X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-binding-broker%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fsal%2Fbinding%2Fcodegen%2Fimpl%2FSingletonHolder.java;h=cf754cc74e7c5b386c9b27209726d111f3ebb147;hb=d7992a5c497b98387469ec24f99f3570f517b44f;hp=ac26445bf408677b6e397c9fbb77bcf4fcaa19de;hpb=832327e85f47db63006e9bd6115ea85104124f4f;p=controller.git

diff --git a/opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/sal/binding/codegen/impl/SingletonHolder.java b/opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/sal/binding/codegen/impl/SingletonHolder.java
index ac26445bf4..cf754cc74e 100644
--- a/opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/sal/binding/codegen/impl/SingletonHolder.java
+++ b/opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/sal/binding/codegen/impl/SingletonHolder.java
@@ -10,10 +10,6 @@ package org.opendaylight.controller.sal.binding.codegen.impl;
 import com.google.common.util.concurrent.ListeningExecutorService;
 import com.google.common.util.concurrent.MoreExecutors;
 import com.google.common.util.concurrent.ThreadFactoryBuilder;
-import javassist.ClassPool;
-import org.opendaylight.controller.sal.binding.codegen.RuntimeCodeGenerator;
-import org.opendaylight.controller.sal.binding.spi.NotificationInvokerFactory;
-
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
@@ -22,8 +18,15 @@ import java.util.concurrent.RejectedExecutionHandler;
 import java.util.concurrent.ThreadFactory;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
+import javassist.ClassPool;
+import org.apache.commons.lang3.StringUtils;
+import org.opendaylight.controller.sal.binding.codegen.RuntimeCodeGenerator;
+import org.opendaylight.controller.sal.binding.spi.NotificationInvokerFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class SingletonHolder {
+    private static final Logger logger = LoggerFactory.getLogger(SingletonHolder.class);
 
     public static final ClassPool CLASS_POOL = ClassPool.getDefault();
     public static final org.opendaylight.controller.sal.binding.codegen.impl.RuntimeCodeGenerator RPC_GENERATOR_IMPL = new org.opendaylight.controller.sal.binding.codegen.impl.RuntimeCodeGenerator(
@@ -33,7 +36,10 @@ public class SingletonHolder {
 
     public static final int CORE_NOTIFICATION_THREADS = 4;
     public static final int MAX_NOTIFICATION_THREADS = 32;
+    // block caller thread after MAX_NOTIFICATION_THREADS + MAX_NOTIFICATION_QUEUE_SIZE pending notifications
+    public static final int MAX_NOTIFICATION_QUEUE_SIZE = 1000;
     public static final int NOTIFICATION_THREAD_LIFE = 15;
+    private static final String NOTIFICATION_QUEUE_SIZE_PROPERTY = "mdsal.notificationqueue.size";
 
     private static ListeningExecutorService NOTIFICATION_EXECUTOR = null;
     private static ListeningExecutorService COMMIT_EXECUTOR = null;
@@ -44,22 +50,29 @@ public class SingletonHolder {
      *             should use service injection to make the executor configurable.
      */
     @Deprecated
-    public static synchronized final ListeningExecutorService getDefaultNotificationExecutor() {
+    public static synchronized ListeningExecutorService getDefaultNotificationExecutor() {
 
         if (NOTIFICATION_EXECUTOR == null) {
-            // Overriding the queue since we need an unbounded queue
-            // and threadpoolexecutor would not create new threads if the queue is not full
-            BlockingQueue<Runnable> queue = new LinkedBlockingQueue<Runnable>() {
+            int queueSize = MAX_NOTIFICATION_QUEUE_SIZE;
+            String queueValue = System.getProperty(NOTIFICATION_QUEUE_SIZE_PROPERTY);
+            if (StringUtils.isNotBlank(queueValue)) {
+                try {
+                    queueSize = Integer.parseInt(queueValue);
+                    logger.trace("Queue size was set to {}", queueSize);
+                }catch(NumberFormatException e) {
+                    logger.warn("Cannot parse {} as set by {}, using default {}", queueValue,
+                            NOTIFICATION_QUEUE_SIZE_PROPERTY, queueSize);
+                }
+            }
+            // Overriding the queue:
+            // ThreadPoolExecutor would not create new threads if the queue is not full, thus adding
+            // occurs in RejectedExecutionHandler.
+            // This impl saturates threadpool first, then queue. When both are full caller will get blocked.
+            BlockingQueue<Runnable> queue = new LinkedBlockingQueue<Runnable>(queueSize) {
                 @Override
                 public boolean offer(Runnable r) {
-                    if (size() <= 1) {
-                        // if the queue is empty (or has just 1), no need to rampup the threads
-                        return super.offer(r);
-                    } else {
-                        // if the queue is not empty, force the queue to return false.
-                        // threadpoolexecutor will spawn a new thread if the queue.offer returns false.
-                        return false;
-                    }
+                    // ThreadPoolExecutor will spawn a new thread after core size is reached only if the queue.offer returns false.
+                    return false;
                 }
             };
 
@@ -74,7 +87,8 @@ public class SingletonHolder {
                             try {
                                 executor.getQueue().put(r);
                             } catch (InterruptedException e) {
-                                e.printStackTrace();
+                                Thread.currentThread().interrupt();// set interrupt flag after clearing
+                                throw new IllegalStateException(e);
                             }
                         }
                     });
@@ -90,7 +104,7 @@ public class SingletonHolder {
      *             should use service injection to make the executor configurable.
      */
     @Deprecated
-    public static synchronized final ListeningExecutorService getDefaultCommitExecutor() {
+    public static synchronized ListeningExecutorService getDefaultCommitExecutor() {
         if (COMMIT_EXECUTOR == null) {
             ThreadFactory factory = new ThreadFactoryBuilder().setDaemon(true).setNameFormat("md-sal-binding-commit-%d").build();
             /*