Package org.apache.camel.processor.idempotent.jdbc

Class JdbcOrphanLockAwareIdempotentRepository

java.lang.Object

org.apache.camel.support.service.BaseService

org.apache.camel.support.service.ServiceSupport

org.apache.camel.processor.idempotent.jdbc.AbstractJdbcMessageIdRepository

org.apache.camel.processor.idempotent.jdbc.JdbcMessageIdRepository

org.apache.camel.processor.idempotent.jdbc.JdbcOrphanLockAwareIdempotentRepository

All Implemented Interfaces:

AutoCloseable, org.apache.camel.Service, org.apache.camel.ShutdownableService, org.apache.camel.spi.IdempotentRepository, org.apache.camel.StatefulService, org.apache.camel.SuspendableService

public class JdbcOrphanLockAwareIdempotentRepository
extends JdbcMessageIdRepository
implements org.apache.camel.ShutdownableService

Implementation of AbstractJdbcMessageIdRepository which handles orphan locks resulting from jvm crash. When an instance of the application acquires a lock on the idempotent repository, the lock attributes are added to a HashSet. While the lock is help by the instance, the instance keeps updating the createdAt column with the current timestamp indicating the instance holding the lock is active. A lock is granted to an instance if either the entry for the lock attributes do not exists in the CAMEL_MESSAGEPROCESSED table or if in case the instance holding the lock has crashed. This is determined if the timestamp on the createdAt column is more than the lockMaxAge.

Field Summary

Fields inherited from class org.apache.camel.processor.idempotent.jdbc.JdbcMessageIdRepository

DEFAULT_CLEAR_STRING, DEFAULT_CREATE_STRING, DEFAULT_DELETE_STRING, DEFAULT_INSERT_STRING, DEFAULT_QUERY_STRING, DEFAULT_TABLE_EXISTS_STRING, DEFAULT_TABLENAME

Fields inherited from class org.apache.camel.processor.idempotent.jdbc.AbstractJdbcMessageIdRepository

dataSource, jdbcTemplate, log, processorName, transactionTemplate

Fields inherited from class org.apache.camel.support.service.BaseService

BUILT, FAILED, INITIALIZED, INITIALIZING, lock, NEW, SHUTDOWN, SHUTTING_DOWN, STARTED, STARTING, status, STOPPED, STOPPING, SUSPENDED, SUSPENDING

Constructor Summary

Constructors

Constructor	Description
JdbcOrphanLockAwareIdempotentRepository(DataSource dataSource, String processorName, org.apache.camel.CamelContext camelContext)
JdbcOrphanLockAwareIdempotentRepository(DataSource dataSource, org.springframework.transaction.support.TransactionTemplate transactionTemplate, String processorName, org.apache.camel.CamelContext camelContext)
JdbcOrphanLockAwareIdempotentRepository(org.apache.camel.CamelContext camelContext)
JdbcOrphanLockAwareIdempotentRepository(org.springframework.jdbc.core.JdbcTemplate jdbcTemplate, org.springframework.transaction.support.TransactionTemplate transactionTemplate, org.apache.camel.CamelContext camelContext)

Method Summary

Modifier and Type	Method	Description
protected int	delete()	Operations that deletes all the rows
protected int	delete(String key)	Operations that deletes the key if it exists
protected void	doInit()
protected void	doShutdown()
long	getLockKeepAliveIntervalMillis()
long	getLockMaxAgeMillis()
Set<org.apache.camel.processor.idempotent.jdbc.JdbcOrphanLockAwareIdempotentRepository.ProcessorNameAndMessageId>	getProcessorNameMessageIdSet()
String	getUpdateTimestampQuery()
protected int	insert(String key)	Operation that inserts the key if it does not already exist
protected int	queryForInt(String key)	Operation that returns the number of rows, if any, for the specified key
void	setLockKeepAliveIntervalMillis(long lockKeepAliveIntervalMillis)
void	setLockMaxAgeMillis(long lockMaxAgeMillis)
void	setUpdateTimestampQuery(String updateTimestampQuery)

Methods inherited from class org.apache.camel.processor.idempotent.jdbc.JdbcMessageIdRepository

doStart, getClearString, getCreateString, getDeleteString, getInsertString, getQueryString, getTableExistsString, getTableName, isCreateTableIfNotExists, setClearString, setCreateString, setCreateTableIfNotExists, setDeleteString, setInsertString, setQueryString, setTableExistsString, setTableName

