Add attempt number to structured activity logger (#1020)

Co-authored-by: Evan Sandoval <[email protected]>

Author: evansandoval

src/main/java/com/uber/cadence/internal/logging/LoggerTag.java

@@ -25,4 +25,5 @@ public class LoggerTag {
   public static final String TASK_LIST = "TaskList";
   public static final String WORKFLOW_ID = "WorkflowID";
   public static final String WORKFLOW_TYPE = "WorkflowType";
+  public static final String ATTEMPT = "Attempt";
 }

src/main/java/com/uber/cadence/internal/worker/ActivityWorker.java

@@ -144,6 +144,7 @@ public void handle(PollForActivityTaskResponse task) throws Exception {
       MDC.put(LoggerTag.ACTIVITY_TYPE, task.getActivityType().getName());
       MDC.put(LoggerTag.WORKFLOW_ID, task.getWorkflowExecution().getWorkflowId());
       MDC.put(LoggerTag.RUN_ID, task.getWorkflowExecution().getRunId());
+      MDC.put(LoggerTag.ATTEMPT, String.valueOf(task.getAttempt()));
 
       propagateContext(task);
       Span span = spanFactory.spanForExecuteActivity(task);
@@ -175,6 +176,7 @@ public void handle(PollForActivityTaskResponse task) throws Exception {
         MDC.remove(LoggerTag.ACTIVITY_TYPE);
         MDC.remove(LoggerTag.WORKFLOW_ID);
         MDC.remove(LoggerTag.RUN_ID);
+        MDC.remove(LoggerTag.ATTEMPT);
         unsetCurrentContext();
       }
     }