Mastering Service Actions in BMC Remedy AR System: A Deep Dive into Workflow Automation
In the intricate world of IT Service Management (ITSM) and enterprise application development, the ability to automate processes is not just a luxury; it’s a necessity. BMC Remedy AR System, a robust platform for building and managing service management applications, offers a powerful suite of workflow objects designed to orchestrate complex business processes. Among these, the concept of “Service Action” stands out as a pivotal component for enabling sophisticated interactions and data exchanges within and beyond your AR System environment. This article will demystify Service Actions, exploring their role within the broader AR System workflow architecture, their practical applications, and how to leverage them effectively.
Understanding the Foundation: AR System Workflow
Before we dive into the specifics of Service Actions, it’s crucial to grasp the underlying workflow engine of BMC Remedy AR System. Think of your company’s processes – from ticket creation and assignment to approvals and notifications – as a series of steps that need to be executed in a specific order, under certain conditions. AR System’s workflow engine automates these processes using three primary components:
- Active Links: These are the front-line responders, triggered by user interactions or information displayed on the current screen within the AR System client (like the User tool or Mid-Tier). They excel at providing immediate feedback, manipulating fields on the current form, or initiating other workflow processes based on what the user is doing. Importantly, Active Links operate on the client-side.
- Filters: Operating at the server level, Filters are the workhorses for data manipulation and validation. They are triggered by form transactions – when a request is submitted, modified, deleted, or retrieved. Filters interact directly with the database, making them essential for data integrity and complex business logic that requires server-side processing.
- Escalations: Similar to Filters in that they operate at the server level, Escalations are time-driven. Instead of reacting to immediate user actions, they periodically check the database for requests that meet specific criteria and then execute predefined actions. This is ideal for tasks like aging tickets, sending overdue reminders, or performing scheduled maintenance.
These workflow objects, along with Forms (which act as the schema to represent data, akin to tables in a database), Access Control (managing permissions), and other components, form the backbone of AR System’s automation capabilities.
The Role of Actions within Workflow
Within each of these workflow objects (Active Links, Filters, and Escalations), you define a sequence of Actions. These actions are the actual commands that the system executes. The type of actions available and their applicability often vary depending on the workflow object they are associated with, creating a nuanced landscape of automation possibilities.
For instance, an Active Link might use a Change Field action to alter the appearance of a field label or a Push Fields action to transfer data to another form. A Filter, on the other hand, is more likely to use Set Fields to update data based on complex logic or Direct SQL for external database integrations. Escalations, while sharing many actions with Filters, are primarily designed for bulk operations triggered by time.
The table below provides a glimpse into the action types available across different workflow objects:
| Action Type | Active Links | Filters | Escalations |
|---|---|---|---|
| Call Guide | * | * | |
| Change Field | * | ||
| Close Window | * | ||
| Commit Changes | * | ||
| Distributed Server Option | * | * | |
| Direct SQL | * | * | * |
| Exit Guide | * | * | |
| Go to Guide Label | * | * | |
| Goto | * | * | |
| Log to File | * | * | * |
| Message | * | * | * |
| Notify | * | * | * |
| Open Window | * | ||
| Push Fields | * | * | * |
| Run Process | * | * | * |
| Service | * | * | * |
| Set Fields | * | * | * |
Spotlight on the Service Action
The Service action is a particularly versatile and powerful tool in the AR System workflow arsenal. Its core purpose is to enable seamless interaction with other workflow components, particularly Filters, and to facilitate data exchange without necessarily performing direct database modifications in all scenarios. The Service action can be used in all three main workflow types: Active Links, Filters, and Escalations.
How Service Actions Work
At its heart, a Service action triggers a specific Filter. This triggered Filter is configured with an Execution Option set to Service. When a Service action is invoked:
- Data Exchange: The action passes field values (input mapping) from the calling workflow object (Active Link, Filter, or Escalation) to the triggered Filter. The triggered Filter then processes this data, potentially retrieves additional information from the database, and returns output field values.
