feat(java): workflow context propagation quickstart

tutorials/workflow/java/history-propagation/README.md

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+# Workflow History Propagation
+
+This tutorial demonstrates **workflow history propagation**, a Dapr 1.18+ feature that lets a parent workflow share its execution history with child workflows and activities. Downstream services can inspect the propagated history to make trust-aware decisions — without any external state store or custom messaging. See the [Workflow history propagation](https://docs.dapr.io/developing-applications/building-blocks/workflow/workflow-history-propagation/) for the feature reference.
+
+## Scenario: Patient intake / e-prescribing
+
+A `ComplianceAuditWorkflow` and a `DispenseMedicationActivity` refuse to act unless the propagated history proves the required upstream checks (insurance, allergies, drug interactions) actually ran.
+
+```mermaid
+graph LR
+  SI((Start))
+  PI[PatientIntakeWorkflow]
+  VI[VerifyInsurance]
+  PM[PrescribeMedicationWorkflow]
+  CA[CheckAllergies]
+  SD[ScreenDrugInteractions]
+  CO[ComplianceAuditWorkflow]
+  DM[DispenseMedication]
+  EW((End))
+  SI --> PI
+  PI -->|no propagation| VI
+  PI -->|LINEAGE| PM
+  PM -->|no propagation| CA
+  PM -->|no propagation| SD
+  PM -->|LINEAGE| CO
+  PM -->|OWN_HISTORY| DM
+  CO --> DM
+  DM --> EW
+```
+
+- `PatientIntakeWorkflow` (root) calls `VerifyInsuranceActivity` (no propagation), then invokes `PrescribeMedicationWorkflow` with `propagateLineage()`.
+- `PrescribeMedicationWorkflow` receives `scope=LINEAGE` with **1 ancestor** (PatientIntake). It runs allergy and interaction checks, then calls `ComplianceAuditWorkflow` with `propagateLineage()` and `DispenseMedicationActivity` with `propagateOwnHistory()`.
+- `ComplianceAuditWorkflow` receives `scope=LINEAGE` with **2 ancestors** (PatientIntake + PrescribeMedication). It uses `getLastActivityByName(...)` to verify each required upstream activity completed, then approves.
+- `DispenseMedicationActivity` receives `scope=OWN_HISTORY` with **1 ancestor** (PrescribeMedication only). The grandparent PatientIntake is intentionally not visible (trust boundary).
+
+## Java API surface
+
+```java
+import io.dapr.durabletask.ActivityResult;
+import io.dapr.durabletask.HistoryPropagationScope;
+import io.dapr.durabletask.PropagatedHistory;
+import io.dapr.durabletask.WorkflowResult;
+import io.dapr.workflows.WorkflowTaskOptions;
+
+// Parent — propagate LINEAGE when calling a child workflow
+AuditResult audit = ctx.callChildWorkflow(
+    ComplianceAuditWorkflow.class.getName(),
+    rec,
+    /* instanceId */ null,
+    WorkflowTaskOptions.propagateLineage(),
+    AuditResult.class).await();
+
+// Parent — propagate OWN_HISTORY when calling an activity
+DispenseResult dispense = ctx.callActivity(
+    DispenseMedicationActivity.class.getName(),
+    rec,
+    WorkflowTaskOptions.propagateOwnHistory(),
+    DispenseResult.class).await();
+
+// Receiver (child workflow or activity) — read the propagated history
+Optional<PropagatedHistory> historyOpt = ctx.getPropagatedHistory();
+historyOpt.ifPresent(history -> {
+    history.getScope();         // HistoryPropagationScope (LINEAGE | OWN_HISTORY)
+    history.getWorkflows();     // List<WorkflowResult> — ancestor first, then own
+
+    Optional<WorkflowResult> intake = history.getLastWorkflowByName(
+        PatientIntakeWorkflow.class.getName());
+    intake.flatMap(wf -> wf.getLastActivityByName(VerifyInsuranceActivity.class.getName()))
+          .map(ActivityResult::isCompleted);
+});
+```
+
+## Run the tutorial
+
+1. Use a terminal to navigate to the `tutorials/workflow/java/history-propagation` folder.
+
+2. Build and run the project using Maven. This spins up a Dapr sidecar via Testcontainers.
+
+    <!-- STEP
+    name: Start the application
+    expected_stdout_lines:
+      - 'Started HistoryPropagationApplication'
+    output_match_mode: substring
+    background: true
+    sleep: 90
+    timeout_seconds: 240
+    -->
+
+    ```bash
+    mvn spring-boot:test-run
+    ```
+
+    <!-- END_STEP -->
+
+### Scenario 1 (happy path): lineage forwarded — pharmacy dispenses
+
+3. Run scenario 1 — the first POST request in the [`history-propagation.http`](./history-propagation.http) file, then poll the output endpoint:
