Backport 1746 to release 1.18 v2

.github/scripts/update_sdk_version.sh

@@ -15,6 +15,8 @@ mvn versions:set-property -Dproperty=dapr.sdk.version -DnewVersion=$DAPR_JAVA_SD
 # BOMs are standalone (no parent), so versions:set skips them — update explicitly.
 mvn versions:set -DnewVersion=$DAPR_JAVA_SDK_VERSION -f sdk-bom/pom.xml
 mvn versions:set-property -Dproperty=dapr.sdk.version -DnewVersion=$DAPR_JAVA_SDK_VERSION -f sdk-bom/pom.xml
+# Install dapr-sdk-bom locally so dapr-spring-bom's import can resolve when loaded with -f (no reactor).
+mvn install -N -DskipTests -f sdk-bom/pom.xml
 mvn versions:set -DnewVersion=$DAPR_JAVA_SDK_VERSION -f dapr-spring/dapr-spring-bom/pom.xml
 mvn versions:set-property -Dproperty=dapr.sdk.version -DnewVersion=$DAPR_JAVA_SDK_VERSION -f dapr-spring/dapr-spring-bom/pom.xml
 mvn versions:set-property -Dproperty=dapr.sdk.alpha.version -DnewVersion=$DAPR_JAVA_SDK_ALPHA_VERSION -f sdk-tests/pom.xml

dapr-spring/dapr-spring-6-data/pom.xml

@@ -7,7 +7,7 @@
   <parent>
     <groupId>io.dapr.spring</groupId>
     <artifactId>dapr-spring-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 

dapr-spring/dapr-spring-bom/pom.xml

@@ -6,7 +6,7 @@
 
   <groupId>io.dapr.spring</groupId>
   <artifactId>dapr-spring-bom</artifactId>
-  <version>1.18.0-SNAPSHOT</version>
+  <version>1.18.0-rc-1</version>
   <packaging>pom</packaging>
   <name>dapr-spring-bom</name>
   <description>Dapr Spring Bill of Materials (BOM). Import this POM to manage versions
@@ -45,7 +45,7 @@
 
   <properties>
     <gpg.skip>true</gpg.skip>
-    <dapr.sdk.version>1.18.0-SNAPSHOT</dapr.sdk.version>
+    <dapr.sdk.version>1.18.0-rc-1</dapr.sdk.version>
   </properties>
 
   <build>

dapr-spring/dapr-spring-boot-4-autoconfigure/pom.xml

@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.dapr.spring</groupId>
     <artifactId>dapr-spring-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 

dapr-spring/dapr-spring-boot-autoconfigure/pom.xml

@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.dapr.spring</groupId>
     <artifactId>dapr-spring-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 

dapr-spring/dapr-spring-boot-observation/pom.xml

@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.dapr.spring</groupId>
     <artifactId>dapr-spring-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 

dapr-spring/dapr-spring-boot-properties/pom.xml

@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.dapr.spring</groupId>
     <artifactId>dapr-spring-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 

dapr-spring/dapr-spring-boot-starters/dapr-spring-boot-4-starter-test/pom.xml

@@ -6,7 +6,7 @@
     <parent>
       <groupId>io.dapr.spring</groupId>
       <artifactId>dapr-spring-parent</artifactId>
-      <version>1.18.0-SNAPSHOT</version>
+      <version>1.18.0-rc-1</version>
       <relativePath>../../pom.xml</relativePath>
     </parent>
 

dapr-spring/dapr-spring-boot-starters/dapr-spring-boot-4-starter/pom.xml

@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.dapr.spring</groupId>
     <artifactId>dapr-spring-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 

dapr-spring/dapr-spring-boot-starters/dapr-spring-boot-starter-test/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>io.dapr.spring</groupId>
         <artifactId>dapr-spring-parent</artifactId>
-        <version>1.18.0-SNAPSHOT</version>
+        <version>1.18.0-rc-1</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 

dapr-spring/dapr-spring-boot-starters/dapr-spring-boot-starter/pom.xml

@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.dapr.spring</groupId>
     <artifactId>dapr-spring-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 

dapr-spring/dapr-spring-boot-tests/pom.xml

@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.dapr.spring</groupId>
     <artifactId>dapr-spring-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 

dapr-spring/dapr-spring-data/pom.xml

@@ -7,7 +7,7 @@
   <parent>
     <groupId>io.dapr.spring</groupId>
     <artifactId>dapr-spring-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 

dapr-spring/dapr-spring-messaging/pom.xml

@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.dapr.spring</groupId>
     <artifactId>dapr-spring-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 

dapr-spring/dapr-spring-workflows/pom.xml

@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.dapr.spring</groupId>
     <artifactId>dapr-spring-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 

dapr-spring/pom.xml

@@ -7,7 +7,7 @@
   <parent>
     <groupId>io.dapr</groupId>
     <artifactId>dapr-sdk-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 