Methods inherited from class org.apache.camel.processor.idempotent.jdbc.AbstractJdbcMessageIdRepository

add, clear, confirm, contains, createTransactionTemplate, doStop, getDataSource, getJdbcTemplate, getProcessorName, getTransactionTemplate, remove, setDataSource, setJdbcTemplate, setProcessorName, setTransactionTemplate

Methods inherited from class org.apache.camel.support.service.BaseService

build, doBuild, doFail, doLifecycleChange, doResume, doSuspend, fail, getStatus, init, isBuild, isInit, isNew, isRunAllowed, isShutdown, isStarted, isStarting, isStartingOrStarted, isStopped, isStopping, isStoppingOrStopped, isSuspended, isSuspending, isSuspendingOrSuspended, resume, shutdown, start, stop, suspend

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.camel.spi.IdempotentRepository

add, confirm, contains, remove

Methods inherited from interface org.apache.camel.Service

build, close, init, start, stop

Methods inherited from interface org.apache.camel.ShutdownableService

shutdown

Methods inherited from interface org.apache.camel.StatefulService

getStatus, isRunAllowed, isStarted, isStarting, isStopped, isStopping, isSuspending

Methods inherited from interface org.apache.camel.SuspendableService

isSuspended, resume, suspend

Constructor Detail

JdbcOrphanLockAwareIdempotentRepository

public JdbcOrphanLockAwareIdempotentRepository(org.apache.camel.CamelContext camelContext)

JdbcOrphanLockAwareIdempotentRepository

public JdbcOrphanLockAwareIdempotentRepository(DataSource dataSource,
                                               String processorName,
                                               org.apache.camel.CamelContext camelContext)

JdbcOrphanLockAwareIdempotentRepository

public JdbcOrphanLockAwareIdempotentRepository(DataSource dataSource,
                                               org.springframework.transaction.support.TransactionTemplate transactionTemplate,
                                               String processorName,
                                               org.apache.camel.CamelContext camelContext)

JdbcOrphanLockAwareIdempotentRepository

public JdbcOrphanLockAwareIdempotentRepository(org.springframework.jdbc.core.JdbcTemplate jdbcTemplate,
                                               org.springframework.transaction.support.TransactionTemplate transactionTemplate,
                                               org.apache.camel.CamelContext camelContext)

Method Detail

queryForInt

protected int queryForInt(String key)

Description copied from class: AbstractJdbcMessageIdRepository

Operation that returns the number of rows, if any, for the specified key

Overrides:

queryForInt in class JdbcMessageIdRepository

Parameters:

key - the key

Returns:

int number of rows

delete

protected int delete(String key)

Description copied from class: AbstractJdbcMessageIdRepository

Operations that deletes the key if it exists

Overrides:

delete in class JdbcMessageIdRepository

Parameters:

key - the key

Returns:

int number of rows deleted

insert

protected int insert(String key)

Description copied from class: AbstractJdbcMessageIdRepository

Operation that inserts the key if it does not already exist

Overrides:

insert in class JdbcMessageIdRepository

Parameters:

key - the key

Returns:

int number of rows inserted

doInit

protected void doInit()
               throws Exception

Overrides:

doInit in class JdbcMessageIdRepository

Throws:

Exception

doShutdown

protected void doShutdown()
                   throws Exception

Overrides:

doShutdown in class org.apache.camel.support.service.BaseService

Throws:

Exception

delete

protected int delete()

Description copied from class: AbstractJdbcMessageIdRepository

Operations that deletes all the rows

Overrides:

delete in class JdbcMessageIdRepository

Returns:

int number of rows deleted

getProcessorNameMessageIdSet

public Set<org.apache.camel.processor.idempotent.jdbc.JdbcOrphanLockAwareIdempotentRepository.ProcessorNameAndMessageId> getProcessorNameMessageIdSet()

getUpdateTimestampQuery

public String getUpdateTimestampQuery()

setUpdateTimestampQuery

public void setUpdateTimestampQuery(String updateTimestampQuery)

getLockMaxAgeMillis

public long getLockMaxAgeMillis()

setLockMaxAgeMillis

public void setLockMaxAgeMillis(long lockMaxAgeMillis)

getLockKeepAliveIntervalMillis

public long getLockKeepAliveIntervalMillis()

setLockKeepAliveIntervalMillis

public void setLockKeepAliveIntervalMillis(long lockKeepAliveIntervalMillis)