Added a common settings class to initialize plugin settings

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

@@ -24,7 +24,7 @@
 import org.opensearch.core.xcontent.NamedXContentRegistry;
 import org.opensearch.env.Environment;
 import org.opensearch.env.NodeEnvironment;
-import org.opensearch.flowframework.common.FlowFrameworkFeatureEnabledSetting;
+import org.opensearch.flowframework.common.FlowFrameworkSettings;
 import org.opensearch.flowframework.indices.FlowFrameworkIndicesHandler;
 import org.opensearch.flowframework.rest.RestCreateWorkflowAction;
 import org.opensearch.flowframework.rest.RestDeleteWorkflowAction;
@@ -82,7 +82,7 @@
  */
 public class FlowFrameworkPlugin extends Plugin implements ActionPlugin {
 
-    private FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting;
+    private FlowFrameworkSettings flowFrameworkSettings;
 
     private ClusterService clusterService;
 
@@ -107,24 +107,24 @@ public Collection<Object> createComponents(
     ) {
         Settings settings = environment.settings();
         this.clusterService = clusterService;
-        flowFrameworkFeatureEnabledSetting = new FlowFrameworkFeatureEnabledSetting(clusterService, settings);
+        flowFrameworkSettings = new FlowFrameworkSettings(clusterService, settings);
         MachineLearningNodeClient mlClient = new MachineLearningNodeClient(client);
         EncryptorUtils encryptorUtils = new EncryptorUtils(clusterService, client);
         FlowFrameworkIndicesHandler flowFrameworkIndicesHandler = new FlowFrameworkIndicesHandler(client, clusterService, encryptorUtils);
         WorkflowStepFactory workflowStepFactory = new WorkflowStepFactory(
-            settings,
             threadPool,
             clusterService,
             client,
             mlClient,
-            flowFrameworkIndicesHandler
+            flowFrameworkIndicesHandler,
+            flowFrameworkSettings
         );
         WorkflowProcessSorter workflowProcessSorter = new WorkflowProcessSorter(
             workflowStepFactory,
             threadPool,
             clusterService,
             client,
-            settings
+            flowFrameworkSettings
         );
 
         return List.of(workflowStepFactory, workflowProcessSorter, encryptorUtils, flowFrameworkIndicesHandler);
@@ -141,14 +141,14 @@ public List<RestHandler> getRestHandlers(
         Supplier<DiscoveryNodes> nodesInCluster
     ) {
         return List.of(
-            new RestCreateWorkflowAction(flowFrameworkFeatureEnabledSetting, settings, clusterService),
-            new RestDeleteWorkflowAction(flowFrameworkFeatureEnabledSetting),
-            new RestProvisionWorkflowAction(flowFrameworkFeatureEnabledSetting),
-            new RestDeprovisionWorkflowAction(flowFrameworkFeatureEnabledSetting),
-            new RestSearchWorkflowAction(flowFrameworkFeatureEnabledSetting),
-            new RestGetWorkflowStateAction(flowFrameworkFeatureEnabledSetting),
-            new RestGetWorkflowAction(flowFrameworkFeatureEnabledSetting),
-            new RestSearchWorkflowStateAction(flowFrameworkFeatureEnabledSetting)
+            new RestCreateWorkflowAction(flowFrameworkSettings, settings, clusterService),
+            new RestDeleteWorkflowAction(flowFrameworkSettings),
+            new RestProvisionWorkflowAction(flowFrameworkSettings),
+            new RestDeprovisionWorkflowAction(flowFrameworkSettings),
+            new RestSearchWorkflowAction(flowFrameworkSettings),
+            new RestGetWorkflowStateAction(flowFrameworkSettings),
+            new RestGetWorkflowAction(flowFrameworkSettings),
+            new RestSearchWorkflowStateAction(flowFrameworkSettings)
         );
     }
 

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

@@ -8,13 +8,19 @@
  */
 package org.opensearch.flowframework.common;
 
+import org.opensearch.cluster.service.ClusterService;
 import org.opensearch.common.settings.Setting;
+import org.opensearch.common.settings.Settings;
 import org.opensearch.common.unit.TimeValue;
 
 /** The common settings of flow framework  */
 public class FlowFrameworkSettings {
 
-    private FlowFrameworkSettings() {}
+    private volatile Boolean isFlowFrameworkEnabled;
+    /** The maximum number of transport request retries */
+    private volatile Integer maxRetry;
+    /** Max workflow steps that can be created*/
+    private volatile Integer maxWorkflowSteps;
 
