[Code Update - Chapter 12] Code update for MP GraphQL 2.0

code/chapter12/catalog/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 http://www.apache.org/xsd/maven-4.0.0.xsd">
+
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>io.microprofile.tutorial</groupId>
+  <artifactId>graphql-catalog</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <packaging>war</packaging>
+
+  <properties>
+    <!-- Setting the source and target of the Java Compiler -->
+    <maven.compiler.source>21</maven.compiler.source>
+    <maven.compiler.target>21</maven.compiler.target>
+
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+
+    <!-- Liberty configuration -->
+    <liberty.var.default.http.port>5060</liberty.var.default.http.port>
+    <liberty.var.default.https.port>5061</liberty.var.default.https.port>
+
+    <liberty.var.app.context.root>graphql-catalog</liberty.var.app.context.root>
+  </properties>
+
+  <dependencies>
+    <!-- Provided dependencies -->
+    <!-- Add Lombok dependency -->
+    <dependency>
+      <groupId>org.projectlombok</groupId>
+      <artifactId>lombok</artifactId>
+      <version>1.18.36</version>
+      <scope>provided</scope>
+    </dependency>
+
+    <!-- Adding Jakarta EE dependencies -->
+    <dependency>
+      <groupId>jakarta.platform</groupId>
+      <artifactId>jakarta.jakartaee-api</artifactId>
+      <version>10.0.0</version>
+      <scope>provided</scope>
+    </dependency>
+
+    <!-- Adding MicroProfile dependency -->
+    <dependency>
+      <groupId>org.eclipse.microprofile</groupId>
+      <artifactId>microprofile</artifactId>
+      <version>7.1</version>
+      <type>pom</type>
+      <scope>provided</scope>
+    </dependency>
+
+    <!-- MicroProfile GraphQL API -->
+    <dependency>
+      <groupId>org.eclipse.microprofile.graphql</groupId>
+      <artifactId>microprofile-graphql-api</artifactId>
+      <version>2.0</version>
+      <scope>provided</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <finalName>${project.artifactId}</finalName>
+    <plugins>
+      <!-- Liberty Maven Plugin -->
+      <plugin>
+        <groupId>io.openliberty.tools</groupId>
+        <artifactId>liberty-maven-plugin</artifactId>
+        <version>3.11.1</version>
+        <configuration>
+          <serverName>graphqlCatalogServer</serverName>
+        </configuration>
+      </plugin>
+
+      <!-- Maven War Plugin -->
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-war-plugin</artifactId>
+        <version>3.4.0</version>
+        <configuration>
+          <failOnMissingWebXml>false</failOnMissingWebXml>
+          <packagingExcludes>pom.xml</packagingExcludes>
+        </configuration>
+      </plugin>
+
+      <!-- Maven Compiler Plugin -->
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.13.0</version>
+      </plugin>
+    </plugins>
+  </build>
+</project>

code/chapter12/catalog/src/main/java/io/microprofile/tutorial/graphql/product/api/ConfigurableApi.java

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+package io.microprofile.tutorial.graphql.product.api;
+
+import org.eclipse.microprofile.config.Config;
+import org.eclipse.microprofile.config.ConfigProvider;
+import org.eclipse.microprofile.graphql.GraphQLApi;
+import org.eclipse.microprofile.graphql.Query;
+import org.eclipse.microprofile.graphql.Name;
+import org.eclipse.microprofile.graphql.Description;
+
+import jakarta.enterprise.context.ApplicationScoped;
+
+/**
+ * GraphQL API demonstrating dynamic configuration
+ */
+@GraphQLApi
+@ApplicationScoped
+@Description("Dynamic configuration API")
+public class ConfigurableApi {
+
+    @Query
+    @Description("Retrieves a configuration value by key at runtime")
+    public String getConfigValue(@Name("key") String key) {
+        Config config = ConfigProvider.getConfig();
+        return config.getOptionalValue(key, String.class)
+                     .orElse("Not configured");
+    }
+}