- No Direct Database Write (Typically): In Active Links and Filters, the Service action itself doesn’t directly write to the database. It’s about orchestrating data flow. Any changes are then handled by subsequent actions within the triggered Filter or the original workflow.
- Database Writes in Escalations: When used within an Escalation, the Service action can indeed set values in the database, if output data is provided by the triggered Filter.
- Integration Capabilities: The Service action can act as a bridge to external services. It can interact with AR System Web Services to obtain external data or leverage internal AR System services.
The Service Execution Option in Filters
The key to understanding Service Actions lies in the Service execution option available for Filters:
| Execution Option | Description |
|---|---|
| Service | Executes when a Service active link action is performed. The filter accesses a request with the field values passed by the active link action and those retrieved from the database, if any, and returns output values to the calling request. No other database operation is performed. If the filter runs a Push Fields action, the output field value list is not affected. If the filter runs a Set Fields action, the output field value list uses any modified values. |
Practical Use Cases for Service Actions
The Service action, in conjunction with Filters, opens up a world of possibilities for creating dynamic and responsive applications:
- Data Validation and Enrichment: Imagine a user submitting a request. An Active Link could trigger a Service action that invokes a Filter. This Filter could then query a separate “Product Catalog” form using a field value entered by the user (e.g., a product ID). The Filter retrieves the product name, description, and price, and returns this information to the calling Active Link. The Active Link can then use a Set Fields action to populate these fields on the user’s current form, providing instant validation and enrichment.
- Complex Calculations: For intricate calculations that involve multiple data points or external lookups, a Service action can delegate the heavy lifting to a dedicated Filter. This keeps the Active Link clean and focused on user interaction, while the Filter handles the complex logic.
- Web Service Integration: A Service action in an Active Link can call a Filter configured with the Service execution option. This Filter could, in turn, make a call to an external web service (e.g., to get stock prices, customer credit information, or weather data). The results are then passed back and can be displayed to the user or used in further workflow.
- Internal Service Orchestration: You can use Service actions to create modular and reusable workflow components. A Filter designed to perform a specific task (like calculating warranty periods) can be called by multiple Active Links or other Filters via a Service action, promoting a more organized and maintainable codebase.
- Real-time Data Updates in Escalations: While less common for immediate user feedback, using a Service action in an Escalation can be powerful. An Escalation might run a Service action to trigger a Filter. This Filter could then perform a complex update on multiple records based on the escalation’s criteria and return values that the Escalation can use to update its own records, ensuring data consistency across the system.
Example Scenario: Dynamic Product Pricing
Let’s walk through a common scenario:
- User Action: A user is on a “Sales Order” form and enters a “Product ID” in a field.
- Active Link Trigger: An Active Link is configured to fire on the Modify event of the “Product ID” field.
- Service Action: Within this Active Link, a Service action is defined. This action is configured to call a specific Filter (let’s call it “Get Product Details”). The Service action also maps the “Product ID” field from the “Sales Order” form to an input field in the “Get Product Details” Filter.
- Triggered Filter: The “Get Product Details” Filter has its Execution Option set to Service. It has a qualification that checks if the input “Product ID” is valid. If it is, the Filter performs a database query on a “Product Master” form to retrieve the “Product Name”, “Unit Price”, and “Description” for that Product ID.
- Output Mapping: The Filter then maps these retrieved values to output fields.
- Return to Active Link: The Service action in the Active Link receives these output values from the Filter.
- Final Active Link Action: The Active Link then uses a Set Fields action to populate the “Product Name”, “Unit Price”, and “Description” fields on the “Sales Order” form with the values returned by the Filter.
This entire process happens almost instantaneously, providing the user with real-time product information without them having to navigate to another form.
