Support COMMAND [...] commands

src/main/java/redis/clients/jedis/BuilderFactory.java

@@ -426,6 +426,15 @@ public String toString() {
     }
   };
 
+  public static final Builder<List<KeyValue<String, List<String>>>> KEYED_STRING_LIST_LIST
+      = new Builder<List<KeyValue<String, List<String>>>>() {
+    @Override
+    public List<KeyValue<String, List<String>>> build(Object data) {
+      List<Object> list = (List<Object>) data;
+      return list.stream().map(KEYED_STRING_LIST::build).collect(Collectors.toList());
+    }
+  };
+
   public static final Builder<KeyValue<byte[], List<byte[]>>> KEYED_BINARY_LIST
       = new Builder<KeyValue<byte[], List<byte[]>>>() {
     @Override
@@ -772,6 +781,51 @@ public String toString() {
     }
   };
 
+  public static final Builder<Map<String, CommandDocument>> COMMAND_DOCS_RESPONSE = new Builder<Map<String, CommandDocument>>() {
+    @Override
+    public Map<String, CommandDocument> build(Object data) {
+      if (data == null) {
+        return null;
+      }
+
+      List<Object> list = (List<Object>) data;
+      Map<String, CommandDocument> map = new HashMap<>(list.size());
+
+      for (int i = 0; i < list.size();) {
+        String name = STRING.build(list.get(i++));
+        CommandDocument doc = CommandDocument.COMMAND_DOCUMENT_BUILDER.build(list.get(i++));
+        map.put(name, doc);
+      }
+
+      return map;
+    }
+  };
+
+  public static final Builder<Map<String, CommandInfo>> COMMAND_INFO_RESPONSE = new Builder<Map<String, CommandInfo>>() {
+    @Override
+    public Map<String, CommandInfo> build(Object data) {
+      if (data == null) {
+        return null;
+      }
+
+      List<Object> rawList = (List<Object>) data;
+      Map<String, CommandInfo> map = new HashMap<>(rawList.size());
+
+      for (Object rawCommandInfo : rawList) {
+        if (rawCommandInfo == null) {
+          continue;
+        }
+
+        List<Object> commandInfo = (List<Object>) rawCommandInfo;
+        String name = STRING.build(commandInfo.get(0));
+        CommandInfo info = CommandInfo.COMMAND_INFO_BUILDER.build(commandInfo);
+        map.put(name, info);
+      }
+
+      return map;
+    }
+  };
+
   public static final Builder<List<Module>> MODULE_LIST = new Builder<List<Module>>() {
     @Override
     public List<Module> build(Object data) {

src/main/java/redis/clients/jedis/Jedis.java

@@ -8042,6 +8042,49 @@ public long bitop(final BitOP op, final String destKey, final String... srcKeys)
     return connection.executeCommand(commandObjects.bitop(op, destKey, srcKeys));
   }
 
+  public long commandCount() {
+    checkIsInMultiOrPipeline();
+    connection.sendCommand(COMMAND, COUNT);
+    return connection.getIntegerReply();
+  }
+
+  public Map<String, CommandDocument> commandDocs(String... commands) {
+    checkIsInMultiOrPipeline();
+    connection.sendCommand(COMMAND, joinParameters(DOCS.name(), commands));
+    return BuilderFactory.COMMAND_DOCS_RESPONSE.build(connection.getOne());
+  }
+
+  public List<String> commandGetKeys(String... command) {
+    checkIsInMultiOrPipeline();
+    connection.sendCommand(COMMAND, joinParameters(GETKEYS.name(), command));
+    return BuilderFactory.STRING_LIST.build(connection.getOne());
+  }
+
+  public List<KeyValue<String, List<String>>> commandGetKeysAndFlags(String... command) {
+    checkIsInMultiOrPipeline();
+    connection.sendCommand(COMMAND, joinParameters(GETKEYSANDFLAGS.name(), command));
+    return BuilderFactory.KEYED_STRING_LIST_LIST.build(connection.getOne());
+  }
+
+  public Map<String, CommandInfo> commandInfo(String... commands) {
+    checkIsInMultiOrPipeline();
+    connection.sendCommand(COMMAND, joinParameters(Keyword.INFO.name(), commands));
+    return BuilderFactory.COMMAND_INFO_RESPONSE.build(connection.getOne());
+  }
+
+  public List<String> commandList() {
+    checkIsInMultiOrPipeline();
+    connection.sendCommand(COMMAND, LIST);
+    return BuilderFactory.STRING_LIST.build(connection.getOne());
+  }
+
+  public List<String> commandListFilterBy(CommandListFilterByParams filterByParams) {
+    checkIsInMultiOrPipeline();
+    CommandArguments args = new CommandArguments(COMMAND).add(LIST).addParams(filterByParams);
+    connection.sendCommand(args);
+    return BuilderFactory.STRING_LIST.build(connection.getOne());
+  }
+
   @Override
   public String sentinelMyId() {
     connection.sendCommand(SENTINEL, MYID);
@@ -8993,28 +9036,28 @@ public long geosearchStoreStoreDist(String dest, String src, GeoSearchParam para
   @Override
   public String moduleLoad(final String path) {
     checkIsInMultiOrPipeline();
-    connection.sendCommand(MODULE, LOAD.name(), path);
+    connection.sendCommand(Command.MODULE, LOAD.name(), path);
     return connection.getStatusCodeReply();
   }
 
