de.mhus.lib.core.MSystem Maven / Gradle / Ivy
package de.mhus.lib.core;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.annotation.Annotation;
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;
import java.net.URL;
import java.util.Map;
import java.util.Properties;
import java.util.TimerTask;
import de.mhus.lib.core.logging.Log;
/**
* MSystem class.
*
* @author mikehummel
* @version $Id: $Id
*/
public class MSystem {
private static Log log = Log.getLog(MSystem.class);
/**
* Returns the name of the current system. COMPUTERNAME or HOSTNAME.
*
* @return a {@link java.lang.String} object.
*/
public static String getHostname()
{
String out = System.getenv().get("COMPUTERNAME");
if (out == null)
out = System.getenv().get("HOSTNAME");
if (out == null)
{
RuntimeMXBean rt = ManagementFactory.getRuntimeMXBean();
String name = rt.getName();
out = MString.afterIndex(name, '@');
}
return out;
}
/**
* Returns the process id of the current application.
*
* @return a {@link java.lang.String} object.
*/
public static String getPid()
{
RuntimeMXBean rt = ManagementFactory.getRuntimeMXBean();
String name = rt.getName();
return MString.beforeIndex(name, '@');
}
/**
* Load and return a properties file. If the file not exists it will only
* log the impact and return a empty properties object.
*
* If the properties object is not null this instance will be used to load
* the file entries.
*
* 1. Find by system property {propertyname}.file=
* 2. Find in {current dir}
* 3. Find in {current dir}/config
* 4. Find in {CONFIGURATION}/config
* 5. Find in classpath without package name
* 6. Find in classpath with package of the owner (if set)
* 7. throw an error
*
* @param owner null or reference object for the class path
* @param properties A pre-instanciated properties object
* @param propertyFile Name of the properties file, e.g. something.properties
* @return The loaded properties instance
*/
public static Properties loadProperties(Object owner,Properties properties, String propertyFile) {
log.d("Loading properties",propertyFile);
// get resource
if (properties == null ) properties = new Properties();
try {
URL m_url = locateResource(owner,propertyFile);
if (m_url==null) {
log.w("Properties file not found",propertyFile);
return properties;
}
log.i("load",m_url);
InputStream stream = m_url.openStream();
properties.load(stream);
stream.close();
} catch (IOException e) {
log.i("Error loading properties file", propertyFile,e.toString());
//logger.t(e);
}
return properties;
}
/**
*
* 1. Find by system property {propertyname}.file=
* 2. Find in {current dir}
* 3. Find in {current dir}/config
* 4. Find in {CONFIGURATION}/config
* 5. Find in classpath without package name
* 6. Find in classpath with package of the owner (if set)
* 7. throw an error
*
* @param owner a {@link java.lang.Object} object.
* @param propertyFile a {@link java.lang.String} object.
* @throws java.io.IOException if any.
* @return a {@link java.net.URL} object.
*/
@SuppressWarnings("deprecation")
public static URL locateResource(Object owner,String propertyFile) throws IOException {
URL url = null;
String location = System.getProperty(propertyFile + ".file");
if (url == null && location != null) {
File f = new File(location);
if ( f.exists() && f.isFile() )
url = f.toURL();
}
{
File f = new File(propertyFile);
if ( f.exists() && f.isFile() )
return f.toURL();
}
{
File f = new File("config/" + propertyFile);
if ( f.exists() && f.isFile() )
return f.toURL();
}
try {
String configurationPath = System.getenv("CONFIGURATION");
if ( url == null && configurationPath != null ) {
File f = new File(configurationPath + "/" + propertyFile);
if ( f.exists() && f.isFile() )
url = f.toURL();
}
} catch (SecurityException e) {}
ClassLoader loader = Thread.currentThread().getContextClassLoader();
if (url == null && loader != null)
url = loader.getResource(propertyFile);
if (owner !=null && url == null) {
url = owner.getClass().getResource("/" + owner.getClass().getPackage().getName().replaceAll( "\\.", "/" ) + "/" + propertyFile );
}
if (owner !=null && url == null) {
url = owner.getClass().getResource( owner.getClass().getPackage().getName().replaceAll( "\\.", "/" ) + "/" + propertyFile );
}
if (url != null) return url;
throw new FileNotFoundException("Cannot locate resource: " + propertyFile);
}
/**
* makeshift system beep if awt.Toolkit.beep is not available. Works also in
* JDK 1.02.
