add InteractiveSession and SessionManager

spark/build.gradle

@@ -52,22 +52,47 @@ dependencies {
     api group: 'com.amazonaws', name: 'aws-java-sdk-emrserverless', version: '1.12.545'
     implementation group: 'commons-io', name: 'commons-io', version: '2.8.0'
 
-    testImplementation('org.junit.jupiter:junit-jupiter:5.6.2')
+    testImplementation(platform("org.junit:junit-bom:5.6.2"))
+
+    testImplementation('org.junit.jupiter:junit-jupiter')
     testImplementation group: 'org.mockito', name: 'mockito-core', version: '5.2.0'
     testImplementation group: 'org.mockito', name: 'mockito-junit-jupiter', version: '5.2.0'
-    testImplementation 'junit:junit:4.13.1'
-    testImplementation "org.opensearch.test:framework:${opensearch_version}"
+
+    testCompileOnly('junit:junit:4.13.1') {
+        exclude group: 'org.hamcrest', module: 'hamcrest-core'
+    }
+    testRuntimeOnly("org.junit.vintage:junit-vintage-engine") {
+        exclude group: 'org.hamcrest', module: 'hamcrest-core'
+    }
+    testRuntimeOnly("org.junit.platform:junit-platform-launcher") {
+        because 'allows tests to run from IDEs that bundle older version of launcher'
+    }
+    testImplementation("org.opensearch.test:framework:${opensearch_version}")
 }
 
 test {
-    useJUnitPlatform()
+    useJUnitPlatform {
+        includeEngines("junit-jupiter")
+    }
+    testLogging {
+        events "failed"
+        exceptionFormat "full"
+    }
+}
+task junit4(type: Test) {
+    useJUnitPlatform {
+        includeEngines("junit-vintage")
+    }
+    systemProperty 'tests.security.manager', 'false'
     testLogging {
         events "failed"
         exceptionFormat "full"
     }
 }
 
 jacocoTestReport {
+    dependsOn test, junit4
+    executionData test, junit4
     reports {
         html.enabled true
         xml.enabled true
@@ -78,9 +103,10 @@ jacocoTestReport {
         }))
     }
 }
-test.finalizedBy(project.tasks.jacocoTestReport)
 
 jacocoTestCoverageVerification {
+    dependsOn test, junit4
+    executionData test, junit4
     violationRules {
         rule {
             element = 'CLASS'
@@ -92,6 +118,9 @@ jacocoTestCoverageVerification {
                     'org.opensearch.sql.spark.asyncquery.exceptions.*',
                     'org.opensearch.sql.spark.dispatcher.model.*',
                     'org.opensearch.sql.spark.flint.FlintIndexType',
+                    // ignore because XContext IOException
+                    'org.opensearch.sql.spark.execution.statestore.SessionStateStore',
+                    'org.opensearch.sql.spark.execution.session.SessionModel'
             ]
             limit {
                 counter = 'LINE'

spark/src/main/java/org/opensearch/sql/spark/execution/session/CreateSessionRequest.java

@@ -0,0 +1,15 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.sql.spark.execution.session;
+
+import lombok.Data;
+import org.opensearch.sql.spark.client.StartJobRequest;
+
+@Data
+public class CreateSessionRequest {
+  private final StartJobRequest startJobRequest;
+  private final String datasourceName;
+}

spark/src/main/java/org/opensearch/sql/spark/execution/session/InteractiveSession.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.sql.spark.execution.session;
+
+import static org.opensearch.sql.spark.execution.session.SessionModel.initInteractiveSession;
+
+import java.util.Optional;
+import lombok.Builder;
+import lombok.Getter;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.opensearch.index.engine.VersionConflictEngineException;
+import org.opensearch.sql.spark.client.EMRServerlessClient;
+import org.opensearch.sql.spark.execution.statestore.SessionStateStore;
+
+/**
+ * Interactive session.
+ *
+ * <p>ENTRY_STATE: not_started
+ */
+@Getter
+@Builder
+public class InteractiveSession implements Session {
+  private static final Logger LOG = LogManager.getLogger();
+
+  private final SessionId sessionId;
+  private final SessionStateStore sessionStateStore;
+  private final EMRServerlessClient serverlessClient;
+
+  private SessionModel sessionModel;
+
+  @Override
+  public void open(CreateSessionRequest createSessionRequest) {
+    try {
+      String jobID = serverlessClient.startJobRun(createSessionRequest.getStartJobRequest());
+      String applicationId = createSessionRequest.getStartJobRequest().getApplicationId();
+
+      sessionModel =
+          initInteractiveSession(
+              applicationId, jobID, sessionId, createSessionRequest.getDatasourceName());
+      sessionStateStore.create(sessionModel);
+    } catch (VersionConflictEngineException e) {
+      String errorMsg = "session already exist. " + sessionId;
+      LOG.error(errorMsg);
+      throw new IllegalStateException(errorMsg);
+    }
+  }
+
+  @Override
+  public void close() {
+    Optional<SessionModel> model = sessionStateStore.get(sessionModel.getSessionId());
+    if (model.isEmpty()) {
+      throw new IllegalStateException("session not exist. " + sessionModel.getSessionId());
+    } else {
+      serverlessClient.cancelJobRun(sessionModel.getApplicationId(), sessionModel.getJobId());
+    }
+  }
+}

