## Preface

The Trigger plugin allows you to configure Deployit to send emails for certain events. For example, you can add rules to send an email whenever a step fails, or when a deployment has completed successfully.

When Deployit resolves a deployment plan, a task comprising of multiple steps is created and subsequently executed. The task, along with the steps, transition throught various states before finally completing. The Trigger Plugin allows a user to associate actions, example sending an email, to be triggered for one of these state transitions.

## Requirements

This plugin is bundled with Deployit from version 3.8 and has no additional requirements.

## Actions

With the trigger plugin, you can define notification actions for certain events.

The following Deployit objects are made available to the actions:

- Deployed Application: The entire deployed application containing application and environment configuration items. See UDM CI reference for udm.DeployedApplication.
- Task: Contains information about the task. The following properties are available,
  - id
  - state
  - description
  - startDate
  - completionDate
  - nrSteps : number of steps in the task.
  - currentStepNr : the current step been executed.
  - failureCount : number of times the task has failed
  - owner
  - steps : List of steps in the task. Not available when action triggered from StepTrigger. See step information below for properties.

- Step: Contains information about a step. Not available when action triggered from TaskTrigger. The following properties are available,

  - description
  - state
  - log
  - startDate
  - completionDate
  - failureCount

- Action: Reference to the executing action itself.

### Email Action

This section describes how to configure an email action.

First, you will need to define a mail.SmtpServer CI under the Configuration root. See the Generic Model Plugin Manual for more details.

The trigger.EmailNotification CI is used to define the message template for the emails that will be sent.

Under the Configuration root, define a `trigger.EmailNotification` configuration item. In the CLI you can do something like:

    myEmailAction = factory.configurationItem("Configuration/MyFailedDeploymentNotification", "trigger.EmailNotification")
    myEmailAction.mailServer = "Configuration/MailServer"
    myEmailAction.subject = "Application ${deployedApplication.version.application.name} failed."
    myEmailAction.toAddresses = ["support@mycompany.com"]
    myEmailAction.body = "Deployment of ${deployedApplication.version.application.name} was cancelled on environment ${deployedApplication.environment.name}"
    repository.create(myEmailAction)

The subject, toAddresses, fromAddress, body properties accept FreeMarker template syntax and can access the following Deployit objects:

- `${deployedApplication}`
- `${task}`
- `${step}`

For example, `${deployedApplication.version.application.name}` refers to the name of the application being deployed.

The email body can also be defined in an external template file. Set the path to the file in the `bodyTemplatePath` property. This can be either an absolute path, or a relative path that will be resolved via Deployit's classpath. By specifying a relative path, Deployit will look in the `ext` directory of the Deployit Server and in all (packaged) plugin jar files.

## State Transitions

To enable a trigger for deployments, add it to the `triggers` property of an Environment. The trigger will then listen to state transitions in tasks and steps that occur during a deployment. When the state transition described by the trigger matches, the associated actions are executed.

Deployit 3.8 is shipped with the EmailNotification trigger. Custom trigger actions can be written in Java.

### Task state transitions

From | To | Description
--- | --- | ---
Queued | Pending | Thread becomes available to execut task.
Pending | Executing | Task starts to execute.
Executing | Stopped | Task is stopped due to step failure, pause step or user aborted step.
Executing | Executed | Task has executed successfully.
Executed | Done | Task is stored in Deployit's archive.
Stopped | Executing | User continues the execution of a failed, paused or aborted step.
Stopped | Cancelled | User cancels task.

A TaskTrigger can be defined under the Configuration root and associated with the environment on which it should be triggered.

    taskTrigger = factory.configurationItem("Configuration/TriggerOnCancel","trigger.TaskTrigger")
    taskTrigger.fromState = "ANY"
    taskTrigger.toState   = "CANCELLED"
    taskTrigger.actions   = [myEmailAction]
    repository.create(taskTrigger)

    env = repository.read("Environments/Dev")
    env.triggers = ["Configuration/TriggerOnCancel"]
    repository.update(env)

### Step state transitions

From | To | Description
--- | --- | ---
Pending | Executing | Step starts to execute.
Pending | Skip | User marks pending step to be skipped.
Skip | Pending | Step is unskipped.
Skip | Skipped | Step was skipped during execution.
Executing | Done | Step completed executing successfully.
Executing | Failed | Step failed during execution.
Executing | Paused | Step paused its execution.
Paused | Skip | User marks paused step to be skipped.
Paused | Executing | User continues the execution of paused step.
Failed | Skip | User marks failed step to be skipped.
Failed | Executing | User retries the execution of failed step.

