Tiamat

Tiamat is the Stop Place Register. It is used nationally in Norway, and other places. Tiamat is created with technologies like Spring Boot, Hibernate, Postgis, Jersey and Jackson.

Core functionality

NeTEx imports

• Supports different pre steps and merging options for stop places, handling bad data quality.
• Assigns unique IDs to stop places (if desired).
• Validates incoming data against the XML schema.

NeTEx exports

Supports exporting stop places and other entities to the http://netex-cen.eu/ format. There are many options for exports:

• Asynchronous exports to google cloud storage. Asynchronous exports handles large amount of data, even if exporting thousands of stop places.
• Synchronous exports directly returned
• Several export parameters and filtering (ex: query or administrative polygons filtering)
• Exports can be validated against the NeTEx schema, ensuring quality.

GraphQL API

Tiamat provides a rich GraphQL API for stop places, topographic places, path links, tariff zones and so on, support the same parameters as the NeTEx export API. It also supports mutations. So you can update or create entities. There are also graphql processes (named functions) which allows functionality like merging quays or stop places.

A ReactJS Frontend

A frontend for Tiamat is available. It's name is Abzu. See https://github.com/entur/abzu

Supports running multiple instances

Tiamat uses Hazelcast memory grid to communicate with other instances in kubernetes. This means that you can run multiple instances.

Mapping of IDs

After import stop places and assigning new IDs to stop places, tiamat keeps olds IDs in a mapping table. The mapping table between old and new IDs is available through the GraphQL API and a REST endpoint.

Automatic topographic place and tariff zone lookup

Tiamat supports looking up and populating references to tariff zones and topographic places from polygon matches when saving a stop place.

Versioning

Stop places and other entities are versioned. This means that you have full version history of stop places and what person that made those changes. Tiamat also includes a diff tool. This is used to compare and show the difference between two versions of a stop place (or other entity).

Build

mvn clean install

You need the directory /deployments/data with rights for the user who performs the build.

Integration tests

Tiamat uses testcontainers to run integration tests against a real database. To run Testcontainers-based tests, you need a Docker-API compatible container runtime for more detail see https://www.testcontainers.org/supported_docker_environment/

(default profiles are set in application.properties)

Running the service

There are several options for running the service depending on what you need.

• Run locally for development is for people intending to maintain, modify and improve tiamat's source code
• Run tiamat with Docker compose if you just need to get the service running
• Run with external properties file and PostgreSQL for low level debugging

Note! Each of these configurations use unique port numbers and such, be sure to read the provided documentation and configuration files for more details.

Run locally for development

Local development is a combination of using Docker Compose based configuration for starting up the supporting services and running Spring Boot with at least local profile enabled.

When running,

• tiamat will be available at http://localhost:37888
• PostGIS will be available at localhost:37432

1. Start Local Environment through Docker Compose

Tiamat has docker-compose.yml which contains all necessary dependent services for running tiamat in various configurations. It is assumed this environment is always running when the service is being run locally (see below).

Note! This uses the compose version included with modern versions of Docker, not the separately installable docker-compose command.

All Docker Compose commands run in relation to the docker-compose.yml file located in the same directory in which the command is executed.

# run with defaults - use ^C to shutdown containers
docker compose up
# run with additional profiles, e.g. with LocalStack based AWS simulator
docker compose --profile aws up
# run in background
docker compose up -d # or --detach
# shutdown containers
docker compose down
# shutdown containers included in specific profile
docker compose --profile aws down

See Docker Compose reference for more details.

2. Run the Service

Available Profiles

Note! You must choose at least one of the options from each category below!

Note! local profile must always be included!

Storage

profile	description
gcs-blobstore	GCP GCS implementation of tiamat's blob storage
local-blobstore	Use local directory as backing storage location.

Changelog

profile	description
local-changelog	Simple local implementation which logs the sent events to stdout
activemq	JMS based ActiveMQ implementation.
google-pubsub	GCP PubSub implementation for publishing tiamat entity changes.

Run It!

IntelliJ: Right-click on TiamatApplication.java and choose Run (or Cmd+Shift+F10). Open Run -> Edit configurations, choose the correct configuration (Spring Boot -> App), and add a comma separated list of desired profiles (e.g. local,local-blobstore,activemq) to Active profiles. Save the configuration.

