Add support for autoregister schemas in the json serde (Apicurio#4127)

app/src/test/java/io/apicurio/registry/noprofile/serde/JsonSchemaSerdeTest.java

@@ -116,6 +116,54 @@ public void testJsonSchemaSerde() throws Exception {
         }
     }
 
+    @Test
+    public void testJsonSchemaSerdeAutoRegister() throws Exception {
+        String groupId = TestUtils.generateGroupId();
+        String artifactId = generateArtifactId();
+
+        Person person = new Person("Carles", "Arnal", 30);
+
+        try (JsonSchemaKafkaSerializer<Person> serializer = new JsonSchemaKafkaSerializer<>(restClient, true);
+             Deserializer<Person> deserializer = new JsonSchemaKafkaDeserializer<>(restClient, true)) {
+
+            Map<String, Object> config = new HashMap<>();
+            config.put(SerdeConfig.EXPLICIT_ARTIFACT_GROUP_ID, groupId);
+            config.put(SerdeConfig.ARTIFACT_RESOLVER_STRATEGY, SimpleTopicIdStrategy.class.getName());
+            config.put(SerdeConfig.SCHEMA_LOCATION, "/io/apicurio/registry/util/json-schema.json");
+            config.put(SerdeConfig.AUTO_REGISTER_ARTIFACT, true);
+            serializer.configure(config, false);
+
+            deserializer.configure(Collections.emptyMap(), false);
+
+            Headers headers = new RecordHeaders();
+            byte[] bytes = serializer.serialize(artifactId, headers, person);
+
+            person = deserializer.deserialize(artifactId, headers, bytes);
+
+            Assertions.assertEquals("Carles", person.getFirstName());
+            Assertions.assertEquals("Arnal", person.getLastName());
+            Assertions.assertEquals(30, person.getAge());
+
+            person.setAge(-1);
+
+            try {
+                serializer.serialize(artifactId, new RecordHeaders(), person);
+                Assertions.fail();
+            } catch (Exception ignored) {
+            }
+
+            serializer.setValidationEnabled(false); // disable validation
+            // create invalid person bytes
+            bytes = serializer.serialize(artifactId, headers, person);
+
+            try {
+                deserializer.deserialize(artifactId, headers, bytes);
+                Assertions.fail();
+            } catch (Exception ignored) {
+            }
+        }
+    }
+
     @Test
     public void testJsonSchemaSerdeHeaders() throws Exception {
         InputStream jsonSchema = getClass().getResourceAsStream("/io/apicurio/registry/util/json-schema.json");

schema-resolver/src/main/java/io/apicurio/registry/resolver/DefaultSchemaResolver.java

@@ -91,16 +91,23 @@ private Optional<SchemaLookupResult<S>> getSchemaFromCache(ArtifactReference art
 
     private SchemaLookupResult<S> getSchemaFromRegistry(ParsedSchema<S> parsedSchema, Record<T> data, ArtifactReference artifactReference) {
 
-        if (autoCreateArtifact && schemaParser.supportsExtractSchemaFromData()) {
-            if (parsedSchema == null) {
-                parsedSchema = schemaParser.getSchemaFromData(data, dereference);
-            }
-
-            if (parsedSchema.hasReferences()) {
-                //List of references lookup, to be used to create the references for the artifact
-                final List<SchemaLookupResult<S>> schemaLookupResults = handleArtifactReferences(data, parsedSchema);
-                return handleAutoCreateArtifact(parsedSchema, artifactReference, schemaLookupResults);
-            } else {
+        if (autoCreateArtifact) {
+
+            if (schemaParser.supportsExtractSchemaFromData()) {
+
+                if (parsedSchema == null) {
+                    parsedSchema = schemaParser.getSchemaFromData(data, dereference);
+                }
+
+                if (parsedSchema.hasReferences()) {
+                    //List of references lookup, to be used to create the references for the artifact
+                    final List<SchemaLookupResult<S>> schemaLookupResults = handleArtifactReferences(data, parsedSchema);
+                    return handleAutoCreateArtifact(parsedSchema, artifactReference, schemaLookupResults);
+                } else {
+                    return handleAutoCreateArtifact(parsedSchema, artifactReference);
+                }
+            } else if (config.getExplicitSchemaLocation() != null && schemaParser.supportsGetSchemaFromLocation()) {
+                parsedSchema = schemaParser.getSchemaFromLocation(config.getExplicitSchemaLocation());
                 return handleAutoCreateArtifact(parsedSchema, artifactReference);
             }
         }

schema-resolver/src/main/java/io/apicurio/registry/resolver/SchemaParser.java

@@ -31,10 +31,27 @@ public interface SchemaParser<S, U> {
      */
     ParsedSchema<S> getSchemaFromData(Record<U> data, boolean dereference);
 
+    /**
+     * In some artifact types, such as Json, we allow defining a local place for the schema.
+     *
+     * @param location the schema location
+     * @return the ParsedSchema, containing both the raw schema (bytes) and the parsed schema. Can be null.
+     */
+    default ParsedSchema<S> getSchemaFromLocation(String location) {
+        return null;
+    }
+
     /**
      * Flag that indicates if {@link SchemaParser#getSchemaFromData(Record)} is implemented or not.
      */
     default boolean supportsExtractSchemaFromData() {
         return true;
     }
+
+    /**
+     * Flag that indicates if {@link SchemaParser#getSchemaFromLocation(String)} is implemented or not.
+     */
+    default boolean supportsGetSchemaFromLocation() {
+        return false;
+    }
 }

schema-resolver/src/main/java/io/apicurio/registry/resolver/SchemaResolverConfig.java

