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Share routing rules among all requests #211

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Share routing rules among all requests #211

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21 changes: 9 additions & 12 deletions gateway-ha/src/main/java/com/lyft/data/gateway/ha/router/RoutingGroupSelector.java
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Original file line number Diff line number Diff line change
Expand Up @@ -36,24 +36,21 @@ static RoutingGroupSelector byRoutingGroupHeader() {
static RoutingGroupSelector byRoutingRulesEngine(String rulesConfigPath) {
RulesEngine rulesEngine = new DefaultRulesEngine();
MVELRuleFactory ruleFactory = new MVELRuleFactory(new YamlRuleDefinitionReader());

return request -> {
try {
Rules rules = ruleFactory.createRules(
new FileReader(rulesConfigPath));
try {
final Rules rules = ruleFactory.createRules(new FileReader(rulesConfigPath));
return request -> {
Facts facts = new Facts();
HashMap<String, String> result = new HashMap<String, String>();
facts.put("request", request);
facts.put("result", result);
rulesEngine.fire(rules, facts);
return result.get("routingGroup");
} catch (Exception e) {
Logger.log.error("Error opening rules configuration file,"
+ " using routing group header as default.", e);
return Optional.ofNullable(request.getHeader(ROUTING_GROUP_HEADER))
.orElse(request.getHeader(ALTERNATE_ROUTING_GROUP_HEADER));
}
};
};
} catch (Exception e) {
Logger.log.error("Error opening rules configuration file,"
+ " using routing group header as default.", e);
return byRoutingGroupHeader();
}
}

/**
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