com.arm.mbed.cloud.sdk.subscribe.SubscriptionManager Maven / Gradle / Ivy
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package com.arm.mbed.cloud.sdk.subscribe;
import java.util.List;
import com.arm.mbed.cloud.sdk.annotations.NonNull;
import com.arm.mbed.cloud.sdk.annotations.Nullable;
import com.arm.mbed.cloud.sdk.annotations.Preamble;
import com.arm.mbed.cloud.sdk.common.CallbackWithException;
import com.arm.mbed.cloud.sdk.common.MbedCloudException;
import com.arm.mbed.cloud.sdk.common.listing.FilterOptions;
import io.reactivex.BackpressureStrategy;
import io.reactivex.Scheduler;
@Preamble(description = "Manager of notification observers")
public interface SubscriptionManager {
/**
* Lists all the observer registered in the system.
*
* @return a list of observers.
*/
@Nullable
List> listAll();
/**
* List all the observer registered in the system corresponding to a specific subscription type.
*
* @param type
* type of subscription to consider.
* @return a list of observers.
*/
@Nullable
List> listAll(@NonNull SubscriptionType type);
/**
* States whether the system comprises registered observers.
*
* @return True if there are observers registered. False otherwise.
*/
boolean hasObservers();
/**
* States whether the system comprises registered observers for a specific subscription type.
*
* @param type
* type of subscription to consider.
*
* @return True if there are observers registered. False otherwise.
*/
boolean hasObservers(@NonNull SubscriptionType type);
/**
* States whether the system comprises a specific observer.
*
* @param type
* type of subscription to consider.
*
* @param observerId
* identifier of the observer to consider.
*
* @return True if the observer is registered. False otherwise.
*/
boolean hasObserver(@NonNull SubscriptionType type, String observerId);
/**
* States whether the system comprises a specific observer.
*
* @param observer
* the observer to consider.
*
* @return True if the observer is registered. False otherwise.
*/
boolean hasObserver(Observer observer);
/**
* Closes all communication channels (i.e. observers).
*
* Note: All observers will be completed but not unsubscribed. The notification channel will not be stopped.
*/
void completeAll();
/**
* Closes all communication channels (i.e. observers) of a certain type.
*
* Note: All observers will be completed but not unsubscribed. The notification channel will not be stopped.
*
* @param type
* type of subscription to consider.
*
*/
void completeAll(SubscriptionType type);
/**
* Unsubscribes all observers contained in the system.
*/
void unsubscribeAll();
/**
* Unsubscribes all observers of a certain type contained in the system.
*
* @param type
* type of subscription to consider.
*
*/
void unsubscribeAll(SubscriptionType type);
/**
* Closes a specific observer.
*
* The underlying channel will be completed.
*
* @param type
* subscription type.
* @param observerId
* identifier of the observer to complete.
*/
void complete(SubscriptionType type, String observerId);
/**
* Unsubscribes a specific observer.
*
* @param observer
* to unsubscribe.
*/
void unsubscribe(Observer observer);
/**
* Unsubscribes a specific observer.
*
* @param type
* subscription type.
* @param observerId
* identifier of the observer to unsubscribe.
*/
void unsubscribe(SubscriptionType type, String observerId);
/**
* Creates an observer and registers it.
*
* Similar to
* {@link #createObserver(SubscriptionType, FilterOptions, BackpressureStrategy, CallbackWithException, CallbackWithException)}
*
* @param type
* type of subscription to consider.
* @param filter
* filter to apply.
* @param strategy
* backpressure strategy to apply for underlying communication channel.
* @return newly created observer
*/
@Nullable
Observer createObserver(SubscriptionType type, FilterOptions filter, @NonNull BackpressureStrategy strategy);
/**
*
* Creates an observer and registers it.
*
* @param type
* type of subscription to consider.
* @param filter
* filter to apply.
* @param strategy
* backpressure strategy to apply for underlying communication channel.
* @param actionOnSubscription
* action to perform on subscription
* @param actionOnUnsubscription
* action to perform on unsubscription
* @return newly created observer
*/
@Nullable
Observer createObserver(SubscriptionType type, FilterOptions filter, @NonNull BackpressureStrategy strategy,
CallbackWithException actionOnSubscription,
CallbackWithException actionOnUnsubscription);
/**
* Notifies a raw value change to observers of a certain type.
*
* @param type
* subscription type.
* @param value
* raw value to send to the observers.
* @param
* Type of the notification message value.
* @throws MbedCloudException
* if a problem occurs during the process.
*/
void notify(SubscriptionType type, @NonNull T value) throws MbedCloudException;
/**
* Notifies a message to observers of a certain type.
*
* @param type
* subscription type.
* @param message
* message to send to the observers.
* @param
* Type of the notification message value.
* @throws MbedCloudException
* if a problem occurs during the process.
*/
void notify(SubscriptionType type, NotificationMessage message)
throws MbedCloudException;
/**
* Notifies a message to a specific observer.
*
* @param type
* subscription type.
* @param channelId
* identifier of the observer to notify.
* @param message
* message to send to the observer.
* @param
* Type of the notification message value.
* @throws MbedCloudException
* if a problem occurs during the process.
*/
void notify(SubscriptionType type, String channelId,
NotificationMessage message) throws MbedCloudException;
/**
* Gets the scheduler (similar to Executor) @see {@link Scheduler} the observation/subscription will be carried out
* on.
*
* @return the scheduler.
*/
Scheduler getObservedOnExecutor();
}