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Classes common for multiple Ant Media projects
package io.antmedia.datastore.db;
import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Iterator;
import io.antmedia.datastore.db.types.Broadcast;
import io.antmedia.datastore.db.types.ConferenceRoom;
import io.antmedia.datastore.db.types.ConnectionEvent;
import io.antmedia.datastore.db.types.Endpoint;
import io.antmedia.datastore.db.types.P2PConnection;
import io.antmedia.datastore.db.types.SocialEndpointCredentials;
import io.antmedia.datastore.db.types.StreamInfo;
import io.antmedia.datastore.db.types.Subscriber;
import io.antmedia.datastore.db.types.SubscriberStats;
import io.antmedia.datastore.db.types.TensorFlowObject;
import io.antmedia.datastore.db.types.Token;
import io.antmedia.datastore.db.types.VoD;
public abstract class DataStore {
//Do not forget to write function descriptions especially if you are adding new functions
public static final int MAX_ITEM_IN_ONE_LIST = 50;
private boolean writeStatsToDatastore = true;
protected volatile boolean available = false;
protected static Logger logger = LoggerFactory.getLogger(DataStore.class);
public abstract String save(Broadcast broadcast);
/**
* Return the broadcast in data store
* @param id
* @return broadcast
*/
public abstract Broadcast get(String id);
/**
* Return the vod by id
* @param id
* @return Vod object
*/
public abstract VoD getVoD(String id);
public abstract boolean updateStatus(String id, String status);
public static final long TOTAL_WEBRTC_VIEWER_COUNT_CACHE_TIME = 5000;
protected int totalWebRTCViewerCount = 0;
protected long totalWebRTCViewerCountLastUpdateTime = 0;
public boolean updateSourceQualityParameters(String id, String quality, double speed, int pendingPacketQueue) {
if(writeStatsToDatastore) {
return updateSourceQualityParametersLocal(id, quality, speed, pendingPacketQueue);
}
return false;
}
protected abstract boolean updateSourceQualityParametersLocal(String id, String quality, double speed, int pendingPacketQueue);
public abstract boolean updateDuration(String id, long duration);
/**
* Returns the number of vods which contains searched string
* @param search is used for searching in vodIds and names of the vods
* @return
*/
public abstract long getPartialVodNumber(String search);
/**
* Returns the number of broadcasts which contains searched string
* @param search is used for searching in streamIds and names of the stream
* @return
*/
public abstract long getPartialBroadcastNumber(String search);
public abstract boolean addEndpoint(String id, Endpoint endpoint);
public abstract String addVod(VoD vod);
public abstract long getBroadcastCount();
public abstract boolean delete(String id);
public abstract boolean deleteVod(String id);
/**
* Returns the Broadcast List in order
*
* @param offset the number of items to skip
* @param size batch size
* @param type can get "liveStream" or "ipCamera" or "streamSource" or "VoD" values. Default is getting all broadcast types.
* @param sortBy can get "name" or "date" or "status" values
* @param orderBy can get "desc" or "asc"
* @param search is used for searching in streamIds and names of the stream
* @return
*/
public abstract List getBroadcastList(int offset, int size, String type, String sortBy, String orderBy, String search);
/**
* Returns the Conference Room List in order
*
* @param offset the number of items to skip
* @param size batch size
* @param sortBy can get "name" or "startDate" or "endDate" values
* @param orderBy can get "desc" or "asc"
* @param search is used for searching in RoomId
* @return
*/
public abstract List getConferenceRoomList(int offset, int size, String sortBy, String orderBy, String search);
public abstract boolean removeEndpoint(String id, Endpoint endpoint, boolean checkRTMPUrl);
public abstract List getExternalStreamsList();
public abstract void close();
/**
* Returns the VoD List in order
*
* @param offset: the number of items to skip
* @param size: batch size
* @param sortBy can get "name" or "date" values
* @param orderBy can get "desc" or "asc"
* @param filterStreamId is used for filtering the vod by stream id. If it's null or empty, it's not used
* @param search is used for searching in vodIds and names of the vods.
