org.elasticsearch.http.HttpTracer Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.http;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.message.ParameterizedMessage;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.settings.ClusterSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.RestResponse;
import org.elasticsearch.tasks.Task;
import org.elasticsearch.transport.TransportService;
import java.util.List;
/**
* Http request trace logger. See {@link #maybeTraceRequest(RestRequest, Exception)} for details.
*/
class HttpTracer {
private final Logger logger = LogManager.getLogger(HttpTracer.class);
private volatile String[] tracerLogInclude;
private volatile String[] tracerLogExclude;
HttpTracer(Settings settings, ClusterSettings clusterSettings) {
setTracerLogInclude(HttpTransportSettings.SETTING_HTTP_TRACE_LOG_INCLUDE.get(settings));
setTracerLogExclude(HttpTransportSettings.SETTING_HTTP_TRACE_LOG_EXCLUDE.get(settings));
clusterSettings.addSettingsUpdateConsumer(HttpTransportSettings.SETTING_HTTP_TRACE_LOG_INCLUDE, this::setTracerLogInclude);
clusterSettings.addSettingsUpdateConsumer(HttpTransportSettings.SETTING_HTTP_TRACE_LOG_EXCLUDE, this::setTracerLogExclude);
}
/**
* Logs the given request if request tracing is enabled and the request uri matches the current include and exclude patterns defined
* in {@link HttpTransportSettings#SETTING_HTTP_TRACE_LOG_INCLUDE} and {@link HttpTransportSettings#SETTING_HTTP_TRACE_LOG_EXCLUDE}.
* If the request was logged returns a logger to log sending the response with or {@code null} otherwise.
*
* @param restRequest Rest request to trace
* @param e Exception when handling the request or {@code null} if none
* @return This instance to use for logging the response via {@link #traceResponse} to this request if it was logged or
* {@code null} if the request wasn't logged
*/
@Nullable
HttpTracer maybeTraceRequest(RestRequest restRequest, @Nullable Exception e) {
if (logger.isTraceEnabled() && TransportService.shouldTraceAction(restRequest.uri(), tracerLogInclude, tracerLogExclude)) {
logger.trace(new ParameterizedMessage("[{}][{}][{}][{}] received request from [{}]", restRequest.getRequestId(),
restRequest.header(Task.X_OPAQUE_ID), restRequest.method(), restRequest.uri(), restRequest.getHttpChannel()), e);
return this;
}
return null;
}
/**
* Logs the response to a request that was logged by {@link #maybeTraceRequest(RestRequest, Exception)}.
*
* @param restResponse RestResponse
* @param httpChannel HttpChannel the response was sent on
* @param contentLength Value of the response content length header
* @param opaqueHeader Value of HTTP header {@link Task#X_OPAQUE_ID}
* @param requestId Request id as returned by {@link RestRequest#getRequestId()}
* @param success Whether the response was successfully sent
*/
void traceResponse(RestResponse restResponse, HttpChannel httpChannel, String contentLength, String opaqueHeader, long requestId,
boolean success) {
logger.trace(new ParameterizedMessage("[{}][{}][{}][{}][{}] sent response to [{}] success [{}]", requestId,
opaqueHeader, restResponse.status(), restResponse.contentType(), contentLength, httpChannel, success));
}
private void setTracerLogInclude(List tracerLogInclude) {
this.tracerLogInclude = tracerLogInclude.toArray(Strings.EMPTY_ARRAY);
}
private void setTracerLogExclude(List tracerLogExclude) {
this.tracerLogExclude = tracerLogExclude.toArray(Strings.EMPTY_ARRAY);
}
}