From 41ebc635e70b614f5072914ad9d1c5f304b1469b Mon Sep 17 00:00:00 2001
From: Cato Olsen <olsen.cato@gmail.com>
Date: Thu, 24 Oct 2024 14:57:05 +0200
Subject: [PATCH] =?UTF-8?q?-=20Logger=20n=C3=A5=20causes=20rekursivt=20om?=
 =?UTF-8?q?=20=C3=B8nskelig=20(default=20off,=20som=20f=C3=B8r).?=
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#deploy-levende-arbeidsforhold-ansettelse
---
 .../src/main/resources/logback-spring.xml     |  1 +
 .../logging/TestnavLogbackEncoder.java        | 21 +++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/apps/levende-arbeidsforhold-ansettelse/src/main/resources/logback-spring.xml b/apps/levende-arbeidsforhold-ansettelse/src/main/resources/logback-spring.xml
index e21ea8ac38f..72ecf8f1337 100644
--- a/apps/levende-arbeidsforhold-ansettelse/src/main/resources/logback-spring.xml
+++ b/apps/levende-arbeidsforhold-ansettelse/src/main/resources/logback-spring.xml
@@ -4,6 +4,7 @@
         <appender name="stdout_json" class="ch.qos.logback.core.ConsoleAppender">
             <encoder class="no.nav.testnav.libs.reactivecore.logging.TestnavLogbackEncoder">
                     <maxStackTraceLength>-1</maxStackTraceLength>
+                    <addCauses>true</addCauses>
 <!--                <throwableConverter class="net.logstash.logback.stacktrace.ShortenedThrowableConverter">-->
 <!--                    <rootCauseFirst>true</rootCauseFirst>-->
 <!--                    -->
diff --git a/libs/reactive-core/src/main/java/no/nav/testnav/libs/reactivecore/logging/TestnavLogbackEncoder.java b/libs/reactive-core/src/main/java/no/nav/testnav/libs/reactivecore/logging/TestnavLogbackEncoder.java
index add94f247f1..bdcfb6cacd2 100644
--- a/libs/reactive-core/src/main/java/no/nav/testnav/libs/reactivecore/logging/TestnavLogbackEncoder.java
+++ b/libs/reactive-core/src/main/java/no/nav/testnav/libs/reactivecore/logging/TestnavLogbackEncoder.java
@@ -1,6 +1,7 @@
 package no.nav.testnav.libs.reactivecore.logging;
 
 import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.classic.spi.IThrowableProxy;
 import ch.qos.logback.classic.spi.ThrowableProxy;
 import com.fasterxml.jackson.core.JsonFactory;
 import lombok.Setter;
@@ -18,6 +19,7 @@
 /**
  * Config:
  *  <li>{@code maxStackTraceLength}: Default 480, set to a negative number to disable truncation of stack trace altogether.</li>
+ *  <li>@{code addCauses}: If {@code true}, adds the cause(s) to the stack trace (without stack traces for each cause) Truncated according to above.</li>
  */
 @Slf4j
 public class TestnavLogbackEncoder extends LogstashEncoder {
@@ -28,6 +30,9 @@ public class TestnavLogbackEncoder extends LogstashEncoder {
     @Setter
     private int maxStackTraceLength = 480;
 
+    @Setter
+    private boolean addCauses = false;
+
     @SneakyThrows
     @Override
     public byte[] encode(ILoggingEvent event) {
@@ -50,6 +55,9 @@ public byte[] encode(ILoggingEvent event) {
                     for (StackTraceElement element : exception.getThrowable().getStackTrace()) {
                         pw.println("\tat " + element);
                     }
+                    if (addCauses) {
+                        recursivelyAddCauses(exception, pw);
+                    }
                     var stackTrace = maxStackTraceLength < 0 ? sw.toString() : sw.toString().substring(0, maxStackTraceLength);
                     generator.writeStringField("stack_trace", stackTrace);
                 }
@@ -63,6 +71,19 @@ public byte[] encode(ILoggingEvent event) {
         return outputStream.toByteArray();
     }
 
+    private static void recursivelyAddCauses(IThrowableProxy exception, PrintWriter pw) {
+        var cause = exception.getCause();
+        if (cause != null) {
+            pw
+                    .append("caused by ")
+                    .append(cause.getClassName())
+                    .append(": ")
+                    .append(cause.getMessage())
+                    .append("\n");
+            recursivelyAddCauses(cause, pw);
+        }
+    }
+
     private String formatMessage(String message) {
         var matcher = pattern.matcher(message);