Add IndicesAwarePlugin

Signed-off-by: David Zane <[email protected]>

server/src/main/java/org/opensearch/node/Node.java

@@ -205,6 +205,7 @@
 import org.opensearch.plugins.IdentityAwarePlugin;
 import org.opensearch.plugins.IdentityPlugin;
 import org.opensearch.plugins.IndexStorePlugin;
+import org.opensearch.plugins.IndicesAwarePlugin;
 import org.opensearch.plugins.IngestPlugin;
 import org.opensearch.plugins.MapperPlugin;
 import org.opensearch.plugins.MetadataUpgrader;
@@ -1023,6 +1024,31 @@ protected Node(
             // Add the telemetryAwarePlugin components to the existing pluginComponents collection.
             pluginComponents.addAll(telemetryAwarePluginComponents);
 
+            Collection<Object> indicesAwarePluginComponents = pluginsService.filterPlugins(IndicesAwarePlugin.class)
+                .stream()
+                .flatMap(
+                    p -> p.createComponents(
+                        client,
+                        clusterService,
+                        threadPool,
+                        resourceWatcherService,
+                        scriptService,
+                        xContentRegistry,
+                        environment,
+                        nodeEnvironment,
+                        namedWriteableRegistry,
+                        clusterModule.getIndexNameExpressionResolver(),
+                        repositoriesServiceReference::get,
+                        tracer,
+                        metricsRegistry,
+                        indicesService
+                    ).stream()
+                )
+                .collect(Collectors.toList());
+
+            // Add the indicesAwarePluginComponents components to the existing pluginComponents collection.
+            pluginComponents.addAll(indicesAwarePluginComponents);
+
             List<IdentityAwarePlugin> identityAwarePlugins = pluginsService.filterPlugins(IdentityAwarePlugin.class);
             identityService.initializeIdentityAwarePlugins(identityAwarePlugins);
 

server/src/main/java/org/opensearch/plugins/IndicesAwarePlugin.java

@@ -0,0 +1,83 @@
+/*
+ * 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.plugins;
+
+import org.opensearch.client.Client;
+import org.opensearch.cluster.metadata.IndexNameExpressionResolver;
+import org.opensearch.cluster.service.ClusterService;
+import org.opensearch.common.annotation.ExperimentalApi;
+import org.opensearch.common.lifecycle.LifecycleComponent;
+import org.opensearch.core.common.io.stream.NamedWriteable;
+import org.opensearch.core.common.io.stream.NamedWriteableRegistry;
+import org.opensearch.core.xcontent.NamedXContentRegistry;
+import org.opensearch.env.Environment;
+import org.opensearch.env.NodeEnvironment;
+import org.opensearch.indices.IndicesService;
+import org.opensearch.repositories.RepositoriesService;
+import org.opensearch.script.ScriptService;
+import org.opensearch.telemetry.metrics.MetricsRegistry;
+import org.opensearch.telemetry.tracing.Tracer;
+import org.opensearch.threadpool.ThreadPool;
+import org.opensearch.watcher.ResourceWatcherService;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.function.Supplier;
+
+/**
+ * Plugin that provides the telemetry registries to build component with telemetry and also provide a way to
+ * pass telemetry registries to the implementing plugins for adding instrumentation in the code.
+ *
+ * @opensearch.experimental
+ */
+@ExperimentalApi
+public interface IndicesAwarePlugin {
+
+    /**
+     * Returns components added by this plugin.
+     * <p>
+     * Any components returned that implement {@link LifecycleComponent} will have their lifecycle managed.
+     * Note: To aid in the migration away from guice, all objects returned as components will be bound in guice
+     * to themselves.
+     *
+     * @param client A client to make requests to the system
+     * @param clusterService A service to allow watching and updating cluster state
+     * @param threadPool A service to allow retrieving an executor to run an async action
+     * @param resourceWatcherService A service to watch for changes to node local files
+     * @param scriptService A service to allow running scripts on the local node
+     * @param xContentRegistry the registry for extensible xContent parsing
+     * @param environment the environment for path and setting configurations
+     * @param nodeEnvironment the node environment used coordinate access to the data paths
+     * @param namedWriteableRegistry the registry for {@link NamedWriteable} object parsing
+     * @param indexNameExpressionResolver A service that resolves expression to index and alias names
+     * @param repositoriesServiceSupplier A supplier for the service that manages snapshot repositories; will return null when this method
+     *                                   is called, but will return the repositories service once the node is initialized.
+     * @param tracer the tracer to add tracing instrumentation.
+     * @param metricsRegistry the registry for metrics instrumentation.
+     * @param indicesService A service to track indices
+     */
+    default Collection<Object> createComponents(
+        Client client,
+        ClusterService clusterService,
+        ThreadPool threadPool,
+        ResourceWatcherService resourceWatcherService,
+        ScriptService scriptService,
+        NamedXContentRegistry xContentRegistry,
+        Environment environment,
+        NodeEnvironment nodeEnvironment,
+        NamedWriteableRegistry namedWriteableRegistry,
+        IndexNameExpressionResolver indexNameExpressionResolver,
+        Supplier<RepositoriesService> repositoriesServiceSupplier,
+        Tracer tracer,
+        MetricsRegistry metricsRegistry,
+        IndicesService indicesService
+    ) {
+        return Collections.emptyList();
+    }
+}