package com.thinkbiganalytics.servicemonitor;
/*-
* #%L
* thinkbig-service-monitor-controller
* %%
* Copyright (C) 2017 ThinkBig Analytics
* %%
* 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.
* #L%
*/
import com.thinkbiganalytics.servicemonitor.check.ServiceStatusCheck;
import com.thinkbiganalytics.servicemonitor.check.ServicesStatusCheck;
import com.thinkbiganalytics.servicemonitor.model.ServiceStatusResponse;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.annotation.Configuration;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
/**
* Application Bean that looks for all beans implementing either ServiceStatusCheck or ServicesStatusCheck
*/
@Configuration
public class ServiceMonitorManager implements ApplicationContextAware, InitializingBean {
private List<ServiceStatusCheck> services;
private List<ServicesStatusCheck> servicesHealth;
private ApplicationContext applicationContext;
private int totalServices;
public ServiceMonitorManager() {
this.services = new ArrayList<>();
this.servicesHealth = new ArrayList<>();
}
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
this.applicationContext = applicationContext;
}
@Override
public void afterPropertiesSet() throws Exception {
Map<String, ServiceStatusCheck> map = applicationContext.getBeansOfType(ServiceStatusCheck.class);
if (map != null) {
this.services.addAll(map.values());
}
Map<String, ServicesStatusCheck> servicesMap = applicationContext.getBeansOfType(ServicesStatusCheck.class);
if (servicesMap != null) {
this.servicesHealth.addAll(servicesMap.values());
}
totalServices = this.services.size() + this.servicesHealth.size();
}
private Callable<List<ServiceStatusResponse>> servicesCheckAsCallable(final ServicesStatusCheck servicesStatusCheck) {
return new Callable<List<ServiceStatusResponse>>() {
@Override
public List<ServiceStatusResponse> call() throws Exception {
return servicesStatusCheck.healthCheck();
}
};
}
private Callable<List<ServiceStatusResponse>> serviceCheckAsCallable(final ServiceStatusCheck servicesStatusCheck) {
return new Callable<List<ServiceStatusResponse>>() {
@Override
public List<ServiceStatusResponse> call() throws Exception {
return Arrays.asList(servicesStatusCheck.healthCheck());
}
};
}
/**
* Run a service check on the system.
* Each service will run in a separate thread and return status back
*
* @return a list of service status objects
*/
public List<ServiceStatusResponse> doServiceCheck() {
List<ServiceStatusResponse> serviceHealthResponseList = new ArrayList<ServiceStatusResponse>();
if (totalServices > 0) {
ExecutorService pool = Executors.newFixedThreadPool(totalServices);
List<Callable<List<ServiceStatusResponse>>> tasks = new ArrayList<>();
for (ServiceStatusCheck serviceHealth : services) {
tasks.add(serviceCheckAsCallable(serviceHealth));
}
for (ServicesStatusCheck serviceHealth : servicesHealth) {
tasks.add(servicesCheckAsCallable(serviceHealth));
}
try {
List<Future<List<ServiceStatusResponse>>> results = pool.invokeAll(tasks);
for (Future<List<ServiceStatusResponse>> result : results) {
try {
List<ServiceStatusResponse> responses = result.get();
if (responses != null) {
for (ServiceStatusResponse response : responses) {
if (response != null) {
serviceHealthResponseList.add(response);
}
}
}
} catch (Exception e) {
}
}
} catch (Exception e) {
}
pool.shutdown();
}
return serviceHealthResponseList;
}
}