| Package | flash.net |
| Class | public class NetGroup |
| Inheritance | NetGroup  EventDispatcher Object |
| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
-
Monitor Quality of Service. The
infoproperty contains a NetGroupInfo object whose properties provide QoS statistics for this group. -
Posting. Call
post()to broadcast ActionScript messages to all members of a group. -
Direct routing. Call
sendToNearest(),sendToNeighbor(), andsendToAllNeighbors()to send a short data message to a specific member of a peer-to-peer group. The source and the destination do not need to have a direct connection. -
Object replication. Call
addHaveObjects(),removeHaveObjects(),addWantObjects(),removeWantObjects(),writeRequestedObject(), anddenyRequestedObject()to break up large data into pieces and replicate it to all nodes in a peer-to-peer group.
In the client-side NetGroup class, the NetConnection dispatches the following events:
- NetGroup.Connect.Success
- NetGroup.Connect.Failed
- NetGroup.Connect.Rejected
The info.group property of the event object contains a reference to the event source (the NetGroup).
The NetGroup dispatches all other events. In the server-side NetGroup class, the NetGroup dispatches all events.
For information about using groups with peer-assisted networking, see Social Media Experiences with Flash Media and RTMFP, also by Tom Krcha.
For information about the technical details behind peer-assisted networking, see P2P on the Flash Platform with RTMFP by Adobe Computer Scientist Matthew Kaufman.
Related API Elements
flash.net.NetStream
flash.events.NetStatusEvent info.code values starting with "NetGroup."
Hide Inherited Public Properties
Show Inherited Public Properties| Property | Defined By | ||
|---|---|---|---|
 | constructor : Object
A reference to the class object or constructor function for a given object instance. | Object | |
| estimatedMemberCount : Number [read-only]
Specifies the estimated number of members of the group, based on local neighbor density and
assuming an even distribution of group addresses. | NetGroup | ||
| info : NetGroupInfo [read-only]
Returns a NetGroupInfo object whose properties provide Quality of Service
statistics about this NetGroup's RTMFP peer-to-peer data transport. | NetGroup | ||
| localCoverageFrom : String [read-only]
Specifies the start of the range of group addresses for which this node is the "nearest" and responsible. | NetGroup | ||
| localCoverageTo : String [read-only]
Specifies the end of the range of group addresses for which this node is the "nearest" and responsible. | NetGroup | ||
| neighborCount : Number [read-only]
Specifies the number of group members to which this node is directly connected. | NetGroup | ||
| receiveMode : String
Specifies this node's routing receive mode as one of values in the NetGroupReceiveMode enum class. | NetGroup | ||
| replicationStrategy : String
Specifies the object replication fetch strategy. | NetGroup | ||
| Method | Defined By | ||
|---|---|---|---|
Constructs a NetGroup on the specified NetConnection object and joins it to the group
specified by groupspec. | NetGroup | ||
| addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registers an event listener object with an EventDispatcher object so that the listener
receives notification of an event. | EventDispatcher | |
Adds objects from startIndex through endIndex, to the set of objects this node
advertises to neighbors as objects for which it fulfills requests. | NetGroup | ||
Manually adds a record specifying that peerID is a member of the group. | NetGroup | ||
Manually adds a neighbor by immediately connecting directly to the specified peerID, which must already be
in this group. | NetGroup | ||
Adds objects from startIndex through endIndex, to the set of objects to retrieve. | NetGroup | ||
Disconnect from the group and close this NetGroup. | NetGroup | ||
Converts a peerID to a group address suitable for use with the sendToNearest() method. | NetGroup | ||
Denies a request received in a NetStatusEvent
NetGroup.Replication.Request for an object previously advertised with
addHaveObjects(). | NetGroup | ||
|
Dispatches an event into the event flow. | EventDispatcher | |
|
Checks whether the EventDispatcher object has any listeners registered for a specific type
of event. | EventDispatcher | |
|
Indicates whether an object has a specified property defined. | Object | |
|
Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter. | Object | |
Sends a message to all members of a group. | NetGroup | ||
|
Indicates whether the specified property exists and is enumerable. | Object | |
|
Removes a listener from the EventDispatcher object. | EventDispatcher | |
Removes objects from startIndex through endIndex, from the set of objects this node
advertises to neighbors as objects for which it fulfills requests. | NetGroup | ||
Removes objects from startIndex through endIndex, from the set of objects to retrieve. | NetGroup | ||
Sends a message to all neighbors. | NetGroup | ||
Sends a message to the neighbor (or local node) nearest to the specified group address. | NetGroup | ||
Sends a message to the neighbor specified by the sendMode parameter. | NetGroup | ||
|
Sets the availability of a dynamic property for loop operations. | Object | |
|