Command line: mvn spring-boot:run

Run tiamat with Docker compose

To run Tiamat with Docker compose, you need to have a docker-compose.yml file. In docker-compose folder you will find a compose.yml file.:

docker compose up

This will start Tiamat with PostgreSQL and Hazelcast. and you can access Tiamat on http://localhost:1888 and the database on http://localhost:5433 and graphiql on http://localhost:8777/services/stop_places/graphql , At start up tiamat copy empty schema to the database. Spring properties are set in application.properties. Security is disabled in this setup.

Run with external properties file and PostgreSQL

To run with PostgreSQL you need an external application.properties. Below is an example of application.properties:

spring.jpa.database=POSTGRESQL
spring.datasource.platform=postgres
spring.jpa.properties.hibernate.hbm2ddl.import_files_sql_extractor=org.hibernate.tool.hbm2ddl.MultipleLinesSqlCommandExtractor
spring.jpa.hibernate.hbm2ddl.import_files_sql_extractor=org.hibernate.tool.hbm2ddl.MultipleLinesSqlCommandExtractor
spring.jpa.hibernate.ddl-auto=none

spring.http.gzip.enabled=true

#spring.jpa.properties.hibernate.format_sql=true

spring.jpa.properties.hibernate.order_updates=true
spring.jpa.properties.hibernate.batch_versioned_data=true

spring.flyway.enabled=true
spring.flyway.table=schema_version

server.compression.mime-types=application/json,application/xml,text/html,text/xml,text/plain

spring.jpa.hibernate.id.new_generator_mappings=true
spring.jpa.hibernate.use-new-id-generator-mappings=true
spring.jpa.properties.hibernate.cache.use_second_level_cache=false
spring.jpa.properties.hibernate.cache.use_query_cache=false
spring.jpa.properties.hibernate.cache.use_minimal_puts=false
spring.jpa.properties.hibernate.cache.region.factory_class=org.rutebanken.tiamat.hazelcast.TiamatHazelcastCacheRegionFactory

netex.import.enabled.types=MERGE,INITIAL,ID_MATCH,MATCH

hazelcast.performance.monitoring.enabled=true
hazelcast.performance.monitoring.delay.seconds=2

management.endpoints.web.exposure.include=info,env,metrics
management.endpoints.prometheus.enabled=true
management.metrics.endpoint.export.prometheus.enabled=true

spring.jpa.properties.hibernate.jdbc.batch_size=20
spring.jpa.properties.hibernate.default_batch_fetch_size=16
spring.jpa.properties.hibernate.generate_statistics=false

changelog.publish.enabled=false

jettyMaxThreads=10
jettyMinThreads=1

spring.datasource.hikari.maximumPoolSize=40
spring.datasource.hikari.leakDetectionThreshold=30000

tiamat.locals.language.default=eng

tariffZoneLookupService.resetReferences=true

debug=true

# Disable feature detection by this undocumented parameter. Check the org.hibernate.engine.jdbc.internal.JdbcServiceImpl.configure method for more details.
spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults = false

# Because detection is disabled you have to set correct dialect by hand.
spring.jpa.database-platform=org.hibernate.dialect.PostgreSQL9Dialect

tariffzoneLookupService.resetReferences=true

spring.jpa.properties.hibernate.dialect=org.hibernate.spatial.dialect.postgis.PostgisDialect

spring.database.driverClassName=org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://localhost:5436/tiamat
spring.datasource.username=tiamat
spring.datasource.password=tiamat

#OAuth2 Resource Server
spring.security.oauth2.resourceserver.jwt.issuer-uri=https:http://localhost:8082/realms/entur
tiamat.oauth2.resourceserver.auth0.ror.jwt.audience=abzu
tiamat.oauth2.resourceserver.auth0.ror.claim.namespace=role_assignments

spring.cloud.gcp.pubsub.enabled=false

aspect.enabled=true

netex.id.valid.prefix.list={TopographicPlace:{'KVE','WOF','OSM','ENT','LAN'},TariffZone:{'*'},FareZone:{'*'},GroupOfTariffZones:{'*'}}

server.port=1888

blobstore.gcs.blob.path=exports
blobstore.gcs.bucket.name=tiamat-test
blobstore.gcs.credential.path=gcloud-storage.json
blobstore.gcs.project.id=carbon-1287

security.basic.enabled=false
management.security.enabled=false
authorization.enabled = true
rutebanken.kubernetes.enabled=false

async.export.path=/tmp

publicationDeliveryUnmarshaller.validateAgainstSchema=false
publicationDeliveryStreamingOutput.validateAgainstSchema=false
netex.validPrefix=NSR
netex.profile.version=1.12:NO-NeTEx-stops:1.4
blobstore.local.folder=/tmp/local-gcs-storage/tiamat/export
spring.profiles.active=local-blobstore,activemq

