better tracking and reporting of snapshot generation issues

org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/ContextUtilities.java

@@ -271,6 +271,7 @@ public class ContextUtilities implements ProfileKnowledgeProvider {
         throw new FHIRException(context.formatMessage(I18nConstants.PROFILE___ERROR_GENERATING_SNAPSHOT, p.getName(), p.getUrl()));
       pu = null;
     }
+    p.setGeneratedSnapshot(true);
   }
   
 

org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/IWorkerContext.java

@@ -705,6 +705,7 @@ public interface IWorkerContext {
     }
     public void logMessage(String message); // status messages, always display
     public void logDebugMessage(LogCategory category, String message); // verbose; only when debugging 
+    public boolean isDebugLogging(); // whether to log debug information
   }
   public void setLogger(@Nonnull ILoggingService logger);
   public ILoggingService getLogger();

org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/SimpleWorkerContext.java

@@ -670,11 +670,27 @@ public class SimpleWorkerContext extends BaseWorkerContext implements IWorkerCon
     T r = super.fetchResource(class_, uri, source);
     if (r instanceof StructureDefinition) {
       StructureDefinition p = (StructureDefinition)r;
-      try {
-        new ContextUtilities(this).generateSnapshot(p);
-      } catch (Exception e) {
-        // not sure what to do in this case?
-        System.out.println("Unable to generate snapshot for "+uri+": "+e.getMessage());
+      if (!p.isGeneratedSnapshot()) {
+        if (p.isGeneratingSnapshot()) {
+          throw new FHIRException("Attempt to fetch the profile "+p.getVersionedUrl()+" while generating the snapshot for it");
+        }
+        try {
+          if (logger.isDebugLogging()) {
+            System.out.println("Generating snapshot for "+p.getVersionedUrl());
+          }
+          p.setGeneratingSnapshot(true);
+          try {
+            new ContextUtilities(this).generateSnapshot(p);
+          } finally {
+            p.setGeneratingSnapshot(false);      
+          }
+        } catch (Exception e) {
+          // not sure what to do in this case?
+          System.out.println("Unable to generate snapshot for "+p.getVersionedUrl()+": "+e.getMessage());
+          if (logger.isDebugLogging()) {
+            e.printStackTrace();
+          }
+        }
       }
     }
     return r;

org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/SystemOutLoggingService.java

@@ -19,7 +19,13 @@ public class SystemOutLoggingService implements IWorkerContext.ILoggingService {
   @Override
   public void logDebugMessage(LogCategory category, String message) {
     if (debug) {
-        System.out.println(" -" + category.name().toLowerCase() + ": " + message);
-      }
+      System.out.println(" -" + category.name().toLowerCase() + ": " + message);
     }
+  }
+
+  @Override
+  public boolean isDebugLogging() {
+    return debug;
+  }  
+  
 }

org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/model/Base.java

@@ -124,6 +124,7 @@ public abstract class Base implements Serializable, IBase, IElement {
     if (userData != null)
       userData.remove(name);
   }
+ 
   
   public void setUserDataINN(String name, Object value) {
     if (value == null)

org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/model/StructureDefinition.java

@@ -5179,9 +5179,27 @@ public class StructureDefinition extends CanonicalResource {
     } else { 
       return getType(); 
     } 
-  } 
+  }
 
+  private boolean generatedSnapshot;
+  private boolean generatingSnapshot;
 
+  public boolean isGeneratedSnapshot() {
+    return generatedSnapshot;
+  }
+
+  public void setGeneratedSnapshot(boolean generatedSnapshot) {
+    this.generatedSnapshot = generatedSnapshot;
+  }
+
+  public boolean isGeneratingSnapshot() {
+    return generatingSnapshot;
+  }
+
+  public void setGeneratingSnapshot(boolean generatingSnapshot) {
+    this.generatingSnapshot = generatingSnapshot;
+  }
+  
 // end addition
 
 }

pom.xml

@@ -19,7 +19,7 @@
 
     <properties>
         <hapi_fhir_version>6.2.1</hapi_fhir_version>
-        <validator_test_case_version>1.2.6</validator_test_case_version>
+        <validator_test_case_version>1.2.7-SNAPSHOT</validator_test_case_version>
         <junit_jupiter_version>5.7.1</junit_jupiter_version>
         <junit_platform_launcher_version>1.8.2</junit_platform_launcher_version>
         <maven_surefire_version>3.0.0-M5</maven_surefire_version>