diff --git a/src/main/java/org/redisson/CommandExecutor.java b/src/main/java/org/redisson/CommandExecutor.java
index 67bf29af0..a0c0da0af 100644
--- a/src/main/java/org/redisson/CommandExecutor.java
+++ b/src/main/java/org/redisson/CommandExecutor.java
@@ -33,6 +33,8 @@ import io.netty.util.concurrent.Future;
 //TODO ping support
 public interface CommandExecutor {
 
+    <T, R> R read(RedisClient client, String key, Codec codec, RedisCommand<T> command, Object ... params);
+
     <T, R> R read(RedisClient client, String key, RedisCommand<T> command, Object ... params);
 
     <T, R> Future<R> evalWriteAllAsync(RedisCommand<T> command, SlotCallback<T, R> callback, String script, List<Object> keys, Object ... params);
diff --git a/src/main/java/org/redisson/CommandExecutorService.java b/src/main/java/org/redisson/CommandExecutorService.java
index d0929561f..85a0649e8 100644
--- a/src/main/java/org/redisson/CommandExecutorService.java
+++ b/src/main/java/org/redisson/CommandExecutorService.java
@@ -201,6 +201,12 @@ public class CommandExecutorService implements CommandExecutor {
         return get(res);
     }
 
+    public <T, R> R read(RedisClient client, String key, Codec codec, RedisCommand<T> command, Object ... params) {
+        Future<R> res = readAsync(client, key, codec, command, params);
+        return get(res);
+    }
+
+
     public <T, R> Future<R> readAsync(RedisClient client, String key, Codec codec, RedisCommand<T> command, Object ... params) {
         Promise<R> mainPromise = connectionManager.newPromise();
         int slot = connectionManager.calcSlot(key);
diff --git a/src/main/java/org/redisson/Redisson.java b/src/main/java/org/redisson/Redisson.java
index 7b78ac885..f97686a69 100755
--- a/src/main/java/org/redisson/Redisson.java
+++ b/src/main/java/org/redisson/Redisson.java
@@ -39,6 +39,7 @@ import org.redisson.core.RCountDownLatch;
 import org.redisson.core.RDeque;
 import org.redisson.core.RHyperLogLog;
 import org.redisson.core.RKeys;
+import org.redisson.core.RLexSortedSet;
 import org.redisson.core.RList;
 import org.redisson.core.RLock;
 import org.redisson.core.RMap;
@@ -221,6 +222,10 @@ public class Redisson implements RedissonClient {
         return new RedissonScoredSortedSet<V>(commandExecutor, name);
     }
 
+    public RLexSortedSet getLexSortedSet(String name) {
+        return new RedissonLexSortedSet(commandExecutor, name);
+    }
+
     /**
      * Returns topic instance by name.
      *
diff --git a/src/main/java/org/redisson/RedissonClient.java b/src/main/java/org/redisson/RedissonClient.java
index 3c3290d77..c8149529a 100755
--- a/src/main/java/org/redisson/RedissonClient.java
+++ b/src/main/java/org/redisson/RedissonClient.java
@@ -29,11 +29,13 @@ import org.redisson.core.RCountDownLatch;
 import org.redisson.core.RDeque;
 import org.redisson.core.RHyperLogLog;
 import org.redisson.core.RKeys;
+import org.redisson.core.RLexSortedSet;
 import org.redisson.core.RList;
 import org.redisson.core.RLock;
 import org.redisson.core.RMap;
 import org.redisson.core.RPatternTopic;
 import org.redisson.core.RQueue;
+import org.redisson.core.RScoredSortedSet;
 import org.redisson.core.RScript;
 import org.redisson.core.RSet;
 import org.redisson.core.RSortedSet;
@@ -104,6 +106,10 @@ public interface RedissonClient {
      */
     <V> RSortedSet<V> getSortedSet(String name);
 
+    <V> RScoredSortedSet<V> getScoredSortedSet(String name);
+
+    RLexSortedSet getLexSortedSet(String name);
+
     /**
      * Returns topic instance by name.
      *
diff --git a/src/main/java/org/redisson/RedissonExpirable.java b/src/main/java/org/redisson/RedissonExpirable.java
index 90b0ea801..d24a43649 100644
--- a/src/main/java/org/redisson/RedissonExpirable.java
+++ b/src/main/java/org/redisson/RedissonExpirable.java
@@ -18,6 +18,7 @@ package org.redisson;
 import java.util.Date;
 import java.util.concurrent.TimeUnit;
 
