Update Model API

common/src/main/java/org/opensearch/ml/common/MLModelGroup.java

@@ -39,6 +39,7 @@ public class MLModelGroup implements ToXContentObject {
     @Setter
     private String name;
     private String description;
+    @Setter
     private int latestVersion;
     private List<String> backendRoles;
     private User owner;

common/src/main/java/org/opensearch/ml/common/transport/model/MLUpdateModelAction.java

@@ -0,0 +1,18 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.ml.common.transport.model;
+
+import org.opensearch.action.ActionType;
+import org.opensearch.action.update.UpdateResponse;
+
+public class MLUpdateModelAction extends ActionType<UpdateResponse> {
+    public static MLUpdateModelAction INSTANCE = new MLUpdateModelAction();
+    public static final String NAME = "cluster:admin/opensearch/ml/models/update";
+
+    private MLUpdateModelAction() {
+        super(NAME, UpdateResponse::new);
+    }
+}

common/src/main/java/org/opensearch/ml/common/transport/model/MLUpdateModelInput.java

@@ -0,0 +1,155 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.ml.common.transport.model;
+
+import lombok.Data;
+import lombok.Builder;
+import lombok.Getter;
+import org.opensearch.core.common.io.stream.StreamInput;
+import org.opensearch.core.common.io.stream.StreamOutput;
+import org.opensearch.core.common.io.stream.Writeable;
+import org.opensearch.core.xcontent.ToXContentObject;
+import org.opensearch.core.xcontent.XContentBuilder;
+import org.opensearch.core.xcontent.XContentParser;
+import org.opensearch.ml.common.connector.Connector;
+import org.opensearch.ml.common.model.MLModelConfig;
+import org.opensearch.ml.common.model.TextEmbeddingModelConfig;
+
+import java.io.IOException;
+import java.util.Map;
+
+import static org.opensearch.core.xcontent.XContentParserUtils.ensureExpectedToken;
+import static org.opensearch.ml.common.connector.Connector.createConnector;
+
+@Data
+public class MLUpdateModelInput implements ToXContentObject, Writeable {
+
+    public static final String MODEL_ID_FIELD = "model_id"; // mandatory
+    public static final String DESCRIPTION_FIELD = "description"; // optional
+    public static final String MODEL_VERSION_FIELD = "model_version"; // optional
+    public static final String MODEL_NAME_FIELD = "name"; // optional
+    public static final String MODEL_GROUP_ID_FIELD = "model_group_id"; // optional
+    public static final String MODEL_CONFIG_FIELD = "model_config"; // optional
+    public static final String CONNECTOR_ID_FIELD = "connector_id"; // optional
+
+    @Getter
+    private String modelId;
+    private String description;
+    private String version;
+    private String name;
+    private String modelGroupId;
+    private MLModelConfig modelConfig;
+    private String connectorId;
+
+    @Builder(toBuilder = true)
+    public MLUpdateModelInput(String modelId, String description, String version, String name, String modelGroupId, MLModelConfig modelConfig, String connectorId) {
+        this.modelId = modelId;
+        this.description = description;
+        this.version = version;
+        this.name = name;
+        this.modelGroupId = modelGroupId;
+        this.modelConfig = modelConfig;
+        this.connectorId = connectorId;
+    }
+
+    public MLUpdateModelInput(StreamInput in) throws IOException {
+        this.modelId = in.readString();
+        this.description = in.readOptionalString();
+        this.version = in.readOptionalString();
+        this.name = in.readOptionalString();
+        this.modelGroupId = in.readOptionalString();
+        if (in.readBoolean()) {
+            modelConfig = new TextEmbeddingModelConfig(in);
+        }
+        this.connectorId = in.readOptionalString();
+    }
+
+    @Override
+    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
+        builder.startObject();
+        builder.field(MODEL_ID_FIELD, modelId);
+        if (name != null) {
+            builder.field(MODEL_NAME_FIELD, name);
+        }
+        if (description != null) {
+            builder.field(DESCRIPTION_FIELD, description);
+        }
+        if (version != null) {
+            builder.field(MODEL_VERSION_FIELD, version);
+        }
+        if (modelGroupId != null) {
+            builder.field(MODEL_GROUP_ID_FIELD, modelGroupId);
+        }
+        if (modelConfig != null) {
+            builder.field(MODEL_CONFIG_FIELD, modelConfig);
+        }
+        if (connectorId != null) {
+            builder.field(CONNECTOR_ID_FIELD, connectorId);
+        }
+        builder.endObject();
+        return builder;
+    }
+
+    @Override
+    public void writeTo(StreamOutput out) throws IOException {
+        out.writeString(modelId);
+        out.writeOptionalString(description);
+        out.writeOptionalString(version);
+        out.writeOptionalString(name);
+        out.writeOptionalString(modelGroupId);
+        if (modelConfig != null) {
+            out.writeBoolean(true);
+            modelConfig.writeTo(out);
+        } else {
+            out.writeBoolean(false);
+        }
+        out.writeOptionalString(connectorId);
+    }
+
+    public static MLUpdateModelInput parse(XContentParser parser) throws IOException {
+        String modelId = null;
+        String description = null;
+        String version = null;
+        String name = null;
+        String modelGroupId = null;
+        MLModelConfig modelConfig = null;
+        String connectorId = null;
+
+        ensureExpectedToken(XContentParser.Token.START_OBJECT, parser.currentToken(), parser);
+        while (parser.nextToken() != XContentParser.Token.END_OBJECT) {
+            String fieldName = parser.currentName();
+            parser.nextToken();
+            switch (fieldName) {
+                case MODEL_ID_FIELD:
+                    modelId = parser.text();
+                    break;
+                case DESCRIPTION_FIELD:
+                    description = parser.text();
+                    break;
+                case MODEL_NAME_FIELD:
+                    name = parser.text();
+                    break;
+                case MODEL_VERSION_FIELD:
+                    version = parser.text();
+                    break;
+                case MODEL_GROUP_ID_FIELD:
+                    modelGroupId = parser.text();
+                    break;
+                case MODEL_CONFIG_FIELD:
+                    modelConfig = TextEmbeddingModelConfig.parse(parser);
+                    break;
+                case CONNECTOR_ID_FIELD:
+                    connectorId = parser.text();
+                    break;
+                default:
+                    parser.skipChildren();
+                    break;
+            }
+        }
+        // Model ID can only be set through RestRequest. Model version can only be set automatically.
+        return new MLUpdateModelInput(modelId, description, version, name, modelGroupId, modelConfig, connectorId);
+    }
+}

