-/*
- * Copyright (c) 2014 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,
- * and is available at http://www.eclipse.org/legal/epl-v10.html
- */
-package org.opendaylight.controller.sal.binding.codegen.impl;
-
-import com.google.common.util.concurrent.ForwardingBlockingQueue;
-import com.google.common.util.concurrent.ListeningExecutorService;
-import com.google.common.util.concurrent.MoreExecutors;
-import com.google.common.util.concurrent.ThreadFactoryBuilder;
-import java.util.concurrent.BlockingQueue;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-import java.util.concurrent.LinkedBlockingQueue;
-import java.util.concurrent.RejectedExecutionException;
-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.mdsal.binding.generator.util.JavassistUtils;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-public final class SingletonHolder {
- private static final Logger LOG = LoggerFactory.getLogger(SingletonHolder.class);
-
- public static final ClassPool CLASS_POOL = ClassPool.getDefault();
- public static final JavassistUtils JAVASSIST = JavassistUtils.forClassPool(CLASS_POOL);
-
- 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;
- private static ListeningExecutorService CHANGE_EVENT_EXECUTOR = null;
-
- private SingletonHolder() {
- }
-
- /**
- * Deprecated.
- *
- * @deprecated This method is only used from configuration modules and thus callers of it
- * should use service injection to make the executor configurable.
- */
- @Deprecated
- public static synchronized ListeningExecutorService getDefaultNotificationExecutor() {
-
- if (NOTIFICATION_EXECUTOR == null) {
- int queueSize = MAX_NOTIFICATION_QUEUE_SIZE;
- final String queueValue = System.getProperty(NOTIFICATION_QUEUE_SIZE_PROPERTY);
- if (StringUtils.isNotBlank(queueValue)) {
- try {
- queueSize = Integer.parseInt(queueValue);
- LOG.trace("Queue size was set to {}", queueSize);
- } catch (final NumberFormatException e) {
- LOG.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.
- final BlockingQueue<Runnable> delegate = new LinkedBlockingQueue<>(queueSize);
- final BlockingQueue<Runnable> queue = new ForwardingBlockingQueue<Runnable>() {
- @Override
- protected BlockingQueue<Runnable> delegate() {
- return delegate;
- }
-
- @Override
- public boolean offer(final Runnable runnrunnableable) {
- // ThreadPoolExecutor will spawn a new thread after core size is reached only
- // if the queue.offer returns false.
- return false;
- }
- };
-
- final ThreadFactory factory = new ThreadFactoryBuilder().setDaemon(true)
- .setNameFormat("md-sal-binding-notification-%d").build();
-
- final ThreadPoolExecutor executor = new ThreadPoolExecutor(CORE_NOTIFICATION_THREADS,
- MAX_NOTIFICATION_THREADS, NOTIFICATION_THREAD_LIFE, TimeUnit.SECONDS, queue, factory,
- // if the max threads are met, then it will raise a rejectedExecution. We then push to the queue.
- (runnable, executor1) -> {
- try {
- executor1.getQueue().put(runnable);
- } catch (final InterruptedException e) {
- throw new RejectedExecutionException("Interrupted while waiting on the queue", e);
- }
- });
-
- NOTIFICATION_EXECUTOR = MoreExecutors.listeningDecorator(executor);
- }
-
- return NOTIFICATION_EXECUTOR;
- }
-
- /**
- * Deprecated.
- *
- * @deprecated This method is only used from configuration modules and thus callers of it
- * should use service injection to make the executor configurable.
- */
- @Deprecated
- public static synchronized ListeningExecutorService getDefaultCommitExecutor() {
- if (COMMIT_EXECUTOR == null) {
- final ThreadFactory factory = new ThreadFactoryBuilder().setDaemon(true)
- .setNameFormat("md-sal-binding-commit-%d").build();
- /*
- * FIXME: this used to be newCacheThreadPool(), but MD-SAL does not have transaction
- * ordering guarantees, which means that using a concurrent threadpool results
- * in application data being committed in random order, potentially resulting
- * in inconsistent data being present. Once proper primitives are introduced,
- * concurrency can be reintroduced.
- */
- final ExecutorService executor = Executors.newSingleThreadExecutor(factory);
- COMMIT_EXECUTOR = MoreExecutors.listeningDecorator(executor);
- }
-
- return COMMIT_EXECUTOR;
- }
-
- public static synchronized ExecutorService getDefaultChangeEventExecutor() {
- if (CHANGE_EVENT_EXECUTOR == null) {
- final ThreadFactory factory = new ThreadFactoryBuilder().setDaemon(true)
- .setNameFormat("md-sal-binding-change-%d").build();
- /*
- * FIXME: this used to be newCacheThreadPool(), but MD-SAL does not have transaction
- * ordering guarantees, which means that using a concurrent threadpool results
- * in application data being committed in random order, potentially resulting
- * in inconsistent data being present. Once proper primitives are introduced,
- * concurrency can be reintroduced.
- */
- final ExecutorService executor = Executors.newSingleThreadExecutor(factory);
- CHANGE_EVENT_EXECUTOR = MoreExecutors.listeningDecorator(executor);
- }
-
- return CHANGE_EVENT_EXECUTOR;
- }
-}
Code Review / controller.git / commitdiff