Add flag to opt-out republishing unconfirmed messages on producer recovery

src/docs/asciidoc/api.adoc

@@ -464,7 +464,12 @@ outstanding unconfirmed messages timed out.
 |Time before enqueueing of a message fail when the maximum number of unconfirmed
 is reached. The callback of the message will be called with a negative status.
 Set the value to `Duration.ZERO` if there should be no timeout.
-|10 seconds.
+|10 seconds
+
+|`retryOnRecovery`
+|Re-publish unconfirmed messages after recovering a connection.
+Set to false if do not want to re-publish unconfirmed messages after recovering a connection.
+|true
 |===
 
 ==== Sending Messages

src/main/java/com/rabbitmq/stream/ProducerBuilder.java

@@ -133,6 +133,18 @@ public interface ProducerBuilder {
    */
   ProducerBuilder enqueueTimeout(Duration timeout);
 
+  /**
+   * Re-publish unconfirmed messages after recovering a connection.
+   *
+   * <p>Default is true.</p>
+   *
+   * <p>Set to false if do not want to re-publish unconfirmed messages after recovering a connection.</p>
+   *
+   * @param retryOnRecovery
+   * @return this builder instance
+   */
+  ProducerBuilder retryOnRecovery(boolean retryOnRecovery);
+
   /**
    * Logic to extract a filter value from a message.
    *

src/main/java/com/rabbitmq/stream/impl/StreamProducer.java

@@ -78,6 +78,7 @@ class StreamProducer implements Producer {
       entity -> ((AccumulatedEntity) entity).publishingId();
   private final long enqueueTimeoutMs;
   private final boolean blockOnMaxUnconfirmed;
+  private final boolean retryOnRecovery;
   private volatile Client client;
   private volatile byte publisherId;
   private volatile Status status;
@@ -95,6 +96,7 @@ class StreamProducer implements Producer {
       int maxUnconfirmedMessages,
       Duration confirmTimeout,
       Duration enqueueTimeout,
+      boolean retryOnRecovery,
       Function<Message, String> filterValueExtractor,
       StreamEnvironment environment) {
     if (filterValueExtractor != null && !environment.filteringSupported()) {
@@ -107,6 +109,7 @@ class StreamProducer implements Producer {
     this.name = name;
     this.stream = stream;
     this.enqueueTimeoutMs = enqueueTimeout.toMillis();
+    this.retryOnRecovery = retryOnRecovery;
     this.blockOnMaxUnconfirmed = enqueueTimeout.isZero();
     this.closingCallback = environment.registerProducer(this, name, this.stream);
     final Client.OutboundEntityWriteCallback delegateWriteCallback;
@@ -504,43 +507,58 @@ void unavailable() {
 
   void running() {
     synchronized (this) {
-      LOGGER.debug(
-          "Re-publishing {} unconfirmed message(s) and {} accumulated message(s)",
-          this.unconfirmedMessages.size(),
-          this.accumulator.size());
-      if (!this.unconfirmedMessages.isEmpty()) {
-        Map<Long, AccumulatedEntity> messagesToResend = new TreeMap<>(this.unconfirmedMessages);
+      if (!this.retryOnRecovery) {
+        LOGGER.debug(
+            "Skip to republish {} unconfirmed message(s) and re-publishing {} accumulated message(s)",
+            this.unconfirmedMessages.size(),
+            this.accumulator.size());
+
         this.unconfirmedMessages.clear();
-        Iterator<Entry<Long, AccumulatedEntity>> resendIterator =
+        int toRelease = maxUnconfirmedMessages - unconfirmedMessagesSemaphore.availablePermits();
+        if (toRelease > 0) {
+          unconfirmedMessagesSemaphore.release(toRelease);
+        }
+
+        publishBatch(false);
+      } else {
+        LOGGER.debug(
+            "Re-publishing {} unconfirmed message(s) and {} accumulated message(s)",
+            this.unconfirmedMessages.size(),
+            this.accumulator.size());
+        if (!this.unconfirmedMessages.isEmpty()) {
+          Map<Long, AccumulatedEntity> messagesToResend = new TreeMap<>(this.unconfirmedMessages);
+          this.unconfirmedMessages.clear();
+          Iterator<Entry<Long, AccumulatedEntity>> resendIterator =
             messagesToResend.entrySet().iterator();
-        while (resendIterator.hasNext()) {
-          List<Object> messages = new ArrayList<>(this.batchSize);
-          int batchCount = 0;
-          while (batchCount != this.batchSize) {
-            Object accMessage = resendIterator.hasNext() ? resendIterator.next().getValue() : null;
-            if (accMessage == null) {
-              break;
+          while (resendIterator.hasNext()) {
+            List<Object> messages = new ArrayList<>(this.batchSize);
+            int batchCount = 0;
+            while (batchCount != this.batchSize) {
+              Object accMessage = resendIterator.hasNext() ? resendIterator.next().getValue() : null;
+              if (accMessage == null) {
+                break;
+              }
+              messages.add(accMessage);
+              batchCount++;
             }
-            messages.add(accMessage);
-            batchCount++;
+            client.publishInternal(
+                this.publishVersion,
+                this.publisherId,
+                messages,
+                this.writeCallback,
+                this.publishSequenceFunction);
           }
-          client.publishInternal(
-              this.publishVersion,
-              this.publisherId,
-              messages,
-              this.writeCallback,
-              this.publishSequenceFunction);
         }
-      }
-      publishBatch(false);
-
-      int toRelease = maxUnconfirmedMessages - unconfirmedMessagesSemaphore.availablePermits();
-      if (toRelease > 0) {
-        unconfirmedMessagesSemaphore.release(toRelease);
-        if (!unconfirmedMessagesSemaphore.tryAcquire(this.unconfirmedMessages.size())) {
-          LOGGER.debug(
-              "Could not acquire {} permit(s) for message republishing",
-              this.unconfirmedMessages.size());
+        publishBatch(false);
+
+        int toRelease = maxUnconfirmedMessages - unconfirmedMessagesSemaphore.availablePermits();
+        if (toRelease > 0) {
+          unconfirmedMessagesSemaphore.release(toRelease);
+          if (!unconfirmedMessagesSemaphore.tryAcquire(this.unconfirmedMessages.size())) {
+            LOGGER.debug(
+                "Could not acquire {} permit(s) for message republishing",
+                this.unconfirmedMessages.size());
+          }
         }
       }
     }

