mod-agreements

Copyright (C) 2018-2022 The Open Library Foundation

This software is distributed under the terms of the Apache License, Version 2.0. See the file "LICENSE" for more information.

Introduction - developers looking to enhance the resources that mod-agreements provides

Mod-Agreements is a FOLIO module to manage agreements which control an institutions access to resources. Normally, this will be subscribed access to packages of electronic resources, although the aim is to make the affordances offered by mod-agreements as general as possible.

Mod-Agreements can create agreements that control access to content bundled into packages and defined in knowledgebase systems, it can identify specific electronic or print resources, and act as a bridge between those resources and associated licenses and purchase documents.

Developers looking to access the services exposed by mod-agreements can find more information in the following sections

Module installation and upgrade notes

The module has important dependences on reference data. initial installations and module upgrades should specify loadReference=true. The module may not work as expected if this is omitted.

While this README and the module description template offer some guidance on how to run this module and the resourcing required, it is not possible to anticipate all possible environmental configurations and deployment processes. Determining the exact resourcing, deployment processes and other aspects such as the size of database conneciton pools needed in any particular environment is down to those running the module and it is recommended that all such practices are fully documented by those responsible

Locks and failure to upgrade

This module has a few "problem" scenarios that shouldn't occur in general operation, but particular approaches to upgrades in particular can leave the module unable to self right. This occurs especially often where the module or container die/are killed regularly shortly after/during the upgrade.

In order of importance to check:

• CPU resource
  • In the past we have had these particular issues reported commonly where the app was not getting enough CPU resources to run. Please ensure that the CPU resources being allocated to the application are sufficient, see the requisite module requirements for the version running (Ramsons example matrix)
• Liquibase
  • The module uses liquibase in order to facilitate module data migrations
  • Unfortunately this has a weakness to shutdown mid migration.
  • Check <tenantName>_mod_agreements.tenant_changelog_lock does not have locked set to true
    • If it does, the migration (and hence the upgrade itself) have failed, and it is difficult to extricate the module from this scenario.
    • It may be most prudent to revert the data and retry the upgrade.
  • In general, while the module is uploading it is most likely to succeed if after startup and tenant enabling/upgrading through okapi that the module and its container are NOT KILLED for at least 2 minutes.
  • An addition, a death to the module while upgrading could be due to a lack of reasonable resourcing making it to the module
• Federated changelog lock
  • The module also has a manual lock which is managed by the application itself.
  • This is to facilitate multiple instances accessing the same data
  • In particular, this lock table "seeds" every 20 minutes or so, and a death in the middle of this can lock up the application (Although it can sometimes self right from here)
  • If the liquibase lock is clear, first try startup and leaving for a good 20 minutes
    • If the module dies it's likely resourcing that's the issue
    • The module may be able to self right
  • If the module cannot self right
    • Check the mod_agreements_system.system_changelog_lock
      • The same applies from the above section as this is a liquibase lock, but this is seriously unlikely to get caught as the table is so small
    • Finally check the mod_agreements_system.federation_lock
      • If this table has entries, this can prevent the module from any and all operations
      • It should self right from here, even if pointing at dead instances
        • See mod_agreements_system.app_instance for a table of instance ids, a killed and restarted module should eventually get cleared from here.
        • It is NOT RECOMMENDED to clear app_instances manually
      • If there are entries in the federated lock table that do not clear after 20 minutes of uninterrupted running then this table should be manually emptied.

Resources exposed by this module

/erm/sas resource - SubscriptionAgreements

The /erm/sas resource allows module clients to Create, Retrieve, Update and Delete SubscriptionAgreement entities, and to search for SAs. See the documentation

/erm/refdataValues

This resource allows module owners to obtain tenant extensible lists of controlled values. The URL pattern is "/erm/refdataValues/$domain/$property"

As of 2019-02-20 the following are defined:

Refdata Category	URL for values
TitleInstance.SubType	/erm/refdataValues/TitleInstance/SubType
TitleInstance.Type	/erm/refdataValues/TitleInstance/Type
InternalContact.Role	/erm/refdataValues/InternalContact/Role
SubscriptionAgreementOrg.Role	/erm/refdataValues/SubscriptionAgreementOrg/Role
SubscriptionAgreement.AgreementType	/erm/refdataValues/SubscriptionAgreement/AgreementType
SubscriptionAgreement.RenewalPriority	/erm/refdataValues/SubscriptionAgreement/RenewalPriority
Global.Yes_No	/erm/refdataValues/Global/Yes_No
SubscriptionAgreement.AgreementStatus	/erm/refdataValues/SubscriptionAgreement/AgreementStatus
Pkg.Type	/erm/refdataValues/Pkg/Type
IdentifierOccurrence.Status	/erm/refdataValues/IdentifierOccurrence/Status

ModuleDescriptor

https://github.com/folio-org/mod-agreements/blob/master/service/src/main/okapi/ModuleDescriptor-template.json

For module developers looking to extend or modify the resources presented by this module

This is the main starter repository for the Grails-based OLF - ERM backend modules.

