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https://issues.apache.org/jira/browse/CAMEL-11532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16266783#comment-16266783
]
ASF GitHub Bot commented on CAMEL-11532:
----------------------------------------
lburgazzoli closed pull request #2114: CAMEL-11532 Java DSL enhancement to
accept supplier and function arguments
URL: https://github.com/apache/camel/pull/2114
This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:
As this is a foreign pull request (from a fork), the diff is supplied
below (as it won't show otherwise due to GitHub magic):
diff --git
a/camel-core/src/main/java/org/apache/camel/builder/ExpressionClause.java
b/camel-core/src/main/java/org/apache/camel/builder/ExpressionClause.java
index 9e3106a9a9f..16714d4e764 100644
--- a/camel-core/src/main/java/org/apache/camel/builder/ExpressionClause.java
+++ b/camel-core/src/main/java/org/apache/camel/builder/ExpressionClause.java
@@ -20,6 +20,7 @@
import java.util.function.BiFunction;
import java.util.function.Function;
+import java.util.function.Supplier;
import org.apache.camel.Exchange;
import org.apache.camel.Expression;
import org.apache.camel.Message;
@@ -150,6 +151,17 @@ public Object evaluate(Exchange exchange) {
});
}
+ /**
+ * A functional expression of an inbound message body
+ */
+ public T body(final Supplier<Object> supplier) {
+ return delegate.expression(new ExpressionAdapter() {
+ public Object evaluate(Exchange exchange) {
+ return supplier.get();
+ }
+ });
+ }
+
/**
* A functional expression of an inbound message body and headers
*/
diff --git
a/camel-core/src/main/java/org/apache/camel/model/ProcessorDefinition.java
b/camel-core/src/main/java/org/apache/camel/model/ProcessorDefinition.java
index 0ac2474afaa..594f68dd911 100644
--- a/camel-core/src/main/java/org/apache/camel/model/ProcessorDefinition.java
+++ b/camel-core/src/main/java/org/apache/camel/model/ProcessorDefinition.java
@@ -28,6 +28,7 @@
import java.util.concurrent.ExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Function;
import java.util.function.Supplier;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
@@ -3051,6 +3052,42 @@ public Type setBody(Expression expression) {
return (Type) this;
}
+ /**
+ * <a href="http://camel.apache.org/message-translator.html";>Message
Translator EIP:</a>
+ * Adds a processor which sets the body on the IN message
+ *
+ * @param supplier the supplier that provides a value to the IN message
body
+ * @return the builder
+ */
+ public <Result> Type setBody(Supplier<Result> supplier) {
+ SetBodyDefinition answer = new SetBodyDefinition(new
ExpressionAdapter() {
+ @Override
+ public Result evaluate(Exchange exchange) {
+ return supplier.get();
+ }
+ });
+ addOutput(answer);
+ return (Type) this;
+ }
+
+ /**
+ * <a href="http://camel.apache.org/message-translator.html";>Message
Translator EIP:</a>
+ * Adds a processor which sets the body on the IN message
+ *
+ * @param function the function that provides a value to the IN message
body
+ * @return the builder
+ */
+ public <Result> Type setBody(Function<Exchange, Result> function) {
+ SetBodyDefinition answer = new SetBodyDefinition(new
ExpressionAdapter() {
+ @Override
+ public Result evaluate(Exchange exchange) {
+ return function.apply(exchange);
+ }
+ });
+ addOutput(answer);
+ return (Type) this;
+ }
+
/**
* <a href="http://camel.apache.org/message-translator.html";>Message
Translator EIP:</a>
* Adds a processor which sets the body on the OUT message
diff --git