common/src/main/java/org/opensearch/ml/common/transport/model/MLUpdateModelRequest.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.ml.common.transport.model;
+
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.ToString;
+import lombok.experimental.FieldDefaults;
+import org.opensearch.action.ActionRequest;
+import org.opensearch.action.ActionRequestValidationException;
+import org.opensearch.core.common.io.stream.InputStreamStreamInput;
+import org.opensearch.core.common.io.stream.OutputStreamStreamOutput;
+import org.opensearch.core.common.io.stream.StreamInput;
+import org.opensearch.core.common.io.stream.StreamOutput;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+
+import static org.opensearch.action.ValidateActions.addValidationError;
+
+@Getter
+@FieldDefaults(makeFinal = true, level = AccessLevel.PRIVATE)
+@ToString
+public class MLUpdateModelRequest extends ActionRequest {
+
+    MLUpdateModelInput updateModelInput;
+
+    @Builder
+    public MLUpdateModelRequest(MLUpdateModelInput updateModelInput) {
+        this.updateModelInput = updateModelInput;
+    }
+
+    public MLUpdateModelRequest(StreamInput in) throws IOException {
+        super(in);
+        updateModelInput = new MLUpdateModelInput(in);
+    }
+
+    @Override
+    public ActionRequestValidationException validate() {
+        ActionRequestValidationException exception = null;
+        if (updateModelInput == null) {
+            exception = addValidationError("Update Model Input can't be null", exception);
+        }
+
+        return exception;
+    }
+
+    @Override
+    public void writeTo(StreamOutput out) throws IOException {
+        super.writeTo(out);
+        this.updateModelInput.writeTo(out);
+    }
+
+    public static MLUpdateModelRequest fromActionRequest(ActionRequest actionRequest){
+        if (actionRequest instanceof MLUpdateModelRequest) {
+            return (MLUpdateModelRequest) actionRequest;
+        }
+
+        try (ByteArrayOutputStream baos = new ByteArrayOutputStream();
+                OutputStreamStreamOutput osso = new OutputStreamStreamOutput(baos)) {
+            actionRequest.writeTo(osso);
+            try (StreamInput in = new InputStreamStreamInput(new ByteArrayInputStream(baos.toByteArray()))) {
+                return new MLUpdateModelRequest(in);
+            }
+        } catch (IOException e) {
+            throw new UncheckedIOException("Failed to parse ActionRequest into MLUpdateModelRequest", e);
+        }
+    }
+}