Returns the string representation of this object, formatted according to locale-specific conventions. | Object | |
|
Returns the string representation of the specified object. | Object | |
|
Returns the primitive value of the specified object. | Object | |
|
Checks whether an event listener is registered with this EventDispatcher object or any of
its ancestors for the specified event type. | EventDispatcher | |
Satisfies the request as received by
NetStatusEvent NetGroup.Replication.Request for an object previously
advertised with the addHaveObjects() method. | NetGroup | ||
| Event | Summary | Defined By | ||
|---|---|---|---|---|
| [broadcast event] Dispatched when the Flash Player or AIR application gains operating system focus and becomes active. | EventDispatcher | ||
| [broadcast event] Dispatched when the Flash Player or AIR application operating loses system focus and is becoming inactive. | EventDispatcher | ||
| Dispatched when a NetGroup object is reporting its status or error condition. | NetGroup | |||
estimatedMemberCount | property |
estimatedMemberCount:Number [read-only] | Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Specifies the estimated number of members of the group, based on local neighbor density and assuming an even distribution of group addresses.
Implementation
public function get estimatedMemberCount():NumberRelated API Elements
info | property |
info:NetGroupInfo [read-only] | Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Returns a NetGroupInfo object whose properties provide Quality of Service statistics about this NetGroup's RTMFP peer-to-peer data transport.
Implementation
public function get info():NetGroupInfoRelated API Elements
localCoverageFrom | property |
localCoverageFrom:String [read-only] | Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Specifies the start of the range of group addresses for which this node is the "nearest" and responsible. The range is specified in the increasing direction along the group address ring mod 2256.
Implementation
public function get localCoverageFrom():StringRelated API Elements
localCoverageTo | property |
localCoverageTo:String [read-only] | Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Specifies the end of the range of group addresses for which this node is the "nearest" and responsible. The range is specified in the increasing direction along the group address ring mod 2256.
Implementation
public function get localCoverageTo():StringRelated API Elements
neighborCount | property |
receiveMode | property |
receiveMode:String| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Specifies this node's routing receive mode as one of values in the NetGroupReceiveMode enum class.
Implementation
public function get receiveMode():String public function set receiveMode(value:String):voidRelated API Elements
replicationStrategy | property |
replicationStrategy:String| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Specifies the object replication fetch strategy. The value is one of the enumerated values in the NetGroupReplicationStrategy class.
Implementation
public function get replicationStrategy():String public function set replicationStrategy(value:String):voidRelated API Elements
NetGroup | () | Constructor |
public function NetGroup(connection:NetConnection, groupspec:String)| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Constructs a NetGroup on the specified NetConnection object and joins it to the group
specified by groupspec.
In most cases, a groupspec has the potential for using the network uplink on the local system.
When a NetStream or NetGroup object is constructed with a groupspec, Flash Player displays a Privacy Dialog.
The dialog asks whether Flash Player can use the connection to share data with a user's peers.
If the user clicks "Allow for this domain", the dialog is not displayed the next time the user connects to this application.
If a user does not allow peer-assisted networking, all peer features within the group (posting, directed routing, and object replication, and multicast)
are disabled. If permission is allowed, a NetStatusEvent is sent to the NetConnection's event listener
with NetGroup.Connect.Success in the code property of the info object.
If permission is denied, the code property is NetGroup.Connect.Rejected.
Until a NetGroup.Connect.Success event is received, an exception is thrown
if you try to call any method of the NetGroup object.
Note: When a client subscribes to a native-IP multicast stream, the security dialog is not displayed.
Parametersconnection:NetConnection — A NetConnection object.
| |
groupspec:String — A string specifying the RTMFP peer-to-peer group to join, including its name, capabilities,
restrictions, and the authorizations of this member.
new NetGroup(myConnection, myGroupSpecifier.groupspecWithAuthorizations());
|
Throws
ArgumentError — The NetConnection instance is not connected.
| |
Error — The groupspec is invalid.
|
Related API Elements
addHaveObjects | () | method |
public function addHaveObjects(startIndex:Number, endIndex:Number):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Adds objects from startIndex through endIndex, to the set of objects this node
advertises to neighbors as objects for which it fulfills requests. By default,
the Have set is empty. Indices must be whole numbers from 0 through 9007199254740992.
