001 /*
002 * Copyright 2008-2015 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016 package griffon.core.env;
017
018 import org.slf4j.Logger;
019 import org.slf4j.LoggerFactory;
020
021 import java.net.URL;
022 import java.util.Properties;
023
024 import static griffon.util.GriffonNameUtils.isBlank;
025
026 /**
027 * @author Andres Almiray
028 */
029 public class GriffonEnvironment {
030 private static final Logger LOG = LoggerFactory.getLogger(GriffonEnvironment.class);
031
032 private static final String GRIFFON_IMPLEMENTATION_TITLE = "griffon-core";
033 private static final String BUILD_DATE;
034 private static final String BUILD_TIME;
035 private static final String GRIFFON_VERSION;
036
037 static {
038 String buildDate = null;
039 String buildTime = null;
040 String version = null;
041
042 try {
043 Properties griffonProperties = new Properties();
044 URL griffonPropertiesResource = GriffonEnvironment.class.getClassLoader().getResource("META-INF/griffon-core.properties");
045
046 if (griffonPropertiesResource != null) {
047 griffonProperties.load(griffonPropertiesResource.openStream());
048 buildDate = griffonProperties.getProperty("build.date");
049 buildTime = griffonProperties.getProperty("build.time");
050 version = griffonProperties.getProperty("griffon.version");
051 }
052
053 if (isBlank(buildDate) || isBlank(buildTime) || isBlank(version)) {
054 LOG.error("Unable to read Griffon version from META-INF/griffon-core.properties. Are you sure the griffon-core jar is in the classpath?");
055 buildDate = buildTime = version = "";
056 }
057 } catch (Exception e) {
058 LOG.error("Unable to read Griffon version from META-INF/griffon-core.properties. Are you sure the griffon-core jar is in the classpath? " + e.getMessage(), e);
059 buildDate = buildTime = version = "";
060 }
061
062 BUILD_DATE = buildDate;
063 BUILD_TIME = buildTime;
064 GRIFFON_VERSION = version;
065 }
066
067 private GriffonEnvironment() {
068 // disable instantiation
069 }
070
071 public static String getGriffonVersion() {
072 return GRIFFON_VERSION;
073 }
074
075 public static String getJvmVersion() {
076 StringBuilder sb = new StringBuilder();
077 sb.append(System.getProperty("java.version"))
078 .append(" (")
079 .append(System.getProperty("java.vendor"))
080 .append(" ")
081 .append(System.getProperty("java.vm.version"))
082 .append(")");
083 return sb.toString();
084 }
085
086 public static String getOsVersion() {
087 StringBuilder sb = new StringBuilder();
088 sb.append(System.getProperty("os.name"))
089 .append(" ")
090 .append(System.getProperty("os.version"))
091 .append(" ")
092 .append(System.getProperty("os.arch"));
093 return sb.toString();
094 }
095
096 public static String getBuildDateTime() {
097 return BUILD_DATE + "T" + BUILD_TIME;
098 }
099
100 public static String getBuildDate() {
101 return BUILD_DATE;
102 }
103
104 public static String getBuildTime() {
105 return BUILD_TIME;
106 }
107
108 public static String prettyPrint() {
109 padLeft("Griffon", 8, " ");
110
111 final StringBuilder sb = new StringBuilder();
112 sb.append("\n------------------------------------------------------------\n")
113 .append(padLeft("Griffon", 9, " "))
114 .append(" ")
115 .append(getGriffonVersion())
116 .append("\n------------------------------------------------------------\n\n");
117 entry("Build", getBuildDateTime(), sb);
118 entry("JVM", getJvmVersion(), sb);
119 entry("OS", getOsVersion(), sb);
120 return sb.toString();
121 }
122
123 private static void entry(String label, String version, StringBuilder sb) {
124 sb.append(padLeft(label, 8, " "))
125 .append(": ")
126 .append(version)
127 .append("\n");
128 }
129
130 private static String padLeft(String self, Number numberOfChars, String padding) {
131 int numChars = numberOfChars.intValue();
132 if (numChars <= self.length()) {
133 return self;
134 } else {
135 return getPadding(padding, numChars - self.length()) + self;
136 }
137 }
138
139 private static String getPadding(String padding, int length) {
140 if (padding.length() < length) {
141 return multiply(padding, length / padding.length() + 1).substring(0, length);
142 } else {
143 return padding.substring(0, length);
144 }
145 }
146
147 private static String multiply(String self, Number factor) {
148 int size = factor.intValue();
149 if (size == 0)
150 return "";
151 else if (size < 0) {
152 throw new IllegalArgumentException("multiply() should be called with a number of 0 or greater not: " + size);
153 }
154 StringBuilder answer = new StringBuilder(self);
155 for (int i = 1; i < size; i++) {
156 answer.append(self);
157 }
158 return answer.toString();
159 }
160 }
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