# App Engines

> Browse PeopleSoft Application Engine program structures, sections, steps, actions, and source code.

---

LLMS index: [llms.txt](/llms.txt)

---

<div id="pslens-context-panel" class="card border-info mb-4 d-none">
  <div class="card-header bg-light text-info py-2 fw-bold d-flex align-items-center border-bottom border-info-subtle">
    <i class="bi bi-info-circle-fill me-2"></i>
    <span>Tailored Operational Context</span>
  </div>
  <div class="card-body p-0">
    <ul class="list-group list-group-flush">
      <li id="row-db" class="list-group-item d-flex align-items-center justify-content-between py-2 d-none">
        <strong>Target Database:</strong>
        <span id="ctx-db" class="badge bg-secondary font-monospace">&mdash;</span>
      </li>
      <li id="row-type" class="list-group-item d-flex align-items-center justify-content-between py-2 d-none">
        <strong>Context Type:</strong>
        <span id="ctx-type" class="badge bg-light text-dark border font-monospace text-uppercase">&mdash;</span>
      </li>
      <li id="row-severity" class="list-group-item d-flex align-items-center justify-content-between py-2 d-none">
        <strong>Alert Severity:</strong>
        <span id="ctx-severity" class="badge">&mdash;</span>
      </li>
      <li id="row-time" class="list-group-item d-flex align-items-center justify-content-between py-2 d-none">
        <strong>Triggered Time:</strong>
        <span id="ctx-time" class="text-muted small">&mdash;</span>
      </li>
      <li id="row-details" class="list-group-item py-2 d-none">
        <strong id="label-details" class="d-block mb-1">Firing Context:</strong>
        <code id="ctx-details" class="d-block p-2 bg-light border rounded small" style="white-space: pre-wrap; word-break: break-all;">&mdash;</code>
      </li>
    </ul>
  </div>
</div>

<script>
  (function() {
    const params = new URLSearchParams(window.location.search);
    const metadata = params.get('metadata');
    if (!metadata) return;

    try {
      
      const base64 = metadata.replace(/-/g, '+').replace(/_/g, '/');
      const jsonStr = decodeURIComponent(escape(window.atob(base64)));
      const data = JSON.parse(jsonStr);

      if (data) {
        let hasData = false;

        if (data.db) {
          document.getElementById('ctx-db').textContent = data.db;
          document.getElementById('row-db').classList.remove('d-none');
          hasData = true;
        }

        if (data.type) {
          document.getElementById('ctx-type').textContent = data.type;
          document.getElementById('row-type').classList.remove('d-none');
          hasData = true;
        }

        if (data.severity) {
          const severityBadge = document.getElementById('ctx-severity');
          const severity = data.severity.toLowerCase();
          severityBadge.textContent = severity.toUpperCase();
          if (severity === 'critical') {
            severityBadge.className = 'badge bg-danger';
          } else if (severity === 'warning') {
            severityBadge.className = 'badge bg-warning text-dark';
          } else {
            severityBadge.className = 'badge bg-info';
          }
          document.getElementById('row-severity').classList.remove('d-none');
          hasData = true;
        }

        if (data.t) {
          const date = new Date(data.t * 1000);
          document.getElementById('ctx-time').textContent = date.toLocaleString();
          document.getElementById('row-time').classList.remove('d-none');
          hasData = true;
        }

        if (data.details) {
          document.getElementById('ctx-details').textContent = data.details;

          
          const labelDetails = document.getElementById('label-details');
          if (data.type === 'object') {
            labelDetails.textContent = 'Object Metadata Details:';
          } else if (data.type === 'report') {
            labelDetails.textContent = 'Report Description:';
          } else {
            labelDetails.textContent = 'Firing Context:';
          }

          document.getElementById('row-details').classList.remove('d-none');
          hasData = true;
        }

        if (hasData) {
          document.getElementById('pslens-context-panel').classList.remove('d-none');
        }
      }
    } catch (e) {
      console.error('Failed to parse operational context metadata:', e);
    }
  })();
</script>


## What It Is

Application Engines (AE) are PeopleSoft's batch processing framework. Unlike traditional COBOL or SQR programs, Application Engine programs are defined in PeopleSoft metadata tables (such as `PSAEAPPLDEFN`, `PSAESECTDEFN`, `PSAESTEPDEFN`, and `PSAESTMTDEFN`) and executed by the `psae` batch executable. They are commonly used for data processing, background calculations, integrations, and ETL processes.

psLens allows you to search and browse the structure of Application Engine programs, inspect their sections, steps, and actions, and view the associated SQL and PeopleCode source code without opening App Designer.

## Search Page

URL: `/appengines?db={database}`

* **Search:** Search for Application Engines by program name (prefix match). Type `PSAE` to find all AEs starting with `PSAE`. Use `%` as a wildcard if needed (e.g., `%PRCS%` to find programs containing `PRCS`).
* **Metadata Card:** Each search result card shows the program description, owner ID, and last modified operator/timestamp.

## Detail Page

URL: `/appengines/{APPLID}?db={database}`

The Detail Page exposes the internal structure of the Application Engine program:

* **Program Properties:** Shows description, owner ID, program type (Standard, Upgrade, Import, Daemon), active status, disable restart setting, and modification details.
* **Sections & Steps Tree:** Lists all sections (e.g., `MAIN`) and steps defined in the program.
* **Actions View:** For each step, psLens shows the actions it executes (SQL, PeopleCode, Call Section, Log Message, XSLT, Do Select, Do Until, Do While, Do When).
* **Source Code Viewer:** Steps that run SQL or PeopleCode actions can be expanded to view the actual code inline.
* **Export as Markdown:** Reconstructs the entire Application Engine structure, including all sections, steps, actions, and embedded code, into a single structured Markdown file.