* @return
*/
public abstract List getVodList(int offset, int size, String sortBy, String orderBy, String filterStreamId, String search);
public abstract boolean removeAllEndpoints(String id);
public abstract long getTotalVodNumber();
public abstract long getTotalBroadcastNumber();
public abstract void saveDetection(String id,long timeElapsed,List detectedObjects);
public abstract List getDetectionList(String idFilter, int offsetSize, int batchSize);
public abstract List getDetection(String id);
/**
* saves token to store
* @param token - created token
* @return true/false
*/
public abstract boolean saveToken (Token token);
/**
* Lists all tokens of requested stream
* @param streamId
* @param offset
* @param size
* @return lists of tokens
*/
public abstract List listAllTokens (String streamId, int offset, int size);
/**
* Validates token
* @param token
* @param streamId
* @return token if validated, null if not
*/
public abstract Token validateToken (Token token);
/**
* Delete all tokens of the stream
* @param streamId
*/
public abstract boolean revokeTokens (String streamId);
/**
* Delete specific token
* @param tokenId id of the token
*/
public abstract boolean deleteToken (String tokenId);
/**
* retrieve specific token
* @param tokenId id of the token
*/
public abstract Token getToken (String tokenId);
/**
* Lists all subscribers of requested stream
* @param streamId
* @param offset
* @param size
* @return lists of subscribers
*/
public abstract List listAllSubscribers(String streamId, int offset, int size);
/**
* Lists all subscriber statistics of requested stream
* @param streamId
* @param offset
* @param size
* @return lists of subscriber statistics
*/
public List listAllSubscriberStats(String streamId, int offset, int size) {
List subscribers= listAllSubscribers(streamId, offset, size);
List subscriberStats = new ArrayList<>();
for(Subscriber subscriber : subscribers) {
subscriberStats.add(subscriber.getStats());
}
return subscriberStats;
}
/**
* adds subscriber to the datastore for this stream
* @param streamId
* @param subscriber - subscriber to be added
* @return- true if set, false if not
*/
public abstract boolean addSubscriber(String streamId, Subscriber subscriber);
/**
* deletes subscriber from the datastore for this stream
* @param streamId
* @param subscriberId - id of the subsciber to be deleted
* @return- true if set, false if not
*/
public abstract boolean deleteSubscriber(String streamId, String subscriberId);
/**
* deletes all subscriber from the datastore for this stream
* @param streamId
* @return- true if set, false if not
*/
public abstract boolean revokeSubscribers(String streamId);
/**
* gets subscriber from the datastore
* @param streamId
* @param subscriberId - id of the subsciber to be deleted
* @return- Subscriber
*/
public abstract Subscriber getSubscriber (String streamId, String subscriberId);
/**
* gets the connection status of the subscriber from the datastore
* @param streamId
* @param subscriberId - id of the subscriber
* @return- true if connected else false
*/
public boolean isSubscriberConnected(String streamId, String subscriberId) {
Subscriber subscriber = getSubscriber(streamId, subscriberId);
if(subscriber != null) {
return subscriber.isConnected();
}
return false;
}
/**
* sets the connection status of the subscriber in the datastore
* @param streamId
* @param subscriberId - id of the subscriber
* @param event - connection event which occured for this subscriber
* @return- true if successful else false
*/
public boolean addSubscriberConnectionEvent(String streamId, String subscriberId, ConnectionEvent event) {
boolean result = false;
Subscriber subscriber = getSubscriber(streamId, subscriberId);
if (subscriber != null) {
handleConnectionEvent(subscriber, event);
addSubscriber(streamId, subscriber);
result = true;
}
return result;
}
// helper method used by all datastores
protected void handleConnectionEvent(Subscriber subscriber, ConnectionEvent event) {
if(ConnectionEvent.CONNECTED_EVENT.equals(event.getEventType())) {
subscriber.setConnected(true);
} else if(ConnectionEvent.DISCONNECTED_EVENT.equals(event.getEventType())) {
subscriber.setConnected(false);
}
subscriber.getStats().addConnectionEvent(event);
}
/**
* sets the avarage bitrate of the subscriber in the datastore
* @param streamId
* @param subscriberId - id of the subscriber
* @param event - bitrate measurement event
* @return- true if successful else false
*/
public boolean updateSubscriberBitrateEvent(String streamId, String subscriberId,
long avgVideoBitrate, long avgAudioBitrate) {
boolean result = false;
Subscriber subscriber = getSubscriber(streamId, subscriberId);
if (subscriber != null) {
subscriber.getStats().setAvgVideoBitrate(avgVideoBitrate);
subscriber.getStats().setAvgAudioBitrate(avgAudioBitrate);
addSubscriber(streamId, subscriber);