To start Tiamat with this configuration, specify spring.config.location:

java -jar -Dspring.config.location=/path/to/tiamat.properties --add-opens java.base/java.lang=ALL-UNNAMED -Denv=dev tiamat-0.0.2-SNAPSHOT.jar

Database

HikariCP

Tiamat is using HikariCP. Most properties should be be possible to be specified in in application.properties, like spring.datasource.initializationFailFast=false. More information here. https://github.com/brettwooldridge/HikariCP/wiki/Configuration See also http://stackoverflow.com/a/26514779

ID Generation

Background

During the implementation of Tiamat was desirable to produce NeTEx IDs for stop places more or less gap less. The reason for this implementation was legacy systems with restrictions of maximum number of digits.

Configure ID generation

It is possible to control whether IDs should be generated outside Tiamat or not. See the class ValidPrefixList. Setting the property netex.validPrefix tells Tiamat to generate IDs for new entities. Please note that it is not possible to do an initial import (see ImportType) multiple times with the same IDs.

How its all connected

It's all initiated by an entity listener annotated with PrePersist on the class IdentifiedEntity called IdentifiedEntityListener. NetexIdAssigner determines if the entity already has an ID or not. NetexIdProvider either return a new ID or handles explicity claimed IDs if the configured prefix matches. See ValidPrefixList for the configuration of valid prefixes, and prefixes for IDs generated elsewhere. The GaplessIdGeneratorService uses Hazelcast to sync state between instances and avoid conflicts.

Keycloak/Auth0

Both Tiamat and Abzu are set up to be used with Keycloak or Auth0. A detailed guide on how to setup Keycloak can be found here.

Validation for incoming and outgoing NeTEx publication delivery

It is possible to configure if tiamat should validate incoming and outgoing NeTEx xml when unmarshalling or marshalling publication deliveries. Default values are true. Can be deactivated with setting properties to false.

publicationDeliveryStreamingOutput.validateAgainstSchema=false
publicationDeliveryUnmarshaller.validateAgainstSchema=true

Synchronous NeTEx export with query params

It is possible to export stop places and topographic places directly to NeTEx format. This is the endpoint: https://api.dev.entur.io/stop-places/v1/netex

Query by name example:

GET https://api.dev.entur.io/stop-places/v1/netex?q=Arne%20Garborgs%20vei

Query by ids that contains the number 3115

GET https://api.dev.entur.io/stop-places/v1/netex?q=3115

Query by stop place type

GET https://api.dev.entur.io/stop-places/v1/netex?stopPlaceType=RAIL_STATION

It is also possible with multiple types.

Query by municipality ID

GET https://api.dev.entur.io/stop-places/v1/netex?municipalityReference=KVE:TopographicPlace:1003

Query by county ID

GET https://api.dev.entur.io/stop-places/v1/netex?countyReference=KVE:TopographicPlace:11

Limit size of results

GET https://api.dev.entur.io/stop-places/v1/netex?size=1000

Page

GET https://api.dev.entur.io/stop-places/v1/netex?page=1

ID list

You can specify a list of NSR stop place IDs to return

GET https://api.dev.entur.io/stop-places/v1/netex?idList=NSR:StopPlace:3378&idList=NSR:StopPlace:123

All Versions

allVersions. Acceptable values are true or false. If set to true, all versions of matching stop places will be returned. If set to false, the highest version by number will be returned for matching stop places. This parameter is not enabled when using the version valitity parmaeter.

Stop places without location

Match only stop places without location Use the parameter: withoutLocationOnly=true

Topographic export mode

The parameter topographicPlaceExportMode can be set to NONE, RELEVANT or ALL Relevant topographic places will be found from the exported list of stop places.

Tariff Zone export mode

The parameter tariffZoneExportMode can be set to NONE, RELEVANT or ALL Relevant tariff zones with be found from the exported list of stop places. Because stop places can have a list of tariff zone refs.

