In chapter 7's queryHintsExample
The second parameter of setHint needs to be modified into:
With ObjectLevelReadQuery.DoNotCheckCache, I got an error:
Caused by: java.lang.IllegalArgumentException: Query SELECT e FROM Employee e WHERE e.id = ?1, query hint eclipselink.cache-usage has illegal value 0.
at org.eclipse.persistence.internal.jpa.QueryHintsHandler$Hint.apply(QueryHintsHandler.java:362)
at org.eclipse.persistence.internal.jpa.QueryHintsHandler$Hint.apply(QueryHintsHandler.java:345) ...