service/src/main/java/io/mifos/accounting/service/internal/repository/JournalEntryRepository.java

/*
 * 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 io.mifos.accounting.service.internal.repository;

import com.datastax.driver.core.ResultSet;
import com.datastax.driver.core.Session;
import com.datastax.driver.core.SimpleStatement;
import com.datastax.driver.core.Statement;
import com.datastax.driver.core.querybuilder.QueryBuilder;
import com.datastax.driver.mapping.Mapper;
import com.datastax.driver.mapping.Result;
import io.mifos.core.cassandra.core.CassandraSessionProvider;
import io.mifos.core.cassandra.core.TenantAwareCassandraMapperProvider;
import io.mifos.core.cassandra.core.TenantAwareEntityTemplate;
import io.mifos.core.lang.DateConverter;
import io.mifos.core.lang.DateRange;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;

@SuppressWarnings({"unused"})
@Repository
public class JournalEntryRepository {

  private final CassandraSessionProvider cassandraSessionProvider;
  private final TenantAwareCassandraMapperProvider tenantAwareCassandraMapperProvider;
  private final TenantAwareEntityTemplate tenantAwareEntityTemplate;

  @Autowired
  public JournalEntryRepository(final CassandraSessionProvider cassandraSessionProvider,
                                final TenantAwareCassandraMapperProvider tenantAwareCassandraMapperProvider,
                                final TenantAwareEntityTemplate tenantAwareEntityTemplate) {
    super();
    this.cassandraSessionProvider = cassandraSessionProvider;
    this.tenantAwareCassandraMapperProvider = tenantAwareCassandraMapperProvider;
    this.tenantAwareEntityTemplate = tenantAwareEntityTemplate;
  }

  public void saveJournalEntry(final JournalEntryEntity journalEntryEntity) {
    this.tenantAwareEntityTemplate.save(journalEntryEntity);

    final JournalEntryLookup journalEntryLookup = new JournalEntryLookup();
    journalEntryLookup.setTransactionIdentifier(journalEntryEntity.getTransactionIdentifier());
    journalEntryLookup.setDateBucket(journalEntryEntity.getDateBucket());
    this.tenantAwareEntityTemplate.save(journalEntryLookup);
  }

  public List<JournalEntryEntity> fetchJournalEntries(final DateRange range) {
    final Session tenantSession = this.cassandraSessionProvider.getTenantSession();

    final List<String> datesInBetweenRange
        = range.stream()
        .map(DateConverter::toIsoString)
        .collect(Collectors.toList());

    final Statement stmt = new SimpleStatement(
        QueryBuilder
            .select().all()
            .from("thoth_journal_entries")
            .where(QueryBuilder.in("date_bucket", datesInBetweenRange)).getQueryString(),
        datesInBetweenRange.toArray()
    );

    final ResultSet resultSet = tenantSession.execute(stmt);

    final Mapper<JournalEntryEntity> mapper = this.tenantAwareCassandraMapperProvider.getMapper(JournalEntryEntity.class);
    final Result<JournalEntryEntity> journalEntryEntities = mapper.map(resultSet);
    return journalEntryEntities.all();
  }

  public Optional<JournalEntryEntity> findJournalEntry(final String transactionIdentifier) {
    final Optional<JournalEntryLookup> optionalJournalEntryLookup = this.tenantAwareEntityTemplate.findById(JournalEntryLookup.class, transactionIdentifier);
    if (optionalJournalEntryLookup.isPresent()) {
      final JournalEntryLookup journalEntryLookup = optionalJournalEntryLookup.get();
      final List<JournalEntryEntity> journalEntryEntities = this.tenantAwareEntityTemplate.fetchByKeys(JournalEntryEntity.class, journalEntryLookup.getDateBucket(),
          journalEntryLookup.getTransactionIdentifier());
      return Optional.of(journalEntryEntities.get(0));
    } else {
      return Optional.empty();
    }
  }
}