redis 0.3.0

fast and simple redis-database client

redis-dart

Redis protocol parser and client It is designed to be fast and simple to use.

Curretly supported features:

• raw commands
• unicode
• transactions

fast

It can perform 110K SET or GET operations per second. This is code that yields such result and can give you first impression

const int N = 200000;
int start;
RedisConnection conn = new RedisConnection();
conn.connect('localhost',6379).then((Command command){
  print("test started, please wait ...");
  start =  new DateTime.now().millisecondsSinceEpoch;
  command.pipe_start();
  for(int i=1;i<N;i++){ 
    command.set("test $i","$i")
    .then((v){
      assert(v=="OK");
    });
  }
  //last command will be executed and then processed last
  command.set("test $N","$N").then((v){
    assert(v=="OK"); 
    double diff = (new DateTime.now().millisecondsSinceEpoch - start)/1000.0;
    double perf = N/diff;
    print("$N operations done in $diff s\nperformance $perf/s");
  });
  command.pipe_end();
 });

Simple

Redis protocol is coposition of array, strings(and bulk) and integers. For example executing command SET key value is no more that serializing array of strings ["SET","key","value"]. Cammands can be executed by

Future f = command.send_object(["SET","key","value"]);

This enables sending any command you need.

More examples

Transactions

Transactions are started by command MULTI and then complited with command EXEC. .multi() and .exec() and class Transaction are implemeted as additional helpers for checking result of each command executed during transation.

RedisConnection conn = new RedisConnection();
conn.connect('localhost',6379).then((Command command){    
  command.multi().then((Transation trans){
      trans.send_object(["SET","val","0"]); 
      for(int i=0;i<100000;++i){
        trans.send_object(["INCR","val"]).then((v){
          assert(i==v);
        });
      }
      trans.send_object(["GET","test"]).then((v){
        print("number is now $v");
      });
      trans.exec();
  });
});

Take note here, that Future returned by trans.send_object() is executed after .exec() so make sure you dont try to call .exec() inside of such Future, becuase command will never complete.