Added workflow step for ReIndex Step

CHANGELOG.md

@@ -15,6 +15,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.1.0/)
 ## [Unreleased 2.x](https://github.com/opensearch-project/flow-framework/compare/2.14...2.x)
 ### Features
 ### Enhancements
+- Add Workflow Step for Reindex from source index to destination ([#718](https://github.com/opensearch-project/flow-framework/pull/718))
 ### Bug Fixes
 - Add user mapping to Workflow State index ([#705](https://github.com/opensearch-project/flow-framework/pull/705))
 

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

@@ -174,7 +174,10 @@ private CommonValue() {}
     public static final String DELAY_FIELD = "delay";
     /** Model Interface Field */
     public static final String INTERFACE_FIELD = "interface";
-
+    /** The source index field for reindex */
+    public static final String SOURCE_INDICES = "source_indices";
+    /** The destination index field for reindex */
+    public static final String DESTINATION_INDEX = "destination_index";
     /*
      * Constants associated with resource provisioning / state
      */

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

@@ -27,6 +27,7 @@
 import org.opensearch.flowframework.workflow.RegisterLocalSparseEncodingModelStep;
 import org.opensearch.flowframework.workflow.RegisterModelGroupStep;
 import org.opensearch.flowframework.workflow.RegisterRemoteModelStep;
+import org.opensearch.flowframework.workflow.ReindexStep;
 import org.opensearch.flowframework.workflow.UndeployModelStep;
 
 import java.util.Set;
@@ -58,6 +59,8 @@ public enum WorkflowResources {
     CREATE_SEARCH_PIPELINE(CreateSearchPipelineStep.NAME, WorkflowResources.PIPELINE_ID, null), // TODO delete step
     /** Workflow steps for creating an index and associated created resource */
     CREATE_INDEX(CreateIndexStep.NAME, WorkflowResources.INDEX_NAME, NoOpStep.NAME),
+    /** Workflow steps for reindex a source index to destination index and associated created resource */
+    REINDEX(ReindexStep.NAME, WorkflowResources.INDEX_NAME, NoOpStep.NAME),
     /** Workflow steps for registering/deleting an agent and the associated created resource */
     REGISTER_AGENT(RegisterAgentStep.NAME, WorkflowResources.AGENT_ID, DeleteAgentStep.NAME);
 

