Scheduler module

Edition CE

License

MLA, GPL

Issues

MGNLSCH

Maven site

Scheduler

Latest

2.3.5

The Magnolia Scheduler module allows you to schedule commands to run at regularly scheduled times and is powered by the Quartz Engine.

Installing with maven

Maven is the easiest way to install the module. Add the following to your bundle:

<dependency>
  <groupId>info.magnolia</groupId>
  <artifactId>magnolia-module-scheduler</artifactId>
  <version>2.3.5</version>
</dependency>

Usage

The Scheduler module can be used to execute any configured command at regular intervals. For example, it can:

  • Activate or deactivate a promotional web page on a specific date.

  • Import content from an external source into a Magnolia workspace.

  • Send emails on specific days.

  • Delete specified forum messages or threads.

  • Synchronize target and source instances.

  • Execute a custom command.

Configuration

The Scheduler module is used to execute commands that are typically configured in other modules. See Commands for more.

Scheduled tasks are configured in modules/scheduler/config/jobs.

Example: demo job that activates the /news page hourly.

image

jobs

required

Jobs node.

<job name>

required

Name of the job.

params

optional

Parameters node.

<parameters>

required/optional

Parameters passed to the command. Depends on the command. For example, the activate command expects to receive a repository name and a content path, and the generatePlanetData command used by the RSS Aggregator module, expects only a repository parameter.

catalog

required

Name of the catalog where the command resides

command

required

Name of the command

cron

required

CRON expression that sets the scheduled execution time. For example 0 0 1 5 11 ? 2010 means run on November 5th, 2010 at 01:00 am (as opposed to 0 0 1 5 11 ? * which will run annually on ``Nov 5th at 01:00 am''). Cronmaker is a useful tool for building expressions

description

optional

Description of the job

enabled

optional, default is false

Enables and disables the job.

concurrent

optional, default is true

Defines whether the same job can be running concurrently.

The Synchronization, Backup and RSS Aggregator modules use the Scheduler module for scheduling their execution.

Scheduling tasks on cluster nodes

In a clustered configuration one or more workspaces is stored in a shared, clustered storage. See Clustering for more. Cluster nodes (Magnolia instances) access the clustered workspace rather than their own workspaces. This can lead to a situation where multiple scheduled jobs attempt to access the same content simultaneously and a lockup occurs. To avoid this situation, identify the cluster nodes and run the job on only one node.

  1. Set the magnolia.clusterid property in the magnolia.properties file of the cluster node. The file is in the /<CATALINA_HOME>/webapps/<contextPath>/WEB-INF/config/default folder. The property value can be a literal cluster name such as public123 (magnolia.clusterid=public123) or a variable such as ${servername}.

  2. To configure the job to run on the identified cluster node, go to /modules/scheduler/jobs and edit the job configuration.

  3. Under the params node, add a clusterId property and set the value to match the magnolia.clusterId of the cluster node where you want to run the job.

    image

Job configurations are stored in the config workspace. If you want to run a particular job on all cluster nodes you would have to cluster the config workspace so that all instances can read the configuration or create the same job configuration on all cluster nodes. This can be time consuming. As a workaround, configure the job once on a clustered instance without the clusterId property. This has the effect that the job will run on all cluster nodes.

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