[Feature] Flint query scheduler part1 - integrate job scheduler plugin

.gitignore

@@ -49,4 +49,5 @@ gen
 .worktrees
 http-client.env.json
 /doctest/sql-cli/
+/doctest/opensearch-job-scheduler/
 .factorypath

async-query-core/src/main/antlr/SqlBaseParser.g4

@@ -66,8 +66,8 @@ compoundStatement
     ;
 
 setStatementWithOptionalVarKeyword
-    : SET (VARIABLE | VAR)? assignmentList                      #setVariableWithOptionalKeyword
-    | SET (VARIABLE | VAR)? LEFT_PAREN multipartIdentifierList RIGHT_PAREN EQ
+    : SET variable? assignmentList                              #setVariableWithOptionalKeyword
+    | SET variable? LEFT_PAREN multipartIdentifierList RIGHT_PAREN EQ
         LEFT_PAREN query RIGHT_PAREN                            #setVariableWithOptionalKeyword
     ;
 
@@ -215,9 +215,9 @@ statement
         routineCharacteristics
         RETURN (query | expression)                                    #createUserDefinedFunction
     | DROP TEMPORARY? FUNCTION (IF EXISTS)? identifierReference        #dropFunction
-    | DECLARE (OR REPLACE)? VARIABLE?
+    | DECLARE (OR REPLACE)? variable?
         identifierReference dataType? variableDefaultExpression?       #createVariable
-    | DROP TEMPORARY VARIABLE (IF EXISTS)? identifierReference         #dropVariable
+    | DROP TEMPORARY variable (IF EXISTS)? identifierReference         #dropVariable
     | EXPLAIN (LOGICAL | FORMATTED | EXTENDED | CODEGEN | COST)?
         (statement|setResetStatement)                                  #explain
     | SHOW TABLES ((FROM | IN) identifierReference)?
@@ -272,8 +272,8 @@ setResetStatement
     | SET TIME ZONE interval                                           #setTimeZone
     | SET TIME ZONE timezone                                           #setTimeZone
     | SET TIME ZONE .*?                                                #setTimeZone
-    | SET (VARIABLE | VAR) assignmentList                              #setVariable
-    | SET (VARIABLE | VAR) LEFT_PAREN multipartIdentifierList RIGHT_PAREN EQ
+    | SET variable assignmentList                                      #setVariable
+    | SET variable LEFT_PAREN multipartIdentifierList RIGHT_PAREN EQ
         LEFT_PAREN query RIGHT_PAREN                                   #setVariable
     | SET configKey EQ configValue                                     #setQuotedConfiguration
     | SET configKey (EQ .*?)?                                          #setConfiguration
@@ -438,6 +438,11 @@ namespaces
     | SCHEMAS
     ;
 
+variable
+    : VARIABLE
+    | VAR
+    ;
+
 describeFuncName
     : identifierReference
     | stringLit

async-query/build.gradle

@@ -16,6 +16,8 @@ repositories {
 
 
 dependencies {
+    implementation "org.opensearch:opensearch-job-scheduler-spi:${opensearch_build}"
+
     api project(':core')
     api project(':async-query-core')
     implementation project(':protocol')
@@ -97,6 +99,7 @@ jacocoTestCoverageVerification {
                     // ignore because XContext IOException
                     'org.opensearch.sql.spark.execution.statestore.StateStore',
                     'org.opensearch.sql.spark.rest.*',
+                    'org.opensearch.sql.spark.scheduler.OpenSearchRefreshIndexJobRequestParser',
                     'org.opensearch.sql.spark.transport.model.*'
             ]
             limit {

async-query/src/main/java/org/opensearch/sql/spark/scheduler/OpenSearchAsyncQueryScheduler.java

