> For the complete documentation index, see [llms.txt](https://boxlang.ortusbooks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://boxlang.ortusbooks.com/boxlang-framework/interceptors/core-interception-points/template-invocations.md).

# Template Invocations

These events fire during the invocation of BoxLang templates. They are announced on the **global interceptor pool**.

> **Template scope:** `preTemplateInvoke` and `postTemplateInvoke` fire for every template invocation, including `include` calls and nested templates — not just the top-level request template.

| Event Name           | Cancellable | Description                                                                          |
| -------------------- | :---------: | ------------------------------------------------------------------------------------ |
| `preTemplateInvoke`  |      No     | Fired before every template executes.                                                |
| `postTemplateInvoke` |      No     | Fired after every template finishes — always fires, even if an exception was thrown. |

* [`preTemplateInvoke`](#pretemplateinvoke)
* [`postTemplateInvoke`](#posttemplateinvoke)

## preTemplateInvoke

Fired immediately before a BoxLang template (`.bx` or `.bxm` file) begins executing. The template has been pushed onto the template stack at this point.

### Data Structure

| Data Key       | Type               | Description                                     |
| -------------- | ------------------ | ----------------------------------------------- |
| `context`      | `IBoxContext`      | The context in which the template is executing. |
| `template`     | `BoxTemplate`      | The template runnable about to be invoked.      |
| `templatePath` | `ResolvedFilePath` | The resolved file path of the template.         |

### Example

```groovy
class myListener{
	function preTemplateInvoke( struct data ){
		// Log execution, inject variables, enforce access control, etc.
		var templatePath = data.templatePath;
	}
}
```

## postTemplateInvoke

Fired after a BoxLang template finishes executing. This is announced inside a `finally` block, so it **always fires** regardless of whether the template threw an exception. The template is still on the stack when this fires and is popped immediately after.

### Data Structure

| Data Key       | Type               | Description                                 |
| -------------- | ------------------ | ------------------------------------------- |
| `context`      | `IBoxContext`      | The context in which the template executed. |
| `template`     | `BoxTemplate`      | The template runnable that was invoked.     |
| `templatePath` | `ResolvedFilePath` | The resolved file path of the template.     |

### Example

```groovy
class myListener{
	function postTemplateInvoke( struct data ){
		// Collect timing metrics, clean up injected variables, etc.
		var templatePath = data.templatePath;
	}
}
```


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