/** @return True if the CAS was successful, false if not */
@Override
public Deferred<Boolean> call(final TreeRule fetched_rule) {
TreeRule stored_rule = fetched_rule;
final byte[] original_rule =
stored_rule == null ? new byte[0] : JSON.serializeToBytes(stored_rule);
if (stored_rule == null) {
stored_rule = local_rule;
} else {
if (!stored_rule.copyChanges(local_rule, overwrite)) {
LOG.debug(this + " does not have changes, skipping sync to storage");
throw new IllegalStateException("No changes detected in the rule");
}
}
// reset the local change map so we don't keep writing on subsequent
// requests
initializeChangedMap();
// validate before storing
stored_rule.validateRule();
final PutRequest put =
new PutRequest(
tsdb.treeTable(),
Tree.idToBytes(tree_id),
Tree.TREE_FAMILY(),
getQualifier(level, order),
JSON.serializeToBytes(stored_rule));
return tsdb.getClient().compareAndSet(put, original_rule);
}
/**
* Parses a rule from the given column. Used by the Tree class when scanning a row for rules.
*
* @param column The column to parse
* @return A valid TreeRule object if parsed successfully
* @throws IllegalArgumentException if the column was empty
* @throws JSONException if the object could not be serialized
*/
public static TreeRule parseFromStorage(final KeyValue column) {
if (column.value() == null) {
throw new IllegalArgumentException("Tree rule column value was null");
}
final TreeRule rule = JSON.parseToObject(column.value(), TreeRule.class);
rule.initializeChangedMap();
return rule;
}