result = true;
}
return result;
}
/**
* sets the connection status of all the subscribers false in the datastore
* called after an ungraceful shutdown
* @return- true if successful else false
*/
public abstract boolean resetSubscribersConnectedStatus ();
/**
* enables or disables mp4 muxing for the stream
* @param streamId- id of the stream
* @param enabled 1 means enabled, -1 means disabled, 0 means no setting for the stream
* @return- true if set, false if not
*/
public abstract boolean setMp4Muxing(String streamId, int enabled);
/**
* enables or disables WebM muxing for the stream
* @param streamId- id of the stream
* @param enabled 1 means enabled, -1 means disabled, 0 means no setting for the stream
* @return- true if set, false if not
*/
public abstract boolean setWebMMuxing(String streamId, int enabled);
/**
* Gets the video files under the {@code fileDir} directory parameter
* and saves them to the datastore as USER_VOD in {@code Vod} class
* @param file
* @return number of files that are saved to datastore
*/
public abstract int fetchUserVodList(File filedir);
/**
* Add social endpoint credentials to data store
* Do not add id to the credentials, it will be added by data store
* @param credentials
* The credentials that will be stored to datastore
*
* @return SocialEndpointCredentials by settings id of the credentials
* null if it is not saved to datastore
*
*/
public abstract SocialEndpointCredentials addSocialEndpointCredentials(SocialEndpointCredentials credentials);
/**
* Get list of social endpoints
*
* @param offset
* @param size
*
* @return list of social endpoints
*/
public abstract List getSocialEndpoints(int offset, int size);
/**
* Remove social endpoint from data store
* @param id , this is the id of the credential
*
* @return true if it is removed from datastore
* false if it is not removed
*/
public abstract boolean removeSocialEndpointCredentials(String id);
/**
* Return social endpoint credential that having the id
*
* @param id the id of the credential to be returns
* @return {@link SocialEndpointCredentials} if there is a matching credential with the id
* null if there is no matching id
*/
public abstract SocialEndpointCredentials getSocialEndpointCredentials(String id);
/**
* Return the number of active broadcasts in the server
* @return
*/
public abstract long getActiveBroadcastCount();
/**
* Updates the Broadcast objects fields if it's not null.
* The updated fields are as follows
* name, description, userName, password, IP address, streamUrl
* @param broadcast
* @return
*/
public abstract boolean updateBroadcastFields(String streamId, Broadcast broadcast);
/**
* Add or subtract the HLS viewer count from current value
* @param streamId
* @param diffCount
*/
public boolean updateHLSViewerCount(String streamId, int diffCount) {
if (writeStatsToDatastore) {
return updateHLSViewerCountLocal(streamId, diffCount);
}
return false;
}
protected abstract boolean updateHLSViewerCountLocal(String streamId, int diffCount);
/**
* Returns the total number of detected objects in the stream
* @param id is the stream id
* @return total number of detected objects
*/
public abstract long getObjectDetectedTotal(String streamId);
/**
* Update the WebRTC viewer count
* @param streamId
* @param increment if it is true, increment viewer count by one
* if it is false, decrement viewer count by one
*/
public boolean updateWebRTCViewerCount(String streamId, boolean increment) {
if (writeStatsToDatastore) {
return updateWebRTCViewerCountLocal(streamId, increment);
}
return false;
}
protected abstract boolean updateWebRTCViewerCountLocal(String streamId, boolean increment);
/**
* Update the RTMP viewer count
* @param streamId
* @param increment if it is true, increment viewer count by one
* if it is false, decrement viewer count by one
*/
public boolean updateRtmpViewerCount(String streamId, boolean increment) {
if (writeStatsToDatastore) {
return updateRtmpViewerCountLocal(streamId, increment);
}
return false;
}
protected abstract boolean updateRtmpViewerCountLocal(String streamId, boolean increment);
/**
* Saves the stream info to the db
* @param streamInfo
*/
public abstract void saveStreamInfo(StreamInfo streamInfo);
/**
* Add stream info list to db
* @param streamInfoList
*/
public abstract void addStreamInfoList(List streamInfoList);
/**
* Returns stream info list added to db
* @param streamId
* @return
*/
public abstract List getStreamInfoList(String streamId);
/**
* Remove the stream info list from db
* @param streamId
*/
public abstract void clearStreamInfoList(String streamId);
public boolean isWriteStatsToDatastore() {
return writeStatsToDatastore;
}
public void setWriteStatsToDatastore(boolean writeStatsToDatastore) {
this.writeStatsToDatastore = writeStatsToDatastore;
}
/**
* Creates a conference room with the parameters.
