/*
* Copyright 2013, The Sporting Exchange Limited
*
* 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.betfair.cougar.health;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import com.betfair.cougar.core.api.ev.TimeConstraints;
import com.betfair.cougar.core.impl.DefaultTimeConstraints;
import com.betfair.tornjak.monitor.service.InOutServiceMonitor;
import org.springframework.jmx.export.annotation.ManagedAttribute;
import org.springframework.jmx.export.annotation.ManagedResource;
import com.betfair.cougar.api.ContainerContext;
import com.betfair.cougar.api.RequestContext;
import com.betfair.cougar.api.ResponseCode;
import com.betfair.cougar.health.service.v3.HealthService;
import com.betfair.cougar.health.service.v3.enumerations.HealthExceptionErrorCodeEnum;
import com.betfair.cougar.health.service.v3.enumerations.HealthStatus;
import com.betfair.cougar.health.service.v3.enumerations.RestrictedHealthStatus;
import com.betfair.cougar.health.service.v3.exception.HealthException;
import com.betfair.cougar.health.service.v3.to.HealthDetailResponse;
import com.betfair.cougar.health.service.v3.to.HealthSummaryResponse;
import com.betfair.cougar.health.service.v3.to.SubComponentStatus;
import com.betfair.cougar.logging.CougarLogger;
import com.betfair.cougar.logging.CougarLoggingUtils;
import com.betfair.tornjak.monitor.Monitor;
import com.betfair.tornjak.monitor.MonitorRegistry;
import com.betfair.tornjak.monitor.Status;
import com.betfair.tornjak.monitor.StatusAggregator;
@ManagedResource
public class HealthServiceImpl implements HealthService {
final static CougarLogger logger = CougarLoggingUtils.getLogger(HealthServiceImpl.class);
private MonitorRegistry monitorRegistry;
@Override
public void init(ContainerContext cc) {
this.monitorRegistry = cc.getMonitorRegistry();
}
@Override
public HealthSummaryResponse isHealthy(final RequestContext ctx, TimeConstraints timeConstraints) throws HealthException {
HealthSummaryResponse response = new HealthSummaryResponse();
if (isSystemInService()) {
response.setHealthy(getHealth());
} else {
response.setHealthy(RestrictedHealthStatus.FAIL);
}
return response;
}
private RestrictedHealthStatus getHealth() throws HealthException {
RestrictedHealthStatus currentState = RestrictedHealthStatus.OK;
if (monitorRegistry == null) {
logger.log(Level.SEVERE, "MonitorRegistry is null");
throw new HealthException(ResponseCode.InternalError, HealthExceptionErrorCodeEnum.NULL);
}
StatusAggregator agg = monitorRegistry.getStatusAggregator();
if (agg == null) {
logger.log(Level.SEVERE, "StatusAggregator is null");
throw new HealthException(ResponseCode.InternalError, HealthExceptionErrorCodeEnum.NULL);
}
Status status = agg.getStatus();
if (status == null) {
logger.log(Level.SEVERE, "Status is null");
throw new HealthException(ResponseCode.InternalError, HealthExceptionErrorCodeEnum.NULL);
}
if (status.equals(Status.FAIL)) {
currentState = RestrictedHealthStatus.FAIL;
}
return currentState;
}
@Override
public HealthDetailResponse getDetailedHealthStatus(RequestContext reqCtx, TimeConstraints timeConstraints) throws HealthException {
HealthDetailResponse detail = new HealthDetailResponse();
List<SubComponentStatus> subStatuses = new ArrayList<>();
for (Monitor m : monitorRegistry.getMonitorSet()) {
SubComponentStatus scs = new SubComponentStatus();
scs.setName(m.getName());
Status monitorStatus = m.getStatus();
scs.setStatus(getHealthStatus(monitorStatus));
subStatuses.add(scs);
}
detail.setSubComponentList(subStatuses);
if (!isSystemInService()) {
detail.setHealth(HealthStatus.OUT_OF_SERVICE);
} else {
detail.setHealth(getHealthStatus(monitorRegistry.getStatusAggregator().getStatus()));
}
return detail;
}
private HealthStatus getHealthStatus(Status status) {
switch (status) {
case OK:
case WARN:
case FAIL:
return HealthStatus.valueOf(status.name());
}
throw new IllegalArgumentException("Cannot convert Status."+status+" to a HealthStatus");
}
@ManagedAttribute
public boolean isSystemInService() {
for (Monitor m : monitorRegistry.getMonitorSet()) {
if (m instanceof InOutServiceMonitor) {
return ((InOutServiceMonitor)m).isInService();
}
}
return true;
}
@ManagedAttribute
public boolean isSystemHealthy() {
try {
HealthStatus status = getDetailedHealthStatus(null, DefaultTimeConstraints.NO_CONSTRAINTS).getHealth();
return status == HealthStatus.OK || status == HealthStatus.WARN;
} catch (HealthException e) {
return false;
}
}
}