+import org.redisson.client.codec.Codec;
 import org.redisson.client.codec.StringCodec;
 import org.redisson.client.protocol.RedisCommands;
 import org.redisson.core.RExpirable;
@@ -30,6 +31,10 @@ abstract class RedissonExpirable extends RedissonObject implements RExpirable {
         super(connectionManager, name);
     }
 
+    RedissonExpirable(Codec codec, CommandExecutor connectionManager, String name) {
+        super(codec, connectionManager, name);
+    }
+
     @Override
     public boolean expire(long timeToLive, TimeUnit timeUnit) {
         return commandExecutor.get(expireAsync(timeToLive, timeUnit));
diff --git a/src/main/java/org/redisson/RedissonLexSortedSet.java b/src/main/java/org/redisson/RedissonLexSortedSet.java
new file mode 100644
index 000000000..bfed02e91
--- /dev/null
+++ b/src/main/java/org/redisson/RedissonLexSortedSet.java
@@ -0,0 +1,142 @@
+/**
+ * Copyright 2014 Nikita Koksharov, Nickolay Borbit
+ *
+ * Licensed 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.redisson;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import org.redisson.client.codec.StringCodec;
+import org.redisson.client.protocol.RedisCommands;
+import org.redisson.core.RLexSortedSet;
+
+import io.netty.util.concurrent.Future;
+
+public class RedissonLexSortedSet extends RedissonScoredSortedSet<String> implements RLexSortedSet {
+
+    public RedissonLexSortedSet(CommandExecutor commandExecutor, String name) {
+        super(StringCodec.INSTANCE, commandExecutor, name);
+    }
+
+    @Override
+    public Collection<String> lexRange(String fromElement, boolean fromInclusive, String toElement, boolean toInclusive) {
+        return get(lexRangeAsync(fromElement, fromInclusive, toElement, toInclusive));
+    }
+
+    @Override
+    public Collection<String> lexRangeHead(String toElement, boolean toInclusive) {
+        return get(lexRangeHeadAsync(toElement, toInclusive));
+    }
+
+    @Override
+    public Future<Collection<String>> lexRangeHeadAsync(String toElement, boolean toInclusive) {
+        String toValue = value(toElement, toInclusive);
+        return commandExecutor.readAsync(getName(), StringCodec.INSTANCE, RedisCommands.ZRANGEBYLEX, getName(), "-", toValue);
+    }
+
+    @Override
+    public Collection<String> lexRangeTail(String fromElement, boolean fromInclusive) {
+        return get(lexRangeTailAsync(fromElement, fromInclusive));
+    }
+
+    @Override
+    public Future<Collection<String>> lexRangeTailAsync(String fromElement, boolean fromInclusive) {
+        String fromValue = value(fromElement, fromInclusive);
+        return commandExecutor.readAsync(getName(), StringCodec.INSTANCE, RedisCommands.ZRANGEBYLEX, getName(), fromValue, "+");
+    }
+
+
+    @Override
+    public Future<Collection<String>> lexRangeAsync(String fromElement, boolean fromInclusive, String toElement, boolean toInclusive) {
+        String fromValue = value(fromElement, fromInclusive);
+        String toValue = value(toElement, toInclusive);
+
+        return commandExecutor.readAsync(getName(), StringCodec.INSTANCE, RedisCommands.ZRANGEBYLEX, getName(), fromValue, toValue);
+    }
+
+    @Override
+    public Integer lexCountTail(String fromElement, boolean fromInclusive) {
+        return get(lexCountTailAsync(fromElement, fromInclusive));
+    }
+
+    @Override
+    public Future<Integer> lexCountTailAsync(String fromElement, boolean fromInclusive) {
+        String fromValue = value(fromElement, fromInclusive);
+
+        return commandExecutor.readAsync(getName(), RedisCommands.ZLEXCOUNT, getName(), fromValue, "+");
+    }
+
+    @Override
+    public Integer lexCountHead(String toElement, boolean toInclusive) {
+        return get(lexCountHeadAsync(toElement, toInclusive));
+    }
+
+    @Override
+    public Future<Integer> lexCountHeadAsync(String toElement, boolean toInclusive) {
+        String toValue = value(toElement, toInclusive);
+
+        return commandExecutor.readAsync(getName(), RedisCommands.ZLEXCOUNT, getName(), "-", toValue);
+    }
+
+    @Override
+    public Integer lexCount(String fromElement, boolean fromInclusive, String toElement, boolean toInclusive) {
+        return get(lexCountAsync(fromElement, fromInclusive, toElement, toInclusive));
+    }
+
+    @Override
+    public Future<Integer> lexCountAsync(String fromElement, boolean fromInclusive, String toElement, boolean toInclusive) {
+        String fromValue = value(fromElement, fromInclusive);
+        String toValue = value(toElement, toInclusive);
+
+        return commandExecutor.readAsync(getName(), RedisCommands.ZLEXCOUNT, getName(), fromValue, toValue);
+    }
+
+    private String value(String fromElement, boolean fromInclusive) {
+        String fromValue = fromElement.toString();
+        if (fromInclusive) {
+            fromValue = "[" + fromValue;
+        } else {
+            fromValue = "(" + fromValue;
+        }
+        return fromValue;
+    }
+
+    @Override
+    public Future<Boolean> addAsync(String e) {
+        return addAsync(0, e);
+    }
+
+    @Override
+    public Future<Boolean> addAllAsync(Collection<? extends String> c) {
+        List<Object> params = new ArrayList<Object>(2*c.size());
+        for (Object param : c) {
+            params.add(0);
+            params.add(param);
+        }
+        return commandExecutor.writeAsync(getName(), codec, RedisCommands.ZADD, getName(), params.toArray());
+    }
+
+    @Override
+    public boolean add(String e) {
+        return get(addAsync(e));
+    }
+
+    @Override
+    public boolean addAll(Collection<? extends String> c) {
+        return get(addAllAsync(c));
+    }
+
+}
diff --git a/src/main/java/org/redisson/RedissonList.java b/src/main/java/org/redisson/RedissonList.java
index ab9385920..f4cd946c1 100644
--- a/src/main/java/org/redisson/RedissonList.java
+++ b/src/main/java/org/redisson/RedissonList.java
@@ -92,8 +92,7 @@ public class RedissonList<V> extends RedissonExpirable implements RList<V> {
         return (List<V>) get(readAllAsync());
     }
 