For more information about object replication, see "Replicate an object within a group" in Flash Media Server Developer’s Guide.
This method sends a NetStatusEvent to the NetGroup's event listener with "NetGroup.Replication.Request"
in the code property of the info object.
NOTE: Test for the NetGroup.Neighbor.Connect event before calling this method.
Parameters
startIndex:Number — The beginning of the range of object indices to add to the Have set.
| |
endIndex:Number — The end of the range of object indices to add to the Have set.
|
Throws
RangeError — A number passed to this method is less than 0
or greater than 9007199254740992.
|
Related API Elements
addMemberHint | () | method |
public function addMemberHint(peerID:String):Boolean| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Manually adds a record specifying that peerID is a member of the group.
An immediate connection to it is attempted only if it is needed for the topology.
Parameters
peerID:String — The peerID to add to the set of potential neighbors.
|
Boolean — TRUE for success, FALSE for failure.
|
Related API Elements
addNeighbor | () | method |
public function addNeighbor(peerID:String):Boolean| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Manually adds a neighbor by immediately connecting directly to the specified peerID, which must already be
in this group. This direct connection may later be dropped if it is not needed for the topology.
Parameters
peerID:String — The peerID to which to immediately connect.
|
Boolean — TRUE for success, FALSE for failure.
|
Related API Elements
addWantObjects | () | method |
public function addWantObjects(startIndex:Number, endIndex:Number):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Adds objects from startIndex through endIndex, to the set of objects to retrieve.
Indices must be whole numbers from 0 through 9007199254740992.
By default, the Want set is empty.
For more information about object replication, see "Replicate an object within a group" in Flash Media Server Developer’s Guide.
This method sends a NetStatusEvent to the NetGroup's event listener with
NetGroup.Replication.Fetch.SendNotify
in the info.code property. This event is followed by an NetGroup.Replication.Fetch.Failed
or NetGroup.Replication.Fetch.Result event.
NOTE: Test for the NetGroup.Neighbor.Connect event before calling this method.
Parameters
startIndex:Number — The beginning of the range of object indices to add to the Want set.
| |
endIndex:Number — The end of the range of object indices to add to the Want set.
|
Throws
RangeError — A number passed to this method is less than 0
or greater than 9007199254740992.
|
Related API Elements
close | () | method |
public function close():void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Disconnect from the group and close this NetGroup. This NetGroup is not usable after calling this method.
convertPeerIDToGroupAddress | () | method |
public function convertPeerIDToGroupAddress(peerID:String):String| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Converts a peerID to a group address suitable for use with the sendToNearest() method.
Parameters
peerID:String — The peerID to convert.
|
String — The group address for the peerID.
|
Related API Elements
denyRequestedObject | () | method |
public function denyRequestedObject(requestID:int):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Denies a request received in a NetStatusEvent
NetGroup.Replication.Request for an object previously advertised with
addHaveObjects(). The requestor can request this object again unless
or until it is withdrawn from the Have set.
For more information about object replication, see "Replicate an object within a group" in Flash Media Server Developer’s Guide.
NOTE: Test for the NetGroup.Neighbor.Connect event before calling this method.
Parameters
requestID:int — The request identifier as given in the NetGroup.Replication.Request event.
|
Related API Elements
post | () | method |
public function post(message:Object):String| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Sends a message to all members of a group. To call this method,
the GroupSpecifier.postingEnabled property must be true in the groupspec passed to the
NetGroup constructor. For more information, see "Post messages to a group"
in Flash Media Server Developer’s Guide.
All messages must be unique. A message that is identical to one posted earlier might not be propagated. Use a sequence number to make messages unique.
Message delivery is not ordered. Message delivery is not guaranteed.
Messages are serialized in AMF. The message can be one of the following types: an Object, an int, a Number, or a String. The message cannot be a MovieClip.
This method sends a NetStatusEvent to the NetGroup's event listener
with "NetGroup.Posting.Notify" in the info.code property. The "NetGroup.Posting.Notify" event
is dispatched to the NetGroup on both the client and the server.
NOTE: Test for the NetGroup.Neighbor.Connect event before calling this method.
