net.javacrumbs.shedlock.provider.jdbc.micronaut.MicronautJdbcLockProvider Maven / Gradle / Ivy
/**
* Copyright 2009-2021 the original author or authors.
*
* 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 net.javacrumbs.shedlock.provider.jdbc.micronaut;
import io.micronaut.transaction.TransactionOperations;
import io.micronaut.transaction.jdbc.DataSourceTransactionManager;
import java.sql.Connection;
import javax.sql.DataSource;
import net.javacrumbs.shedlock.support.StorageBasedLockProvider;
import net.javacrumbs.shedlock.support.annotation.NonNull;
/**
* Lock provided by plain JDBC, using the Micronaut Data transaction manager. It
* uses a table that contains lock_name and locked_until.
*
*
* - Attempts to insert a new lock record. Since lock name is a primary key,
* it fails if the record already exists. As an optimization, we keep in-memory
* track of created lock records.
*
- If the insert succeeds (1 inserted row) we have the lock.
*
- If the insert failed due to duplicate key or we have skipped the
* insertion, we will try to update lock record using UPDATE tableName SET
* lock_until = :lockUntil WHERE name = :lockName AND lock_until <= :now
*
- If the update succeeded (1 updated row), we have the lock. If the update
* failed (0 updated rows) somebody else holds the lock
*
- When unlocking, lock_until is set to now.
*
*/
public class MicronautJdbcLockProvider extends StorageBasedLockProvider {
private static final String DEFAULT_TABLE_NAME = "shedlock";
/**
* @deprecated Use {@link #MicronautJdbcLockProvider(TransactionOperations)}
* instead as transaction management has be refactored in Micronaut
* Data 4.0 and DataSourceTransactionManager is not easy to
* construct.
*/
@Deprecated
public MicronautJdbcLockProvider(@NonNull DataSource datasource) {
this(new DataSourceTransactionManager(datasource), DEFAULT_TABLE_NAME);
}
public MicronautJdbcLockProvider(@NonNull TransactionOperations transactionManager) {
this(transactionManager, DEFAULT_TABLE_NAME);
}
public MicronautJdbcLockProvider(
@NonNull TransactionOperations transactionManager, @NonNull String tableName) {
super(new MicronautJdbcStorageAccessor(transactionManager, tableName));
}
}