[Backport 2.x] Adds Create Ingest Pipeline Step

src/main/java/org/opensearch/flowframework/FlowFrameworkPlugin.java

@@ -17,6 +17,7 @@
 import org.opensearch.env.Environment;
 import org.opensearch.env.NodeEnvironment;
 import org.opensearch.flowframework.workflow.CreateIndex.CreateIndexStep;
+import org.opensearch.flowframework.workflow.CreateIngestPipelineStep;
 import org.opensearch.plugins.Plugin;
 import org.opensearch.repositories.RepositoriesService;
 import org.opensearch.script.ScriptService;
@@ -48,7 +49,8 @@
         Supplier<RepositoriesService> repositoriesServiceSupplier
     ) {
         this.client = client;
+        CreateIngestPipelineStep createIngestPipelineStep = new CreateIngestPipelineStep(client);
         CreateIndexStep createIndexStep = new CreateIndexStep(client);
-        return ImmutableList.of(createIndexStep);
+        return ImmutableList.of(createIngestPipelineStep, createIndexStep);
     }
 }

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

@@ -0,0 +1,191 @@
+/*
+ * 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.action.ingest.PutPipelineRequest;
+import org.opensearch.client.Client;
+import org.opensearch.client.ClusterAdminClient;
+import org.opensearch.common.xcontent.XContentFactory;
+import org.opensearch.common.xcontent.XContentType;
+import org.opensearch.core.action.ActionListener;
+import org.opensearch.core.common.bytes.BytesReference;
+import org.opensearch.core.xcontent.XContentBuilder;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.concurrent.CompletableFuture;
+import java.util.stream.Stream;
+
+/**
+ * Workflow step to create an ingest pipeline
+ */
+public class CreateIngestPipelineStep implements WorkflowStep {
+
+    private static final Logger logger = LogManager.getLogger(CreateIngestPipelineStep.class);
+    private static final String NAME = "create_ingest_pipeline_step";
+
+    // Common pipeline configuration fields
+    private static final String PIPELINE_ID_FIELD = "id";
+    private static final String DESCRIPTION_FIELD = "description";
+    private static final String PROCESSORS_FIELD = "processors";
+    private static final String TYPE_FIELD = "type";
+
+    // Temporary text embedding processor fields
+    private static final String FIELD_MAP = "field_map";
+    private static final String MODEL_ID_FIELD = "model_id";
+    private static final String INPUT_FIELD = "input_field_name";
+    private static final String OUTPUT_FIELD = "output_field_name";
+
+    // Client to store a pipeline in the cluster state
+    private final ClusterAdminClient clusterAdminClient;
+
+    /**
+     * Instantiates a new CreateIngestPipelineStep
+     *
+     * @param client The client to create a pipeline and store workflow data into the global context index
+     */
+    public CreateIngestPipelineStep(Client client) {
+        this.clusterAdminClient = client.admin().cluster();
+    }
+
+    @Override
+    public CompletableFuture<WorkflowData> execute(List<WorkflowData> data) {
+
+        CompletableFuture<WorkflowData> createIngestPipelineFuture = new CompletableFuture<>();
+
+        String pipelineId = null;
+        String description = null;
+        String type = null;
+        String modelId = null;
+        String inputFieldName = null;
+        String outputFieldName = null;
+        BytesReference configuration = null;
+
+        // Extract required content from workflow data and generate the ingest pipeline configuration
+        for (WorkflowData workflowData : data) {
+
+            Map<String, Object> content = workflowData.getContent();
+
+            for (Entry<String, Object> entry : content.entrySet()) {
+                switch (entry.getKey()) {
+                    case PIPELINE_ID_FIELD:
+                        pipelineId = (String) content.get(PIPELINE_ID_FIELD);
+                        break;
+                    case DESCRIPTION_FIELD:
+                        description = (String) content.get(DESCRIPTION_FIELD);
+                        break;
+                    case TYPE_FIELD:
+                        type = (String) content.get(TYPE_FIELD);
+                        break;
+                    case MODEL_ID_FIELD:
+                        modelId = (String) content.get(MODEL_ID_FIELD);
+                        break;
