add transportversion, javadocs

server/src/main/java/org/elasticsearch/TransportVersions.java

@@ -162,6 +162,7 @@ static TransportVersion def(int id) {
     public static final TransportVersion AMAZON_BEDROCK_TASK_SETTINGS_8_19 = def(8_841_0_17);
     public static final TransportVersion BATCHED_QUERY_PHASE_VERSION_BACKPORT_8_X = def(8_841_0_19);
     public static final TransportVersion SEARCH_INCREMENTAL_TOP_DOCS_NULL_BACKPORT_8_19 = def(8_841_0_20);
+    public static final TransportVersion ML_INFERENCE_SAGEMAKER_8_19 = def(8_841_0_21);
     public static final TransportVersion INITIAL_ELASTICSEARCH_9_0 = def(9_000_0_00);
     public static final TransportVersion REMOVE_SNAPSHOT_FAILURES_90 = def(9_000_0_01);
     public static final TransportVersion TRANSPORT_STATS_HANDLING_TIME_REQUIRED_90 = def(9_000_0_02);
@@ -232,6 +233,7 @@ static TransportVersion def(int id) {
     public static final TransportVersion BATCHED_QUERY_EXECUTION_DELAYABLE_WRITABLE = def(9_057_0_00);
     public static final TransportVersion SEARCH_INCREMENTAL_TOP_DOCS_NULL = def(9_058_0_00);
     public static final TransportVersion COMPRESS_DELAYABLE_WRITEABLE = def(9_059_0_00);
+    public static final TransportVersion ML_INFERENCE_SAGEMAKER = def(9_060_0_00);
 
     /*
      * STOP! READ THIS FIRST! No, really,

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/sagemaker/SageMakerService.java

@@ -9,6 +9,7 @@
 
 import org.elasticsearch.ElasticsearchStatusException;
 import org.elasticsearch.TransportVersion;
+import org.elasticsearch.TransportVersions;
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.action.support.SubscribableListener;
 import org.elasticsearch.core.Nullable;
@@ -267,7 +268,7 @@ public void start(Model model, TimeValue timeout, ActionListener<Boolean> listen
 
     @Override
     public TransportVersion getMinimalSupportedVersion() {
-        return TransportVersion.current();
+        return TransportVersions.ML_INFERENCE_SAGEMAKER;
     }
 
     @Override

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/sagemaker/model/SageMakerModel.java

@@ -22,6 +22,9 @@
 import java.util.Optional;
 
 /**
+ * This model represents all models in SageMaker. SageMaker maintains a base set of settings and configurations, and this model manages
+ * those. Any settings that are required for a specific model are stored in the {@link SageMakerStoredServiceSchema} and
+ * {@link SageMakerStoredTaskSchema}.
  * Design:
  * - Region is stored in ServiceSettings and is used to create the SageMaker client.
  * - RateLimiting is based on AWS Service Quota, metered by account and region. The SDK client handles rate limiting internally. In order to

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/sagemaker/model/SageMakerServiceSettings.java

@@ -8,6 +8,7 @@
 package org.elasticsearch.xpack.inference.services.sagemaker.model;
 
 import org.elasticsearch.TransportVersion;
+import org.elasticsearch.TransportVersions;
 import org.elasticsearch.common.ValidationException;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
@@ -28,6 +29,10 @@
 import static org.elasticsearch.xpack.inference.services.ServiceUtils.extractOptionalString;
 import static org.elasticsearch.xpack.inference.services.ServiceUtils.extractRequiredString;
 
+/**
+ * Maintains the settings for SageMaker that cannot be changed without impacting semantic search and AI assistants.
+ * Model-specific settings are stored in {@link SageMakerStoredServiceSchema}.
+ */
 record SageMakerServiceSettings(
     String endpointName,
     String region,
@@ -75,7 +80,7 @@ public String getWriteableName() {
 
     @Override
     public TransportVersion getMinimalSupportedVersion() {
-        return TransportVersion.current();
+        return TransportVersions.ML_INFERENCE_SAGEMAKER;
     }
 
     @Override

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/sagemaker/model/SageMakerTaskSettings.java

