com.builtamont.cassandra.migration.internal.command.Baseline.kt Maven / Gradle / Ivy
/**
* File : Baseline.kt
* License :
* Original - Copyright (c) 2015 - 2016 Contrast Security
* Derivative - Copyright (c) 2016 Citadel Technology Solutions Pte Ltd
*
* Licensed 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 com.builtamont.cassandra.migration.internal.command
import com.builtamont.cassandra.migration.api.CassandraMigrationException
import com.builtamont.cassandra.migration.api.MigrationVersion
import com.builtamont.cassandra.migration.api.resolver.MigrationResolver
import com.builtamont.cassandra.migration.internal.dbsupport.SchemaVersionDAO
/**
* Handles the baseline command.
*
* @param migrationResolver The Cassandra migration resolver.
* @param baselineVersion The baseline version of the migration.
* @param schemaVersionDAO The Cassandra migration schema version DAO.
* @param baselineDescription The baseline version description / comments.
* @param user The user to execute the migration as.
*/
class Baseline(
private val migrationResolver: MigrationResolver,
private val baselineVersion: MigrationVersion,
private val schemaVersionDAO: SchemaVersionDAO,
private val baselineDescription: String,
private val user: String
) {
/**
* Runs the migration baselining.
*
* @return The number of successfully applied migration baselining.
* @throws CassandraMigrationException when migration baselining failed for any reason.
*/
@Throws(CassandraMigrationException::class)
fun run() {
val baselineMigration = schemaVersionDAO.baselineMarker
if (schemaVersionDAO.hasAppliedMigrations()) {
val msg = "Unable to baseline metadata table ${schemaVersionDAO.tableName} as it already contains migrations"
throw CassandraMigrationException(msg)
}
if (schemaVersionDAO.hasBaselineMarker()) {
val isNotBaselineByVersion = !(baselineMigration.version?.equals(baselineVersion) ?: false)
val isNotBaselineByDescription = !baselineMigration.description.equals(baselineDescription)
if (isNotBaselineByVersion || isNotBaselineByDescription) {
val msg = "Unable to baseline metadata table ${schemaVersionDAO.tableName} with ($baselineVersion, $baselineDescription)" +
" as it has already been initialized with (${baselineMigration.version}, ${baselineMigration.description})"
throw CassandraMigrationException(msg)
}
} else {
if (baselineVersion.equals(MigrationVersion.fromVersion("0"))) {
val msg = "Unable to baseline metadata table ${schemaVersionDAO.tableName} with version 0 as this version was used for schema creation"
throw CassandraMigrationException(msg)
}
schemaVersionDAO.addBaselineMarker(baselineVersion, baselineDescription, user)
}
}
}