ej.aws.iot

Class AwsIotClient

java.lang.Object

ej.aws.iot.AwsIotClient

public class AwsIotClient
extends java.lang.Object

AWS IoT client, based on MicroPaho MQTT Implementation.

Constructor Summary

Constructors

Constructor and Description
AwsIotClient(AwsIotClientOptions options) Constructor client.
AwsIotClient(AwsIotClientOptions options, AwsIotConnectionListener connectionCallback) Constructor client.

Method Summary

Modifier and Type	Method and Description
void	close() Close this client.
void	connect() Connect to AWS IoT service using the client options.
protected void	connectionLost(java.lang.Throwable cause) Dispatch connection lost event if an AwsIotConnectionListener was registered.
void	deleteShadow() Delete the classic shadow of thing with QOS 0.
void	deleteShadow(int qos) Delete the classic shadow of thing.
void	deleteShadow(java.lang.String shadowName) Delete the named shadow of thing with QOS 0.
void	deleteShadow(java.lang.String shadowName, int qos) Delete the named shadow of thing.
void	disconnect() Disconnect this client from the underlying communication layer.
protected void	dispatch(AwsIotMessage message) dispatch message to corresponding subscriber if any otherwise log a warning if warning logs are activated
AwsIotClientOptions	getClientOptions() Gets the client options.
void	getShadow() Gets shadow with default QOS 0.
void	getShadow(int qos) Gets shadow.
void	getShadow(java.lang.String shadowName) Gets the named shadow with default QOS 0.
void	getShadow(java.lang.String shadowName, int qos) Gets the named shadow.
boolean	isConnected() Returns the state of the connection.
void	publish(AwsIotMessage message) Publish a message to AWS IoT MQTT broker.
void	publish(java.lang.String topic, byte[] data) Publishes a message on a topic with default QOS 0
void	publish(java.lang.String topic, byte[] data, int qos) Publishes a message on a topic.
void	publish(java.lang.String topic, byte[] data, int qos, boolean retained) Publishes a message on a topic.
void	subscribe(java.lang.String topic, AwsIotMessageCallback subscriber) Adds a topic listener on a topic.
void	subscribe(java.lang.String topic, AwsIotMessageCallback subscriber, int qos) Adds a topic listener on a topic.
void	subscribeToShadow(ShadowAction action, ShadowResult result, AwsIotMessageCallback callback) Subscribe to a shadow action (GET, UPDATE, DELETE) result ACCEPTED, REJECTED and (DELTA, DOCUMENT for update only).
void	subscribeToShadow(ShadowAction action, ShadowResult result, AwsIotMessageCallback callback, int qos) Subscribe to a shadow action (GET, UPDATE, DELETE) result ACCEPTED, REJECTED and (DELTA, DOCUMENT for update only).
void	subscribeToShadow(java.lang.String shadowName, ShadowAction action, ShadowResult result, AwsIotMessageCallback callback) Subscribe to a shadow action (GET, UPDATE, DELETE) result ACCEPTED, REJECTED and (DELTA, DOCUMENT for update only).
void	subscribeToShadow(java.lang.String shadowName, ShadowAction action, ShadowResult result, AwsIotMessageCallback callback, int qos) Subscribe to a shadow action (GET, UPDATE, DELETE) result ACCEPTED, REJECTED and (DELTA, DOCUMENT for update only).
void	unsubscribe(java.lang.String topic) Unsubscribe from a topic.
void	unsubscribeFromShadow(ShadowAction action, ShadowResult result) Unsubscribe from a shadow action.
void	unsubscribeFromShadow(java.lang.String shadowName, ShadowAction action, ShadowResult result) Unsubscribe from a shadow action.
void	updateShadow(byte[] message) Creates a no-named shadow if it doesn't exist, or updates the contents of an existing shadow with the state information provided in the message body.
void	updateShadow(byte[] message, int qos) Creates a no-named shadow if it doesn't exist, or updates the contents of an existing shadow with the state information provided in the message body.
void	updateShadow(java.lang.String shadowName, byte[] message) Creates a shadow if it doesn't exist, or updates the contents of an existing shadow with the state information provided in the message body.
void	updateShadow(java.lang.String shadowName, byte[] message, int qos) updateShadow : Creates a shadow if it doesn't exist, or updates the contents of an existing shadow with the state information provided in the message body.

Methods inherited from class java.lang.Object

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

Constructor Detail

AwsIotClient

public AwsIotClient(AwsIotClientOptions options)

Constructor client.

