diff options
Diffstat (limited to 'src/main/java/org/openslx/util/AppUtil.java')
| -rw-r--r-- | src/main/java/org/openslx/util/AppUtil.java | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/src/main/java/org/openslx/util/AppUtil.java b/src/main/java/org/openslx/util/AppUtil.java new file mode 100644 index 0000000..340dc21 --- /dev/null +++ b/src/main/java/org/openslx/util/AppUtil.java @@ -0,0 +1,166 @@ +package org.openslx.util; + +import java.io.InputStream; +import java.time.Instant; +import java.time.ZoneId; +import java.time.format.DateTimeFormatter; +import java.util.jar.Attributes; +import java.util.jar.JarInputStream; +import java.util.jar.Manifest; + +import org.apache.logging.log4j.LogManager; +import org.apache.logging.log4j.Logger; + +public class AppUtil +{ + + private final static Logger LOGGER = LogManager.getLogger( AppUtil.class ); + + private static final int PROPERTY_MAX_WIDTH = 30; + + private static final String MANIFEST_REVISION_VERSION = "Revision-Version"; + private static final String MANIFEST_REVISION_BRANCH = "Revision-Branch"; + private static final String MANIFEST_BUILD_TIMESTAMP = "Build-Timestamp"; + private static final String MANIFEST_BUILD_JDK = "Build-Jdk"; + + private static final String PROPERTY_APP_NAME = "app.name"; + private static final String PROPERTY_APP_VERSION = "app.version"; + private static final String PROPERTY_APP_REVISION_VERSION = "app.revision.version"; + private static final String PROPERTY_APP_REVISION_BRANCH = "app.revision.branch"; + private static final String PROPERTY_APP_BUILD_DATE = "app.build.date"; + private static final String PROPERTY_APP_BUILD_JDK = "app.build.jdk"; + + private static final String PROPERTY_JAVA_OS_NAME = "os.name"; + private static final String PROPERTY_JAVA_OS_ARCH = "os.arch"; + + private static final String PROPERTY_JAVA_SPEC_VENDOR = "java.specification.vendor"; + private static final String PROPERTY_JAVA_SPEC_NAME = "java.specification.name"; + private static final String PROPERTY_JAVA_SPEC_VERSION = "java.specification.version"; + + private static final String PROPERTY_JAVA_VERSION = "java.version"; + private static final String PROPERTY_JAVA_VERSION_VM = "java.vm.version"; + private static final String PROPERTY_JAVA_VERSION_RUNTIME = "java.runtime.version"; + + private static final String PROPERTY_JAVA_MEMORY_LIMIT = "java.runtime.memory"; + + private static final String PROPERTY_JAVA_BITNESS = "sun.arch.data.model"; + + private static Attributes manifestAttributes = null; + + private static String getManifestValue( final String entry ) + { + if ( manifestAttributes == null ) { + InputStream jarFileStream = null; + JarInputStream jarStream = null; + // Do this so in case of failure, we won't open the jar again and again and spam exceptions to the log + manifestAttributes = new Attributes(); + + try { + jarFileStream = AppUtil.class.getProtectionDomain().getCodeSource().getLocation().openStream(); + jarStream = new JarInputStream( jarFileStream ); + final Manifest mf = jarStream.getManifest(); + manifestAttributes = mf.getMainAttributes(); + } catch ( Exception e ) { + LOGGER.warn( "Cannot read jar/manifest attributes", e ); + } finally { + Util.safeClose( jarStream, jarFileStream ); + } + } + + return manifestAttributes.getValue( entry ); + } + + public static String getRevisionVersion() + { + return AppUtil.getManifestValue( AppUtil.MANIFEST_REVISION_VERSION ); + } + + public static String getRevisionBranch() + { + return AppUtil.getManifestValue( AppUtil.MANIFEST_REVISION_BRANCH ); + } + + public static long getBuildTimestamp() + { + final String timestampRaw = AppUtil.getManifestValue( AppUtil.MANIFEST_BUILD_TIMESTAMP ); + long timestamp = 0; + + try { + timestamp = Long.valueOf( timestampRaw ); + timestamp /= 1000L; + } catch ( NumberFormatException e ) { + timestamp = 0; + } + + return timestamp; + } + + public static String getBuildTime() + { + final long timestamp = AppUtil.getBuildTimestamp(); + final String buildTime; + + if ( timestamp > 0 ) { + final Instant time = Instant.ofEpochSecond( timestamp ); + buildTime = DateTimeFormatter.RFC_1123_DATE_TIME.withZone( ZoneId.systemDefault() ).format( time ); + } else { + buildTime = null; + } + + return buildTime; + } + + public static String getBuildJdk() + { + return AppUtil.getManifestValue( AppUtil.MANIFEST_BUILD_JDK ); + } + + private static String formatProperty( final String property ) + { + return String.format( "%-" + AppUtil.PROPERTY_MAX_WIDTH + "s", property ); + } + + public static void logProperty( final Logger logger, final String propertyName, final String propertyValue ) + { + logger.info( AppUtil.formatProperty( propertyName ) + propertyValue ); + } + + public static void logJavaProperty( Logger logger, final String javaProperty ) + { + AppUtil.logProperty( logger, javaProperty, System.getProperty( javaProperty ) ); + } + + public static void logHeader( final Logger logger, final String appName, final String appVersion ) + { + // Format maximum VM memory + final String mem; + long limit = Runtime.getRuntime().maxMemory() / ( 1024l * 1024 ); + if ( limit > 99999999 ) { + mem = "-"; + } else if ( limit >= 2048 ) { + mem = String.format( "%.1fG", limit / 1024f ); + } else { + mem = limit + "M"; + } + logger.info( "-------------------------------------------------------------------------------" ); + logger.info( appName ); + logger.info( "-------------------------------------------------------------------------------" ); + logProperty( logger, AppUtil.PROPERTY_APP_NAME, appName ); + logProperty( logger, AppUtil.PROPERTY_APP_VERSION, appVersion ); + logProperty( logger, AppUtil.PROPERTY_APP_REVISION_VERSION, AppUtil.getRevisionVersion() ); + logProperty( logger, AppUtil.PROPERTY_APP_REVISION_BRANCH, AppUtil.getRevisionBranch() ); + logProperty( logger, AppUtil.PROPERTY_APP_BUILD_DATE, AppUtil.getBuildTime() ); + logProperty( logger, AppUtil.PROPERTY_APP_BUILD_JDK, AppUtil.getBuildJdk() ); + logJavaProperty( logger, AppUtil.PROPERTY_JAVA_OS_NAME ); + logJavaProperty( logger, AppUtil.PROPERTY_JAVA_SPEC_VENDOR ); + logJavaProperty( logger, AppUtil.PROPERTY_JAVA_SPEC_NAME ); + logJavaProperty( logger, AppUtil.PROPERTY_JAVA_SPEC_VERSION ); + logJavaProperty( logger, AppUtil.PROPERTY_JAVA_VERSION ); + logJavaProperty( logger, AppUtil.PROPERTY_JAVA_VERSION_VM ); + logJavaProperty( logger, AppUtil.PROPERTY_JAVA_VERSION_RUNTIME ); + logJavaProperty( logger, AppUtil.PROPERTY_JAVA_BITNESS ); + logJavaProperty( logger, AppUtil.PROPERTY_JAVA_OS_ARCH ); + logProperty( logger, AppUtil.PROPERTY_JAVA_MEMORY_LIMIT, mem ); + logger.info( "-------------------------------------------------------------------------------" ); + } +} |