* The room name is key so if this is called with the same room name
* then new room is overwritten to old one.
* @param room - conference room
* @return true if successfully created, false if not
*/
public abstract boolean createConferenceRoom(ConferenceRoom room);
/**
* Edits previously saved conference room
* @param room - conference room
* @return true if successfully edited, false if not
*/
public abstract boolean editConferenceRoom(String roomId, ConferenceRoom room);
/**
* Deletes previously saved conference room
* @param roomName- name of the conference room
* @return true if successfully deleted, false if not
*/
public abstract boolean deleteConferenceRoom(String roomId);
/**
* Retrieves previously saved conference room
* @param roomName- name of the conference room
* @return room - conference room
*/
public abstract ConferenceRoom getConferenceRoom(String roomId);
/**
* Updates the stream fields if it's not null
* @param broadcast
* @param name
* @param description
* @param userName
* @param password
* @param ipAddr
* @param streamUrl
*/
protected void updateStreamInfo(Broadcast broadcast, Broadcast newBroadcast)
{
if (newBroadcast.getName() != null) {
broadcast.setName(newBroadcast.getName());
}
if (newBroadcast.getDescription() != null) {
broadcast.setDescription(newBroadcast.getDescription());
}
if (newBroadcast.getUsername() != null) {
broadcast.setUsername(newBroadcast.getUsername());
}
if (newBroadcast.getPassword() != null) {
broadcast.setPassword(newBroadcast.getPassword());
}
if (newBroadcast.getIpAddr() != null) {
broadcast.setIpAddr(newBroadcast.getIpAddr());
}
if (newBroadcast.getStreamUrl() != null) {
broadcast.setStreamUrl(newBroadcast.getStreamUrl());
}
if (newBroadcast.getLatitude() != null) {
broadcast.setLatitude(newBroadcast.getLatitude());
}
if (newBroadcast.getLongitude() != null) {
broadcast.setLongitude(newBroadcast.getLongitude());
}
if (newBroadcast.getAltitude() != null) {
broadcast.setAltitude(newBroadcast.getAltitude());
}
if (newBroadcast.getMainTrackStreamId() != null) {
broadcast.setMainTrackStreamId(newBroadcast.getMainTrackStreamId());
}
if (newBroadcast.getStartTime() != 0) {
broadcast.setStartTime(newBroadcast.getStartTime());
}
if (newBroadcast.getOriginAdress() != null) {
broadcast.setOriginAdress(newBroadcast.getOriginAdress());
}
if (newBroadcast.getStatus() != null) {
broadcast.setStatus(newBroadcast.getStatus());
}
if (newBroadcast.getAbsoluteStartTimeMs() != 0) {
broadcast.setAbsoluteStartTimeMs(newBroadcast.getAbsoluteStartTimeMs());
}
if (newBroadcast.getPlayListItemList() != null) {
broadcast.setPlayListItemList(newBroadcast.getPlayListItemList());
}
if (newBroadcast.getPlayListStatus() != null) {
broadcast.setPlayListStatus(newBroadcast.getPlayListStatus());
}
if (newBroadcast.getEndPointList() != null) {
broadcast.setEndPointList(newBroadcast.getEndPointList());
}
broadcast.setCurrentPlayIndex(newBroadcast.getCurrentPlayIndex());
broadcast.setReceivedBytes(newBroadcast.getReceivedBytes());
broadcast.setDuration(newBroadcast.getDuration());
broadcast.setBitrate(newBroadcast.getBitrate());
broadcast.setUserAgent(newBroadcast.getUserAgent());
broadcast.setWebRTCViewerLimit(newBroadcast.getWebRTCViewerLimit());
broadcast.setHlsViewerLimit(newBroadcast.getHlsViewerLimit());
}
/**
* This method returns the local active broadcast count.
* Mongodb implementation is different because of cluster.
