GH-725 Fix getNames() method to properly compute available function names

Resolves #725

spring-cloud-function-samples/function-sample-functional-aws-routing/src/main/java/example/FunctionConfiguration.java

@@ -0,0 +1,59 @@
+package example;
+
+import java.util.function.Function;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.function.context.FunctionRegistration;
+import org.springframework.cloud.function.context.FunctionType;
+import org.springframework.cloud.function.context.MessageRoutingCallback;
+import org.springframework.cloud.function.context.MessageRoutingCallback.FunctionRoutingResult;
+import org.springframework.cloud.function.json.JsonMapper;
+import org.springframework.context.ApplicationContextInitializer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.support.GenericApplicationContext;
+import org.springframework.messaging.Message;
+
+@SpringBootApplication
+public class FunctionConfiguration implements ApplicationContextInitializer<GenericApplicationContext> {
+
+	/*
+	 * You need this main method or explicit <start-class>example.FunctionConfiguration</start-class>
+	 * in the POM to ensure boot plug-in makes the correct entry
+	 */
+	public static void main(String[] args) {
+		SpringApplication.run(FunctionConfiguration.class, args);
+	}
+
+	public Function<String, String> uppercase() {
+		return value -> value.toUpperCase();
+	}
+
+	public Function<String, String> reverse() {
+		return value -> new StringBuilder(value).reverse().toString();
+	}
+
+	public static class RoutingCallback implements MessageRoutingCallback {
+		@Override
+		public FunctionRoutingResult routingResult(Message<?> message) {
+			String payload = new String((byte[]) message.getPayload());
+			System.out.println("==> Will be routing based on payload: " + payload);
+			return payload.contains("uppercase")
+					? new FunctionRoutingResult("uppercase")
+							: new FunctionRoutingResult("reverse");
+		}
+	}
+
+	@Override
+	public void initialize(GenericApplicationContext applicationContext) {
+		System.out.println("==> Initializing");
+		applicationContext.registerBean(MessageRoutingCallback.class,
+				() -> new RoutingCallback());
+		applicationContext.registerBean("uppercase", FunctionRegistration.class,
+                () -> new FunctionRegistration<>(uppercase()).type(
+                        FunctionType.from(String.class).to(String.class)));
+		applicationContext.registerBean("reverse", FunctionRegistration.class,
+                () -> new FunctionRegistration<>(reverse()).type(
+                        FunctionType.from(String.class).to(String.class)));
+	}
+}

spring-cloud-function-samples/function-sample-functional-aws-routing/src/main/resources/application.properties

@@ -0,0 +1,2 @@
+logging.level.org.springframework.cloud=DEBUG
+spring.functional.enabled = false

spring-cloud-function-samples/function-sample-functional-aws-routing/src/main/resources/log4j.properties

@@ -0,0 +1,20 @@
+log4j.rootCategory=DEBUG, LAMBDA
+PID=????
+LOG_LEVEL_PATTERN=%5p
+LOG_PATTERN=[%d{yyyy-MM-dd HH:mm:ss.SSS}] boot%X{context} - ${PID} ${LOG_LEVEL_PATTERN} [%t] --- %c{1}: %m%n
+# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
+log4j.appender.LAMBDA=com.amazonaws.services.lambda.runtime.log4j.LambdaAppender
+log4j.appender.LAMBDA.layout=org.apache.log4j.PatternLayout
+log4j.appender.LAMBDA.layout.conversionPattern=${LOG_PATTERN}
+log4j.category.org.apache.catalina.startup.DigesterFactory=ERROR
+log4j.category.org.apache.catalina.util.LifecycleBase=ERROR
+log4j.category.org.apache.coyote.http11.Http11NioProtocol=WARN
+log4j.category.org.apache.sshd.common.util.SecurityUtils
+log4j.category.org.apache.tomcat.util.net.NioSelectorPool=WARN
+log4j.category.org.crsh.plugin=WARN
+log4j.category.org.crsh.ssh=WARN
+log4j.category.org.eclipse.jetty.util.component.AbstractLifeCycle=ERROR
+log4j.category.org.hibernate.validator.internal.util.Version=WARN
+log4j.category.org.springframework.boot.actuate.autoconfigure.CrshAutoConfiguration=WARN
+log4j.category.org.springframework.boot.actuate.endpoint.jmx=WARN
+log4j.category.org.thymeleaf=WARN

spring-cloud-function-samples/function-sample-functional-aws-routing/src/test/java/example/MapTests.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2012-2019 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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 example;
+
+import org.junit.jupiter.api.Test;
+
+/**
+ * @author Dave Syer
+ *
+ */
+public class MapTests {
+
+	@Test
+	public void test() {
+
+	}
+}