Since Java 8, Java has introduced various @FunctionalInterface interfaces to support functional programming. Generally, Java functions will be executed in a ForkJoinPool. If some thread variables of Tracer are not passed in, it will cause the loss of Trace information.
Therefore, in SOFATracer XXX version, a series of wrapper classes for these @FunctionalInterface interfaces has been added to ensure that trace-related information can be transferred correctly and transparently. The following is an example of the Consumer interface, just need to change the construction of Consumer to SofaTracerConsumer, and pass the original Consumer as the parameter of the constructor of SofaTracerConsumer:
Consumer<String> consumer = new SofaTracerConsumer<>(System.out::println);
All wrapped classes are in the https://github.com/sofastack/sofa-tracer/tree/master/tracer-core/src/main/java/com/alipay/common/tracer/core/async directory.