modify websocket receive callback to allow indicating the message was not saved and should be re-delivered

.gitlab-ci.yml

@@ -2,7 +2,7 @@ stages:
   - build
 
 variables:
-  version: "v2.15.3_unofficial_50"
+  version: "v2.15.3_unofficial_50_signald_1"
   GRADLE_OPTS: -Dorg.gradle.daemon=false
 
 build:

libsignal-service-java.patch

@@ -1,18 +1,22 @@
-From dfcc82ab4b4f4d3c18e210ba724ce761deaa6e91 Mon Sep 17 00:00:00 2001
+From ae19ed8b15251adae911868ffe570e5608bc2eef Mon Sep 17 00:00:00 2001
 From: signald <nobody@signald.org>
 Date: Thu, 16 Jun 2022 13:04:00 -0700
-Subject: [PATCH] update build files
+Subject: [PATCH] update build files and provide a way for the websocket
+ receive callback to indicate the message was not saved
 
 ---
- build.gradle                     | 15 ++-------------
+ build.gradle                                  | 17 +++--------------
- dependencies.gradle              |  3 +--
+ dependencies.gradle                           |  3 +--
- gradle/verification-metadata.xml | 13 ++++++++-----
+ gradle/verification-metadata.xml              | 13 ++++++++-----
- service/build.gradle             | 19 +++++++++----------
+ service/build.gradle                          | 19 +++++++++----------
- settings.gradle                  |  1 -
+ .../signalservice/api/NotSavedException.java  |  4 ++++
- 5 files changed, 20 insertions(+), 31 deletions(-)
+ .../signalservice/api/SignalWebSocket.java    | 13 ++++++++++---
+ settings.gradle                               |  1 -
+ 7 files changed, 35 insertions(+), 35 deletions(-)
+ create mode 100644 service/src/main/java/org/whispersystems/signalservice/api/NotSavedException.java
 
 diff --git a/build.gradle b/build.gradle
-index 2498bfcb..9a69ac82 100644
+index 2498bfcb..965084e6 100644
 --- a/build.gradle
 +++ b/build.gradle
 @@ -9,11 +9,8 @@ buildscript {
@@ -42,8 +46,9 @@ index 2498bfcb..9a69ac82 100644
 -}
  
  subprojects {
-     ext.lib_signal_service_version_number = "2.15.3_unofficial_50"
+-    ext.lib_signal_service_version_number = "2.15.3_unofficial_50"
 -    ext.lib_signal_service_group_info     = "com.github.turasa"
++    ext.lib_signal_service_version_number = "2.15.3_unofficial_50_signald_1"
 +    ext.lib_signal_service_group_info     = "org.signald"
  
      if (JavaVersion.current().isJava8Compatible()) {
@@ -139,6 +144,58 @@ index ae4df43a..4b0240d8 100644
 -    required { isReleaseBuild() && gradle.taskGraph.hasTask("uploadArchives") }
 -    sign publishing.publications.mavenJava
 -}
+diff --git a/service/src/main/java/org/whispersystems/signalservice/api/NotSavedException.java b/service/src/main/java/org/whispersystems/signalservice/api/NotSavedException.java
+new file mode 100644
+index 00000000..05d77d1f
+--- /dev/null
++++ b/service/src/main/java/org/whispersystems/signalservice/api/NotSavedException.java
+@@ -0,0 +1,4 @@
++package org.whispersystems.signalservice.api;
++
++public class NotSavedException extends Exception {
++}
+diff --git a/service/src/main/java/org/whispersystems/signalservice/api/SignalWebSocket.java b/service/src/main/java/org/whispersystems/signalservice/api/SignalWebSocket.java
+index 5a98f3c4..dff24940 100644
+--- a/service/src/main/java/org/whispersystems/signalservice/api/SignalWebSocket.java
++++ b/service/src/main/java/org/whispersystems/signalservice/api/SignalWebSocket.java
+@@ -243,6 +243,7 @@ public final class SignalWebSocket {
+     while (true) {
+       WebSocketRequestMessage  request  = getWebSocket().readRequest(timeout);
+       WebSocketResponseMessage response = createWebSocketResponse(request);
++      boolean sendResponse = true; // indicates the acknowledgement should be sent to the server
+       try {
+         if (isSignalServiceEnvelope(request)) {
+           Optional<String> timestampHeader = findHeader(request);
+@@ -258,13 +259,19 @@ public final class SignalWebSocket {
+ 
+           SignalServiceEnvelope envelope = new SignalServiceEnvelope(request.getBody().toByteArray(), timestamp);
+ 
+-          callback.onMessage(envelope);
++          try {
++            callback.onMessage(envelope);
++          } catch (NotSavedException e) {
++            sendResponse = false;
++          }
+           return Optional.of(envelope);
+         } else if (isSocketEmptyRequest(request)) {
+           return Optional.empty();
+         }
+       } finally {
+-        getWebSocket().sendResponse(response);
++        if(sendResponse) {
++          getWebSocket().sendResponse(response);
++        }
+       }
+     }
+   }
+@@ -315,6 +322,6 @@ public final class SignalWebSocket {
+    * received.
+    */
+   public interface MessageReceivedCallback {
+-    void onMessage(SignalServiceEnvelope envelope);
++    void onMessage(SignalServiceEnvelope envelope) throws NotSavedException;
+   }
+ }
 diff --git a/settings.gradle b/settings.gradle
 index 8861c008..8dd03423 100644
 --- a/settings.gradle