src/main/java/com/rabbitmq/stream/impl/StreamProducerBuilder.java

@@ -47,6 +47,8 @@ class StreamProducerBuilder implements ProducerBuilder {
 
   private Duration enqueueTimeout = Duration.ofSeconds(10);
 
+  private boolean retryOnRecovery = true;
+
   private DefaultRoutingConfiguration routingConfiguration;
 
   private Function<Message, String> filterValueExtractor;
@@ -131,6 +133,12 @@ public ProducerBuilder enqueueTimeout(Duration timeout) {
     return this;
   }
 
+  @Override
+  public ProducerBuilder retryOnRecovery(boolean retryOnRecovery) {
+    this.retryOnRecovery = retryOnRecovery;
+    return this;
+  }
+
   @Override
   public ProducerBuilder filterValue(Function<Message, String> filterValueExtractor) {
     this.filterValueExtractor = filterValueExtractor;
@@ -195,6 +203,7 @@ public Producer build() {
               maxUnconfirmedMessages,
               confirmTimeout,
               enqueueTimeout,
+              retryOnRecovery,
               filterValueExtractor,
               environment);
       this.environment.addProducer((StreamProducer) producer);

src/test/java/com/rabbitmq/stream/impl/StreamProducerTest.java

@@ -243,7 +243,7 @@ void sendToNonExistingStreamShouldReturnUnconfirmedStatus() throws Exception {
   @TestUtils.DisabledIfRabbitMqCtlNotSet
   void shouldRecoverAfterConnectionIsKilled(int subEntrySize) throws Exception {
     Producer producer =
-        environment.producerBuilder().subEntrySize(subEntrySize).stream(stream).build();
+        environment.producerBuilder().subEntrySize(subEntrySize).retryOnRecovery(true).stream(stream).build();
 
     AtomicInteger published = new AtomicInteger(0);
     AtomicInteger confirmed = new AtomicInteger(0);

src/test/java/com/rabbitmq/stream/impl/StreamProducerUnitTest.java

@@ -177,6 +177,7 @@ void confirmTimeoutTaskShouldFailMessagesAfterTimeout(
             messageCount * 10,
             confirmTimeout,
             Duration.ofSeconds(10),
+            true,
             null,
             env);
 
@@ -219,6 +220,7 @@ void enqueueTimeoutMessageShouldBeFailedWhenEnqueueTimeoutIsReached(int subEntry
             2,
             Duration.ofMinutes(1),
             enqueueTimeout,
+            true,
             null,
             env);
 
@@ -258,6 +260,7 @@ void enqueueTimeoutSendingShouldBlockWhenEnqueueTimeoutIsZero(int subEntrySize)
             2,
             Duration.ofMinutes(1),
             enqueueTimeout,
+            true,
             null,
             env);