com.github.kristofa.brave.CommonSpanState Maven / Gradle / Ivy

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package com.github.kristofa.brave;

/**
 * Keeps track of common trace/span state information.
 * 
 * Should be thread aware since we can have multiple parallel request which means multiple trace/spans.
 * 
 * 
 * @author kristof
 */
public interface CommonSpanState {

    /**
     * Indicates if we should sample current request.
     * 
     * Should be thread-aware to support multiple parallel requests.
     * 
     * @return null in case there is no indication if we should sample or not. true in case we got
     *         the indication we should sample current request, false in case we should not sample the current
     *         request.
     */
    Boolean sample();
}