Hi,
We made some investigations into passing collection of objects from a
flex client to red5-6.0 server. Here goes the results.
*Case 1:*
------------------------------------------------------------------------
Server code:
---------------
public void tryTVOWithLargeObejcts(TransferValueObject tvo){
System.out.println(tvo);
}
TransferValueObject class in Java
-------------------------------------------------------------------------------------------------------------------------
public void readExternal(IDataInput input)
{
ObjectMap map = (ObjectMap) input.readObject();
ObjectMap newmap = (ObjectMap) input.readObject();
log.debug(map+"::"+newmap);
//If you try the same thing with the following lines then also it
fails.
Object map = input.readObject();
Object newmap = input.readObject();
log.debug(map+"::"+newmap);
}
TransferValueObject(which is a remote object bound to
TransferValueObject in Java) [FLEX CLIENT code]
-----------------------------------------------------------------------------------------------------------------------------------------------------------
public function writeExternal(output:IDataOutput):void {
var ob:Object = new Object();
ob['first'] = 3243243;
ob['second'] = 3243243;
var innerObj:Object = new Object();
innerObj['first'] = 32432443;
innerObj['second'] = 324333243;
//This will fail in the server
output.writeObject(ob);
output.writeObject(innerObj);
//If you replace the above two lines with these, then also
the server will fail to read
ob['inner'] = innerObj;
output.writeObject(ob);
}
*Result :* java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
*Root cause :* org.red5.server.net.protocol.ProtocolException: Error
during decoding
If you continue doing this for 3-4 times, the decoding layer breaks in
the server as follows.
[ERROR] 141772 SocketAcceptorIoProcessor-0.0:(
org.red5.server.net.rtmp.codec.RTMPProtocolDecoder.error ) Error in
packet at 0
java.lang.NullPointerException
at
org.red5.server.net.rtmp.codec.RTMPProtocolDecoder.decodeHeader(RTMPProtocolDecoder.java:416)
*and the client is disconnected*
*Case 2: Editing the echotest.mxml to get the exception in the server.*
------------------------------------------------------------------------
Try the following the echotest.mxml file. See the server breaking as above.
// Add AMF3 specific tests below
var ext: ExternalizableClass = new ExternalizableClass();
var ext1: ExternalizableClass = new ExternalizableClass();
testParams.push(ext);
var tmp_1: Array = new Array();
tmp_1.push(ext);
//tmp_1.push(ext);
tmp_1.push(ext1);
testParams.push(tmp_1);
*Result :* java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
*Root cause : *[ERROR] 309608 SocketAcceptorIoProcessor-0.1:(
org.red5.server.net.rtmp.codec.RTMPProtocolDecoder.error ) Error in
packet at 0
java.lang.IllegalArgumentException
at java.nio.Buffer.limit(Unknown Source)
*Case 3: Some more possibilities to get into same errors
*
------------------------------------------------------------------------
I was trying with some more possibilities and here goes the results.
*Case 3.1. *
--------
- The client passes a HashMap (which extends Dictionary extends
Object) which contains custom objects
- The server receives a Object[]
Result : doesnt work
Exception : Buffer underflow
*Case 3.2. *
--------
- The client passes Array of custom objects
- The server receives ArrayList
Result:Doesn't work
Exception: IndexOutOfBounds
- The client has an HashMap and one of those parameters is a custom
object. It works!!. But not more than one custom object inside the HashMap.
This sounds like a restriction on passing custom objects. Great if any
of the code committers could address this ASAP.
Thanks a lot.
-Sri.
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