Method processResult

src/HBaseClient.java:4332–4411

(final int rc, final String path,
                                final Object ctx, final byte[] data,
                                final Stat stat)

      private byte found_meta;  // HBase 0.95 and up

      public void processResult(final int rc, final String path,
                                final Object ctx, final byte[] data,
                                final Stat stat) {
        final boolean is_root;  // True if ROOT znode, false if META znode.
        if (path.endsWith("/root-region-server")) {
          is_root = true;
        } else if (path.endsWith("/meta-region-server")) {
          is_root = false;
        } else {
          LOG.error("WTF? We got a callback from ZooKeeper for a znode we did"
                    + " not expect: " + path + " / stat: " + stat + " / data: "
                    + Bytes.pretty(data));
          retryGetRootRegionLater();
          return;
        }

        if (rc == Code.NONODE.intValue()) {
          final boolean both_znode_failed;
          if (is_root) {
            found_root = NOTFOUND;
            both_znode_failed = found_meta == NOTFOUND;
          } else {  // META (HBase 0.95 and up)
            found_meta = NOTFOUND;
            both_znode_failed = found_root == NOTFOUND;
          }
          if (both_znode_failed) {
            LOG.error("The znode for the -ROOT- region doesn't exist!");
            retryGetRootRegionLater();
          }
          return;
        } else if (rc != Code.OK.intValue()) {
          LOG.error("Looks like our ZK session expired or is broken, rc="
                    + rc + ": " + Code.get(rc));
          disconnectZK();
          connectZK();
          return;
        }
        if (data == null || data.length == 0 || data.length > Short.MAX_VALUE) {
          LOG.error("The location of the -ROOT- region in ZooKeeper is "
                    + (data == null || data.length == 0 ? "empty"
                       : "too large (" + data.length + " bytes!)"));
          retryGetRootRegionLater();
          return;  // TODO(tsuna): Add a watch to wait until the file changes.
        }

        final RegionClient client;
        if (is_root) {
          found_root = FOUND;
          client = handleRootZnode(data);
        } else {  // META (HBase 0.95 and up)
          found_meta = FOUND;
          client = handleMetaZnode(data);
        }

        if (client == null) {         // We failed to get a client.
          retryGetRootRegionLater();  // So retry later.
          return;
        }