From 8be4255cbba970012eba8648349e6230a0e3ce42 Mon Sep 17 00:00:00 2001
From: Roman <32590063+oskar9247@users.noreply.github.com>
Date: Wed, 11 Mar 2020 19:43:43 +0100
Subject: [PATCH] BAEL-3497 IntelliJ Cannot Resolve Spring Boot Configuration
 Properties (#8775)

Co-authored-by: Oskar <>
---
 .../spring-boot-properties/pom.xml            |  7 ++++
 .../processor/CustomProperties.java           | 37 +++++++++++++++++++
 .../processor/DemoApplication.java            | 12 ++++++
 .../processor/PropertyBeanInjection.java      | 22 +++++++++++
 .../PropertyBeanInjectionUnitTest.java        | 24 ++++++++++++
 .../configuration-processor.properties        |  2 +
 6 files changed, 104 insertions(+)
 create mode 100644 spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configuration/processor/CustomProperties.java
 create mode 100644 spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configuration/processor/DemoApplication.java
 create mode 100644 spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configuration/processor/PropertyBeanInjection.java
 create mode 100644 spring-boot-modules/spring-boot-properties/src/test/java/com/baeldung/configuration/processor/PropertyBeanInjectionUnitTest.java
 create mode 100644 spring-boot-modules/spring-boot-properties/src/test/resources/configuration-processor.properties

diff --git a/spring-boot-modules/spring-boot-properties/pom.xml b/spring-boot-modules/spring-boot-properties/pom.xml
index 04879a5052..ec05ec1bdc 100644
--- a/spring-boot-modules/spring-boot-properties/pom.xml
+++ b/spring-boot-modules/spring-boot-properties/pom.xml
@@ -43,6 +43,12 @@
             <artifactId>httpcore</artifactId>
             <version>${httpcore.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-configuration-processor</artifactId>
+            <version>${configuration-processor.version}</version>
+            <optional>true</optional>
+        </dependency>
     </dependencies>
 
     <dependencyManagement>
@@ -121,6 +127,7 @@
         <guava.version>20.0</guava.version>
         <httpcore.version>4.4.11</httpcore.version>
         <resource.delimiter>@</resource.delimiter>
+        <configuration-processor.version>2.2.4.RELEASE</configuration-processor.version>
     </properties>
 
 </project>
diff --git a/spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configuration/processor/CustomProperties.java b/spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configuration/processor/CustomProperties.java
new file mode 100644
index 0000000000..398b7557c4
--- /dev/null
+++ b/spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configuration/processor/CustomProperties.java
@@ -0,0 +1,37 @@
+package com.baeldung.configuration.processor;
+
+import org.springframework.boot.context.properties.*;
+import org.springframework.context.annotation.*;
+
+@Configuration
+@ConfigurationProperties(prefix = "com.baeldung")
+public class CustomProperties {
+
+    /**
+     * The url to connect to.
+     */
+    String url;
+
+    /**
+     * The time to wait for the connection.
+     */
+    private int timeoutInMilliSeconds = 1000;
+
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public int getTimeoutInMilliSeconds() {
+        return timeoutInMilliSeconds;
+    }
+
+    public void setTimeoutInMilliSeconds(int timeoutInMilliSeconds) {
+        this.timeoutInMilliSeconds = timeoutInMilliSeconds;
+    }
+
+}
diff --git a/spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configuration/processor/DemoApplication.java b/spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configuration/processor/DemoApplication.java
new file mode 100644
index 0000000000..1a35de86da
--- /dev/null
+++ b/spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configuration/processor/DemoApplication.java
@@ -0,0 +1,12 @@
+package com.baeldung.configuration.processor;
+
+import org.springframework.boot.*;
+import org.springframework.boot.autoconfigure.*;
+
+@SpringBootApplication
+public class DemoApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(DemoApplication.class, args);
+    }
+}
diff --git a/spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configuration/processor/PropertyBeanInjection.java b/spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configuration/processor/PropertyBeanInjection.java
new file mode 100644
index 0000000000..3bcbf41f54
--- /dev/null
+++ b/spring-boot-modules/spring-boot-properties/src/main/java/com/baeldung/configuration/processor/PropertyBeanInjection.java
@@ -0,0 +1,22 @@
+package com.baeldung.configuration.processor;
+
+import org.springframework.beans.factory.annotation.*;
+import org.springframework.stereotype.*;
+
+@Component
+public class PropertyBeanInjection {
+
+    private final CustomProperties customProperties;
+
+    PropertyBeanInjection(@Autowired CustomProperties customProperties) {
+        this.customProperties = customProperties;
+    }
+
+    String getUrl() {
+        return customProperties.getUrl();
+    }
+
+    int getTimeoutInMilliseconds() {
+        return customProperties.getTimeoutInMilliSeconds();
+    }
+}
diff --git a/spring-boot-modules/spring-boot-properties/src/test/java/com/baeldung/configuration/processor/PropertyBeanInjectionUnitTest.java b/spring-boot-modules/spring-boot-properties/src/test/java/com/baeldung/configuration/processor/PropertyBeanInjectionUnitTest.java
new file mode 100644
index 0000000000..bdeb6547c3
--- /dev/null
+++ b/spring-boot-modules/spring-boot-properties/src/test/java/com/baeldung/configuration/processor/PropertyBeanInjectionUnitTest.java
@@ -0,0 +1,24 @@
+package com.baeldung.configuration.processor;
+
+import org.junit.jupiter.api.*;
+import org.junit.runner.*;
+import org.springframework.beans.factory.annotation.*;
+import org.springframework.boot.test.context.*;
+import org.springframework.test.context.*;
+import org.springframework.test.context.junit4.*;
+
+@RunWith(SpringRunner.class)
+@TestPropertySource("/configuration-processor.properties")
+@SpringBootTest(classes = DemoApplication.class)
+class PropertyBeanInjectionUnitTest {
+
+    @Autowired
+    private PropertyBeanInjection propertyBeanInjection;
+
+    @Test
+    void checkThatCustomPropertiesHaveTheCorrectValueFromPropertiesFile() {
+        Assertions.assertEquals("www.abc.test.com", propertyBeanInjection.getUrl());
+        Assertions.assertEquals(2000, propertyBeanInjection.getTimeoutInMilliseconds());
+    }
+
+}
diff --git a/spring-boot-modules/spring-boot-properties/src/test/resources/configuration-processor.properties b/spring-boot-modules/spring-boot-properties/src/test/resources/configuration-processor.properties
new file mode 100644
index 0000000000..00369f2eff
--- /dev/null
+++ b/spring-boot-modules/spring-boot-properties/src/test/resources/configuration-processor.properties
@@ -0,0 +1,2 @@
+com.baeldung.url=www.abc.test.com
+com.baeldung.timeout-in-milli-seconds=2000