-    @Override
-    public Future<Collection<V>> readAllAsync() {
+    private Future<Collection<V>> readAllAsync() {
         return commandExecutor.readAsync(getName(), LRANGE, getName(), 0, -1);
     }
 
diff --git a/src/main/java/org/redisson/RedissonObject.java b/src/main/java/org/redisson/RedissonObject.java
index 23990c00e..bd661c1e1 100644
--- a/src/main/java/org/redisson/RedissonObject.java
+++ b/src/main/java/org/redisson/RedissonObject.java
@@ -15,6 +15,7 @@
  */
 package org.redisson;
 
+import org.redisson.client.codec.Codec;
 import org.redisson.client.protocol.RedisCommands;
 import org.redisson.core.RObject;
 
@@ -31,10 +32,16 @@ abstract class RedissonObject implements RObject {
 
     final CommandExecutor commandExecutor;
     private final String name;
+    final Codec codec;
 
-    public RedissonObject(CommandExecutor commandExecutor, String name) {
-        this.commandExecutor = commandExecutor;
+    public RedissonObject(Codec codec, CommandExecutor commandExecutor, String name) {
+        this.codec = codec;
         this.name = name;
+        this.commandExecutor = commandExecutor;
+    }
+
+    public RedissonObject(CommandExecutor commandExecutor, String name) {
+        this(commandExecutor.getConnectionManager().getCodec(), commandExecutor, name);
     }
 
     protected <V> V get(Future<V> future) {
diff --git a/src/main/java/org/redisson/RedissonScoredSortedSet.java b/src/main/java/org/redisson/RedissonScoredSortedSet.java
index 106d4e16c..fbafd7478 100644
--- a/src/main/java/org/redisson/RedissonScoredSortedSet.java
+++ b/src/main/java/org/redisson/RedissonScoredSortedSet.java
@@ -23,6 +23,7 @@ import java.util.List;
 import java.util.NoSuchElementException;
 
 import org.redisson.client.RedisClient;
+import org.redisson.client.codec.Codec;
 import org.redisson.client.codec.StringCodec;
 import org.redisson.client.protocol.RedisCommand;
 import org.redisson.client.protocol.RedisCommands;
@@ -39,6 +40,10 @@ public class RedissonScoredSortedSet<V> extends RedissonExpirable implements RSc
         super(commandExecutor, name);
     }
 
+    public RedissonScoredSortedSet(Codec codec, CommandExecutor commandExecutor, String name) {
+        super(codec, commandExecutor, name);
+    }
+
     @Override
     public boolean add(double score, V object) {
         return get(addAsync(score, object));
@@ -46,11 +51,7 @@ public class RedissonScoredSortedSet<V> extends RedissonExpirable implements RSc
 
