Package org.springframework.data.gemfire.listener

Class ContinuousQueryListenerContainer

java.lang.Object

org.springframework.data.gemfire.listener.ContinuousQueryListenerContainer

All Implemented Interfaces:

Aware, BeanFactoryAware, BeanNameAware, DisposableBean, InitializingBean, Lifecycle, Phased, SmartLifecycle

public class ContinuousQueryListenerContainer
extends Object
implements BeanFactoryAware, BeanNameAware, InitializingBean, DisposableBean, SmartLifecycle

Container providing asynchronous processing/handling for Apache Geode Continuous Queries (CQ).

Since:

1.1.0

Author:

Costin Leau, John Blum

See Also:

• Executor
• RegionService
• Pool
• PoolManager
• CqAttributes
• CqEvent
• CqListener
• CqQuery
• QueryService
• BeanFactory
• BeanFactoryAware
• BeanNameAware
• DisposableBean
• InitializingBean
• SmartLifecycle
• SimpleAsyncTaskExecutor
• TaskExecutor
• PoolResolver
• DefaultableDelegatingPoolAdapter
• DelegatingPoolAdapter
• ErrorHandler

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	ContinuousQueryListenerContainer.EventDispatcherAdapter

Field Summary

Fields

Modifier and Type	Field	Description
protected static final PoolResolver	DEFAULT_POOL_RESOLVER
static final String	DEFAULT_THREAD_NAME_PREFIX
protected final org.slf4j.Logger	logger

Fields inherited from interface org.springframework.context.SmartLifecycle

DEFAULT_PHASE

Constructor Summary

Constructors

Constructor	Description
ContinuousQueryListenerContainer()

Method Summary

Modifier and Type	Method	Description
boolean	addContinuousQueryDefinition(ContinuousQueryDefinition definition)
void	addListener(ContinuousQueryDefinition definition)	Adds a Continuous Query (CQ) definition to the (potentially running) container.
void	afterPropertiesSet()
protected void	applyContinuousQueryListenerContainerConfigurers(Iterable<ContinuousQueryListenerContainerConfigurer> configurers)	Applies an Iterable of ContinuousQueryListenerContainerConfigurer objects to customize the configuration of this ContinuousQueryListenerContainer.
protected void	applyContinuousQueryListenerContainerConfigurers(ContinuousQueryListenerContainerConfigurer... configurers)	Applies an array of ContinuousQueryListenerContainerConfigurer objects to customize the configuration of this ContinuousQueryListenerContainer.
protected Executor	createDefaultTaskExecutor()	Creates a default TaskExecutor.
void	destroy()
protected void	dispatchEvent(ContinuousQueryListener listener, CqEvent event)	Asynchronously dispatches the CQ event to the targeted ContinuousQueryListener.
protected BeanFactory	getBeanFactory()	Returns a reference to the configured BeanFactory.
protected String	getBeanName()	Returns the configured bean name of this container.
protected ContinuousQueryListenerContainerConfigurer	getCompositeContinuousQueryListenerContainerConfigurer()	Returns a Composite object containing the collection of ContinuousQueryListenerContainerConfigurer objects used to customize the configuration of this ContinuousQueryListenerContainer.
protected Queue<CqQuery>	getContinuousQueries()	Returns a reference to all the configured/registered Continuous Queries.
protected Set<ContinuousQueryDefinition>	getContinuousQueryDefinitions()	Returns a reference to all the configured ContinuousQueryDefinitions.
Optional<ErrorHandler>	getErrorHandler()	Returns an Optional reference to the configured ErrorHandler invoked when any unhandled Exceptions are thrown when invoking CQ listeners processing CQ events.
int	getPhase()	Gets the phase in which this CQ listener container will start in the Spring container.
String	getPoolName()	Returns the configured pool name.
PoolResolver	getPoolResolver()	Returns the configured PoolResolver used to resolve Pool object by name.
QueryService	getQueryService()	Returns a reference to the configured QueryService.
Executor	getTaskExecutor()	Returns a reference to the configured TaskExecutor.
boolean	isActive()	Determines whether this container is currently active, i.e., whether it has been setup and initialized but not shutdown yet.
boolean	isAutoStartup()	Determines whether this CQ listener container will automatically start on startup.
boolean	isRunning()	Determines whether the container has be started and is currently running.
protected CqListener	newCqListener(ContinuousQueryListener listener)
void	setAutoStartup(boolean autoStartup)	Sets whether the CQ listener container should automatically start on startup.
void	setBeanFactory(BeanFactory beanFactory)	Sets the BeanFactory containing this bean.
void	setBeanName(String name)	Set the name of the bean in the bean factory that created this bean.
void	setCache(RegionService cache)	Set the underlying RegionService (GemFire Cache) used for registering Queries.
void	setContinuousQueryListenerContainerConfigurers(List<ContinuousQueryListenerContainerConfigurer> configurers)	Null-safe operation setting an Iterable of ContinuousQueryListenerContainerConfigurer objects used to customize the configuration of this ContinuousQueryListenerContainer.
void	setContinuousQueryListenerContainerConfigurers(ContinuousQueryListenerContainerConfigurer... configurers)	Null-safe operation setting an array of ContinuousQueryListenerContainerConfigurer objects used to customize the configuration of this ContinuousQueryListenerContainer.
void	setErrorHandler(ErrorHandler errorHandler)	Set an ErrorHandler to be invoked in case of any uncaught Exceptions thrown while processing a CQ event.
void	setPhase(int phase)	Sets the phase in which this CQ listener container will start in the Spring container.
void	setPoolName(String poolName)	Set the name of the Pool used for performing the queries by this container.
void	setPoolResolver(PoolResolver poolResolver)	Configures the PoolResolver to resolve Pool objects by name from the Apache Geode cache.
void	setQueryListeners(Set<ContinuousQueryDefinition> queries)	Attaches the given query definitions.
void	setQueryService(QueryService queryService)	Set the GemFire QueryService used by this container to create ContinuousQueries (CQ).
void	setTaskExecutor(Executor taskExecutor)	Sets the Task Executor used for running the event listeners when messages are received.
void	start()
void	stop()
void	stop(Runnable callback)

