lmdbjava
diff --git a/‎src/main/java/org/lmdbjava/Env.java‎
Lines changed: 24 additions & 0 deletions b/‎src/main/java/org/lmdbjava/Env.java‎
Lines changed: 24 additions & 0 deletions
diff --git a/‎src/test/java/org/lmdbjava/CursorParamTest.java‎
Lines changed: 4 additions & 0 deletions b/‎src/test/java/org/lmdbjava/CursorParamTest.java‎
Lines changed: 4 additions & 0 deletions
diff --git a/‎src/test/java/org/lmdbjava/DbiTest.java‎
Lines changed: 19 additions & 0 deletions b/‎src/test/java/org/lmdbjava/DbiTest.java‎
Lines changed: 19 additions & 0 deletions
@@ -24,6 +24,8 @@
 import static java.lang.Boolean.getBoolean;
 import java.nio.ByteBuffer;
 import static java.nio.charset.StandardCharsets.UTF_8;
+import java.util.ArrayList;
+import java.util.List;
 import static java.util.Objects.requireNonNull;
 import jnr.ffi.Pointer;
 import jnr.ffi.byref.PointerByReference;
@@ -155,6 +157,28 @@ public void copy(final File path, final CopyFlags... flags) {
     checkRc(LIB.mdb_env_copy2(ptr, path.getAbsolutePath(), flagsMask));
   }
 
+  /**
+   * Obtain the DBI names.
+   *
+   * @return a list of DBI names or null if none were found
+   */
+  public List<byte[]> getDbiNames() {
+    final List<byte[]> result = new ArrayList<>();
+    final Dbi<T> names = openDbi((byte[]) null);
+    try (Txn<T> txn = txnRead();
+         Cursor<T> cursor = names.openCursor(txn)) {
+      if (!cursor.first()) {
+        return null;
+      }
+      do {
+        final byte[] name = proxy.getBytes(cursor.key());
+        result.add(name);
+      } while (cursor.next());
+    }
+
+    return result;
+  }
+
   /**
    * Get the maximum size of keys and MDB_DUPSORT data we can write.
    *
 
@@ -26,9 +26,11 @@
 import java.io.IOException;
 import static java.lang.Long.BYTES;
 import java.nio.ByteBuffer;
+import static java.nio.charset.StandardCharsets.UTF_8;
 import org.agrona.DirectBuffer;
 import org.agrona.MutableDirectBuffer;
 import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.nullValue;
 import static org.hamcrest.MatcherAssert.assertThat;
 import org.junit.Rule;
 import org.junit.Test;
@@ -106,7 +108,9 @@ protected AbstractBufferRunner(final BufferProxy<T> proxy) {
     @Override
     public final void execute(final TemporaryFolder tmp) {
       try (Env<T> env = env(tmp)) {
+        assertThat(env.getDbiNames(), nullValue());
         final Dbi<T> db = env.openDbi(DB_1, MDB_CREATE, MDB_DUPSORT);
+        assertThat(env.getDbiNames().get(0), is(DB_1.getBytes(UTF_8)));
         try (Txn<T> txn = env.txnWrite()) {
           // populate data
           final Cursor<T> c = db.openCursor(txn);
 
@@ -29,6 +29,7 @@
 import static java.nio.ByteBuffer.allocateDirect;
 import static java.nio.charset.StandardCharsets.UTF_8;
 import static java.util.Collections.nCopies;
+import java.util.List;
 import java.util.Random;
 import org.agrona.concurrent.UnsafeBuffer;
 import static org.hamcrest.CoreMatchers.is;
@@ -121,6 +122,24 @@ public void getName() {
     assertThat(db.getName(), is(DB_1.getBytes(UTF_8)));
   }
 
+  @Test
+  public void getNamesWhenDbisPresent() {
+    final byte[] dbHello = new byte[]{'h', 'e', 'l', 'l', 'o'};
+    final byte[] dbWorld = new byte[]{'w', 'o', 'r', 'l', 'd'};
+    env.openDbi(dbHello, MDB_CREATE);
+    env.openDbi(dbWorld, MDB_CREATE);
+    final List<byte[]> dbiNames = env.getDbiNames();
+    assertThat(dbiNames.size(), is(2));
+    assertThat(dbiNames.get(0), is(dbHello));
+    assertThat(dbiNames.get(1), is(dbWorld));
+  }
+
+  @Test
+  public void getNamesWhenEmpty() {
+    final List<byte[]> dbiNames = env.getDbiNames();
+    assertThat(dbiNames, nullValue());
+  }
+
   @Test
   public void putAbortGet() {
     final Dbi<ByteBuffer> db = env.openDbi(DB_1, MDB_CREATE);