From: Tony Tkacik <ttkacik@cisco.com>
Date: Wed, 7 May 2014 15:42:46 +0000 (+0000)
Subject: Merge "Increase mdsal's notification queue size, make it configurable."
X-Git-Tag: autorelease-tag-v20140601202136_82eb3f9~125
X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?p=controller.git;a=commitdiff_plain;h=3425d61ef729f17632b7c764bc93ce2df1d9345a;hp=d3cb37167e6327b4f280e44bdf92ea95fb240fb8

Merge "Increase mdsal's notification queue size, make it configurable."
---

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 4141bba2d4..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(
@@ -34,8 +37,9 @@ 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 = 10;
+    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;
@@ -46,14 +50,25 @@ 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) {
+            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>(MAX_NOTIFICATION_QUEUE_SIZE) {
+            BlockingQueue<Runnable> queue = new LinkedBlockingQueue<Runnable>(queueSize) {
                 @Override
                 public boolean offer(Runnable r) {
                     // ThreadPoolExecutor will spawn a new thread after core size is reached only if the queue.offer returns false.
@@ -89,7 +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();
             /*