     @Override
     public Future<Boolean> addAsync(double score, V object) {
-        // String should be encoded as String to let lex functions work properly
-        if (object instanceof String) {
-            return commandExecutor.writeAsync(getName(), StringCodec.INSTANCE, RedisCommands.ZADD, getName(), BigDecimal.valueOf(score).toPlainString(), object);
-        }
-        return commandExecutor.writeAsync(getName(), RedisCommands.ZADD, getName(), BigDecimal.valueOf(score).toPlainString(), object);
+        return commandExecutor.writeAsync(getName(), codec, RedisCommands.ZADD, getName(), BigDecimal.valueOf(score).toPlainString(), object);
     }
 
     @Override
@@ -65,7 +66,7 @@ public class RedissonScoredSortedSet<V> extends RedissonExpirable implements RSc
 
     @Override
     public Future<Boolean> removeAsync(Object object) {
-        return commandExecutor.writeAsync(getName(), RedisCommands.ZREM, getName(), object);
+        return commandExecutor.writeAsync(getName(), codec, RedisCommands.ZREM, getName(), object);
     }
 
     @Override
@@ -80,7 +81,7 @@ public class RedissonScoredSortedSet<V> extends RedissonExpirable implements RSc
 
     @Override
     public Future<Integer> sizeAsync() {
-        return commandExecutor.readAsync(getName(), RedisCommands.ZCARD, getName());
+        return commandExecutor.readAsync(getName(), codec, RedisCommands.ZCARD, getName());
     }
 
     @Override
@@ -90,7 +91,7 @@ public class RedissonScoredSortedSet<V> extends RedissonExpirable implements RSc
 
     @Override
     public Future<Boolean> containsAsync(Object o) {
-        return commandExecutor.readAsync(getName(), RedisCommands.ZSCORE_CONTAINS, getName(), o);
+        return commandExecutor.readAsync(getName(), codec, RedisCommands.ZSCORE_CONTAINS, getName(), o);
     }
 
     @Override
@@ -100,7 +101,7 @@ public class RedissonScoredSortedSet<V> extends RedissonExpirable implements RSc
 
     @Override
     public Future<Double> getScoreAsync(V o) {
-        return commandExecutor.readAsync(getName(), RedisCommands.ZSCORE, getName(), o);
+        return commandExecutor.readAsync(getName(), codec, RedisCommands.ZSCORE, getName(), o);
     }
 
     @Override
@@ -110,11 +111,11 @@ public class RedissonScoredSortedSet<V> extends RedissonExpirable implements RSc
 
     @Override
     public Future<Integer> rankAsync(V o) {
-        return commandExecutor.readAsync(getName(), RedisCommands.ZRANK, getName(), o);
+        return commandExecutor.readAsync(getName(), codec, RedisCommands.ZRANK, getName(), o);
     }
 
     private ListScanResult<V> scanIterator(RedisClient client, long startPos) {
-        return commandExecutor.read(client, getName(), RedisCommands.ZSCAN, getName(), startPos);
+        return commandExecutor.read(client, getName(), codec, RedisCommands.ZSCAN, getName(), startPos);
     }
 
     @Override
@@ -187,7 +188,7 @@ public class RedissonScoredSortedSet<V> extends RedissonExpirable implements RSc
 
     @Override
     public Future<Boolean> containsAllAsync(Collection<?> c) {
-        return commandExecutor.evalReadAsync(getName(), new RedisCommand<Boolean>("EVAL", new BooleanReplayConvertor(), 4),
+        return commandExecutor.evalReadAsync(getName(), codec, new RedisCommand<Boolean>("EVAL", new BooleanReplayConvertor(), 4),
                 "local s = redis.call('zrange', KEYS[1], 0, -1);" +
                         "for i = 0, table.getn(s), 1 do " +
                             "for j = 0, table.getn(ARGV), 1 do "
@@ -201,7 +202,7 @@ public class RedissonScoredSortedSet<V> extends RedissonExpirable implements RSc
 
     @Override
     public Future<Boolean> removeAllAsync(Collection<?> c) {
-        return commandExecutor.evalWriteAsync(getName(), new RedisCommand<Boolean>("EVAL", new BooleanReplayConvertor(), 4),
+        return commandExecutor.evalWriteAsync(getName(), codec, new RedisCommand<Boolean>("EVAL", new BooleanReplayConvertor(), 4),
                         "local v = false " +
                         "for i = 0, table.getn(ARGV), 1 do "
                             + "if redis.call('zrem', KEYS[1], ARGV[i]) == 1 "
@@ -223,7 +224,7 @@ public class RedissonScoredSortedSet<V> extends RedissonExpirable implements RSc
 