Group of stop places export mode

The parameter groupOfStopPlacesExportMode can be set to NONE, RELEVANT or ALL Relevant group of stop places can be found from the exported list of stop places.

Version validity

The versionValidity parameter controls what stop places to return.

• ALL: returns all stops in any version (See allVersions attribute), regardless of version validity
• CURRENT: returns only stop place versions valid at the current time
• FUTURE_CURRENT: returns only stop place versions valid at the current time, as well as versions valid in the future.

Example

https://api.dev.entur.io/stop-places/v1/netex?tariffZoneExportMode=RELEVANT&topographicPlaceExportMode=RELEVANT&groupOfStopPlacesExportMode=NONE&q=Nesbru&versionValidity=CURRENT&municipalityReference=KVE:TopographicPlace:0220

Returns stop places with current version validity now, matching the query 'Nesbru' and exists in municipality 0220. Fetches relevant tariff zones and topographic places.

Async NeTEx export from Tiamat

Asynchronous export uploads exported data to google cloud storage. When initiated, you will get a job ID back. When the job is finished, you can download the exported data.

Most of the parameters from synchronous export works with asynchronous export as well!

Start async export:

curl https://api.dev.entur.io/stop-places/v1/netex/export/initiate

Pro tip: Pipe the output from curl to xmllint to format the output:

curl https://api.dev.entur.io/stop-places/v1/netex/export/initiate | xmllint --format -

Check job status:

curl https://api.dev.entur.io/stop-places/v1/netex/export

When job is done. Download it:

curl https://api.dev.entur.io/stop-places/v1/netex/export/130116/content | zcat | xmllint --format - > export.xml

See also https://rutebanken.atlassian.net/browse/NRP-924

Truncate data in tiamat database

Clean existing data in postgresql (streamline if frequently used):

TRUNCATE stop_place CASCADE;
TRUNCATE quay CASCADE;
TRUNCATE topographic_place CASCADE;

Import data into Tiamat

If you are running this from spring:run, then you need to make sure that you have enough memory available for the java process (in case of large data sets). Another issue is thread stack size, which might need to be increased when coping with really large NeTEx imports. Example:

export MAVEN_OPTS='-Xms256m -Xmx1712m -Xss256m -XX:NewSize=64m -XX:MaxNewSize=128m -Dfile.encoding=UTF-8'

Import NeTEx file without NSR IDs

This NeTEx file should not contain NSR ID. (The NSR prefix is configurable in the class ValidPrefixList)

• Tiamat will match existing stops based on name and coordinates.
• Tiamat will merge Quays inside stops that are close, have the same original ID and does not have too different compass bearing.

Tiamat will return the modified NeTEx structure with it's own NSR IDs. Original IDs will be present in key value list on each object.

curl -XPOST -H"Content-Type: application/xml" -d@my-nice-netex-file.xml http://localhost:1997/services/stop_places/netex

Importing with importType=INITIAL

When importing with importType=INITIAL, a parallel stream will be created, spawning the original process. During import, user authorizations is checked, thus accessing SecurityContextHolder. By default, SecurityContextHolder use DEFAULT_LOCAL_STRATEGY. When using INITIAL importType, you should tell Spring to use MODE_INHERITABLETHREADLOCAL for SecurityContextHolder, allowing Spring to duplicate Security Context in spawned threads. This can be done setting env variable :

-Dspring.security.strategy=MODE_INHERITABLETHREADLOCAL

If not, the application may complain about user not being authenticated if Spring tries to check authorization in a spawned process

GraphQL

GraphQL endpoint is available on

https://api.dev.entur.io/stop-places/v1/graphql

Tip: GraphiQL UI available on https://api.dev.entur.io/graphql-explorer/stop-places using GraphiQL: https://github.com/graphql/graphiql (Use e.g. Modify Headers for Chrome to add bearer-token for mutations)

Flyway

To create the database for tiamat, download and use the flyway command line tool: https://flywaydb.org/documentation/commandline/

Migrations

Migrations are executed when tiamat is started.

Schema changes

Create a new file according to the flyway documentation in the folder resources/db/migrations. Commit the migration together with code changes that requires this schema change. Follow the naming convention.

Tiamat scripts

Various queries and scripts related to tiamat, has been collected here: https://github.com/entur/tiamat-scripts

CircleCI

Tiamat is built using CircleCI. See the .circleci folder.