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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.sdc.fe.impl;
import org.openecomp.sdc.common.api.Constants;
import org.openecomp.sdc.common.log.wrappers.Logger;
import org.openecomp.sdc.fe.config.Configuration;
import org.openecomp.sdc.fe.config.ConfigurationManager;
import javax.servlet.ServletContext;
import javax.ws.rs.core.Response;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
public class HealthCheckService {
private static final Logger healthLogger = Logger.getLogger("asdc.fe.healthcheck");
/**
* This executor will execute the health check task.
*/
private ScheduledExecutorService healthCheckExecutor =
Executors.newSingleThreadScheduledExecutor((Runnable r) -> new Thread(r, "FE-Health-Check-Thread"));
private final HealthCheckScheduledTask task ;
public HealthCheckService(ServletContext context) {
this.context = context;
this.task = new HealthCheckScheduledTask(this);
}
public Configuration getConfig(){
return ((ConfigurationManager) context.getAttribute(Constants.CONFIGURATION_MANAGER_ATTR))
.getConfiguration();
}
void setLastHealthStatus(HealthStatus lastHealthStatus) {
this.lastHealthStatus = lastHealthStatus;
}
private HealthStatus lastHealthStatus = new HealthStatus(500, "{}");
private ServletContext context;
public void start(int interval) {
this.healthCheckExecutor.scheduleAtFixedRate( getTask() , 0, interval, TimeUnit.SECONDS);
}
/**
* To be used by the HealthCheckServlet
*
* @return
*/
public Response getFeHealth() {
return this.buildResponse(lastHealthStatus);
}
private Response buildResponse(HealthStatus healthStatus) {
healthLogger.trace("FE and BE health check status: {}", healthStatus.getBody());
return Response.status(healthStatus.getStatusCode()).entity(healthStatus.getBody()).build();
}
public HealthStatus getLastHealthStatus() {
return lastHealthStatus;
}
public HealthCheckScheduledTask getTask() {
return task;
}
//immutable
static class HealthStatus {
public void setBody(String body) {
this.body = body;
}
public void setStatusCode(int statusCode) {
this.statusCode = statusCode;
}
private String body;
private int statusCode;
public HealthStatus(int code, String body) {
this.body = body;
this.statusCode = code;
}
public int getStatusCode() {
return statusCode;
}
public String getBody() {
return body;
}
}
}
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