spark/src/main/java/org/opensearch/sql/spark/execution/session/Session.java

@@ -0,0 +1,19 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.sql.spark.execution.session;
+
+/** Session define the statement execution context. Each session is binding to one Spark Job. */
+public interface Session {
+  /** open session. */
+  void open(CreateSessionRequest createSessionRequest);
+
+  /** close session. */
+  void close();
+
+  SessionModel getSessionModel();
+
+  SessionId getSessionId();
+}

spark/src/main/java/org/opensearch/sql/spark/execution/session/SessionId.java

@@ -0,0 +1,23 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.sql.spark.execution.session;
+
+import lombok.Data;
+import org.apache.commons.lang3.RandomStringUtils;
+
+@Data
+public class SessionId {
+  private final String sessionId;
+
+  public static SessionId newSessionId() {
+    return new SessionId(RandomStringUtils.random(10, true, true));
+  }
+
+  @Override
+  public String toString() {
+    return "sessionId=" + sessionId;
+  }
+}

spark/src/main/java/org/opensearch/sql/spark/execution/session/SessionManager.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.sql.spark.execution.session;
+
+import static org.opensearch.sql.spark.execution.session.SessionId.newSessionId;
+
+import java.util.Optional;
+import lombok.RequiredArgsConstructor;
+import org.opensearch.sql.spark.client.EMRServerlessClient;
+import org.opensearch.sql.spark.execution.statestore.SessionStateStore;
+
+/**
+ * Singleton Class
+ *
+ * <p>todo. add Session cache and Session sweeper.
+ */
+@RequiredArgsConstructor
+public class SessionManager {
+  private final SessionStateStore stateStore;
+  private final EMRServerlessClient emrServerlessClient;
+
+  public Session createSession(CreateSessionRequest request) {
+    InteractiveSession session =
+        InteractiveSession.builder()
+            .sessionId(newSessionId())
+            .sessionStateStore(stateStore)
+            .serverlessClient(emrServerlessClient)
+            .build();
+    session.open(request);
+    return session;
+  }
+
+  public Optional<Session> getSession(SessionId sid) {
+    Optional<SessionModel> model = stateStore.get(sid);
+    if (model.isPresent()) {
+      InteractiveSession session =
+          InteractiveSession.builder()
+              .sessionId(sid)
+              .sessionStateStore(stateStore)
+              .serverlessClient(emrServerlessClient)
+              .sessionModel(model.get())
+              .build();
+      return Optional.ofNullable(session);
+    }
+    return Optional.empty();
+  }
+}