@@ -8,6 +8,7 @@
 package org.elasticsearch.xpack.inference.services.sagemaker.model;
 
 import org.elasticsearch.TransportVersion;
+import org.elasticsearch.TransportVersions;
 import org.elasticsearch.common.ValidationException;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
@@ -22,6 +23,9 @@
 
 import static org.elasticsearch.xpack.inference.services.ServiceUtils.extractOptionalString;
 
+/**
+ * Maintains mutable settings for SageMaker. Model-specific settings are stored in {@link SageMakerStoredTaskSchema}.
+ */
 record SageMakerTaskSettings(
     @Nullable String customAttributes,
     @Nullable String enableExplanations,
@@ -92,7 +96,7 @@ public String getWriteableName() {
 
     @Override
     public TransportVersion getMinimalSupportedVersion() {
-        return TransportVersion.current();
+        return TransportVersions.ML_INFERENCE_SAGEMAKER;
     }
 
     @Override

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/sagemaker/schema/SageMakerSchema.java

@@ -28,6 +28,11 @@
 import java.util.Map;
 import java.util.stream.Stream;
 
+/**
+ * All the logic that is required to call any SageMaker model is handled within this Schema class.
+ * Any model-specific logic is handled within the associated {@link SageMakerSchemaPayload}.
+ * This schema is specific for SageMaker's non-streaming API. For streaming, see {@link SageMakerStreamSchema}.
+ */
 public class SageMakerSchema {
     private static final String INTERNAL_DEPENDENCY_ERROR = "Received an internal dependency error from SageMaker for [%s]";
     private static final String INTERNAL_FAILURE = "Received an internal failure from SageMaker for [%s]";
@@ -128,10 +133,6 @@ protected Tuple<String, RestStatus> errorMessageAndStatus(SageMakerModel model,
         return Tuple.tuple(errorMessage, restStatus);
     }
 
-    public String api() {
-        return schemaPayload.api();
-    }
-
     public SageMakerStoredServiceSchema apiServiceSettings(Map<String, Object> serviceSettings, ValidationException validationException) {
         return schemaPayload.apiServiceSettings(serviceSettings, validationException);
     }

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/sagemaker/schema/SageMakerSchemaPayload.java

@@ -23,25 +23,39 @@
 import java.util.stream.Stream;
 
 public interface SageMakerSchemaPayload {
+
+    /**
+     * The model API keyword that users will supply in the service settings when creating the request.
+     * Automatically registered in {@link SageMakerSchemas}.
+     */
     String api();
 
+    /**
+     * The supported TaskTypes for this model API.
+     * Automatically registered in {@link SageMakerSchemas}.
+     */
     EnumSet<TaskType> supportedTasks();
 
+    /**
+     * Implement this if the model requires extra ServiceSettings that can be saved to the model index.
+     * This can be accessed via {@link SageMakerModel#apiServiceSettings()}.
+     */
     default SageMakerStoredServiceSchema apiServiceSettings(Map<String, Object> serviceSettings, ValidationException validationException) {
         return SageMakerStoredServiceSchema.NO_OP;
     }
 
+    /**
+     * Implement this if the model requires extra TaskSettings that can be saved to the model index.
+     * This can be accessed via {@link SageMakerModel#apiTaskSettings()}.
+     */
     default SageMakerStoredTaskSchema apiTaskSettings(Map<String, Object> taskSettings, ValidationException validationException) {
         return SageMakerStoredTaskSchema.NO_OP;
     }
 
     /**
-     * Automatically register the required registry entries with {@link org.elasticsearch.xpack.inference.InferenceNamedWriteablesProvider}.
+     * This must be thrown if {@link SageMakerModel#apiServiceSettings()} or {@link SageMakerModel#apiTaskSettings()} return the wrong
+     * object types.
      */
-    default Stream<NamedWriteableRegistry.Entry> namedWriteables() {
-        return Stream.of();
-    }
-
     default Exception createUnsupportedSchemaException(SageMakerModel model) {
         return new IllegalArgumentException(
             Strings.format(
@@ -54,12 +68,31 @@ default Exception createUnsupportedSchemaException(SageMakerModel model) {
         );
     }
 
