Allow users to configure subscribeTimeout for BlockingOutputStreamAsyncRequestBody.

.changes/next-release/feature-AWSSDKforJavav2-0e79eba.json

@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "AWS SDK for Java v2",
+    "contributor": "",
+    "description": "Allow users to configure `subscribeTimeout` for BlockingOutputStreamAsyncRequestBody. See [#4893](https://github.com/aws/aws-sdk-java-v2/issues/4893)"
+}

core/sdk-core/src/main/java/software/amazon/awssdk/core/async/AsyncRequestBody.java

@@ -418,6 +418,8 @@ static BlockingInputStreamAsyncRequestBody forBlockingInputStream(Long contentLe
      * <p>The caller is responsible for calling {@link OutputStream#close()} on the
      * {@link BlockingOutputStreamAsyncRequestBody#outputStream()} when writing is complete.
      *
+     * <p>By default, it will time out if streaming hasn't started within 10 seconds, and you can configure the timeout
+     * via {@link BlockingOutputStreamAsyncRequestBody#builder()}
      * <p><b>Example Usage</b>
      * <p>
      * {@snippet :
@@ -440,9 +442,12 @@ static BlockingInputStreamAsyncRequestBody forBlockingInputStream(Long contentLe
      *     // Wait for the service to respond.
      *     PutObjectResponse response = responseFuture.join();
      * }
+     * @see BlockingOutputStreamAsyncRequestBody
      */
     static BlockingOutputStreamAsyncRequestBody forBlockingOutputStream(Long contentLength) {
-        return new BlockingOutputStreamAsyncRequestBody(contentLength);
+        return BlockingOutputStreamAsyncRequestBody.builder()
+                                                   .contentLength(contentLength)
+                                                   .build();
     }
 
     /**

core/sdk-core/src/main/java/software/amazon/awssdk/core/async/BlockingOutputStreamAsyncRequestBody.java

@@ -27,6 +27,7 @@
 import software.amazon.awssdk.core.exception.NonRetryableException;
 import software.amazon.awssdk.core.internal.util.NoopSubscription;
 import software.amazon.awssdk.utils.CancellableOutputStream;
+import software.amazon.awssdk.utils.Validate;
 import software.amazon.awssdk.utils.async.OutputStreamPublisher;
 
 /**
@@ -46,13 +47,11 @@ public final class BlockingOutputStreamAsyncRequestBody implements AsyncRequestB
     private final Long contentLength;
     private final Duration subscribeTimeout;
 
-    BlockingOutputStreamAsyncRequestBody(Long contentLength) {
-        this(contentLength, Duration.ofSeconds(10));
-    }
-
-    BlockingOutputStreamAsyncRequestBody(Long contentLength, Duration subscribeTimeout) {
-        this.contentLength = contentLength;
-        this.subscribeTimeout = subscribeTimeout;
+    private BlockingOutputStreamAsyncRequestBody(Builder builder) {
+        this.contentLength = builder.contentLength;
+        this.subscribeTimeout = Validate.isPositiveOrNull(builder.subscribeTimeout, "subscribeTimeout") != null ?
+                                builder.subscribeTimeout :
+                                Duration.ofSeconds(10);
     }
 
     /**
@@ -69,6 +68,13 @@ public CancellableOutputStream outputStream() {
         return delegate;
     }
 
+    /**
+     * Creates a default builder for {@link BlockingOutputStreamAsyncRequestBody}.
+     */
+    public static Builder builder() {
+        return new Builder();
+    }
+
     @Override
     public Optional<Long> contentLength() {
         return Optional.ofNullable(contentLength);
@@ -99,4 +105,41 @@ private void waitForSubscriptionIfNeeded() {
             throw new RuntimeException("Interrupted while waiting for subscription.", e);
         }
     }
+
+    public static final class Builder {
+        private Duration subscribeTimeout;
+        private Long contentLength;
+
+        private Builder() {
+        }
+
+        /**
+         * Defines how long it should wait for this AsyncRequestBody to be subscribed (to start streaming) before timing out.
+         * By default, it's 10 seconds.
+         *
+         * <p>You may want to increase it if the request may not be executed right away.
+         *
+         * @param subscribeTimeout the timeout
+         * @return Returns a reference to this object so that method calls can be chained together.
+         */
+        public Builder subscribeTimeout(Duration subscribeTimeout) {
+            this.subscribeTimeout = subscribeTimeout;
+            return this;
+        }
+
+        /**
+         * The content length of the output stream.
+         *
+         * @param contentLength the content length
+         * @return Returns a reference to this object so that method calls can be chained together.
+         */
+        public Builder contentLength(Long contentLength) {
+            this.contentLength = contentLength;
+            return this;
+        }
+
+        public BlockingOutputStreamAsyncRequestBody build() {
+            return new BlockingOutputStreamAsyncRequestBody(this);
+        }
+    }
 }

core/sdk-core/src/test/java/software/amazon/awssdk/core/async/BlockingOutputStreamAsyncRequestBodyTest.java

@@ -50,9 +50,9 @@ public void outputStream_waitsForSubscription() throws IOException {
 
     @Test
     @Timeout(10)
-    public void outputStream_failsIfSubscriptionNeverComes()  {
+    public void outputStream_overrideSubscribeTimeout_failsIfSubscriptionNeverComes()  {
         BlockingOutputStreamAsyncRequestBody requestBody =
-            new BlockingOutputStreamAsyncRequestBody(0L, Duration.ofSeconds(1));
+            BlockingOutputStreamAsyncRequestBody.builder().contentLength(0L).subscribeTimeout(Duration.ofSeconds(1)).build();
         assertThatThrownBy(requestBody::outputStream).hasMessageContaining("The service request was not made");
     }