adding caller to error metrics

Author: MichaelGHSeg

core/src/main/java/com/segment/analytics/kotlin/core/Analytics.kt

@@ -98,6 +98,7 @@ open class Analytics protected constructor(
                     Telemetry.INVOKE_ERROR_METRIC, t.stackTraceToString()) {
                     it["error"] = t.toString()
                     it["message"] = "Exception in Analytics Scope"
+                    it["caller"] = t.stackTrace[0].toString()
                 }
             }
             override val analyticsScope = CoroutineScope(SupervisorJob() + exceptionHandler)

core/src/main/java/com/segment/analytics/kotlin/core/HTTPClient.kt

@@ -39,6 +39,7 @@ class HTTPClient(
                 it["error"] = e.toString()
                 it["writekey"] = writeKey
                 it["message"] = "Malformed url"
+                it["caller"] = e.stackTrace[0].toString()
             }
             throw error
         }

core/src/main/java/com/segment/analytics/kotlin/core/Settings.kt

@@ -124,6 +124,7 @@ internal fun Analytics.fetchSettings(
             it["error"] = ex.toString()
             it["writekey"] = writeKey
             it["message"] = "Error retrieving settings"
+            it["caller"] = ex.stackTrace[0].toString()
         }
         configuration.defaultSettings
     }

core/src/main/java/com/segment/analytics/kotlin/core/platform/Mediator.kt

@@ -62,7 +62,8 @@ internal class Mediator(internal var plugins: CopyOnWriteArrayList<Plugin> = Cop
                             it["plugin"] = "${plugin.type}-${plugin.javaClass}"
                         }
                         it["writekey"] = plugin.analytics.configuration.writeKey
-                        it["message"] ="Exception executing plugin"
+                        it["message"] = "Exception executing plugin"
+                        it["caller"] = t.stackTrace[0].toString()
                     }
                 }
             }
@@ -87,6 +88,7 @@ internal class Mediator(internal var plugins: CopyOnWriteArrayList<Plugin> = Cop
                     }
                     it["writekey"] = plugin.analytics.configuration.writeKey
                     it["message"] = "Exception executing plugin"
+                    it["caller"] = t.stackTrace[0].toString()
                 }
             }
         }