Register system index descriptors through SystemIndexPlugin.getSystem…

…IndexDescriptors (#2772)

* Register system index descriptors through SystemIndexPlugin.getSystemIndexDescriptors

Signed-off-by: Craig Perkins <cwperx@amazon.com>

* Add Spark Buffer index pattern

Signed-off-by: Craig Perkins <cwperx@amazon.com>

* Upgrade to checkout v4

Signed-off-by: Craig Perkins <cwperx@amazon.com>

* Fix CI issues

Signed-off-by: Craig Perkins <cwperx@amazon.com>

* Move env

Signed-off-by: Craig Perkins <cwperx@amazon.com>

* Revert "Upgrade to checkout v4"

This reverts commit b35573b.

---------

Signed-off-by: Craig Perkins <cwperx@amazon.com>
Signed-off-by: Derek Ho <dxho@amazon.com>
Co-authored-by: Derek Ho <dxho@amazon.com>

plugin/src/main/java/org/opensearch/sql/plugin/SQLPlugin.java

@@ -7,10 +7,12 @@
 
 import static java.util.Collections.singletonList;
 import static org.opensearch.sql.datasource.model.DataSourceMetadata.defaultOpenSearchDataSourceMetadata;
+import static org.opensearch.sql.spark.data.constants.SparkConstants.SPARK_REQUEST_BUFFER_INDEX_NAME;
 
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableSet;
 import java.time.Clock;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
@@ -39,9 +41,11 @@
 import org.opensearch.core.xcontent.NamedXContentRegistry;
 import org.opensearch.env.Environment;
 import org.opensearch.env.NodeEnvironment;
+import org.opensearch.indices.SystemIndexDescriptor;
 import org.opensearch.plugins.ActionPlugin;
 import org.opensearch.plugins.Plugin;
 import org.opensearch.plugins.ScriptPlugin;
+import org.opensearch.plugins.SystemIndexPlugin;
 import org.opensearch.repositories.RepositoriesService;
 import org.opensearch.rest.RestController;
 import org.opensearch.rest.RestHandler;
@@ -58,7 +62,11 @@
 import org.opensearch.sql.datasources.service.DataSourceMetadataStorage;
 import org.opensearch.sql.datasources.service.DataSourceServiceImpl;
 import org.opensearch.sql.datasources.storage.OpenSearchDataSourceMetadataStorage;
-import org.opensearch.sql.datasources.transport.*;
+import org.opensearch.sql.datasources.transport.TransportCreateDataSourceAction;
+import org.opensearch.sql.datasources.transport.TransportDeleteDataSourceAction;
+import org.opensearch.sql.datasources.transport.TransportGetDataSourceAction;
+import org.opensearch.sql.datasources.transport.TransportPatchDataSourceAction;
+import org.opensearch.sql.datasources.transport.TransportUpdateDataSourceAction;
 import org.opensearch.sql.legacy.esdomain.LocalClusterState;
 import org.opensearch.sql.legacy.executor.AsyncRestExecutor;
 import org.opensearch.sql.legacy.metrics.Metrics;
@@ -97,7 +105,7 @@
 import org.opensearch.threadpool.ThreadPool;
 import org.opensearch.watcher.ResourceWatcherService;
 
-public class SQLPlugin extends Plugin implements ActionPlugin, ScriptPlugin {
+public class SQLPlugin extends Plugin implements ActionPlugin, ScriptPlugin, SystemIndexPlugin {
 
   private static final Logger LOGGER = LogManager.getLogger(SQLPlugin.class);
 
@@ -292,4 +300,16 @@ private DataSourceServiceImpl createDataSourceService() {
         dataSourceMetadataStorage,
         dataSourceUserAuthorizationHelper);
   }
+
+  @Override
+  public Collection<SystemIndexDescriptor> getSystemIndexDescriptors(Settings settings) {
+    List<SystemIndexDescriptor> systemIndexDescriptors = new ArrayList<>();
+    systemIndexDescriptors.add(
+        new SystemIndexDescriptor(
+            OpenSearchDataSourceMetadataStorage.DATASOURCE_INDEX_NAME, "SQL DataSources index"));
+    systemIndexDescriptors.add(
+        new SystemIndexDescriptor(
+            SPARK_REQUEST_BUFFER_INDEX_NAME + "*", "SQL Spark Request Buffer index pattern"));
+    return systemIndexDescriptors;
+  }
 }