private DatastoreServiceConfig createDatastoreServiceConfigPrototype(
PersistenceConfiguration persistenceConfiguration, String... timeoutProps) {
DatastoreServiceConfig datastoreServiceConfig = DatastoreServiceConfig.Builder.withDefaults();
for (String timeoutProp : timeoutProps) {
int defaultDeadline = persistenceConfiguration.getIntProperty(timeoutProp);
if (defaultDeadline > 0) {
datastoreServiceConfig.deadline(defaultDeadline / 1000d);
}
}
String defaultReadConsistencyStr =
persistenceConfiguration.getStringProperty(DATASTORE_READ_CONSISTENCY_PROPERTY);
if (defaultReadConsistencyStr != null) {
try {
datastoreServiceConfig.readPolicy(
new ReadPolicy(Consistency.valueOf(defaultReadConsistencyStr)));
} catch (IllegalArgumentException iae) {
throw new NucleusFatalUserException(
"Illegal value for "
+ DATASTORE_READ_CONSISTENCY_PROPERTY
+ ". Valid values are "
+ Arrays.toString(Consistency.values()));
}
}
return datastoreServiceConfig;
}
/**
* Method to apply any restrictions to the created ResultSet.
*
* @param ps The PreparedStatement
* @param query The query
* @param applyTimeout Whether to apply the query timeout (if any) direct to the PreparedStatement
* @throws SQLException Thrown when an error occurs applying the constraints
*/
public static void prepareStatementForExecution(
PreparedStatement ps, Query query, boolean applyTimeout) throws SQLException {
NucleusContext nucleusCtx = query.getExecutionContext().getNucleusContext();
RDBMSStoreManager storeMgr = (RDBMSStoreManager) query.getStoreManager();
PersistenceConfiguration conf = nucleusCtx.getPersistenceConfiguration();
if (applyTimeout) {
Integer timeout = query.getDatastoreReadTimeoutMillis();
if (timeout != null && timeout > 0) {
ps.setQueryTimeout(timeout / 1000);
}
}
// Apply any fetch size
int fetchSize = 0;
if (query.getFetchPlan().getFetchSize() > 0) {
// FetchPlan has a size set so use that
fetchSize = query.getFetchPlan().getFetchSize();
}
if (storeMgr.getDatastoreAdapter().supportsQueryFetchSize(fetchSize)) {
ps.setFetchSize(fetchSize);
}
// Apply any fetch direction
String fetchDir =
conf.getStringProperty(RDBMSPropertyNames.PROPERTY_RDBMS_QUERY_FETCH_DIRECTION);
Object fetchDirExt =
query.getExtension(RDBMSPropertyNames.PROPERTY_RDBMS_QUERY_FETCH_DIRECTION);
if (fetchDirExt != null) {
fetchDir = (String) fetchDirExt;
if (!fetchDir.equals("forward")
&& !fetchDir.equals("reverse")
&& !fetchDir.equals("unknown")) {
throw new NucleusUserException(LOCALISER.msg("052512"));
}
}
if (fetchDir.equals("reverse")) {
ps.setFetchDirection(ResultSet.FETCH_REVERSE);
} else if (fetchDir.equals("unknown")) {
ps.setFetchDirection(ResultSet.FETCH_UNKNOWN);
}
// Add a limit on the number of rows to include the maximum we may need
long toExclNo = query.getRangeToExcl();
if (toExclNo != 0 && toExclNo != Long.MAX_VALUE) {
if (toExclNo > Integer.MAX_VALUE) {
// setMaxRows takes an int as input so limit to the correct range
ps.setMaxRows(Integer.MAX_VALUE);
} else {
ps.setMaxRows((int) toExclNo);
}
}
}