You are viewing the documentation for Blueriq 15. Documentation for other versions is available in our documentation directory.

This component was introduced in Blueriq 14.6. Before Blueriq 14.6, this component was a part of the Trace SQL Store component.


Table of contents 

Description

This Timeline SQL Store Component contains a Timeline DAO implementation that can be used by the trace engine to store timeline messages in a database.

Blueriq 14.8 introduced the possibility to consume timeline events that are pushed on a queue by the Timeline Event Publisher Component and then store them in a database in an asynchronous way. See consume timeline events.

Requirements

This component persists data in a database, that must be provided. See platform support for the supported databases.

Installation

In order to use this component, the timeline-sql-store profile must be active. More information on how to configure the application using Spring Profiles can be found here: Component configuration with Spring Profiles.

Add the artifact with groupId com.blueriq and artifactId blueriq-component-timeline-sql-store as a dependency to your Blueriq runtime POM file if you want to depend on it.

Configuration

Database

Scripts to create the required database content are provided for the following databases:

  • SQL Server
  • Oracle
  • H2 (we do not recommend using a H2 database in production environments)


For customers that are upgrading an existing version of Blueriq, database upgrade scripts are provided in the Upgrade instructions when applicable.

Please make sure the timeline-sql-store has a separate datasource. Using the same datasource for other components is known to cause errors.


Use the following steps to configure the datasource:

  1. If necessary, create a new datasource. See Configuring JDBC database drivers for information on how to do this.
  2. Timeline SQL Store component is using the timeline-sql-store datasource to store data. The timeline-sql-store datasource can be configured using JDBC or JNDI.

    1. Using JDBC datasource: this can be configured in the application-externaldatasources.properties file. When configuring external datasources, the externaldatasources profile should be enabled.

      Example application-externaldatasources.properties
      blueriq.datasource.timeline-sql-store.url=jdbc:sqlserver://<database_url>:<port>;databaseName=bq_timeline;instance=SQL_EXPRESS
blueriq.datasource.timeline-sql-store.username=<username>
blueriq.datasource.timeline-sql-store.password=<password>
blueriq.datasource.timeline-sql-store.driverClassName=com.microsoft.sqlserver.jdbc.SQLServerDriver
blueriq.hibernate.timeline-sql-store.hbm2ddl.auto=validate
blueriq.hibernate.timeline-sql-store.dialect=org.hibernate.dialect.SQLServer2012Dialect

    2. Using JNDI datasource: this can be configured in the application-jndidatasources.properties file. When configuring JNDI datasources the jndidatasources profile should be enabled.

      Example application-jndidatasources.properties
      blueriq.datasource.timeline-sql-store.jndiName=java:/comp/env/jdbc/blueriqTimeline
blueriq.hibernate.timeline-sql-store.hbm2ddl.auto=validate
blueriq.hibernate.timeline-sql-store.dialect=org.hibernate.dialect.SQLServer2012Dialect
  3. Hibernate settings
    These settings apply to each datasource type in the corresponding properties file, as in the examples above.

Supported dialects:

  • org.hibernate.dialect.SQLServer2012Dialect (for SQL Server)
  • org.hibernate.dialect.Oracle12cDialect (for Oracle)
  • org.hibernate.dialect.H2Dialect (for H2) (we do not recommend using a H2 database in production environments)

Supported hbm2ddl.auto values:

  • validate

Consume timeline events

The Timeline SQL Store component can store timeline messages directly in the database, but it is also possible to decouple the storage of timeline messages using the Timeline Event Publisher Componentto publish timeline events to a queue and then consume them using this component.

To be able to consume event messages, the event channel needs to be configured in the application.properties. This file can be found, or otherwise should be placed in the 

spring.config.additional-location


The Timeline SQL Store either stores timeline messages in the database, or consumes timeline events from the queue. When the configuration below is enabled, only timeline events are consumed, no timeline messages are saved to the database directly. So if you enable this configuration, be sure to also enable the Timeline Event Publisher Component, otherwise no timeline information is saved anywhere.

# RabbitMQ configuration
blueriq.timeline.event.listener.amqp.rabbitmq.host=localhost
blueriq.timeline.event.listener.amqp.rabbitmq.port=5672
blueriq.timeline.event.listener.amqp.rabbitmq.virtualHost=/
blueriq.timeline.event.listener.amqp.rabbitmq.username=guest
blueriq.timeline.event.listener.amqp.rabbitmq.password=guest
blueriq.timeline.event.listener.amqp.rabbitmq.queueNames=trace

blueriq.timeline.event.listener.amqp.concurrency.max-concurrent-consumers=1
blueriq.timeline.event.listener.amqp.concurrency.concurrent-consumers=1

# Enable consumer functionality
blueriq.timeline.event.listener.amqp.enabled=true

In certain circumstances it is possible that an error happens while consuming the timeline event. Because of the workings of RabbitMQ, this will result in an endless loop where it tries to re-send the timeline event until it is correctly consumed. To prevent this, a republish mechanism is added with Blueriq 15.7. This mechanism sends timeline events to a dead-letter-queue when an error occurs. This will prevent the creation of the endless loop. For information see Configuring RabbitMQ


For more information on concurrent consumers see Configuring RabbitMQ.

Enable TLS connection

To enable a secure (TLS) AMQP connection to the queue, set the property "blueriq.timeline.event.listener.amqp.rabbitmq.ssl.enabled" to "true".
The default for AQMP port with TLS on RabbitMQ is '5671', it needs to be explicitly enabled though, see https://www.rabbitmq.com/ssl.html for more information.

Performance

The performance impact of the Timeline SQL Store is minimal when used normally: to write timeline messages to the database and retrieve these messages for one given Case ID.

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