+    /**
+     * Automatically register the required registry entries with {@link org.elasticsearch.xpack.inference.InferenceNamedWriteablesProvider}.
+     */
+    default Stream<NamedWriteableRegistry.Entry> namedWriteables() {
+        return Stream.of();
+    }
+
+    /**
+     * The MIME type of the response from SageMaker.
+     */
     String accept(SageMakerModel model);
 
+    /**
+     * The MIME type of the request to SageMaker.
+     */
     String contentType(SageMakerModel model);
 
+    /**
+     * Translate to the body of the request in the MIME type specified by {@link #contentType(SageMakerModel)}.
+     */
     SdkBytes requestBytes(SageMakerModel model, SageMakerInferenceRequest request) throws Exception;
 
+    /**
+     * Translate from the body of the response in the MIME type specified by {@link #accept(SageMakerModel)}.
+     */
     InferenceServiceResults responseBody(SageMakerModel model, InvokeEndpointResponse response) throws Exception;
 
 }

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/sagemaker/schema/SageMakerSchemas.java

@@ -24,6 +24,9 @@
 
 import static org.elasticsearch.core.Strings.format;
 
+/**
+ * The mapping and registry for all supported model API.
+ */
 public class SageMakerSchemas {
     private static final Map<TaskAndApi, SageMakerSchema> schemas;
     private static final Map<TaskAndApi, SageMakerStreamSchema> streamSchemas;
@@ -33,6 +36,9 @@ public class SageMakerSchemas {
     private static final EnumSet<TaskType> supportedTaskTypes;
 
     static {
+        /*
+         * Add new model API to the register call.
+         */
         schemas = register(new OpenAiTextEmbeddingPayload());
 
         streamSchemas = schemas.entrySet()

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/sagemaker/schema/SageMakerStoredServiceSchema.java

@@ -8,11 +8,15 @@
 package org.elasticsearch.xpack.inference.services.sagemaker.schema;
 
 import org.elasticsearch.TransportVersion;
+import org.elasticsearch.TransportVersions;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.io.stream.VersionedNamedWriteable;
 import org.elasticsearch.xcontent.ToXContentFragment;
 import org.elasticsearch.xcontent.XContentBuilder;
 
+/**
+ * Contains any model-specific settings that are stored in SageMakerServiceSettings.
+ */
 public interface SageMakerStoredServiceSchema extends ToXContentFragment, VersionedNamedWriteable {
     SageMakerStoredServiceSchema NO_OP = new SageMakerStoredServiceSchema() {
         private static final String NAME = "noop_sagemaker_service_schema";
@@ -24,7 +28,7 @@ public String getWriteableName() {
 
         @Override
         public TransportVersion getMinimalSupportedVersion() {
-            return TransportVersion.current();
+            return TransportVersions.ML_INFERENCE_SAGEMAKER;
         }
 
         @Override

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/sagemaker/schema/SageMakerStoredTaskSchema.java

@@ -8,6 +8,7 @@
 package org.elasticsearch.xpack.inference.services.sagemaker.schema;
 
 import org.elasticsearch.TransportVersion;
+import org.elasticsearch.TransportVersions;
 import org.elasticsearch.common.ValidationException;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.io.stream.VersionedNamedWriteable;
@@ -16,6 +17,10 @@
 
 import java.util.Map;
 
+/**
+ * Contains any model-specific settings that are stored in SageMakerTaskSettings.
+ * Because TaskSettings are updatable, this object must be able to mutate itself, which we handle through the {@link Builder}.
+ */
 public interface SageMakerStoredTaskSchema extends ToXContentFragment, VersionedNamedWriteable {
     SageMakerStoredTaskSchema NO_OP = new SageMakerStoredTaskSchema() {
 
@@ -44,7 +49,7 @@ public String getWriteableName() {
 
         @Override
         public TransportVersion getMinimalSupportedVersion() {
-            return TransportVersion.current(); // TODO
+            return TransportVersions.ML_INFERENCE_SAGEMAKER;
         }
 
         @Override
@@ -60,9 +65,17 @@ default SageMakerStoredTaskSchema update(Map<String, Object> map, ValidationExce
         return toBuilder().fromMap(map, exception).build();
     }
 
