feat: Add userClose flag back to StreamWriter

google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1/ConnectionWorker.java

@@ -273,6 +273,15 @@ ApiFuture<AppendRowsResponse> append(
     return appendInternal(requestBuilder.build());
   }
 
+  Boolean isUserClosed() {
+    this.lock.lock();
+    try {
+      return userClosed;
+    } finally {
+      this.lock.unlock();
+    }
+  }
+
   private ApiFuture<AppendRowsResponse> appendInternal(AppendRowsRequest message) {
     AppendRequestAndResponse requestWrapper = new AppendRequestAndResponse(message);
     if (requestWrapper.messageSize > getApiMaxRequestBytes()) {
@@ -378,8 +387,13 @@ public String getWriterId() {
   }
 
   boolean isConnectionInUnrecoverableState() {
-    // If final status is set, there's no
-    return connectionFinalStatus != null;
+    this.lock.lock();
+    try {
+      // If final status is set, there's no
+      return connectionFinalStatus != null;
+    } finally {
+      this.lock.unlock();
+    }
   }
 
   /** Close the stream writer. Shut down all resources. */
@@ -793,7 +807,7 @@ synchronized TableSchemaAndTimestamp getUpdatedSchema() {
   }
 
   // Class that wraps AppendRowsRequest and its corresponding Response future.
-  private static final class AppendRequestAndResponse {
+  static final class AppendRequestAndResponse {
     final SettableApiFuture<AppendRowsResponse> appendResult;
     final AppendRowsRequest message;
     final long messageSize;

google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1/ConnectionWorkerPool.java

@@ -379,7 +379,7 @@ private ConnectionWorker createConnectionWorker(String streamName, ProtoSchema w
     connectionWorkerPool.add(connectionWorker);
     log.info(
         String.format(
-            "Scaling up new connection for stream name: %s, pool size after scaling up %s",
+            "Scaling up new connection for stream name: %s, pool size after scaling up %d",
             streamName, connectionWorkerPool.size()));
     return connectionWorker;
   }

google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1/StreamWriter.java

@@ -22,7 +22,9 @@
 import com.google.api.gax.rpc.TransportChannelProvider;
 import com.google.auto.value.AutoOneOf;
 import com.google.auto.value.AutoValue;
+import com.google.cloud.bigquery.storage.v1.ConnectionWorker.AppendRequestAndResponse;
 import com.google.cloud.bigquery.storage.v1.ConnectionWorker.TableSchemaAndTimestamp;
+import com.google.cloud.bigquery.storage.v1.StreamWriter.SingleConnectionOrConnectionPool.Kind;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Preconditions;
 import io.grpc.Status;
@@ -36,6 +38,8 @@
 import java.util.UUID;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.locks.Lock;
 import java.util.logging.Logger;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -70,6 +74,11 @@ public class StreamWriter implements AutoCloseable {
    */
   private final String location;
 
+  /*
+   * If user has closed the StreamWriter.
+   */
+  private AtomicBoolean userClosed = new AtomicBoolean(false);
+
   /*
    * A String that uniquely identifies this writer.
    */
@@ -94,6 +103,8 @@ public class StreamWriter implements AutoCloseable {
   /** Creation timestamp of this streamwriter */
   private final long creationTimestamp;
 
+  private Lock lock;
+
   /** The maximum size of one request. Defined by the API. */
   public static long getApiMaxRequestBytes() {
     return 10L * 1000L * 1000L; // 10 megabytes (https://en.wikipedia.org/wiki/Megabyte)
@@ -363,6 +374,15 @@ public ApiFuture<AppendRowsResponse> append(ProtoRows rows) {
    * @return the append response wrapped in a future.
    */
   public ApiFuture<AppendRowsResponse> append(ProtoRows rows, long offset) {
+    if (userClosed.get()) {
+      AppendRequestAndResponse requestWrapper =
+          new AppendRequestAndResponse(AppendRowsRequest.newBuilder().build());
+      requestWrapper.appendResult.setException(
+          new StatusRuntimeException(
+              Status.fromCode(Code.FAILED_PRECONDITION)
+                  .withDescription("User slosed StreamWriter")));
+      return requestWrapper.appendResult;
+    }
     return this.singleConnectionOrConnectionPool.append(this, rows, offset);
   }
 
