/*
* Copyright 2014-2016 Groupon, Inc
* Copyright 2014-2016 The Billing Project, LLC
*
* The Billing Project licenses this file to you 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.killbill.billing.server.filters;
import java.io.IOException;
import java.io.OutputStream;
import java.util.List;
import javax.ws.rs.core.HttpHeaders;
import org.killbill.billing.util.UUIDs;
import org.killbill.commons.request.Request;
import org.killbill.commons.request.RequestData;
import com.google.inject.Singleton;
import com.sun.jersey.spi.container.ContainerRequest;
import com.sun.jersey.spi.container.ContainerRequestFilter;
import com.sun.jersey.spi.container.ContainerResponse;
import com.sun.jersey.spi.container.ContainerResponseFilter;
import com.sun.jersey.spi.container.ContainerResponseWriter;
@Singleton
public class RequestDataFilter implements ContainerRequestFilter, ContainerResponseFilter {
private static final String REQUEST_ID_HEADER = "X-Request-Id";
private static final String LEGACY_REQUEST_ID_HEADER = "X-Killbill-Request-Id-Req";
@Override
public ContainerRequest filter(final ContainerRequest request) {
final List<String> requestIdHeaderRequests = getRequestId(request);
final String requestId = (requestIdHeaderRequests == null || requestIdHeaderRequests.isEmpty()) ? UUIDs.randomUUID().toString() : requestIdHeaderRequests.get(0);
Request.setPerThreadRequestData(new RequestData(requestId));
return request;
}
@Override
public ContainerResponse filter(final ContainerRequest request, final ContainerResponse response) {
response.setContainerResponseWriter(new Adapter(response.getContainerResponseWriter()));
return response;
}
private List<String> getRequestId(final HttpHeaders requestHeaders) {
List<String> requestIds = requestHeaders.getRequestHeader(REQUEST_ID_HEADER);
if (requestIds == null || requestIds.isEmpty()) {
requestIds = requestHeaders.getRequestHeader(LEGACY_REQUEST_ID_HEADER);
}
return requestIds;
}
private static final class Adapter implements ContainerResponseWriter {
private final ContainerResponseWriter crw;
Adapter(final ContainerResponseWriter containerResponseWriter) {
this.crw = containerResponseWriter;
}
@Override
public OutputStream writeStatusAndHeaders(final long contentLength, final ContainerResponse response) throws IOException {
return crw.writeStatusAndHeaders(contentLength, response);
}
@Override
public void finish() throws IOException {
crw.finish();
// Reset the per-thread RequestData last
Request.resetPerThreadRequestData();
}
}
}