@Override
    public ExternalStorageLocation getLocation(
            Operation operation, PayloadType payloadType, String path) {
        ExternalStorageLocation location = new ExternalStorageLocation();
        location.setPath(UUID.randomUUID() + ".json");
        return location;
    }
A {@link ExternalPayloadStorage} implementation that stores payload in file.
test-harness/src/test/java/com/netflix/conductor/test/utils/MockExternalPayloadStorage.java