[Backport 2.x] Separates RegisterModelStep into RegisterLocalModelStep and RegisterRemoteModelStep. Adds GetMLTaskStep. Handles optional params

src/main/java/org/opensearch/flowframework/common/CommonValue.java

@@ -81,6 +81,10 @@ private CommonValue() {}
     public static final String OUTPUT_FIELD_NAME = "output_field_name";
     /** Model Id field */
     public static final String MODEL_ID = "model_id";
+    /** Task Id field */
+    public static final String TASK_ID = "task_id";
+    /** Register Model Status field */
+    public static final String REGISTER_MODEL_STATUS = "register_model_status";
     /** Function Name field */
     public static final String FUNCTION_NAME = "function_name";
     /** Name field */
@@ -95,8 +99,20 @@ private CommonValue() {}
     public static final String CONNECTOR_ID = "connector_id";
     /** Model format field */
     public static final String MODEL_FORMAT = "model_format";
+    /** Model content hash value field */
+    public static final String MODEL_CONTENT_HASH_VALUE = "model_content_hash_value";
+    /** URL field */
+    public static final String URL = "url";
     /** Model config field */
     public static final String MODEL_CONFIG = "model_config";
+    /** Model type field */
+    public static final String MODEL_TYPE = "model_type";
+    /** Embedding dimension field */
+    public static final String EMBEDDING_DIMENSION = "embedding_dimension";
+    /** Framework type field */
+    public static final String FRAMEWORK_TYPE = "framework_type";
+    /** All config field */
+    public static final String ALL_CONFIG = "all_config";
     /** Version field */
     public static final String VERSION_FIELD = "version";
     /** Connector protocol field */

src/main/java/org/opensearch/flowframework/indices/FlowFrameworkIndicesHandler.java

@@ -335,7 +335,7 @@ public void putInitialStateToWorkflowState(String workflowId, User user, ActionL
             }
 
         }, e -> {
-            String errorMessage = "Failed to create global_context index";
+            String errorMessage = "Failed to create workflow_state index";
             logger.error(errorMessage, e);
             listener.onFailure(new FlowFrameworkException(errorMessage + " : " + e.getMessage(), ExceptionsHelper.status(e)));
         }));

src/main/java/org/opensearch/flowframework/workflow/GetMLTaskStep.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+package org.opensearch.flowframework.workflow;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.opensearch.ExceptionsHelper;
+import org.opensearch.core.action.ActionListener;
+import org.opensearch.core.rest.RestStatus;
+import org.opensearch.flowframework.exception.FlowFrameworkException;
+import org.opensearch.ml.client.MachineLearningNodeClient;
+import org.opensearch.ml.common.MLTask;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.concurrent.CompletableFuture;
+
+import static org.opensearch.flowframework.common.CommonValue.MODEL_ID;
+import static org.opensearch.flowframework.common.CommonValue.REGISTER_MODEL_STATUS;
+import static org.opensearch.flowframework.common.CommonValue.TASK_ID;
+
+/**
+ * Step to retrieve an ML Task
+ */
+public class GetMLTaskStep implements WorkflowStep {
+
+    private static final Logger logger = LogManager.getLogger(GetMLTaskStep.class);
+    private MachineLearningNodeClient mlClient;
+    static final String NAME = "get_ml_task";
+
+    /**
+     * Instantiate this class
+     * @param mlClient client to instantiate MLClient
+     */
+    public GetMLTaskStep(MachineLearningNodeClient mlClient) {
+        this.mlClient = mlClient;
+    }
+
+    @Override
+    public CompletableFuture<WorkflowData> execute(List<WorkflowData> data) {
+
+        CompletableFuture<WorkflowData> getMLTaskFuture = new CompletableFuture<>();
+
+        ActionListener<MLTask> actionListener = ActionListener.wrap(response -> {
+
+            // TODO : Add retry capability if response status is not COMPLETED :
+            // https://github.com/opensearch-project/opensearch-ai-flow-framework/issues/158
+
+            logger.info("ML Task retrieval successful");
+            getMLTaskFuture.complete(
+                new WorkflowData(
+                    Map.ofEntries(Map.entry(MODEL_ID, response.getModelId()), Map.entry(REGISTER_MODEL_STATUS, response.getState().name()))
+                )
+            );
+        }, exception -> {
+            logger.error("Failed to retrieve ML Task");
+            getMLTaskFuture.completeExceptionally(new FlowFrameworkException(exception.getMessage(), ExceptionsHelper.status(exception)));
+        });
+
+        String taskId = null;
+
+        for (WorkflowData workflowData : data) {
+            Map<String, Object> content = workflowData.getContent();
+            for (Entry<String, Object> entry : content.entrySet()) {
+                switch (entry.getKey()) {
+                    case TASK_ID:
+                        taskId = (String) content.get(TASK_ID);
+                        break;
+                    default:
+                        break;
+                }
+            }
+        }
+
+        if (taskId == null) {
+            logger.error("Failed to retrieve ML Task");
+            getMLTaskFuture.completeExceptionally(new FlowFrameworkException("Required fields are not provided", RestStatus.BAD_REQUEST));
+        } else {
+            mlClient.getTask(taskId, actionListener);
+        }
+
+        return getMLTaskFuture;
+    }
+
+    @Override
+    public String getName() {
+        return NAME;
+    }
+
+}

