org.springframework.integration.samples.enricher.Main.java Source code

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Here is the source code for org.springframework.integration.samples.enricher.Main.java

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/*
 * Copyright 2002-2017 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.enricher;

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.integration.samples.enricher.domain.User;
import org.springframework.integration.samples.enricher.service.UserService;

/**
 * Starts the Spring Context and will initialize the Spring Integration routes.
 *
 * @author Gunnar Hillert
 * @author Gary Russell
 * @version 1.0
 *
 */
public final class Main {

    private static final Log LOGGER = LogFactory.getLog(Main.class);

    private static final String LINE_SEPARATOR = "\n==========================================================================";

    private static final String EMPTY_LINE = "\n                                                                          ";

    private Main() {
    }

    /**
     * Load the Spring Integration Application Context
     *
     * @param args - command line arguments
     */
    public static void main(final String... args) {

        LOGGER.info(LINE_SEPARATOR + EMPTY_LINE + "\n          Welcome to Spring Integration!                 "
                + EMPTY_LINE + "\n    For more information please visit:                   "
                + "\n    http://www.springsource.org/spring-integration       " + EMPTY_LINE + LINE_SEPARATOR);

        final AbstractApplicationContext context = new ClassPathXmlApplicationContext(
                "classpath:META-INF/spring/integration/*-context.xml");

        context.registerShutdownHook();

        final Scanner scanner = new Scanner(System.in);

        final UserService service = context.getBean(UserService.class);

        LOGGER.info(LINE_SEPARATOR + EMPTY_LINE
                + "\n    Please press 'q + Enter' to quit the application.                     " + EMPTY_LINE
                + LINE_SEPARATOR + EMPTY_LINE
                + "\n    This example illustrates the usage of the Content Enricher.           " + EMPTY_LINE
                + "\n    Usage: Please enter 1 or 2 or 3 + Enter                               " + EMPTY_LINE
                + "\n    3 different message flows are triggered. For sample 1+2 a             "
                + "\n    user object containing only the username is passed in.                "
                + "\n    For sample 3 a Map with the 'username' key is passed in and enriched  "
                + "\n    with the user object using the 'user' key.                            " + EMPTY_LINE
                + "\n    1: In the Enricher, pass the full User object to the request channel. "
                + "\n    2: In the Enricher, pass only the username to the request channel.    "
                + "\n    3: In the Enricher, pass only the username to the request channel.    " + EMPTY_LINE
                + LINE_SEPARATOR);

        while (!scanner.hasNext("q")) {

            final String input = scanner.nextLine();

            User user = new User("foo", null, null);

            if ("1".equals(input)) {

                final User fullUser = service.findUser(user);
                printUserInformation(fullUser);

            } else if ("2".equals(input)) {

                final User fullUser = service.findUserByUsername(user);
                printUserInformation(fullUser);

            } else if ("3".equals(input)) {

                final Map<String, Object> userData = new HashMap<String, Object>();
                userData.put("username", "foo_map");

                final Map<String, Object> enrichedUserData = service.findUserWithUsernameInMap(userData);

                final User fullUser = (User) enrichedUserData.get("user");

                printUserInformation(fullUser);

            } else {
                LOGGER.info("\n\n    Please enter '1', '2', or '3' <enter>:\n\n");
            }

        }

        LOGGER.info("\n\nExiting application...bye.");

        scanner.close();
        context.close();

    }

    private static void printUserInformation(User user) {

        if (user != null) {
            LOGGER.info(String.format("\n\n    User found - Username: '%s',  Email: '%s', Password: '%s'.\n\n",
                    user.getUsername(), user.getEmail(), user.getPassword()));

        } else {
            LOGGER.info("\n\n    No User found for username: 'foo'.\n\n");
        }

    }

}