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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.be.filters;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import org.openecomp.sdc.be.components.health.HealthCheckBusinessLogic;
import org.openecomp.sdc.be.dao.api.ActionStatus;
import org.openecomp.sdc.be.impl.ComponentsUtils;
import org.openecomp.sdc.be.impl.WebAppContextWrapper;
import org.openecomp.sdc.common.api.Constants;
import org.openecomp.sdc.common.api.HealthCheckInfo;
import org.openecomp.sdc.common.api.HealthCheckInfo.HealthCheckStatus;
import org.openecomp.sdc.exception.ResponseFormat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.context.WebApplicationContext;
import javax.annotation.Priority;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerRequestFilter;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.ResponseBuilder;
import javax.ws.rs.core.Response.Status;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
@Priority(11)
public class ComponentsAvailabilityFilter implements ContainerRequestFilter {
@Context
protected HttpServletRequest sr;
protected Gson gson = new GsonBuilder().setPrettyPrinting().create();
private static final Logger log = LoggerFactory.getLogger(ComponentsAvailabilityFilter.class);
@Override
public void filter(ContainerRequestContext requestContext) throws IOException {
String requestUrl = requestContext.getUriInfo().getPath();
if (!requestUrl.equals("healthCheck")) {
List<HealthCheckInfo> beHealthCheckInfos = getBeHealthCheckInfos(this.sr.getSession().getServletContext());
ActionStatus status = getAggregateBeStatus(beHealthCheckInfos);
if (!status.equals(ActionStatus.OK)) {
log.error("Components Availability Filter Failed - ES/Cassandra is DOWN");
availabilityError(requestContext);
}
}
}
protected ActionStatus getAggregateBeStatus(List<HealthCheckInfo> beHealthCheckInfos) {
ActionStatus status = ActionStatus.OK;
for (HealthCheckInfo healthCheckInfo : beHealthCheckInfos) {
if (healthCheckInfo.getHealthCheckStatus().equals(HealthCheckStatus.DOWN)) {
status = ActionStatus.GENERAL_ERROR;
break;
}
}
return status;
}
protected List<HealthCheckInfo> getBeHealthCheckInfos(ServletContext servletContext) {
List<HealthCheckInfo> healthCheckInfos = new ArrayList<HealthCheckInfo>();
HealthCheckBusinessLogic healthCheckBusinessLogic = getHealthCheckBL(servletContext);
healthCheckBusinessLogic.getTitanHealthCheck(healthCheckInfos); // Titan
return healthCheckInfos;
}
protected ComponentsUtils getComponentsUtils() {
ServletContext context = sr.getSession().getServletContext();
WebAppContextWrapper webApplicationContextWrapper = (WebAppContextWrapper) context.getAttribute(Constants.WEB_APPLICATION_CONTEXT_WRAPPER_ATTR);
WebApplicationContext webApplicationContext = webApplicationContextWrapper.getWebAppContext(context);
ComponentsUtils componentsUtils = webApplicationContext.getBean(ComponentsUtils.class);
return componentsUtils;
}
protected void availabilityError(ContainerRequestContext requestContext) {
ComponentsUtils componentUtils = getComponentsUtils();
if (componentUtils == null) {
log.error("Components Availability Filter Failed to get component utils.");
requestContext.abortWith(Response.status(Status.INTERNAL_SERVER_ERROR).build());
}
ResponseFormat responseFormat = getComponentsUtils().getResponseFormat(ActionStatus.GENERAL_ERROR);
ResponseBuilder responseBuilder = Response.status(responseFormat.getStatus());
Response response = responseBuilder.entity(gson.toJson(responseFormat.getRequestError())).build();
requestContext.abortWith(response);
}
private HealthCheckBusinessLogic getHealthCheckBL(ServletContext context) {
WebAppContextWrapper webApplicationContextWrapper = (WebAppContextWrapper) context.getAttribute(Constants.WEB_APPLICATION_CONTEXT_WRAPPER_ATTR);
WebApplicationContext webApplicationContext = webApplicationContextWrapper.getWebAppContext(context);
HealthCheckBusinessLogic healthCheckBl = webApplicationContext.getBean(HealthCheckBusinessLogic.class);
return healthCheckBl;
}
}
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