durabletask-client/pom.xml

@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.dapr</groupId>
     <artifactId>dapr-sdk-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 

examples/pom.xml

@@ -7,7 +7,7 @@
   <parent>
     <groupId>io.dapr</groupId>
     <artifactId>dapr-sdk-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 

examples/src/main/java/io/dapr/examples/pubsub/stream/README.md

@@ -108,6 +108,38 @@ client.subscribeToTopic(PUBSUB_NAME, topicName, TypeRef.STRING, Map.of("rawPaylo
     .blockLast();
 ```
 
+### Subscription with a Dead-Letter Topic
+
+For workloads that need to forward unprocessable messages to a dead-letter topic,
+use the listener-based `subscribeToEvents` overload that accepts a
+`deadLetterTopic` argument. When the listener returns `Status.DROP`, the Dapr
+runtime publishes the message to the configured dead-letter topic:
+
+```java
+var listener = new SubscriptionListener<String>() {
+  @Override
+  public Mono<Status> onEvent(CloudEvent<String> event) {
+    if (shouldRejectMessage(event)) {
+      return Mono.just(Status.DROP); // forwarded to deadLetterTopicName
+    }
+    return Mono.just(Status.SUCCESS);
+  }
+
+  @Override
+  public void onError(RuntimeException exception) {
+    System.out.println("Subscriber got exception: " + exception.getMessage());
+  }
+};
+
+try (var subscription = client.subscribeToEvents(
+        PUBSUB_NAME, topicName, deadLetterTopicName, listener, TypeRef.STRING)) {
+  subscription.awaitTermination();
+}
+```
+
+See [SubscriberWithDeadLetter.java](SubscriberWithDeadLetter.java) for a complete example
+that consumes the dead-letter topic in the same process.
+
 ### Subscription Lifecycle
 
 The examples use `blockLast()` to keep the subscriber running indefinitely. For production use cases requiring explicit subscription lifecycle control, you can use `.subscribe()` which returns a `Disposable` that can be disposed via `disposable.dispose()`.
@@ -138,6 +170,13 @@ Or run the CloudEvent Subscriber example:
 dapr run --resources-path ./components/pubsub --app-id subscriber -- java -jar target/dapr-java-sdk-examples-exec.jar io.dapr.examples.pubsub.stream.SubscriberCloudEvent
 ```
 
+Or run the dead-letter Subscriber example, which routes messages whose payload
+contains "fail" to a dead-letter topic and consumes both topics:
+
+```bash
+dapr run --resources-path ./components/pubsub --app-id subscriber -- java -jar target/dapr-java-sdk-examples-exec.jar io.dapr.examples.pubsub.stream.SubscriberWithDeadLetter
+```
+
 Once the subscriber is running, run the publisher in a new terminal to see the events in the subscriber's side:
 
 <!-- STEP

examples/src/main/java/io/dapr/examples/pubsub/stream/SubscriberWithDeadLetter.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright 2024 The Dapr Authors
+ * Licensed 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 io.dapr.examples.pubsub.stream;
+
+import io.dapr.client.DaprClientBuilder;
+import io.dapr.client.SubscriptionListener;
+import io.dapr.client.domain.CloudEvent;
+import io.dapr.utils.TypeRef;
+import reactor.core.publisher.Mono;
+
+/**
+ * Subscriber using bi-directional gRPC streaming with a dead-letter topic.
+ *
+ * <p>This example demonstrates how to forward failed messages to a dead-letter topic.
+ * The main listener returns {@code Status.DROP} for messages whose payload contains
+ * "fail", which causes the Dapr runtime to publish them to the configured
+ * dead-letter topic. A second subscription consumes the dead-letter topic so the
+ * forwarded messages are visible in the same process.
+ *
+ * <p>Usage:
+ * <ol>
+ *   <li>Build and install jars: {@code mvn clean install}
+ *   <li>cd [repo root]/examples
+ *   <li>Run the subscriber:
+ *       {@code dapr run --resources-path ./components/pubsub --app-id subscriber -- \
+ *         java -jar target/dapr-java-sdk-examples-exec.jar \
+ *         io.dapr.examples.pubsub.stream.SubscriberWithDeadLetter}
+ *   <li>Publish messages from another terminal, e.g. containing the word "fail" to
+ *       see them routed to the dead-letter topic.
+ * </ol>
+ */
+public class SubscriberWithDeadLetter {
+
+  private static final String DEFAULT_TOPIC_NAME = "testingtopic";
+  private static final String DEFAULT_DEAD_LETTER_TOPIC_NAME = "testingtopic-deadletter";
+  private static final String PUBSUB_NAME = "messagebus";
+
+  /**
+   * Main entry point for the dead-letter subscriber example.
+   *
+   * @param args Optional positional args: [topicName] [deadLetterTopicName].
+   * @throws Exception An Exception on startup.
+   */
+  public static void main(String[] args) throws Exception {
+    String topicName = args.length >= 1 ? args[0] : DEFAULT_TOPIC_NAME;
+    String deadLetterTopicName = args.length >= 2 ? args[1] : DEFAULT_DEAD_LETTER_TOPIC_NAME;
+
+    try (var client = new DaprClientBuilder().buildPreviewClient()) {
+      System.out.println("Subscribing to dead-letter topic: " + deadLetterTopicName);
+
+      var deadLetterListener = new SubscriptionListener<String>() {
+        @Override
+        public Mono<Status> onEvent(CloudEvent<String> event) {
+          System.out.println("Dead-letter subscriber got: " + event.getData());
+          return Mono.just(Status.SUCCESS);
+        }
+
+        @Override
+        public void onError(RuntimeException exception) {
+          System.out.println("Dead-letter subscriber got exception: " + exception.getMessage());
+        }
+      };
+
+      System.out.println("Subscribing to topic: " + topicName
+          + " (dead-letter topic: " + deadLetterTopicName + ")");
+
+      var mainListener = new SubscriptionListener<String>() {
+        @Override
+        public Mono<Status> onEvent(CloudEvent<String> event) {
+          String data = event.getData();
+          if (data != null && data.toLowerCase().contains("fail")) {
+            System.out.println("Subscriber dropping message to dead-letter: " + data);
+            return Mono.just(Status.DROP);
+          }
+          System.out.println("Subscriber got: " + data);
+          return Mono.just(Status.SUCCESS);
+        }
+
+        @Override
+        public void onError(RuntimeException exception) {
+          System.out.println("Subscriber got exception: " + exception.getMessage());
+        }
+      };
+
+      try (var deadLetterSubscription = client.subscribeToEvents(
+              PUBSUB_NAME, deadLetterTopicName, deadLetterListener, TypeRef.STRING);
+           var mainSubscription = client.subscribeToEvents(
+              PUBSUB_NAME, topicName, deadLetterTopicName, mainListener, TypeRef.STRING)) {
+        mainSubscription.awaitTermination();
+      }
+    }
+  }
+}