     /** The upper limit of max workflows that can be created  */
     public static final int MAX_WORKFLOWS_LIMIT = 10000;
@@ -65,4 +71,45 @@ private FlowFrameworkSettings() {}
         Setting.Property.NodeScope,
         Setting.Property.Dynamic
     );
+
+    /**
+     * Instantiate this class.
+     *
+     * @param clusterService OpenSearch cluster service
+     * @param settings OpenSearch settings
+     */
+    public FlowFrameworkSettings(ClusterService clusterService, Settings settings) {
+        // Currently this is just an on/off switch for the entire plugin's API.
+        // If desired more fine-tuned feature settings can be added below.
+        this.isFlowFrameworkEnabled = FLOW_FRAMEWORK_ENABLED.get(settings);
+        this.maxRetry = MAX_GET_TASK_REQUEST_RETRY.get(settings);
+        this.maxWorkflowSteps = MAX_WORKFLOW_STEPS.get(settings);
+        clusterService.getClusterSettings().addSettingsUpdateConsumer(FLOW_FRAMEWORK_ENABLED, it -> isFlowFrameworkEnabled = it);
+        clusterService.getClusterSettings().addSettingsUpdateConsumer(MAX_GET_TASK_REQUEST_RETRY, it -> maxRetry = it);
+        clusterService.getClusterSettings().addSettingsUpdateConsumer(MAX_WORKFLOW_STEPS, it -> maxWorkflowSteps = it);
+    }
+
+    /**
+     * Whether the flow framework feature is enabled. If disabled, no REST APIs will be availble.
+     * @return whether Flow Framework is enabled.
+     */
+    public boolean isFlowFrameworkEnabled() {
+        return isFlowFrameworkEnabled;
+    }
+
+    /**
+     * Getter for max retry count
+     * @return count of max retry
+     */
+    public Integer getMaxRetry() {
+        return maxRetry;
+    }
+
+    /**
+     * Getter for max workflow steps
+     * @return count of steps
+     */
+    public Integer getMaxWorkflowSteps() {
+        return maxWorkflowSteps;
+    }
 }

src/main/java/org/opensearch/flowframework/rest/AbstractSearchWorkflowAction.java

@@ -15,7 +15,7 @@
 import org.opensearch.core.rest.RestStatus;
 import org.opensearch.core.xcontent.ToXContent;
 import org.opensearch.core.xcontent.ToXContentObject;
-import org.opensearch.flowframework.common.FlowFrameworkFeatureEnabledSetting;
+import org.opensearch.flowframework.common.FlowFrameworkSettings;
 import org.opensearch.flowframework.exception.FlowFrameworkException;
 import org.opensearch.rest.BaseRestHandler;
 import org.opensearch.rest.BytesRestResponse;
@@ -48,7 +48,7 @@ public abstract class AbstractSearchWorkflowAction<T extends ToXContentObject> e
     /** Search action type*/
     protected final ActionType<SearchResponse> actionType;
     /** Settings to enable FlowFramework API*/
-    protected final FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting;
+    protected final FlowFrameworkSettings flowFrameworkFeatureEnabledSetting;
 
     /**
      * Instantiates a new AbstractSearchWorkflowAction
@@ -63,7 +63,7 @@ public AbstractSearchWorkflowAction(
         String index,
         Class<T> clazz,
         ActionType<SearchResponse> actionType,
-        FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting
+        FlowFrameworkSettings flowFrameworkFeatureEnabledSetting
     ) {
         this.urlPaths = urlPaths;
         this.index = index;

src/main/java/org/opensearch/flowframework/rest/RestCreateWorkflowAction.java

@@ -18,7 +18,7 @@
 import org.opensearch.core.xcontent.ToXContent;
 import org.opensearch.core.xcontent.XContentBuilder;
 import org.opensearch.core.xcontent.XContentParser;
-import org.opensearch.flowframework.common.FlowFrameworkFeatureEnabledSetting;
+import org.opensearch.flowframework.common.FlowFrameworkSettings;
 import org.opensearch.flowframework.exception.FlowFrameworkException;
 import org.opensearch.flowframework.model.Template;
 import org.opensearch.flowframework.transport.CreateWorkflowAction;
@@ -45,7 +45,7 @@ public class RestCreateWorkflowAction extends AbstractWorkflowAction {
     private static final Logger logger = LogManager.getLogger(RestCreateWorkflowAction.class);
     private static final String CREATE_WORKFLOW_ACTION = "create_workflow_action";
 
-    private FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting;
+    private FlowFrameworkSettings flowFrameworkFeatureEnabledSetting;
 