@@ -0,0 +1,197 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.sql.spark.scheduler;
+
+import static org.opensearch.core.xcontent.ToXContent.EMPTY_PARAMS;
+
+import com.google.common.annotations.VisibleForTesting;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import java.time.Instant;
+import org.apache.commons.io.IOUtils;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.opensearch.action.DocWriteRequest;
+import org.opensearch.action.DocWriteResponse;
+import org.opensearch.action.admin.indices.create.CreateIndexRequest;
+import org.opensearch.action.admin.indices.create.CreateIndexResponse;
+import org.opensearch.action.delete.DeleteRequest;
+import org.opensearch.action.delete.DeleteResponse;
+import org.opensearch.action.index.IndexRequest;
+import org.opensearch.action.index.IndexResponse;
+import org.opensearch.action.support.WriteRequest;
+import org.opensearch.action.update.UpdateRequest;
+import org.opensearch.action.update.UpdateResponse;
+import org.opensearch.client.Client;
+import org.opensearch.cluster.service.ClusterService;
+import org.opensearch.common.action.ActionFuture;
+import org.opensearch.common.xcontent.XContentType;
+import org.opensearch.common.xcontent.json.JsonXContent;
+import org.opensearch.index.engine.DocumentMissingException;
+import org.opensearch.index.engine.VersionConflictEngineException;
+import org.opensearch.jobscheduler.spi.ScheduledJobRunner;
+import org.opensearch.sql.spark.scheduler.job.OpenSearchRefreshIndexJob;
+import org.opensearch.sql.spark.scheduler.model.OpenSearchRefreshIndexJobRequest;
+import org.opensearch.threadpool.ThreadPool;
+
+/** Scheduler class for managing asynchronous query jobs. */
+public class OpenSearchAsyncQueryScheduler {
+  public static final String SCHEDULER_INDEX_NAME = ".async-query-scheduler";
+  public static final String SCHEDULER_PLUGIN_JOB_TYPE = "async-query-scheduler";
+  private static final String SCHEDULER_INDEX_MAPPING_FILE_NAME =
+      "async-query-scheduler-index-mapping.yml";
+  private static final String SCHEDULER_INDEX_SETTINGS_FILE_NAME =
+      "async-query-scheduler-index-settings.yml";
+  private static final Logger LOG = LogManager.getLogger();
+
+  private Client client;
+  private ClusterService clusterService;
+
+  /** Loads job resources, setting up required services and job runner instance. */
+  public void loadJobResource(Client client, ClusterService clusterService, ThreadPool threadPool) {
+    this.client = client;
+    this.clusterService = clusterService;
+    OpenSearchRefreshIndexJob openSearchRefreshIndexJob =
+        OpenSearchRefreshIndexJob.getJobRunnerInstance();
+    openSearchRefreshIndexJob.setClusterService(clusterService);
+    openSearchRefreshIndexJob.setThreadPool(threadPool);
+    openSearchRefreshIndexJob.setClient(client);
+  }
+
+  /** Schedules a new job by indexing it into the job index. */
+  public void scheduleJob(OpenSearchRefreshIndexJobRequest request) {
+    if (!this.clusterService.state().routingTable().hasIndex(SCHEDULER_INDEX_NAME)) {
+      createAsyncQuerySchedulerIndex();
+    }
+    IndexRequest indexRequest = new IndexRequest(SCHEDULER_INDEX_NAME);
+    indexRequest.id(request.getName());
+    indexRequest.opType(DocWriteRequest.OpType.CREATE);
+    indexRequest.setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE);
+    IndexResponse indexResponse;
+    try {
+      indexRequest.source(request.toXContent(JsonXContent.contentBuilder(), EMPTY_PARAMS));
+      ActionFuture<IndexResponse> indexResponseActionFuture = client.index(indexRequest);
+      indexResponse = indexResponseActionFuture.actionGet();
+    } catch (VersionConflictEngineException exception) {
+      throw new IllegalArgumentException("A job already exists with name: " + request.getName());
+    } catch (Throwable e) {
+      LOG.error("Failed to schedule job : {}", request.getName(), e);
+      throw new RuntimeException(e);
+    }
+
+    if (indexResponse.getResult().equals(DocWriteResponse.Result.CREATED)) {
+      LOG.debug("Job : {}  successfully created", request.getName());
+    } else {
+      throw new RuntimeException(
+          "Schedule job failed with result : " + indexResponse.getResult().getLowercase());
+    }
+  }
+
+  /** Unschedules a job by marking it as disabled and updating its last update time. */
+  public void unscheduleJob(String jobId) throws IOException {
+    assertIndexExists();
+    OpenSearchRefreshIndexJobRequest request =