pom.xml

@@ -7,7 +7,7 @@
   <groupId>io.dapr</groupId>
   <artifactId>dapr-sdk-parent</artifactId>
   <packaging>pom</packaging>
-  <version>1.18.0-SNAPSHOT</version>
+  <version>1.18.0-rc-1</version>
   <name>dapr-sdk-parent</name>
   <description>SDK for Dapr.</description>
   <url>https://dapr.io</url>
@@ -18,7 +18,7 @@
     <protobuf.version>3.25.5</protobuf.version>
     <dapr.proto.baseurl>https://raw.githubusercontent.com/dapr/dapr/v1.18.0-rc.3/dapr/proto</dapr.proto.baseurl>
     <durabletask.proto.baseurl>https://raw.githubusercontent.com/dapr/durabletask-protobuf/main/protos</durabletask.proto.baseurl>
-    <dapr.sdk.version>1.18.0-SNAPSHOT</dapr.sdk.version>
+    <dapr.sdk.version>1.18.0-rc-1</dapr.sdk.version>
     <os-maven-plugin.version>1.7.1</os-maven-plugin.version>
     <maven-dependency-plugin.version>3.8.1</maven-dependency-plugin.version>
     <maven-antrun-plugin.version>3.1.0</maven-antrun-plugin.version>

sdk-actors/pom.xml

@@ -7,7 +7,7 @@
   <parent>
     <groupId>io.dapr</groupId>
     <artifactId>dapr-sdk-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 

sdk-autogen/pom.xml

@@ -7,7 +7,7 @@
   <parent>
     <groupId>io.dapr</groupId>
     <artifactId>dapr-sdk-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 

sdk-bom/pom.xml

@@ -6,7 +6,7 @@
 
   <groupId>io.dapr</groupId>
   <artifactId>dapr-sdk-bom</artifactId>
-  <version>1.18.0-SNAPSHOT</version>
+  <version>1.18.0-rc-1</version>
   <packaging>pom</packaging>
   <name>dapr-sdk-bom</name>
   <description>Dapr SDK Bill of Materials (BOM) for the core SDK modules. Import this POM
@@ -46,7 +46,7 @@
 
   <properties>
     <gpg.skip>true</gpg.skip>
-    <dapr.sdk.version>1.18.0-SNAPSHOT</dapr.sdk.version>
+    <dapr.sdk.version>1.18.0-rc-1</dapr.sdk.version>
     <!-- TODO: Remove netty-bom override once gRPC ships with Netty >= 4.1.132 (CVE-2026-33871, CVE-2026-33870) -->
     <netty.version>4.1.132.Final</netty.version>
     <jackson.version>2.21.2</jackson.version>

sdk-springboot/pom.xml

@@ -7,7 +7,7 @@
   <parent>
     <groupId>io.dapr</groupId>
     <artifactId>dapr-sdk-parent</artifactId>
-    <version>1.18.0-SNAPSHOT</version>
+    <version>1.18.0-rc-1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>