stevespringett · nscuro · Oct 19, 2024
diff --git a/alpine-common/pom.xml b/alpine-common/pom.xml
@@ -35,6 +35,10 @@
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
         </dependency>
+        <dependency>
+            <groupId>io.smallrye.config</groupId>
+            <artifactId>smallrye-config-core</artifactId>
+        </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-annotations</artifactId>

diff --git a/alpine-common/src/main/java/alpine/Config.java b/alpine-common/src/main/java/alpine/Config.java
diff --git a/alpine-common/src/test/java/alpine/ConfigTest.java b/alpine-common/src/test/java/alpine/ConfigTest.java
@@ -1,32 +1,56 @@
 package alpine;
 
+import io.smallrye.config.ConfigMapping;
+import io.smallrye.config.SmallRyeConfigBuilder;
+import io.smallrye.config.SmallRyeConfigBuilderCustomizer;
+import io.smallrye.config.WithDefault;
+import org.eclipse.microprofile.config.ConfigValue;
 import org.junit.jupiter.api.AfterAll;
-import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 import org.junitpioneer.jupiter.RestoreEnvironmentVariables;
 import org.junitpioneer.jupiter.RestoreSystemProperties;
 import org.junitpioneer.jupiter.SetEnvironmentVariable;
+import org.junitpioneer.jupiter.SetSystemProperty;
 
 import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
 import java.util.Map;
+import java.util.Optional;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
 public class ConfigTest {
 
-    @AfterEach
-    public void tearDown() {
-        Config.reset();
+    @AfterAll
+    public static void tearDown() {
+        Config.reload(); // Ensure we're not affecting other tests
     }
 
-    @AfterAll
-    public static void tearDownClass() {
-        Config.getInstance().init(); // Ensure we're not affecting other tests
+    @Test
+    @RestoreEnvironmentVariables
+    @SetEnvironmentVariable(key = "ALPINE_NO_PROXY", value = "foo, bar, baz")
+    void testGetPropertyAsList() {
+        Config.reload();
+
+        assertThat(Config.getInstance().getPropertyAsList(Config.AlpineKey.NO_PROXY)).containsExactly("foo", "bar", "baz");
+    }
+
+    @Test
+    void testGetProperty() {
+        Config.reload();
+
+        // Property with default value.
+        assertThat(Config.getInstance().getProperty(Config.AlpineKey.DATABASE_URL)).isEqualTo("jdbc:h2:mem:alpine");
+
+        // Property without default value.
+        assertThat(Config.getInstance().getProperty(Config.AlpineKey.SECRET_KEY_PATH)).isNull();
     }
 
     @Test
     public void testGetPassThroughPropertiesEmpty() {
-        Config.getInstance().init();
+        Config.reload();
 
         assertThat(Config.getInstance().getPassThroughProperties("datanucleus")).isEmpty();
     }
@@ -43,21 +67,139 @@ public void testGetPassThroughPropertiesEmpty() {
     @SetEnvironmentVariable(key = "ALPINE_DATANUCLEUS_FROM_ENV", value = "fromEnv7")
     @SetEnvironmentVariable(key = "alpine_datanucleus_from_env_lowercase", value = "fromEnv8")
     @SetEnvironmentVariable(key = "Alpine_DataNucleus_From_Env_MixedCase", value = "fromEnv9")
-    public void testGetPassThroughProperties() {
+    @SetEnvironmentVariable(key = "ALPINE_DATANUCLEUS_EXPRESSION_FROM_ENV", value = "${alpine.datanucleus.from.env}")
+    public void testGetPassThroughProperties() throws Exception {
         final URL propertiesUrl = ConfigTest.class.getResource("/Config_testGetPassThroughProperties.properties");
         assertThat(propertiesUrl).isNotNull();
 
-        System.setProperty("alpine.application.properties", propertiesUrl.getPath());
+        final Path tmpPropertiesFile = Files.createTempFile(null, ".properties");
+        Files.copy(propertiesUrl.openStream(), tmpPropertiesFile, StandardCopyOption.REPLACE_EXISTING);
+
+        System.setProperty("alpine.application.properties", tmpPropertiesFile.toUri().toString());
 
-        Config.getInstance().init();
+        Config.reload();
 
         assertThat(Config.getInstance().getPassThroughProperties("datanucleus"))
                 .containsExactlyInAnyOrderEntriesOf(Map.of(
                         "datanucleus.foo", "fromEnv3", // ENV takes precedence over properties
                         "datanucleus.foo.bar", "fromEnv4", // ENV takes precedence over properties
                         "datanucleus.from.env", "fromEnv7",
-                        "datanucleus.from.props", "fromProps7"
+                        "datanucleus.from.props", "fromProps7",
+                        "datanucleus.from.env.lowercase", "fromEnv8",
+                        "datanucleus.from.env.mixedcase", "fromEnv9",
+                        "datanucleus.expression.from.props", "fromEnv3",
+                        "datanucleus.expression.from.env", "fromEnv7"
                 ));
     }
 
