Package net.javacrumbs.shedlock.provider.jdbc

Class JdbcLockProvider

java.lang.Object

net.javacrumbs.shedlock.support.StorageBasedLockProvider

net.javacrumbs.shedlock.provider.jdbc.JdbcLockProvider

All Implemented Interfaces:

LockProvider

public class JdbcLockProvider
extends StorageBasedLockProvider

Lock provided by plain JDBC. It uses a table that contains lock_name and locked_until.

1. 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.
2. If the insert succeeds (1 inserted row) we have the lock.
3. 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
4. If the update succeeded (1 updated row), we have the lock. If the update failed (0 updated rows) somebody else holds the lock
5. When unlocking, lock_until is set to now.

Constructor Summary

Constructors

Constructor	Description
JdbcLockProvider(@NotNull DataSource datasource)
JdbcLockProvider(@NotNull DataSource datasource, @NotNull String tableName)

Method Summary

Methods inherited from class net.javacrumbs.shedlock.support.StorageBasedLockProvider

clearCache, doLock, lock

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JdbcLockProvider

public JdbcLockProvider(@NotNull
                        @NotNull DataSource datasource)

JdbcLockProvider

public JdbcLockProvider(@NotNull
                        @NotNull DataSource datasource,
                        @NotNull
                        @NotNull String tableName)