Module dk.cloudcreate.essentials.reactive

Package dk.cloudcreate.essentials.reactive.command

Class AbstractCommandBus

java.lang.Object

dk.cloudcreate.essentials.reactive.command.AbstractCommandBus

All Implemented Interfaces:

CommandBus

Direct Known Subclasses:

LocalCommandBus

public abstract class AbstractCommandBus
extends Object
implements CommandBus

Base implementation of the CommandBus - provides default implementation for all operations except for CommandBus.sendAndDontWait(Object)/CommandBus.sendAndDontWait(Object, Duration)

Field Summary

Fields

Modifier and Type	Field	Description
protected Set<CommandHandler>	commandHandlers
protected ConcurrentMap<Class<?>,CommandHandler>	commandTypeToCommandHandlerCache	Key: Concrete Command type Value: CommandHandler that can handle the command type
protected List<CommandBusInterceptor>	interceptors
protected SendAndDontWaitErrorHandler	sendAndDontWaitErrorHandler

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractCommandBus(SendAndDontWaitErrorHandler sendAndDontWaitErrorHandler, List<CommandBusInterceptor> interceptors)
protected	AbstractCommandBus(List<CommandBusInterceptor> interceptors)

Method Summary

Modifier and Type	Method	Description
CommandBus	addCommandHandler(CommandHandler commandHandler)	Add a new command handler.
CommandBus	addInterceptor(CommandBusInterceptor interceptor)	Add a new interceptor
CommandHandler	findCommandHandlerCapableOfHandling(Object command)	Find a CommandHandler capable of handling the given command
List<CommandBusInterceptor>	getInterceptors()	Returns an immutable list of interceptors
boolean	hasCommandHandler(CommandHandler commandHandler)	Guard method to test if the CommandBus already contains the commandHandler
boolean	hasInterceptor(CommandBusInterceptor interceptor)	Guard method to test if the CommandBus already contains the interceptor
CommandBus	removeCommandHandler(CommandHandler commandHandler)	Remove a command handler.
CommandBus	removeInterceptor(CommandBusInterceptor interceptor)	Remove an interceptor
<R,C> R	send(C command)	The send command synchronously and process the command on the sending thread
<R,C> reactor.core.publisher.Mono<R>	sendAsync(C command)	The send command asynchronously and process the command on a Schedulers.boundedElastic() thread
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface dk.cloudcreate.essentials.reactive.command.CommandBus

sendAndDontWait, sendAndDontWait

Field Detail

interceptors

protected final List<CommandBusInterceptor> interceptors

commandHandlers

protected final Set<CommandHandler> commandHandlers

sendAndDontWaitErrorHandler

protected final SendAndDontWaitErrorHandler sendAndDontWaitErrorHandler

commandTypeToCommandHandlerCache

protected final ConcurrentMap<Class<?>,CommandHandler> commandTypeToCommandHandlerCache

Key: Concrete Command type
Value: CommandHandler that can handle the command type

Constructor Detail

AbstractCommandBus

protected AbstractCommandBus(List<CommandBusInterceptor> interceptors)

AbstractCommandBus

protected AbstractCommandBus(SendAndDontWaitErrorHandler sendAndDontWaitErrorHandler,
                             List<CommandBusInterceptor> interceptors)

Method Detail

getInterceptors

public List<CommandBusInterceptor> getInterceptors()

Description copied from interface: CommandBus

Returns an immutable list of interceptors

Specified by:

getInterceptors in interface CommandBus

Returns:

Returns an immutable list of interceptors

addInterceptor

public CommandBus addInterceptor(CommandBusInterceptor interceptor)

Description copied from interface: CommandBus

Add a new interceptor

Specified by:

addInterceptor in interface CommandBus

Parameters:

interceptor - the interceptor to add

Returns:

this bus instance

hasInterceptor

public boolean hasInterceptor(CommandBusInterceptor interceptor)

Description copied from interface: CommandBus

Guard method to test if the CommandBus already contains the interceptor

Specified by:

hasInterceptor in interface CommandBus

Parameters:

interceptor - the interceptor to check

Returns:

true if the CommandBus already contains the interceptor, otherwise false

removeInterceptor

public CommandBus removeInterceptor(CommandBusInterceptor interceptor)

Description copied from interface: CommandBus

Remove an interceptor

Specified by:

removeInterceptor in interface CommandBus

Parameters:

interceptor - the interceptor to remove

Returns:

this bus instance

addCommandHandler

public CommandBus addCommandHandler(CommandHandler commandHandler)

Description copied from interface: CommandBus

Add a new command handler.

Specified by:

addCommandHandler in interface CommandBus

Parameters:

commandHandler - the command handler to add

Returns:

this bus instance

removeCommandHandler

public CommandBus removeCommandHandler(CommandHandler commandHandler)

Description copied from interface: CommandBus

Remove a command handler.

Specified by:

removeCommandHandler in interface CommandBus

Parameters:

commandHandler - the command handler to remove

Returns:

this bus instance

send

public <R,C> R send(C command)

Description copied from interface: CommandBus

The send command synchronously and process the command on the sending thread

Specified by:

send in interface CommandBus

Type Parameters:

R - the return type

C - the command type

Parameters:

command - the command to send

Returns:

the result of the command processing (if any)

sendAsync

public <R,C> reactor.core.publisher.Mono<R> sendAsync(C command)

Description copied from interface: CommandBus

The send command asynchronously and process the command on a Schedulers.boundedElastic() thread

Specified by:

sendAsync in interface CommandBus

Type Parameters:

R - the return type

C - the command type

Parameters:

command - the command to send

Returns:

a Mono that will contain the result of the command processing (if any)

findCommandHandlerCapableOfHandling

public CommandHandler findCommandHandlerCapableOfHandling(Object command)

Description copied from interface: CommandBus

Find a CommandHandler capable of handling the given command

Specified by:

findCommandHandlerCapableOfHandling in interface CommandBus

Parameters:

command - the command to handle

Returns:

the single CommandHandler that's capable of handling the given command

hasCommandHandler

public boolean hasCommandHandler(CommandHandler commandHandler)

Description copied from interface: CommandBus

Guard method to test if the CommandBus already contains the commandHandler

Specified by:

hasCommandHandler in interface CommandBus

Parameters:

commandHandler - the commandHandler to check

Returns:

true if the CommandBus already contains the commandHandler, otherwise false

toString

public String toString()

Overrides:

toString in class Object