Another stab in the dark. The double quotes mean the individual hostnames
are GStrings instead of Strings. Maybe starting this way:
def hostnames = ['192.168.0.1', '192.168.0.2']
On Monday, February 9, 2015 at 9:25:52 AM UTC-8, Brian Ray wrote:
>
> Hi Robin,
>
> The simplest Groovy idiom for iterating over a collection is
>
> hostnames.each { host ->
> do something interesting with host ...
> }
>
>
>
> Does this work?
>
> Brian
>
> On Monday, February 9, 2015 at 5:48:11 AM UTC-8, Robin Tegg wrote:
>>
>> Hi all,
>>
>> I've been trying out the workflow plugin after watching the
>> pimp-your-continuous-delivery-pipeline-with-jenkins-workflow-wjax-14
>> <http://www.slideshare.net/cloudbees/pimp-your-continuous-delivery-pipeline-with-jenkins-workflow-wjax-14>
>> demo.
>> And in one of the slides (24), there is an example of a for loop that looks
>> to iterate over a list of hostnames. I've assumed that hostnames is a list
>>
>> def hostnames = ["192.168.0.1", "192.168.0.2"]
>> for( def hostname: hostnames ) {
>> sh "ssh ${hostname} ..."
>> }
>>
>> I'm wondering if anyone can help with my usage of arrays/lists. I'm
>> getting the following errors when I try the above:
>>
>> java.io.NotSerializableException: java.util.AbstractList$Itr
>>
>>
>> Now I understand from the docs
>> (https://github.com/jenkinsci/workflow-plugin/blob/master/TUTORIAL.md#serialization-of-local-variables)
>> that some variables can't be serialized before a "sh" step might happen,
>> but as I'm new to groovy I'm struggling to understand how the above might be
>> achieved. I've tried in a method and inline as suggested.
>>
>>
>> The workaround I have at the moment is
>>
>>
>> def hostnames = ["192.168.0.1", "192.168.0.2"]
>> for( int i = 0; i < hostnames.size(); i++) {
>> sh "ssh ${hostnames.get(i)} ..."
>> }
>>
>> Any pointers would be much appreciated
>>
>> Thanks
>> Robin
>>
>
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