+                    case INPUT_FIELD:
+                        inputFieldName = (String) content.get(INPUT_FIELD);
+                        break;
+                    case OUTPUT_FIELD:
+                        outputFieldName = (String) content.get(OUTPUT_FIELD);
+                        break;
+                    default:
+                        break;
+                }
+            }
+
+            // Determmine if fields have been populated, else iterate over remaining workflow data
+            if (Stream.of(pipelineId, description, modelId, type, inputFieldName, outputFieldName).allMatch(x -> x != null)) {
+                try {
+                    configuration = BytesReference.bytes(
+                        buildIngestPipelineRequestContent(description, modelId, type, inputFieldName, outputFieldName)
+                    );
+                } catch (IOException e) {
+                    logger.error("Failed to create ingest pipeline configuration: " + e.getMessage());
+                    createIngestPipelineFuture.completeExceptionally(e);
+                }
+                break;
+            }
+        }
+
+        if (configuration == null) {
+            // Required workflow data not found
+            createIngestPipelineFuture.completeExceptionally(new Exception("Failed to create ingest pipeline, required inputs not found"));
+        } else {
+            // Create PutPipelineRequest and execute
+            PutPipelineRequest putPipelineRequest = new PutPipelineRequest(pipelineId, configuration, XContentType.JSON);
+            clusterAdminClient.putPipeline(putPipelineRequest, ActionListener.wrap(response -> {
+                logger.info("Created ingest pipeline : " + putPipelineRequest.getId());
+
+                // PutPipelineRequest returns only an AcknowledgeResponse, returning pipelineId instead
+                createIngestPipelineFuture.complete(new WorkflowData(Map.of("pipelineId", putPipelineRequest.getId())));
+
+                // TODO : Use node client to index response data to global context (pending global context index implementation)
+
+            }, exception -> {
+                logger.error("Failed to create ingest pipeline : " + exception.getMessage());
+                createIngestPipelineFuture.completeExceptionally(exception);
+            }));
+        }
+
+        return createIngestPipelineFuture;
+    }
+
+    @Override
+    public String getName() {
+        return NAME;
+    }
+
+    /**
+     * Temporary, generates the ingest pipeline request content for text_embedding processor from workflow data
+     * {
+     *  "description" : "<description>",
+     *  "processors" : [
+     *      {
+     *          "<type>" : {
+     *              "model_id" : "<model_id>",
+     *              "field_map" : {
+     *                  "<input_field_name>" : "<output_field_name>"
+     *          }
+     *      }
+     *  ]
+     * }
+     *
+     * @param description The description of the ingest pipeline configuration
+     * @param modelId The ID of the model that will be used in the embedding interface
+     * @param type The processor type
+     * @param inputFieldName The field name used to cache text for text embeddings
+     * @param outputFieldName The field name in which output text is stored
+     * @throws IOException if the request content fails to be generated
+     * @return the xcontent builder with the formatted ingest pipeline configuration
+     */
+    private XContentBuilder buildIngestPipelineRequestContent(
+        String description,
+        String modelId,
+        String type,
+        String inputFieldName,
+        String outputFieldName
+    ) throws IOException {
+        return XContentFactory.jsonBuilder()
+            .startObject()
+            .field(DESCRIPTION_FIELD, description)
+            .startArray(PROCESSORS_FIELD)
+            .startObject()
+            .startObject(type)
+            .field(MODEL_ID_FIELD, modelId)
+            .startObject(FIELD_MAP)
+            .field(inputFieldName, outputFieldName)
+            .endObject()
+            .endObject()
+            .endObject()
+            .endArray()
+            .endObject();
+    }
+}

src/test/java/org/opensearch/flowframework/workflow/CreateIngestPipeline/CreateIngestPipelineStepTests.java