@@ -398,9 +418,25 @@ public String getLocation() {
     return location;
   }
 
+  /**
+   * @return if a stream writer can no longer be used for writing. It is due to either the
+   *     StreamWriter is explicitly closed or the underlying connection is broken when connection
+   *     pool is not used. Client should recreate StreamWriter in this case.
+   */
+  public boolean isDone() {
+    if (singleConnectionOrConnectionPool.getKind() == Kind.CONNECTION_WORKER) {
+      return userClosed.get()
+          || singleConnectionOrConnectionPool.connectionWorker().isConnectionInUnrecoverableState();
+    } else {
+      // With ConnectionPool, we will replace the bad connection automatically.
+      return userClosed.get();
+    }
+  }
+
   /** Close the stream writer. Shut down all resources. */
   @Override
   public void close() {
+    userClosed.set(true);
     singleConnectionOrConnectionPool.close(this);
   }
 

google-cloud-bigquerystorage/src/test/java/com/google/cloud/bigquery/storage/v1/FakeBigQueryWrite.java

@@ -18,6 +18,7 @@
 import com.google.api.gax.grpc.testing.MockGrpcService;
 import com.google.protobuf.AbstractMessage;
 import io.grpc.ServerServiceDefinition;
+import io.grpc.Status;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.concurrent.ScheduledExecutorService;
@@ -102,4 +103,8 @@ public long getConnectionCount() {
   public void setExecutor(ScheduledExecutorService executor) {
     serviceImpl.setExecutor(executor);
   }
+
+  public void setFailedStatus(Status failedStatus) {
+    serviceImpl.setFailedStatus(failedStatus);
+  }
 }

google-cloud-bigquerystorage/src/test/java/com/google/cloud/bigquery/storage/v1/FakeBigQueryWriteImpl.java

@@ -62,6 +62,7 @@ class FakeBigQueryWriteImpl extends BigQueryWriteGrpc.BigQueryWriteImplBase {
   // Record whether the first record has been seen on a connection.
   private final Map<StreamObserver<AppendRowsResponse>, Boolean> connectionToFirstRequest =
       new ConcurrentHashMap<>();
+  private Status failedStatus = Status.ABORTED;
 
   /** Class used to save the state of a possible response. */
   private static class Response {
@@ -138,6 +139,10 @@ public long getConnectionCount() {
     return connectionCount;
   }
 
+  public void setFailedStatus(Status failedStatus) {
+    this.failedStatus = failedStatus;
+  }
+
   @Override
   public StreamObserver<AppendRowsRequest> appendRows(
       final StreamObserver<AppendRowsResponse> responseObserver) {
@@ -177,10 +182,10 @@ public void onNext(AppendRowsRequest value) {
                 && recordCount % closeAfter == 0
                 && (numberTimesToClose == 0 || connectionCount <= numberTimesToClose)) {
               LOG.info("Shutting down connection from test...");
-              responseObserver.onError(Status.ABORTED.asException());
+              responseObserver.onError(failedStatus.asException());
             } else if (closeForeverAfter > 0 && recordCount > closeForeverAfter) {
               LOG.info("Shutting down connection from test...");
-              responseObserver.onError(Status.ABORTED.asException());
+              responseObserver.onError(failedStatus.asException());
             } else {
               final Response response = responses.get(offset);
               sendResponse(response, responseObserver);

google-cloud-bigquerystorage/src/test/java/com/google/cloud/bigquery/storage/v1/StreamWriterTest.java

