org.eclipse.scada.protocol.iec60870.apci

Interface MessageSource

All Known Implementing Classes:

DataModuleMessageSource

public interface MessageSource

Field Summary

Fields

Modifier and Type	Field and Description
static Object	NOTIFY_TOKEN The notify token which can be sent using the ChannelHandlerContext.write(Object) methods to notify the MessageChannel that the source has new content.

Method Summary

Methods

Modifier and Type	Method and Description
Object	poll() Poll the next message from the message source

Field Detail

NOTIFY_TOKEN

static final Object NOTIFY_TOKEN

The notify token which can be sent using the ChannelHandlerContext.write(Object) methods to notify the MessageChannel that the source has new content.

Note: This does not mean that the MessageChannel will immediately pick that content up.

Method Detail

poll

Object poll()

Poll the next message from the message source

Returns:

the next message to send, or null if there currently is no message