Listen to services right from the start of the initialization process.

[lgpl/argeo-commons.git] / org.argeo.cms / src / org / argeo / cms / internal / kernel / Activator.java

diff --git a/org.argeo.cms/src/org/argeo/cms/internal/kernel/Activator.java b/org.argeo.cms/src/org/argeo/cms/internal/kernel/Activator.java
index 4d166eaf63db619ed0b761034299a154f30cfd39..1d40c99463c07e58a35ae59b1b900040acc5f7fb 100644 (file)
--- a/org.argeo.cms/src/org/argeo/cms/internal/kernel/Activator.java
+++ b/org.argeo.cms/src/org/argeo/cms/internal/kernel/Activator.java
@@ -1,22 +1,69 @@
 package org.argeo.cms.internal.kernel;
 
+import java.util.UUID;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
 import org.osgi.framework.BundleActivator;
 import org.osgi.framework.BundleContext;
 
+/**
+ * Activates the {@link Kernel} from the provided {@link BundleContext}. Gives
+ * access to kernel information for the rest of the bundle (and only it)
+ */
 public class Activator implements BundleActivator {
-       private Kernel kernel;
+       public final static String SYSTEM_KEY_PROPERTY = "argeo.security.systemKey";
+       private final Log log = LogFactory.getLog(Activator.class);
+
+       private final static String systemKey;
+       static {
+               systemKey = UUID.randomUUID().toString();
+               System.setProperty(SYSTEM_KEY_PROPERTY, systemKey);
+       }
+
+       private static BundleContext bundleContext;
+       private static Kernel kernel;
 
        @Override
        public void start(BundleContext context) throws Exception {
+               assert bundleContext == null;
                assert kernel == null;
-               kernel = new Kernel(context);
-               kernel.init();
+               bundleContext = context;
+               try {
+                       kernel = new Kernel();
+                       kernel.init();
+               } catch (Exception e) {
+                       log.error("Cannot boot kernel", e);
+               }
        }
 
        @Override
        public void stop(BundleContext context) throws Exception {
                kernel.destroy();
                kernel = null;
+               bundleContext = null;
        }
 
+       /**
+        * Singleton interface to the {@link BundleContext} related to the calling
+        * thread.
+        * 
+        * @BundleScope
+        */
+       public static BundleContext getBundleContext() {
+               return bundleContext;
+       }
+
+       public static KernelHeader getKernelHeader() {
+               return kernel;
+       }
+
+       /**
+        * @return a String which is guaranteed to be unique between and constant
+        *         within a Java static context (typically a VM launch)
+        * @BundleScope
+        */
+       public final static String getSystemKey() {
+               return systemKey;
+       }
 }