org.apache.camel.processor.aggregate.cassandra

Class CassandraAggregationRepository

java.lang.Object

org.apache.camel.support.ServiceSupport

org.apache.camel.processor.aggregate.cassandra.CassandraAggregationRepository

All Implemented Interfaces:

org.apache.camel.Service, org.apache.camel.ShutdownableService, org.apache.camel.spi.AggregationRepository, org.apache.camel.spi.RecoverableAggregationRepository, org.apache.camel.StatefulService, org.apache.camel.SuspendableService

Direct Known Subclasses:

NamedCassandraAggregationRepository

public class CassandraAggregationRepository
extends org.apache.camel.support.ServiceSupport
implements org.apache.camel.spi.RecoverableAggregationRepository

Implementation of AggregationRepository using Cassandra table to store exchanges. Advice: use LeveledCompaction for this table and tune read/write consistency levels. Warning: Cassandra is not the best tool for queuing use cases See: http://www.datastax.com/dev/blog/cassandra-anti-patterns-queues-and-queue-like-datasets

Field Summary

Fields inherited from class org.apache.camel.support.ServiceSupport

shutdown, shuttingdown, started, starting, stopped, stopping, suspended, suspending

Constructor Summary

Constructors

Constructor and Description
CassandraAggregationRepository()
CassandraAggregationRepository(com.datastax.driver.core.Cluster cluster, String keyspace)
CassandraAggregationRepository(com.datastax.driver.core.Session session)

Method Summary

Methods

Modifier and Type	Method and Description
org.apache.camel.Exchange	add(org.apache.camel.CamelContext camelContext, String key, org.apache.camel.Exchange exchange) Insert or update exchange in aggregation table.
void	confirm(org.apache.camel.CamelContext camelContext, String exchangeId) Remove exchange by Id from aggregation table.
protected void	doStart()
protected void	doStop()
org.apache.camel.Exchange	get(org.apache.camel.CamelContext camelContext, String key) Get exchange from aggregation table by aggregation key.
String	getDeadLetterUri()
String	getExchangeColumn()
String	getExchangeIdColumn()
Set<String>	getKeys() Get aggregation exchangeIds from aggregation table.
int	getMaximumRedeliveries()
String[]	getPKColumns()
protected Object[]	getPKValues(String key) Generate primary key values from aggregation key.
Object[]	getPrefixPKValues()
com.datastax.driver.core.ConsistencyLevel	getReadConsistencyLevel()
long	getRecoveryIntervalInMillis()
com.datastax.driver.core.Session	getSession()
String	getTable()
Integer	getTtl()
com.datastax.driver.core.ConsistencyLevel	getWriteConsistencyLevel()
protected void	initSelectStatement()
boolean	isUseRecovery()
org.apache.camel.Exchange	recover(org.apache.camel.CamelContext camelContext, String exchangeId) Get exchange by exchange ID.
void	remove(org.apache.camel.CamelContext camelContext, String key, org.apache.camel.Exchange exchange) Remove exchange by aggregation key from aggregation table.
Set<String>	scan(org.apache.camel.CamelContext camelContext) Get exchange IDs to be recovered
protected List<com.datastax.driver.core.Row>	selectKeyIds()
void	setDeadLetterUri(String deadLetterUri)
void	setExchangeColumn(String exchangeColumnName)
void	setExchangeIdColumn(String exchangeIdColumn)
void	setMaximumRedeliveries(int maximumRedeliveries)
void	setPKColumns(String... pkColumns)
void	setPrefixPKValues(Object... prefixPKValues)
void	setReadConsistencyLevel(com.datastax.driver.core.ConsistencyLevel readConsistencyLevel)
void	setRecoveryInterval(long recoveryIntervalInMillis)
void	setRecoveryInterval(long interval, TimeUnit timeUnit)
void	setRecoveryIntervalInMillis(long recoveryIntervalInMillis)
void	setSession(com.datastax.driver.core.Session session)
void	setTable(String table)
void	setTtl(Integer ttl)
void	setUseRecovery(boolean useRecovery)
void	setWriteConsistencyLevel(com.datastax.driver.core.ConsistencyLevel writeConsistencyLevel)

Methods inherited from class org.apache.camel.support.ServiceSupport

doResume, doShutdown, doSuspend, getStatus, getVersion, isRunAllowed, isStarted, isStarting, 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

Constructor Detail

CassandraAggregationRepository

public CassandraAggregationRepository()

CassandraAggregationRepository

public CassandraAggregationRepository(com.datastax.driver.core.Session session)

CassandraAggregationRepository

public CassandraAggregationRepository(com.datastax.driver.core.Cluster cluster,
                              String keyspace)

Method Detail

getPKValues

protected Object[] getPKValues(String key)

Generate primary key values from aggregation key.

doStart

protected void doStart()
                throws Exception

Specified by:

doStart in class org.apache.camel.support.ServiceSupport

Throws:

Exception

doStop

protected void doStop()
               throws Exception

Specified by:

doStop in class org.apache.camel.support.ServiceSupport

Throws:

Exception

add

public org.apache.camel.Exchange add(org.apache.camel.CamelContext camelContext,
                            String key,
                            org.apache.camel.Exchange exchange)

Insert or update exchange in aggregation table.

