Rename OSGi Boot to Argeo Init and introduce logging framework.

[lgpl/argeo-commons.git] / org.argeo.init / src / org / argeo / init / osgi / Launcher.java

diff --git a/org.argeo.init/src/org/argeo/init/osgi/Launcher.java b/org.argeo.init/src/org/argeo/init/osgi/Launcher.java
new file mode 100644 (file)
index 0000000..778c08a
--- /dev/null
+++ b/org.argeo.init/src/org/argeo/init/osgi/Launcher.java
@@ -0,0 +1,132 @@
+package org.argeo.init.osgi;
+
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.osgi.framework.BundleContext;
+
+/** An OSGi launcher executing first another class in the system class path. */
+public class Launcher {
+
+       public static void main(String[] args) {
+               // Try to load system properties
+               String systemPropertiesFilePath = getProperty(OsgiBoot.PROP_ARGEO_OSGI_BOOT_SYSTEM_PROPERTIES_FILE);
+               if (systemPropertiesFilePath != null) {
+                       FileInputStream in;
+                       try {
+                               in = new FileInputStream(systemPropertiesFilePath);
+                               System.getProperties().load(in);
+                       } catch (IOException e1) {
+                               throw new RuntimeException("Cannot load system properties from " + systemPropertiesFilePath, e1);
+                       }
+                       if (in != null) {
+                               try {
+                                       in.close();
+                               } catch (Exception e) {
+                                       // silent
+                               }
+                       }
+               }
+
+               // Start main class
+               startMainClass();
+
+               // Start Equinox
+               BundleContext bundleContext = null;
+               try {
+                       bundleContext = OsgiBootUtils.launch(OsgiBootUtils.equinoxArgsToConfiguration(args)).getBundleContext();
+               } catch (Exception e) {
+                       throw new RuntimeException("Cannot start Equinox.", e);
+               }
+
+               // OSGi bootstrap
+               OsgiBoot osgiBoot = new OsgiBoot(bundleContext);
+               osgiBoot.bootstrap();
+       }
+
+       protected static void startMainClass() {
+               String className = getProperty(OsgiBoot.PROP_ARGEO_OSGI_BOOT_APPCLASS);
+               if (className == null)
+                       return;
+
+               String line = System.getProperty(OsgiBoot.PROP_ARGEO_OSGI_BOOT_APPARGS, "");
+
+               String[] uiArgs = readArgumentsFromLine(line);
+
+               try {
+                       // Launch main method using reflection
+                       Class<?> clss = Class.forName(className);
+                       Class<?>[] mainArgsClasses = new Class[] { uiArgs.getClass() };
+                       Object[] mainArgs = { uiArgs };
+                       Method mainMethod = clss.getMethod("main", mainArgsClasses);
+                       mainMethod.invoke(null, mainArgs);
+               } catch (Exception e) {
+                       throw new RuntimeException("Cannot start main class.", e);
+               }
+
+       }
+
+       /**
+        * Transform a line into an array of arguments, taking "" as single arguments.
+        * (nested \" are not supported)
+        */
+       private static String[] readArgumentsFromLine(String lineOrig) {
+               String line = lineOrig.trim();// remove trailing spaces
+               List<String> args = new ArrayList<String>();
+               StringBuffer curr = new StringBuffer("");
+               boolean inQuote = false;
+               char[] arr = line.toCharArray();
+               for (int i = 0; i < arr.length; i++) {
+                       char c = arr[i];
+                       switch (c) {
+                       case '\"':
+                               inQuote = !inQuote;
+                               break;
+                       case ' ':
+                               if (!inQuote) {// otherwise, no break: goes to default
+                                       if (curr.length() > 0) {
+                                               args.add(curr.toString());
+                                               curr = new StringBuffer("");
+                                       }
+                                       break;
+                               }
+                       default:
+                               curr.append(c);
+                               break;
+                       }
+               }
+
+               // Add last arg
+               if (curr.length() > 0) {
+                       args.add(curr.toString());
+                       curr = null;
+               }
+
+               String[] res = new String[args.size()];
+               for (int i = 0; i < args.size(); i++) {
+                       res[i] = args.get(i).toString();
+               }
+               return res;
+       }
+
+       public static String getProperty(String name, String defaultValue) {
+               final String value;
+               if (defaultValue != null)
+                       value = System.getProperty(name, defaultValue);
+               else
+                       value = System.getProperty(name);
+
+               if (value == null || value.equals(""))
+                       return null;
+               else
+                       return value;
+       }
+
+       public static String getProperty(String name) {
+               return getProperty(name, null);
+       }
+
+}