Java tutorial
/* * 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 com.springdeveloper.cloud.module; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.context.properties.EnableConfigurationProperties; import org.springframework.cloud.stream.annotation.EnableModule; import org.springframework.cloud.stream.annotation.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; import java.text.SimpleDateFormat; import java.util.Date; /** * @author Dave Syer * @author Glenn Renfro * */ @EnableModule(Source.class) @EnableConfigurationProperties(TimeSourceOptionsMetadata.class) public class TimeSource { @Autowired private TimeSourceOptionsMetadata options; @Bean @InboundChannelAdapter(value = Source.OUTPUT, autoStartup = "false", poller = @Poller(fixedDelay = "${fixedDelay}", maxMessagesPerPoll = "1")) public MessageSource<String> timerMessageSource() { return () -> new GenericMessage<>(new SimpleDateFormat(this.options.getFormat()).format(new Date())); } }