   @Override
   public String moduleLoad(String path, String... args) {
     checkIsInMultiOrPipeline();
-    connection.sendCommand(MODULE, joinParameters(LOAD.name(), path, args));
+    connection.sendCommand(Command.MODULE, joinParameters(LOAD.name(), path, args));
     return connection.getStatusCodeReply();
   }
 
   @Override
   public String moduleUnload(final String name) {
     checkIsInMultiOrPipeline();
-    connection.sendCommand(MODULE, UNLOAD.name(), name);
+    connection.sendCommand(Command.MODULE, UNLOAD.name(), name);
     return connection.getStatusCodeReply();
   }
 
   @Override
   public List<Module> moduleList() {
     checkIsInMultiOrPipeline();
-    connection.sendCommand(MODULE, LIST);
+    connection.sendCommand(Command.MODULE, LIST);
     return BuilderFactory.MODULE_LIST.build(connection.getObjectMultiBulkReply());
   }
 

src/main/java/redis/clients/jedis/Protocol.java

@@ -237,7 +237,7 @@ public static enum Command implements ProtocolCommand {
     XADD, XLEN, XDEL, XTRIM, XRANGE, XREVRANGE, XREAD, XACK, XGROUP, XREADGROUP, XPENDING, XCLAIM,
     XAUTOCLAIM, XINFO, BITFIELD_RO, ROLE, FAILOVER, GEOSEARCH, GEOSEARCHSTORE, EVAL_RO, EVALSHA_RO,
     LOLWUT, EXPIRETIME, PEXPIRETIME, FUNCTION, FCALL, FCALL_RO, LMPOP, BLMPOP, ZMPOP, BZMPOP,
-    @Deprecated STRALGO;
+    COMMAND, @Deprecated STRALGO;
 
     private final byte[] raw;
 
@@ -262,8 +262,8 @@ public static enum Keyword implements Rawable {
     TIMEOUT, ABORT, NX, XX, EX, PX, EXAT, PXAT, CH, WITHCOORD, WITHDIST, WITHHASH, STOREDIST, COPY,
     KEEPTTL, AUTH, AUTH2, INFO, CHANNELS, NUMPAT, NUMSUB, FULL, NOW, VERSION, KEYS, IDX, SCHEDULE,
     ANY, FROMMEMBER, FROMLONLAT, BYRADIUS, BYBOX, BYLEX, BYSCORE, REV, MINMATCHLEN, WITHMATCHLEN,
-    PURGE, STATS, CREATECONSUMER, DELETE, LIBRARYNAME, WITHCODE, DESCRIPTION,
-    @Deprecated LCS, @Deprecated STRINGS;
+    PURGE, STATS, CREATECONSUMER, DELETE, LIBRARYNAME, WITHCODE, DESCRIPTION, GETKEYS, GETKEYSANDFLAGS,
+    DOCS, FILTERBY, MODULE, ACLCAT, PATTERN, @Deprecated LCS, @Deprecated STRINGS;
 
     private final byte[] raw;
 