+
+    <!-- STEP
+    name: Scenario 1 - lineage forwarded
+    expected_stdout_lines:
+      - '"dispensed":true'
+      - '"medication":"amoxicillin"'
+    output_match_mode: substring
+    timeout_seconds: 90
+    -->
+
+    ```bash
+    curl -s -X POST http://localhost:8080/start \
+      -H 'content-type: application/json' \
+      -d '{"patientId":"P-1042","name":"Jane Doe","condition":"bacterial sinusitis","medication":"amoxicillin","dosage":500,"propagateHistory":true}'
+    echo ""
+    for i in $(seq 1 30); do
+      OUT=$(curl -s http://localhost:8080/output)
+      if echo "$OUT" | grep -q '"medication":"amoxicillin"'; then
+        echo "$OUT"
+        break
+      fi
+      sleep 2
+    done
+    ```
+
+    <!-- END_STEP -->
+
+    The app logs show the propagation markers proving the feature works:
+
+    ```text
+    i.d.s.e.h.PatientIntakeWorkflow         : PROPAGATION-DEMO: root workflow received no propagated history (expected)
+    i.d.s.e.h.PrescribeMedicationWorkflow   : PROPAGATION-DEMO: scope=LINEAGE workflows=1
+    i.d.s.e.h.ComplianceAuditWorkflow       : PROPAGATION-DEMO: scope=LINEAGE workflows=2
+    i.d.s.e.h.ComplianceAuditWorkflow       :   upstream activity VerifyInsurance: completed=true
+    i.d.s.e.h.ComplianceAuditWorkflow       :   upstream activity CheckAllergies: completed=true
+    i.d.s.e.h.ComplianceAuditWorkflow       :   upstream activity ScreenDrugInteractions: completed=true
+    i.d.s.e.h.ComplianceAuditWorkflow       : APPROVED (risk=0.10, 2 workflow(s) verified)
+    i.d.s.e.h.a.DispenseMedicationActivity  : PROPAGATION-DEMO: scope=OWN_HISTORY workflows=1
+    i.d.s.e.h.a.DispenseMedicationActivity  : DISPENSED: rx-P-1042-... (amoxicillin 500mg) for patient P-1042
+    ```
+
+    The GET /output response is:
+
+    ```json
+    {"dispensed":true,"dispenseId":"rx-P-1042-<ts>","patientId":"P-1042","medication":"amoxicillin"}
+    ```
+
+### Scenario 2 (failure): lineage withheld — pharmacy refuses
+
+When `propagateHistory` is `false`, `PatientIntakeWorkflow` invokes `PrescribeMedicationWorkflow` **without** propagation options. `ComplianceAuditWorkflow` then receives no PatientIntake events in its propagated history, can't verify `VerifyInsurance` ran, and blocks the prescription.
+
+4. Run scenario 2 — the second POST request, polling the output endpoint until the failed result lands:
+
+    <!-- STEP
+    name: Scenario 2 - lineage withheld
+    expected_stdout_lines:
+      - '"dispensed":false'
+      - '"medication":"penicillin"'
+    output_match_mode: substring
+    timeout_seconds: 90
+    -->
+
+    ```bash
+    curl -s -X POST http://localhost:8080/start \
+      -H 'content-type: application/json' \
+      -d '{"patientId":"P-2087","name":"John Roe","condition":"strep throat","medication":"penicillin","dosage":500,"propagateHistory":false}'
+    echo ""
+    for i in $(seq 1 30); do
+      OUT=$(curl -s http://localhost:8080/output)
+      if echo "$OUT" | grep -q '"medication":"penicillin"'; then
+        echo "$OUT"
+        break
+      fi
+      sleep 2
+    done
+    ```
+
+    <!-- END_STEP -->
+
+    The app logs show the audit failing because it cannot find the upstream `VerifyInsurance` activity in the propagated history:
+
+    ```text
+    i.d.s.e.h.PatientIntakeWorkflow         : Calling PrescribeMedicationWorkflow WITHOUT propagation (failure scenario)
+    i.d.s.e.h.PrescribeMedicationWorkflow   : Starting prescription: penicillin 500mg for strep throat
+    i.d.s.e.h.ComplianceAuditWorkflow       : PROPAGATION-DEMO: scope=LINEAGE workflows=1
+    i.d.s.e.h.ComplianceAuditWorkflow       :   upstream activity VerifyInsurance: completed=false
+    i.d.s.e.h.ComplianceAuditWorkflow       :   upstream activity CheckAllergies: completed=true
+    i.d.s.e.h.ComplianceAuditWorkflow       :   upstream activity ScreenDrugInteractions: completed=true
+    i.d.s.e.h.ComplianceAuditWorkflow       : BLOCKED - missing upstream checks: insurance=false allergies=true interactions=true
+    i.d.s.e.h.PrescribeMedicationWorkflow   : Audit blocked dispensing - aborting prescription
+    ```
+
+    The GET /output response is:
+
+    ```json
+    {"dispensed":false,"dispenseId":null,"patientId":"P-2087","medication":"penicillin"}
+    ```
+
+5. Stop the application by pressing `Ctrl+C`.

