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package org.onap.so.adapters.cnf.service.healthcheck;
import com.google.common.util.concurrent.ThreadFactoryBuilder;
import org.onap.so.adapters.cnf.client.MulticloudClient;
import org.onap.so.adapters.cnf.model.CheckInstanceRequest;
import org.onap.so.adapters.cnf.model.InstanceRequest;
import org.onap.so.adapters.cnf.model.healthcheck.HealthCheckInstance;
import org.onap.so.adapters.cnf.model.healthcheck.HealthCheckInstanceResponse;
import org.onap.so.adapters.cnf.model.healthcheck.HealthCheckResponse;
import org.onap.so.adapters.cnf.model.healthcheck.K8sRbInstanceHealthCheck;
import org.onap.so.adapters.cnf.model.healthcheck.K8sRbInstanceHealthCheckSimple;
import org.onap.so.adapters.cnf.service.CnfAdapterService;
import org.onap.so.client.exception.BadResponseException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ThreadFactory;
import java.util.stream.Collectors;
import static java.lang.Thread.sleep;
import static java.util.concurrent.Executors.newFixedThreadPool;
@Service
public class HealthCheckService {
private static final Logger log = LoggerFactory.getLogger(CnfAdapterService.class);
private final MulticloudClient instanceApi;
@Autowired
public HealthCheckService(MulticloudClient multicloudClient) {
this.instanceApi = multicloudClient;
}
public HealthCheckResponse healthCheck(CheckInstanceRequest healthCheckRequest) throws Exception {
log.info("Health check - START");
List<HealthCheckInstance> instanceHealthCheckList = startInstanceHealthCheck(healthCheckRequest);
HealthCheckResponse statuses = getStatuses(instanceHealthCheckList);
log.info("Health check - END");
return statuses;
}
private List<HealthCheckInstance> startInstanceHealthCheck(CheckInstanceRequest healthCheckRequest) throws Exception {
log.debug("startInstanceHealthCheck - START");
List<HealthCheckInstance> healthCheckInstanceList = new ArrayList<>();
for (InstanceRequest instance : healthCheckRequest.getInstances()) {
String instanceId = instance.getInstanceId();
K8sRbInstanceHealthCheckSimple response = instanceApi.startInstanceHealthCheck(instanceId);
log.info("K8sRbInstanceHealthCheckSimple: {}", response);
healthCheckInstanceList.add(new HealthCheckInstance(instanceId, response.getId()));
}
log.info("healthCheckInstanceList: {}", healthCheckInstanceList);
log.debug("startInstanceHealthCheck - END");
return healthCheckInstanceList;
}
private HealthCheckResponse getStatuses(List<HealthCheckInstance> instanceHealthCheckList) throws Exception {
log.debug("getStatuses - START");
List<HealthCheckThread> threads = instanceHealthCheckList.stream()
.map(HealthCheckThread::new)
.collect(Collectors.toList());
int processors = Runtime.getRuntime().availableProcessors();
ThreadFactory threadFactory = new ThreadFactoryBuilder().setNameFormat("Health-check-thread-%d").build();
ExecutorService executorService = newFixedThreadPool(processors, threadFactory);
HealthCheckResponse response = new HealthCheckResponse();
List<HealthCheckInstanceResponse> healthCheckInstance = null;
healthCheckInstance = executorService.invokeAll(threads).stream()
.map(future -> {
try {
InstanceStatusTuple instanceStatusTuple = future.get();
String instanceId = instanceStatusTuple.getInstanceId();
String status = instanceStatusTuple.getStatus();
String reason = null;
return new HealthCheckInstanceResponse(instanceId, reason, status);
} catch (Exception e) {
throw new RuntimeException(e);
}
})
.collect(Collectors.toList());
response.setInstanceResponse(healthCheckInstance);
log.info("Get statuses response: \n {}", response);
log.debug("getStatuses - END");
return response;
}
private class HealthCheckThread implements Callable<InstanceStatusTuple> {
private final HealthCheckInstance healthCheckInstance;
HealthCheckThread(HealthCheckInstance healthCheckInstance) {
this.healthCheckInstance = healthCheckInstance;
}
/**
* Approx 5 minutes thread
* If timeout method returns tuple with HeatStackId => Timeout
* @return InstanceStatusTuple
* @throws InterruptedException
* @throws BadResponseException
*/
@Override
public InstanceStatusTuple call() throws InterruptedException, BadResponseException {
log.info("{} started for: {}", Thread.currentThread().getName(), healthCheckInstance);
for (int retry = 0; retry < 30; retry++) {
K8sRbInstanceHealthCheck response = instanceApi.getInstanceHealthCheck(healthCheckInstance.getInstanceId(), healthCheckInstance.getHealthCheckInstance());
log.debug("Response for instanceId={}: {}", healthCheckInstance, response);
String status = response.getStatus();
if (!"RUNNING".equals(status.toUpperCase())) {
log.info("Poll status: {} for {}", status, healthCheckInstance);
instanceApi.deleteInstanceHealthCheck(healthCheckInstance.getInstanceId(), healthCheckInstance.getHealthCheckInstance());
return new InstanceStatusTuple(healthCheckInstance.getInstanceId(), status);
}
sleep(10_000L);
}
return new InstanceStatusTuple(healthCheckInstance.getInstanceId(), "Timeout");
}
}
private class InstanceStatusTuple {
private final String instanceId;
private final String status;
InstanceStatusTuple(String instanceId, String status) {
this.instanceId = instanceId;
this.status = status;
}
String getInstanceId() {
return instanceId;
}
String getStatus() {
return status;
}
}
}
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