+    /**
+     * This is called during {@link #update(Map, ValidationException)}.
+     * Implementations should set the current field values in the Builder, as the update function is expected to overwrite them.
+     */
     Builder toBuilder();
 
     interface Builder {
+        /**
+         * The map will either come from the PUT request or the stored value in the model index.
+         * It must match the map written by toXContent.
+         */
         Builder fromMap(Map<String, Object> map, ValidationException exception);
 
         SageMakerStoredTaskSchema build();

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/sagemaker/schema/SageMakerStreamSchema.java

@@ -29,6 +29,11 @@
 import java.util.concurrent.Flow;
 import java.util.function.BiFunction;
 
+/**
+ * All the logic that is required to call any SageMaker model is handled within this Schema class.
+ * Any model-specific logic is handled within the associated {@link SageMakerStreamSchemaPayload}.
+ * This schema is specific for SageMaker's streaming API. For non-streaming, see {@link SageMakerSchema}.
+ */
 public class SageMakerStreamSchema extends SageMakerSchema {
 
     private final SageMakerStreamSchemaPayload payload;

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/sagemaker/schema/SageMakerStreamSchemaPayload.java

@@ -7,6 +7,8 @@
 
 package org.elasticsearch.xpack.inference.services.sagemaker.schema;
 
+import org.elasticsearch.xpack.inference.services.sagemaker.SageMakerInferenceRequest;
+
 import software.amazon.awssdk.core.SdkBytes;
 
 import org.elasticsearch.inference.InferenceServiceResults;
@@ -16,13 +18,12 @@
 
 import java.util.EnumSet;
 
+/**
+ * Implemented for models that support streaming.
+ * This is an extension of {@link SageMakerSchemaPayload} because Elastic expects Completion tasks to handle both streaming and
+ * non-streaming, and all models currently support toggling streaming on/off.
+ */
 public interface SageMakerStreamSchemaPayload extends SageMakerSchemaPayload {
-    InferenceServiceResults.Result streamResponseBody(SageMakerModel model, SdkBytes response) throws Exception;
-
-    SdkBytes chatCompletionRequestBytes(SageMakerModel model, UnifiedCompletionRequest request) throws Exception;
-
-    InferenceServiceResults.Result chatCompletionResponseBody(SageMakerModel model, SdkBytes response) throws Exception;
-
     /**
      * We currently only support streaming for Completion and Chat Completion, and if we are going to implement one then we should implement
      * the other, so this interface requires both streaming input and streaming unified input.
@@ -33,4 +34,14 @@ public interface SageMakerStreamSchemaPayload extends SageMakerSchemaPayload {
     default EnumSet<TaskType> supportedTasks() {
         return EnumSet.of(TaskType.COMPLETION, TaskType.CHAT_COMPLETION);
     }
+
+    /**
+     * This API would only be called for Completion task types. {@link #requestBytes(SageMakerModel, SageMakerInferenceRequest)} would
+     * handle the request translation for both streaming and non-streaming.
+     */
+    InferenceServiceResults.Result streamResponseBody(SageMakerModel model, SdkBytes response) throws Exception;
+
+    SdkBytes chatCompletionRequestBytes(SageMakerModel model, UnifiedCompletionRequest request) throws Exception;
+
+    InferenceServiceResults.Result chatCompletionResponseBody(SageMakerModel model, SdkBytes response) throws Exception;
 }

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/services/sagemaker/schema/openai/OpenAiTextEmbeddingPayload.java

@@ -7,6 +7,8 @@
 
 package org.elasticsearch.xpack.inference.services.sagemaker.schema.openai;
 
+import org.elasticsearch.TransportVersions;
+
 import software.amazon.awssdk.core.SdkBytes;
 import software.amazon.awssdk.services.sagemakerruntime.model.InvokeEndpointResponse;
 
@@ -132,7 +134,7 @@ public String getWriteableName() {
 
         @Override
         public TransportVersion getMinimalSupportedVersion() {
-            return TransportVersion.current();
+            return TransportVersions.ML_INFERENCE_SAGEMAKER;
         }
 
         @Override
@@ -180,7 +182,7 @@ public String getWriteableName() {
 
         @Override
         public TransportVersion getMinimalSupportedVersion() {
-            return TransportVersion.current();
+            return TransportVersions.ML_INFERENCE_SAGEMAKER;
         }
 
         @Override