Move samples from spring-cloud-stream

source/src/main/java/demo/TimeSource.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2015 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
+ *
+ *      http://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 demo;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.cloud.stream.annotation.EnableBinding;
+import org.springframework.cloud.stream.messaging.Source;
+import org.springframework.context.annotation.Bean;
+import org.springframework.integration.annotation.InboundChannelAdapter;
+import org.springframework.integration.annotation.Poller;
+import org.springframework.integration.core.MessageSource;
+import org.springframework.messaging.support.GenericMessage;
+
+/**
+ * @author Dave Syer
+ * @author Glenn Renfro
+ *
+ */
+@EnableBinding(Source.class)
+@EnableConfigurationProperties(TimeSourceOptionsMetadata.class)
+public class TimeSource {
+
+	@Autowired
+	private TimeSourceOptionsMetadata options;
+
+	@Bean
+	@InboundChannelAdapter(value = Source.OUTPUT, poller = @Poller(fixedDelay = "${fixedDelay}", maxMessagesPerPoll = "1"))
+	public MessageSource<String> timerMessageSource() {
+		return () -> new GenericMessage<>(new SimpleDateFormat(this.options.getFormat()).format(new Date()));
+	}
+
+}