@@ -30,6 +30,7 @@
 import com.google.api.gax.grpc.testing.MockServiceHelper;
 import com.google.api.gax.rpc.AbortedException;
 import com.google.api.gax.rpc.ApiException;
+import com.google.api.gax.rpc.InvalidArgumentException;
 import com.google.api.gax.rpc.StatusCode.Code;
 import com.google.api.gax.rpc.UnknownException;
 import com.google.cloud.bigquery.storage.test.Test.FooType;
@@ -1225,4 +1226,90 @@ public void testCloseDisconnectedStream() throws Exception {
     // Ensure closing the writer after disconnect succeeds.
     writer.close();
   }
+
+  @Test(timeout = 10000)
+  public void testStreamWriterUserCloseMultiplexing() throws Exception {
+    StreamWriter writer =
+        StreamWriter.newBuilder(TEST_STREAM_1)
+            .setWriterSchema(createProtoSchema())
+            .setEnableConnectionPool(true)
+            .setLocation("us")
+            .build();
+
+    writer.close();
+    assertTrue(writer.isDone());
+    ApiFuture<AppendRowsResponse> appendFuture1 = sendTestMessage(writer, new String[] {"A"});
+    ExecutionException ex =
+        assertThrows(
+            ExecutionException.class,
+            () -> {
+              appendFuture1.get();
+            });
+    assertEquals(
+        Status.Code.FAILED_PRECONDITION,
+        ((StatusRuntimeException) ex.getCause()).getStatus().getCode());
+  }
+
+  @Test(timeout = 10000)
+  public void testStreamWriterUserCloseNoMultiplexing() throws Exception {
+    StreamWriter writer =
+        StreamWriter.newBuilder(TEST_STREAM_1).setWriterSchema(createProtoSchema()).build();
+
+    writer.close();
+    assertTrue(writer.isDone());
+    ApiFuture<AppendRowsResponse> appendFuture1 = sendTestMessage(writer, new String[] {"A"});
+    ExecutionException ex =
+        assertThrows(
+            ExecutionException.class,
+            () -> {
+              appendFuture1.get();
+            });
+    assertEquals(
+        Status.Code.FAILED_PRECONDITION,
+        ((StatusRuntimeException) ex.getCause()).getStatus().getCode());
+  }
+
+  @Test(timeout = 10000)
+  public void testStreamWriterPermanentErrorMultiplexing() throws Exception {
+    StreamWriter writer =
+        StreamWriter.newBuilder(TEST_STREAM_1, client)
+            .setWriterSchema(createProtoSchema())
+            .setEnableConnectionPool(true)
+            .setLocation("us")
+            .build();
+    testBigQueryWrite.setCloseForeverAfter(1);
+    // Permenant errror.
+    testBigQueryWrite.setFailedStatus(Status.INVALID_ARGUMENT);
+    testBigQueryWrite.addResponse(createAppendResponse(0));
+    ApiFuture<AppendRowsResponse> appendFuture1 = sendTestMessage(writer, new String[] {"A"});
+    appendFuture1.get();
+    ApiFuture<AppendRowsResponse> appendFuture2 = sendTestMessage(writer, new String[] {"A"});
+    ExecutionException ex = assertThrows(
+        ExecutionException.class,
+        () -> {
+          appendFuture2.get();
+        });
+    assertTrue(ex.getCause() instanceof InvalidArgumentException);
+    assertFalse(writer.isDone());
+  }
+
+  @Test(timeout = 10000)
+  public void testStreamWriterPermanentErrorNoMultiplexing() throws Exception {
+    StreamWriter writer =
+        StreamWriter.newBuilder(TEST_STREAM_1, client).setWriterSchema(createProtoSchema()).build();
+    testBigQueryWrite.setCloseForeverAfter(1);
+    // Permenant errror.
+    testBigQueryWrite.setFailedStatus(Status.INVALID_ARGUMENT);
+    testBigQueryWrite.addResponse(createAppendResponse(0));
+    ApiFuture<AppendRowsResponse> appendFuture1 = sendTestMessage(writer, new String[] {"A"});
+    appendFuture1.get();
+    ApiFuture<AppendRowsResponse> appendFuture2 = sendTestMessage(writer, new String[] {"A"});
+    ExecutionException ex = assertThrows(
+        ExecutionException.class,
+        () -> {
+          appendFuture2.get();
+        });
+    assertTrue(writer.isDone());
+    assertTrue(ex.getCause() instanceof InvalidArgumentException);
+  }
 }