Package org.frankframework.extensions.mqtt

Class MqttSender

java.lang.Object

org.frankframework.extensions.mqtt.MqttFacade

org.frankframework.extensions.mqtt.MqttSender

All Implemented Interfaces:

FrankElement, HasApplicationContext, HasName, HasPhysicalDestination, IConfigurable, IScopeProvider, ISender, ISenderWithParameters, IWithParameters, NameAware, org.springframework.beans.factory.Aware, org.springframework.context.ApplicationContextAware

public class MqttSender
extends MqttFacade
implements ISenderWithParameters

MQTT listener which will connect to a broker and subscribe to a topic. Links to https://www.eclipse.org/paho/files/javadoc are opened in a new window/tab because the response from eclipse.org contains header X-Frame-Options:SAMEORIGIN which will make the browser refuse to open the link inside this frame.

Author:

Niels Meijer

Field Summary

Fields

Modifier and Type	Field	Description
protected ParameterList	paramList

Fields inherited from class org.frankframework.extensions.mqtt.MqttFacade

client

Constructor Summary

Constructors

Constructor	Description
MqttSender()

Method Summary

Modifier and Type	Method	Description
void	addParameter(IParameter p)
void	configure()	Configure this component.
ParameterList	getParameterList()
boolean	isSynchronous()	When true, the result of sendMessage is the reply of the request.
SenderResult	sendMessage(Message message, PipeLineSession session)	Send a message to some destination (as configured in the Sender object).
void	setTopic(String topic)	see MqttClient.subscribe(java.lang.String topicFilter)
void	start()	This method will be called to start the sender.
void	stop()	Stop/close the sender and deallocate resources.

Methods inherited from class org.frankframework.extensions.mqtt.MqttFacade

getLogPrefix, getPhysicalDestinationName, setCharset, setName, setQos, setResourceName, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.context.ApplicationContextAware

setApplicationContext

Methods inherited from interface org.frankframework.core.HasApplicationContext

getApplicationContext, getConfigurationClassLoader

Methods inherited from interface org.frankframework.core.HasName

getName

Methods inherited from interface org.frankframework.core.HasPhysicalDestination

getDomain

Methods inherited from interface org.frankframework.core.ISender

sendMessageOrThrow

Methods inherited from interface org.frankframework.core.ISenderWithParameters

consumesSessionVariable

Methods inherited from interface org.frankframework.core.NameAware

setName

Field Details

paramList

@Nonnull
protected ParameterList paramList

Constructor Details

MqttSender

public MqttSender()

Method Details

configure

public void configure()
               throws ConfigurationException

Description copied from interface: IConfigurable

Configure this component.

configure() is called once at startup of the framework in the configure method of the owner of this IConfigurable. Purpose of this method is to check whether the static configuration of the object is correct. As much as possible class-instantiating should take place in the configure(), to improve performance.

In the case of a container, this will propagate the configure signal to all components that apply.

Specified by:

configure in interface IConfigurable

Overrides:

configure in class MqttFacade

Throws:

ConfigurationException - in case it was not able to configure the component.

start

public void start()

Description copied from interface: ISender

This method will be called to start the sender. After this method is called the sendMessage method may be called. Purpose of this method is to reduce creating connections to databases etc. in the sendMessage() method.

Specified by:

start in interface ISender

stop

public void stop()

Description copied from interface: ISender

Stop/close the sender and deallocate resources.

Specified by:

stop in interface ISender

addParameter

public void addParameter(IParameter p)

Specified by:

addParameter in interface IWithParameters

getParameterList

@Nonnull
public ParameterList getParameterList()

Specified by:

getParameterList in interface IWithParameters

sendMessage

@Nonnull
public SenderResult sendMessage(@Nonnull
 Message message,
 @Nonnull
 PipeLineSession session)
                         throws SenderException,
TimeoutException

Description copied from interface: ISender

Send a message to some destination (as configured in the Sender object). This method may only be called after the configure() method is called.

The following table shows the difference between synchronous and a-synchronous senders:

	synchronous	a-synchronous
ISender.isSynchronous() returns	true	false
return value of sendMessage() is	the reply-message	the messageId of the message sent
the correlationID specified with sendMessage()	may be ignored	is sent with the message
a {link TimeOutException}	may be thrown if a timeout occurs waiting for a reply	should not be expected

Multiple objects may try to call this method at the same time, from different threads. Implementations of this method should therefore be thread-safe, or synchronized.

Specified by:

sendMessage in interface ISender

Throws:

SenderException

TimeoutException

setTopic

@Optional
public void setTopic(String topic)

see MqttClient.subscribe(java.lang.String topicFilter) Can be dynamically set using the "topic" parameter.

Overrides:

setTopic in class MqttFacade

isSynchronous

public boolean isSynchronous()

Description copied from interface: ISender

When true, the result of sendMessage is the reply of the request.

Specified by:

isSynchronous in interface ISender