/*
* Copyright 2013 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.xd.dirt.util;
import java.io.InputStreamReader;
import org.apache.commons.lang.StringUtils;
import org.springframework.util.FileCopyUtils;
/**
* Provides utilities for rendering graphical console output.
*
* @author Gunnar Hillert
* @author David Turanski
* @since 1.0
*/
public final class BannerUtils {
private static final String LINE_SEPARATOR = System
.getProperty("line.separator");
/** Prevent instantiation. */
private BannerUtils() {
throw new AssertionError();
}
/**
* Retrieves the ASCII resource "banner.txt" from the classpath. Will also use the version number from
* "MANIFEST.MF".
*
* Similar to {@link org.springframework.shell.plugin.support.DefaultBannerProvider}.
*
* @return String representing the Banner.
*/
private static String getBanner() {
final String banner = readBanner();
final String version = StringUtils.rightPad(BannerUtils.getVersion(),
33);
final StringBuilder sb = new StringBuilder();
sb.append(String.format(banner, version));
sb.append(LINE_SEPARATOR);
return sb.toString();
}
private static String readBanner() {
try {
return FileCopyUtils.copyToString(
new InputStreamReader(BannerUtils.class
.getResourceAsStream("banner.txt"))).replaceAll(
"(\\r|\\n)+", LINE_SEPARATOR);
}
catch (Exception e) {
throw new IllegalStateException("Could not read banner.txt");
}
}
public static String getVersion() {
final Package pkg = BannerUtils.class.getPackage();
String version = null;
if (pkg != null) {
version = pkg.getImplementationVersion();
}
return (version != null ? version : "Unknown Version");
}
public static String displayBanner(String containerName,
String additionalMessage) {
StringBuffer sb = new StringBuffer(LINE_SEPARATOR);
sb.append(getBanner())
.append(StringUtils.isEmpty(additionalMessage) ? ""
: additionalMessage)
.append(LINE_SEPARATOR)
.append(StringUtils.isEmpty(containerName) ? ""
: "Started : " + containerName)
.append(LINE_SEPARATOR)
.append("Documentation: https://github.com/spring-projects/spring-xd/wiki")
.append(LINE_SEPARATOR);
return sb.toString();
}
}