/*
* Copyright 2013 Netflix, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.netflix.suro.routing;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.base.Strings;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.netflix.servo.monitor.DynamicCounter;
import com.netflix.servo.monitor.MonitorConfig;
import com.netflix.servo.monitor.Monitors;
import com.netflix.suro.TagKey;
import com.netflix.suro.input.SuroInput;
import com.netflix.suro.message.DefaultMessageContainer;
import com.netflix.suro.message.Message;
import com.netflix.suro.message.MessageContainer;
import com.netflix.suro.routing.RoutingMap.Route;
import com.netflix.suro.sink.Sink;
import com.netflix.suro.sink.SinkManager;
import java.util.List;
/**
* Message routing module according to {@link RoutingMap}
*
* @author jbae
*/
@Singleton
public class MessageRouter {
private final RoutingMap routingMap;
private final SinkManager sinkManager;
private final ObjectMapper jsonMapper;
@Inject
public MessageRouter(
RoutingMap routingMap,
SinkManager sinkManager,
ObjectMapper jsonMapper) {
this.routingMap = routingMap;
this.sinkManager = sinkManager;
this.jsonMapper = jsonMapper;
Monitors.registerObject(this);
}
public void process(SuroInput input, MessageContainer msg) throws Exception {
if (Strings.isNullOrEmpty(msg.getRoutingKey())) {
DynamicCounter.increment(
MonitorConfig.builder(TagKey.DROPPED_COUNT).withTag("reason", "emptyRoutingKey").build());
return; // discard message
}
RoutingMap.RoutingInfo info = routingMap.getRoutingInfo(msg.getRoutingKey());
if (info == null) {
Sink defaultSink = sinkManager.getSink("default");
input.setPause(defaultSink.checkPause());
defaultSink.writeTo(msg);
} else if (info.doFilter(msg)) {
List<Route> routes = info.getWhere();
for (Route route : routes) {
if (route.doFilter(msg)) {
Sink sink = sinkManager.getSink(route.getSink());
input.setPause(sink.checkPause());
if (!Strings.isNullOrEmpty(route.getAlias())) {
sink.writeTo(
new DefaultMessageContainer(
new Message(route.getAlias(), msg.getMessage().getPayload()), jsonMapper));
} else {
sink.writeTo(msg);
}
}
}
}
}
}