add a bare bones observation resource

src/main/java/org/uksrc/archive/ObservationResource.java

@@ -0,0 +1,35 @@
+package org.uksrc.archive;
+/*
+ * Created on 21/08/2024 by Paul Harrison ([email protected]).
+ */
+
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.PersistenceContext;
+import jakarta.transaction.Transactional;
+import jakarta.ws.rs.Consumes;
+import jakarta.ws.rs.POST;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.Produces;
+import jakarta.ws.rs.core.MediaType;
+import org.eclipse.microprofile.openapi.annotations.Operation;
+import org.ivoa.dm.caom2.caom2.Observation;
+
+
+@Produces(MediaType.APPLICATION_JSON)
+@Path("/observation")
+public class ObservationResource {
+
+
+    @PersistenceContext
+    protected EntityManager em;  // exists for the application lifetime no need to close
+
+    @POST
+    @Operation(summary = "create a new Observation")
+    @Consumes(MediaType.APPLICATION_JSON)
+    @Transactional
+    public Observation addObservation(Observation observation) {
+        em.persist(observation);
+        return observation;
+    }
+
+}