arjun4084346 commented on code in PR #3999: URL: https://github.com/apache/gobblin/pull/3999#discussion_r1680067095
########## gobblin-service/src/main/java/org/apache/gobblin/service/modules/orchestration/MysqlDagStateStoreV2.java: ########## @@ -0,0 +1,252 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.gobblin.service.modules.orchestration; + +import java.io.IOException; +import java.lang.reflect.Type; +import java.net.URI; +import java.sql.Connection; +import java.sql.PreparedStatement; +import java.sql.ResultSet; +import java.sql.SQLException; +import java.util.Collections; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Optional; +import java.util.Set; +import java.util.stream.Collectors; + +import org.eclipse.jgit.errors.NotSupportedException; + +import com.google.gson.JsonDeserializer; +import com.google.gson.JsonSerializer; +import com.google.gson.reflect.TypeToken; +import com.typesafe.config.Config; + +import javax.sql.DataSource; +import lombok.extern.slf4j.Slf4j; + +import org.apache.gobblin.broker.SharedResourcesBrokerFactory; +import org.apache.gobblin.configuration.ConfigurationKeys; +import org.apache.gobblin.configuration.State; +import org.apache.gobblin.instrumented.Instrumented; +import org.apache.gobblin.metastore.MysqlDataSourceFactory; +import org.apache.gobblin.metrics.ContextAwareCounter; +import org.apache.gobblin.metrics.MetricContext; +import org.apache.gobblin.metrics.ServiceMetricNames; +import org.apache.gobblin.runtime.api.TopologySpec; +import org.apache.gobblin.runtime.spec_serde.GsonSerDe; +import org.apache.gobblin.service.ServiceConfigKeys; +import org.apache.gobblin.service.modules.flowgraph.Dag; +import org.apache.gobblin.service.modules.flowgraph.DagNodeId; +import org.apache.gobblin.service.modules.spec.JobExecutionPlan; +import org.apache.gobblin.service.modules.spec.JobExecutionPlanDagFactory; +import org.apache.gobblin.service.modules.spec.JobExecutionPlanListDeserializer; +import org.apache.gobblin.service.modules.spec.JobExecutionPlanListSerializer; +import org.apache.gobblin.util.ConfigUtils; +import org.apache.gobblin.util.DBStatementExecutor; + +import static org.apache.gobblin.service.ServiceConfigKeys.GOBBLIN_SERVICE_PREFIX; +import static org.apache.gobblin.service.modules.orchestration.DagManagerUtils.generateDagId; + + +/** + * An implementation of {@link DagNodeStateStore} using MySQL as a backup. + */ +@Slf4j +public class MysqlDagStateStoreV2 implements DagNodeStateStore { + + public static final String CONFIG_PREFIX = GOBBLIN_SERVICE_PREFIX + "mysqlDagStateStore"; + protected final DBStatementExecutor dbStatementExecutor; + protected final String tableName; + protected final GsonSerDe<List<JobExecutionPlan>> serDe; + private final JobExecutionPlanDagFactory jobExecPlanDagFactory; + + // todo add a column that tells if it is a running dag or a failed dag + protected static final String CREATE_TABLE_STATEMENT = "CREATE TABLE IF NOT EXISTS %s (" + + "dag_node_id VARCHAR(" + ServiceConfigKeys.MAX_DAG_NODE_ID_LENGTH + ") CHARACTER SET latin1 COLLATE latin1_bin NOT NULL, " + + "parent_dag_id VARCHAR(" + ServiceConfigKeys.MAX_DAG_ID_LENGTH + ") NOT NULL, " + + "dag_node JSON, " + + "modified_time timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, " + + "PRIMARY KEY (dag_node_id))"; + + protected static final String INSERT_STATEMENT = "INSERT INTO %s (dag_node_id, parent_dag_id, dag_node) " + + "VALUES (?, ?, ?) AS new ON DUPLICATE KEY UPDATE dag_node = new.dag_node"; + protected static final String GET_DAG_STATEMENT = "SELECT dag_node FROM %s WHERE parent_dag_id = ?"; + protected static final String GET_DAG_NODE_STATEMENT = "SELECT dag_node FROM %s WHERE dag_node_id = ?"; + protected static final String DELETE_DAG_STATEMENT = "DELETE FROM %s WHERE parent_dag_id = ?"; + protected static final String DELETE_DAG_NODE_STATEMENT = "DELETE FROM %s WHERE dag_node_id = ?"; + private final ContextAwareCounter totalDagCount; + + public MysqlDagStateStoreV2(Config config, Map<URI, TopologySpec> topologySpecMap) throws IOException { + if (config.hasPath(CONFIG_PREFIX)) { + config = config.getConfig(CONFIG_PREFIX).withFallback(config); + } + + String DEFAULT_TABLE_NAME = "dag_node_state_store"; + this.tableName = ConfigUtils.getString(config, ConfigurationKeys.STATE_STORE_DB_TABLE_KEY, DEFAULT_TABLE_NAME); + // create table if it does not exist + DataSource dataSource = MysqlDataSourceFactory.get(config, SharedResourcesBrokerFactory.getImplicitBroker()); + + try (Connection connection = dataSource.getConnection(); + PreparedStatement createStatement = connection.prepareStatement(String.format(CREATE_TABLE_STATEMENT, tableName))) { + createStatement.executeUpdate(); + connection.commit(); + } catch (SQLException e) { + throw new IOException("Failure creation table " + tableName, e); + } + this.dbStatementExecutor = new DBStatementExecutor(dataSource, log); + + JsonSerializer<List<JobExecutionPlan>> serializer = new JobExecutionPlanListSerializer(); + JsonDeserializer<List<JobExecutionPlan>> deserializer = new JobExecutionPlanListDeserializer(topologySpecMap); + Type typeToken = new TypeToken<List<JobExecutionPlan>>() { + }.getType(); + this.serDe = new GsonSerDe<>(typeToken, serializer, deserializer); + this.jobExecPlanDagFactory = new JobExecutionPlanDagFactory(); + MetricContext metricContext = + Instrumented.getMetricContext(new State(ConfigUtils.configToProperties(config)), this.getClass()); + this.totalDagCount = metricContext.contextAwareCounter(ServiceMetricNames.DAG_COUNT_MYSQL_DAG_STATE_COUNT); + + } + + @Override + public void writeCheckpoint(Dag<JobExecutionPlan> dag) + throws IOException { + DagManager.DagId dagId = DagManagerUtils.generateDagId(dag); + boolean newDag = false; + for (Dag.DagNode<JobExecutionPlan> dagNode : dag.getNodes()) { + if (addDagNodeState(dagNode, dagId) == 1) { + newDag = true; + } + } + if (newDag) { + this.totalDagCount.inc(); + } + } + + @Override + public void cleanUp(Dag<JobExecutionPlan> dag) throws IOException { + cleanUp(generateDagId(dag).toString()); + } + + @Override + public boolean cleanUp(DagManager.DagId dagId) throws IOException { + dbStatementExecutor.withPreparedStatement(String.format(DELETE_DAG_STATEMENT, tableName), deleteStatement -> { + try { + deleteStatement.setString(1, dagId.toString()); Review Comment: test is already present -- This is an automated message from the Apache Git Service. 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