io.aeron.archive.ArchiveMigrationPlanner Maven / Gradle / Ivy
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/*
* Copyright 2014-2024 Real Logic Limited.
*
* 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
*
* https://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.aeron.archive;
import java.util.ArrayList;
import java.util.List;
/**
* Creates a series of migration steps given a starting semantic version.
*
* Migration steps are stored statically in a list sorted by order of operation. Each has
* a minimum version. The first step that has a minimum version greater than the passed in version forms
* the start of the migration steps. All steps afterward are included in the migration.
*
* A step need not be a complete operation. A series of operations may be broken down in steps and
* included with the same minimum version.
*/
final class ArchiveMigrationPlanner
{
private static final ArrayList ALL_MIGRATION_STEPS = new ArrayList<>();
static
{
ALL_MIGRATION_STEPS.add(new ArchiveMigration_0_1());
ALL_MIGRATION_STEPS.add(new ArchiveMigration_1_2());
ALL_MIGRATION_STEPS.add(new ArchiveMigration_2_3());
// as migrations are added, they are added to the static list in order of operation
}
private ArchiveMigrationPlanner()
{
}
static List createPlan(final int version)
{
final List steps = new ArrayList<>();
for (int i = 0, size = ALL_MIGRATION_STEPS.size(); i < size; i++)
{
if (ALL_MIGRATION_STEPS.get(i).minimumVersion() > version)
{
steps.addAll(ALL_MIGRATION_STEPS.subList(i, size));
break;
}
}
return steps;
}
}