A StepTrigger can be defined under the Configuration root and associated with the environment on which it should be triggered.

    stepTrigger = factory.configurationItem("Configuration/TriggerOnFailure","trigger.StepTrigger")
    stepTrigger.fromState = "EXECUTING"
    stepTrigger.toState   = "FAILED"
    stepTrigger.actions   = [myEmailAction]
    repository.create(stepTrigger)

    env = repository.read("Environments/Dev")
    env.triggers = ["Configuration/TriggerOnFailure"]
    repository.update(env)

# CI Reference

## Configuration Item Overview

### Other Configuration Items

## Configuration Item Details

### mail.SmtpServer

Type Hierarchy | udm.BaseConfigurationItem
Interfaces | udm.ConfigurationItem

SMTP Mail Server Configuration

|  | Public Properties
--- | --- | ---
|  | fromAddress : STRING
|  | Default from address to use for messages sent with this server.
|  | host : STRING
|  | SMTP host
|  | port : INTEGER = 25
|  | SMTP port
|  | password : STRING
|  | Password to authenticate with host
|  | smtpProperties : MAP_STRING_STRING
|  | Refer to http://javamail.kenai.com/nonav/javadocs/com/sun/mail/smtp/package-summary.html for all properties that can be used.
|  | testAddress : STRING
|  | The address to which a test mail is sent when using the 'Send Test Mail' control task.
|  | username : STRING
|  | Username to authenticate with host

Control task | Parameter CI | Attributes | Description
--- | --- | --- | ---
sendTestMail |  |  | no description

### trigger.EmailNotification

Type Hierarchy | udm.BaseConfigurationItem
Interfaces | trigger.Action, udm.ConfigurationItem

Email Action

|  | Public Properties
--- | --- | ---
|  | mailServer : CI<mail.SmtpServer >
|  | The mail server used to send the email.
|  | subject : STRING
|  | Mail subject
|  | toAddresses : LIST_OF_STRING
|  | Mail addresses of recepients.
|  | body : STRING
|  | Mail body content in the form of a Freemarker template.
|  | bodyTemplatePath : STRING
|  | Freemarker template used to render mail body content. Path can be absolute or relative to Deployit's classpath.
|  | fromAddress : STRING
|  | From mail address. Defaults to SMTPServer fromAddress.

### trigger.StepTrigger

Type Hierarchy | trigger.Trigger >> udm.BaseConfigurationItem
Interfaces | udm.ConfigurationItem

Defines actions to executed for the specified state transition of a Step.

|  | Public Properties
--- | --- | ---
|  | actions : LIST_OF_CI<trigger.Action>
|  | Actions to execute when specified state transition occurs.
|  | fromState : ENUM [ANY, PENDING, SKIP, EXECUTING, DONE, FAILED, PAUSED, SKIPPED] = ANY
|  | Trigger actions when the Step transitions from this state.
|  | toState : ENUM [ANY, PENDING, SKIP, EXECUTING, DONE, FAILED, PAUSED, SKIPPED]
|  | Trigger actions when the Step transitions to this state.

### trigger.TaskTrigger

Type Hierarchy | trigger.Trigger >> udm.BaseConfigurationItem
Interfaces | udm.ConfigurationItem

Defines actions to executed for the specified state transition of a Task.

|  | Public Properties
--- | --- | ---
|  | actions : LIST_OF_CI<trigger.Action>
|  | Actions to execute when specified state transition occurs.
|  | fromState : ENUM [ANY, QUEUED, PENDING, EXECUTING, DONE, STOPPED, EXECUTED, CANCELLED] = ANY
|  | Trigger actions when the Task transitions from this state.
|  | toState : ENUM [ANY, QUEUED, PENDING, EXECUTING, DONE, STOPPED, EXECUTED, CANCELLED]
|  | Trigger actions when the Task transitions to this state.

### trigger.Trigger

Virtual Type
Type Hierarchy | udm.BaseConfigurationItem
Interfaces | udm.ConfigurationItem

Trigger with associated actions.

|  | Public Properties
--- | --- | ---
|  | actions : LIST_OF_CI<trigger.Action>
|  | Actions to execute when specified state transition occurs.