rename package sonia.scm.boot to sonia.scm.lifecycle

scm-webapp/src/main/java/sonia/scm/lifecycle/InjectionContextRestartStrategy.java

@@ -0,0 +1,50 @@
+package sonia.scm.lifecycle;
+
+import com.google.common.annotations.VisibleForTesting;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import sonia.scm.event.RecreateEventBusEvent;
+import sonia.scm.event.ScmEventBus;
+
+import java.util.concurrent.atomic.AtomicLong;
+
+/**
+ * Restart strategy implementation which destroy the injection context and re initialize it.
+ */
+public class InjectionContextRestartStrategy implements RestartStrategy {
+
+  private static final AtomicLong INSTANCE_COUNTER = new AtomicLong();
+  private static final Logger LOG = LoggerFactory.getLogger(InjectionContextRestartStrategy.class);
+
+  private long waitInMs = 250L;
+
+  @VisibleForTesting
+  void setWaitInMs(long waitInMs) {
+    this.waitInMs = waitInMs;
+  }
+
+  @Override
+  public void restart(InjectionContext context) {
+    LOG.warn("destroy injection context");
+    context.destroy();
+
+    LOG.warn("send recreate eventbus event");
+    ScmEventBus.getInstance().post(new RecreateEventBusEvent());
+
+    // restart context delayed, to avoid timing problems
+    new Thread(() -> {
+      try {
+        Thread.sleep(waitInMs);
+
+        LOG.warn("reinitialize injection context");
+        context.initialize();
+
+        LOG.debug("register injection context on new eventbus");
+        ScmEventBus.getInstance().register(context);
+      } catch ( Exception ex) {
+        LOG.error("failed to restart", ex);
+      }
+    }, "Delayed-Restart-" + INSTANCE_COUNTER.incrementAndGet()).start();
+
+  }
+}