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package org.openecomp.sdc.fe.servlets;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import org.openecomp.sdc.common.api.Constants;
import org.openecomp.sdc.common.servlets.BasicServlet;
import org.openecomp.sdc.fe.mdc.MdcData;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.core.Response;
import java.util.concurrent.TimeUnit;
public abstract class LoggingServlet extends BasicServlet {
private static final Logger log = LoggerFactory.getLogger(BasicServlet.class.getName());
private static final Cache<String, MdcData> mdcDataCache = CacheBuilder.newBuilder().expireAfterWrite(10, TimeUnit.SECONDS).build();
/**
* log incoming requests
* @param httpRequest the http request
*/
protected void logFeRequest(HttpServletRequest httpRequest) {
MDC.clear();
Long transactionStartTime = System.currentTimeMillis();
String uuid = httpRequest.getHeader(Constants.X_ECOMP_REQUEST_ID_HEADER);
String serviceInstanceID = httpRequest.getHeader(Constants.X_ECOMP_SERVICE_ID_HEADER);
if (uuid != null && uuid.length() > 0) {
String userId = httpRequest.getHeader(Constants.USER_ID_HEADER);
String remoteAddr = httpRequest.getRemoteAddr();
String localAddr = httpRequest.getLocalAddr();
mdcDataCache.put(uuid, new MdcData(serviceInstanceID, userId, remoteAddr, localAddr, transactionStartTime));
updateMdc(uuid, serviceInstanceID, userId, remoteAddr, localAddr, null);
}
inHttpRequest(httpRequest);
}
/**
* log response
* @param request orig request
* @param response returned response
*/
protected void logFeResponse(HttpServletRequest request, Response response) {
String uuid = request.getHeader(Constants.X_ECOMP_REQUEST_ID_HEADER);
String transactionRoundTime = null;
if (uuid != null) {
MdcData mdcData = mdcDataCache.getIfPresent(uuid);
if (mdcData != null) {
Long transactionStartTime = mdcData.getTransactionStartTime();
if (transactionStartTime != null) {// should'n ever be null, but
// just to be defensive
transactionRoundTime = Long.toString(System.currentTimeMillis() - transactionStartTime);
}
updateMdc(uuid, mdcData.getServiceInstanceID(), mdcData.getUserId(), mdcData.getRemoteAddr(), mdcData.getLocalAddr(), transactionRoundTime);
}
}
outHttpResponse(response);
MDC.clear();
}
/**
* Extracted for purpose of clear method name, for logback %M parameter
* @param httpRequest http request
*/
protected abstract void inHttpRequest(HttpServletRequest httpRequest) ;
/**
* Extracted for purpose of clear method name, for logback %M parameter
* @param response http response
*/
protected abstract void outHttpResponse(Response response);
/**
* update mdc with values from the request
* @param uuid service uuid
* @param serviceInstanceID serviceInstanceID
* @param userId userId
* @param remoteAddr remoteAddr
* @param localAddr localAddr
* @param transactionStartTime transactionStartTime
*/
private void updateMdc(String uuid, String serviceInstanceID, String userId, String remoteAddr, String localAddr, String transactionStartTime) {
MDC.put("uuid", uuid);
MDC.put("serviceInstanceID", serviceInstanceID);
MDC.put("userId", userId);
MDC.put("remoteAddr", remoteAddr);
MDC.put("localAddr", localAddr);
MDC.put("timer", transactionStartTime);
}
}
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