Module net.javacrumbs.shedlock.provider.jdbctemplate

Package net.javacrumbs.shedlock.provider.jdbctemplate

Class JdbcTemplateLockProvider

java.lang.Object

net.javacrumbs.shedlock.support.StorageBasedLockProvider

net.javacrumbs.shedlock.provider.jdbctemplate.JdbcTemplateLockProvider

All Implemented Interfaces:

net.javacrumbs.shedlock.core.ExtensibleLockProvider, net.javacrumbs.shedlock.core.LockProvider

public class JdbcTemplateLockProvider
extends net.javacrumbs.shedlock.support.StorageBasedLockProvider

Lock provided by JdbcTemplate. 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.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	JdbcTemplateLockProvider.ColumnNames
static final class	JdbcTemplateLockProvider.Configuration

Constructor Summary

Constructors

Constructor	Description
JdbcTemplateLockProvider(DataSource dataSource)
JdbcTemplateLockProvider(DataSource dataSource, String tableName)
JdbcTemplateLockProvider(JdbcTemplateLockProvider.Configuration configuration)
JdbcTemplateLockProvider(org.springframework.jdbc.core.JdbcTemplate jdbcTemplate)
JdbcTemplateLockProvider(org.springframework.jdbc.core.JdbcTemplate jdbcTemplate, String tableName)
JdbcTemplateLockProvider(org.springframework.jdbc.core.JdbcTemplate jdbcTemplate, org.springframework.transaction.PlatformTransactionManager transactionManager)
JdbcTemplateLockProvider(org.springframework.jdbc.core.JdbcTemplate jdbcTemplate, org.springframework.transaction.PlatformTransactionManager transactionManager, 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 Details

JdbcTemplateLockProvider

public JdbcTemplateLockProvider(org.springframework.jdbc.core.JdbcTemplate jdbcTemplate)

JdbcTemplateLockProvider

public JdbcTemplateLockProvider(org.springframework.jdbc.core.JdbcTemplate jdbcTemplate,
 org.springframework.transaction.PlatformTransactionManager transactionManager)

JdbcTemplateLockProvider

public JdbcTemplateLockProvider(org.springframework.jdbc.core.JdbcTemplate jdbcTemplate,
 String tableName)

JdbcTemplateLockProvider

public JdbcTemplateLockProvider(DataSource dataSource)

JdbcTemplateLockProvider

public JdbcTemplateLockProvider(DataSource dataSource,
 String tableName)

JdbcTemplateLockProvider

public JdbcTemplateLockProvider(org.springframework.jdbc.core.JdbcTemplate jdbcTemplate,
 org.springframework.transaction.PlatformTransactionManager transactionManager,
 String tableName)

JdbcTemplateLockProvider

public JdbcTemplateLockProvider(JdbcTemplateLockProvider.Configuration configuration)