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Experiments some LWM2M over coap+tcp based on californium #1312

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Experiments some LWM2M over coap+tcp based on californium #1312

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sbernard31
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@sbernard31 sbernard31 commented Sep 14, 2022 •
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This is an experimental work based on #1318 #1323 and #1336 and not mature coap+tcp implementation of californium.
(it aims to implement #1047)

@sbernard31 sbernard31 changed the base branch from master to lwm2m_endpoint September 14, 2022 16:13
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@sbernard31 sbernard31 changed the base branch from lwm2m_endpoint to endpoint_client October 13, 2022 16:19
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I rebase this PR on new cleaner version of abstraction layer (#1318 , #1323)

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Sometime I face this kind of exception :

org.eclipse.leshan.core.request.exception.UnconnectedPeerException: Unable to send request coap://127.0.0.1:56124/3/0 : peer is not connected
	at org.eclipse.leshan.core.californium.DefaultExceptionTranslator.translate(DefaultExceptionTranslator.java:28)
	at org.eclipse.leshan.core.californium.CoapSyncRequestObserver.onSendError(CoapSyncRequestObserver.java:100)
	at org.eclipse.californium.core.coap.Message.setSendError(Message.java:1029)
	at org.eclipse.californium.core.coap.Request.setSendError(Request.java:1032)
	at org.eclipse.californium.core.network.CoapEndpoint$SendingCallback.onError(CoapEndpoint.java:1299)
	at org.eclipse.californium.elements.RawData.onError(RawData.java:314)
	at org.eclipse.californium.elements.tcp.netty.TcpServerConnector.send(TcpServerConnector.java:200)
	at org.eclipse.californium.core.network.CoapEndpoint$OutboxImpl.sendRequest(CoapEndpoint.java:924)
	at org.eclipse.californium.core.network.stack.BaseCoapStack$StackBottomAdapter.sendRequest(BaseCoapStack.java:231)
	at org.eclipse.californium.core.network.stack.AbstractLayer.sendRequest(AbstractLayer.java:69)
	at org.eclipse.californium.core.network.stack.BlockwiseLayer.sendRequest(BlockwiseLayer.java:498)
	at org.eclipse.californium.core.network.stack.TcpObserveLayer.sendRequest(TcpObserveLayer.java:57)
	at org.eclipse.californium.core.network.stack.AbstractLayer.sendRequest(AbstractLayer.java:69)
	at org.eclipse.californium.core.network.stack.TcpExchangeCleanupLayer.sendRequest(TcpExchangeCleanupLayer.java:45)
	at org.eclipse.californium.core.network.stack.BaseCoapStack$StackTopAdapter.sendRequest(BaseCoapStack.java:188)
	at org.eclipse.californium.core.network.stack.BaseCoapStack.sendRequest(BaseCoapStack.java:87)
	at org.eclipse.californium.core.network.CoapEndpoint$3.run(CoapEndpoint.java:701)
	at org.eclipse.californium.elements.util.SerialExecutor$1.run(SerialExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.eclipse.californium.elements.exception.EndpointUnconnectedException: TCP client not connected!
	... 15 common frames omitted

I didn't investigate yet.

@sbernard31 sbernard31 changed the base branch from endpoint_client to endpoint_bootstrap October 24, 2022 16:11
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About UnconnectedPeerException, my investigation at : eclipse-californium/californium#2081

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(The UnconnectedPeerException issue should be "fixed" in last commit in an acceptable way for an experimental feature : eclipse-californium/californium#2081 (comment))

@sbernard31 sbernard31 changed the base branch from endpoint_bootstrap to master January 26, 2023 16:27
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At least at short/mid term, there will not be more work on this (see #1047 (comment))
But we can keep the PR in case, one day someone succeed to add coap+tcp to Californium.

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