fix(import): Fix an issue where migrating from v2 to v3 failed to create the "latest" branch

app/src/main/java/io/apicurio/registry/storage/importing/v2/SqlDataUpgrader.java

@@ -2,6 +2,9 @@
 
 import io.apicurio.registry.content.ContentHandle;
 import io.apicurio.registry.content.TypedContent;
+import io.apicurio.registry.model.BranchId;
+import io.apicurio.registry.model.GA;
+import io.apicurio.registry.model.VersionId;
 import io.apicurio.registry.storage.RegistryStorage;
 import io.apicurio.registry.storage.dto.ArtifactReferenceDto;
 import io.apicurio.registry.storage.dto.ArtifactVersionMetaDataDto;
@@ -23,6 +26,7 @@
 import io.apicurio.registry.utils.impexp.v2.GlobalRuleEntity;
 import io.apicurio.registry.utils.impexp.v2.GroupEntity;
 import io.apicurio.registry.utils.impexp.v3.ArtifactEntity;
+import io.apicurio.registry.utils.impexp.v3.BranchEntity;
 import org.apache.commons.codec.digest.DigestUtils;
 import org.slf4j.Logger;
 
@@ -124,10 +128,17 @@ public void importArtifactVersion(ArtifactVersionEntity entity) {
                         .modifiedBy(entity.createdBy).modifiedOn(entity.createdOn).name(entity.name)
                         .owner(entity.createdBy).build();
                 storage.importArtifact(artifactEntity);
+
+                // Also create the "latest" branch.
+                BranchEntity branchEntity = BranchEntity.builder().groupId(entity.groupId)
+                        .artifactId(entity.artifactId).branchId("latest").createdOn(entity.createdOn)
+                        .owner(entity.createdBy).modifiedOn(entity.createdOn).modifiedBy(entity.createdBy)
+                        .build();
+                storage.importBranch(branchEntity);
             }
 
+            // If this version is the latest, update the artifact metadata with its metadata
             if (entity.isLatest) {
-                // If this version is the latest, update the artifact metadata with its metadata
                 EditableArtifactMetaDataDto editableArtifactMetaDataDto = EditableArtifactMetaDataDto
                         .builder().name(newEntity.name).owner(newEntity.owner)
                         .description(newEntity.description).labels(newEntity.labels).build();
@@ -139,6 +150,14 @@ public void importArtifactVersion(ArtifactVersionEntity entity) {
             storage.importArtifactVersion(newEntity);
             log.debug("Artifact version imported successfully: {}", entity);
             globalIdMapping.put(oldGlobalId, entity.globalId);
+
+            // Append this version to the "latest" branch
+            String entityVersion = entity.version;
+            if (entityVersion == null) {
+                entityVersion = String.valueOf(entity.versionId);
+            }
+            storage.appendVersionToBranch(new GA(entity.groupId, entity.artifactId), new BranchId("latest"),
+                    new VersionId(entityVersion));
         } catch (VersionAlreadyExistsException ex) {
             if (ex.getGlobalId() != null) {
                 log.warn("Duplicate globalId {} detected, skipping import of artifact version: {}",

