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Boes edited comment on GERONIMODEVTOOLS-608 at 4/1/10 8:25 AM:
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I attached two EAR's, HiThere.ear and HiThereSlow.ear. The only difference between the two EAR's is in the geronimo-application.xml. The HiThereSlow has dependencies to existing libraries in the Geronimo repository. HiThere does not have a depencies tag in it's geronimo-application.xml. Publishing of these EAR's shows that adding dependencies has great impact on the publishing speed. Turn on tracing and you see that the depencies tag is parsed more then a thousand times.

      was (Author: boes):
    I attached two EAR's, HiThere.ear and HiThereSlow.ear. The only difference between the two EAR's is in the geronimo-application.xml. The HiThereSlow has dependencies to existing libraries in the Geronimo repository. HiThere does not have a depencies tag in it's geronimo-application.xml. Publishing of these EAR's shows that adding dependencies has great impact on the publishing speed.
  
> Publish with GEP takes minutes, while deploy takes seconds
> ----------------------------------------------------------
>
>                 Key: GERONIMODEVTOOLS-608
>                 URL: https://issues.apache.org/jira/browse/GERONIMODEVTOOLS-608
>             Project: Geronimo-Devtools
>          Issue Type: Bug
>          Components: eclipse-plugin
>    Affects Versions: 2.2.0
>         Environment: GEP 2.2 installed in Eclipse (galileo-SR1).
>            Reporter: Boes
>            Assignee: Delos Dai
>         Attachments: getEnvironment.txt, HiThere.ear, HiThereSlow.ear, reorderModules.txt
>
>
> Publishing an Enterprise Application (EAR) with GEP to Geronimo takes much more time then deploying the same EAR to Geronimo using the console. See http://n3.nabble.com/Publish-with-GEP-takes-minutes-while-deploy-takes-10-seconds-td684484.html
> After doing some research I found that EAR's that have dependencies in geronimo-application.xml take a lot of time to publish. This is caused by the very inefficient implementation of the reorderModules method in the org.apache.geronimo.st.core.internal.DependencyHelper class.
> I installed a GEP development environment and put on tracing. It tested an EAR with 3 WAR's in it. In the EAR's geronimo-application.xml I added dependency tags for 4 libraries. Tracing shows that this results in parsing the geronimo-application.mxl 1092 (!) times. In code this means that a call to DependencyHelper.getEnvironment is made 1092 times.
> Another inefficient part in the reorderModules method is that the call to DeploymentUtils.isInstalledModule is repeatedly made for the same module. In the test I found it was called at least 3 times for each dependent library. These calls result in a request to Geronimo and take almost a second each.
> The best way to solve this bug is to redesign the reordering process and make it work in a way that both DependencyHelper.getEnvironment and DeploymentUtils.isInstalledModule are not called more often then needed. I wonder why DeploymentUtils.isInstalledModule is called at all.
> What I did to fix this problem and make GEP workable again for me is:
> - made sure the DeploymentUtils.isInstalledModule is never called twice for the same module. Once the DeploymentUtils.isInstalledModule is called for a certain module, I add this module to a list. Before a next call to DeploymentUtils.isInstalledModule I verify if the call has been made before. If so, it doesn't need to be called again.
> - reduced the number of times the xml is parsed. I put the results of the DependencyHelper.getEnvironment for a certain module in a hashmap. Next time the DependencyHelper.getEnvironment is called for the same module, I return the result stored in the hashmap.
> After these two modifications GEP is up to speed again.

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