@@ -73,6 +73,12 @@ public class SchemaResolverConfig {
      */
     public static final String EXPLICIT_ARTIFACT_ID = "apicurio.registry.artifact.artifact-id";
 
+    /**
+     * Only applicable for serializers
+     * Optional, set explicitly the schema location in the classpath for the schema to be used for serializing the data.
+     */
+    public static final String SCHEMA_LOCATION = "apicurio.registry.artifact.schema.location";
+
     /**
      * Only applicable for serializers
      * Optional, set explicitly the version used for querying/creating an artifact.

schema-resolver/src/main/java/io/apicurio/registry/resolver/config/DefaultSchemaResolverConfig.java

@@ -112,6 +112,10 @@ public String getExplicitArtifactId() {
         return getString(EXPLICIT_ARTIFACT_ID);
     }
 
+    public String getExplicitSchemaLocation() {
+        return getString(SCHEMA_LOCATION);
+    }
+
     public String getExplicitArtifactVersion() {
         return getString(EXPLICIT_ARTIFACT_VERSION);
     }

serdes/jsonschema-serde/src/main/java/io/apicurio/registry/serde/jsonschema/JsonSchemaKafkaSerializer.java

@@ -104,7 +104,6 @@ public SchemaParser<JsonSchema, T> schemaParser() {
      */
     @Override
     protected void serializeData(ParsedSchema<JsonSchema> schema, T data, OutputStream out) throws IOException {
-        //TODO add property to specify a jsonschema to allow for auto-register json schemas
         serializeData(null, schema, data, out);
     }
 

serdes/jsonschema-serde/src/main/java/io/apicurio/registry/serde/jsonschema/JsonSchemaKafkaSerializerConfig.java

@@ -13,9 +13,8 @@
 public class JsonSchemaKafkaSerializerConfig extends BaseKafkaSerDeConfig {
 
     private static ConfigDef configDef() {
-        ConfigDef configDef = new ConfigDef()
+        return new ConfigDef()
                 .define(VALIDATION_ENABLED, Type.BOOLEAN, VALIDATION_ENABLED_DEFAULT, Importance.MEDIUM, "Whether to validate the data against the json schema");
-        return configDef;
     }
 
     /**
@@ -30,5 +29,4 @@ public JsonSchemaKafkaSerializerConfig(Map<?, ?> originals) {
     public boolean validationEnabled() {
         return this.getBoolean(VALIDATION_ENABLED);
     }
-
 }

serdes/jsonschema-serde/src/main/java/io/apicurio/registry/serde/jsonschema/JsonSchemaParser.java

@@ -1,6 +1,7 @@
 package io.apicurio.registry.serde.jsonschema;
 
 import io.apicurio.registry.resolver.ParsedSchema;
+import io.apicurio.registry.resolver.ParsedSchemaImpl;
 import io.apicurio.registry.resolver.SchemaParser;
 import io.apicurio.registry.resolver.data.Record;
 import io.apicurio.registry.types.ArtifactType;
@@ -28,11 +29,6 @@ public JsonSchema parseSchema(byte[] rawSchema, Map<String, ParsedSchema<JsonSch
                 .collect(Collectors.toMap(Map.Entry::getKey, e -> e.getValue().getParsedSchema())), 0);
     }
 
-    //TODO we could implement some way of providing the jsonschema beforehand:
-    // - via annotation in the object being serialized
-    // - via config property
-    //if we do this users will be able to automatically registering the schema when using this serde
-
     /**
      * @see io.apicurio.registry.resolver.SchemaParser#getSchemaFromData(java.lang.Object)
      */
@@ -48,8 +44,22 @@ public ParsedSchema<JsonSchema> getSchemaFromData(Record<T> data, boolean derefe
         return null;
     }
 
+    @Override
+    public ParsedSchema<JsonSchema> getSchemaFromLocation(String location) {
+        String rawSchema = IoUtil.toString(Thread.currentThread().getContextClassLoader().getResourceAsStream(location));
+
+        return new ParsedSchemaImpl<JsonSchema>()
+                .setParsedSchema(new JsonSchema(rawSchema))
+                .setRawSchema(rawSchema.getBytes());
+    }
+
     @Override
     public boolean supportsExtractSchemaFromData() {
         return false;
     }
+
+    @Override
+    public boolean supportsGetSchemaFromLocation() {
+        return true;
+    }
 }

serdes/serde-common/src/main/java/io/apicurio/registry/serde/SerdeConfig.java

@@ -75,6 +75,12 @@ public class SerdeConfig {
      */
     public static final String EXPLICIT_ARTIFACT_ID = SchemaResolverConfig.EXPLICIT_ARTIFACT_ID;
 
+    /**
+     * Only applicable for serializers
+     * Optional, set explicitly the schema used for serialization.
+     */
+    public static final String SCHEMA_LOCATION = SchemaResolverConfig.SCHEMA_LOCATION;
+
     /**
      * Only applicable for serializers
      * Optional, set explicitly the version used for querying/creating an artifact.