de.codecentric.spring.boot.chaos.monkey.assaults.KillAppAssault Maven / Gradle / Ivy

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/*
 * Copyright 2018 the original author or authors.
 *
 * 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 de.codecentric.spring.boot.chaos.monkey.assaults;

import de.codecentric.spring.boot.chaos.monkey.component.MetricEventPublisher;
import de.codecentric.spring.boot.chaos.monkey.component.MetricType;
import de.codecentric.spring.boot.chaos.monkey.configuration.ChaosMonkeySettings;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.ExitCodeGenerator;
import org.springframework.boot.SpringApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/** @author Thorsten Deelmann */
public class KillAppAssault implements ChaosMonkeyRuntimeAssault, ApplicationContextAware {

  private static final Logger Logger = LoggerFactory.getLogger(KillAppAssault.class);

  private final ChaosMonkeySettings settings;

  private ApplicationContext context;

  private MetricEventPublisher metricEventPublisher;

  public KillAppAssault(ChaosMonkeySettings settings, MetricEventPublisher metricEventPublisher) {
    this.settings = settings;
    this.metricEventPublisher = metricEventPublisher;
  }

  @Override
  public boolean isActive() {
    return settings.getAssaultProperties().isKillApplicationActive();
  }

  @Override
  public void attack() {
    try {
      Logger.info("Chaos Monkey - I am killing your Application!");

      if (metricEventPublisher != null) {
        metricEventPublisher.publishMetricEvent(MetricType.KILLAPP_ASSAULT);
      }

      int exit = SpringApplication.exit(context, (ExitCodeGenerator) () -> 0);
      Thread.sleep(5000); // wait before kill to deliver some metrics

      System.exit(exit);
    } catch (Exception e) {
      Logger.info("Chaos Monkey - Unable to kill the App, I am not the BOSS!");
    }
  }

  @Override
  public void setApplicationContext(ApplicationContext applicationContext) {
    this.context = applicationContext;
  }
}