     @Override
     public Future<Boolean> retainAllAsync(Collection<?> c) {
-        return commandExecutor.evalWriteAsync(getName(), new RedisCommand<Boolean>("EVAL", new BooleanReplayConvertor(), 4),
+        return commandExecutor.evalWriteAsync(getName(), codec, new RedisCommand<Boolean>("EVAL", new BooleanReplayConvertor(), 4),
                     "local changed = false " +
                     "local s = redis.call('zrange', KEYS[1], 0, -1) "
                        + "local i = 0 "
@@ -264,7 +265,7 @@ public class RedissonScoredSortedSet<V> extends RedissonExpirable implements RSc
 
     @Override
     public Future<Collection<V>> valueRangeAsync(int startIndex, int endIndex) {
-        return commandExecutor.readAsync(getName(), RedisCommands.ZRANGE, getName(), startIndex, endIndex);
+        return commandExecutor.readAsync(getName(), codec, RedisCommands.ZRANGE, getName(), startIndex, endIndex);
     }
 
     @Override
@@ -274,90 +275,7 @@ public class RedissonScoredSortedSet<V> extends RedissonExpirable implements RSc
 
     @Override
     public Future<Collection<ScoredEntry<V>>> entryRangeAsync(int startIndex, int endIndex) {
-        return commandExecutor.readAsync(getName(), RedisCommands.ZRANGE_ENTRY, getName(), startIndex, endIndex, "WITHSCORES");
-    }
-
-    @Override
-    public Collection<V> lexRange(V fromElement, boolean fromInclusive, V toElement, boolean toInclusive) {
-        return get(lexRangeAsync(fromElement, fromInclusive, toElement, toInclusive));
-    }
-
-    @Override
-    public Collection<V> lexRangeHead(V toElement, boolean toInclusive) {
-        return get(lexRangeHeadAsync(toElement, toInclusive));
-    }
-
-    @Override
-    public Future<Collection<V>> lexRangeHeadAsync(V toElement, boolean toInclusive) {
-        String toValue = value(toElement, toInclusive);
-        return commandExecutor.readAsync(getName(), StringCodec.INSTANCE, RedisCommands.ZRANGEBYLEX, getName(), "-", toValue);
-    }
-
-    @Override
-    public Collection<V> lexRangeTail(V fromElement, boolean fromInclusive) {
-        return get(lexRangeTailAsync(fromElement, fromInclusive));
-    }
-
-    @Override
-    public Future<Collection<V>> lexRangeTailAsync(V fromElement, boolean fromInclusive) {
-        String fromValue = value(fromElement, fromInclusive);
-        return commandExecutor.readAsync(getName(), StringCodec.INSTANCE, RedisCommands.ZRANGEBYLEX, getName(), fromValue, "+");
-    }
-
-
-    @Override
-    public Future<Collection<V>> lexRangeAsync(V fromElement, boolean fromInclusive, V toElement, boolean toInclusive) {
-        String fromValue = value(fromElement, fromInclusive);
-        String toValue = value(toElement, toInclusive);
-
-        return commandExecutor.readAsync(getName(), StringCodec.INSTANCE, RedisCommands.ZRANGEBYLEX, getName(), fromValue, toValue);
-    }
-
-    @Override
-    public Integer lexCountTail(V fromElement, boolean fromInclusive) {
-        return get(lexCountTailAsync(fromElement, fromInclusive));
-    }
-
-    @Override
-    public Future<Integer> lexCountTailAsync(V fromElement, boolean fromInclusive) {
-        String fromValue = value(fromElement, fromInclusive);
-
-        return commandExecutor.readAsync(getName(), RedisCommands.ZLEXCOUNT, getName(), fromValue, "+");
-    }
-
-    @Override
-    public Integer lexCountHead(V toElement, boolean toInclusive) {
-        return get(lexCountHeadAsync(toElement, toInclusive));
-    }
-
-    @Override
-    public Future<Integer> lexCountHeadAsync(V toElement, boolean toInclusive) {
-        String toValue = value(toElement, toInclusive);
-
-        return commandExecutor.readAsync(getName(), RedisCommands.ZLEXCOUNT, getName(), "-", toValue);
-    }
-
-    @Override
-    public Integer lexCount(V fromElement, boolean fromInclusive, V toElement, boolean toInclusive) {
-        return get(lexCountAsync(fromElement, fromInclusive, toElement, toInclusive));
-    }
-
-    @Override
-    public Future<Integer> lexCountAsync(V fromElement, boolean fromInclusive, V toElement, boolean toInclusive) {
-        String fromValue = value(fromElement, fromInclusive);
-        String toValue = value(toElement, toInclusive);
-
-        return commandExecutor.readAsync(getName(), RedisCommands.ZLEXCOUNT, getName(), fromValue, toValue);
-    }
-
-    private String value(V fromElement, boolean fromInclusive) {
-        String fromValue = fromElement.toString();
-        if (fromInclusive) {
-            fromValue = "[" + fromValue;
-        } else {
-            fromValue = "(" + fromValue;
-        }
-        return fromValue;
+        return commandExecutor.readAsync(getName(), codec, RedisCommands.ZRANGE_ENTRY, getName(), startIndex, endIndex, "WITHSCORES");
     }
 
