Add ScanningRecipe for migrate Hooks.enableAutomaticContextPropagation() to Spring property

src/main/java/org/openrewrite/java/spring/boot3/MigrateHooksToReactorContextProperty.java

@@ -0,0 +1,123 @@
+/*
+ * Copyright 2024 the original author or authors.
+ * <p>
+ * Licensed under the Moderne Source Available License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * <p>
+ * https://docs.moderne.io/licensing/moderne-source-available-license
+ * <p>
+ * 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.openrewrite.java.spring.boot3;
+
+import org.jspecify.annotations.Nullable;
+import org.openrewrite.*;
+import org.openrewrite.java.JavaIsoVisitor;
+import org.openrewrite.java.MethodMatcher;
+import org.openrewrite.java.search.UsesType;
+import org.openrewrite.java.spring.AddSpringProperty;
+import org.openrewrite.java.tree.J;
+import org.openrewrite.properties.tree.Properties;
+import org.openrewrite.yaml.tree.Yaml;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import static org.openrewrite.Preconditions.and;
+
+public class MigrateHooksToReactorContextProperty extends ScanningRecipe<AtomicBoolean> {
+    @Override
+    public String getDisplayName() {
+        return "Use `spring.reactor.context-propagation` property";
+    }
+
+    @Override
+    public String getDescription() {
+        return "Replace `Hooks.enableAutomaticContextPropagation()` with `spring.reactor.context-propagation=true`.";
+    }
+
+    @Override
+    public AtomicBoolean getInitialValue(ExecutionContext ctx) {
+        return new AtomicBoolean(false);
+    }
+
+    private static final String SPRING_BOOT_APPLICATION_FQN = "org.springframework.boot.autoconfigure.SpringBootApplication";
+    private static final String HOOKS_TYPE = "reactor.core.publisher.Hooks";
+    private static final MethodMatcher HOOKS_MATCHER = new MethodMatcher("reactor.core.publisher.Hooks enableAutomaticContextPropagation()");
+
+    @Override
+    public TreeVisitor<?, ExecutionContext> getScanner(AtomicBoolean foundHooksInSpringApp) {
+        return Preconditions.check(
+                and(
+                        new UsesType<>(SPRING_BOOT_APPLICATION_FQN, true),
+                        new UsesType<>(HOOKS_TYPE, true)
+                ),
+                new JavaIsoVisitor<ExecutionContext>() {
+                    @Override
+                    public J.MethodInvocation visitMethodInvocation(J.MethodInvocation method, ExecutionContext ctx) {
+                        J.MethodInvocation mi = super.visitMethodInvocation(method, ctx);
+
+                        if (HOOKS_MATCHER.matches(mi)) {
+                            foundHooksInSpringApp.set(true);
+                        }
+
+                        return mi;
+                    }
+                }
+        );
+    }
+
+    @Override
+    public TreeVisitor<?, ExecutionContext> getVisitor(AtomicBoolean foundHooksInSpringApp) {
+        if (!foundHooksInSpringApp.get()) {
+            return TreeVisitor.noop();
+        }
+
+        return new TreeVisitor<Tree, ExecutionContext>() {
+            @Override
+            public @Nullable Tree visit(@Nullable Tree tree, ExecutionContext ctx) {
+                if (tree instanceof J.CompilationUnit) {
+                    return new HooksRemovalVisitor().visitNonNull(tree, ctx);
+                }
+
+                if (isApplicationProperties(tree)) {
+                    return addSpringProperty(ctx, tree, "spring.reactor.context-propagation", "true");
+                }
+
+                return tree;
+            }
+        };
+    }
+
+    private static boolean isApplicationProperties(@Nullable Tree tree) {
+        return (tree instanceof Properties.File &&
+                "application.properties".equals(((Properties.File) tree).getSourcePath().getFileName().toString())) ||
+                (tree instanceof Yaml.Documents &&
+                        ((Yaml.Documents) tree).getSourcePath().getFileName().toString().matches("application\\.ya*ml"));
+    }
+
+    private static Tree addSpringProperty(ExecutionContext ctx, Tree properties, String property, String value) {
+        return new AddSpringProperty(property, value, null, null)
+                .getVisitor()
+                .visitNonNull(properties, ctx);
+    }
+
+    private static class HooksRemovalVisitor extends JavaIsoVisitor<ExecutionContext> {
+        @Override
+        public J.@Nullable MethodInvocation visitMethodInvocation(J.MethodInvocation method, ExecutionContext ctx) {
+            J.MethodInvocation mi = super.visitMethodInvocation(method, ctx);
+
+            // Only remove if we're in a @SpringBootApplication class
+            if (HOOKS_MATCHER.matches(mi)) {
+                maybeRemoveImport(HOOKS_TYPE);
+                return null;
+            }
+
+            return mi;
+        }
+    }
+}

src/testWithSpringBoot_3_2/java/org/openrewrite/java/spring/boot3/MigrateHooksToReactorContextPropertyTest.java

@@ -0,0 +1,93 @@
+/*
+ * Copyright 2024 the original author or authors.
+ * <p>
+ * Licensed under the Moderne Source Available License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * <p>
+ * https://docs.moderne.io/licensing/moderne-source-available-license
+ * <p>
+ * 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.openrewrite.java.spring.boot3;
+
+import org.junit.jupiter.api.Test;
+import org.openrewrite.DocumentExample;
+import org.openrewrite.test.RecipeSpec;
+import org.openrewrite.test.RewriteTest;
+
+import static org.openrewrite.java.Assertions.java;
+import static org.openrewrite.properties.Assertions.properties;
+
+class MigrateHooksToReactorContextPropertyTest implements RewriteTest {
+
+    @Override
+    public void defaults(RecipeSpec spec) {
+        spec.recipe(new MigrateHooksToReactorContextProperty());
+    }
+
+    @DocumentExample
+    @Test
+    void replaceMethodCallWithProperty() {
+        rewriteRun(
+          spec -> spec.recipe(new MigrateHooksToReactorContextProperty()),
+          java(
+            """
+              package org.springframework.boot.autoconfigure;
+              public @interface SpringBootApplication {}
+              """
+          ),
+          java(
+            """
+              package org.springframework.boot;
+              public class SpringApplication {
+                  public static void run(Class<?> cls, String[] args) {}
+              }
+              """
+          ),
+          java(
+            """
+              package reactor.core.publisher;
+              public class Hooks {
+                  public static void enableAutomaticContextPropagation() {}
+              }
+              """
+          ),
+          java(
+            """
+              import reactor.core.publisher.Hooks;
+              import org.springframework.boot.SpringApplication;
+              import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+              @SpringBootApplication
+              public class MyApplication {
+                  public static void main(String[] args) {
+                      Hooks.enableAutomaticContextPropagation();
+                      SpringApplication.run(MyApplication.class, args);
+                  }
+              }
+              """,
+            """
+              import org.springframework.boot.SpringApplication;
+              import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+              @SpringBootApplication
+              public class MyApplication {
+                  public static void main(String[] args) {
+                      SpringApplication.run(MyApplication.class, args);
+                  }
+              }
+              """
+          ),
+          properties(
+            "",
+            "spring.reactor.context-propagation=true",
+            spec -> spec.path("application.properties")
+          )
+        );
+    }
+}