RecordingCommandBus (Axon Framework 3.1.1 API)

java.lang.Object
- org.axonframework.test.utils.RecordingCommandBus

All Implemented Interfaces:

CommandBus
```
public class RecordingCommandBus
extends Object
implements CommandBus
```
CommandBus implementation that does not perform any actions on subscriptions or dispatched commands, but records them instead. This implementation is not a stand-in replacement for a mock, but might prove useful in many simple cases.

Since:

1.1

Author:

Allard Buijze

Constructor Summary

Constructors
Constructor and Description

RecordingCommandBus()

Constructors
Constructor and Description
`RecordingCommandBus()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`clearCommands()` Clears all the commands recorded by this Command Bus.
`void`	`clearSubscriptions()` Clears all subscribed handlers on this command bus.
`<C> void`	`dispatch(CommandMessage<C> command)` Dispatch the given `command` to the CommandHandler subscribed to the given `command`'s name.
`<C,R> void`	`dispatch(CommandMessage<C> command, CommandCallback<? super C,R> callback)` Dispatch the given `command` to the CommandHandler subscribed to the given `command`'s name.
`List<CommandMessage<?>>`	`getDispatchedCommands()` Returns a list with all commands that have been dispatched by this command bus.
`Map<String,MessageHandler<? super CommandMessage<?>>>`	`getSubscriptions()` Returns a Map will all Command Names and their Command Handler that have been subscribed to this command bus.
`boolean`	`isSubscribed(MessageHandler<? super CommandMessage<?>> commandHandler)` Indicates whether the given `commandHandler` is subscribed to this command bus.
`<C> boolean`	`isSubscribed(String commandName, MessageHandler<? super CommandMessage<?>> commandHandler)` Indicates whether the given `commandHandler` is subscribed to commands of the given `commandType` on this command bus.
`void`	`setCallbackBehavior(CallbackBehavior callbackBehavior)` Sets the instance that defines the behavior of the Command Bus when a command is dispatched with a callback.
`Registration`	`subscribe(String commandName, MessageHandler<? super CommandMessage<?>> handler)` Subscribe the given `handler` to commands with the given `commandName`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - RecordingCommandBus
```
public RecordingCommandBus()
```
- Method Detail
  - dispatch
```
public <C> void dispatch(CommandMessage<C> command)
```
    Description copied from interface: CommandBus
    
    Dispatch the given command to the CommandHandler subscribed to the given command's name. No feedback is given about the status of the dispatching process. Implementations may return immediately after asserting a valid handler is registered for the given command.
    
    Specified by:
    
    dispatch in interface CommandBus
    
    Type Parameters:
    
    C - The payload type of the command to dispatch
    
    Parameters:
    
    command - The Command to dispatch
    
    See Also:
    
    GenericCommandMessage.asCommandMessage(Object)
  - dispatch
```
public <C,R> void dispatch(CommandMessage<C> command,
                           CommandCallback<? super C,R> callback)
```
    Description copied from interface: CommandBus
    
    Dispatch the given command to the CommandHandler subscribed to the given command's name. When the command is processed, one of the callback's methods is called, depending on the result of the processing.
    When the method returns, the only guarantee provided by the CommandBus implementation is that the command has been successfully received. Implementations are highly recommended to perform basic validation of the command before returning from this method call.
    Implementations must start a UnitOfWork when before dispatching the command, and either commit or rollback after a successful or failed execution, respectively.
    
    Specified by:
    
    dispatch in interface CommandBus
    
    Type Parameters:
    
    C - The payload type of the command to dispatch
    
    R - The type of the expected result
    
    Parameters:
    
    command - The Command to dispatch
    
    callback - The callback to invoke when command processing is complete
    
    See Also:
    
    GenericCommandMessage.asCommandMessage(Object)
  - subscribe
```
public Registration subscribe(String commandName,
                              MessageHandler<? super CommandMessage<?>> handler)
```
    Description copied from interface: CommandBus
    
    Subscribe the given handler to commands with the given commandName.
    If a subscription already exists for the given name, the behavior is undefined. Implementations may throw an Exception to refuse duplicate subscription or alternatively decide whether the existing or new handler gets the subscription.
    
    Specified by:
    
    subscribe in interface CommandBus
    
    Parameters:
    
    commandName - The name of the command to subscribe the handler to
    
    handler - The handler instance that handles the given type of command
    
    Returns:
    
    a handle to unsubscribe the handler. When unsubscribed it will no longer receive commands.
  - clearCommands
```
public void clearCommands()
```
    Clears all the commands recorded by this Command Bus.
  - clearSubscriptions
```
public void clearSubscriptions()
```
    Clears all subscribed handlers on this command bus.
  - isSubscribed
```
public boolean isSubscribed(MessageHandler<? super CommandMessage<?>> commandHandler)
```
    Indicates whether the given commandHandler is subscribed to this command bus.
    
    Parameters:
    
    commandHandler - The command handler to verify the subscription for
    
    Returns:
    
    true if the handler is subscribed, otherwise false.
  - isSubscribed
```
public <C> boolean isSubscribed(String commandName,
                                MessageHandler<? super CommandMessage<?>> commandHandler)
```
    Indicates whether the given commandHandler is subscribed to commands of the given commandType on this command bus.
    
    Type Parameters:
    
    C - The type of command to verify the subscription for
    
    Parameters:
    
    commandName - The name of the command to verify the subscription for
    
    commandHandler - The command handler to verify the subscription for
    
    Returns:
    
    true if the handler is subscribed, otherwise false.
  - getSubscriptions
```
public Map<String,MessageHandler<? super CommandMessage<?>>> getSubscriptions()
```
    Returns a Map will all Command Names and their Command Handler that have been subscribed to this command bus.
    
    Returns:
    
    a Map will all Command Names and their Command Handler
  - getDispatchedCommands
```
public List<CommandMessage<?>> getDispatchedCommands()
```
    Returns a list with all commands that have been dispatched by this command bus.
    
    Returns:
    
    a list with all commands that have been dispatched
  - setCallbackBehavior
```
public void setCallbackBehavior(CallbackBehavior callbackBehavior)
```
    Sets the instance that defines the behavior of the Command Bus when a command is dispatched with a callback.
    
    Parameters:
    
    callbackBehavior - The instance deciding to how the callback should be invoked.

Class RecordingCommandBus

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

RecordingCommandBus

Method Detail

dispatch

dispatch

subscribe

clearCommands

clearSubscriptions

isSubscribed

isSubscribed

getSubscriptions

getDispatchedCommands

setCallbackBehavior