+    @ConfigMapping(prefix = "alpine")
+    public interface TestConfig {
+
+        DatabaseConfig database();
+
+        interface DatabaseConfig {
+
+            Optional<String> url();
+
+            @WithDefault("testUser")
+            String username();
+
+            Map<String, String> pool();
+
+        }
+
+    }
+
+    public static class ConfigBuilderCustomizer implements SmallRyeConfigBuilderCustomizer {
+
+        @Override
+        public void configBuilder(final SmallRyeConfigBuilder configBuilder) {
+            configBuilder
+                    .withMapping(TestConfig.class)
+                    .withValidateUnknown(false);
+        }
+
+    }
+
+    @Test
+    @RestoreEnvironmentVariables
+    @SetEnvironmentVariable(key = "ALPINE_DATABASE_URL", value = "jdbc:h2:mem:alpine")
+    @SetEnvironmentVariable(key = "ALPINE_DATABASE_POOL_MAX_SIZE", value = "666")
+    void testGetMapping() {
+        Config.reload();
+
+        final var testConfig = Config.getInstance().getMapping(TestConfig.class);
+        assertThat(testConfig).isNotNull();
+        assertThat(testConfig.database().url()).contains("jdbc:h2:mem:alpine");
+        assertThat(testConfig.database().username()).isEqualTo("testUser");
+        assertThat(testConfig.database().pool())
+                .containsExactlyInAnyOrderEntriesOf(Map.of("max.size", "666"));
+    }
+
+    @Test
+    @RestoreEnvironmentVariables
+    @SetEnvironmentVariable(key = "ALPINE_CONFIG_PROFILE", value = "dev")
+    @SetEnvironmentVariable(key = "ALPINE_DATABASE_URL", value = "defaultUrl")
+    @SetEnvironmentVariable(key = "_DEV_ALPINE_DATABASE_URL", value = "devUrl")
+    @SetEnvironmentVariable(key = "ALPINE_DATABASE_USERNAME", value = "defaultUser")
+    void testProfiles() {
+        Config.reload();
+
+        assertThat(Config.getInstance().getProperty(Config.AlpineKey.DATABASE_URL)).isEqualTo("devUrl");
+        assertThat(Config.getInstance().getProperty(Config.AlpineKey.DATABASE_USERNAME)).isEqualTo("defaultUser");
+    }
+
+    @Test
+    @RestoreEnvironmentVariables
+    @SetEnvironmentVariable(key = "ALPINE_DATABASE_URL", value = "defaultUrl")
+    @SetEnvironmentVariable(key = "_PROD_ALPINE_DATABASE_URL", value = "prodUrl")
+    @SetEnvironmentVariable(key = "ALPINE_DATABASE_USERNAME", value = "defaultUser")
+    void testDefaultProfile() {
+        Config.reload();
+
+        assertThat(Config.getInstance().getProperty(Config.AlpineKey.DATABASE_URL)).isEqualTo("prodUrl");
+        assertThat(Config.getInstance().getProperty(Config.AlpineKey.DATABASE_USERNAME)).isEqualTo("defaultUser");
+    }
+
+    @Test
+    @RestoreEnvironmentVariables
+    @RestoreSystemProperties
+    @SetEnvironmentVariable(key = "ALPINE_DATABASE_USERNAME", value = "envUsername")
+    @SetSystemProperty(key = "alpine.database.password", value = "propertyPassword")
+    void testGetValue() throws Exception {
+        final URL propertiesUrl = ConfigTest.class.getResource("/Config_testGetValue.properties");
+        assertThat(propertiesUrl).isNotNull();
+
+        final Path tmpPropertiesFile = Files.createTempFile(null, ".properties");
+        Files.copy(propertiesUrl.openStream(), tmpPropertiesFile, StandardCopyOption.REPLACE_EXISTING);
+
+        System.setProperty("alpine.application.properties", tmpPropertiesFile.toUri().toString());
+
+        Config.reload();
+
+        ConfigValue configValue = Config.getInstance().getDelegate().getConfigValue(Config.AlpineKey.DATABASE_URL.getPropertyName());
+        assertThat(configValue.getValue()).isEqualTo("jdbc:h2:mem:alpine");
+        assertThat(configValue.getSourceName()).matches(
+                "PropertiesConfigSource\\[source=file:.+\\.properties]");
+
+        configValue = Config.getInstance().getDelegate().getConfigValue(Config.AlpineKey.DATABASE_USERNAME.getPropertyName());
+        assertThat(configValue.getValue()).isEqualTo("envUsername");
+        assertThat(configValue.getSourceName()).isEqualTo("EnvConfigSource");
+
+        configValue = Config.getInstance().getDelegate().getConfigValue(Config.AlpineKey.DATABASE_PASSWORD.getPropertyName());
+        assertThat(configValue.getValue()).isEqualTo("propertyPassword");
+        assertThat(configValue.getSourceName()).isEqualTo("SysPropConfigSource");
+    }
+
+    @Test
+    @RestoreEnvironmentVariables
+    @SetEnvironmentVariable(key = "ALPINE_DATABASE_USERNAME", value = "dbUsername")
+    @SetEnvironmentVariable(key = "ALPINE_DATABASE_PASSWORD", value = "${alpine.database.username}-123")
+    void testExpression() {
+        Config.reload();
+
+        assertThat(Config.getInstance().getProperty(Config.AlpineKey.DATABASE_USERNAME)).isEqualTo("dbUsername");
+        assertThat(Config.getInstance().getProperty(Config.AlpineKey.DATABASE_PASSWORD)).isEqualTo("dbUsername-123");
+    }
+
 }
diff --git a/alpine-common/src/test/java/alpine/common/util/ThreadUtilTest.java b/alpine-common/src/test/java/alpine/common/util/ThreadUtilTest.java
@@ -18,24 +18,52 @@
  */
 package alpine.common.util;
 