src/main/java/org/opensearch/flowframework/workflow/ModelGroupStep.java

@@ -38,7 +38,7 @@
  */
 public class ModelGroupStep implements WorkflowStep {
 
-    private static final Logger logger = LogManager.getLogger(RegisterModelStep.class);
+    private static final Logger logger = LogManager.getLogger(ModelGroupStep.class);
 
     private MachineLearningNodeClient mlClient;
 

src/main/java/org/opensearch/flowframework/workflow/RegisterLocalModelStep.java

@@ -0,0 +1,200 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+package org.opensearch.flowframework.workflow;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.opensearch.ExceptionsHelper;
+import org.opensearch.core.action.ActionListener;
+import org.opensearch.core.rest.RestStatus;
+import org.opensearch.flowframework.exception.FlowFrameworkException;
+import org.opensearch.ml.client.MachineLearningNodeClient;
+import org.opensearch.ml.common.model.MLModelConfig;
+import org.opensearch.ml.common.model.MLModelFormat;
+import org.opensearch.ml.common.model.TextEmbeddingModelConfig;
+import org.opensearch.ml.common.model.TextEmbeddingModelConfig.FrameworkType;
+import org.opensearch.ml.common.model.TextEmbeddingModelConfig.TextEmbeddingModelConfigBuilder;
+import org.opensearch.ml.common.transport.register.MLRegisterModelInput;
+import org.opensearch.ml.common.transport.register.MLRegisterModelInput.MLRegisterModelInputBuilder;
+import org.opensearch.ml.common.transport.register.MLRegisterModelResponse;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.concurrent.CompletableFuture;
+import java.util.stream.Stream;
+
+import static org.opensearch.flowframework.common.CommonValue.ALL_CONFIG;
+import static org.opensearch.flowframework.common.CommonValue.DESCRIPTION_FIELD;
+import static org.opensearch.flowframework.common.CommonValue.EMBEDDING_DIMENSION;
+import static org.opensearch.flowframework.common.CommonValue.FRAMEWORK_TYPE;
+import static org.opensearch.flowframework.common.CommonValue.MODEL_CONTENT_HASH_VALUE;
+import static org.opensearch.flowframework.common.CommonValue.MODEL_FORMAT;
+import static org.opensearch.flowframework.common.CommonValue.MODEL_GROUP_ID;
+import static org.opensearch.flowframework.common.CommonValue.MODEL_TYPE;
+import static org.opensearch.flowframework.common.CommonValue.NAME_FIELD;
+import static org.opensearch.flowframework.common.CommonValue.REGISTER_MODEL_STATUS;
+import static org.opensearch.flowframework.common.CommonValue.TASK_ID;
+import static org.opensearch.flowframework.common.CommonValue.URL;
+import static org.opensearch.flowframework.common.CommonValue.VERSION_FIELD;
+
+/**
+ * Step to register a local model
+ */
+public class RegisterLocalModelStep implements WorkflowStep {
+
+    private static final Logger logger = LogManager.getLogger(RegisterLocalModelStep.class);
+
+    private MachineLearningNodeClient mlClient;
+
+    static final String NAME = "register_local_model";
+
+    /**
+     * Instantiate this class
+     * @param mlClient client to instantiate MLClient
+     */
+    public RegisterLocalModelStep(MachineLearningNodeClient mlClient) {
+        this.mlClient = mlClient;
+    }
+
+    @Override
+    public CompletableFuture<WorkflowData> execute(List<WorkflowData> data) {
+
+        CompletableFuture<WorkflowData> registerLocalModelFuture = new CompletableFuture<>();
+
+        ActionListener<MLRegisterModelResponse> actionListener = new ActionListener<>() {
+            @Override
+            public void onResponse(MLRegisterModelResponse mlRegisterModelResponse) {
+                logger.info("Local Model registration task creation successful");
+                registerLocalModelFuture.complete(
+                    new WorkflowData(
+                        Map.ofEntries(
+                            Map.entry(TASK_ID, mlRegisterModelResponse.getTaskId()),
+                            Map.entry(REGISTER_MODEL_STATUS, mlRegisterModelResponse.getStatus())
+                        )
+                    )
+                );
+            }
+
+            @Override
+            public void onFailure(Exception e) {
+                logger.error("Failed to register local model");
+                registerLocalModelFuture.completeExceptionally(new FlowFrameworkException(e.getMessage(), ExceptionsHelper.status(e)));