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

@@ -0,0 +1,175 @@
+/*
+ * 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.action.support.PlainActionFuture;
+import org.opensearch.client.Client;
+import org.opensearch.common.Booleans;
+import org.opensearch.core.action.ActionListener;
+import org.opensearch.core.common.Strings;
+import org.opensearch.core.rest.RestStatus;
+import org.opensearch.flowframework.exception.FlowFrameworkException;
+import org.opensearch.flowframework.exception.WorkflowStepException;
+import org.opensearch.flowframework.indices.FlowFrameworkIndicesHandler;
+import org.opensearch.flowframework.util.ParseUtils;
+import org.opensearch.index.reindex.BulkByScrollResponse;
+import org.opensearch.index.reindex.ReindexAction;
+import org.opensearch.index.reindex.ReindexRequest;
+
+import java.util.Map;
+import java.util.Set;
+
+import static org.opensearch.flowframework.common.CommonValue.DESTINATION_INDEX;
+import static org.opensearch.flowframework.common.CommonValue.SOURCE_INDICES;
+
+/**
+ * Step to reindex
+ */
+public class ReindexStep implements WorkflowStep {
+
+    private static final Logger logger = LogManager.getLogger(ReindexStep.class);
+    private final Client client;
+    private final FlowFrameworkIndicesHandler flowFrameworkIndicesHandler;
+
+    /** The name of this step, used as a key in the template and the {@link WorkflowStepFactory} */
+    public static final String NAME = "reindex";
+    /** The refresh field for reindex */
+    private static final String REFRESH = "refresh";
+    /** The requests_per_second field for reindex */
+    private static final String REQUESTS_PER_SECOND = "requests_per_second";
+    /** The require_alias field for reindex */
+    private static final String REQUIRE_ALIAS = "require_alias";
+    /** The slices field for reindex */
+    private static final String SLICES = "slices";
+    /** The max_docs field for reindex */
+    private static final String MAX_DOCS = "max_docs";
+
+    /**
+     * Instantiate this class
+     *
+     * @param client Client to create an index
+     * @param flowFrameworkIndicesHandler FlowFrameworkIndicesHandler class to update system indices
+     */
+    public ReindexStep(Client client, FlowFrameworkIndicesHandler flowFrameworkIndicesHandler) {
+        this.client = client;
+        this.flowFrameworkIndicesHandler = flowFrameworkIndicesHandler;
+    }
+
+    @Override
+    public PlainActionFuture<WorkflowData> execute(
+        String currentNodeId,
+        WorkflowData currentNodeInputs,
+        Map<String, WorkflowData> outputs,
+        Map<String, String> previousNodeInputs,
+        Map<String, String> params
+    ) {
+
+        PlainActionFuture<WorkflowData> reIndexFuture = PlainActionFuture.newFuture();
+
+        Set<String> requiredKeys = Set.of(SOURCE_INDICES, DESTINATION_INDEX);
+
+        Set<String> optionalKeys = Set.of(REFRESH, REQUESTS_PER_SECOND, REQUIRE_ALIAS, SLICES, MAX_DOCS);
+
+        try {
+            Map<String, Object> inputs = ParseUtils.getInputsFromPreviousSteps(
+                requiredKeys,
+                optionalKeys,
+                currentNodeInputs,
+                outputs,
+                previousNodeInputs,
+                params
+            );
+
+            String sourceIndices = (String) inputs.get(SOURCE_INDICES);
+            String destinationIndex = (String) inputs.get(DESTINATION_INDEX);
+            Boolean refresh = inputs.containsKey(REFRESH) ? Booleans.parseBoolean(inputs.get(REFRESH).toString()) : null;
+            Float requestsPerSecond = inputs.containsKey(REQUESTS_PER_SECOND)
+                ? Float.parseFloat(inputs.get(REQUESTS_PER_SECOND).toString())
+                : Float.POSITIVE_INFINITY;
+            Boolean requireAlias = inputs.containsKey(REQUIRE_ALIAS) ? Booleans.parseBoolean(inputs.get(REQUIRE_ALIAS).toString()) : null;
+            Integer slices = (Integer) inputs.get(SLICES);
+            Integer maxDocs = (Integer) inputs.get(MAX_DOCS);
+
+            ReindexRequest reindexRequest = new ReindexRequest().setSourceIndices(Strings.splitStringByCommaToArray(sourceIndices))
+                .setDestIndex(destinationIndex);
+
+            if (refresh != null) {
+                reindexRequest.setRefresh(refresh);
+            }
+            if (requestsPerSecond != null) {
+                reindexRequest.setRequestsPerSecond(requestsPerSecond);
+            }
+            if (requireAlias != null) {
+                reindexRequest.setRequireAlias(requireAlias);
+            }
+            if (maxDocs != null) {
+                reindexRequest.setMaxDocs(maxDocs);
+            }
+            if (slices != null) {
+                reindexRequest.setSlices(slices);
+            }
+
+            ActionListener<BulkByScrollResponse> actionListener = new ActionListener<>() {
+
+                @Override
+                public void onResponse(BulkByScrollResponse bulkByScrollResponse) {
+                    logger.info("Reindex from source: {} to destination {}", sourceIndices, destinationIndex);
+                    try {
+                        if (bulkByScrollResponse.getBulkFailures().isEmpty() && bulkByScrollResponse.getSearchFailures().isEmpty()) {
+                            reIndexFuture.onResponse(
+                                new WorkflowData(
+                                    Map.of(
+                                        NAME,
+                                        Map.ofEntries(
+                                            Map.entry(DESTINATION_INDEX, destinationIndex),
+                                            Map.entry(SOURCE_INDICES, sourceIndices)
+                                        )
+                                    ),
+                                    currentNodeInputs.getWorkflowId(),
+                                    currentNodeInputs.getNodeId()
+                                )
+                            );
+                        } else {
+                            String errorMessage = "Failed to get bulk response " + bulkByScrollResponse.getBulkFailures();
+                            reIndexFuture.onFailure(new FlowFrameworkException(errorMessage, RestStatus.BAD_REQUEST));
+                        }
+                    } catch (Exception e) {
+                        String errorMessage = "Failed to parse and update new created resource";
+                        logger.error(errorMessage, e);
+                        reIndexFuture.onFailure(new FlowFrameworkException(errorMessage, ExceptionsHelper.status(e)));
+                    }
+                }
+
+                @Override
+                public void onFailure(Exception e) {
+                    String errorMessage = "Failed to reindex from source " + sourceIndices + " to " + destinationIndex;
+                    logger.error(errorMessage, e);
+                    reIndexFuture.onFailure(new WorkflowStepException(errorMessage, ExceptionsHelper.status(e)));
+                }
+            };
+
+            client.execute(ReindexAction.INSTANCE, reindexRequest, actionListener);
+
+        } catch (IllegalArgumentException iae) {
+            reIndexFuture.onFailure(new WorkflowStepException(iae.getMessage(), RestStatus.BAD_REQUEST));
+        } catch (Exception e) {
+            reIndexFuture.onFailure(e);
+        }
+
+        return reIndexFuture;
+    }
+
+    @Override
+    public String getName() {
+        return NAME;
+    }
+}