* Other implementations just return active broadcasts in db
* @return
*/
public long getLocalLiveBroadcastCount(String hostAddress) {
return getActiveBroadcastCount();
}
/**
* Below search methods and sortandcrop methods are used for getting the searched items and sorting and pagination.
* Sorting, search and cropping is available for Broadcasts, VoDs and Conference Rooms.
* They are used by InMemoryDataStore and MapDBStore, Mongodb implements the same functionality inside its own class.
*/
protected ArrayList searchOnServerVod(ArrayList broadcastList, String search){
if(search != null && !search.isEmpty()) {
for (Iterator i = broadcastList.iterator(); i.hasNext(); ) {
VoD item = i.next();
if(item.getVodName() != null && item.getStreamName() != null && item.getStreamId() != null && item.getVodId() != null) {
if (item.getVodName().toLowerCase().contains(search.toLowerCase()) || item.getStreamId().toLowerCase().contains(search.toLowerCase()) || item.getStreamName().toLowerCase().contains(search.toLowerCase()) || item.getVodId().toLowerCase().contains(search.toLowerCase()))
continue;
else i.remove();
}
else if (item.getVodName()!= null && item.getVodId() != null){
if (item.getVodName().toLowerCase().contains(search.toLowerCase()) || item.getVodId().toLowerCase().contains(search.toLowerCase()))
continue;
else i.remove();
}
else{
if (item.getVodId() != null){
if (item.getVodId().toLowerCase().contains(search.toLowerCase()))
continue;
else i.remove();
}
}
}
}
return broadcastList;
}
protected List sortAndCropVodList(List vodList, int offset, int size, String sortBy, String orderBy) {
if(sortBy != null && orderBy != null && !sortBy.isEmpty() && !orderBy.isEmpty()) {
if(sortBy.contentEquals("date") || sortBy.contentEquals("name")) {
Collections.sort(vodList, new Comparator() {
@Override
public int compare(VoD vod1, VoD vod2) {
Comparable c1 = null;
Comparable c2 = null;
if (sortBy.contentEquals("name")) {
c1 = vod1.getVodName().toLowerCase();
c2 = vod2.getVodName().toLowerCase();
} else if (sortBy.contentEquals("date")) {
c1 = new Long(vod1.getCreationDate());
c2 = new Long(vod2.getCreationDate());
}
if (orderBy.contentEquals("desc")) {
return c2.compareTo(c1);
} else if (orderBy != null && !(orderBy.isEmpty())) {
//Wrong entry check to not get null pointer.
}
return c1.compareTo(c2);
}
});
}
}
if (size > MAX_ITEM_IN_ONE_LIST) {
size = MAX_ITEM_IN_ONE_LIST;
}
if (offset < 0) {
offset = 0;
}
int toIndex = Math.min(offset+size, vodList.size());
if (offset >= toIndex)
{
return new ArrayList<>();
}
else {
return vodList.subList(offset, Math.min(offset+size, vodList.size()));
}
}
protected ArrayList searchOnServer(ArrayList broadcastList, String search){
if(search != null && !search.isEmpty()) {
for (Iterator i = broadcastList.iterator(); i.hasNext(); ) {
Broadcast item = i.next();
if(item.getName() != null && item.getStreamId() != null) {
if (item.getName().toLowerCase().contains(search.toLowerCase()) || item.getStreamId().toLowerCase().contains(search.toLowerCase()))
continue;
else i.remove();
}
else{
if (item.getStreamId().toLowerCase().contains(search.toLowerCase()))
continue;
else i.remove();
}
}
}
return broadcastList;
}
protected List sortAndCropBroadcastList(List broadcastList, int offset, int size, String sortBy, String orderBy) {
if(sortBy != null && orderBy != null && !sortBy.isEmpty() && !orderBy.isEmpty() )
{
if(sortBy.equals("name") || sortBy.equals("date") || sortBy.equals("status")) {
Collections.sort(broadcastList, new Comparator() {
@Override
public int compare(Broadcast broadcast1, Broadcast broadcast2) {
Comparable c1 = null;
Comparable c2 = null;
if (sortBy.equals("name")) {
c1 = broadcast1.getName().toLowerCase();
c2 = broadcast2.getName().toLowerCase();
} else if (sortBy.equals("date")) {
c1 = new Long(broadcast1.getDate());
c2 = new Long(broadcast2.getDate());
} else if (sortBy.equals("status")) {
c1 = broadcast1.getStatus();
c2 = broadcast2.getStatus();
} else if (sortBy != null && !(sortBy.isEmpty())) {
//Wrong entry check to not get null pointer.
