write /nodes/node/table/0 with ensure parents when node first appears

[controller.git] / opendaylight / config / config-manager / src / main / java / org / opendaylight / controller / config / manager / impl / osgi / BlankTransactionServiceTracker.java

diff --git a/opendaylight/config/config-manager/src/main/java/org/opendaylight/controller/config/manager/impl/osgi/BlankTransactionServiceTracker.java b/opendaylight/config/config-manager/src/main/java/org/opendaylight/controller/config/manager/impl/osgi/BlankTransactionServiceTracker.java
index de1a425ce64813f5c783c710367cee51232e66fc..720b7197ea6100b0890ee0fd4a89d5f5de9157bd 100644 (file)
--- a/opendaylight/config/config-manager/src/main/java/org/opendaylight/controller/config/manager/impl/osgi/BlankTransactionServiceTracker.java
+++ b/opendaylight/config/config-manager/src/main/java/org/opendaylight/controller/config/manager/impl/osgi/BlankTransactionServiceTracker.java
@@ -7,6 +7,8 @@
  */
 package org.opendaylight.controller.config.manager.impl.osgi;
 
+import org.opendaylight.controller.config.api.ConflictingVersionException;
+import org.opendaylight.controller.config.api.ValidationException;
 import org.opendaylight.controller.config.api.jmx.CommitStatus;
 import org.opendaylight.controller.config.manager.impl.ConfigRegistryImpl;
 import org.opendaylight.controller.config.spi.ModuleFactory;
@@ -19,7 +21,7 @@ import javax.management.ObjectName;
 
 /**
  * Every time factory is added or removed, blank transaction is triggered to handle
- * {@link org.opendaylight.controller.config.spi.ModuleFactory#getDefaultModules(org.opendaylight.controller.config.api.DependencyResolverFactory)}
+ * {@link org.opendaylight.controller.config.spi.ModuleFactory#getDefaultModules(org.opendaylight.controller.config.api.DependencyResolverFactory, org.osgi.framework.BundleContext)}
  * functionality.
  */
 public class BlankTransactionServiceTracker implements ServiceTrackerCustomizer<ModuleFactory, Object> {
@@ -37,15 +39,37 @@ public class BlankTransactionServiceTracker implements ServiceTrackerCustomizer<
         return null;
     }
 
-    private synchronized void blankTransaction() {
-        // create transaction
-        ObjectName tx = configRegistry.beginConfig();
-        CommitStatus commitStatus = configRegistry.commitConfig(tx);
-        logger.debug("Committed blank transaction with status {}", commitStatus);
+    synchronized void blankTransaction() {
+        // race condition check: config-persister might push new configuration while server is starting up.
+        ConflictingVersionException lastException = null;
+        int maxAttempts = 10;
+        for (int i = 0; i < maxAttempts; i++) {
+            try {
+                // create transaction
+                boolean blankTransaction = true;
+                ObjectName tx = configRegistry.beginConfig(blankTransaction);
+                CommitStatus commitStatus = configRegistry.commitConfig(tx);
+                logger.debug("Committed blank transaction with status {}", commitStatus);
+                return;
+            } catch (ConflictingVersionException e) {
+                lastException = e;
+                try {
+                    Thread.sleep(1000);
+                } catch (InterruptedException interruptedException) {
+                    Thread.currentThread().interrupt();
+                    throw new IllegalStateException(interruptedException);
+                }
+            } catch (ValidationException e) {
+                logger.error("Validation exception while running blank transaction indicates programming error", e);
+                throw new RuntimeException("Validation exception while running blank transaction indicates programming error", e);
+            }
+        }
+        throw new RuntimeException("Maximal number of attempts reached and still cannot get optimistic lock from " +
+                "config manager",lastException);
     }
 
     @Override
-    public void modifiedService(ServiceReference<ModuleFactory> moduleFactoryServiceReference, Object o) {
+    public void modifiedService(ServiceReference <ModuleFactory> moduleFactoryServiceReference, Object o) {
         blankTransaction();
     }