• Getting started

There are a couple of differing ways to run this module as a developer, either via the (now defunct) vagrant images, or directly against an internal postgres via docker compose.

Longer term there may be official rancher environments offered for dev, but our current workflow does not include those.

Additional information

Issue tracker

See project ERM at the FOLIO issue tracker.

Other documentation

Other modules are described, with further FOLIO Developer documentation at dev.folio.org

Docker compose

This is the current recommended way to develop against this module, with a couple of key caveats. This setup runs the module standalone, without the okapi layer or the rest of FOLIO. Obviously this prevents full testing and development of permission based issues or any app interaction, but is sufficient for developing anything internal to the module.

Setup

The devloper will need docker compose, which should now be included in relatively new versions of docker. If not, either look to update docker or install the compatible standalone docker-compose. (Note that this will change the necessary commands later from docker compose to docker-compose)

Run command

First ensure that the postgres is up and running, by navigating to mod-agreements/tools/testing and running

docker compose up

Then navigate in a separate terminal to mod-agreements/service and run with the dc profile

./gradlew -Dgrails.env=dc bootRun

This will run the module on port 8080, and it can be directly curled to on that port without having to pass through an okapi layer.

Vagrant

Using the now defunct vagrant images for snapshot allows for a full FOLIO system running in a virtual machine. This is highly costly resource-wise, and the lack of up to date images creates issues for development. However it is listed below for posterity.

Run command

./gradlew -Dgrails.env=vagrant-db bootRun

Initial Setup

Most developers will run some variant of the following commands the first time through

In window #1

Start the vagrant image up from the project root

vagrant destroy
vagrant up

Sometimes okapi does not start cleanly in the vagrant image - you can check this with

vagrant ssh

then once logged in

docker ps

should list running images - if no processes are listed, you will need to restart okapi (In the vagrant image) with

sudo su - root
service okapi stop
service okapi start

Finish the part off with

tail -f /var/log/folio/okapi/okapi.log

In window #2

Build and run mod-agreements stand alone

cd service
grails war
../scripts/run_external_reg.sh

In window #3

Register the module and load some test data

cd scripts ./register_and_enable.sh ./dev_submit_pkg.sh ./dev_trigger_kb_sync.sh

In window #4

Run up a stripes platform containing erm

See UI Agreements quick start

This section is run in a local setup, not from any particular checked out project, YMMV

cd ../platform/stripes/platform-erm
stripes serve ./stripes.config.js --has-all-perms

You should get back

Waiting for webpack to build... Listening at http://localhost:3000

and then be able to access the app

Kubernetes Deployment Notes

You may need to set OKAPI_SERVICE_PORT and/or OKAPI_SERVICE_HOST on the mod-agreements container.

If you create a Service in Kubernetes named "okapi" and expose a port for Hazelcast and a port for HTTP; the Hazelcast port might be the default and mod-agreements will use that default.

Validating module descriptor

There is a github action created to run the module descriptor validation on push, but if a developer wishes to run the validation locally there is some setup that needs doing. The validation script is a Maven plugin which does not work natively with our gradle based apps.

Maven

Developer will need maven cli mvn installed on their machine.

settings.xml

Create a settings.xml file within the "service" directory (DO NOT MERGE THIS) containing the following:

<settings>
  <profiles>
    <profile>
      <id>folioMavenProfile</id>
      <pluginRepositories>
        <pluginRepository>
          <id>folio-nexus</id>
          <name>FOLIO Maven repository</name>
          <url>https://repository.folio.org/repository/maven-folio</url>
        </pluginRepository>
      </pluginRepositories>
    </profile>
  </profiles>
  <activeProfiles>
    <activeProfile>folioMavenProfile</activeProfile>
  </activeProfiles>
</settings>

Running

Finally the developer can run this command from the root directory (ie mod-agreements not mod-agreements/service)

mvn org.folio:folio-module-descriptor-validator:1.0.0:validate -DmoduleDescriptorFile=service/src/main/okapi/ModuleDescriptor-template.json -s service/settings.xml -l validate_module_descriptor_output.txt

This will create a file called validate_module_descriptor_output.txt containing the output of the validator. The github action does some cleanup and comments the errors on a PR (if present). The grep/sed commands with regex can be found in the workflow file .github/validate-module.