+import alpine.Config;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 import org.junitpioneer.jupiter.RestoreEnvironmentVariables;
 import org.junitpioneer.jupiter.SetEnvironmentVariable;
 
+import java.lang.reflect.Method;
+
 class ThreadUtilTest {
 
+    private static Method configReloadMethod;
+
+    @BeforeAll
+    public static void setUp() throws Exception {
+        configReloadMethod = Config.class.getDeclaredMethod("reload");
+        configReloadMethod.setAccessible(true);
+    }
+
+    @AfterEach
+    public void tearDown() throws Exception {
+        configReloadMethod.invoke(Config.getInstance());
+    }
+
+    @AfterAll
+    public static void tearDownClass() throws Exception {
+        configReloadMethod.invoke(Config.getInstance()); // Ensure we're not affecting other tests.
+    }
+
     @Test
     @RestoreEnvironmentVariables
     @SetEnvironmentVariable(key = "ALPINE_WORKER_THREADS", value = "10")
-    void determineNumberOfWorkerThreadsStaticTest() {
+    void determineNumberOfWorkerThreadsStaticTest() throws Exception {
+        configReloadMethod.invoke(Config.getInstance());
+
         Assertions.assertEquals(10, ThreadUtil.determineNumberOfWorkerThreads());
     }
 
     @Test
     @RestoreEnvironmentVariables
     @SetEnvironmentVariable(key = "ALPINE_WORKER_THREADS", value = "0")
-    void determineNumberOfWorkerThreadsDynamicTest() {
+    void determineNumberOfWorkerThreadsDynamicTest() throws Exception {
+        configReloadMethod.invoke(Config.getInstance());
+
         Assertions.assertTrue(ThreadUtil.determineNumberOfWorkerThreads() > 0);
     }
 

diff --git a/alpine-common/src/test/resources/Config_testGetPassThroughProperties.properties b/alpine-common/src/test/resources/Config_testGetPassThroughProperties.properties
@@ -6,4 +6,5 @@ alpine.data.nucleus.foo=fromProps5
 datanucleus.foo=fromProps6
 alpine.datanucleus.from.props=fromProps7
 ALPINE.DATANUCLEUS.FROM.PROPS.UPPERCASE=fromProps8
-Alpine.DataNucleus.From.Props.MixedCase=fromProps9
+Alpine.DataNucleus.From.Props.MixedCase=fromProps9
+alpine.datanucleus.expression.from.props=${alpine.datanucleus.foo}
diff --git a/alpine-common/src/test/resources/Config_testGetValue.properties b/alpine-common/src/test/resources/Config_testGetValue.properties
@@ -0,0 +1 @@
+alpine.database.url=jdbc:h2:mem:alpine
diff --git a/...n/src/test/resources/META-INF/services/io.smallrye.config.SmallRyeConfigBuilderCustomizer b/...n/src/test/resources/META-INF/services/io.smallrye.config.SmallRyeConfigBuilderCustomizer
@@ -0,0 +1 @@
+alpine.ConfigTest$ConfigBuilderCustomizer
diff --git a/alpine-test/pom.xml b/alpine-test/pom.xml
@@ -0,0 +1,55 @@
+<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <groupId>us.springett</groupId>
+        <artifactId>alpine-parent</artifactId>
+        <version>3.2.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>alpine-test</artifactId>
+    <packaging>jar</packaging>
+    <version>3.2.0-SNAPSHOT</version>
+
+    <name>alpine-test</name>
+    <description>
+        An opinionated scaffolding library that jumpstarts Java projects with an API-first design,
+        secure defaults, and minimal dependencies.
+    </description>
+    <url>https://github.com/stevespringett/Alpine</url>
+    <inceptionYear>2016</inceptionYear>
+
+    <properties>
+        <lib.junit4.version>4.13.2</lib.junit4.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>us.springett</groupId>
+            <artifactId>alpine-common</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>provided</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>${lib.junit4.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.vintage</groupId>
+            <artifactId>junit-vintage-engine</artifactId>
+            <version>${lib.junit-jupiter.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+</project>