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umich-its-tl/viadutoo
=====================

Viadutoo: caching proxy endpoint for Caliper event data

1.1.0(10y ago)084proprietaryPHPPHP >=5.4

Since Jan 8Pushed 9y ago8 watchersCompare

[ Source](https://github.com/tl-its-umich-edu/viadutoo)[ Packagist](https://packagist.org/packages/umich-its-tl/viadutoo)[ RSS](/packages/umich-its-tl-viadutoo/feed)WikiDiscussions master Synced 2w ago

READMEChangelog (1)Dependencies (1)Versions (9)Used By (0)

Viadutoo
========

[](#viadutoo)

About
-----

[](#about)

Viadutoo (From the Portuguese word for viaduct, "viaduto". Pronounced as "vee-uh-DOO-too" or in IPA: \[vi.a.dˈu.tʊ\].) is a kind of caching proxy endpoint for Caliper event data. As a proxy, its purpose is to accept Caliper event payloads from sensors as quickly as possible, then resend them to a preconfigured upstream endpoint. If the upstream endpoint is unable to accept the event payload for some reason, the caching feature will store the event data in a database for future processing.

Requirements
------------

[](#requirements)

- PHP 5.4 or greater
- One of the following PHP HTTP client extensions:
    - curl (usually this is already included with PHP interpreter)
    - pecl\_http
- Composer (not strictly required, but highly recommended)
    - For installation details, see:

Usage
-----

[](#usage)

- Update the `composer.json` file in the root directory of your project as follows:

    - The `require` section should include the following:

        ```
        {
            "require": {
                "php": ">=5.4",
                "umich-its-tl/viadutoo": "1.1.0"
            }
        }
        ```
    - If a repository is not specified, Composer will install Viadutoo from Packagist (). However, to specify a GitHub repository as the source instead, include the following in the `repositories` section:

        ```
        {
            "repositories": [
                {
                    "type": "vcs",
                    "url": "https://github.com/tl-its-umich-edu/viadutoo"
                }
            ]
        }
        ```

        This is one way to specify your own repository, for example, if you want to modify your own fork of Viadutoo. You would specify the URL of your own repository.
- Use Composer to install the package with the command:

    ```
    composer install
    ```

    Composer will create the `vendor` directory to hold the package and other related information.
- Composer will create PHP classes to help you load Viadutoo (and any other packages it has loaded) into your application. In your PHP code, use it like:

    ```
    /*
     * If necessary, use set_include_path() to ensure the directory
     * containing the "vendor" directory is in the PHP include path.
     */
    require_once 'vendor/autoload.php';  // Composer loader for Viadutoo, etc.
    ```
- Initialize and use Viadutoo in your PHP code like this:

    ```
    $proxy = (new MessageProxy())
        ->setTransportInterface(
            (new CurlTransport()) // Recommended transport with cURL, supports Basic Auth and OAuth 1.0
                ->setAuthZType(CurlTransport::AUTHZ_TYPE_OAUTH1, 'OAuth 1.0 key', 'OAuth 1.0 secret') // Optional authZ
        )
        ->setEndpointUrl('http://example.com/endpoint')
        ->setTimeoutSeconds(10)
        ->setAutostoreOnSendFailure(true)
        ->setStorageInterface(
            new MysqlStorage(
                'mysql.example.org', 'dbUser', 'dbPassword',
                'dbName', 'viadutoo_events'
            )
        );
    // ...
    try {
        $proxy
            ->setHeaders($headers)
            ->setBody($jsonBody)
            ->send();
    } catch (Exception $exception) {
        error_log($exception->getMessage());
    }
    ```

    For a more detailed example of using Viadutoo in an application, see `public/index.php`.

Example
-------

[](#example)

An example application is included in the `public` directory. Execute it as:

```
cd public
php -S 127.0.0.1:8989

```

The application is written to send all data to `http://lti.tools/caliper/event?key=viadutoo`. Simply configure a Caliper sensor to send events to `http://127.0.0.1:8989/` and they will be sent on to the `lti.tools` endpoint.

###  Health Score

28

—

LowBetter than 51% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity9

Limited adoption so far

Community12

Small or concentrated contributor base

Maturity63

Established project with proven stability

 Bus Factor1

Top contributor holds 99% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Every ~72 days

Total

3

Last Release

3715d ago

### Community

Maintainers

![](https://avatars.githubusercontent.com/u/20786?v=4)[Mr. Lance E Sloan «UMich»](/maintainers/lsloan)[@lsloan](https://github.com/lsloan)

---

Top Contributors

[![lsloan](https://avatars.githubusercontent.com/u/20786?v=4)](https://github.com/lsloan "lsloan (96 commits)")[![bethkirschner](https://avatars.githubusercontent.com/u/138902?v=4)](https://github.com/bethkirschner "bethkirschner (1 commits)")

---

Tags

learning-analyticsviadutoo

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