| /* |
| * 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.fineract.cn.cassandra.core; |
| |
| import com.datastax.driver.core.DataType; |
| import com.datastax.driver.core.KeyspaceMetadata; |
| import com.datastax.driver.core.ParseUtils; |
| import com.datastax.driver.core.ResultSet; |
| import com.datastax.driver.core.Row; |
| import com.datastax.driver.core.Session; |
| import com.datastax.driver.core.TableMetadata; |
| import com.datastax.driver.core.querybuilder.QueryBuilder; |
| import com.datastax.driver.core.schemabuilder.SchemaBuilder; |
| import org.apache.fineract.cn.lang.ApplicationName; |
| import org.slf4j.Logger; |
| |
| import java.util.Objects; |
| |
| @SuppressWarnings({"WeakerAccess", "unused"}) |
| public class CassandraJourney { |
| |
| private final Logger logger; |
| private final ApplicationName applicationName; |
| private final Session session; |
| private final String schemaTableName; |
| |
| public CassandraJourney(final Logger logger, final ApplicationName applicationName, final Session session) { |
| super(); |
| this.applicationName = applicationName; |
| this.logger = logger; |
| this.session = session; |
| this.schemaTableName = this.applicationName.getServiceName() + "_cassandra_schema_table"; |
| } |
| |
| public void start(final CassandraJourneyRoute cassandraJourneyRoute) { |
| // check for version |
| final ResultSet resultSet = session.execute( |
| QueryBuilder |
| .select("hash_value") |
| .from(this.schemaTableName) |
| .where(QueryBuilder.eq("version", cassandraJourneyRoute.getVersion())) |
| ); |
| |
| if (!resultSet.isExhausted()) { |
| final Row row = resultSet.one(); |
| final Integer fetchedHashValue = row.get("hash_value", Integer.class); |
| if (!Objects.equals(fetchedHashValue, cassandraJourneyRoute.getHashValue())) { |
| throw new IllegalStateException("Version mismatch for " + cassandraJourneyRoute.getVersion()); |
| } |
| } else { |
| cassandraJourneyRoute.getCassandraJourneyWaypoints() |
| .forEach(waypoint -> this.session.execute(waypoint.getStatement())); |
| |
| this.session.execute( |
| QueryBuilder |
| .insertInto(this.schemaTableName) |
| .value("version", cassandraJourneyRoute.getVersion()) |
| .value("hash_value", cassandraJourneyRoute.getHashValue()) |
| ); |
| } |
| } |
| |
| void init() { |
| final KeyspaceMetadata keyspaceMetadata = |
| session.getCluster().getMetadata().getKeyspace(session.getLoggedKeyspace()); |
| final TableMetadata schemaTable = keyspaceMetadata.getTable(ParseUtils.quote(this.schemaTableName)); |
| if (schemaTable == null) { |
| try { |
| session.execute(SchemaBuilder |
| .createTable(this.schemaTableName) |
| .addPartitionKey("version", DataType.text()) |
| .addColumn("hash_value", DataType.cint()) |
| .buildInternal() |
| ); |
| } catch (final Throwable th) { |
| this.logger.warn("Schema table for '{}' already exists.", this.applicationName.getServiceName()); |
| } |
| } |
| } |
| } |