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

@@ -34,6 +34,7 @@
 import static org.opensearch.flowframework.common.CommonValue.CONFIGURATIONS;
 import static org.opensearch.flowframework.common.CommonValue.CREDENTIAL_FIELD;
 import static org.opensearch.flowframework.common.CommonValue.DESCRIPTION_FIELD;
+import static org.opensearch.flowframework.common.CommonValue.DESTINATION_INDEX;
 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.FUNCTION_NAME;
@@ -47,6 +48,7 @@
 import static org.opensearch.flowframework.common.CommonValue.PIPELINE_ID;
 import static org.opensearch.flowframework.common.CommonValue.PROTOCOL_FIELD;
 import static org.opensearch.flowframework.common.CommonValue.REGISTER_MODEL_STATUS;
+import static org.opensearch.flowframework.common.CommonValue.SOURCE_INDICES;
 import static org.opensearch.flowframework.common.CommonValue.SUCCESS;
 import static org.opensearch.flowframework.common.CommonValue.TOOLS_FIELD;
 import static org.opensearch.flowframework.common.CommonValue.TYPE;
@@ -84,6 +86,7 @@ public WorkflowStepFactory(
     ) {
         stepMap.put(NoOpStep.NAME, NoOpStep::new);
         stepMap.put(CreateIndexStep.NAME, () -> new CreateIndexStep(client, flowFrameworkIndicesHandler));
+        stepMap.put(ReindexStep.NAME, () -> new ReindexStep(client, flowFrameworkIndicesHandler));
         stepMap.put(
             RegisterLocalCustomModelStep.NAME,
             () -> new RegisterLocalCustomModelStep(threadPool, mlClient, flowFrameworkIndicesHandler, flowFrameworkSettings)
@@ -125,6 +128,9 @@ public enum WorkflowSteps {
         /** Create Index Step */
         CREATE_INDEX(CreateIndexStep.NAME, List.of(INDEX_NAME, CONFIGURATIONS), List.of(INDEX_NAME), Collections.emptyList(), null),
 
+        /** Create ReIndex Step */
+        REINDEX(ReindexStep.NAME, List.of(SOURCE_INDICES, DESTINATION_INDEX), List.of(ReindexStep.NAME), Collections.emptyList(), null),
+
         /** Create Connector Step */
         CREATE_CONNECTOR(
             CreateConnectorStep.NAME,

src/test/java/org/opensearch/flowframework/model/WorkflowValidatorTests.java

@@ -46,7 +46,7 @@ public void testParseWorkflowValidator() throws IOException {
 
         WorkflowValidator validator = new WorkflowValidator(workflowStepValidators);
 
-        assertEquals(17, validator.getWorkflowStepValidators().size());
+        assertEquals(18, validator.getWorkflowStepValidators().size());
 
         assertTrue(validator.getWorkflowStepValidators().keySet().contains("create_connector"));
         assertEquals(7, validator.getWorkflowStepValidators().get("create_connector").getInputs().size());