Assign debug tags to IMAP communication output.

Allows better tracking of the output if multiple connections are active.

Change-Id: I900c9f9ecda06d3191c4cf82af7e774ae70b7dac

provider_src/com/android/email/mail/store/ImapConnection.java

@@ -94,6 +94,8 @@ class ImapConnection {
      */
     private final AtomicInteger mNextCommandTag = new AtomicInteger(0);
 
+    private String mTransportTag;
+
     // Keep others from instantiating directly
     ImapConnection(ImapStore store) {
         setStore(store);
@@ -107,6 +109,16 @@ class ImapConnection {
         mLoginPhrase = null;
     }
 
+    void setTransportTag(String tag) {
+        mTransportTag = tag;
+        if (mTransport != null) {
+            mTransport.setTag(tag);
+        }
+        if (mParser != null) {
+            mParser.setTag(tag);
+        }
+    }
+
     /**
      * Generates and returns the phrase to be used for authentication. This will be a LOGIN with
      * username and password, or an OAUTH authentication string, with username and access token.
@@ -152,6 +164,7 @@ class ImapConnection {
             // copy configuration into a clean transport, if necessary
             if (mTransport == null) {
                 mTransport = mImapStore.cloneTransport();
+                mTransport.setTag(mTransportTag);
             }
 
             mTransport.open();
@@ -277,6 +290,7 @@ class ImapConnection {
     private void createParser() {
         destroyResponses();
         mParser = new ImapResponseParser(mTransport.getInputStream(), mDiscourse);
+        mParser.setTag(mTransportTag);
     }
 
     void destroyResponses() {

provider_src/com/android/email/mail/store/ImapFolder.java

@@ -177,6 +177,7 @@ public class ImapFolder extends Folder {
             // * OK [UIDNEXT 57576] Predicted next UID
             // 2 OK [READ-WRITE] Select completed.
             try {
+                mConnection.setTransportTag(mName + "-" + hashCode());
                 doSelect();
             } catch (IOException ioe) {
                 throw ioExceptionHandler(mConnection, ioe);

provider_src/com/android/email/mail/store/imap/ImapResponseParser.java

@@ -68,6 +68,7 @@ public class ImapResponseParser {
 
     private boolean mIdling;
     private boolean mExpectIdlingResponse;
+    private String mTag;
 
     /**
      * Exception thrown when we receive BYE.  It derives from IOException, so it'll be treated
@@ -100,6 +101,10 @@ public class ImapResponseParser {
         mLiteralKeepInMemoryThreshold = literalKeepInMemoryThreshold;
     }
 
+    public void setTag(String tag) {
+        mTag = tag;
+    }
+
     private static IOException newEOSException() {
         final String message = "End of stream reached";
         if (DebugUtils.DEBUG) {
@@ -149,6 +154,13 @@ public class ImapResponseParser {
         mResponsesToDestroy.clear();
     }
 
+    private String getFormattedTag() {
+        if (mTag != null) {
+            return "(" + mTag + ") ";
+        }
+        return "";
+    }
+
     /**
      * Reads the next response available on the stream and returns an
      * {@link ImapResponse} object that represents it.
@@ -165,7 +177,7 @@ public class ImapResponseParser {
         try {
             response = parseResponse();
             if (DebugUtils.DEBUG) {
-                LogUtils.d(Logging.LOG_TAG, "<<< " + response.toString());
+                LogUtils.d(Logging.LOG_TAG, getFormattedTag() + "<<< " + response.toString());
             }
 
         } catch (RuntimeException e) {

provider_src/com/android/email/mail/transport/MailTransport.java

@@ -55,6 +55,7 @@ public class MailTransport {
             HttpsURLConnection.getDefaultHostnameVerifier();
 
     private final String mDebugLabel;
+    private String mDebugTag;
     private final Context mContext;
     protected final HostAuth mHostAuth;
 
@@ -69,6 +70,10 @@ public class MailTransport {
         mHostAuth = hostAuth;
     }
 
+    public void setTag(String tag) {
+        mDebugTag = tag;
+    }
+
    /**
      * Returns a new transport, using the current transport as a model. The new transport is
      * configured identically (as if {@link #setSecurity(int, boolean)}, {@link #setPort(int)}
@@ -292,16 +297,21 @@ public class MailTransport {
         return mOut;
     }
 
+    private String getFormattedDebugTag() {
+        if (mDebugTag != null) {
+            return "(" + mDebugTag + ") ";
+        }
+        return "";
+    }
+
     /**
      * Writes a single line to the server using \r\n termination.
      */
     public void writeLine(String s, String sensitiveReplacement) throws IOException {
         if (DebugUtils.DEBUG) {
-            if (sensitiveReplacement != null && !Logging.DEBUG_SENSITIVE) {
+            String output = sensitiveReplacement != null && !Logging.DEBUG_SENSITIVE
-                LogUtils.d(Logging.LOG_TAG, ">>> " + sensitiveReplacement);
+                    ? sensitiveReplacement : s;
-            } else {
+            LogUtils.d(Logging.LOG_TAG, getFormattedDebugTag() + ">>> " + output);
-                LogUtils.d(Logging.LOG_TAG, ">>> " + s);
-            }
         }
 
         OutputStream out = getOutputStream();
@@ -333,7 +343,7 @@ public class MailTransport {
         }
         String ret = sb.toString();
         if (loggable && DebugUtils.DEBUG) {
-            LogUtils.d(Logging.LOG_TAG, "<<< " + ret);
+            LogUtils.d(Logging.LOG_TAG, getFormattedDebugTag() + "<<< " + ret);
         }
         return ret;
     }