//
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// MQTTSessionSynchron.h
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// MQTTClient.framework
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//
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/**
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Synchronous API
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@author Christoph Krey c@ckrey.de
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@copyright Copyright © 2013-2017, Christoph Krey. All rights reserved.
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*/
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#import <Foundation/Foundation.h>
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#import "MQTTSession.h"
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@interface MQTTSession(Synchron)
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/** connects to the specified MQTT server synchronously
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@param timeout defines the maximum time to wait. Defaults to 0 for no timeout.
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@return true if the connection was established
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@code
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#import "MQTTClient.h"
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MQTTSession *session = [[MQTTSession alloc] init];
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[session connectAndWaitTimeout:30];
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@endcode
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*/
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- (BOOL)connectAndWaitTimeout:(NSTimeInterval)timeout;
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/** subscribes to a topic at a specific QoS level synchronously
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@param topic the Topic Filter to subscribe to.
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@param qosLevel specifies the QoS Level of the subscription.
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qosLevel can be 0, 1, or 2.
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@param timeout defines the maximum time to wait
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@return TRUE if successfully subscribed
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@code
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#import "MQTTClient.h"
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MQTTSession *session = [[MQTTSession alloc] init];
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[session connectAndWaitTimeout:30];
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[session subscribeAndWaitToTopic:@"example/#" atLevel:2 timeout:10];
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@endcode
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*/
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- (BOOL)subscribeAndWaitToTopic:(NSString *)topic
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atLevel:(MQTTQosLevel)qosLevel
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timeout:(NSTimeInterval)timeout;
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/** subscribes a number of topics
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@param topics an NSDictionary<NSString *, NSNumber *> containing the Topic Filters to subscribe to as keys and
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the corresponding QoS as NSNumber values
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@param timeout defines the maximum time to wait
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@return TRUE if the subscribe was succesfull
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@code
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#import "MQTTClient.h"
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MQTTSession *session = [[MQTTSession alloc] init];
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[session connectAndWaitTimeout:30];
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[session subscribeAndWaitToTopics:@{
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@"example/#": @(0),
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@"example/status": @(2),
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@"other/#": @(1)
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}
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timeout:10];
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@endcode
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*/
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- (BOOL)subscribeAndWaitToTopics:(NSDictionary<NSString *, NSNumber *> *)topics
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timeout:(NSTimeInterval)timeout;
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/** unsubscribes from a topic synchronously
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@param topic the Topic Filter to unsubscribe from.
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@param timeout defines the maximum time to wait
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@return TRUE if sucessfully unsubscribed
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@code
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#import "MQTTClient.h"
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MQTTSession *session = [[MQTTSession alloc] init];
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[session connectAndWaitTimeout:30];
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...
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[session unsubscribeAndWaitTopic:@"example/#" timeout:10];
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@endcode
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*/
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- (BOOL)unsubscribeAndWaitTopic:(NSString *)topic
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timeout:(NSTimeInterval)timeout;
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/** unsubscribes from a number of topics synchronously
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@param topics an NSArray<NSString *> of topics to unsubscribe from
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@param timeout defines the maximum time to wait
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@return TRUE if the unsubscribe was successful
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@code
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#import "MQTTClient.h"
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MQTTSession *session = [[MQTTSession alloc] init];
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[session connectAndWaitTimeout:30];
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...
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[session unsubscribeAndWaitTopics:@[
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@"example/#",
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@"example/status",
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@"other/#"
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]
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timeout:10];
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@endcode
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*/
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- (BOOL)unsubscribeAndWaitTopics:(NSArray<NSString *> *)topics
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timeout:(NSTimeInterval)timeout;
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/** publishes synchronously data on a given topic at a specified QoS level and retain flag
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@param data the data to be sent. length may range from 0 to 268,435,455 - 4 - _lengthof-topic_ bytes. Defaults to length 0.
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@param topic the Topic to identify the data
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@param retainFlag if YES, data is stored on the MQTT broker until overwritten by the next publish with retainFlag = YES
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@param qos specifies the Quality of Service for the publish
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qos can be 0, 1, or 2.
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@param timeout defines the maximum time to wait
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@returns TRUE if the publish was successful
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@code
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#import "MQTTClient.h"
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MQTTSession *session = [[MQTTSession alloc] init];
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[session connectAndWaitTimeout:30];
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[session publishAndWaitData:[@"Sample Data" dataUsingEncoding:NSUTF8StringEncoding]
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topic:@"example/data"
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retain:YES
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qos:1
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timeout:10];
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@endcode
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*/
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- (BOOL)publishAndWaitData:(NSData *)data
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onTopic:(NSString *)topic
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retain:(BOOL)retainFlag
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qos:(MQTTQosLevel)qos
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timeout:(NSTimeInterval)timeout;
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/** closes an MQTTSession gracefully synchronously
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@param timeout defines the maximum time to wait
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If the connection was successfully established before, a DISCONNECT is sent.
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@code
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#import "MQTTClient.h"
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MQTTSession *session = [[MQTTSession alloc] init];
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[session connectAndWaitTimeout:30];
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...
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[session closeAndWait:10];
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@endcode
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*/
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- (void)closeAndWait:(NSTimeInterval)timeout;
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@end
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