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[Sone.git] / src / main / kotlin / net / pterodactylus / sone / template / HistogramRenderer.kt

diff --git a/src/main/kotlin/net/pterodactylus/sone/template/HistogramRenderer.kt b/src/main/kotlin/net/pterodactylus/sone/template/HistogramRenderer.kt
new file mode 100644 (file)
index 0000000..dba32b2
--- /dev/null
+++ b/src/main/kotlin/net/pterodactylus/sone/template/HistogramRenderer.kt
@@ -0,0 +1,46 @@
+package net.pterodactylus.sone.template
+
+import com.codahale.metrics.*
+import net.pterodactylus.sone.utils.*
+import net.pterodactylus.util.template.*
+
+/**
+ * [Filter] that renders a [Histogram] as a table row.
+ */
+class HistogramRenderer : Filter {
+
+       override fun format(templateContext: TemplateContext, data: Any?, parameters: Map<String, Any?>?): Any? {
+               templateContext["metricName"] = (parameters?.get("name") as String?)?.dotToCamel()?.let { "Page.Metrics.$it.Title" }
+               (data as? Histogram)?.snapshot?.run {
+                       templateContext["count"] = data.count
+                       templateContext["min"] = min
+                       templateContext["max"] = max
+                       templateContext["mean"] = mean
+                       templateContext["median"] = median
+                       templateContext["percentile75"] = get75thPercentile()
+                       templateContext["percentile95"] = get95thPercentile()
+                       templateContext["percentile98"] = get98thPercentile()
+                       templateContext["percentile99"] = get99thPercentile()
+                       templateContext["percentile999"] = get999thPercentile()
+               }
+               return template.render(templateContext)
+       }
+
+}
+
+private val template = """<tr>
+       <td><% metricName|l10n|html></td>
+       <td class="numeric"><% count|html></td>
+       <td class="numeric"><% min|duration scale=='μs'|html></td>
+       <td class="numeric"><% max|duration scale=='μs'|html></td>
+       <td class="numeric"><% mean|duration scale=='μs'|html></td>
+       <td class="numeric"><% median|duration scale=='μs'|html></td>
+       <td class="numeric"><% percentile75|duration scale=='μs'|html></td>
+       <td class="numeric"><% percentile95|duration scale=='μs'|html></td>
+       <td class="numeric"><% percentile98|duration scale=='μs'|html></td>
+       <td class="numeric"><% percentile99|duration scale=='μs'|html></td>
+       <td class="numeric"><% percentile999|duration scale=='μs'|html></td>
+</tr>""".asTemplate()
+
+private fun String.dotToCamel() =
+               split(".").joinToString("", transform = String::capitalize)