 }
diff --git a/src/main/java/org/redisson/RedissonSet.java b/src/main/java/org/redisson/RedissonSet.java
index 6e2a94400..7a38567e0 100644
--- a/src/main/java/org/redisson/RedissonSet.java
+++ b/src/main/java/org/redisson/RedissonSet.java
@@ -127,8 +127,7 @@ public class RedissonSet<V> extends RedissonExpirable implements RSet<V> {
         };
     }
 
-    @Override
-    public Future<Collection<V>> readAllAsync() {
+    private Future<Collection<V>> readAllAsync() {
         return commandExecutor.readAsync(getName(), RedisCommands.SMEMBERS, getName());
     }
 
diff --git a/src/main/java/org/redisson/client/protocol/RedisCommands.java b/src/main/java/org/redisson/client/protocol/RedisCommands.java
index 0fc389ce5..177933b9d 100644
--- a/src/main/java/org/redisson/client/protocol/RedisCommands.java
+++ b/src/main/java/org/redisson/client/protocol/RedisCommands.java
@@ -54,7 +54,7 @@ public interface RedisCommands {
     RedisStrictCommand<Integer> ZLEXCOUNT = new RedisStrictCommand<Integer>("ZLEXCOUNT", new IntegerReplayConvertor());
     RedisCommand<Boolean> ZSCORE_CONTAINS = new RedisCommand<Boolean>("ZSCORE", new BooleanNotNullReplayConvertor(), 2);
     RedisStrictCommand<Double> ZSCORE = new RedisStrictCommand<Double>("ZSCORE", new DoubleReplayConvertor());
-    RedisStrictCommand<Integer> ZRANK = new RedisStrictCommand<Integer>("ZRANK", new IntegerReplayConvertor());
+    RedisCommand<Integer> ZRANK = new RedisCommand<Integer>("ZRANK", new IntegerReplayConvertor(), 2);
     RedisCommand<List<Object>> ZRANGE = new RedisCommand<List<Object>>("ZRANGE", new ObjectListReplayDecoder<Object>());
     RedisCommand<List<Object>> ZRANGEBYLEX = new RedisCommand<List<Object>>("ZRANGEBYLEX", new ObjectListReplayDecoder<Object>());
     RedisCommand<List<ScoredEntry<Object>>> ZRANGE_ENTRY = new RedisCommand<List<ScoredEntry<Object>>>("ZRANGE", new ScoredSortedSetReplayDecoder<Object>());
diff --git a/src/main/java/org/redisson/client/protocol/convertor/IntegerReplayConvertor.java b/src/main/java/org/redisson/client/protocol/convertor/IntegerReplayConvertor.java
index 647f3aaf3..11529a0be 100644
--- a/src/main/java/org/redisson/client/protocol/convertor/IntegerReplayConvertor.java
+++ b/src/main/java/org/redisson/client/protocol/convertor/IntegerReplayConvertor.java
@@ -19,6 +19,9 @@ public class IntegerReplayConvertor extends SingleConvertor<Integer> {
 
     @Override
     public Integer convert(Object obj) {
+        if (obj == null) {
+            return null;
+        }
         return ((Long) obj).intValue();
     }
 
diff --git a/src/main/java/org/redisson/core/RCollectionAsync.java b/src/main/java/org/redisson/core/RCollectionAsync.java
index e1fe641d2..239f8dbae 100644
--- a/src/main/java/org/redisson/core/RCollectionAsync.java
+++ b/src/main/java/org/redisson/core/RCollectionAsync.java
@@ -31,8 +31,6 @@ public interface RCollectionAsync<V> extends RExpirableAsync {
 