tutorials/workflow/java/history-propagation/history-propagation.http

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+@apphost=http://localhost:8080
+
+### Scenario 1 (happy path): lineage forwarded - pharmacy dispenses
+POST {{ apphost }}/start
+Content-Type: application/json
+
+{
+  "patientId": "P-1042",
+  "name": "Jane Doe",
+  "condition": "bacterial sinusitis",
+  "medication": "amoxicillin",
+  "dosage": 500,
+  "propagateHistory": true
+}
+
+### Scenario 2 (failure): lineage withheld - ComplianceAudit refuses, dispensed=false
+POST {{ apphost }}/start
+Content-Type: application/json
+
+{
+  "patientId": "P-2087",
+  "name": "John Roe",
+  "condition": "strep throat",
+  "medication": "penicillin",
+  "dosage": 500,
+  "propagateHistory": false
+}
+
+### Get the workflow output (most recent /start)
+GET {{ apphost }}/output

tutorials/workflow/java/history-propagation/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.springframework.boot</groupId>
+    <artifactId>spring-boot-starter-parent</artifactId>
+    <version>3.4.5</version>
+    <relativePath/> <!-- lookup parent from repository -->
+  </parent>
+
+  <artifactId>history-propagation</artifactId>
+  <name>history-propagation</name>
+  <description>Workflow History Propagation Example</description>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>io.dapr.spring</groupId>
+        <artifactId>dapr-spring-bom</artifactId>
+        <version>1.18.0-rc-2</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-starter-actuator</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-starter-web</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-starter-test</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>io.dapr.spring</groupId>
+      <artifactId>dapr-spring-boot-starter</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>io.dapr.spring</groupId>
+      <artifactId>dapr-spring-boot-starter-test</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>io.rest-assured</groupId>
+      <artifactId>rest-assured</artifactId>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-maven-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
+</project>

tutorials/workflow/java/history-propagation/src/main/java/io/dapr/springboot/examples/HistoryPropagationApplication.java

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+/*
+ * Copyright 2026 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.springboot.examples;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class HistoryPropagationApplication {
+
+  public static void main(String[] args) {
+    SpringApplication.run(HistoryPropagationApplication.class, args);
+  }
+}

tutorials/workflow/java/history-propagation/src/main/java/io/dapr/springboot/examples/HistoryPropagationConfiguration.java

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+/*
+ * Copyright 2026 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.springboot.examples;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.client.RestTemplate;
+
+@Configuration
+public class HistoryPropagationConfiguration {
+
+  @Bean
+  public RestTemplate restTemplate() {
+    return new RestTemplateBuilder().build();
+  }
+
+  @Bean
+  public ObjectMapper mapper() {
+    return new ObjectMapper();
+  }
+}