impala/www/query_finstances.tmpl

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  http://www.apache.org/licenses/LICENSE-2.0

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{{> www/common-header.tmpl }}

<link rel="stylesheet" type="text/css" href="{{ __common__.host-url }}/www/datatables/extensions/dataTables.rowGroup-1.5.1.min.css"/>
<script type="text/javascript" src="{{ __common__.host-url }}/www/datatables/extensions/dataTables.rowGroup-1.5.1.min.js"></script>

{{> www/query_detail_tabs.tmpl }}
<br/>
{{?backend_instances}}
<div>
  <label>
    <input type="checkbox" checked="true" id="toggle" onClick="toggleRefresh()"/>
    <span id="refresh_on">Auto-refresh on</span>
  </label>  Last updated: <span id="last-updated"></span>
</div>

<br/>
<table id="finstances" class='table table-hover table-bordered'>
  <thead>
    <tr>
      <th>Host</th>
      <th>Fragment<br/>Name</th>
      <th>Instance ID</th>
      <th>Current state</th>
      <th>Done</th>
      <th>Time since last report (ms)</th>
    </tr>
  </thead>
  <tbody>

  </tbody>
</table>

<script>
let interval_id = 0;
let table = null;
const refresh = () => {
    table.ajax.reload();
    document.getElementById("last-updated").textContent = new Date();
};

// Unpack Json backend_states by merging the backend host name into every instance stats
// row. Also clears the last report timestamp field for instances that have not started or
// have already finished execution.
function unpackJson(json) {
    const result = new Array();
    if (typeof json.backend_instances === "undefined") {
        // Table will be empty, remove it.
        table.table().destroy(true);
        $("#finstances").remove();
        // Display completion message.
        $("#query_finished_alert").css("visibility", "visible");
        // Stop auto refresh
        $("#toggle").prop("checked", false);
        toggleRefresh();
        return json;
    }
    for (let i = 0; i < json.backend_instances.length; ++i) {
        const backend_state = json.backend_instances[i];
        const instance_stats = backend_state.instance_stats;
        for (let j = 0; j < instance_stats.length; ++j) {
            const instance = instance_stats[j];
            instance.host = backend_state.host;
            if (instance.done) instance.time_since_last_heard_from = "";
            if (!instance.first_status_update_received) {
              instance.time_since_last_heard_from = "";
            }
            delete instance.first_status_update_received;
            result.push(instance);
        }
    }
    return result;
}

$(document).ready(() => {
    table = $('#finstances').DataTable({
        ajax: { url: make_url("/query_finstances?query_id={{query_id}}&json"),
                dataSrc: unpackJson,
              },
        "columns": [ {data: 'host'},
                     {data: 'fragment_name'},
                     {data: 'instance_id'},
                     {data: 'current_state'},
                     {data: 'done'},
                     {data: 'time_since_last_heard_from'}],
        "rowGroup": {
          dataSrc : "fragment_name"
        },
        "order": [[ 0, "desc" ]],
        "pageLength": 100
    });
    interval_id = setInterval(refresh, 1000);
});

function toggleRefresh() {
    if (toggle.getElementById("toogle").checked === true) {
        interval_id = setInterval(refresh, 1000);
        document.getElementById("refresh_on").textContent = "Auto-refresh on";
    } else {
        clearInterval(interval_id);
        document.getElementById("refresh_on").textContent = "Auto-refresh off";
    }
}

</script>
{{/backend_instances}}

<div class="alert alert-info" role="alert" id="query_finished_alert"
     style="visibility:hidden">
Query <strong>{{query_id}}</strong> has completed, or has not started any backends, yet.
</div>
{{^backend_instances}}
<script>$("#query_finished_alert").css("visibility", "visible");</script>
{{/backend_instances}}

<script>
$("#finstances-tab").addClass("active");
</script>

{{> www/common-footer.tmpl }}