app/src/test/java/io/apicurio/registry/DataUpgradeTest.java

@@ -2,7 +2,11 @@
 
 import io.apicurio.registry.model.GroupId;
 import io.apicurio.registry.rest.client.models.ArtifactReference;
+import io.apicurio.registry.rest.client.models.ArtifactSearchResults;
+import io.apicurio.registry.rest.client.models.BranchMetaData;
 import io.apicurio.registry.rest.client.models.HandleReferencesType;
+import io.apicurio.registry.rest.client.models.ProblemDetails;
+import io.apicurio.registry.rest.client.models.VersionMetaData;
 import io.apicurio.registry.storage.RegistryStorage;
 import io.apicurio.registry.types.Current;
 import io.apicurio.registry.utils.IoUtil;
@@ -152,4 +156,46 @@ public void testCheckJsonWithReferences() throws Exception {
          * HandleReferencesType.DEREFERENCE; }));
          */
     }
+
+    @Test
+    public void testLatestBranch() {
+        try {
+            ArtifactSearchResults results = clientV3.search().artifacts().get();
+            results.getArtifacts().forEach(artifact -> {
+                String groupId = "default";
+                if (artifact.getGroupId() != null) {
+                    groupId = artifact.getGroupId();
+                }
+                BranchMetaData branchMetaData = clientV3.groups().byGroupId(groupId).artifacts()
+                        .byArtifactId(artifact.getArtifactId()).branches().byBranchId("latest").get();
+                Assertions.assertNotNull(branchMetaData);
+                Assertions.assertEquals(artifact.getGroupId(), branchMetaData.getGroupId());
+                Assertions.assertEquals(artifact.getArtifactId(), branchMetaData.getArtifactId());
+                Assertions.assertEquals("latest", branchMetaData.getBranchId());
+
+                VersionMetaData versionMetaData = clientV3.groups().byGroupId(groupId).artifacts()
+                        .byArtifactId(artifact.getArtifactId()).versions()
+                        .byVersionExpression("branch=latest").get();
+                Assertions.assertNotNull(versionMetaData);
+                Assertions.assertEquals(artifact.getGroupId(), versionMetaData.getGroupId());
+                Assertions.assertEquals(artifact.getArtifactId(), versionMetaData.getArtifactId());
+            });
+
+            // Make sure the latest version of "MixAvroExample/Farewell" is version "2"
+            VersionMetaData versionMetaData = clientV3.groups().byGroupId("MixAvroExample").artifacts()
+                    .byArtifactId("Farewell").versions().byVersionExpression("branch=latest").get();
+            Assertions.assertNotNull(versionMetaData);
+            Assertions.assertEquals("2", versionMetaData.getVersion());
+
+            // Make sure the latest version of "default/city" is version "2"
+            versionMetaData = clientV3.groups().byGroupId("default").artifacts().byArtifactId("city")
+                    .versions().byVersionExpression("branch=latest").get();
+            Assertions.assertNotNull(versionMetaData);
+            Assertions.assertEquals("2", versionMetaData.getVersion());
+        } catch (ProblemDetails e) {
+            System.err.println("ERROR: " + e.getDetail());
+            throw e;
+        }
+    }
+
 }

utils/importexport/src/main/java/io/apicurio/registry/utils/impexp/EntityReader.java

@@ -159,6 +159,25 @@ private void createEntityIndex() {
             }
         }
 
+        if (manifest == null) {
+            throw new RuntimeException("No manifest found");
+        }
+        try {
+            readManifest(manifest);
+        } catch (IOException e) {
+            throw new RuntimeException("Invalid manifest: ", e);
+        }
+
+        // Make sure we sort the versions when upgrading from v2 to v3 - this is
+        // so that the "latest" branch contains the versions in the correct order.
+        if (majorVersion == 2) {
+            versions.sort((v1, v2) -> {
+                long v1GlobalId = getArtifactVersionOrder(v1);
+                long v2GlobalId = getArtifactVersionOrder(v2);
+                return (int) (v1GlobalId - v2GlobalId);
+            });
+        }
+
         entities = new LinkedList<>();
         if (manifest != null) {
             entities.add(manifest);
@@ -269,4 +288,14 @@ private <T> T readEntry(EntityInfo entry, Class<T> theClass) throws IOException
         return entity;
     }
 
+    private long getArtifactVersionOrder(EntityInfo artifactVersionEntityInfo) {
+        try {
+            Entity entity = readArtifactVersion(artifactVersionEntityInfo);
+            return ((io.apicurio.registry.utils.impexp.v2.ArtifactVersionEntity) entity).globalId;
+        } catch (IOException e) {
+            // Nothing we can do here. :(
+            return 0;
+        }
+    }
+
 }