Fix checkstyle issues to enforce it

[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 2e2bf969a93203c3beb2f7a126e2f3f04b57bb17..2649b145d0509badbcd88897ca99a83282bed6b5 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
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
+ * Copyright (c) 2013, 2017 Cisco Systems, Inc. and others.  All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
@@ -8,6 +8,9 @@
 package org.opendaylight.controller.config.manager.impl.osgi;
 
 import com.google.common.annotations.VisibleForTesting;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 import javax.management.ObjectName;
 import org.opendaylight.controller.config.api.ConflictingVersionException;
 import org.opendaylight.controller.config.api.ValidationException;
@@ -20,9 +23,8 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
- * 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, org.osgi.framework.BundleContext)}
- * functionality.
+ * Every time factory is added or removed, blank transaction is triggered to
+ * handle.
  */
 public class BlankTransactionServiceTracker implements ServiceTrackerCustomizer<ModuleFactory, Object> {
     private static final Logger LOG = LoggerFactory.getLogger(BlankTransactionServiceTracker.class);
@@ -30,36 +32,42 @@ public class BlankTransactionServiceTracker implements ServiceTrackerCustomizer<
     public static final int DEFAULT_MAX_ATTEMPTS = 10;
 
     private final BlankTransaction blankTransaction;
-    private int maxAttempts;
+    private final ExecutorService txExecutor;
+    private final int maxAttempts;
 
     public BlankTransactionServiceTracker(final ConfigRegistryImpl configRegistry) {
-        this(new BlankTransaction() {
-            @Override
-            public CommitStatus hit() throws ValidationException, ConflictingVersionException {
-                ObjectName tx = configRegistry.beginConfig(true);
-                return configRegistry.commitConfig(tx);
-            }
+        this(() -> {
+            ObjectName tx = configRegistry.beginConfig(true);
+            return configRegistry.commitConfig(tx);
         });
     }
 
     public BlankTransactionServiceTracker(final BlankTransaction blankTransaction) {
-        this(blankTransaction, DEFAULT_MAX_ATTEMPTS);
+        this(blankTransaction, DEFAULT_MAX_ATTEMPTS, Executors
+                .newSingleThreadExecutor(new ThreadFactoryBuilder().setNameFormat("config-blank-txn-%d").build()));
     }
 
     @VisibleForTesting
-    BlankTransactionServiceTracker(final BlankTransaction blankTx, final int maxAttempts) {
+    BlankTransactionServiceTracker(final BlankTransaction blankTx, final int maxAttempts,
+            final ExecutorService txExecutor) {
         this.blankTransaction = blankTx;
         this.maxAttempts = maxAttempts;
+        this.txExecutor = txExecutor;
     }
 
     @Override
-    public Object addingService(ServiceReference<ModuleFactory> moduleFactoryServiceReference) {
-        blankTransaction();
+    public Object addingService(final ServiceReference<ModuleFactory> moduleFactoryServiceReference) {
+        blankTransactionAsync();
         return null;
     }
 
-    synchronized void blankTransaction() {
-        // race condition check: config-persister might push new configuration while server is starting up.
+    private void blankTransactionAsync() {
+        txExecutor.execute(this::blankTransactionSync);
+    }
+
+    void blankTransactionSync() {
+        // race condition check: config-persister might push new configuration while
+        // server is starting up.
         ConflictingVersionException lastException = null;
         for (int i = 0; i < maxAttempts; i++) {
             try {
@@ -67,35 +75,38 @@ public class BlankTransactionServiceTracker implements ServiceTrackerCustomizer<
                 CommitStatus commitStatus = blankTransaction.hit();
                 LOG.debug("Committed blank transaction with status {}", commitStatus);
                 return;
-            } catch (ConflictingVersionException e) {
+            } catch (final ConflictingVersionException e) {
                 lastException = e;
                 try {
                     Thread.sleep(1000);
-                } catch (InterruptedException interruptedException) {
+                } catch (final InterruptedException interruptedException) {
                     Thread.currentThread().interrupt();
-                    throw new IllegalStateException(interruptedException);
+                    LOG.debug("blankTransactionSync was interrupted");
+                    return;
                 }
-            } catch (ValidationException e) {
+            } catch (final ValidationException e) {
                 LOG.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);
+
+        LOG.error("Maximal number of attempts reached and still cannot get optimistic lock from config manager",
+                lastException);
     }
 
     @Override
-    public void modifiedService(ServiceReference <ModuleFactory> moduleFactoryServiceReference, Object o) {
-        blankTransaction();
+    public void modifiedService(final ServiceReference<ModuleFactory> moduleFactoryServiceReference,
+            final Object object) {
+        blankTransactionAsync();
     }
 
     @Override
-    public void removedService(ServiceReference<ModuleFactory> moduleFactoryServiceReference, Object o) {
-        blankTransaction();
+    public void removedService(final ServiceReference<ModuleFactory> moduleFactoryServiceReference,
+            final Object object) {
+        blankTransactionAsync();
     }
 
     @VisibleForTesting
-    static interface BlankTransaction {
+    interface BlankTransaction {
         CommitStatus hit() throws ValidationException, ConflictingVersionException;
     }
 }