}
if (orderBy.equals("desc")) {
return c2.compareTo(c1);
} else if (orderBy != null && !(orderBy.isEmpty())) {
//Wrong entry check to not get null pointer.
}
return c1.compareTo(c2);
}
});
}
}
if (size > MAX_ITEM_IN_ONE_LIST) {
size = MAX_ITEM_IN_ONE_LIST;
}
if (offset < 0 ) {
offset = 0;
}
int toIndex = Math.min(offset+size, broadcastList.size());
if (offset >= toIndex)
{
return new ArrayList<>();
}
else {
return broadcastList.subList(offset,toIndex);
}
}
protected ArrayList searchOnServerConferenceRoom(ArrayList roomList, String search){
if(search != null && !search.isEmpty()) {
for (Iterator i = roomList.iterator(); i.hasNext(); ) {
ConferenceRoom item = i.next();
if(item.getRoomId() != null) {
if (item.getRoomId().toLowerCase().contains(search.toLowerCase()))
continue;
else i.remove();
}
}
}
return roomList;
}
protected List sortAndCropConferenceRoomList(List roomList, int offset, int size, String sortBy, String orderBy) {
if(sortBy != null && orderBy != null && !sortBy.isEmpty() && !orderBy.isEmpty())
{
if(sortBy.equals("roomId") || sortBy.equals("startDate") || sortBy.equals("endDate") ) {
Collections.sort(roomList, new Comparator() {
@Override
public int compare(ConferenceRoom room1, ConferenceRoom room2) {
Comparable c1 = null;
Comparable c2 = null;
if (sortBy.equals("roomId")) {
c1 = room1.getRoomId().toLowerCase();
c2 = room2.getRoomId().toLowerCase();
} else if (sortBy.equals("startDate")) {
c1 = new Long(room1.getStartDate());
c2 = new Long(room2.getStartDate());
} else if (sortBy.equals("endDate")) {
c1 = new Long(room1.getEndDate());
c2 = new Long(room2.getEndDate());
} else if (sortBy != null && !(sortBy.isEmpty())) {
//Wrong entry check to not get null pointer.
}
if (orderBy.equals("desc")) {
return c2.compareTo(c1);
} else if (orderBy != null && !(orderBy.isEmpty())) {
//Wrong entry check to not get null pointer.
}
return c1.compareTo(c2);
}
});
}
}
if (size > MAX_ITEM_IN_ONE_LIST) {
size = MAX_ITEM_IN_ONE_LIST;
}
if (offset < 0 ) {
offset = 0;
}
int toIndex = Math.min(offset+size, roomList.size());
if (offset >= toIndex)
{
return new ArrayList<>();
}
else {
return roomList.subList(offset,toIndex);
}
}
/**
* Creates new P2PConnection
* @param conn - P2PConnection object
* @return boolean - success
*/
public abstract boolean createP2PConnection(P2PConnection conn);
/**
* Get the P2PConnection by streamId
* @param streamId - stream id for P2PConnection
* @return P2PConnection - if exist else null
*/
public abstract P2PConnection getP2PConnection(String streamId);
/**
* Deletes a P2PConnection
* @param conn - P2PConnection object
* @return boolean - success
*/
public abstract boolean deleteP2PConnection(String streamId);
/**
* Add a subtrack id to a main track (broadcast)
* @param mainTrackId - main track id
* @param subTrackId - main track id
* @return boolean - success
*/
public abstract boolean addSubTrack(String mainTrackId, String subTrackId);
/**
* Resets the broadcasts in the database.
* It sets number of viewers to zero.
* It also delete the stream if it's zombi stream
*
* @returns total number of operation in the db
*/
public abstract int resetBroadcasts(String hostAddress);
/**
* Return if data store is available. DataStore is available if it's initialized and not closed.
* It's not available if it's closed.
* @return availability of the datastore
*/
public boolean isAvailable() {
return available;
}
/**
* This is used to get total number of WebRTC viewers
*
* @returns total number of WebRTC viewers
*/
public abstract int getTotalWebRTCViewersCount();
//**************************************
//ATTENTION: Write function descriptions while adding new functions
//**************************************
}