[rule based autotagging] Add Create Rule API Logic

CHANGELOG.md

@@ -9,6 +9,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - [Rule based auto-tagging] Add get rule API ([#17336](https://github.com/opensearch-project/OpenSearch/pull/17336))
 - [Rule based auto-tagging] Add Delete Rule API ([#18184](https://github.com/opensearch-project/OpenSearch/pull/18184))
 - Add paginated wlm/stats API ([#17638](https://github.com/opensearch-project/OpenSearch/pull/17638))
+- [Rule based auto-tagging] Add Create rule API ([#17792](https://github.com/opensearch-project/OpenSearch/pull/17792))
 - Implement parallel shard refresh behind cluster settings ([#17782](https://github.com/opensearch-project/OpenSearch/pull/17782))
 - Bump OpenSearch Core main branch to 3.0.0 ([#18039](https://github.com/opensearch-project/OpenSearch/pull/18039))
 - [Rule based Auto-tagging] Add wlm `ActionFilter` ([#17791](https://github.com/opensearch-project/OpenSearch/pull/17791))

modules/autotagging-commons/build.gradle

@@ -6,7 +6,6 @@
  * compatible open source license.
  */
 
-
 opensearchplugin {
   name = "rule-framework"
   description = 'OpenSearch Rule Framework plugin'

modules/autotagging-commons/common/src/main/java/org/opensearch/rule/CreateRuleRequest.java

@@ -0,0 +1,74 @@
+/*
+ * 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.rule;
+
+import org.opensearch.action.ActionRequest;
+import org.opensearch.action.ActionRequestValidationException;
+import org.opensearch.core.common.io.stream.StreamInput;
+import org.opensearch.core.common.io.stream.StreamOutput;
+import org.opensearch.rule.autotagging.Rule;
+
+import java.io.IOException;
+
+/**
+ * A request for create Rule
+ * Example request:
+ * curl -X PUT "localhost:9200/_rules/{featureType}/" -H 'Content-Type: application/json' -d '
+ * {
+ *      "description": "description1",
+ *      "attribute_name": ["log*", "event*"],
+ *      "feature_type": "poOiU851RwyLYvV5lbvv5w"
+ * }'
+ * @opensearch.experimental
+ */
+public class CreateRuleRequest extends ActionRequest {
+    private final Rule rule;
+
+    /**
+     * constructor for CreateRuleRequest
+     * @param rule the rule to create
+     */
+    public CreateRuleRequest(Rule rule) {
+        this.rule = rule;
+    }
+
+    /**
+     * Constructs a CreateRuleRequest from a StreamInput for deserialization
+     * @param in - The {@link StreamInput} instance to read from.
+     */
+    public CreateRuleRequest(StreamInput in) throws IOException {
+        super(in);
+        rule = new Rule(in);
+    }
+
+    @Override
+    public ActionRequestValidationException validate() {
+        try {
+            rule.getFeatureType().getFeatureValueValidator().validate(rule.getFeatureValue());
+            return null;
+        } catch (Exception e) {
+            ActionRequestValidationException validationException = new ActionRequestValidationException();
+            validationException.addValidationError("Validation failed: " + e.getMessage());
+            return validationException;
+        }
+    }
+
+    @Override
+    public void writeTo(StreamOutput out) throws IOException {
+        super.writeTo(out);
+        rule.writeTo(out);
+    }
+
+    /**
+     * rule getter
+     */
+    public Rule getRule() {
+        return rule;
+    }
+}

modules/autotagging-commons/common/src/main/java/org/opensearch/rule/CreateRuleResponse.java