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_THREAD_NAME_PREFIX

public static final String DEFAULT_THREAD_NAME_PREFIX

DEFAULT_POOL_RESOLVER

protected static final PoolResolver DEFAULT_POOL_RESOLVER

logger

protected final org.slf4j.Logger logger

Constructor Details

ContinuousQueryListenerContainer

public ContinuousQueryListenerContainer()

Method Details

afterPropertiesSet

public void afterPropertiesSet()

Specified by:

afterPropertiesSet in interface InitializingBean

applyContinuousQueryListenerContainerConfigurers

protected void applyContinuousQueryListenerContainerConfigurers(ContinuousQueryListenerContainerConfigurer... configurers)

Applies an array of ContinuousQueryListenerContainerConfigurer objects to customize the configuration of this ContinuousQueryListenerContainer.

Parameters:

configurers - array of ContinuousQueryListenerContainerConfigurer used to customize the configuration of this ContinuousQueryListenerContainer.

See Also:

• ContinuousQueryListenerContainerConfigurer

applyContinuousQueryListenerContainerConfigurers

protected void applyContinuousQueryListenerContainerConfigurers(Iterable<ContinuousQueryListenerContainerConfigurer> configurers)

Applies an Iterable of ContinuousQueryListenerContainerConfigurer objects to customize the configuration of this ContinuousQueryListenerContainer.

Parameters:

configurers - Iterable of ContinuousQueryListenerContainerConfigurer used to customize the configuration of this ContinuousQueryListenerContainer.

See Also:

• ContinuousQueryListenerContainerConfigurer

createDefaultTaskExecutor

protected Executor createDefaultTaskExecutor()

Creates a default TaskExecutor.

Called if no explicit TaskExecutor has been configured.

The default implementation builds a SimpleAsyncTaskExecutor with the specified bean name (or the class name, if no bean name is specified) as the Thread name prefix.

Returns:

an instance of the TaskExecutor used to process CQ events asynchronously.

See Also:

• SimpleAsyncTaskExecutor

isActive

public boolean isActive()

Determines whether this container is currently active, i.e., whether it has been setup and initialized but not shutdown yet.