Specified by:

add in interface org.apache.camel.spi.AggregationRepository

initSelectStatement

protected void initSelectStatement()

get

public org.apache.camel.Exchange get(org.apache.camel.CamelContext camelContext,
                            String key)

Get exchange from aggregation table by aggregation key.

Specified by:

get in interface org.apache.camel.spi.AggregationRepository

confirm

public void confirm(org.apache.camel.CamelContext camelContext,
           String exchangeId)

Remove exchange by Id from aggregation table.

Specified by:

confirm in interface org.apache.camel.spi.AggregationRepository

remove

public void remove(org.apache.camel.CamelContext camelContext,
          String key,
          org.apache.camel.Exchange exchange)

Remove exchange by aggregation key from aggregation table.

Specified by:

remove in interface org.apache.camel.spi.AggregationRepository

selectKeyIds

protected List<com.datastax.driver.core.Row> selectKeyIds()

getKeys

public Set<String> getKeys()

Get aggregation exchangeIds from aggregation table.

Specified by:

getKeys in interface org.apache.camel.spi.AggregationRepository

scan

public Set<String> scan(org.apache.camel.CamelContext camelContext)

Get exchange IDs to be recovered

Specified by:

scan in interface org.apache.camel.spi.RecoverableAggregationRepository

Returns:

Exchange IDs

recover

public org.apache.camel.Exchange recover(org.apache.camel.CamelContext camelContext,
                                String exchangeId)

Get exchange by exchange ID. This is far from optimal.

Specified by:

recover in interface org.apache.camel.spi.RecoverableAggregationRepository

getSession

public com.datastax.driver.core.Session getSession()

setSession

public void setSession(com.datastax.driver.core.Session session)

getTable

public String getTable()

setTable

public void setTable(String table)

getPrefixPKValues

public Object[] getPrefixPKValues()

setPrefixPKValues

public void setPrefixPKValues(Object... prefixPKValues)

getPKColumns

public String[] getPKColumns()

setPKColumns

public void setPKColumns(String... pkColumns)

getExchangeIdColumn

public String getExchangeIdColumn()

setExchangeIdColumn

public void setExchangeIdColumn(String exchangeIdColumn)

getWriteConsistencyLevel

public com.datastax.driver.core.ConsistencyLevel getWriteConsistencyLevel()

setWriteConsistencyLevel

public void setWriteConsistencyLevel(com.datastax.driver.core.ConsistencyLevel writeConsistencyLevel)

getReadConsistencyLevel

public com.datastax.driver.core.ConsistencyLevel getReadConsistencyLevel()

setReadConsistencyLevel

public void setReadConsistencyLevel(com.datastax.driver.core.ConsistencyLevel readConsistencyLevel)

getExchangeColumn

public String getExchangeColumn()

setExchangeColumn

public void setExchangeColumn(String exchangeColumnName)

getTtl

public Integer getTtl()

setTtl

public void setTtl(Integer ttl)

getRecoveryIntervalInMillis

public long getRecoveryIntervalInMillis()

Specified by:

getRecoveryIntervalInMillis in interface org.apache.camel.spi.RecoverableAggregationRepository

setRecoveryIntervalInMillis

public void setRecoveryIntervalInMillis(long recoveryIntervalInMillis)

setRecoveryInterval

public void setRecoveryInterval(long interval,
                       TimeUnit timeUnit)

Specified by:

setRecoveryInterval in interface org.apache.camel.spi.RecoverableAggregationRepository

setRecoveryInterval

public void setRecoveryInterval(long recoveryIntervalInMillis)

Specified by:

setRecoveryInterval in interface org.apache.camel.spi.RecoverableAggregationRepository

isUseRecovery

public boolean isUseRecovery()

Specified by:

isUseRecovery in interface org.apache.camel.spi.RecoverableAggregationRepository

setUseRecovery

public void setUseRecovery(boolean useRecovery)

Specified by:

setUseRecovery in interface org.apache.camel.spi.RecoverableAggregationRepository

getDeadLetterUri

public String getDeadLetterUri()

Specified by:

getDeadLetterUri in interface org.apache.camel.spi.RecoverableAggregationRepository

setDeadLetterUri

public void setDeadLetterUri(String deadLetterUri)

Specified by:

setDeadLetterUri in interface org.apache.camel.spi.RecoverableAggregationRepository

getMaximumRedeliveries

public int getMaximumRedeliveries()

Specified by:

getMaximumRedeliveries in interface org.apache.camel.spi.RecoverableAggregationRepository

setMaximumRedeliveries

public void setMaximumRedeliveries(int maximumRedeliveries)

Specified by:

setMaximumRedeliveries in interface org.apache.camel.spi.RecoverableAggregationRepository