+        OpenSearchRefreshIndexJobRequest.builder()
+            .jobName(jobId)
+            .enabled(false)
+            .lastUpdateTime(Instant.now())
+            .build();
+    updateJob(request);
+  }
+
+  /** Updates an existing job with new parameters. */
+  public void updateJob(OpenSearchRefreshIndexJobRequest request) throws IOException {
+    assertIndexExists();
+    UpdateRequest updateRequest = new UpdateRequest(SCHEDULER_INDEX_NAME, request.getName());
+    updateRequest.setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE);
+    updateRequest.doc(request.toXContent(JsonXContent.contentBuilder(), EMPTY_PARAMS));
+    UpdateResponse updateResponse;
+    try {
+      ActionFuture<UpdateResponse> updateResponseActionFuture = client.update(updateRequest);
+      updateResponse = updateResponseActionFuture.actionGet();
+    } catch (DocumentMissingException exception) {
+      throw new IllegalArgumentException("Job: " + request.getName() + " doesn't exist");
+    } catch (Throwable e) {
+      LOG.error("Failed to update job : {}", request.getName(), e);
+      throw new RuntimeException(e);
+    }
+
+    if (updateResponse.getResult().equals(DocWriteResponse.Result.UPDATED)
+        || updateResponse.getResult().equals(DocWriteResponse.Result.NOOP)) {
+      LOG.debug("Job : {} successfully updated", request.getName());
+    } else {
+      throw new RuntimeException(
+          "Update job failed with result : " + updateResponse.getResult().getLowercase());
+    }
+  }
+
+  /** Removes a job by deleting its document from the index. */
+  public void removeJob(String jobId) {
+    assertIndexExists();
+    DeleteRequest deleteRequest = new DeleteRequest(SCHEDULER_INDEX_NAME, jobId);
+    deleteRequest.setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE);
+    ActionFuture<DeleteResponse> deleteResponseActionFuture = client.delete(deleteRequest);
+    DeleteResponse deleteResponse = deleteResponseActionFuture.actionGet();
+
+    if (deleteResponse.getResult().equals(DocWriteResponse.Result.DELETED)) {
+      LOG.debug("Job : {} successfully deleted", jobId);
+    } else if (deleteResponse.getResult().equals(DocWriteResponse.Result.NOT_FOUND)) {
+      throw new IllegalArgumentException("Job : " + jobId + " doesn't exist");
+    } else {
+      throw new RuntimeException(
+          "Remove job failed with result : " + deleteResponse.getResult().getLowercase());
+    }
+  }
+
+  /** Creates the async query scheduler index with specified mappings and settings. */
+  @VisibleForTesting
+  void createAsyncQuerySchedulerIndex() {
+    try {
+      InputStream mappingFileStream =
+          OpenSearchAsyncQueryScheduler.class
+              .getClassLoader()
+              .getResourceAsStream(SCHEDULER_INDEX_MAPPING_FILE_NAME);
+      InputStream settingsFileStream =
+          OpenSearchAsyncQueryScheduler.class
+              .getClassLoader()
+              .getResourceAsStream(SCHEDULER_INDEX_SETTINGS_FILE_NAME);
+      CreateIndexRequest createIndexRequest = new CreateIndexRequest(SCHEDULER_INDEX_NAME);
+      createIndexRequest.mapping(
+          IOUtils.toString(mappingFileStream, StandardCharsets.UTF_8), XContentType.YAML);
+      createIndexRequest.settings(
+          IOUtils.toString(settingsFileStream, StandardCharsets.UTF_8), XContentType.YAML);
+      ActionFuture<CreateIndexResponse> createIndexResponseActionFuture =
+          client.admin().indices().create(createIndexRequest);
+      CreateIndexResponse createIndexResponse = createIndexResponseActionFuture.actionGet();
+
+      if (createIndexResponse.isAcknowledged()) {
+        LOG.debug("Index: {} creation Acknowledged", SCHEDULER_INDEX_NAME);
+      } else {
+        throw new RuntimeException("Index creation is not acknowledged.");
+      }
+    } catch (Throwable e) {
+      LOG.error("Error creating index: {}", SCHEDULER_INDEX_NAME, e);
+      throw new RuntimeException(
+          "Internal server error while creating "
+              + SCHEDULER_INDEX_NAME
+              + " index: "
+              + e.getMessage(),
+          e);
+    }
+  }
+
+  private void assertIndexExists() {
+    if (!this.clusterService.state().routingTable().hasIndex(SCHEDULER_INDEX_NAME)) {
+      throw new IllegalStateException("Job index does not exist.");
+    }
+  }
+
+  /** Returns the job runner instance for the scheduler. */
+  public static ScheduledJobRunner getJobRunner() {
+    return OpenSearchRefreshIndexJob.getJobRunnerInstance();
+  }
+}

