Github user hanm commented on a diff in the pull request:
https://github.com/apache/zookeeper/pull/179#discussion_r101877413
--- Diff:
src/java/main/org/apache/zookeeper/server/command/FourLetterCommands.java ---
@@ -153,11 +159,69 @@
*/
public final static int telnetCloseCmd = 0xfff4fffd;
- final static HashMap<Integer, String> cmd2String =
- new HashMap<Integer, String>();
+ private static final String ZOOKEEPER_4LW_COMMANDS_WHITELIST =
"zookeeper.4lw.commands.whitelist";
+
+ private static final Logger LOG =
LoggerFactory.getLogger(FourLetterCommands.class);
+
+ private static final Map<Integer, String> cmd2String = new
HashMap<Integer, String>();
+
+ private static final Set<String> whiteListedCommands = new
HashSet<String>();
+
+ private static boolean whiteListInitialized = false;
+
+ // @VisibleForTesting
+ public static void resetWhiteList() {
+ whiteListInitialized = false;
+ whiteListedCommands.clear();
+ }
+
+ /**
+ * Return the string representation of the specified command code.
+ */
+ public static String getCommandString(int command) {
+ return cmd2String.get(command);
+ }
+
+ /**
+ * Check if the specified command code is from a known command.
+ *
+ * @param command The integer code of command.
+ * @return true if the specified command is known, false otherwise.
+ */
+ public static boolean isKnown(int command) {
+ return cmd2String.containsKey(command);
+ }
- public static Map<Integer, String> getCmdMapView() {
--- End diff --
While I am on this, this legacy method can be optimized as a boolean query
instead of returning a collection, so did the change for this as well (in
addition to the white list collection.).
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