Parameters
message:Object — The message to send to all other members of the group.
|
String — The messageID of the message if posted, or null on error. The messageID is the hexadecmial of the SHA256 of the raw
bytes of the serialization of the message.
|
Related API Elements
Example ( How to use this example )
When you run the application, you can enter any group name into the text input field. The GroupSpecifier class uses the name (along with any GroupSpecifier properties you've set) to create a string which is the perpetually unique name of the group. To connect another client to the group, that client must use the same group name. For example, if client A uses the group name "firstmesh", other clients that want to communicate with client A must also use the group name "firstmesh". If client B uses the group name "kite", it will connect successfully, but it will create a new group and won't be able to communicate with client A or anyone in the "firstmesh" group.
To run this example, add a Button, a Label, a TextInput, and a TextArea component to the Library in Flash Pro.
package {
import flash.display.Sprite;
import flash.events.TextEvent;
import flash.events.MouseEvent;
import flash.events.NetStatusEvent;
import fl.events.ComponentEvent;
import fl.controls.Label;
import fl.controls.Button;
import fl.controls.TextInput;
import fl.controls.TextArea;
import flash.text.TextFieldAutoSize;
import flash.net.*;
public class NetGroupPostExample extends Sprite{
private var connectButton:Button;
private var disconnectButton:Button;
private var groupNameText:TextInput;
private var userNameText:TextInput;
private var chatText:TextInput;
private var statusLog:TextArea;
private var groupLabel:Label;
private var userLabel:Label;
private var netConnection:NetConnection = null;
private var netGroup:NetGroup = null;
private var sequenceNumber:uint = 0;
private var connected:Boolean = false;
private var joinedGroup:Boolean = false;
private const SERVER:String = "rtmfp://fms.example.com/someapp";
public function NetGroupPostExample() {
DoUI();
}
// Writes messages to the TextArea.
private function StatusMessage(msg:Object):void{
statusLog.text += msg;
statusLog.verticalScrollPosition = statusLog.textHeight;
statusLog.validateNow();
}
// Handles all NetStatusEvents for the NetConnection and the NetGroup.
// This code includes cases it doesn't handle so you can see the cases
// and their info objects for learning purposes.
private function NetStatusHandler(e:NetStatusEvent):void{
StatusMessage(e.info.code + "\n");
switch(e.info.code){
case "NetConnection.Connect.Success":
connectButton.enabled = false;
disconnectButton.enabled = true;
OnConnect();
break;
case "NetConnection.Connect.Closed":
OnDisconnect();
break;
case "NetGroup.Connect.Success": // e.info.group
OnNetGroupConnect();
break;
case "NetGroup.Connect.Rejected": // e.info.group
case "NetGroup.Connect.Failed": // e.info.group
break;
case "NetGroup.Posting.Notify": // e.info.message, e.info.messageID
OnPosting(e.info.message);
break;
case "NetStream.MulticastStream.Reset":
case "NetStream.Buffer.Full":
break;
case "NetGroup.SendTo.Notify": // e.info.message, e.info.from, e.info.fromLocal
case "NetGroup.LocalCoverage.Notify": //
case "NetGroup.Neighbor.Connect": // e.info.neighbor
case "NetGroup.Neighbor.Disconnect": // e.info.neighbor
case "NetGroup.MulticastStream.PublishNotify": // e.info.name
case "NetGroup.MulticastStream.UnpublishNotify": // e.info.name
case "NetGroup.Replication.Fetch.SendNotify": // e.info.index
case "NetGroup.Replication.Fetch.Failed": // e.info.index
case "NetGroup.Replication.Fetch.Result": // e.info.index, e.info.object
case "NetGroup.Replication.Request": // e.info.index, e.info.requestID
default:
break;
}
}
// Creates a NetConnection to Flash Media Server if the app isn't already connected
// and if there's a group name in the TextInput field.
private function DoConnect(e:MouseEvent):void{
if(!connected && (groupNameText.length > 0)){
StatusMessage("Connecting to \"" + SERVER + "\" ...\n");
netConnection = new NetConnection();
netConnection.addEventListener(NetStatusEvent.NET_STATUS, NetStatusHandler);
// To connect to Flash Media Server, pass the server name.
netConnection.connect(SERVER);
}
else
{
StatusMessage("Enter a group name");
}
}
// Called in the "NetConnection.Connect.Success" case in the NetStatusEvent handler.
private function OnConnect():void{
StatusMessage("Connected\n");
connected = true;
// Create a GroupSpecifier object to pass to the NetGroup constructor.
