raft client

If you want to know what is raft, take a look at readme.md in raft component

raft client is used to send request to raft server cluster.

• write the conf.xml in conf folder

• implements Callback interface, which is used to process database query result

    public class MyCallback implements Callback {
    public void callback(List<Map<String, Object>> results) {
    		for(Map<String, Object> row : results) {
    			int index = (Integer)row.get("logIndex");
    			String command = (String)row.get("command");
    			System.out.println(index + " " + command);
    		}
    	}
    }	
  

  the parameter results contains rows of dataset.

• write the conf.xml in conf folder

• call the send_command() function

    String cmd = "select * from log where term = 3";
    new Client().send_command(cmd, true, new MyCallback());// true mean this command is query command