diff --git a/runners/core-java/src/main/java/org/apache/beam/runners/core/fn/FnDataReceiver.java b/runners/core-java/src/main/java/org/apache/beam/runners/core/fn/FnDataReceiver.java
index e9928a7051a57..639d678ad038f 100644
--- a/runners/core-java/src/main/java/org/apache/beam/runners/core/fn/FnDataReceiver.java
+++ b/runners/core-java/src/main/java/org/apache/beam/runners/core/fn/FnDataReceiver.java
@@ -27,7 +27,11 @@
*
*
Register a target with a {@link FnDataService} to gain a {@link FnDataReceiver} to which you
* may write outgoing data.
+ *
+ * @deprecated Runners should depend on the beam-runners-java-fn-execution module for this
+ * functionality.
*/
+@Deprecated
public interface FnDataReceiver extends Closeable {
void accept(T input) throws Exception;
}
diff --git a/runners/core-java/src/main/java/org/apache/beam/runners/core/fn/FnDataService.java b/runners/core-java/src/main/java/org/apache/beam/runners/core/fn/FnDataService.java
index fdde79cd4869b..2a6777e4bcd4b 100644
--- a/runners/core-java/src/main/java/org/apache/beam/runners/core/fn/FnDataService.java
+++ b/runners/core-java/src/main/java/org/apache/beam/runners/core/fn/FnDataService.java
@@ -27,7 +27,11 @@
* The {@link FnDataService} is able to forward inbound elements to a consumer and is also a
* consumer of outbound elements. Callers can register themselves as consumers for inbound elements
* or can get a handle for a consumer for outbound elements.
+ *
+ * @deprecated Runners should depend on the beam-runners-java-fn-execution module for this
+ * functionality.
*/
+@Deprecated
public interface FnDataService {
/**
diff --git a/runners/core-java/src/main/java/org/apache/beam/runners/core/fn/SdkHarnessDoFnRunner.java b/runners/core-java/src/main/java/org/apache/beam/runners/core/fn/SdkHarnessDoFnRunner.java
index ec4d3443ae91e..d27077fdde3f7 100644
--- a/runners/core-java/src/main/java/org/apache/beam/runners/core/fn/SdkHarnessDoFnRunner.java
+++ b/runners/core-java/src/main/java/org/apache/beam/runners/core/fn/SdkHarnessDoFnRunner.java
@@ -29,7 +29,13 @@
import org.apache.beam.sdk.util.WindowedValue;
import org.joda.time.Instant;
-/** Processes a bundle by sending it to an SDK harness over the Fn API. */
+/**
+ * Processes a bundle by sending it to an SDK harness over the Fn API.
+ *
+ * @deprecated Runners should interact with the Control and Data plane directly, rather than through
+ * a {@link DoFnRunner}. Consider the beam-runners-java-fn-execution artifact instead.
+ */
+@Deprecated
public class SdkHarnessDoFnRunner implements DoFnRunner {
private final SdkHarnessClient sdkHarnessClient;
diff --git a/runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/data/FnDataReceiver.java b/runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/data/FnDataReceiver.java
new file mode 100644
index 0000000000000..5573d94f769bb
--- /dev/null
+++ b/runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/data/FnDataReceiver.java
@@ -0,0 +1,27 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.beam.runners.fnexecution.data;
+
+import java.io.Closeable;
+
+/**
+ * A receiver of streamed data.
+ */
+public interface FnDataReceiver extends Closeable {
+ void accept(T input) throws Exception;
+}
diff --git a/runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/data/package-info.java b/runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/data/package-info.java
new file mode 100644
index 0000000000000..4c0a269393744
--- /dev/null
+++ b/runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/data/package-info.java
@@ -0,0 +1,23 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Utilities for a Beam runner to interact with the Fn API {@link
+ * org.apache.beam.model.fnexecution.v1.BeamFnDataGrpc Data Service} via java abstractions.
+ */
+package org.apache.beam.runners.fnexecution.data;