What’s more elegant

Optional<Header> resultcode = Arrays.stream(response.getAllHeaders())
         .filter(h -> "X-Header-Result".equals(h.getName()))
         .findFirst();
 
return resultcode.isPresent() ? resultcode.get().getValue() : "";

Or

String resultcode = Arrays.stream(response.getAllHeaders())
         .filter(h -> "X-Header-Result".equals(h.getName()))
         .findFirst().map(NameValuePair::getValue)
         .orElse("");
 
return resultcode;

Note to self:
If getMessages() results in null, the following will cause an NPE:

Object messages = getMessages().stream().anyThing.

The following won’t:

Object messages = Streams.stream(getMessages()).anyThing.

// debug purposes: to inspect unknown objects at runtime
static void inspect(Object obj) {
    try {
        for (Field f : obj.getClass().getDeclaredFields()) {
            f.setAccessible(true);
            System.out.printf("%s %s %s %s%n",
                    Modifier.toString(f.getModifiers()),
                    f.getType().getSimpleName(),
                    f.getName(),
                    f.get(obj)
            );
            if ("Object[]".equals(f.getType().getSimpleName())) {
                LOG.warn("further inspect object " + f.get(obj));
            }
            if ("int".equals(f.getType().getSimpleName())) {
                LOG.warn("expected size " + f.get(obj));
            }
            if ("List".equals(f.getType().getSimpleName())) {
                List<Object> objects = (List<Object>)(List<?>) f.get(obj);
                for (Object o : objects) {
                    inspect(o);
                }
            }
        }
    } catch (IllegalAccessException iae) {
        System.out.println("IllegalAccessException : " + iae.getMessage());
    }
}

Show last commit comment first:
git log –name-status HEAD^..HEAD

Then, remove the last commit and push:
git reset –hard HEAD~1

See also: https://git-scm.com/book/en/v2/Git-Tools-Rewriting-History

ActiveMQ Illegal character +0x16 HttpChannelOverHttp {\x16<<<\x03\x01\x00\xD6\x01\x00\x00\xD2\x03\x03\xDd#\x13\xBb\xA3…\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00}

Reason is, you’re listening HTTP on an HTTPS port. Unfortunately restarting the ActiveMQ won’t help.

For me, what helped was:

1. stop the ActiveMQ
2. clear the maps in the map “..\activemq\data\tmp”
3. clear the files in the map “..\activemq\data\kahadb”