Parameters:

options - the connection option. use AwsIotClientOptions.Builder to create an instance of AwsIotClientOptions

AwsIotClient

public AwsIotClient(AwsIotClientOptions options,
                    AwsIotConnectionListener connectionCallback)

Constructor client.

Parameters:

options - the connection option

connectionCallback - connection callback to monitor connection lost events

Method Detail

connect

public void connect()
             throws AwsIotException

Connect to AWS IoT service using the client options.

Throws:

AwsIotException - if an error occurred during connection.

isConnected

public boolean isConnected()

Returns the state of the connection.

Returns:

true if connected, false otherwise

disconnect

public void disconnect()
                throws AwsIotException

Disconnect this client from the underlying communication layer.

Throws:

AwsIotException - when not connected

close

public void close()
           throws AwsIotException

Close this client. This close the underlying MQTT client, clean the subscribers list and shutdown the service executor which is responsible of executing message callback on a separated thread.

Throws:

AwsIotException - if the client is not disconnected.

subscribe

public void subscribe(java.lang.String topic,
                      AwsIotMessageCallback subscriber)
               throws AwsIotException

Adds a topic listener on a topic. Only one listener per topic can exist, if a listener is added on a topic that already has a listener, it will be replaced. QOS 0 is used

Parameters:

topic - the topic to add the listener on, one listener is allowed per topic

subscriber - the subscriber that will process the received data

Throws:

AwsIotException - when not connected or on communication error

subscribe

public void subscribe(java.lang.String topic,
                      AwsIotMessageCallback subscriber,
                      int qos)
               throws AwsIotException

Adds a topic listener on a topic. Only one listener per topic can exist, if a listener is added on a topic that already has a listener, it will be replaced.

Parameters:

topic - the topic to add the listener on, one listener is allowed per topic

subscriber - the subscriber that will process the received data

qos - MQTT quality of service

Throws:

AwsIotException - when not connected or on communication error

unsubscribe

public void unsubscribe(java.lang.String topic)
                 throws AwsIotException

Unsubscribe from a topic.

Parameters:

topic - the topic you want to stop listening to

Throws:

AwsIotException - when not connected or on communication error

publish

public void publish(AwsIotMessage message)
             throws AwsIotException

Publish a message to AWS IoT MQTT broker.

Parameters:

message - AwsIotMessage

Throws:

AwsIotException - on error

publish

public void publish(java.lang.String topic,
                    byte[] data)
             throws AwsIotException

Publishes a message on a topic with default QOS 0

Parameters:

topic - the topic you want to publish on

data - the data you want to publish

Throws:

AwsIotException - when not connected or on communication error

publish

public void publish(java.lang.String topic,
                    byte[] data,
                    int qos)
             throws AwsIotException

Publishes a message on a topic. the retained flag is set to false when using this method.

Parameters:

topic - the topic you want to publish on

data - the data you want to publish

qos - MQTT quality of service

Throws:

AwsIotException - when not connected or on communication error

publish

public void publish(java.lang.String topic,
                    byte[] data,
                    int qos,
                    boolean retained)
             throws AwsIotException

Publishes a message on a topic.

Parameters:

topic - the topic you want to publish on

data - the data you want to publish

qos - MQTT quality of service

retained - set retained flag on the message.

Throws:

AwsIotException - when not connected or on communication error

getShadow

public void getShadow()
               throws AwsIotException

Gets shadow with default QOS 0. Important Before calling this method, subscribe to the it's relevant shadow response to receive the response. If you do not subscribe to the shadow response before you perform this request, you will not receive the results.

Throws:

AwsIotException - when not connected or on communication error

See Also:

subscribeToShadow(ShadowAction, ShadowResult, AwsIotMessageCallback)

getShadow

public void getShadow(int qos)
               throws AwsIotException

Gets shadow. Important Before calling this method, subscribe to the it's relevant shadow response to receive the response. If you do not subscribe to the shadow response before you perform this request, you will not receive the results.

Parameters:

qos - MQTT quality of service

Throws:

AwsIotException - when not connected or on communication error

See Also:

subscribeToShadow(ShadowAction, ShadowResult, AwsIotMessageCallback)

getShadow

public void getShadow(java.lang.String shadowName)
               throws AwsIotException

Gets the named shadow with default QOS 0. Important Before calling this method, subscribe to the it's relevant shadow response to receive the response. If you do not subscribe to the shadow response before you perform this request, you will not receive the results.

