compiling error

[fatemehm]

Hey, I am trying to compile and run CloudSimSDN on my machine but I've faced this error:
java:128: error: incompatible types: Collection cannot be converted to Collection<? extends SDNHost>
hg.hosts = new ArrayList((Collection<? extends SDNHost>)topology.getConnectedNodesLow(e));
^
1 error
unfortunately, I couldn't figure out the error. I should run this as soon as possible.

[sandinojardim]

Hi, @fatemehm

Did you solve this problem?

[fatemehm]

Hi @sandinojardim
Unfortunately, I couldn't run and compile the new version :( if you could figure out the problem, please let me know

[sandinojardim]

There is a pull request with a bug fix suggestion:

hg.hosts = new ArrayList<SDNHost>((Collection<? extends SDNHost>) (Collection<? extends Node>)topology.getConnectedNodesLow(e));

I replaced that line by the above suggestion and worked for me.

[davidperezabreu]

Hi there!

@sandinojardim is right! The problem is related with the casting! That kind of casting using the wildcard operator could be a little tricky. You also can use something like this:

hg.hosts = new ArrayList<SDNHost>((Collection<? extends SDNHost>)(Collection<?>)topology.getConnectedNodesLow(e));

Cheers,

[fatemehm]

@sandinojardim thanks you very much, let me check this :) I hope it works for me too.

[fatemehm]

@davidperezabreu Thanks, actually I'm new in CloudsimSDN and java programming. I need to extend this framework in order to support NFV ( Network function virtualization) and SFCs ( service function chaining) but I don't know exactly which of the packages I have to extend.

[anyanteh]

hello i'm trying to setup the cloudsimsdn v.2 but i appears this method "getCloudletFailedList()" is not available in the package org.cloudbus.cloudsim.sdn

[anyanteh]

can i have help with to fix this problem please

[anyanteh]

is there another version of the cloudsim 3.0.3 jar file please that implements "getCloudletFailedList()"??

[fatemehm]

Hi @anyanteh
I've faced the same problem. could you figure out the problem? you can find cloudsim4.0 in this link : https://github.com/Cloudslab/cloudsim/releases/tag/cloudsim-4.0

[fatemehm]

@anyanteh
It works with "cloudsim-4.0.jar" . You have to put this Jar file in the Jar folder.

[anyanteh]

thanks for your feedback,just tried it but its still doesn't work.Is there any particular thing u did aside setting up cloudsim v.4 cloudsim sdn v.2 and adding the maven dependencies, please??

[fatemehm]

@anyanteh try to compile all of the folders one by one. actually, I could not run the example, because of some problem in the vmallocation folder, I altered "getFreeMips().add(host.getTotalMips());" (line 65 in the VmAllocationPolicyCombinedMostFullFirst.java) to "getFreeMips().add((long)host.getTotalMips());" .
Then try to run with this ( in Linux) : java -cp jars/*:. org/cloudbus/cloudsim/sdn/example/SimpleExample LFF dataset-energy/energy-physical.json dataset-energy/energy-virtual.json dataset-energy/energy-workload.csv > results.out

[anyanteh]

@ fatemehm, thank u so much for your help.

You were right. I reproduced the compile error with 3.0.3.
When I brought in 4.0, the compile issue went away.
This is bad ... to deliver a code repository containing an incorrect version number in the pom.xml file. I just did not want to believe it.

[anyanteh]

@fatemehm
regarding the example, i think the project (CLoudsimSDN v.2.0) was updated on 14th of February and a these files might be available for use.
you might want to give that shot
Cheers