Allow App To Choose Between MsgResponse Sinks

- MZS Schema Change: Add "MsgResponseSinks" element to
  mzs:DeliveryRequest/Config that allows sender to configure how
  MsgResponses should be archived.
- ConfigUtil: Interpret MsgResponseSink parameters from Spring
  Environment and merge with ConfigType.
- MsgResponseBackend: Send responses to sinks according to
  MsgResponseSinks in Config
- application.yaml: Add MsgResponseSinks parameter to configuration.
- Uncouple Sink implementations from java.util.function.Function,
  because the sink interfaces are going to differ and there is no need
  to unite them under one interface.
- Add and test LogResponseSink, which logs responses to it's logger.
- MsgResponse: Add JAXB getter for response. Reason: Can be passed to
  marshaller.

1 files changed, 10 insertions, 4 deletions

diff --git a/src/main/java/at/gv/egiz/moazs/backend/SaveResponseToFileSink.java b/src/main/java/at/gv/egiz/moazs/backend/SaveResponseToFileSink.java
index 02771a9..7da76ef 100644
--- a/src/main/java/at/gv/egiz/moazs/backend/SaveResponseToFileSink.java
+++ b/src/main/java/at/gv/egiz/moazs/backend/SaveResponseToFileSink.java
@@ -15,7 +15,6 @@ import java.nio.charset.StandardCharsets;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.concurrent.CompletableFuture;
-import java.util.function.Function;
 
 import static at.gv.egiz.moazs.MoaZSException.moaZSException;
 import static java.lang.String.format;
@@ -23,10 +22,11 @@ import static java.util.concurrent.CompletableFuture.allOf;
 import static java.util.concurrent.CompletableFuture.supplyAsync;
 
 @Component
-public class SaveResponseToFileSink implements Function<MsgResponse, CompletableFuture<Void>> {
+public class SaveResponseToFileSink {
 
     private static final Logger log = LoggerFactory.getLogger(SaveResponseToFileSink.class);
     private static final String SAVING_FAILED_MSG = "Could not save response with AppDeliveryId=%s.";
+    private static final String SAVE_RESPONSE_MSG = "Saving response to {}..." ;
 
     private final SimpleDateFormat isoFormatter;
     private final Marshaller msgMarshaller;
@@ -41,8 +41,13 @@ public class SaveResponseToFileSink implements Function<MsgResponse, Completable
         this.isoFormatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
     }
 
-    @Override
-    public CompletableFuture<Void> apply(MsgResponse response) {
+    /**
+     * Save response and it's binary version to the file system.
+     *
+     * @param response
+     * @return Future that completes when both responses have been written to the file system.
+     */
+    public CompletableFuture<Void> save(MsgResponse response) {
 
         var responseID = response.getResponseID();
 
@@ -79,6 +84,7 @@ public class SaveResponseToFileSink implements Function<MsgResponse, Completable
     }
 
     private void storeToFile(String path, byte[] content) {
+        log.trace(SAVE_RESPONSE_MSG, path);
         try {
             FileUtils.writeByteArrayToFile(new File(path), content);
         } catch (IOException e) {