// The GroupSpecifier determines the properties of the group
var groupSpecifier:GroupSpecifier;
groupSpecifier = new GroupSpecifier("aslrexample/" + groupNameText.text);
groupSpecifier.postingEnabled = true;
groupSpecifier.serverChannelEnabled = true;
netGroup = new NetGroup(netConnection, groupSpecifier.groupspecWithAuthorizations());
netGroup.addEventListener(NetStatusEvent.NET_STATUS, NetStatusHandler);
StatusMessage("Join \"" + groupSpecifier.groupspecWithAuthorizations() + "\"\n");
}
private function OnNetGroupConnect():void{
joinedGroup = true;
}
private function DoDisconnect(e:MouseEvent):void{
if(netConnection){
netConnection.close();
}
}
private function OnDisconnect():void{
StatusMessage("Disconnected\n");
netConnection = null;
netGroup = null;
connected = false;
joinedGroup = false;
connectButton.enabled = true;
disconnectButton.enabled = false;
}
private function ClearChatText():void{
chatText.text = "";
}
// Called when you the chatText field has focus and you press Enter.
private function DoPost(e:ComponentEvent):void{
if(joinedGroup){
var message:Object = new Object;
message.user = userNameText.text;
message.text = chatText.text;
message.sequence = sequenceNumber++;
message.sender = netConnection.nearID;
netGroup.post(message);
StatusMessage("==> " + chatText.text + "\n");
} else {
StatusMessage("Click Connect before sending a chat message");
}
ClearChatText();
}
private function OnPosting(message:Object):void{
StatusMessage("<" + message.user + "> " + message.text + "\n");
}
private function DoUI():void {
groupLabel = new Label();
groupLabel.move(20, 10);
groupLabel.autoSize = TextFieldAutoSize.LEFT
groupLabel.text = "Group name:"
addChild(groupLabel);
groupNameText = new TextInput();
groupNameText.move(90, 10);
groupNameText.text = "channel" + (int(Math.random() * 899) + 101);
addChild(groupNameText);
connectButton = new Button();
connectButton.addEventListener(MouseEvent.CLICK, DoConnect);
connectButton.move(205, 10);
connectButton.label = "Connect";
addChild(connectButton);
disconnectButton = new Button();
disconnectButton.addEventListener(MouseEvent.CLICK, DoDisconnect);
disconnectButton.move(310, 10);
disconnectButton.label = "Disconnect";
disconnectButton.enabled = false;
addChild(disconnectButton);
statusLog = new TextArea();
statusLog.move(30, 38);
statusLog.width = 360;
statusLog.height = 215;
statusLog.editable = false;
addChild(statusLog);
userLabel = new Label();
userLabel.move(20, 270);
userLabel.autoSize = TextFieldAutoSize.LEFT
userLabel.text = "User name:"
addChild(userLabel);
userNameText = new TextInput();
userNameText.move(80, 270);
userNameText.text = "user " + int(Math.random() * 65536);
addChild(userNameText);
chatText = new TextInput();
chatText.addEventListener(ComponentEvent.ENTER, DoPost);
chatText.move(185, 270);
chatText.maxChars = 255;
chatText.width = 215;
addChild(chatText);
}
public function onPlayStatus(info:Object):void {}
public function onMetaData(info:Object):void {}
public function onCuePoint(info:Object):void {}
public function onTextData(info:Object):void {}
}
}
removeHaveObjects | () | method |
public function removeHaveObjects(startIndex:Number, endIndex:Number):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Removes objects from startIndex through endIndex, from the set of objects this node
advertises to neighbors as objects for which it fulfills requests.
Indices must be whole numbers from 0 through 9007199254740992.
For more information about object replication, see "Replicate an object within a group" in Flash Media Server Developer’s Guide.
NOTE: Test for the NetGroup.Neighbor.Connect event before calling this method.
Parameters
startIndex:Number — The beginning of the range of object indices to remove from the Have set.
| |
endIndex:Number — The end of the range of object indices to remove from the Have set.
|
Throws
RangeError — A number passed to this method is less than 0
or greater than 9007199254740992.
|
Related API Elements
removeWantObjects | () | method |
public function removeWantObjects(startIndex:Number, endIndex:Number):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Removes objects from startIndex through endIndex, from the set of objects to retrieve.