     /**
      * Instantiates a new RestCreateWorkflowAction
@@ -54,7 +54,7 @@ public class RestCreateWorkflowAction extends AbstractWorkflowAction {
      * @param clusterService clusterService
      */
     public RestCreateWorkflowAction(
-        FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting,
+        FlowFrameworkSettings flowFrameworkFeatureEnabledSetting,
         Settings settings,
         ClusterService clusterService
     ) {

src/main/java/org/opensearch/flowframework/rest/RestDeleteWorkflowAction.java

@@ -16,7 +16,7 @@
 import org.opensearch.core.rest.RestStatus;
 import org.opensearch.core.xcontent.ToXContent;
 import org.opensearch.core.xcontent.XContentBuilder;
-import org.opensearch.flowframework.common.FlowFrameworkFeatureEnabledSetting;
+import org.opensearch.flowframework.common.FlowFrameworkSettings;
 import org.opensearch.flowframework.exception.FlowFrameworkException;
 import org.opensearch.flowframework.transport.DeleteWorkflowAction;
 import org.opensearch.flowframework.transport.WorkflowRequest;
@@ -39,13 +39,13 @@ public class RestDeleteWorkflowAction extends BaseRestHandler {
 
     private static final String DELETE_WORKFLOW_ACTION = "delete_workflow";
     private static final Logger logger = LogManager.getLogger(RestDeleteWorkflowAction.class);
-    private FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting;
+    private FlowFrameworkSettings flowFrameworkFeatureEnabledSetting;
 
     /**
      * Instantiates a new RestDeleteWorkflowAction
      * @param flowFrameworkFeatureEnabledSetting Whether this API is enabled
      */
-    public RestDeleteWorkflowAction(FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting) {
+    public RestDeleteWorkflowAction(FlowFrameworkSettings flowFrameworkFeatureEnabledSetting) {
         this.flowFrameworkFeatureEnabledSetting = flowFrameworkFeatureEnabledSetting;
     }
 

src/main/java/org/opensearch/flowframework/rest/RestDeprovisionWorkflowAction.java

@@ -16,7 +16,7 @@
 import org.opensearch.core.rest.RestStatus;
 import org.opensearch.core.xcontent.ToXContent;
 import org.opensearch.core.xcontent.XContentBuilder;
-import org.opensearch.flowframework.common.FlowFrameworkFeatureEnabledSetting;
+import org.opensearch.flowframework.common.FlowFrameworkSettings;
 import org.opensearch.flowframework.exception.FlowFrameworkException;
 import org.opensearch.flowframework.transport.DeprovisionWorkflowAction;
 import org.opensearch.flowframework.transport.WorkflowRequest;
@@ -39,13 +39,13 @@ public class RestDeprovisionWorkflowAction extends BaseRestHandler {
 
     private static final String DEPROVISION_WORKFLOW_ACTION = "deprovision_workflow";
     private static final Logger logger = LogManager.getLogger(RestDeprovisionWorkflowAction.class);
-    private final FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting;
+    private final FlowFrameworkSettings flowFrameworkFeatureEnabledSetting;
 
     /**
      * Instantiates a new RestDeprovisionWorkflowAction
      * @param flowFrameworkFeatureEnabledSetting Whether this API is enabled
      */
-    public RestDeprovisionWorkflowAction(FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting) {
+    public RestDeprovisionWorkflowAction(FlowFrameworkSettings flowFrameworkFeatureEnabledSetting) {
         this.flowFrameworkFeatureEnabledSetting = flowFrameworkFeatureEnabledSetting;
     }
 

src/main/java/org/opensearch/flowframework/rest/RestGetWorkflowAction.java

@@ -16,7 +16,7 @@
 import org.opensearch.core.rest.RestStatus;
 import org.opensearch.core.xcontent.ToXContent;
 import org.opensearch.core.xcontent.XContentBuilder;
-import org.opensearch.flowframework.common.FlowFrameworkFeatureEnabledSetting;
+import org.opensearch.flowframework.common.FlowFrameworkSettings;
 import org.opensearch.flowframework.exception.FlowFrameworkException;
 import org.opensearch.flowframework.transport.GetWorkflowAction;
 import org.opensearch.flowframework.transport.WorkflowRequest;
@@ -39,13 +39,13 @@ public class RestGetWorkflowAction extends BaseRestHandler {
 
     private static final String GET_WORKFLOW_ACTION = "get_workflow";
     private static final Logger logger = LogManager.getLogger(RestGetWorkflowAction.class);
-    private FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting;
+    private FlowFrameworkSettings flowFrameworkFeatureEnabledSetting;
 
     /**
      * Instantiates a new RestGetWorkflowAction
      * @param flowFrameworkFeatureEnabledSetting Whether this API is enabled
      */
-    public RestGetWorkflowAction(FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting) {
+    public RestGetWorkflowAction(FlowFrameworkSettings flowFrameworkFeatureEnabledSetting) {
         this.flowFrameworkFeatureEnabledSetting = flowFrameworkFeatureEnabledSetting;
     }
 

