fix(maven): Improved maven plugin output on failure

app/src/main/java/io/apicurio/registry/services/http/CoreRegistryExceptionMapperService.java

@@ -81,19 +81,21 @@ private ProblemDetails toProblemDetails(Throwable t, int code) {
         if (t instanceof RuleViolationException) {
             RuleViolationException rve = (RuleViolationException) t;
             details = new RuleViolationProblemDetails();
+            ((RuleViolationProblemDetails) details).setTitle(rve.getMessage());
+            ((RuleViolationProblemDetails) details).setDetail(rve.getDetailMessage());
             ((RuleViolationProblemDetails) details).setCauses(toRestCauses(rve.getCauses()));
         } else {
             details = new ProblemDetails();
+            details.setTitle(t.getLocalizedMessage());
+            if (includeStackTrace) {
+                details.setDetail(getStackTrace(t));
+            } else {
+                details.setDetail(getRootMessage(t));
+            }
         }
 
         details.setStatus(code);
-        details.setTitle(t.getLocalizedMessage());
         details.setName(t.getClass().getSimpleName());
-        if (includeStackTrace) {
-            details.setDetail(getStackTrace(t));
-        } else {
-            details.setDetail(getRootMessage(t));
-        }
         return details;
     }
 

schema-util/common/src/main/java/io/apicurio/registry/rules/RuleViolationException.java

@@ -73,8 +73,7 @@ public RuleViolationException(String message, RuleType ruleType, String ruleConf
         this.causes = causes;
     }
 
-    @Override
-    public String getMessage() {
+    public String getDetailMessage() {
         return super.getMessage() + causes.stream().map(rv -> rv.getDescription()
                 + (rv.getContext() != null && !rv.getContext().isBlank() ? " at " + rv.getContext() : ""))
                 .reduce((left, right) -> left + ", " + right).map(s -> " Causes: " + s).orElse("");

utils/maven-plugin/src/main/java/io/apicurio/registry/maven/AbstractRegistryMojo.java

@@ -1,7 +1,10 @@
 package io.apicurio.registry.maven;
 
+import com.microsoft.kiota.ApiException;
 import io.apicurio.registry.client.auth.VertXAuthFactory;
 import io.apicurio.registry.rest.client.RegistryClient;
+import io.apicurio.registry.rest.client.models.ProblemDetails;
+import io.apicurio.registry.rest.client.models.RuleViolationProblemDetails;
 import io.apicurio.registry.types.ContentTypes;
 import io.kiota.http.vertx.VertXRequestAdapter;
 import io.vertx.core.Vertx;
@@ -141,4 +144,37 @@ public void setUsername(String username) {
     public void setPassword(String password) {
         this.password = password;
     }
+
+    protected void logAndThrow(ApiException e) throws MojoExecutionException, MojoFailureException {
+        if (e instanceof RuleViolationProblemDetails) {
+            logAndThrow((RuleViolationProblemDetails) e);
+        }
+        if (e instanceof ProblemDetails) {
+            logAndThrow((ProblemDetails) e);
+        }
+    }
+
+    protected void logAndThrow(ProblemDetails e) throws MojoExecutionException {
+        getLog().error("---");
+        getLog().error("Error registering artifact: " + e.getName());
+        getLog().error(e.getTitle());
+        getLog().error(e.getDetail());
+        getLog().error("---");
+        throw new MojoExecutionException("Error registering artifact: " + e.getName(), e);
+    }
+
+    protected void logAndThrow(RuleViolationProblemDetails e) throws MojoFailureException {
+        getLog().error("---");
+        getLog().error("Registry rule validation failure: " + e.getName());
+        getLog().error(e.getTitle());
+        if (e.getCauses() != null) {
+            e.getCauses().forEach(cause -> {
+                getLog().error("\t-> " + cause.getContext());
+                getLog().error("\t   " + cause.getDescription());
+            });
+        }
+        getLog().error("---");
+        throw new MojoFailureException("Registry rule validation failure: " + e.getName(), e);
+    }
+
 }

utils/maven-plugin/src/main/java/io/apicurio/registry/maven/RegisterRegistryMojo.java