Indices must be whole numbers from 0 through 9007199254740992.
For more information about object replication, see "Replicate an object within a group" in Flash Media Server Developer’s Guide.
NOTE: Test for the NetGroup.Neighbor.Connect event before calling this method.
Parameters
startIndex:Number — The beginning of the range of object indices to remove from the Want set.
| |
endIndex:Number — The end of the range of object indices to remove from the Want set.
|
Throws
RangeError — A number passed to this method is less than 0
or greater than 9007199254740992.
|
Related API Elements
sendToAllNeighbors | () | method |
public function sendToAllNeighbors(message:Object):String| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Sends a message to all neighbors. Returns NetGroupSendResult.SENT if at least one neighbor was selected.
For more information about routing messages, see "Route messages directly to a peer" in Flash Media Server Developer’s Guide.
When a node receives a message, a NetStatusEvent is sent to the NetGroup's event listener
with NetGroup.SendTo.Notify
in the code property of the info object.
NOTE: Test for the NetGroup.Neighbor.Connect event before calling this method.
Parameters
message:Object — The message to send.
|
String — A property of enumeration class NetGroupSendResult indicating the success or failure of the send.
|
Related API Elements
sendToNearest | () | method |
public function sendToNearest(message:Object, groupAddress:String):String| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Sends a message to the neighbor (or local node) nearest to the specified group address.
Considers neighbors from the entire ring. Returns NetGroupSendResult.SENT if the message
was successfully sent toward its destination.
For more information about routing messages, see "Route messages directly to a peer" in Flash Media Server Developer’s Guide.
When a node receives a message, a NetStatusEvent is sent to the NetGroup's event listener
with NetGroup.SendTo.Notify
in the code property of the info object.
NOTE: Test for the NetGroup.Neighbor.Connect event before calling this method.
Parameters
message:Object — The message to send.
| |
groupAddress:String — The group address toward which to route the message.
|
String — A property of enumeration class NetGroupSendResult indicating the success or failure of the send.
|
Related API Elements
sendToNeighbor | () | method |
public function sendToNeighbor(message:Object, sendMode:String):String| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Sends a message to the neighbor specified by the sendMode parameter.
Returns NetGroupSendResult.SENT if the message was successfully sent to the requested destination.
For more information about routing messages, see "Route messages directly to a peer" in Flash Media Server Developer’s Guide.
When a node receives a message, a NetStatusEvent is sent to the NetGroup's event listener
with NetGroup.SendTo.Notify
in the code property of the info object.
NOTE: Test for the NetGroup.Neighbor.Connect event before calling this method.
Parameters
message:Object — The message to send.
| |
sendMode:String — A property of enumeration class NetGroupSendMode specifying the neighbor to which to send the message.
|
String — A property of enumeration class NetGroupSendResult indicating the success or failure of the send.
|
Related API Elements
writeRequestedObject | () | method |
public function writeRequestedObject(requestID:int, object:Object):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10.1, AIR 2 |
Satisfies the request as received by
NetStatusEvent NetGroup.Replication.Request for an object previously
advertised with the addHaveObjects() method. The object
can be any of the following: An Object, an int, a Number, and a String.
The object cannot be a MovieClip.
For more information about object replication, see "Replicate an object within a group" in Flash Media Server Developer’s Guide.
NOTE: Test for the NetGroup.Neighbor.Connect event before calling this method.
Parameters
requestID:int — The request identifier as given in the NetGroup.Replication.Request event.
| |
object:Object — The object corresponding to the index given in the NetGroup.Replication.Request event.
|
Related API Elements
netStatus | Event |
flash.events.NetStatusEventproperty NetStatusEvent.type =
flash.events.NetStatusEvent.NET_STATUS| Language Version: | ActionScript 3.0 |
| Runtime Versions: | AIR 1.0, Flash Player 10.1 |
Dispatched when a NetGroup object is reporting its status or error condition.
The netStatus event contains an info property.
The info property is an object that contains information about the event,
such as whether a connection attempt succeeded or failed.
type property of a netStatus event object.
