Package net.solarnetwork.node.runtime

Class EventMessageBridge

java.lang.Object

net.solarnetwork.node.runtime.EventMessageBridge

All Implemented Interfaces:

org.osgi.service.event.EventHandler

public class EventMessageBridge
extends Object
implements org.osgi.service.event.EventHandler

Bridge between OSGi EventAdmin events and a Spring Messaging.

Version:

2.0

Author:

matt

Field Summary

Fields

Modifier and Type	Field	Description
static final String	MESSAGE_TOPIC_PREFIX	The prefix automatically added to every message topic value.
static final String	NODE_EVENT_PREFIX	A prefix automatically stripped from event topic values.
static final String	PUBLIC_MESSAGE_TOPIC_PREFIX	The prefix automatically added to every public message topic value.

Constructor Summary

Constructors

Constructor	Description
EventMessageBridge(net.solarnetwork.service.OptionalService<org.springframework.messaging.simp.SimpMessageSendingOperations> messageSendingOps)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	handleEvent(org.osgi.service.event.Event event)
protected void	postMessage(String dest, Object body)	Post a message without any headers, converting it first.
protected void	postMessage(String dest, Object body, Map<String,Object> headers, boolean convert)	Post a message.
void	setPublicTopicMapping(Map<String,String> publicTopicMapping)	Set the mapping of event topic values to corresponding public message topic values.
void	setTopicMapping(Map<String,String> topicMapping)	Set a mapping of event topic values to corresponding message topic values.

Methods inherited from class java.lang.Object

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

Field Details

NODE_EVENT_PREFIX

public static final String NODE_EVENT_PREFIX

A prefix automatically stripped from event topic values.

See Also:

• Constant Field Values

MESSAGE_TOPIC_PREFIX

public static final String MESSAGE_TOPIC_PREFIX

The prefix automatically added to every message topic value.

See Also:

• Constant Field Values

PUBLIC_MESSAGE_TOPIC_PREFIX

public static final String PUBLIC_MESSAGE_TOPIC_PREFIX

The prefix automatically added to every public message topic value.

Since:

1.1

See Also:

• Constant Field Values

Constructor Details

EventMessageBridge

public EventMessageBridge(net.solarnetwork.service.OptionalService<org.springframework.messaging.simp.SimpMessageSendingOperations> messageSendingOps)

Constructor.

Parameters:

messageSendingOps - the optional message sending service to use

Method Details

handleEvent

public void handleEvent(org.osgi.service.event.Event event)

Specified by:

handleEvent in interface org.osgi.service.event.EventHandler

postMessage

protected void postMessage(String dest,
 Object body)

Post a message without any headers, converting it first.

Will silently ignore the event if no MessageSendingOperations is available.

Parameters:

dest - The destination to post to.

body - The message body to post. This will be wrapped in a Result object if it is not one already.

See Also:

• postMessage(String, Object, Map, boolean)

postMessage

protected void postMessage(String dest,
 Object body,
 Map<String,Object> headers,
 boolean convert)

Post a message. Will silently ignore the event if no MessageSendingOperations is available.

If convert is true the message will be sent via the MessageSendingOperations.convertAndSend(Object, Object, Map) method. Otherwise the MessageSendingOperations.send(Object, Message) method will be used to send the body as-is.

Parameters:

dest - The destination to post to.

body - The message body to post. If convert is true then this will be wrapped in a Result object if it is not one already.

headers - an optional set of message headers to include

convert - true to convert the message before sending, false to send without any conversion

Since:

1.1

setTopicMapping

public void setTopicMapping(Map<String,String> topicMapping)

Set a mapping of event topic values to corresponding message topic values.

The event topic values are first stripped of any NODE_EVENT_PREFIX, and the resulting value used as a key to lookup a message topic value to use from this map. The message topics can use template variables as defined in StringUtils.expandTemplateString(String, Map); all the event properties are made available to the expansion.

Parameters:

topicMapping - the topicMapping to set

setPublicTopicMapping

public void setPublicTopicMapping(Map<String,String> publicTopicMapping)

Set the mapping of event topic values to corresponding public message topic values.

The same messaging handling rules as documented in setTopicMapping(Map) apply here, except that the resulting topic will have the PUBLIC_MESSAGE_TOPIC_PREFIX instead of the MESSAGE_TOPIC_PREFIX.

Parameters:

publicTopicMapping - the public topic mapping to set

Since:

1.1

See Also:

• setTopicMapping(Map)