src/main/java/org/opensearch/flowframework/rest/RestGetWorkflowStateAction.java

@@ -16,7 +16,7 @@
 import org.opensearch.core.rest.RestStatus;
 import org.opensearch.core.xcontent.ToXContent;
 import org.opensearch.core.xcontent.XContentBuilder;
-import org.opensearch.flowframework.common.FlowFrameworkFeatureEnabledSetting;
+import org.opensearch.flowframework.common.FlowFrameworkSettings;
 import org.opensearch.flowframework.exception.FlowFrameworkException;
 import org.opensearch.flowframework.transport.GetWorkflowStateAction;
 import org.opensearch.flowframework.transport.GetWorkflowStateRequest;
@@ -39,13 +39,13 @@ public class RestGetWorkflowStateAction extends BaseRestHandler {
 
     private static final String GET_WORKFLOW_STATE_ACTION = "get_workflow_state";
     private static final Logger logger = LogManager.getLogger(RestGetWorkflowStateAction.class);
-    private FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting;
+    private FlowFrameworkSettings flowFrameworkFeatureEnabledSetting;
 
     /**
      * Instantiates a new RestGetWorkflowStateAction
      * @param flowFrameworkFeatureEnabledSetting Whether this API is enabled
      */
-    public RestGetWorkflowStateAction(FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting) {
+    public RestGetWorkflowStateAction(FlowFrameworkSettings flowFrameworkFeatureEnabledSetting) {
         this.flowFrameworkFeatureEnabledSetting = flowFrameworkFeatureEnabledSetting;
     }
 

src/main/java/org/opensearch/flowframework/rest/RestProvisionWorkflowAction.java

@@ -15,7 +15,7 @@
 import org.opensearch.core.rest.RestStatus;
 import org.opensearch.core.xcontent.ToXContent;
 import org.opensearch.core.xcontent.XContentBuilder;
-import org.opensearch.flowframework.common.FlowFrameworkFeatureEnabledSetting;
+import org.opensearch.flowframework.common.FlowFrameworkSettings;
 import org.opensearch.flowframework.exception.FlowFrameworkException;
 import org.opensearch.flowframework.transport.ProvisionWorkflowAction;
 import org.opensearch.flowframework.transport.WorkflowRequest;
@@ -40,14 +40,14 @@ public class RestProvisionWorkflowAction extends BaseRestHandler {
 
     private static final String PROVISION_WORKFLOW_ACTION = "provision_workflow_action";
 
-    private FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting;
+    private FlowFrameworkSettings flowFrameworkFeatureEnabledSetting;
 
     /**
      * Instantiates a new RestProvisionWorkflowAction
      *
      * @param flowFrameworkFeatureEnabledSetting Whether this API is enabled
      */
-    public RestProvisionWorkflowAction(FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting) {
+    public RestProvisionWorkflowAction(FlowFrameworkSettings flowFrameworkFeatureEnabledSetting) {
         this.flowFrameworkFeatureEnabledSetting = flowFrameworkFeatureEnabledSetting;
     }
 

src/main/java/org/opensearch/flowframework/rest/RestSearchWorkflowAction.java

@@ -8,7 +8,7 @@
  */
 package org.opensearch.flowframework.rest;
 
-import org.opensearch.flowframework.common.FlowFrameworkFeatureEnabledSetting;
+import org.opensearch.flowframework.common.FlowFrameworkSettings;
 import org.opensearch.flowframework.model.Template;
 import org.opensearch.flowframework.transport.SearchWorkflowAction;
 
@@ -30,7 +30,7 @@ public class RestSearchWorkflowAction extends AbstractSearchWorkflowAction<Templ
      *
      * @param flowFrameworkFeatureEnabledSetting Whether this API is enabled
      */
-    public RestSearchWorkflowAction(FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting) {
+    public RestSearchWorkflowAction(FlowFrameworkSettings flowFrameworkFeatureEnabledSetting) {
         super(
             List.of(SEARCH_WORKFLOW_PATH),
             GLOBAL_CONTEXT_INDEX,

src/main/java/org/opensearch/flowframework/rest/RestSearchWorkflowStateAction.java

@@ -8,7 +8,7 @@
  */
 package org.opensearch.flowframework.rest;
 
-import org.opensearch.flowframework.common.FlowFrameworkFeatureEnabledSetting;
+import org.opensearch.flowframework.common.FlowFrameworkSettings;
 import org.opensearch.flowframework.model.WorkflowState;
 import org.opensearch.flowframework.transport.SearchWorkflowStateAction;
 
@@ -30,7 +30,7 @@ public class RestSearchWorkflowStateAction extends AbstractSearchWorkflowAction<
      *
      * @param flowFrameworkFeatureEnabledSetting Whether this API is enabled
      */
-    public RestSearchWorkflowStateAction(FlowFrameworkFeatureEnabledSetting flowFrameworkFeatureEnabledSetting) {
+    public RestSearchWorkflowStateAction(FlowFrameworkSettings flowFrameworkFeatureEnabledSetting) {
         super(
             List.of(SEARCH_WORKFLOW_STATE_PATH),
             WORKFLOW_STATE_INDEX,