This event has the following properties:
| Property | Value |
|---|---|
bubbles | false |
cancelable | false; there is no default behavior to cancel. |
currentTarget | The object that is actively processing the Event object with an event listener. |
info | An object with properties that describe the object's status or error condition. |
target | The NetConnection or NetStream object reporting its status. |
Related API Elements
When you run the application, you can enter any group name into the text input field. The GroupSpecifier class uses the name (along with any GroupSpecifier properties you've set) to create a string which is the perpetually unique name of the group. To connect another client to the group, that client must use the same group name. For example, if client A uses the group name "firstmesh", other clients that want to communicate with client A must also use the group name "firstmesh". If client B uses the group name "kite", it will connect successfully, but it will create a new group and won't be able to communicate with client A or anyone in the "firstmesh" group.
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" width="100%" height="100%" applicationComplete="OnApplicationComplete()">
<mx:Script>
<![CDATA[
private var netConnection:NetConnection = null;
private var netStream:NetStream = null;
private var netGroup:NetGroup = null;
private var video:Video = null;
private var sequenceNumber:uint = 0;
private var resizeTimer:Timer = null;
private const SERVER:String = "rtmfp://fms.example.com/someapp";
[Bindable] private var connected:Boolean = false;
[Bindable] private var joinedGroup:Boolean = false;
private function OnApplicationComplete():void
{
userName.text = "user " + int(Math.random() * 65536);
groupName.text = "channel" + (int(Math.random() * 899) + 101);
resizeTimer = new Timer(2000.0);
resizeTimer.addEventListener(TimerEvent.TIMER, DoResizeVideo);
resizeTimer.start();
}
private function StatusMessage(msg:Object):void
{
statusLog.text += msg;
statusLog.verticalScrollPosition = statusLog.textHeight;
statusLog.validateNow();
}
private function NetStatusHandler(e:NetStatusEvent):void
{
StatusMessage(e.info.code);
switch(e.info.code)
{
case "NetConnection.Connect.Success":
OnConnect();
break;
case "NetConnection.Connect.Closed":
case "NetConnection.Connect.Failed":
case "NetConnection.Connect.Rejected":
case "NetConnection.Connect.AppShutdown":
case "NetConnection.Connect.InvalidApp":
OnDisconnect();
break;
case "NetStream.Connect.Success": // e.info.stream
OnNetStreamConnect();
break;
case "NetStream.Connect.Rejected": // e.info.stream
case "NetStream.Connect.Failed": // e.info.stream
DoDisconnect();
break;
case "NetGroup.Connect.Success": // e.info.group
OnNetGroupConnect();
break;
case "NetGroup.Connect.Rejected": // e.info.group
case "NetGroup.Connect.Failed": // e.info.group
DoDisconnect();
break;
case "NetGroup.Posting.Notify": // e.info.message, e.info.messageID
OnPosting(e.info.message);
break;
case "NetStream.MulticastStream.Reset":
case "NetStream.Buffer.Full":
DoResizeVideo();
break;
case "NetGroup.SendTo.Notify": // e.info.message, e.info.from, e.info.fromLocal
case "NetGroup.LocalCoverage.Notify": //
case "NetGroup.Neighbor.Connect": // e.info.neighbor
case "NetGroup.Neighbor.Disconnect": // e.info.neighbor
case "NetGroup.MulticastStream.PublishNotify": // e.info.name
case "NetGroup.MulticastStream.UnpublishNotify": // e.info.name
case "NetGroup.Replication.Fetch.SendNotify": // e.info.index
case "NetGroup.Replication.Fetch.Failed": // e.info.index
case "NetGroup.Replication.Fetch.Result": // e.info.index, e.info.object
case "NetGroup.Replication.Request": // e.info.index, e.info.requestID
default:
break;
}
}
private function DoConnect():void
{
StatusMessage("Connecting to \"" + SERVER + "\" ...\n");
netConnection = new NetConnection();
netConnection.addEventListener(NetStatusEvent.NET_STATUS, NetStatusHandler);
netConnection.connect(SERVER);
}
private function OnConnect():void
{
var groupSpecifier:GroupSpecifier;
StatusMessage("Connected\n");
connected = true;
