Package org.apache.camel.support.cluster

Class RebalancingCamelClusterService

java.lang.Object

org.apache.camel.support.cluster.RebalancingCamelClusterService

All Implemented Interfaces:

AutoCloseable, org.apache.camel.CamelContextAware, org.apache.camel.cluster.CamelClusterService, org.apache.camel.cluster.CamelPreemptiveClusterService, org.apache.camel.Ordered, org.apache.camel.Service, org.apache.camel.spi.HasCamelContext, org.apache.camel.spi.HasId, org.apache.camel.spi.IdAware

public class RebalancingCamelClusterService
extends Object
implements org.apache.camel.cluster.CamelPreemptiveClusterService

A RebalancingCamelClusterService adds rebalancing capabilities to an underlying CamelPreemptiveClusterService. Each view is treated as a partition by this cluster service and it makes sure that all services belonging to the cluster own a balanced number of partitions (same number or difference at most 1 when not possible).

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.camel.cluster.CamelClusterService

org.apache.camel.cluster.CamelClusterService.Selector

Field Summary

Fields

Modifier and Type	Field	Description
protected org.apache.camel.CamelContext	camelContext
protected org.apache.camel.cluster.CamelPreemptiveClusterService	delegate
protected final long	periodMillis
protected ScheduledExecutorService	serializedExecutor

Fields inherited from interface org.apache.camel.Ordered

HIGHEST, LOWEST

Constructor Summary

Constructors

Constructor	Description
RebalancingCamelClusterService(org.apache.camel.CamelContext camelContext, org.apache.camel.cluster.CamelPreemptiveClusterService delegate, long periodMillis)
RebalancingCamelClusterService(org.apache.camel.cluster.CamelPreemptiveClusterService delegate, long periodMillis)

Method Summary

Modifier and Type	Method	Description
org.apache.camel.CamelContext	getCamelContext()
org.apache.camel.cluster.CamelPreemptiveClusterService	getDelegate()
String	getId()
Collection<String>	getNamespaces()
long	getPeriodMillis()
org.apache.camel.cluster.CamelPreemptiveClusterView	getView(String namespace)
boolean	isLeader(String namespace)
protected Integer	members()
protected List<String>	owned(List<String> partitions)
protected List<String>	partitionList()
protected void	rebalanceGroup(List<String> partitions, int quota)
protected void	reconcile()
void	releaseView(org.apache.camel.cluster.CamelClusterView view)
void	setCamelContext(org.apache.camel.CamelContext camelContext)
void	setDelegate(org.apache.camel.cluster.CamelPreemptiveClusterService delegate)
protected void	setDisabled(String partition, boolean disabled)
void	setId(String id)
void	start()
void	startView(String namespace)
void	stop()
void	stopView(String namespace)

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.cluster.CamelClusterService

getAttributes, getOrder, unwrap

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

setGeneratedId

Methods inherited from interface org.apache.camel.Service

build, close, init

Field Details

serializedExecutor

protected ScheduledExecutorService serializedExecutor

delegate

protected org.apache.camel.cluster.CamelPreemptiveClusterService delegate

camelContext

protected org.apache.camel.CamelContext camelContext

periodMillis

protected final long periodMillis

Constructor Details

RebalancingCamelClusterService

public RebalancingCamelClusterService(org.apache.camel.cluster.CamelPreemptiveClusterService delegate,
 long periodMillis)

RebalancingCamelClusterService

public RebalancingCamelClusterService(org.apache.camel.CamelContext camelContext,
 org.apache.camel.cluster.CamelPreemptiveClusterService delegate,
 long periodMillis)

Method Details

start

public void start()

Specified by:

start in interface org.apache.camel.Service

stop

public void stop()

Specified by:

stop in interface org.apache.camel.Service

getDelegate

public org.apache.camel.cluster.CamelPreemptiveClusterService getDelegate()

getPeriodMillis

public long getPeriodMillis()

setDelegate

public void setDelegate(org.apache.camel.cluster.CamelPreemptiveClusterService delegate)

reconcile

protected void reconcile()

rebalanceGroup

protected void rebalanceGroup(List<String> partitions,
 int quota)

setDisabled

protected void setDisabled(String partition,
 boolean disabled)

owned

protected List<String> owned(List<String> partitions)

partitionList

protected List<String> partitionList()

members

protected Integer members()

getView

public org.apache.camel.cluster.CamelPreemptiveClusterView getView(String namespace)
                                                            throws Exception

Specified by:

getView in interface org.apache.camel.cluster.CamelClusterService

Specified by:

getView in interface org.apache.camel.cluster.CamelPreemptiveClusterService

Throws:

Exception

releaseView

public void releaseView(org.apache.camel.cluster.CamelClusterView view)
                 throws Exception

Specified by:

releaseView in interface org.apache.camel.cluster.CamelClusterService

Throws:

Exception

getNamespaces

public Collection<String> getNamespaces()

Specified by:

getNamespaces in interface org.apache.camel.cluster.CamelClusterService

startView

public void startView(String namespace)
               throws Exception

Specified by:

startView in interface org.apache.camel.cluster.CamelClusterService

Throws:

Exception

stopView

public void stopView(String namespace)
              throws Exception

Specified by:

stopView in interface org.apache.camel.cluster.CamelClusterService

Throws:

Exception

isLeader

public boolean isLeader(String namespace)

Specified by:

isLeader in interface org.apache.camel.cluster.CamelClusterService

setCamelContext

public void setCamelContext(org.apache.camel.CamelContext camelContext)

Specified by:

setCamelContext in interface org.apache.camel.CamelContextAware

getCamelContext

public org.apache.camel.CamelContext getCamelContext()

Specified by:

getCamelContext in interface org.apache.camel.spi.HasCamelContext

setId

public void setId(String id)

Specified by:

setId in interface org.apache.camel.spi.IdAware

getId

public String getId()

Specified by:

getId in interface org.apache.camel.spi.HasId