SimpleStringCodec.java

/**
 * A very simple {@link Injector} and {@link Extractor} that use a {@link StringBuffer} as the transmission.
 * This class <b>will only</b> transmit the {@link io.opentracing.SpanContext} without any baggage
 * (that's why its simple).
 */
public class SimpleStringCodec implements Injector<StringBuffer> , Extractor<StringBuffer> {

    @Override
    public void inject(SpanContext spanContext, StringBuffer carrier) {
        carrier.append(spanContext.contextAsString());
    }

    @Override
    public SpanContext extract(StringBuffer carrier) {
        return SpanContext.contextFromString(carrier.toString());
    }

}