groupSpecifier = new GroupSpecifier("max2009lab/" + groupName.text);
groupSpecifier.multicastEnabled = true;
groupSpecifier.postingEnabled = true;
groupSpecifier.serverChannelEnabled = true;
netStream = new NetStream(netConnection, groupSpecifier.groupspecWithAuthorizations());
netStream.addEventListener(NetStatusEvent.NET_STATUS, NetStatusHandler);
netGroup = new NetGroup(netConnection, groupSpecifier.groupspecWithAuthorizations());
netGroup.addEventListener(NetStatusEvent.NET_STATUS, NetStatusHandler);
StatusMessage("Join \"" + groupSpecifier.groupspecWithAuthorizations() + "\"\n");
}
private function OnNetStreamConnect():void
{
netStream.client = this;
var mic:Microphone = Microphone.getMicrophone();
if(mic)
{
mic.codec = SoundCodec.SPEEX;
mic.setSilenceLevel(0);
netStream.attachAudio(mic);
StatusMessage("got microphone\n");
}
var camera:Camera = Camera.getCamera();
if(camera)
{
camera.setMode(320, 240, 10);
camera.setQuality(30000, 0);
camera.setKeyFrameInterval(15);
videoDisplay.attachCamera(camera);
videoDisplay.maintainAspectRatio = true;
netStream.attachCamera(camera);
StatusMessage("got camera\n");
}
netStream.publish("stream");
}
private function OnNetGroupConnect():void
{
joinedGroup = true;
}
private function DoDisconnect():void
{
if(netConnection)
netConnection.close();
videoDisplay.attachCamera(null);
}
private function OnDisconnect():void
{
StatusMessage("Disconnected\n");
netConnection = null;
netStream = null;
netGroup = null;
connected = false;
joinedGroup = false;
}
private function ClearChatText():void
{
chatText.text = "";
}
private function DoPost():void
{
var message:Object = new Object;
message.user = userName.text;
message.text = chatText.text;
message.sequence = sequenceNumber++;
message.sender = netConnection.nearID;
netGroup.post(message);
StatusMessage("==> " + chatText.text + "\n");
chatText.callLater(ClearChatText);
}
private function OnPosting(message:Object):void
{
StatusMessage("<" + message.user + "> " + message.text + "\n");
}
private function DoResizeVideo(ignored:* = null):void
{
if(video)
{
if( (0 == video.videoHeight)
|| (0 == video.videoWidth)
)
{
video.height = videoDisplay.height;
video.width = videoDisplay.width;
video.x = 0;
video.y = 0;
}
else
{
var videoAspect:Number = Number(video.videoWidth) / Number(video.videoHeight);
var displayAspect:Number = Number(videoDisplay.width) / Number(videoDisplay.height);
var adjustFactor:Number;
if(videoAspect >= displayAspect) // video is wider than display
{
adjustFactor = Number(video.videoWidth) / Number(videoDisplay.width);
video.width = videoDisplay.width;
video.height = int(Number(video.videoHeight) / adjustFactor);
video.x = 0;
video.y = int((videoDisplay.height - video.height) / 2);
}
else
{
adjustFactor = Number(video.videoHeight) / Number(videoDisplay.height);
video.height = videoDisplay.height;
video.width = int(Number(video.videoWidth) / adjustFactor);
video.x = int((videoDisplay.width - video.width) / 2);
video.y = 0;
}
}
}
}
public function onPlayStatus(info:Object):void {}
public function onMetaData(info:Object):void {}
public function onCuePoint(info:Object):void {}
public function onTextData(info:Object):void {}
public function ValidateConnectAllowed(isConnected:Boolean, groupNameText:String):Boolean
{
return (!isConnected) && (groupNameText.length > 0);
}
]]>
</mx:Script>
<mx:VBox top="10" right="10" left="10" bottom="10" verticalGap="6">
<mx:HBox width="100%">
<mx:Text text="Group:"/>
<mx:TextInput id="groupName" width="100%" text="default" enabled="{!connected}"/>
<mx:Button label="Connect" click="DoConnect()" enabled="{ValidateConnectAllowed(connected, groupName.text)}" />
<mx:Button label="Disconnect" click="DoDisconnect()" enabled="{connected}" />
</mx:HBox>
<mx:VideoDisplay id="videoDisplay" width="320" height="240" resize="DoResizeVideo()"/>
<mx:TextArea id="statusLog" width="100%" height="100%"/>
<mx:HBox width="100%">
<mx:TextInput id="userName" width="160" />
<mx:TextInput id="chatText" width="100%" enabled="{joinedGroup}" enter="DoPost()"/>
</mx:HBox>
</mx:VBox>
</mx:Application>
Wed Nov 21 2018, 06:34 AM -08:00