Added simple handler for topic's internal retryable streams

table/src/test/java/tech/ydb/table/values/DecimalValueTest.java

@@ -192,8 +192,6 @@ public void allTypeInfiniteAndNan() {
                 BigDecimal scaledInf = new BigDecimal(inf, scale);
                 BigDecimal scaledNan = new BigDecimal(nan, scale);
 
-                System.out.println("Nan for " + scaled + " -> " + scaledNan);
-
                 assertIsInf(scaled.newValue(scaledInf));
                 assertIsNegInf(scaled.newValue(scaledInf.negate()));
 

topic/src/main/java/tech/ydb/topic/impl/GrpcStreamRetrier.java

@@ -8,6 +8,7 @@
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.BiConsumer;
 
 import org.slf4j.Logger;
 
@@ -29,12 +30,15 @@ public abstract class GrpcStreamRetrier {
     protected final String id;
     protected final AtomicBoolean isReconnecting = new AtomicBoolean(false);
     protected final AtomicBoolean isStopped = new AtomicBoolean(false);
-    private final ScheduledExecutorService scheduler;
     protected final AtomicInteger reconnectCounter = new AtomicInteger(0);
 
-    protected GrpcStreamRetrier(ScheduledExecutorService scheduler) {
+    private final ScheduledExecutorService scheduler;
+    private final BiConsumer<Status, Throwable> errorsHandler;
+
+    protected GrpcStreamRetrier(ScheduledExecutorService scheduler, BiConsumer<Status, Throwable> errorsHandler) {
         this.scheduler = scheduler;
         this.id = generateRandomId(ID_LENGTH);
+        this.errorsHandler = errorsHandler;
     }
 
     protected abstract Logger getLogger();
@@ -127,6 +131,10 @@ protected void onSessionClosed(Status status, Throwable th) {
             }
         }
 
+        if (errorsHandler != null) {
+            errorsHandler.accept(status, th);
+        }
+
         if (!isStopped.get()) {
             tryScheduleReconnect();
         } else  {

topic/src/main/java/tech/ydb/topic/read/impl/ReaderImpl.java

@@ -55,7 +55,7 @@ public abstract class ReaderImpl extends GrpcStreamRetrier {
     private final String consumerName;
 
     public ReaderImpl(TopicRpc topicRpc, ReaderSettings settings) {
-        super(topicRpc.getScheduler());
+        super(topicRpc.getScheduler(), settings.getErrorsHandler());
         this.topicRpc = topicRpc;
         this.settings = settings;
         this.session = new ReadSessionImpl();

topic/src/main/java/tech/ydb/topic/settings/ReaderSettings.java

@@ -3,11 +3,14 @@
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.Executor;
+import java.util.function.BiConsumer;
 
 import javax.annotation.Nullable;
 
 import com.google.common.collect.ImmutableList;
 
+import tech.ydb.core.Status;
+
 /**
  * @author Nikolay Perfilov
  */
@@ -19,13 +22,15 @@ public class ReaderSettings {
     private final List<TopicReadSettings> topics;
     private final long maxMemoryUsageBytes;
     private final Executor decompressionExecutor;
+    private final BiConsumer<Status, Throwable> errorsHandler;
 
     private ReaderSettings(Builder builder) {
         this.consumerName = builder.consumerName;
         this.readerName = builder.readerName;
         this.topics = ImmutableList.copyOf(builder.topics);
         this.maxMemoryUsageBytes = builder.maxMemoryUsageBytes;
         this.decompressionExecutor = builder.decompressionExecutor;
+        this.errorsHandler = builder.errorsHandler;
     }
 
     public String getConsumerName() {
@@ -41,6 +46,10 @@ public List<TopicReadSettings> getTopics() {
         return topics;
     }
 
+    public BiConsumer<Status, Throwable> getErrorsHandler() {
+        return errorsHandler;
+    }
+
     public long getMaxMemoryUsageBytes() {
         return maxMemoryUsageBytes;
     }
@@ -63,6 +72,7 @@ public static class Builder {
         private List<TopicReadSettings> topics = new ArrayList<>();
         private long maxMemoryUsageBytes = MAX_MEMORY_USAGE_BYTES_DEFAULT;
         private Executor decompressionExecutor = null;
+        private BiConsumer<Status, Throwable> errorsHandler = null;
 
         public Builder setConsumerName(String consumerName) {
             this.consumerName = consumerName;
@@ -103,6 +113,11 @@ public Builder setMaxMemoryUsageBytes(long maxMemoryUsageBytes) {
             return this;
         }
 
+        public Builder setErrorsHandler(BiConsumer<Status, Throwable> handler) {
+            this.errorsHandler = handler;
+            return this;
+        }
+
         /**
          * Set executor for decompression tasks.
          * If not set, default executor will be used.

topic/src/main/java/tech/ydb/topic/settings/WriterSettings.java

@@ -1,5 +1,8 @@
 package tech.ydb.topic.settings;
 
+import java.util.function.BiConsumer;
+
+import tech.ydb.core.Status;
 import tech.ydb.topic.description.Codec;
 
 /**
@@ -16,6 +19,7 @@ public class WriterSettings {
     private final Codec codec;
     private final long maxSendBufferMemorySize;
     private final int maxSendBufferMessagesCount;
+    private final BiConsumer<Status, Throwable> errorsHandler;
 
     private WriterSettings(Builder builder) {
         this.topicPath = builder.topicPath;
@@ -25,6 +29,7 @@ private WriterSettings(Builder builder) {
         this.codec = builder.codec;
         this.maxSendBufferMemorySize = builder.maxSendBufferMemorySize;
         this.maxSendBufferMessagesCount = builder.maxSendBufferMessagesCount;
+        this.errorsHandler = builder.errorsHandler;
     }
 
     public static Builder newBuilder() {
@@ -43,6 +48,10 @@ public String getMessageGroupId() {
         return messageGroupId;
     }
 
+    public BiConsumer<Status, Throwable> getErrorsHandler() {
+        return errorsHandler;
+    }
+
     public Long getPartitionId() {
         return partitionId;
     }
@@ -70,6 +79,7 @@ public static class Builder {
         private Codec codec = Codec.GZIP;
         private long maxSendBufferMemorySize = MAX_MEMORY_USAGE_BYTES_DEFAULT;
         private int maxSendBufferMessagesCount = MAX_IN_FLIGHT_COUNT_DEFAULT;
+        private BiConsumer<Status, Throwable> errorsHandler = null;
 
         /**
          * Set path to a topic to write to
@@ -148,9 +158,13 @@ public Builder setMaxSendBufferMessagesCount(int maxMessagesCount) {
             return this;
         }
 
+        public Builder setErrorsHandler(BiConsumer<Status, Throwable> handler) {
+            this.errorsHandler = handler;
+            return this;
+        }
+
         public WriterSettings build() {
             return new WriterSettings(this);
         }
-
     }
 }

topic/src/main/java/tech/ydb/topic/write/impl/WriterImpl.java

@@ -66,7 +66,7 @@ public abstract class WriterImpl extends GrpcStreamRetrier {
     private CompletableFuture<WriteAck> lastAcceptedMessageFuture;
 
     public WriterImpl(TopicRpc topicRpc, WriterSettings settings, Executor compressionExecutor) {
-        super(topicRpc.getScheduler());
+        super(topicRpc.getScheduler(), settings.getErrorsHandler());
         this.topicRpc = topicRpc;
         this.settings = settings;
         this.session = new WriteSessionImpl();