Parameters:

shadowName - the shadow name

Throws:

AwsIotException - when not connected or on communication error

See Also:

subscribeToShadow(ShadowAction, ShadowResult, AwsIotMessageCallback)

getShadow

public void getShadow(java.lang.String shadowName,
                      int qos)
               throws AwsIotException

Gets the named shadow. Important Before calling this method, subscribe to the it's relevant shadow response to receive the response. If you do not subscribe to the shadow response before you perform this request, you will not receive the results.

Parameters:

shadowName - the shadow name

qos - MQTT quality of service

Throws:

AwsIotException - when not connected or on communication error

See Also:

subscribeToShadow(ShadowAction, ShadowResult, AwsIotMessageCallback)

updateShadow

public void updateShadow(byte[] message)
                  throws AwsIotException

Creates a no-named shadow if it doesn't exist, or updates the contents of an existing shadow with the state information provided in the message body. Important Before calling this method, subscribe to the it's relevant shadow response to receive the response. If you do not subscribe to the shadow response before you perform this request, you will not receive the results.

Parameters:

message - the message (body of request)

Throws:

AwsIotException - when not connected or on communication error

See Also:

subscribeToShadow(ShadowAction, ShadowResult, AwsIotMessageCallback)

updateShadow

public void updateShadow(byte[] message,
                         int qos)
                  throws AwsIotException

Creates a no-named shadow if it doesn't exist, or updates the contents of an existing shadow with the state information provided in the message body. Important Before calling this method, subscribe to the it's relevant shadow response to receive the response. If you do not subscribe to the shadow response before you perform this request, you will not receive the results.

Parameters:

message - the message (body of request)

qos - MQTT quality of service

Throws:

AwsIotException - when not connected or on communication error

See Also:

subscribeToShadow(ShadowAction, ShadowResult, AwsIotMessageCallback)

updateShadow

public void updateShadow(java.lang.String shadowName,
                         byte[] message)
                  throws AwsIotException

Creates a shadow if it doesn't exist, or updates the contents of an existing shadow with the state information provided in the message body. Important Before calling this method, subscribe to the it's relevant shadow response to receive the response. If you do not subscribe to the shadow response before you perform this request, you will not receive the results.

Parameters:

shadowName - the shadow name

message - the message

Throws:

AwsIotException - when not connected or on communication error

See Also:

subscribeToShadow(ShadowAction, ShadowResult, AwsIotMessageCallback)

updateShadow

public void updateShadow(java.lang.String shadowName,
                         byte[] message,
                         int qos)
                  throws AwsIotException

updateShadow : Creates a shadow if it doesn't exist, or updates the contents of an existing shadow with the state information provided in the message body. Important Before calling this method, subscribe to the it's relevant shadow response to receive the response. If you do not subscribe to the shadow response before you perform this request, you will not receive the results.

Parameters:

shadowName - the shadow name

message - the message

qos - MQTT quality of service

Throws:

AwsIotException - when not connected or on communication error

See Also:

subscribeToShadow(ShadowAction, ShadowResult, AwsIotMessageCallback)

deleteShadow

public void deleteShadow()
                  throws AwsIotException

Delete the classic shadow of thing with QOS 0. Important Before calling this method, subscribe to the it's relevant shadow response to receive the response. If you do not subscribe to the shadow response before you perform this request, you will not receive the results.

Throws:

AwsIotException - when not connected or on communication error

See Also:

subscribeToShadow(ShadowAction, ShadowResult, AwsIotMessageCallback)

deleteShadow

public void deleteShadow(int qos)
                  throws AwsIotException

Delete the classic shadow of thing. Important Before calling this method, subscribe to the it's relevant shadow response to receive the response. If you do not subscribe to the shadow response before you perform this request, you will not receive the results.

Parameters:

qos - MQTT quality of service

Throws:

AwsIotException - when not connected or on communication error

See Also:

subscribeToShadow(ShadowAction, ShadowResult, AwsIotMessageCallback)

deleteShadow

public void deleteShadow(java.lang.String shadowName)
                  throws AwsIotException

Delete the named shadow of thing with QOS 0. Important Before calling this method, subscribe to the it's relevant shadow response to receive the response. If you do not subscribe to the shadow response before you perform this request, you will not receive the results.

Parameters:

shadowName - the shadow client

Throws:

AwsIotException - when not connected or on communication error

See Also:

subscribeToShadow(ShadowAction, ShadowResult, AwsIotMessageCallback)

deleteShadow

public void deleteShadow(java.lang.String shadowName,
                         int qos)
                  throws AwsIotException

Delete the named shadow of thing. Important Before calling this method, subscribe to the it's relevant shadow response to receive the response. If you do not subscribe to the shadow response before you perform this request, you will not receive the results.

