Derive template from rule

[Kristopher Kane <kk...@hortonworks.com>]

Hello,

In Contributor tests I'd like to derive the rewrite template from the
rule rather than hard coding.

Consider this:

WebHCatDeploymentContributor contributor = new WebHCatDeploymentContributor();
 UrlRewriteRulesDescriptor webhcatRules = contributor.loadRulesFromTemplate()

webhcatRules.getRule("WEBHCAT/webhcat/root/inbound").pattern().toString()
webhcatRules.getRule("WEBHCAT/webhcat/root/inbound").template().toString()

Both template and pattern methods return the pattern. At the end of
the day, I'd like to only have to know the rewrite rule name and then
derive both from the contributor. Is there a way to get the template
as well?

These come from UrlRewriteRuleDescriptorImpl.

Thanks,

Kris

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Re: Derive template from rule

[Kevin Minder <ke...@hortonworks.com>]

Kris,

This isn't as simple as it seems.  The <rule/> element can contain a 
rather complex set of nested elements.  Consider a rule like this from 
gateway-provider-rewrite/src/test/resources/org/apache/hadoop/gateway/filter/rewrite/api/UrlRewriteProcessorTest/rewrite.xml

     <rule name="test-rule-with-complex-flow" flow="OR">
         <match pattern="*://*:*/~/{path=**}?{**}">
             <rewrite 
template="test-scheme-output://test-host-output:777/test-path-output/test-home/{path}?{**}"/>
         </match>
         <match pattern="*://*:*/{path=**}?{**}">
             <rewrite 
template="test-scheme-output://test-host-output:42/test-path-output/{path}?{**}"/>
         </match>
     </rule>

So the .pattern() and .template() are really the same thing.  The 
.pattern() is just the string version and the .template() is the 
"complied" version.  Note that .pattern() is already a String so 
.pattern().toString() is redundant.

Kevin.

On 10/17/14, 4:15 PM, Kristopher Kane wrote:
> Hello,
>
> In Contributor tests I'd like to derive the rewrite template from the
> rule rather than hard coding.
>
> Consider this:
>
> WebHCatDeploymentContributor contributor = new WebHCatDeploymentContributor();
>   UrlRewriteRulesDescriptor webhcatRules = contributor.loadRulesFromTemplate()
>
> webhcatRules.getRule("WEBHCAT/webhcat/root/inbound").pattern().toString()
> webhcatRules.getRule("WEBHCAT/webhcat/root/inbound").template().toString()
>
> Both template and pattern methods return the pattern. At the end of
> the day, I'd like to only have to know the rewrite rule name and then
> derive both from the contributor. Is there a way to get the template
> as well?
>
> These come from UrlRewriteRuleDescriptorImpl.
>
> Thanks,
>
> Kris
>


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