Java tutorial
/** * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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 org.apache.camel.component.aws.sns; import com.amazonaws.services.sns.model.PublishRequest; import com.amazonaws.services.sns.model.PublishResult; import org.apache.camel.Endpoint; import org.apache.camel.Exchange; import org.apache.camel.Message; import org.apache.camel.impl.DefaultProducer; import org.apache.camel.util.URISupport; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * A Producer which sends messages to the Amazon Web Service Simple Notification Service * <a href="http://aws.amazon.com/sns/">AWS SNS</a> */ public class SnsProducer extends DefaultProducer { private static final Logger LOG = LoggerFactory.getLogger(SnsProducer.class); public SnsProducer(Endpoint endpoint) { super(endpoint); } public void process(Exchange exchange) throws Exception { PublishRequest request = new PublishRequest(); request.setTopicArn(getConfiguration().getTopicArn()); request.setMessage(exchange.getIn().getBody(String.class)); request.setSubject(determineSubject(exchange)); LOG.trace("Sending request [{}] from exchange [{}]...", request, exchange); PublishResult result = getEndpoint().getSNSClient().publish(request); LOG.trace("Received result [{}]", result); Message message = getMessageForResponse(exchange); message.setHeader(SnsConstants.MESSAGE_ID, result.getMessageId()); } private Message getMessageForResponse(Exchange exchange) { if (exchange.getPattern().isOutCapable()) { Message out = exchange.getOut(); out.copyFrom(exchange.getIn()); return out; } return exchange.getIn(); } private String determineSubject(Exchange exchange) { String subject = exchange.getIn().getHeader(SnsConstants.SUBJECT, String.class); if (subject == null) { subject = getConfiguration().getSubject(); } return subject; } protected SnsConfiguration getConfiguration() { return getEndpoint().getConfiguration(); } @Override public String toString() { return "SnsProducer[" + URISupport.sanitizeUri(getEndpoint().getEndpointUri()) + "]"; } @Override public SnsEndpoint getEndpoint() { return (SnsEndpoint) super.getEndpoint(); } }