Diving Deeper: Other Workflow Actions and Considerations
While Service Actions are powerful, understanding their context within the broader range of AR System workflow actions is essential for effective automation:
Distinguishing Key Actions
- Commit Changes vs. Run Process with PERFORM-ACTION-APPLY: This is a common point of confusion. Both can result in saving a request in modify mode. However, Commit Changes is a direct action that writes to the database. The Run Process action, particularly when executing an AR System workflow process command like PERFORM-ACTION-APPLY, offers more dynamic possibilities, allowing the action to be determined at runtime. Debugging logs also show Commit Changes explicitly, while Run Process might appear more generically. For dynamic workflow generation, Run Process is often preferred.
- Push Fields vs. Set Fields: Push Fields is designed to transfer data between fields, potentially creating or updating requests in another form. Set Fields, on the other hand, typically sets values for fields on the *current* form or a form associated with the current transaction.
- Direct SQL: This action allows direct SQL commands to non-AR System databases. It’s crucial for integrations but should be used with extreme caution, as modifying AR System’s own tables via Direct SQL is unsupported and can lead to data corruption. It’s best used for pushing data *to* external systems.
- Goto and Go to Guide Label: These actions provide control over the execution order of workflow. Goto jumps to a specific execution order number, while Go to Guide Label navigates within a structured guide, allowing for modular and repeatable workflow segments.
Understanding Cache Modes
The way AR System caches configuration information can impact workflow execution, especially for administrative tasks and escalations. Two key modes are:
- Production Cache Mode (Default): This mode prioritizes user experience. Administrative changes create a separate copy of the cache, allowing regular users to continue working without interruption.
- Development Cache Mode: In this mode, administrative changes can lock the cache, potentially delaying or blocking operations like escalations or long-running queries. This mode is useful during development but can be detrimental in production if not managed carefully.
Troubleshooting Tip: If escalations or long-running filters are consistently slow or timing out, investigate the cache mode and identify any potentially blocking processes.
Audit Form Fields and Trigger Actions
When troubleshooting or auditing workflow, understanding which actions triggered a change is vital. The AR System records actions like:
- 1 GET ENTRY (Retrieval)
- 2-Set (Modification)
- 4-Create (Submission)
- 8-Delete (Removal)
- 16-Merge (Data Import/DSO)
These audit trails can help pinpoint when and why specific workflow paths were taken.
The arsignal Utility
The arsignal utility is a command-line tool used to force an AR System server to reload or update its internal information without a full restart. Options like -e (reload escalation definitions), -c (reload configuration file), and -r (recache definitions from the database) are invaluable for applying configuration changes or refreshing workflow definitions after modifications.
Troubleshooting Tip: After deploying new or modified workflow objects, especially filters and escalations, consider using arsignal -e serverName to ensure the server picks up the changes promptly.
Interview Relevance
Understanding AR System workflow, particularly the distinct roles of Active Links, Filters, and Escalations, along with their associated actions, is fundamental for any AR System developer, administrator, or architect. When interviewing for these roles, expect questions about:
- The difference between client-side (Active Links) and server-side (Filters, Escalations) workflow.
- When to use a Filter versus an Escalation.
- Specific actions like Service, Push Fields, Set Fields, and Direct SQL, and their use cases.
- How to troubleshoot workflow issues, including the role of logs and utilities like arsignal.
- The concept of workflow execution order and how actions like Goto influence it.
- Practical examples of building automated processes using these components.
Conclusion
The Service action, when integrated with the powerful Filter engine in BMC Remedy AR System, provides a sophisticated mechanism for dynamic data exchange and process orchestration. By understanding how Service Actions trigger Filters and how data flows between them, developers can build applications that are not only automated but also intelligent, responsive, and highly integrated. Whether you’re enriching user forms with real-time data, orchestrating complex integrations, or enabling seamless internal service calls, mastering the Service Action is a critical step towards unlocking the full potential of your AR System platform.
As you continue to design and implement AR System solutions, remember to approach workflow design with a clear understanding of your business requirements, the strengths of each workflow object, and the specific capabilities of each action. This methodical approach will ensure you build robust, efficient, and maintainable automated processes.