feat: add label fullStacktrace (#40)

* feat: add label fullStacktrace

* feat: fix review changes

Author: athakor

google-cloud-contrib/google-cloud-logging-logback/src/main/java/com/google/cloud/logging/logback/LoggingAppender.java

@@ -72,6 +72,7 @@ public class LoggingAppender extends UnsynchronizedAppenderBase<ILoggingEvent> {
   private static final String LEVEL_NAME_KEY = "levelName";
   private static final String LEVEL_VALUE_KEY = "levelValue";
   private static final String LOGGER_NAME_KEY = "loggerName";
+  private static final String STACKTRACE = "fullStacktrace";
 
   private volatile Logging logging;
   private LoggingOptions loggingOptions;
@@ -269,14 +270,15 @@ private LogEntry logEntryFor(ILoggingEvent e) {
 
     Level level = e.getLevel();
     LogEntry.Builder builder =
-        LogEntry.newBuilder(Payload.StringPayload.of(payload.toString().trim()))
+        LogEntry.newBuilder(Payload.StringPayload.of(e.getMessage().trim()))
             .setTimestamp(e.getTimeStamp())
             .setSeverity(severityFor(level));
 
     builder
         .addLabel(LEVEL_NAME_KEY, level.toString())
         .addLabel(LEVEL_VALUE_KEY, String.valueOf(level.toInt()))
         .addLabel(LOGGER_NAME_KEY, e.getLoggerName());
+        .addLabel(STACKTRACE, payload.toString().trim());
 
     for (Map.Entry<String, String> entry : e.getMDCPropertyMap().entrySet()) {
       if (null != entry.getKey() && null != entry.getValue()) {

google-cloud-contrib/google-cloud-logging-logback/src/test/java/com/google/cloud/logging/logback/LoggingAppenderTest.java

@@ -87,6 +87,7 @@ public void testFlushLevelConfigUpdatesLoggingFlushSeverity() {
                     .put("levelName", "WARN")
                     .put("levelValue", String.valueOf(30000L))
                     .put("loggerName", this.getClass().getName())
+                    .put("fullStacktrace", "this is a test".trim())
                     .build())
             .build();
     logging.setFlushSeverity(Severity.WARNING);
@@ -112,9 +113,10 @@ public void testFilterLogsOnlyLogsAtOrAboveLogLevel() {
             .setSeverity(Severity.ERROR)
             .setLabels(
                 new ImmutableMap.Builder<String, String>()
-                    .put("levelName", "ERROR")
-                    .put("levelValue", String.valueOf(40000L))
-                    .put("loggerName", this.getClass().getName())
+                    .put("levelName","ERROR")
+                    .put("levelValue",String.valueOf(40000L))
+                    .put("loggerName",this.getClass().getName())
+                    .put("fullStacktrace","this is a test".trim())
                     .build())
             .build();
     logging.setFlushSeverity(Severity.ERROR);
@@ -150,6 +152,7 @@ public void testEnhancersAddCorrectLabelsToLogEntries() {
                     .put("levelName", "WARN")
                     .put("levelValue", String.valueOf(30000L))
                     .put("loggerName", this.getClass().getName())
+                    .put("fullStacktrace", "this is a test".trim())
                     .put("test-label-1", "test-value-1")
                     .put("test-label-2", "test-value-2")
                     .build())
@@ -199,6 +202,7 @@ public void testMdcValuesAreConvertedToLabels() {
                     .put("levelName", "INFO")
                     .put("levelValue", String.valueOf(20000L))
                     .put("loggerName", this.getClass().getName())
+                    .put("fullStacktrace", "this is a test".trim())
                     .put("mdc1", "value1")
                     .put("mdc2", "value2")
                     .build())