src/main/java/redis/clients/jedis/commands/CommandCommands.java

@@ -0,0 +1,61 @@
+package redis.clients.jedis.commands;
+
+import redis.clients.jedis.params.CommandListFilterByParams;
+import redis.clients.jedis.resps.CommandDocument;
+import redis.clients.jedis.resps.CommandInfo;
+import redis.clients.jedis.util.KeyValue;
+
+import java.util.List;
+import java.util.Map;
+
+public interface CommandCommands {
+
+  /**
+   * The number of total commands in this Redis server
+   * @return The number of total commands
+   */
+  long commandCount();
+
+  /**
+   * Return documentary information about commands.
+   * If not specifying commands, the reply includes all the server's commands.
+   * @param commands specify the names of one or more commands
+   * @return list of {@link CommandDocument}
+   */
+
+  Map<String, CommandDocument> commandDocs(String... commands);
+
+  /**
+   * Return list of keys from a full Redis command
+   * @param command
+   * @return list of keys
+   */
+  List<String> commandGetKeys(String... command);
+
+  /**
+   * Return list of keys from a full Redis command and their usage flags
+   * @param command
+   * @return list of {@link KeyValue}
+   */
+  List<KeyValue<String, List<String>>> commandGetKeysAndFlags(String... command);
+
+  /**
+   * Return details about multiple Redis commands
+   * @param commands
+   * @return list of {@link CommandInfo}
+   */
+  Map<String, CommandInfo> commandInfo(String... commands);
+
+  /**
+   * Return a list of the server's command names
+   * @return commands list
+   */
+  List<String> commandList();
+
+  /**
+   * Return a list of the server's command names filtered by module's name, ACL category or pattern
+   * @param filterByParams {@link CommandListFilterByParams}
+   * @return commands list
+   */
+  List<String> commandListFilterBy(CommandListFilterByParams filterByParams);
+}

src/main/java/redis/clients/jedis/params/CommandListFilterByParams.java

@@ -0,0 +1,52 @@
+package redis.clients.jedis.params;
+
+import redis.clients.jedis.CommandArguments;
+import redis.clients.jedis.exceptions.JedisDataException;
+
+import static redis.clients.jedis.Protocol.Keyword.FILTERBY;
+import static redis.clients.jedis.Protocol.Keyword.MODULE;
+import static redis.clients.jedis.Protocol.Keyword.ACLCAT;
+import static redis.clients.jedis.Protocol.Keyword.PATTERN;
+
+public class CommandListFilterByParams implements IParams {
+  private String moduleName;
+  private String category;
+  private String pattern;
+
+  public static CommandListFilterByParams commandListFilterByParams() {
+    return new CommandListFilterByParams();
+  }
+
+  public CommandListFilterByParams filterByModule(String moduleName) {
+    this.moduleName = moduleName;
+    return this;
+  }
+
+  public CommandListFilterByParams filterByAclCat(String category) {
+    this.category = category;
+    return this;
+  }
+
+  public CommandListFilterByParams filterByPattern(String pattern) {
+    this.pattern = pattern;
+    return this;
+  }
+
+  @Override
+  public void addParams(CommandArguments args) {
+    args.add(FILTERBY);
+
+    if (moduleName != null && category == null && pattern == null) {
+      args.add(MODULE);
+      args.add(moduleName);
+    } else if (moduleName == null && category != null && pattern == null) {
+      args.add(ACLCAT);
+      args.add(category);
+    } else if (moduleName == null && category == null && pattern != null) {
+      args.add(PATTERN);
+      args.add(pattern);
+    } else {
+      throw new JedisDataException("Must choose exactly one filter");
+    }
+  }
+}

src/main/java/redis/clients/jedis/resps/CommandDocument.java

@@ -0,0 +1,64 @@
+package redis.clients.jedis.resps;
+
+import redis.clients.jedis.Builder;
+
+import static redis.clients.jedis.BuilderFactory.STRING;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class CommandDocument {
+  private final String summary;
+  private final String since;
+  private final String group;
+  private final String complexity;
+  private final List<String> history;
+
+  public CommandDocument(String summary, String since, String group, String complexity, List<String> history) {
+    this.summary = summary;
+    this.since = since;
+    this.group = group;
+    this.complexity = complexity;
+    this.history = history;
+  }
+
+  public String getSummary() {
+    return summary;
+  }
+
+  public String getSince() {
+    return since;
+  }
+
+  public String getGroup() {
+    return group;
+  }
+
+  public String getComplexity() {
+    return complexity;
+  }
+
+  public List<String> getHistory() {
+    return history;
+  }
+
+  public static final Builder<CommandDocument> COMMAND_DOCUMENT_BUILDER = new Builder<CommandDocument>() {
+    @Override
+    public CommandDocument build(Object data) {
+      List<Object> commandData = (List<Object>) data;
+      String summary = STRING.build(commandData.get(1));
+      String since = STRING.build(commandData.get(3));
+      String group = STRING.build(commandData.get(5));
+      String complexity = STRING.build(commandData.get(7));
+      List<String> history = null;
+      if (STRING.build(commandData.get(8)).equals("history")) {
+        List<List<Object>> rawHistory = (List<List<Object>>) commandData.get(9);
+        history = new ArrayList<>(rawHistory.size());
+        for (List<Object> timePoint : rawHistory) {
+          history.add(STRING.build(timePoint.get(0)) + ": " + STRING.build(timePoint.get(1)));
+        }
+      }
+      return new CommandDocument(summary, since, group, complexity, history);
+    }
+  };
+}