spark/src/main/java/org/opensearch/sql/spark/execution/session/SessionModel.java

@@ -0,0 +1,143 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.sql.spark.execution.session;
+
+import static org.opensearch.sql.spark.execution.session.SessionState.NOT_STARTED;
+import static org.opensearch.sql.spark.execution.session.SessionType.INTERACTIVE;
+
+import java.io.IOException;
+import lombok.Builder;
+import lombok.Data;
+import lombok.SneakyThrows;
+import org.opensearch.core.xcontent.ToXContentObject;
+import org.opensearch.core.xcontent.XContentBuilder;
+import org.opensearch.core.xcontent.XContentParser;
+import org.opensearch.core.xcontent.XContentParserUtils;
+import org.opensearch.index.seqno.SequenceNumbers;
+
+/** Session data in flint.ql.sessions index. */
+@Data
+@Builder
+public class SessionModel implements ToXContentObject {
+  public static final String VERSION = "version";
+  public static final String TYPE = "type";
+  public static final String SESSION_TYPE = "sessionType";
+  public static final String SESSION_ID = "sessionId";
+  public static final String SESSION_STATE = "state";
+  public static final String DATASOURCE_NAME = "dataSourceName";
+  public static final String LAST_UPDATE_TIME = "lastUpdateTime";
+  public static final String APPLICATION_ID = "applicationId";
+  public static final String JOB_ID = "jobId";
+  public static final String ERROR = "error";
+  public static final String UNKNOWN = "unknown";
+  public static final String SESSION_DOC_TYPE = "session";
+
+  private final String version;
+  private final SessionType sessionType;
+  private final SessionId sessionId;
+  private final SessionState sessionState;
+  private final String applicationId;
+  private final String jobId;
+  private final String datasourceName;
+  private final String error;
+  private final long lastUpdateTime;
+
+  private final long seqNo;
+  private final long primaryTerm;
+
+  @Override
+  public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
+    builder
+        .startObject()
+        .field(VERSION, version)
+        .field(TYPE, SESSION_DOC_TYPE)
+        .field(SESSION_TYPE, sessionType.getSessionType())
+        .field(SESSION_ID, sessionId.getSessionId())
+        .field(SESSION_STATE, sessionState.getSessionState())
+        .field(DATASOURCE_NAME, datasourceName)
+        .field(APPLICATION_ID, applicationId)
+        .field(JOB_ID, jobId)
+        .field(LAST_UPDATE_TIME, lastUpdateTime)
+        .field(ERROR, error)
+        .endObject();
+    return builder;
+  }
+
+  public static SessionModel of(SessionModel copy, long seqNo, long primaryTerm) {
+    return builder()
+        .version(copy.version)
+        .sessionType(copy.sessionType)
+        .sessionId(new SessionId(copy.sessionId.getSessionId()))
+        .sessionState(copy.sessionState)
+        .datasourceName(copy.datasourceName)
+        .seqNo(seqNo)
+        .primaryTerm(primaryTerm)
+        .build();
+  }
+
+  @SneakyThrows
+  public static SessionModel fromXContent(XContentParser parser, long seqNo, long primaryTerm) {
+    SessionModelBuilder builder = new SessionModelBuilder();
+    XContentParserUtils.ensureExpectedToken(
+        XContentParser.Token.START_OBJECT, parser.currentToken(), parser);
+    while (!XContentParser.Token.END_OBJECT.equals(parser.nextToken())) {
+      String fieldName = parser.currentName();
+      parser.nextToken();
+      switch (fieldName) {
+        case VERSION:
+          builder.version(parser.text());
+          break;
+        case SESSION_TYPE:
+          builder.sessionType(SessionType.fromString(parser.text()));
+          break;
+        case SESSION_ID:
+          builder.sessionId(new SessionId(parser.text()));
+          break;
+        case SESSION_STATE:
+          builder.sessionState(SessionState.fromString(parser.text()));
+          break;
+        case DATASOURCE_NAME:
+          builder.datasourceName(parser.text());
+          break;
+        case ERROR:
+          builder.error(parser.text());
+          break;
+        case APPLICATION_ID:
+          builder.applicationId(parser.text());
+          break;
+        case JOB_ID:
+          builder.jobId(parser.text());
+          break;
+        case LAST_UPDATE_TIME:
+          builder.lastUpdateTime(parser.longValue());
+          break;
+        case TYPE:
+          // do nothing.
+          break;
+      }
+    }
+    builder.seqNo(seqNo);
+    builder.primaryTerm(primaryTerm);
+    return builder.build();
+  }
+
+  public static SessionModel initInteractiveSession(
+      String applicationId, String jobId, SessionId sid, String datasourceName) {
+    return builder()
+        .version("1.0")
+        .sessionType(INTERACTIVE)
+        .sessionId(sid)
+        .sessionState(NOT_STARTED)
+        .datasourceName(datasourceName)
+        .applicationId(applicationId)
+        .jobId(jobId)
+        .error(UNKNOWN)
+        .lastUpdateTime(System.currentTimeMillis())
+        .seqNo(SequenceNumbers.UNASSIGNED_SEQ_NO)
+        .primaryTerm(SequenceNumbers.UNASSIGNED_PRIMARY_TERM)
+        .build();
+  }
+}