async-query/src/main/java/org/opensearch/sql/spark/scheduler/OpenSearchRefreshIndexJobRequestParser.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.sql.spark.scheduler;
+
+import java.io.IOException;
+import java.time.Instant;
+import org.opensearch.core.xcontent.XContentParser;
+import org.opensearch.core.xcontent.XContentParserUtils;
+import org.opensearch.jobscheduler.spi.ScheduledJobParser;
+import org.opensearch.jobscheduler.spi.schedule.ScheduleParser;
+import org.opensearch.sql.spark.scheduler.model.OpenSearchRefreshIndexJobRequest;
+
+public class OpenSearchRefreshIndexJobRequestParser {
+
+  private static Instant parseInstantValue(XContentParser parser) throws IOException {
+    if (XContentParser.Token.VALUE_NULL.equals(parser.currentToken())) {
+      return null;
+    }
+    if (parser.currentToken().isValue()) {
+      return Instant.ofEpochMilli(parser.longValue());
+    }
+    XContentParserUtils.throwUnknownToken(parser.currentToken(), parser.getTokenLocation());
+    return null;
+  }
+
+  public static ScheduledJobParser getJobParser() {
+    return (parser, id, jobDocVersion) -> {
+      OpenSearchRefreshIndexJobRequest.OpenSearchRefreshIndexJobRequestBuilder builder =
+          OpenSearchRefreshIndexJobRequest.builder();
+      XContentParserUtils.ensureExpectedToken(
+          XContentParser.Token.START_OBJECT, parser.nextToken(), parser);
+
+      while (!parser.nextToken().equals(XContentParser.Token.END_OBJECT)) {
+        String fieldName = parser.currentName();
+        parser.nextToken();
+        switch (fieldName) {
+          case OpenSearchRefreshIndexJobRequest.JOB_NAME_FIELD:
+            builder.jobName(parser.text());
+            break;
+          case OpenSearchRefreshIndexJobRequest.JOB_TYPE_FIELD:
+            builder.jobType(parser.text());
+            break;
+          case OpenSearchRefreshIndexJobRequest.ENABLED_FIELD:
+            builder.enabled(parser.booleanValue());
+            break;
+          case OpenSearchRefreshIndexJobRequest.ENABLED_TIME_FIELD:
+            builder.enabledTime(parseInstantValue(parser));
+            break;
+          case OpenSearchRefreshIndexJobRequest.LAST_UPDATE_TIME_FIELD:
+            builder.lastUpdateTime(parseInstantValue(parser));
+            break;
+          case OpenSearchRefreshIndexJobRequest.SCHEDULE_FIELD:
+            builder.schedule(ScheduleParser.parse(parser));
+            break;
+          case OpenSearchRefreshIndexJobRequest.LOCK_DURATION_SECONDS:
+            builder.lockDurationSeconds(parser.longValue());
+            break;
+          case OpenSearchRefreshIndexJobRequest.JITTER:
+            builder.jitter(parser.doubleValue());
+            break;
+          default:
+            XContentParserUtils.throwUnknownToken(parser.currentToken(), parser.getTokenLocation());
+        }
+      }
+      return builder.build();
+    };
+  }
+}