Support DbLedgerStorage in LedgerCmd to get list of logger files for a given ledgerId

bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/BookieShell.java

@@ -44,6 +44,8 @@
 import org.apache.bookkeeper.bookie.Journal.JournalScanner;
 import org.apache.bookkeeper.bookie.storage.ldb.DbLedgerStorage;
 import org.apache.bookkeeper.bookie.storage.ldb.EntryLocationIndex;
+import org.apache.bookkeeper.bookie.storage.ldb.KeyValueStorageFactory.DbConfigType;
+import org.apache.bookkeeper.bookie.storage.ldb.KeyValueStorageRocksDB;
 import org.apache.bookkeeper.bookie.storage.ldb.LocationsIndexRebuildOp;
 import org.apache.bookkeeper.client.BKException;
 import org.apache.bookkeeper.client.BookKeeper;
@@ -390,12 +392,26 @@ public int runCmd(CommandLine cmdLine) throws Exception {
                 printUsage();
                 return -1;
             }
-            if (printMeta) {
-                // print meta
-                readLedgerMeta(ledgerId);
+
+            if (bkConf.getLedgerStorageClass().equals(DbLedgerStorage.class.getName())) {
+                // dump ledger info
+                try {
+                    DbLedgerStorage.readLedgerIndexEntries(ledgerId, bkConf,
+                            (currentEntry, entryLogId, position) -> System.out.println(
+                                    "entry " + currentEntry + "\t:\t(log: " + entryLogId + ", pos: " + position + ")"));
+                } catch (IOException e) {
+                    System.err.printf("ERROR: initializing dbLedgerStorage %s", e.getMessage());
+                    return -1;
+                }
+            } else {
+                if (printMeta) {
+                    // print meta
+                    readLedgerMeta(ledgerId);
+                }
+                // dump ledger info
+                readLedgerIndexEntries(ledgerId);
             }
-            // dump ledger info
-            readLedgerIndexEntries(ledgerId);
+
             return 0;
         }
 
@@ -2003,7 +2019,7 @@ protected void readLedgerMeta(long ledgerId) throws Exception {
     }
 
     /**
-     * Read ledger index entires
+     * Read ledger index entries
      *
      * @param ledgerId
      *          Ledger Id

bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/storage/ldb/DbLedgerStorage.java

@@ -1,6 +1,7 @@
 package org.apache.bookkeeper.bookie.storage.ldb;
 
 import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
 
 import java.io.IOException;
 import java.util.SortedMap;
@@ -24,10 +25,12 @@
 import org.apache.bookkeeper.bookie.LedgerDirsManager;
 import org.apache.bookkeeper.bookie.storage.ldb.DbLedgerStorageDataFormats.LedgerData;
 import org.apache.bookkeeper.bookie.storage.ldb.KeyValueStorage.Batch;
+import org.apache.bookkeeper.bookie.storage.ldb.KeyValueStorageFactory.DbConfigType;
 import org.apache.bookkeeper.conf.ServerConfiguration;
 import org.apache.bookkeeper.jmx.BKMBeanInfo;
 import org.apache.bookkeeper.proto.BookieProtocol;
 import org.apache.bookkeeper.stats.Gauge;
+import org.apache.bookkeeper.stats.NullStatsLogger;
 import org.apache.bookkeeper.stats.OpStatsLogger;
 import org.apache.bookkeeper.stats.StatsLogger;
 import org.apache.bookkeeper.util.MathUtils;
@@ -708,7 +711,6 @@ public long addLedgerToIndex(long ledgerId, boolean isFenced, byte[] masterKey,
 
         return numberOfEntries.get();
     }
-
     @Override
     public void registerLedgerDeletionListener(LedgerDeletionListener listener) {
         ledgerDeletionListeners.add(listener);
@@ -726,5 +728,46 @@ private void recordFailedEvent(OpStatsLogger logger, long startTimeNanos) {
         logger.registerFailedEvent(MathUtils.elapsedNanos(startTimeNanos), TimeUnit.NANOSECONDS);
     }
 