@@ -15,6 +15,7 @@
 import io.apicurio.registry.rest.client.models.CreateVersion;
 import io.apicurio.registry.rest.client.models.IfArtifactExists;
 import io.apicurio.registry.rest.client.models.ProblemDetails;
+import io.apicurio.registry.rest.client.models.RuleViolationProblemDetails;
 import io.apicurio.registry.rest.client.models.VersionContent;
 import io.apicurio.registry.rest.client.models.VersionMetaData;
 import io.apicurio.registry.types.ArtifactType;
@@ -25,6 +26,7 @@
 import org.apache.avro.Schema;
 import org.apache.commons.io.FileUtils;
 import org.apache.maven.plugin.MojoExecutionException;
+import org.apache.maven.plugin.MojoFailureException;
 import org.apache.maven.plugins.annotations.Mojo;
 import org.apache.maven.plugins.annotations.Parameter;
 
@@ -54,7 +56,7 @@ public class RegisterRegistryMojo extends AbstractRegistryMojo {
     /**
      * The list of pre-registered artifacts that can be used as references.
      */
-    @Parameter(required = true)
+    @Parameter(required = false)
     List<ExistingReference> existingReferences;
 
     /**
@@ -69,6 +71,13 @@ public class RegisterRegistryMojo extends AbstractRegistryMojo {
     @Parameter(property = "skipRegister", defaultValue = "false")
     boolean skip;
 
+    /**
+     * Set this to 'true' to perform the action with the "dryRun" option enabled. This will effectively test
+     * whether registration *would have worked*. But it results in no changes made on the server.
+     */
+    @Parameter(property = "dryRun", defaultValue = "false")
+    boolean dryRun;
+
     DefaultArtifactTypeUtilProviderImpl utilProviderFactory = new DefaultArtifactTypeUtilProviderImpl();
 
     /**
@@ -85,6 +94,10 @@ protected boolean validate() throws MojoExecutionException {
             return false;
         }
 
+        if (existingReferences == null) {
+            existingReferences = new ArrayList<>();
+        }
+
         int idx = 0;
         int errorCount = 0;
         for (RegisterArtifact artifact : artifacts) {
@@ -182,8 +195,8 @@ protected void executeInternal() throws MojoExecutionException {
     }
 
     private VersionMetaData registerWithAutoRefs(RegistryClient registryClient, RegisterArtifact artifact,
-            ReferenceIndex index, Stack<RegisterArtifact> registrationStack)
-            throws IOException, ExecutionException, InterruptedException {
+            ReferenceIndex index, Stack<RegisterArtifact> registrationStack) throws IOException,
+            ExecutionException, InterruptedException, MojoExecutionException, MojoFailureException {
         if (loopDetected(artifact, registrationStack)) {
             throw new RuntimeException(
                     "Artifact reference loop detected (not supported): " + printLoop(registrationStack));
@@ -203,7 +216,8 @@ private VersionMetaData registerWithAutoRefs(RegistryClient registryClient, Regi
                 .findExternalReferences(typedArtifactContent);
 
         // Register all of the references first, then register the artifact.
-        List<ArtifactReference> registeredReferences = externalReferences.stream().map(externalRef -> {
+        List<ArtifactReference> registeredReferences = new ArrayList<>(externalReferences.size());
+        for (ExternalReference externalRef : externalReferences) {
             IndexedResource iresource = index.lookup(externalRef.getResource(),
                     Paths.get(artifact.getFile().toURI()));
 