     Future<Boolean> removeAsync(Object o);
 
-    Future<Collection<V>> readAllAsync();
-
     Future<Integer> sizeAsync();
 
     Future<Boolean> addAsync(V e);
diff --git a/src/main/java/org/redisson/core/RLexSortedSet.java b/src/main/java/org/redisson/core/RLexSortedSet.java
new file mode 100644
index 000000000..2a02eec3b
--- /dev/null
+++ b/src/main/java/org/redisson/core/RLexSortedSet.java
@@ -0,0 +1,39 @@
+/**
+ * Copyright 2014 Nikita Koksharov, Nickolay Borbit
+ *
+ * Licensed 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.redisson.core;
+
+import java.util.Collection;
+import java.util.Set;
+
+public interface RLexSortedSet extends RLexSortedSetAsync, Set<String>, RExpirable {
+
+    Integer lexCountTail(String fromElement, boolean fromInclusive);
+
+    Integer lexCountHead(String toElement, boolean toInclusive);
+
+    Collection<String> lexRangeTail(String fromElement, boolean fromInclusive);
+
+    Collection<String> lexRangeHead(String toElement, boolean toInclusive);
+
+    Collection<String> lexRange(String fromElement, boolean fromInclusive, String toElement, boolean toInclusive);
+
+    Integer lexCount(String fromElement, boolean fromInclusive, String toElement, boolean toInclusive);
+
+    Integer rank(String o);
+
+    Collection<String> valueRange(int startIndex, int endIndex);
+
+}
diff --git a/src/main/java/org/redisson/core/RLexSortedSetAsync.java b/src/main/java/org/redisson/core/RLexSortedSetAsync.java
new file mode 100644
index 000000000..9e705caa1
--- /dev/null
+++ b/src/main/java/org/redisson/core/RLexSortedSetAsync.java
@@ -0,0 +1,40 @@
+/**
+ * Copyright 2014 Nikita Koksharov, Nickolay Borbit
+ *
+ * Licensed 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.redisson.core;
+
+import java.util.Collection;
+
+import io.netty.util.concurrent.Future;
+
+public interface RLexSortedSetAsync extends RCollectionAsync<String> {
+
+    Future<Integer> lexCountTailAsync(String fromElement, boolean fromInclusive);
+
+    Future<Integer> lexCountHeadAsync(String toElement, boolean toInclusive);
+
+    Future<Collection<String>> lexRangeTailAsync(String fromElement, boolean fromInclusive);
+
+    Future<Collection<String>> lexRangeHeadAsync(String toElement, boolean toInclusive);
+
+    Future<Collection<String>> lexRangeAsync(String fromElement, boolean fromInclusive, String toElement, boolean toInclusive);
+
+    Future<Integer> lexCountAsync(String fromElement, boolean fromInclusive, String toElement, boolean toInclusive);
+
+    Future<Integer> rankAsync(String o);
+
+    Future<Collection<String>> valueRangeAsync(int startIndex, int endIndex);
+
+}
diff --git a/src/main/java/org/redisson/core/RScoredSortedSet.java b/src/main/java/org/redisson/core/RScoredSortedSet.java
index 6b48b816c..c000b362a 100644
--- a/src/main/java/org/redisson/core/RScoredSortedSet.java
+++ b/src/main/java/org/redisson/core/RScoredSortedSet.java
@@ -21,18 +21,6 @@ import org.redisson.client.protocol.ScoredEntry;
 
 public interface RScoredSortedSet<V> extends RScoredSortedSetAsync<V>, Iterable<V>, RExpirable {
 
-    Integer lexCountTail(V fromElement, boolean fromInclusive);
-
-    Integer lexCountHead(V toElement, boolean toInclusive);
-
-    Collection<V> lexRangeTail(V fromElement, boolean fromInclusive);
-
-    Collection<V> lexRangeHead(V toElement, boolean toInclusive);
-
-    Collection<V> lexRange(V fromElement, boolean fromInclusive, V toElement, boolean toInclusive);
-
-    Integer lexCount(V fromElement, boolean fromInclusive, V toElement, boolean toInclusive);
-
     Integer rank(V o);
 
