = (String) in.readObject(); _ignoreChanges = in.readBoolean(); _params = (Map<Object,Object>) in.readObject(); _rangeStart = in.readLong(); _rangeEnd = in.readLong (); _timeout = in.readInt (); }