application-tracer

diff --git a/src/main/java/br/ufrgs/inf/prosoft/applicationtracer/TracerAspect.java b/src/main/java/br/ufrgs/inf/prosoft/applicationtracer/TracerAspect.java
index d7f3b01..efd9a42 100644
--- a/src/main/java/br/ufrgs/inf/prosoft/applicationtracer/TracerAspect.java
+++ b/src/main/java/br/ufrgs/inf/prosoft/applicationtracer/TracerAspect.java
@@ -12,7 +12,6 @@ import java.nio.file.Files;
 import java.nio.file.NoSuchFileException;
 import java.nio.file.Paths;
 import java.nio.file.StandardOpenOption;
-import java.security.MessageDigest;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -49,18 +48,13 @@ public class TracerAspect {
             String methodName = modifiersReturnAndName[modifiersReturnAndName.length - 1];
             String returnType = modifiersReturnAndName[modifiersReturnAndName.length - 2];
             List<Parameter> parameters = new ArrayList<>();
-            List<Parameter> parametersDigested = new ArrayList<>();
-            MessageDigest messageDigest = MessageDigest.getInstance("SHA-1");
             if (split.length > 1) {
                 String[] parameterTypes = split[1].split(", ");
                 Object[] parametersData = joinPoint.getArgs();
                 for (int i = 0; i < parametersData.length; i++) {
-                    String parameter = JSONObject.createCyclicFields(parametersData[i]).toString();
-                    parametersDigested.add(new Parameter(parameterTypes[i], messageDigest.digest(parameter.getBytes()).toString()));
                     parameters.add(new Parameter(parameterTypes[i], parametersData[i]));
                 }
             }
-            Return returnValueDigested = new Return(returnType, messageDigest.digest(JSONObject.createCyclicFields(proceed).toString().getBytes()).toString());
             Return returnValue = new Return(returnType, proceed);
             String instance;
             try {
@@ -68,21 +62,15 @@ public class TracerAspect {
             } catch (Exception ex) {
                 instance = "s";
             }
-            Trace traceDigested = new Trace(instance, Arrays.asList(modifiers), returnValueDigested, methodName, parametersDigested, startTime, endTime);
             Trace trace = new Trace(instance, Arrays.asList(modifiers), returnValue, methodName, parameters, startTime, endTime);
-            String signature = JSONObject.createAcyclicFields(trace).toString();
-            signature += "\n";
-            String signatureDigested = JSONObject.createAcyclicFields(traceDigested).toString();
-            signatureDigested += "\n";
-            try {
-                Files.write(Paths.get("./trace"), signature.getBytes(), StandardOpenOption.APPEND);
-            } catch (NoSuchFileException e) {
-                Files.write(Paths.get("./trace"), signature.getBytes(), StandardOpenOption.CREATE);
-            }
-            try {
-                Files.write(Paths.get("./traceDigested"), signatureDigested.getBytes(), StandardOpenOption.APPEND);
-            } catch (NoSuchFileException e) {
-                Files.write(Paths.get("./traceDigested"), signatureDigested.getBytes(), StandardOpenOption.CREATE);
+            synchronized (TracerAspect.class) {
+                String signature = JSONObject.createAcyclicFields(trace).toString();
+                signature += "\n";
+                try {
+                    Files.write(Paths.get("./trace"), signature.getBytes(), StandardOpenOption.APPEND);
+                } catch (NoSuchFileException e) {
+                    Files.write(Paths.get("./trace"), signature.getBytes(), StandardOpenOption.CREATE);
+                }
             }
         } catch (Exception ex) {
             System.err.println("[Application Tracer] exception: " + ex);