@@ -0,0 +1,126 @@
+/*
+ * 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.CreateIngestPipeline;
+
+import org.opensearch.action.ingest.PutPipelineRequest;
+import org.opensearch.action.support.master.AcknowledgedResponse;
+import org.opensearch.client.AdminClient;
+import org.opensearch.client.Client;
+import org.opensearch.client.ClusterAdminClient;
+import org.opensearch.core.action.ActionListener;
+import org.opensearch.flowframework.workflow.CreateIngestPipelineStep;
+import org.opensearch.flowframework.workflow.WorkflowData;
+import org.opensearch.test.OpenSearchTestCase;
+
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+
+import org.mockito.ArgumentCaptor;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+public class CreateIngestPipelineStepTests extends OpenSearchTestCase {
+
+    private WorkflowData inputData;
+    private WorkflowData outpuData;
+    private Client client;
+    private AdminClient adminClient;
+    private ClusterAdminClient clusterAdminClient;
+
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+
+        inputData = new WorkflowData(
+            Map.ofEntries(
+                Map.entry("id", "pipelineId"),
+                Map.entry("description", "some description"),
+                Map.entry("type", "text_embedding"),
+                Map.entry("model_id", "model_id"),
+                Map.entry("input_field_name", "inputField"),
+                Map.entry("output_field_name", "outputField")
+            )
+        );
+
+        // Set output data to returned pipelineId
+        outpuData = new WorkflowData(Map.ofEntries(Map.entry("pipelineId", "pipelineId")));
+
+        client = mock(Client.class);
+        adminClient = mock(AdminClient.class);
+        clusterAdminClient = mock(ClusterAdminClient.class);
+
+        when(client.admin()).thenReturn(adminClient);
+        when(adminClient.cluster()).thenReturn(clusterAdminClient);
+    }
+
+    public void testCreateIngestPipelineStep() throws InterruptedException, ExecutionException {
+
+        CreateIngestPipelineStep createIngestPipelineStep = new CreateIngestPipelineStep(client);
+
+        ArgumentCaptor<ActionListener> actionListenerCaptor = ArgumentCaptor.forClass(ActionListener.class);
+        CompletableFuture<WorkflowData> future = createIngestPipelineStep.execute(List.of(inputData));
+
+        assertFalse(future.isDone());
+
+        // Mock put pipeline request execution and return true
+        verify(clusterAdminClient, times(1)).putPipeline(any(PutPipelineRequest.class), actionListenerCaptor.capture());
+        actionListenerCaptor.getValue().onResponse(new AcknowledgedResponse(true));
+
+        assertTrue(future.isDone() && !future.isCompletedExceptionally());
+        assertEquals(outpuData.getContent(), future.get().getContent());
+    }
+
+    public void testCreateIngestPipelineStepFailure() throws InterruptedException {
+
+        CreateIngestPipelineStep createIngestPipelineStep = new CreateIngestPipelineStep(client);
+
+        ArgumentCaptor<ActionListener> actionListenerCaptor = ArgumentCaptor.forClass(ActionListener.class);
+        CompletableFuture<WorkflowData> future = createIngestPipelineStep.execute(List.of(inputData));
+
+        assertFalse(future.isDone());
+
+        // Mock put pipeline request execution and return false
+        verify(clusterAdminClient, times(1)).putPipeline(any(PutPipelineRequest.class), actionListenerCaptor.capture());
+        actionListenerCaptor.getValue().onFailure(new Exception("Failed to create ingest pipeline"));
+
+        assertTrue(future.isDone() && future.isCompletedExceptionally());
+
+        ExecutionException exception = assertThrows(ExecutionException.class, () -> future.get());
+        assertTrue(exception.getCause() instanceof Exception);
+        assertEquals("Failed to create ingest pipeline", exception.getCause().getMessage());
+    }
+
+    public void testMissingData() throws InterruptedException {
+        CreateIngestPipelineStep createIngestPipelineStep = new CreateIngestPipelineStep(client);
+
+        // Data with missing input and output fields
+        WorkflowData incorrectData = new WorkflowData(
+            Map.ofEntries(
+                Map.entry("id", "pipelineId"),
+                Map.entry("description", "some description"),
+                Map.entry("type", "text_embedding"),
+                Map.entry("model_id", "model_id")
+            )
+        );
+
+        CompletableFuture<WorkflowData> future = createIngestPipelineStep.execute(List.of(incorrectData));
+        assertTrue(future.isDone() && future.isCompletedExceptionally());
+
+        ExecutionException exception = assertThrows(ExecutionException.class, () -> future.get());
+        assertTrue(exception.getCause() instanceof Exception);
+        assertEquals("Failed to create ingest pipeline, required inputs not found", exception.getCause().getMessage());
+    }
+
+}