Class: StreamStats::Stream

Inherits:
Object
  • Object
show all
Defined in:
lib/stream_stats/stream.rb,
ext/stream_stats/stream_stats.c

Constant Summary collapse

ATTRIBUTE_LIST = 
[:count, :sum, :min, :max, :mean, :stddev]

Instance Method Summary collapse

Constructor Details

#initialize(rb_eps, rb_quantiles) ⇒ Object 



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# File 'ext/stream_stats/stream_stats.c', line 13

static VALUE strstat_timer_init(VALUE self, VALUE rb_eps, VALUE rb_quantiles) {
  timer *i_timer;
  VALUE data;
  double eps, *quantiles;
  uint32_t num_quantiles;

  i_timer = (timer *) malloc(sizeof(timer));

  eps = NUM2DBL(rb_eps);

  switch (TYPE(rb_quantiles)) {
    case T_ARRAY:
      rb_iv_set(self, "@quantiles", rb_quantiles);
      num_quantiles = RARRAY_LEN(rb_quantiles);
      if (num_quantiles < 1)
        rb_raise(rb_eRuntimeError, "no quantiles defined");
      quantiles = malloc(sizeof(double) * num_quantiles);
      for (int i = 0; i < num_quantiles; i++) {
        quantiles[i] = NUM2DBL(rb_ary_entry(rb_quantiles, i));
      }
      break;
    default:
      /* raise exception */
      rb_raise(rb_eTypeError, "not valid value");
      break;
  }

  if (init_timer(eps, quantiles, num_quantiles, i_timer) != 0)
    rb_raise(rb_eArgError, "failed to initialize");

  data = Data_Wrap_Struct(timer_class, NULL, strstat_timer_free, i_timer);
  rb_ivar_set(self, rb_intern("internal_struct"), data);

  return Qnil;
}

Instance Method Details

#<<(rb_sample) ⇒ Object 



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# File 'ext/stream_stats/stream_stats.c', line 58

static VALUE strstat_timer_add_sample(VALUE self, VALUE rb_sample) {

  double sample;
  timer *i_timer;
  int returned;

  sample = NUM2DBL(rb_sample);
  i_timer = (timer*) strstat_get_struct(self);

  returned = timer_add_sample(i_timer, sample);
  if (returned != 0) {
    rb_raise(rb_eRuntimeError, "add sample returned %d", returned);
  }

  return Qnil;
}

#count ⇒ Object 



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# File 'ext/stream_stats/stream_stats.c', line 75

static VALUE strstat_timer_count(VALUE self) {
  timer *i_timer;

  i_timer = (timer*) strstat_get_struct(self);

  return LONG2NUM(timer_count(i_timer));
}

#get_quantiles ⇒ Object 



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# File 'lib/stream_stats/stream.rb', line 6

def get_quantiles
  Hash[@quantiles.map do |q|
    [q, quantile(q)]
  end]
end

#inspect ⇒ Object 



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# File 'lib/stream_stats/stream.rb', line 12

def inspect
  attr_list = ATTRIBUTE_LIST.map do |method|
    "#{method.to_s}: #{self.send(method)}"
  end * ', '
  "#{self.to_s} {#{attr_list}, quantiles: #{get_quantiles.to_s}}"
end

#max ⇒ Object 



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# File 'ext/stream_stats/stream_stats.c', line 115

static VALUE strstat_timer_max(VALUE self) {
  return strstat_timer_commoncall(self, timer_max);
}

#mean ⇒ Object 



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# File 'ext/stream_stats/stream_stats.c', line 118

static VALUE strstat_timer_mean(VALUE self) {
  return strstat_timer_commoncall(self, timer_mean);
}

#min ⇒ Object 



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# File 'ext/stream_stats/stream_stats.c', line 112

static VALUE strstat_timer_min(VALUE self) {
  return strstat_timer_commoncall(self, timer_min);
}

#percentile(rb_percentile) ⇒ Object 



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# File 'ext/stream_stats/stream_stats.c', line 95

static VALUE strstat_timer_percentile(VALUE self, VALUE rb_percentile) {
  int percentile;

  percentile = NUM2INT(rb_percentile);
  if (percentile < 0 || percentile > 100)
    rb_raise(rb_eRuntimeError, "invalid percentile");

  return strstat_timer_query(self, DBL2NUM(percentile / 100.0));
}

#quantile(rb_query) ⇒ Object 



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# File 'ext/stream_stats/stream_stats.c', line 83

static VALUE strstat_timer_query(VALUE self, VALUE rb_query) {
  double query;
  timer *i_timer;

  query = NUM2DBL(rb_query);
  if (query < 0 || query > 1)
    rb_raise(rb_eRuntimeError, "invalid quantile");

  i_timer = (timer*) strstat_get_struct(self);
  return DBL2NUM(timer_query(i_timer, query));
}

#squared_sum ⇒ Object 



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# File 'ext/stream_stats/stream_stats.c', line 127

static VALUE strstat_timer_squared_sum(VALUE self) {
  return strstat_timer_commoncall(self, timer_squared_sum);
}

#stddev ⇒ Object 



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# File 'ext/stream_stats/stream_stats.c', line 121

static VALUE strstat_timer_stddev(VALUE self) {
  return strstat_timer_commoncall(self, timer_stddev);
}

#sum ⇒ Object 



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# File 'ext/stream_stats/stream_stats.c', line 124

static VALUE strstat_timer_sum(VALUE self) {
  return strstat_timer_commoncall(self, timer_sum);
}