Returns:

a boolean indicating whether the container is active.

setAutoStartup

public void setAutoStartup(boolean autoStartup)

Sets whether the CQ listener container should automatically start on startup.

Parameters:

autoStartup - a boolean value indicating whether this CQ listener container should automatically start.

isAutoStartup

public boolean isAutoStartup()

Determines whether this CQ listener container will automatically start on startup.

Specified by:

isAutoStartup in interface SmartLifecycle

Returns:

a boolean value indicating whether this CQ listener container automatically starts.

See Also:

• SmartLifecycle.isAutoStartup()

isRunning

public boolean isRunning()

Determines whether the container has be started and is currently running.

Specified by:

isRunning in interface Lifecycle

Returns:

a boolean value indicating whether the container has been started and is currently running.

setBeanFactory

public void setBeanFactory(BeanFactory beanFactory)
                    throws BeansException

Sets the BeanFactory containing this bean.

Specified by:

setBeanFactory in interface BeanFactoryAware

Parameters:

beanFactory - the Spring BeanFactory containing this bean.

Throws:

BeansException - if an initialization error occurs.

getBeanFactory

protected BeanFactory getBeanFactory()

Returns a reference to the configured BeanFactory.

Returns:

a reference to the configured BeanFactory.

See Also:

• BeanFactory

setBeanName

public void setBeanName(String name)

Set the name of the bean in the bean factory that created this bean.

Invoked after population of normal bean properties but before an init callback such as InitializingBean.afterPropertiesSet() or a custom init-method.

Specified by:

setBeanName in interface BeanNameAware

Parameters:

name - the name of the bean in the factory.

getBeanName

protected String getBeanName()

Returns the configured bean name of this container.

Returns:

the configured bean name of this container.

setCache

public void setCache(RegionService cache)

Set the underlying RegionService (GemFire Cache) used for registering Queries.

Parameters:

cache - the RegionService (GemFire Cache) used for registering Queries.

See Also:

• RegionService

getContinuousQueries

protected Queue<CqQuery> getContinuousQueries()

Returns a reference to all the configured/registered Continuous Queries.

Returns:

a reference to all the configured/registered Continuous Queries.

See Also:

• CqQuery
• Queue

getContinuousQueryDefinitions

protected Set<ContinuousQueryDefinition> getContinuousQueryDefinitions()

Returns a reference to all the configured ContinuousQueryDefinitions.

Returns:

a reference to all the configured ContinuousQueryDefinitions.

See Also:

• ContinuousQueryDefinition
• Set

setContinuousQueryListenerContainerConfigurers

public void setContinuousQueryListenerContainerConfigurers(ContinuousQueryListenerContainerConfigurer... configurers)

Null-safe operation setting an array of ContinuousQueryListenerContainerConfigurer objects used to customize the configuration of this ContinuousQueryListenerContainer.

Parameters:

configurers - array of ContinuousQueryListenerContainerConfigurer objects used to customize the configuration of this ContinuousQueryListenerContainer.

See Also:

• ContinuousQueryListenerContainerConfigurer
• setContinuousQueryListenerContainerConfigurers(List)

setContinuousQueryListenerContainerConfigurers

public void setContinuousQueryListenerContainerConfigurers(List<ContinuousQueryListenerContainerConfigurer> configurers)

Null-safe operation setting an Iterable of ContinuousQueryListenerContainerConfigurer objects used to customize the configuration of this ContinuousQueryListenerContainer.

Parameters:

configurers - Iterable of ContinuousQueryListenerContainerConfigurer objects used to customize the configuration of this ContinuousQueryListenerContainer.

See Also:

• ContinuousQueryListenerContainerConfigurer

getCompositeContinuousQueryListenerContainerConfigurer

protected ContinuousQueryListenerContainerConfigurer getCompositeContinuousQueryListenerContainerConfigurer()

Returns a Composite object containing the collection of ContinuousQueryListenerContainerConfigurer objects used to customize the configuration of this ContinuousQueryListenerContainer.

Returns:

a Composite object containing a collection of ContinuousQueryListenerContainerConfigurer objects used to customize the configuration of this ContinuousQueryListenerContainer.

