Java Money API

JMoneyTracer.java

package com.comcast.money.japi;

import com.comcast.money.core.Money$;
import com.comcast.money.core.Note;
import com.comcast.money.core.Result;
import com.comcast.money.core.StringNote;
import com.comcast.money.core.Tracer;

public class JMoneyTracer {
    private static Tracer tracer() {
        return Money$.MODULE$.tracer();
    }
    
    public static TraceSpan startSpan(String spanName) {
        Tracer tracer = tracer();
        tracer.startSpan(spanName);
        
        return new TraceSpan() {
            private boolean result = false;
            private boolean stopped = false;
            
            @Override public void succeeded() {
                result = true;
            }
            
            @Override public <T> T succeeded(T value) {
                result = true;
                return value;
            }
            
            @Override public void failed() {
                result = false;
            }
            
            @Override public void close() {
                if (!stopped) {
                    stopped = true;
                    tracer.stopSpan(result ? Result.success() : Result.failed());
                }
            }
        };
    }
    
    public <T, E extends Exception> T trace(String spanName, CheckedCallable<T, E> action) throws E {

        try (TraceSpan span = startSpan(spanName)) {
            return span.succeeded(action.call());
        }
    }
    
    public <E extends Exception> void trace(String spanName, CheckedRunnable<E> action) throws E {

        try (TracedSpan span = startSpan(spanName)) {
            action.run();
            span.succeeded();
        }
    }
}

public interface TraceSpan extends AutoCloseable {
    @Override void close();
    void succeeded();
    <T> T succeeded(T value);
    void failed();
}

@FunctionalInterface
public interface CheckedCallable<V, E extends Exception> {
    V call() throws E;
}

@FunctionalInterface
public interface CheckedRunnable<E extends Exception> {
    void run() throws E;
}