com.avanza.astrix.ft.hystrix.HystrixStrategyDispatcher Maven / Gradle / Ivy
/*
* Copyright 2014 Avanza Bank AB
*
* 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.avanza.astrix.ft.hystrix;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.avanza.hystrix.multiconfig.MultiConfigs;
import com.netflix.hystrix.Hystrix;
final class HystrixStrategyDispatcher {
private static final Logger log = LoggerFactory.getLogger(HystrixStrategyDispatcher.class);
private static final HystrixStrategyMapping strategyMapping = new HystrixStrategyMapping();
static {
initHystrixPlugins();
}
/**
* Registers a set of HystrixStrategies in the dispatcher.
*
* @param hystrixStrategies
*/
static void registerStrategies(HystrixStrategies hystrixStrategies) {
strategyMapping.registerStrategies(hystrixStrategies);
verifyInitialized();
}
private static void verifyInitialized() {
// Hystrix already initialized, verify that Astrix-plugins are used
synchronized (log) {
if (!MultiConfigs.containsAllMappings("astrix")) {
log.warn("Hystrix MultiConfig is not properly initialized. This means that the current Hystrix MultiConfig configuration was reset outside of Astrix. "
+ "Astrix will reset Hystrix MultiConfig configuration and register custom Astrix stratgeis");
registerDispatcherStrategies();
}
MultiConfigs.verifyRegistered();
}
}
private static void initHystrixPlugins() {
try {
registerDispatcherStrategies();
} catch (Exception e) {
log.warn("Failed to init Hystrix with custom Astrix strategies. Hystrix configuration will be reset and one more registreation attempt will be performed", e);
Hystrix.reset();
registerDispatcherStrategies();
}
}
private static void registerDispatcherStrategies() {
MultiConfigs.register("astrix", new PropertiesStrategyDispatcher(strategyMapping));
MultiConfigs.register("astrix", new ConcurrencyStrategyDispatcher(strategyMapping));
MultiConfigs.register("astrix", new EventNotifierDispatcher(strategyMapping));
log.info("Successfully initialized Hystrix MultiConfig with custom Astrix strategies");
}
}