Parameters:

shadowName - the shadow client

qos - MQTT quality of service

Throws:

AwsIotException - when not connected or on communication error

See Also:

subscribeToShadow(ShadowAction, ShadowResult, AwsIotMessageCallback)

subscribeToShadow

public void subscribeToShadow(ShadowAction action,
                              ShadowResult result,
                              AwsIotMessageCallback callback)
                       throws AwsIotException

Subscribe to a shadow action (GET, UPDATE, DELETE) result ACCEPTED, REJECTED and (DELTA, DOCUMENT for update only). This method use QOS 0. to specify the qos use subscribeToShadow(String, ShadowAction, ShadowResult, AwsIotMessageCallback, int)

Parameters:

action - the shadow action see ShadowAction for possible values

result - the result to listen too ACCEPTED, REJECTED and (DELTA, DOCUMENT for update only). Use ShadowResult for possible values

callback - the action callback will be executed when a message is received.

Throws:

AwsIotException - on error.

subscribeToShadow

public void subscribeToShadow(java.lang.String shadowName,
                              ShadowAction action,
                              ShadowResult result,
                              AwsIotMessageCallback callback)
                       throws AwsIotException

Subscribe to a shadow action (GET, UPDATE, DELETE) result ACCEPTED, REJECTED and (DELTA, DOCUMENT for update only). This method use QOS 0. to specify the qos use subscribeToShadow(String, ShadowAction, ShadowResult, AwsIotMessageCallback, int)

Parameters:

shadowName - the name of shadow

action - the shadow action see ShadowAction for possible values

result - the result to listen too ACCEPTED, REJECTED and (DELTA, DOCUMENT for update only). Use ShadowResult for possible values

callback - the action callback will be executed when a message is received.

Throws:

AwsIotException - on error.

subscribeToShadow

public void subscribeToShadow(ShadowAction action,
                              ShadowResult result,
                              AwsIotMessageCallback callback,
                              int qos)
                       throws AwsIotException

Subscribe to a shadow action (GET, UPDATE, DELETE) result ACCEPTED, REJECTED and (DELTA, DOCUMENT for update only).

Parameters:

action - the shadow action see ShadowAction for possible values

result - the result to listen too ACCEPTED, REJECTED and (DELTA, DOCUMENT for update only). Use ShadowResult for possible values

callback - the action callback will be executed when a message is received.

qos - the MQTT quality of service.

Throws:

AwsIotException - on error.

subscribeToShadow

public void subscribeToShadow(java.lang.String shadowName,
                              ShadowAction action,
                              ShadowResult result,
                              AwsIotMessageCallback callback,
                              int qos)
                       throws AwsIotException

Subscribe to a shadow action (GET, UPDATE, DELETE) result ACCEPTED, REJECTED and (DELTA, DOCUMENT for update only).

Parameters:

shadowName - the name of shadow

action - the shadow action see ShadowAction for possible values

result - the result to listen too ACCEPTED, REJECTED and (DELTA, DOCUMENT for update only). Use ShadowResult for possible values

callback - the action callback will be executed when a message is received.

qos - the MQTT quality of service.

Throws:

AwsIotException - on error.

unsubscribeFromShadow

public void unsubscribeFromShadow(ShadowAction action,
                                  ShadowResult result)
                           throws AwsIotException

Unsubscribe from a shadow action.

Parameters:

action - the shadow action see ShadowAction for possible values

result - the result to listen too ACCEPTED, REJECTED and (DELTA, DOCUMENT for update only). Use ShadowResult for possible values

Throws:

AwsIotException - on error

unsubscribeFromShadow

public void unsubscribeFromShadow(java.lang.String shadowName,
                                  ShadowAction action,
                                  ShadowResult result)
                           throws AwsIotException

Unsubscribe from a shadow action.

Parameters:

shadowName - shadow name

action - the shadow action see ShadowAction for possible values

result - the result to listen too ACCEPTED, REJECTED and (DELTA, DOCUMENT for update only). Use ShadowResult for possible values

Throws:

AwsIotException - on error

getClientOptions

public AwsIotClientOptions getClientOptions()

Gets the client options.

Returns:

the client options.

dispatch

protected void dispatch(AwsIotMessage message)

dispatch message to corresponding subscriber if any otherwise log a warning if warning logs are activated

Parameters:

message - received message

connectionLost

protected void connectionLost(java.lang.Throwable cause)

Dispatch connection lost event if an AwsIotConnectionListener was registered.

Parameters:

cause - connection lost cause