@SuppressWarnings("unchecked") private static <T extends Enum<T>> OperationStatistic<T> findStat(Cache<?, ?> cache, final String statName, final String tag) { Query q = queryBuilder().chain(self()) .descendants().filter(context(identifier(subclassOf(OperationStatistic.class)))).build(); Set<TreeNode> operationStatisticNodes = q.execute(Collections.singleton(ContextManager.nodeFor(cache))); Set<TreeNode> result = queryBuilder() .filter( context(attributes(Matchers.<Map<String, Object>>allOf( hasAttribute("name", statName), hasAttribute("tags", new Matcher<Set<String>>() { @Override protected boolean matchesSafely(Set<String> object) { return object.contains(tag); } }))))).build().execute(operationStatisticNodes); switch (result.size()) { case 0: return null; case 1: { TreeNode node = result.iterator().next(); return (OperationStatistic<T>) node.getContext().attributes().get("this"); } default: throw new RuntimeException("query for unique stat '" + statName + "' with tag '" + tag + "' failed; found " + result.size() + " instance(s)"); } }
public static ValueStatistic findValueStat(Cache<?, ?> cache1, final String statName, final String tag) { Query q = queryBuilder().chain(self()) .descendants().filter(context(identifier(subclassOf(ValueStatistic.class)))).build(); Set<TreeNode> nodes = q.execute(Collections.singleton(ContextManager.nodeFor(cache1))); Set<TreeNode> result = queryBuilder() .filter( context(attributes(Matchers.<Map<String, Object>>allOf( hasAttribute("name", statName), hasAttribute("tags", new Matcher<Set<String>>() { @Override protected boolean matchesSafely(Set<String> object) { return object.contains(tag); } }))))).build().execute(nodes); if (result.size() != 1) { throw new RuntimeException("single stat not found; found " + result.size()); } TreeNode node = result.iterator().next(); return (ValueStatistic) node.getContext().attributes().get("this"); }