loadRules: function loadRules()

in packages/core/lib/middleware/sampling/rule_cache.js [40:72]

• 24 lines of code
• 4 McCabe index (conditional complexity)

  loadRules: function loadRules(rules) {
    // Record the old rules for later merging.
    var oldRules = {};
    this.rules.forEach(function(rule) {
      oldRules[rule.getName()] = rule;
    });

    // Update the rules in the cache.
    this.rules = rules;

    // Transfer state information to refreshed rules.
    this.rules.forEach(function(rule) {
      var oldRule = oldRules[rule.getName()];
      if (oldRule) {
        rule.merge(oldRule);
      }
    });

    // The cache should maintain the order of the rules based on
    // priority. If priority is the same we sort name by alphabet
    // as rule name is unique.
    this.rules.sort(function(a, b) {
      var v = a.getPriority() - b.getPriority();
      if (v !== 0) {
        return v;
      }
      if (a.getName() > b.getName()) {
        return 1;
      } else {
        return -1;
      }
    });
  },