     Double getScore(V o);
diff --git a/src/main/java/org/redisson/core/RScoredSortedSetAsync.java b/src/main/java/org/redisson/core/RScoredSortedSetAsync.java
index 9af7b60d5..644eb7c53 100644
--- a/src/main/java/org/redisson/core/RScoredSortedSetAsync.java
+++ b/src/main/java/org/redisson/core/RScoredSortedSetAsync.java
@@ -23,18 +23,6 @@ import io.netty.util.concurrent.Future;
 
 public interface RScoredSortedSetAsync<V> extends RExpirableAsync {
 
-    Future<Integer> lexCountTailAsync(V fromElement, boolean fromInclusive);
-
-    Future<Integer> lexCountHeadAsync(V toElement, boolean toInclusive);
-
-    Future<Collection<V>> lexRangeTailAsync(V fromElement, boolean fromInclusive);
-
-    Future<Collection<V>> lexRangeHeadAsync(V toElement, boolean toInclusive);
-
-    Future<Collection<V>> lexRangeAsync(V fromElement, boolean fromInclusive, V toElement, boolean toInclusive);
-
-    Future<Integer> lexCountAsync(V fromElement, boolean fromInclusive, V toElement, boolean toInclusive);
-
     Future<Integer> rankAsync(V o);
 
     Future<Double> getScoreAsync(V o);
diff --git a/src/test/java/org/redisson/RedissonScoredSortedSetTest.java b/src/test/java/org/redisson/RedissonScoredSortedSetTest.java
index 33319a425..0a8d14134 100644
--- a/src/test/java/org/redisson/RedissonScoredSortedSetTest.java
+++ b/src/test/java/org/redisson/RedissonScoredSortedSetTest.java
@@ -21,52 +21,6 @@ import io.netty.util.concurrent.Future;
 
 public class RedissonScoredSortedSetTest extends BaseTest {
 
-    @Test
-    public void testLexRangeTail() {
-        RScoredSortedSet<String> set = redisson.getScoredSortedSet("simple");
-        set.add(0, "a");
-        set.add(0, "b");
-        set.add(0, "c");
-        set.add(0, "d");
-        set.add(0, "e");
-        set.add(0, "f");
-        set.add(0, "g");
-
-        MatcherAssert.assertThat(set.lexRangeTail("c", false), Matchers.contains("d", "e", "f", "g"));
-        MatcherAssert.assertThat(set.lexRangeTail("c", true), Matchers.contains("c", "d", "e", "f", "g"));
-    }
-
-
-    @Test
-    public void testLexRangeHead() {
-        RScoredSortedSet<String> set = redisson.getScoredSortedSet("simple");
-        set.add(0, "a");
-        set.add(0, "b");
-        set.add(0, "c");
-        set.add(0, "d");
-        set.add(0, "e");
-        set.add(0, "f");
-        set.add(0, "g");
-
-        MatcherAssert.assertThat(set.lexRangeHead("c", false), Matchers.contains("a", "b"));
-        MatcherAssert.assertThat(set.lexRangeHead("c", true), Matchers.contains("a", "b", "c"));
-    }
-
-
-    @Test
-    public void testLexRange() {
-        RScoredSortedSet<String> set = redisson.getScoredSortedSet("simple");
-        set.add(0, "a");
-        set.add(0, "b");
-        set.add(0, "c");
-        set.add(0, "d");
-        set.add(0, "e");
-        set.add(0, "f");
-        set.add(0, "g");
-
-        MatcherAssert.assertThat(set.lexRange("aaa", true, "g", false), Matchers.contains("b", "c", "d", "e", "f"));
-    }
-
     @Test
     public void testRank() {
         RScoredSortedSet<String> set = redisson.getScoredSortedSet("simple");
@@ -81,21 +35,6 @@ public class RedissonScoredSortedSetTest extends BaseTest {
         Assert.assertEquals(3, (int)set.rank("d"));
     }
 
-    @Test
-    public void testLexCount() {
-        RScoredSortedSet<String> set = redisson.getScoredSortedSet("simple");
-        set.add(0, "a");
-        set.add(0, "b");
-        set.add(0, "c");
-        set.add(0, "d");
-        set.add(0, "e");
-        set.add(0, "f");
-        set.add(0, "g");
-
-        Assert.assertEquals(5, (int)set.lexCount("b", true, "f", true));
-        Assert.assertEquals(3, (int)set.lexCount("b", false, "f", false));
-    }
-
     @Test
     public void testAddAsync() throws InterruptedException, ExecutionException {
         RScoredSortedSet<Integer> set = redisson.getScoredSortedSet("simple");