@@ -236,16 +250,17 @@ private VersionMetaData registerWithAutoRefs(RegistryClient registryClient, Regi
             reference.setVersion(iresource.getRegistration().getVersion());
             reference.setGroupId(iresource.getRegistration().getGroupId());
             reference.setArtifactId(iresource.getRegistration().getArtifactId());
-
-            return reference;
-        }).sorted((ref1, ref2) -> ref1.getName().compareTo(ref2.getName())).collect(Collectors.toList());
+            registeredReferences.add(reference);
+        }
+        registeredReferences.sort((ref1, ref2) -> ref1.getName().compareTo(ref2.getName()));
 
         registrationStack.pop();
         return registerArtifact(registryClient, artifact, registeredReferences);
     }
 
     private void registerDirectory(RegistryClient registryClient, RegisterArtifact artifact)
-            throws IOException, ExecutionException, InterruptedException {
+            throws IOException, ExecutionException, InterruptedException, MojoExecutionException,
+            MojoFailureException {
         switch (artifact.getArtifactType()) {
             case ArtifactType.AVRO:
                 final AvroDirectoryParser avroDirectoryParser = new AvroDirectoryParser(registryClient);
@@ -277,8 +292,8 @@ private void registerDirectory(RegistryClient registryClient, RegisterArtifact a
     }
 
     private VersionMetaData registerArtifact(RegistryClient registryClient, RegisterArtifact artifact,
-            List<ArtifactReference> references)
-            throws FileNotFoundException, ExecutionException, InterruptedException {
+            List<ArtifactReference> references) throws FileNotFoundException, ExecutionException,
+            InterruptedException, MojoExecutionException, MojoFailureException {
         if (artifact.getFile() != null) {
             return registerArtifact(registryClient, artifact, new FileInputStream(artifact.getFile()),
                     references);
@@ -303,7 +318,7 @@ private VersionMetaData getArtifactVersionMetadata(RegistryClient registryClient
 
     private VersionMetaData registerArtifact(RegistryClient registryClient, RegisterArtifact artifact,
             InputStream artifactContent, List<ArtifactReference> references)
-            throws ExecutionException, InterruptedException {
+            throws ExecutionException, InterruptedException, MojoFailureException, MojoExecutionException {
         String groupId = artifact.getGroupId();
         String artifactId = artifact.getArtifactId();
         String version = artifact.getVersion();
@@ -350,6 +365,9 @@ private VersionMetaData registerArtifact(RegistryClient registryClient, Register
                 if (artifact.getIfExists() != null) {
                     config.queryParameters.ifExists = IfArtifactExists
                             .forValue(artifact.getIfExists().value());
+                    if (dryRun) {
+                        config.queryParameters.dryRun = true;
+                    }
                 }
                 config.queryParameters.canonical = canonicalize;
             });
@@ -358,8 +376,9 @@ private VersionMetaData registerArtifact(RegistryClient registryClient, Register
                     groupId, artifactId, vmd.getVersion().getGlobalId()));
 
             return vmd.getVersion();
-        } catch (ProblemDetails e) {
-            throw new RuntimeException(e.getDetail());
+        } catch (RuleViolationProblemDetails | ProblemDetails e) {
+            logAndThrow(e);
+            return null;
         }
     }
 
@@ -368,8 +387,8 @@ private static boolean hasReferences(RegisterArtifact artifact) {
     }
 
     private List<ArtifactReference> processArtifactReferences(RegistryClient registryClient,
-            List<RegisterArtifactReference> referencedArtifacts)
-            throws FileNotFoundException, ExecutionException, InterruptedException {
+            List<RegisterArtifactReference> referencedArtifacts) throws FileNotFoundException,
+            ExecutionException, InterruptedException, MojoExecutionException, MojoFailureException {
         List<ArtifactReference> references = new ArrayList<>();
         for (RegisterArtifactReference artifact : referencedArtifacts) {
             List<ArtifactReference> nestedReferences = new ArrayList<>();
@@ -434,7 +453,6 @@ private void addExistingReferencesToIndex(RegistryClient registryClient, Referen
                 }
                 index.index(ref.getResourceName(), vmd);
             }
-            ;
         }
     }
 

utils/maven-plugin/src/main/java/io/apicurio/registry/maven/TestUpdateRegistryMojo.java

@@ -15,8 +15,11 @@
 
 /**
  * Test artifact against current artifact rules, if an update is possible / valid.
+ * 
+ * @deprecated In favor of using the "dryRun" option of the "register" mojo.
  */
 @Mojo(name = "test-update")
+@Deprecated
 public class TestUpdateRegistryMojo extends AbstractRegistryMojo {
 
     /**