+            }
+        };
+
+        String modelName = null;
+        String modelVersion = null;
+        String description = null;
+        MLModelFormat modelFormat = null;
+        String modelGroupId = null;
+        String modelContentHashValue = null;
+        String modelType = null;
+        String embeddingDimension = null;
+        FrameworkType frameworkType = null;
+        String allConfig = null;
+        String url = null;
+
+        for (WorkflowData workflowData : data) {
+            Map<String, Object> content = workflowData.getContent();
+
+            for (Entry<String, Object> entry : content.entrySet()) {
+                switch (entry.getKey()) {
+                    case NAME_FIELD:
+                        modelName = (String) content.get(NAME_FIELD);
+                        break;
+                    case VERSION_FIELD:
+                        modelVersion = (String) content.get(VERSION_FIELD);
+                        break;
+                    case DESCRIPTION_FIELD:
+                        description = (String) content.get(DESCRIPTION_FIELD);
+                        break;
+                    case MODEL_FORMAT:
+                        modelFormat = MLModelFormat.from((String) content.get(MODEL_FORMAT));
+                        break;
+                    case MODEL_GROUP_ID:
+                        modelGroupId = (String) content.get(MODEL_GROUP_ID);
+                        break;
+                    case MODEL_TYPE:
+                        modelType = (String) content.get(MODEL_TYPE);
+                        break;
+                    case EMBEDDING_DIMENSION:
+                        embeddingDimension = (String) content.get(EMBEDDING_DIMENSION);
+                        break;
+                    case FRAMEWORK_TYPE:
+                        frameworkType = FrameworkType.from((String) content.get(FRAMEWORK_TYPE));
+                        break;
+                    case ALL_CONFIG:
+                        allConfig = (String) content.get(ALL_CONFIG);
+                        break;
+                    case MODEL_CONTENT_HASH_VALUE:
+                        modelContentHashValue = (String) content.get(MODEL_CONTENT_HASH_VALUE);
+                        break;
+                    case URL:
+                        url = (String) content.get(URL);
+                        break;
+                    default:
+                        break;
+
+                }
+            }
+        }
+
+        if (Stream.of(
+            modelName,
+            modelVersion,
+            modelFormat,
+            modelGroupId,
+            modelType,
+            embeddingDimension,
+            frameworkType,
+            modelContentHashValue,
+            url
+        ).allMatch(x -> x != null)) {
+
+            // Create Model configudation
+            TextEmbeddingModelConfigBuilder modelConfigBuilder = TextEmbeddingModelConfig.builder()
+                .modelType(modelType)
+                .embeddingDimension(Integer.valueOf(embeddingDimension))
+                .frameworkType(frameworkType);
+            if (allConfig != null) {
+                modelConfigBuilder.allConfig(allConfig);
+            }
+            MLModelConfig modelConfig = modelConfigBuilder.build();
+
+            // Create register local model input
+            MLRegisterModelInputBuilder mlInputBuilder = MLRegisterModelInput.builder()
+                .modelName(modelName)
+                .version(modelVersion)
+                .modelFormat(modelFormat)
+                .modelGroupId(modelGroupId)
+                .hashValue(modelContentHashValue)
+                .modelConfig(modelConfig)
+                .url(url);
+            if (description != null) {
+                mlInputBuilder.description(description);
+            }
+
+            MLRegisterModelInput mlInput = mlInputBuilder.build();
+
+            mlClient.register(mlInput, actionListener);
+        } else {
+            registerLocalModelFuture.completeExceptionally(
+                new FlowFrameworkException("Required fields are not provided", RestStatus.BAD_REQUEST)
+            );
+        }
+
+        return registerLocalModelFuture;
+    }
+
+    @Override
+    public String getName() {
+        return NAME;
+    }
+}