+    /**
+     * Reads ledger index entries to get list of entry-logger that contains given ledgerId
+     * 
+     * @param ledgerId
+     * @param serverConf
+     * @param processor
+     * @throws IOException
+     */
+    public static void readLedgerIndexEntries(long ledgerId, ServerConfiguration serverConf,
+            LedgerLoggerProcessor processor) throws IOException {
+
+        checkNotNull(serverConf, "ServerConfiguration can't be null");
+        checkNotNull(processor, "LedgerLoggger info processor can't null");
+
+        LedgerDirsManager ledgerDirsManager = new LedgerDirsManager(serverConf, serverConf.getLedgerDirs());
+        String ledgerBasePath = ledgerDirsManager.getAllLedgerDirs().get(0).toString();
+
+        EntryLocationIndex entryLocationIndex = new EntryLocationIndex(serverConf,
+                (path, dbConfigType, conf1) -> new KeyValueStorageRocksDB(path, DbConfigType.Small, conf1, true),
+                ledgerBasePath, NullStatsLogger.INSTANCE);
+        try {
+            long lastEntryId = entryLocationIndex.getLastEntryInLedger(ledgerId);
+            for (long currentEntry = 0; currentEntry <= lastEntryId; currentEntry++) {
+                long offset = entryLocationIndex.getLocation(ledgerId, currentEntry);
+                if (offset <= 0) {
+                    // entry not found in this bookie
+                    continue;
+                }
+                long entryLogId = offset >> 32L;
+                long position = offset & 0xffffffffL;
+                processor.process(currentEntry, entryLogId, position);
+            }
+        } finally {
+            entryLocationIndex.close();
+        }
+    }
+
+    public interface LedgerLoggerProcessor {
+        void process(long entryId, long entryLogId, long position);
+    }
+
     private static final Logger log = LoggerFactory.getLogger(DbLedgerStorage.class);
 }

bookkeeper-server/src/test/java/org/apache/bookkeeper/client/LedgerCmdTest.java

@@ -0,0 +1,96 @@
+/**
+ *
+ * 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
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+package org.apache.bookkeeper.client;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.apache.bookkeeper.bookie.BookieShell;
+import org.apache.bookkeeper.bookie.storage.ldb.DbLedgerStorage;
+import org.apache.bookkeeper.client.AsyncCallback.AddCallback;
+import org.apache.bookkeeper.client.BookKeeper.DigestType;
+import org.apache.bookkeeper.conf.ServerConfiguration;
+import org.apache.bookkeeper.test.BookKeeperClusterTestCase;
+import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import junit.framework.Assert;
+
+public class LedgerCmdTest extends BookKeeperClusterTestCase {
+
+    private final static Logger LOG = LoggerFactory.getLogger(LedgerCmdTest.class);
+    private DigestType digestType = DigestType.CRC32;
+    private static final String PASSWORD = "testPasswd";
+
+    public LedgerCmdTest() {
+        super(1);
+        baseConf.setLedgerStorageClass(DbLedgerStorage.class.getName());
+        baseConf.setGcWaitTime(60000);
+        baseConf.setFlushInterval(1);
+    }
+
+
+    /**
+     * list of entry logger files that contains given ledgerId
+     */
+    @Test
+    public void testLedgerDbStorageCmd() throws Exception {
+
+        BookKeeper bk = new BookKeeper(baseClientConf, zkc);
+        LOG.info("Create ledger and add entries to it");
+        LedgerHandle lh1 = createLedgerWithEntries(bk, 10);
+
+        String[] argv = new String[] { "ledger", Long.toString(lh1.getId()) };
+        final ServerConfiguration conf = bsConfs.get(0);
+        conf.setUseHostNameAsBookieID(true);
+
+        BookieShell bkShell = new BookieShell();
+        bkShell.setConf(conf);
+
+        Assert.assertEquals("Failed to return exit code!", 0, bkShell.run(argv));
+
+    }
+
+    private LedgerHandle createLedgerWithEntries(BookKeeper bk, int numOfEntries) throws Exception {
+        LedgerHandle lh = bk.createLedger(1, 1, digestType, PASSWORD.getBytes());
+        final AtomicInteger rc = new AtomicInteger(BKException.Code.OK);
+        final CountDownLatch latch = new CountDownLatch(numOfEntries);
+
+        final AddCallback cb = new AddCallback() {
+            public void addComplete(int rccb, LedgerHandle lh, long entryId, Object ctx) {
+                rc.compareAndSet(BKException.Code.OK, rccb);
+                latch.countDown();
+            }
+        };
+        for (int i = 0; i < numOfEntries; i++) {
+            lh.asyncAddEntry(("foobar" + i).getBytes(), cb, null);
+        }
+        if (!latch.await(30, TimeUnit.SECONDS)) {
+            throw new Exception("Entries took too long to add");
+        }
+        if (rc.get() != BKException.Code.OK) {
+            throw BKException.create(rc.get());
+        }
+        return lh;
+    }
+}