*/
public static void beep() {
System.out.print("\007");
System.out.flush();
} // end beep
/**
* findSource.
*
* @param returns a int.
* @return a {@link java.lang.String} object.
*/
public static String findSource(int returns) {
StackTraceElement[] stack = Thread.currentThread().getStackTrace();
if (stack.length > returns)
return stack[returns].getClassName();
return "?";
}
/**
* Return the name of the main class or null if not found.
*
* @return a {@link java.lang.String} object.
*/
public static String getMainClassName()
{
for(final Map.Entry entry : System.getenv().entrySet())
{
if(entry.getKey().startsWith("JAVA_MAIN_CLASS"))
return entry.getValue();
}
return null;
}
/**
* Return the system temp directory.
*
* @return a {@link java.lang.String} object.
*/
public static String getTmpDirectory() {
return System.getProperty("java.io.tmpdir");
}
/**
* toString.
*
* @param sender a {@link java.lang.Object} object.
* @param attributes a {@link java.lang.Object} object.
* @return a {@link java.lang.String} object.
*/
public static String toString(Object sender, Object ... attributes) {
StringBuffer sb = new StringBuffer();
sb.append('[');
if (sender != null)
sb.append(sender instanceof String ? sender : sender.getClass().getSimpleName() ).append(':');
boolean first = true;
for (Object a : attributes) {
if (!first) sb.append(','); else first = false;
if (a == null)
sb.append("null");
else
sb.append(a.toString());
}
sb.append(']');
return sb.toString();
}
/**
* findAnnotation.
*
* @param clazz a {@link java.lang.Class} object.
* @param annotation a {@link java.lang.Class} object.
* @param a A object.
* @return a A object.
*/
public static A findAnnotation(Class clazz, Class annotation) {
Class current = clazz;
while (current != null) {
if (current.isAnnotationPresent(annotation))
return current.getAnnotation(annotation);
current = current.getSuperclass();
}
return null;
}
/**
* equals.
*
* @param a a {@link java.lang.Object} object.
* @param b a {@link java.lang.Object} object.
* @return a boolean.
*/
public static boolean equals(Object a, Object b) {
if (a == null && b == null) return true;
if (a == null) return false;
return a.equals(b);
}
/**
* startScript.
*
* @param dir a {@link java.io.File} object.
* @param script a {@link java.lang.String} object.
* @param timeout a long.
* @return a {@link de.mhus.lib.core.MSystem.ScriptResult} object.
*/
public static ScriptResult startScript(File dir, String script, long timeout) {
log.i("script",dir,script);
ProcessBuilder pb = new ProcessBuilder(new File(dir, script).getAbsolutePath() );
@SuppressWarnings("unused")
Map env = pb.environment();
pb.directory(dir);
ScriptResult out = new ScriptResult();
try {
Process p = pb.start();
out.output = new BufferedReader(new InputStreamReader(p.getInputStream()));
out.error = new BufferedReader(new InputStreamReader(p.getErrorStream()));
p.waitFor();
p.destroy();
out.rc = p.exitValue();
} catch (Throwable t) {
out.exception = t;
}
return out;
}
public static class ScriptResult {
public Throwable exception;
public int rc;
public BufferedReader error;
public BufferedReader output;
}
/**
* getAppIdent.
*
* @return a {@link java.lang.String} object.
* @since 3.2.9
*/
public static String getAppIdent() {
return getHostname() + ":" + getPid();
}
/**
* getObjectId.
*
* @param o a {@link java.lang.Object} object.
* @return a {@link java.lang.String} object.
* @since 3.2.9
*/
public static String getObjectId(Object o) {
if (o == null) return "null";
return o.getClass().getName() + "@" + Integer.toHexString(System.identityHashCode(o));
}
/**
* getClassName.
*
* @param obj a {@link java.lang.Object} object.
* @return a {@link java.lang.String} object.
* @since 3.2.9
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
public static String getClassName(Object obj) {
if (obj == null) return "null";
Class clazz = obj.getClass();
if (obj instanceof Class)
clazz = (Class)obj;
while (clazz != null && clazz.isAnonymousClass())
clazz = clazz.getEnclosingClass();
if (clazz == null) return "null";
return clazz.getCanonicalName();
}
}
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