a/camel-core/src/test/java/org/apache/camel/builder/ExpressionClauseSupplierTest.java
b/camel-core/src/test/java/org/apache/camel/builder/ExpressionClauseSupplierTest.java
new file mode 100644
index 00000000000..f104e952081
--- /dev/null
+++
b/camel-core/src/test/java/org/apache/camel/builder/ExpressionClauseSupplierTest.java
@@ -0,0 +1,48 @@
+/**
+ * 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.camel.builder;
+
+import org.apache.camel.ContextTestSupport;
+import org.apache.camel.component.mock.MockEndpoint;
+
+public class ExpressionClauseSupplierTest extends ContextTestSupport {
+
+ private static final String BODY_SUPPLIER_MSG = "I am the body supplier!";
+
+ public void testBodySupplier() throws Exception {
+ MockEndpoint functionMock1 = getMockEndpoint("mock:output1");
+ functionMock1.expectedMessageCount(1);
+ functionMock1.expectedBodyReceived().constant(BODY_SUPPLIER_MSG);
+
+ template.sendBody("direct:supplier1", "are you there?");
+
+ assertMockEndpointsSatisfied();
+ }
+
+ @Override
+ protected RouteBuilder createRouteBuilder() throws Exception {
+ return new RouteBuilder() {
+ @Override
+ public void configure() throws Exception {
+ from("direct:supplier1")
+ .transform().body(() -> BODY_SUPPLIER_MSG)
+ .to("mock:output1");
+ }
+ };
+ }
+
+}
diff --git
a/camel-core/src/test/java/org/apache/camel/model/ProcessDefinitionSetBodyTest.java
b/camel-core/src/test/java/org/apache/camel/model/ProcessDefinitionSetBodyTest.java
new file mode 100644
index 00000000000..b0248083557
--- /dev/null
+++
b/camel-core/src/test/java/org/apache/camel/model/ProcessDefinitionSetBodyTest.java
@@ -0,0 +1,56 @@
+/**
+ * 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.camel.model;
+
+import org.apache.camel.ContextTestSupport;
+import org.apache.camel.builder.RouteBuilder;
+import org.apache.camel.component.mock.MockEndpoint;
+
+public class ProcessDefinitionSetBodyTest extends ContextTestSupport {
+
+ private static final String SUPPLIER_MESSAGE = "Hello from a Supplier!";
+ private static final String FUNCTION_MESSAGE = "Hello from a Function!";
+
+ public void testProcessDefinitionSetBody() throws InterruptedException {
+
+ MockEndpoint functionMock1 = getMockEndpoint("mock:supplierOutput");
+ functionMock1.expectedMessageCount(1);
+ functionMock1.expectedBodyReceived().constant(SUPPLIER_MESSAGE);
+ MockEndpoint functionMock2 = getMockEndpoint("mock:functionOutput");
+ functionMock2.expectedMessageCount(1);
+ functionMock2.expectedBodyReceived().constant(FUNCTION_MESSAGE);
+
+ template.sendBody("direct:start", "are you there?");
+
+ assertMockEndpointsSatisfied();
+ }
+
+ @Override
+ protected RouteBuilder createRouteBuilder() throws Exception {
+ return new RouteBuilder() {
+ @Override
+ public void configure() throws Exception {
+ from("direct:start")
+ .setBody(() -> SUPPLIER_MESSAGE)
+ .to("mock:supplierOutput")
+ .setBody(exchange -> FUNCTION_MESSAGE)
+ .to("mock:functionOutput")
+ .to("mock:output");
+ }
+ };
+ }
+}
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> java 8 dsl : allow to set the body using a supplier
> ----------------------------------------------------
>
> Key: CAMEL-11532
> URL: https://issues.apache.org/jira/browse/CAMEL-11532
> Project: Camel
> Issue Type: Improvement
> Components: camel-core
> Reporter: Luca Burgazzoli
> Assignee: Luca Burgazzoli
> Priority: Minor
> Fix For: 2.21.0
>
>
> Example:
> {code:java}
> from("timer")
> .setBody(User::new);
> from("timer")
> .trasform()
> .body(User::new);
> {code}
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