@@ -0,0 +1,76 @@
+/*
+ * 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.rule;
+
+import org.opensearch.core.action.ActionResponse;
+import org.opensearch.core.common.io.stream.StreamInput;
+import org.opensearch.core.common.io.stream.StreamOutput;
+import org.opensearch.core.xcontent.ToXContent;
+import org.opensearch.core.xcontent.ToXContentObject;
+import org.opensearch.core.xcontent.XContentBuilder;
+import org.opensearch.rule.autotagging.Rule;
+
+import java.io.IOException;
+import java.util.Map;
+
+import static org.opensearch.rule.autotagging.Rule._ID_STRING;
+
+/**
+ * Response for the create API for Rule
+ * Example response:
+ * {
+ *    "_id":"wi6VApYBoX5wstmtU_8l",
+ *    "description":"description1",
+ *    "index_pattern":["log*", "uvent*"],
+ *    "workload_group":"poOiU851RwyLYvV5lbvv5w",
+ *    "updated_at":"2025-04-04T20:54:22.406Z"
+ * }
+ * @opensearch.experimental
+ */
+public class CreateRuleResponse extends ActionResponse implements ToXContent, ToXContentObject {
+    private final String _id;
+    private final Rule rule;
+
+    /**
+     * contructor for CreateRuleResponse
+     * @param id - the id for the rule created
+     * @param rule - the rule created
+     */
+    public CreateRuleResponse(String id, final Rule rule) {
+        this._id = id;
+        this.rule = rule;
+    }
+
+    /**
+     * Constructs a CreateRuleResponse from a StreamInput for deserialization
+     * @param in - The {@link StreamInput} instance to read from.
+     */
+    public CreateRuleResponse(StreamInput in) throws IOException {
+        _id = in.readString();
+        rule = new Rule(in);
+    }
+
+    @Override
+    public void writeTo(StreamOutput out) throws IOException {
+        out.writeString(_id);
+        rule.writeTo(out);
+    }
+
+    @Override
+    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
+        return rule.toXContent(builder, new MapParams(Map.of(_ID_STRING, _id)));
+    }
+
+    /**
+     * rule getter
+     */
+    public Rule getRule() {
+        return rule;
+    }
+}

modules/autotagging-commons/common/src/main/java/org/opensearch/rule/GetRuleRequest.java

@@ -26,10 +26,9 @@
 /**
  * A request for get Rule
  * Example Request:
- * The endpoint "localhost:9200/_wlm/rule" is specific to the Workload Management feature to manage rules
- * curl -X GET "localhost:9200/_wlm/rule" - get all rules
- * curl -X GET "localhost:9200/_wlm/rule/{_id}" - get single rule by id
- * curl -X GET "localhost:9200/_wlm/rule?index_pattern=a,b" - get all rules containing attribute index_pattern as a or b
+ * curl -X GET "localhost:9200/_rules/{featureType}/" - get all rules for {featureType}
+ * curl -X GET "localhost:9200/_rules/{featureType}/{_id}" - get single rule by id
+ * curl -X GET "localhost:9200/_rules/{featureType}?index_pattern=a,b" - get all rules containing attribute index_pattern as a or b for {featureType}
  * @opensearch.experimental
  */
 @ExperimentalApi

modules/autotagging-commons/common/src/main/java/org/opensearch/rule/GetRuleResponse.java

@@ -29,9 +29,9 @@
  *     "rules": [
  *         {
  *             "_id": "z1MJApUB0zgMcDmz-UQq",
- *             "description": "Rule for tagging query_group_id to index123"
+ *             "description": "Rule for tagging workload_group_id to index123"
  *             "index_pattern": ["index123"],
- *             "query_group": "query_group_id",
+ *             "workload_group": "workload_group_id",
  *             "updated_at": "2025-02-14T01:19:22.589Z"
  *         },
  *         ...

modules/autotagging-commons/common/src/main/java/org/opensearch/rule/RulePersistenceService.java

@@ -17,6 +17,13 @@
  */
 public interface RulePersistenceService {
 
+    /**
+     * Create rules based on the provided request.
+     * @param request The request containing the details for creating the rule.
+     * @param listener The listener that will handle the response or failure.
+     */
+    void createRule(CreateRuleRequest request, ActionListener<CreateRuleResponse> listener);
+
     /**
      * Get rules based on the provided request.
      * @param request The request containing the details for retrieving the rule.

modules/autotagging-commons/common/src/main/java/org/opensearch/rule/RuleRoutingService.java

@@ -0,0 +1,25 @@
+/*
+ * 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.rule;
+
+import org.opensearch.core.action.ActionListener;
+
+/**
+ * Interface that handles rule routing logic
+ * @opensearch.experimental
+ */
+public interface RuleRoutingService {
+
+    /**
+     * Handles a create rule request by routing it to the appropriate node.
+     * @param request the create rule request
+     * @param listener listener to handle the final response
+     */
+    void handleCreateRuleRequest(CreateRuleRequest request, ActionListener<CreateRuleResponse> listener);
+}

modules/autotagging-commons/common/src/main/java/org/opensearch/rule/RuleUtils.java

