/*
* Copyright 2014 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 org.springframework.integration.samples.si4demo.dsl;
import java.util.Scanner;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.social.TwitterAutoConfiguration;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.DependsOn;
import org.springframework.core.env.Environment;
import org.springframework.http.HttpMethod;
import org.springframework.integration.annotation.IntegrationComponentScan;
import org.springframework.integration.annotation.MessagingGateway;
import org.springframework.integration.channel.DirectChannel;
import org.springframework.integration.dsl.IntegrationFlow;
import org.springframework.integration.dsl.IntegrationFlows;
import org.springframework.integration.http.inbound.HttpRequestHandlingMessagingGateway;
import org.springframework.integration.http.inbound.RequestMapping;
import org.springframework.integration.ip.tcp.TcpInboundGateway;
import org.springframework.integration.ip.tcp.connection.TcpNetServerConnectionFactory;
import org.springframework.integration.json.ObjectToJsonTransformer;
import org.springframework.integration.transformer.ObjectToStringTransformer;
import org.springframework.integration.twitter.outbound.TwitterSearchOutboundGateway;
import org.springframework.messaging.MessageChannel;
import org.springframework.social.twitter.api.Twitter;
import org.springframework.social.twitter.api.impl.TwitterTemplate;
/**
*
* Spring Boot app offering telnet and http access to twitter search. Uses the Spring Integration 4.0 Java DSL extension.
* Adds a filter and only returns the first tweet.
*
* <pre class=code>
* $ telnet localhost 9876
* Trying 127.0.0.1...
* Connected to localhost.
* Escape character is '^]'.
* #springintegration
* [{"extraData":{},"id":461548132401438720,"text":"RT @gprussell: Spring Integration 4.0.0.RELEASE is out! ...
* </pre>
*
* <pre class=code>
* $ curl http://localhost:8080/foo -H"content-type:text/plain" -d '#springintegration'
* [{"extraData":{},"id":461548132401438720,"text":"RT @gprussell: Spring Integration 4.0.0.RELEASE is out! ...
* </pre>
*
* It also supports typing a hashtag into the console.
* @author Gary Russell
* @since 4.0
*
*/
@Configuration
@ComponentScan
@IntegrationComponentScan
@EnableAutoConfiguration(exclude = TwitterAutoConfiguration.class)
public class Application {
public static void main(String[] args) throws Exception {
ConfigurableApplicationContext ctx = SpringApplication.run(Application.class, args);
Scanner scanner = new Scanner(System.in);
String hashTag = scanner.nextLine();
System.out.println(ctx.getBean(Gateway.class).sendReceive(hashTag));
scanner.close();
ctx.close();
}
@MessagingGateway(defaultRequestChannel="requestChannel")
public interface Gateway {
String sendReceive(String in);
}
@Autowired
private Environment env;
@Bean
TcpNetServerConnectionFactory cf() {
return new TcpNetServerConnectionFactory(9876);
}
@Bean
TcpInboundGateway tcpGate() {
TcpInboundGateway gateway = new TcpInboundGateway();
gateway.setConnectionFactory(cf());
gateway.setRequestChannel(requestChannel());
return gateway;
}
@Bean
public HttpRequestHandlingMessagingGateway httpGate() {
HttpRequestHandlingMessagingGateway gateway = new HttpRequestHandlingMessagingGateway(true);
RequestMapping mapping = new RequestMapping();
mapping.setMethods(HttpMethod.POST);
mapping.setPathPatterns("/foo");
gateway.setRequestMapping(mapping);
gateway.setRequestChannel(requestChannel());
gateway.setRequestPayloadType(byte[].class);
return gateway;
}
@Bean
public MessageChannel requestChannel() {
return new DirectChannel();
}
@Bean
@DependsOn("errorFlow")
public IntegrationFlow flow() {
return IntegrationFlows.from("requestChannel")
.transform(new ObjectToStringTransformer())
.filter((String p) -> p.startsWith("#spring"),
f -> f.discardChannel("rejected"))
.handle(twitterGate())
.transform("payload[0]")
.transform(new ObjectToJsonTransformer())
.get();
}
@Bean
public IntegrationFlow errorFlow() {
return IntegrationFlows.from("rejected")
.transform("'Error: hashtag must start with #spring; got' + payload")
.get();
}
@Bean
public TwitterSearchOutboundGateway twitterGate() {
TwitterSearchOutboundGateway gateway = new TwitterSearchOutboundGateway(twitter());
return gateway;
}
@Bean
public Twitter twitter() {
return new TwitterTemplate(env.getProperty("twitter.oauth.consumerKey"),
env.getProperty("twitter.oauth.consumerSecret"),
env.getProperty("twitter.oauth.accessToken"),
env.getProperty("twitter.oauth.accessTokenSecret"));
}
}