de.otto.synapse.channel

Class InMemoryChannel

java.lang.Object

de.otto.synapse.endpoint.MessageEndpoint

de.otto.synapse.endpoint.receiver.MessageReceiverEndpoint

de.otto.synapse.endpoint.receiver.MessageLogReceiverEndpoint

de.otto.synapse.channel.InMemoryChannel

public class InMemoryChannel
extends MessageLogReceiverEndpoint

Constructor Summary

Constructors

Constructor and Description
InMemoryChannel(java.lang.String channelName)
InMemoryChannel(java.lang.String channelName, com.fasterxml.jackson.databind.ObjectMapper objectMapper)

Method Summary

Modifier and Type	Method and Description
ChannelPosition	consume(ChannelPosition startFrom, java.util.function.Predicate<Message<?>> stopCondition) Takes zero or more messages from the channel, calls MessageEndpoint.intercept(Message) for every message, and notifies the registered consumers with the intercepted message, or drops the message, if intercept returns null.
void	send(Message<java.lang.String> event)
void	stop()

Methods inherited from class de.otto.synapse.endpoint.receiver.MessageReceiverEndpoint

getMessageDispatcher, register

Methods inherited from class de.otto.synapse.endpoint.MessageEndpoint

getChannelName, intercept, register

Methods inherited from class java.lang.Object

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

Constructor Detail

InMemoryChannel

public InMemoryChannel(java.lang.String channelName)

InMemoryChannel

public InMemoryChannel(java.lang.String channelName,
                       com.fasterxml.jackson.databind.ObjectMapper objectMapper)

Method Detail

send

public void send(Message<java.lang.String> event)

consume

@Nonnull
public ChannelPosition consume(@Nonnull
                                        ChannelPosition startFrom,
                                        @Nonnull
                                        java.util.function.Predicate<Message<?>> stopCondition)

Description copied from class: MessageLogReceiverEndpoint

Takes zero or more messages from the channel, calls MessageEndpoint.intercept(Message) for every message, and notifies the registered consumers with the intercepted message, or drops the message, if intercept returns null.

Consumption starts with the first message after startFrom and finishes when either the stopCondition is met, or the application is shutting down.

The returned ChannelPosition is the position of the last message that was processed by the MessageLogReceiverEndpoint - whether it was dropped or consumed.

The registered consumers are used as a callback for consumed messages. A MessageDispatcher can be used as a consumer, if multiple consumers, or consumers with message payloads other than String are required.

Specified by:

consume in class MessageLogReceiverEndpoint

Parameters:

startFrom - the start position used to proceed message consumption

stopCondition - the predicate used to check if consumption should stop.

Returns:

ChannelResponse

stop

public void stop()

Specified by:

stop in class MessageLogReceiverEndpoint