@@ -0,0 +1,67 @@
+/*
+ * 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.rule;
+
+import org.opensearch.common.annotation.ExperimentalApi;
+import org.opensearch.rule.autotagging.Attribute;
+import org.opensearch.rule.autotagging.Rule;
+
+import java.util.Collections;
+import java.util.Map;
+import java.util.Optional;
+import java.util.Set;
+
+/**
+ * Utility class for operations related to {@link Rule} objects.
+ * @opensearch.experimental
+ */
+@ExperimentalApi
+public class RuleUtils {
+
+    /**
+     * constructor for RuleUtils
+     */
+    public RuleUtils() {}
+
+    /**
+     * Checks if a duplicate rule exists and returns its id.
+     * Two rules are considered to be duplicate when meeting all the criteria below
+     * 1. They have the same feature type
+     * 2. They have the exact same attributes
+     * 3. For each attribute, the sets of values must intersect — i.e., at least one common value must exist
+     *  between the current rule and the one being checked.
+     *
+     * @param rule The rule to be validated against ruleMap.
+     * @param ruleMap This map contains existing rules to be checked
+     */
+    public static Optional<String> getDuplicateRuleId(Rule rule, Map<String, Rule> ruleMap) {
+        Map<Attribute, Set<String>> targetAttributeMap = rule.getAttributeMap();
+        for (Map.Entry<String, Rule> entry : ruleMap.entrySet()) {
+            Rule currRule = entry.getValue();
+            Map<Attribute, Set<String>> existingAttributeMap = currRule.getAttributeMap();
+
+            if (rule.getFeatureType() != currRule.getFeatureType() || targetAttributeMap.size() != existingAttributeMap.size()) {
+                continue;
+            }
+            boolean allAttributesIntersect = true;
+            for (Attribute attribute : targetAttributeMap.keySet()) {
+                Set<String> targetAttributeValues = targetAttributeMap.get(attribute);
+                Set<String> existingAttributeValues = existingAttributeMap.get(attribute);
+                if (existingAttributeValues == null || Collections.disjoint(targetAttributeValues, existingAttributeValues)) {
+                    allAttributesIntersect = false;
+                    break;
+                }
+            }
+            if (allAttributesIntersect) {
+                return Optional.of(entry.getKey());
+            }
+        }
+        return Optional.empty();
+    }
+}

modules/autotagging-commons/common/src/main/java/org/opensearch/rule/autotagging/AutoTaggingRegistry.java

@@ -59,6 +59,9 @@ private static void validateFeatureType(FeatureType featureType) {
                 "Feature type name " + name + " should not be null, empty or have more than  " + MAX_FEATURE_TYPE_NAME_LENGTH + "characters"
             );
         }
+        if (featureType.getFeatureValueValidator() == null) {
+            throw new IllegalStateException("FeatureValueValidator is not defined for feature type " + name);
+        }
     }
 
     /**

modules/autotagging-commons/common/src/main/java/org/opensearch/rule/autotagging/FeatureType.java

@@ -17,13 +17,11 @@
 
 /**
  * Represents a feature type within the auto-tagging feature. Feature types define different categories of
- * characteristics that can be used for tagging and classification. Implementations of this interface are
- * responsible for registering feature types in {@link AutoTaggingRegistry}. Implementations must ensure that
+ * characteristics that can be used for tagging and classification. Implementations must ensure that
  * feature types are uniquely identifiable by their class and name.
  *
  * Implementers should follow these guidelines:
  * Feature types should be singletons and managed centrally to avoid duplicates.
- * {@link #registerFeatureType()} must be called during initialization to ensure the feature type is available.
  *
  * @opensearch.experimental
  */
@@ -49,6 +47,16 @@
      */
     Map<String, Attribute> getAllowedAttributesRegistry();
 
+    /**
+     * returns the validator for feature value
+     */
+    default FeatureValueValidator getFeatureValueValidator() {
+        return new FeatureValueValidator() {
+            @Override
+            public void validate(String featureValue) {}
+        };
+    }
+
     /**
      * returns max attribute values
      * @return
@@ -65,11 +73,6 @@
         return DEFAULT_MAX_ATTRIBUTE_VALUE_LENGTH;
     }
 
-    /**
-     * makes the feature type usable and available to framework plugin
-     */
-    void registerFeatureType();
-
     /**
      * checks the validity of the input attribute
      * @param attribute

modules/autotagging-commons/common/src/main/java/org/opensearch/rule/autotagging/FeatureValueValidator.java

@@ -0,0 +1,22 @@
+/*
+ * 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.rule.autotagging;
+
+/**
+ * Interface for validating a feature value against pre-defined values (such as
+ * values from the index, cluster state, etc.) for a specific feature type.
+ * @opensearch.experimental
+ */
+public interface FeatureValueValidator {
+    /**
+     * Validates the given feature value.
+     * @param featureValue the value to validate
+     */
+    void validate(String featureValue);
+}