See Also:

• ContinuousQueryListenerContainerConfigurer

setErrorHandler

public void setErrorHandler(ErrorHandler errorHandler)

Set an ErrorHandler to be invoked in case of any uncaught Exceptions thrown while processing a CQ event. By default there is no ErrorHandler configured so error-level logging is the only result.

Parameters:

errorHandler - ErrorHandler invoked when uncaught Exceptions are thrown while processing the CQ event.

See Also:

• ErrorHandler

getErrorHandler

public Optional<ErrorHandler> getErrorHandler()

Returns an Optional reference to the configured ErrorHandler invoked when any unhandled Exceptions are thrown when invoking CQ listeners processing CQ events.

Returns:

an Optional reference to the configured ErrorHandler.

See Also:

• ErrorHandler

setPhase

public void setPhase(int phase)

Sets the phase in which this CQ listener container will start in the Spring container.

Parameters:

phase - the phase value of this CQ listener container.

getPhase

public int getPhase()

Gets the phase in which this CQ listener container will start in the Spring container.

Specified by:

getPhase in interface Phased

Specified by:

getPhase in interface SmartLifecycle

Returns:

the phase value of this CQ listener container.

See Also:

• Phased.getPhase()

setPoolName

public void setPoolName(String poolName)

Set the name of the Pool used for performing the queries by this container.

Parameters:

poolName - the name of the pool to be used by the container

getPoolName

public String getPoolName()

Returns the configured pool name.

Returns:

the configured pool name.

setPoolResolver

public void setPoolResolver(PoolResolver poolResolver)

Configures the PoolResolver to resolve Pool objects by name from the Apache Geode cache.

Parameters:

poolResolver - the configured PoolResolver used to resolve Pool objects by name.

See Also:

• PoolResolver

getPoolResolver

public PoolResolver getPoolResolver()

Returns the configured PoolResolver used to resolve Pool object by name.

Returns:

the configured PoolResolver.

See Also:

• PoolResolver

setQueryListeners

public void setQueryListeners(Set<ContinuousQueryDefinition> queries)

Attaches the given query definitions.

Parameters:

queries - set of queries

setQueryService

public void setQueryService(QueryService queryService)

Set the GemFire QueryService used by this container to create ContinuousQueries (CQ).

Parameters:

queryService - the GemFire QueryService object used by the container to create ContinuousQueries (CQ).

See Also:

• QueryService

getQueryService

public QueryService getQueryService()

Returns a reference to the configured QueryService.

Returns:

a reference to the configured QueryService.

See Also:

• QueryService

setTaskExecutor

public void setTaskExecutor(Executor taskExecutor)

Sets the Task Executor used for running the event listeners when messages are received. If no task executor is set, an instance of SimpleAsyncTaskExecutor will be used by default. The task executor can be adjusted depending on the work done by the listeners and the number of messages coming in.

Parameters:

taskExecutor - The Task Executor used to run event listeners when query results messages are received.

See Also:

• Executor

getTaskExecutor

public Executor getTaskExecutor()

Returns a reference to the configured TaskExecutor.

Returns:

a reference to the configured TaskExecutor.

See Also:

• Executor

addListener

public void addListener(ContinuousQueryDefinition definition)

Adds a Continuous Query (CQ) definition to the (potentially running) container. If the container is running, the listener starts receiving (matching) messages as soon as possible.

Parameters:

definition - Continuous Query (CQ) definition to register.

See Also:

• ContinuousQueryDefinition

addContinuousQueryDefinition

public boolean addContinuousQueryDefinition(ContinuousQueryDefinition definition)

newCqListener

protected CqListener newCqListener(ContinuousQueryListener listener)

start

public void start()

Specified by:

start in interface Lifecycle

dispatchEvent

protected void dispatchEvent(ContinuousQueryListener listener,
 CqEvent event)

Asynchronously dispatches the CQ event to the targeted ContinuousQueryListener.

Parameters:

listener - ContinuousQueryListener which will process/handle the CQ event.

event - CQ event to process.

See Also:

• ContinuousQueryListener
• CqEvent

stop

public void stop(Runnable callback)

Specified by:

stop in interface SmartLifecycle

stop

public void stop()

Specified by:

stop in interface Lifecycle

destroy

public void destroy()

Specified by:

destroy in interface DisposableBean