Added indexer to Spring sample for #131.

Author: sapessi

samples/spring/pet-store/pom.xml

@@ -27,6 +27,8 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <spring.version>5.0.3.RELEASE</spring.version>
+        <junit.version>4.12</junit.version>
+        <log4j.version>2.8.2</log4j.version>
     </properties>
 
     <dependencies>
@@ -42,7 +44,6 @@
             <version>1.2.0</version>
         </dependency>
 
-        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-webmvc</artifactId>
@@ -55,11 +56,48 @@
             <version>${spring.version}</version>
         </dependency>
 
-        <!-- https://mvnrepository.com/artifact/io.symphonia/lambda-logging -->
+        <!--
+             the Spring Context Indexer run an annotation processor at compile time and generates
+             a META-INF/spring.components file that Spring can use to speed up component scanning at boot time.
+             For small applications, this doesn't make a big difference. However, for large applications with
+             complex dependencies this may improve your cold start time significantly.
+        -->
         <dependency>
-            <groupId>io.symphonia</groupId>
-            <artifactId>lambda-logging</artifactId>
-            <version>1.0.1</version>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-context-indexer</artifactId>
+            <version>${spring.version}</version>
+            <optional>true</optional>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-core</artifactId>
+            <version>${log4j.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-api</artifactId>
+            <version>${log4j.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.logging.log4j</groupId>
+            <artifactId>log4j-slf4j-impl</artifactId>
+            <version>${log4j.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.amazonaws</groupId>
+            <artifactId>aws-lambda-java-log4j2</artifactId>
+            <version>1.1.0</version>
+        </dependency>
+
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>${junit.version}</version>
+            <scope>test</scope>
         </dependency>
     </dependencies>
 
@@ -69,17 +107,29 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-shade-plugin</artifactId>
                 <version>2.3</version>
-                <configuration>
-                    <createDependencyReducedPom>false</createDependencyReducedPom>
-                </configuration>
                 <executions>
                     <execution>
                         <phase>package</phase>
                         <goals>
                             <goal>shade</goal>
                         </goals>
+                        <configuration>
+                            <createDependencyReducedPom>false</createDependencyReducedPom>
+                            <transformers>
+                                <transformer
+                                        implementation="com.github.edwgiz.mavenShadePlugin.log4j2CacheTransformer.PluginsCacheFileTransformer">
+                                </transformer>
+                            </transformers>
+                        </configuration>
                     </execution>
                 </executions>
+                <dependencies>
+                    <dependency>
+                        <groupId>com.github.edwgiz</groupId>
+                        <artifactId>maven-shade-plugin.log4j2-cachefile-transformer</artifactId>
+                        <version>2.8.1</version>
+                    </dependency>
+                </dependencies>
             </plugin>
         </plugins>
     </build>