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/*
* Copyright © 2016-2018 European Support 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 org.openecomp.sdc.logging.servlet;
import java.util.Objects;
import java.util.UUID;
import java.util.function.Consumer;
import java.util.function.Supplier;
import javax.servlet.http.HttpServletRequest;
import org.openecomp.sdc.logging.api.ContextData;
import org.openecomp.sdc.logging.api.LoggingContext;
/**
* Populates the context before a request is processed, and cleans it after the request has been processed.
*
* @author evitaliy
* @since 31 Jul 2018
*/
public class ContextTracker implements Tracker {
private final HttpHeader partnerNameHeaders;
private final HttpHeader requestIdHeaders;
private final Supplier<Void> loggingContextClear;
private final Consumer<ContextData> loggingContextPut;
/**
* Constructs tracker to handle required logging context in Servlet-based applications. Refer to ONAP logging guidelines for fields required to be
* put on logging context.
*
* @param partnerNameHeaders HTTP headers to check for a partner name, cannot be null
* @param requestIdHeaders HTTP headers to check for a request ID, cannot be null
*/
public ContextTracker(HttpHeader partnerNameHeaders, HttpHeader requestIdHeaders) {
this.partnerNameHeaders = Objects.requireNonNull(partnerNameHeaders);
this.requestIdHeaders = Objects.requireNonNull(requestIdHeaders);
this.loggingContextPut = LoggingContext::put;
this.loggingContextClear = () -> {
LoggingContext.clear();
return null;
};
}
/**
* Package level constructor used for tests. Clean and Put are passed as functions in order to avoid static mock and service loader config -
* LoggingServiceProvider in LoggingContext
*
* @param partnerNameHeaders
* @param requestIdHeaders
* @param loggingContextClear
* @param loggingContextPut
*/
ContextTracker(HttpHeader partnerNameHeaders, HttpHeader requestIdHeaders, Supplier<Void> loggingContextClear,
Consumer<ContextData> loggingContextPut) {
this.partnerNameHeaders = Objects.requireNonNull(partnerNameHeaders);
this.requestIdHeaders = Objects.requireNonNull(requestIdHeaders);
this.loggingContextPut = loggingContextPut;
this.loggingContextClear = loggingContextClear;
}
@Override
public void preRequest(HttpServletRequest request) {
loggingContextClear.get();
String serviceName = ServiceNameFormatter.format(request);
String requestId = requestIdHeaders.getAny(request::getHeader).orElse(UUID.randomUUID().toString());
ContextData.ContextDataBuilder contextBuilder = ContextData.builder().serviceName(serviceName).requestId(requestId);
String partnerName = partnerNameHeaders.getAny(request::getHeader).orElse("UNKNOWN");
contextBuilder.partnerName(partnerName);
loggingContextPut.accept(contextBuilder.build());
}
@Override
public void postRequest(RequestProcessingResult result) {
loggingContextClear.get();
}
}
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