reddycharan commented on a change in pull request #1094: BP-27: New BookKeeper 

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+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+import com.beust.jcommander.Parameters;
+import java.util.List;
+import org.apache.bookkeeper.bookie.Journal;
+import org.apache.bookkeeper.bookie.LedgerDirsManager;
+import org.apache.bookkeeper.bookie.LogMark;
+import org.apache.bookkeeper.conf.ServerConfiguration;
+import org.apache.bookkeeper.util.DiskChecker;
+ * A bookie command to print the last log marker.
+ */
+@Parameters(commandDescription = "Print last log marker")
+public class LastMarkCommand extends BookieCommand {
 Review comment:
   Usage: bookie-shell [options] [command] [command options]
       -c, --conf
          Bookie Configuration File
       -h, --help
          Show this help message
          Default: false
       bookie      Commands on operating a single bookie
         Usage: bookie [options]
       client      Commands that interact with a cluster
         Usage: client [options]
       cluster      Commands that operate a cluster
         Usage: cluster [options]
       metadata      Commands that interact with metadata storage
         Usage: metadata [options]
   1) it is definitely not obvious for the first time users
   2) In the following line what does "bookie-shell" refer to? because when I 
tried "./bookkeeper-cli bookie-shell bookie" it doesn't output just "bookie" 
command  usage.
   Usage: bookie-shell [options] [command] [command options]
   3) in the existing shell we have couple of options for commands - 
ledgeridformat and entryformat. It seems it is missing in the new CLI
   4) I'm concerned about flexibility with jcommander framework for commands 
with complicated options like 'readlog' command - (readlog      [-msg] 
<entry_log_id | entry_log_file_name> [-ledgerid <ledgerid> [-entryid 
<entryid>]] [-startpos <startEntryLogBytePos> [-endpos <endEntryLogBytePos>]])

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