connect in sendCommand() and don't check with isConnected() two times

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

@@ -50,9 +50,13 @@ public class Connection {
     }
 
     protected Connection sendCommand(String name, String... args) {
-	if (!isConnected()) {
-	    throw new JedisException("Please connect Jedis before using it.");
-	}
+		try {
+			connect();
+		} catch (UnknownHostException e) {
+			throw new JedisException("Could not connect to redis-server", e);
+		} catch (IOException e) {
+			throw new JedisException("Could not connect to redis-server", e);
+		}
 	protocol.sendCommand(outputStream, name, args);
 	pipelinedCommands++;
 	return this;

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

@@ -15,4 +15,8 @@ public class JedisException extends RuntimeException {
     public JedisException(IOException e) {
 	super(e);
     }
+
+	public JedisException(String message, Throwable cause) {
+		super(message, cause);
+	}
 }