com.semsaas.utils.anyurl.App.java Source code

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Here is the source code for com.semsaas.utils.anyurl.App.java

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/*
 *    Copyright 2013 Benjamin Habegger
 *
 *  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.semsaas.utils.anyurl;

import gnu.getopt.Getopt;
import gnu.getopt.LongOpt;

import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Properties;

import org.apache.camel.CamelContext;
import org.apache.camel.ConsumerTemplate;
import org.apache.camel.ProducerTemplate;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class App {
    static Logger logger = LoggerFactory.getLogger(App.class);

    public static void main(String[] rawArgs) throws Exception {
        Properties props = new Properties();
        String args[] = processOption(rawArgs, props);

        String outputFile = props.getProperty("output");
        OutputStream os = outputFile == null ? System.out : new FileOutputStream(outputFile);

        final org.apache.camel.spring.Main main = new org.apache.camel.spring.Main();
        main.setApplicationContextUri("classpath:application.xml");

        Runtime.getRuntime().addShutdownHook(new Thread() {
            public void run() {
                try {
                    main.stop();
                } catch (Exception e) {
                }
            }
        });

        if (args.length > 0) {
            main.start();
            if (main.isStarted()) {
                CamelContext camelContext = main.getCamelContexts().get(0);

                String target = rewriteEndpoint(args[0]);
                boolean producerBased = checkProducerBased(target);

                InputStream is = null;
                if (producerBased) {
                    ProducerTemplate producer = camelContext.createProducerTemplate();
                    is = producer.requestBody(target, null, InputStream.class);
                } else {
                    ConsumerTemplate consumer = camelContext.createConsumerTemplate();
                    is = consumer.receiveBody(target, InputStream.class);
                }
                IOUtils.copy(is, os);

                main.stop();
            } else {
                System.err.println("Couldn't trigger jobs, camel wasn't started");
            }
        } else {
            logger.info("No triggers. Running indefintely");
        }
    }

    private static boolean checkProducerBased(String target) {
        return target.startsWith("http");
    }

    private static String rewriteEndpoint(String target) {
        return target.replaceFirst("^http:", "http4:").replaceFirst("^https:", "https4:");
    }

    private static String[] processOption(String[] args, Properties props) {
        LongOpt[] options = new LongOpt[] { new LongOpt("output", LongOpt.REQUIRED_ARGUMENT, null, 'o') };

        // Build auxilary structures
        HashMap<Integer, LongOpt> shortOptionMap = new HashMap<Integer, LongOpt>();
        StringBuffer decl = new StringBuffer();
        for (LongOpt o : options) {
            shortOptionMap.put(o.getVal(), o);
            decl.append((char) o.getVal());
            if (o.getHasArg() == LongOpt.OPTIONAL_ARGUMENT) {
                decl.append("::");
            } else if (o.getHasArg() == LongOpt.REQUIRED_ARGUMENT) {
                decl.append(":");
            }
        }
        Getopt g = new Getopt("anyurl", args, decl.toString(), options);

        int c = 0;
        while ((c = g.getopt()) != -1) {
            LongOpt opt = shortOptionMap.get(c);
            String optName = opt.getName();
            String optVal = g.getOptarg();
            props.put(optName, optVal);
        }

        // NB: Getopt moves non options to the end
        return Arrays.copyOfRange(args, g.getOptind(), args.length);
    }
}