+++ /dev/null
-/*
- * 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,
- * and is available at http://www.eclipse.org/legal/epl-v10.html
- */
-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;
-import org.opendaylight.controller.config.api.jmx.CommitStatus;
-import org.opendaylight.controller.config.manager.impl.ConfigRegistryImpl;
-import org.opendaylight.controller.config.spi.ModuleFactory;
-import org.osgi.framework.ServiceReference;
-import org.osgi.util.tracker.ServiceTrackerCustomizer;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * 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);
-
- public static final int DEFAULT_MAX_ATTEMPTS = 10;
-
- private final BlankTransaction blankTransaction;
- private final ExecutorService txExecutor;
- private final int maxAttempts;
-
- public BlankTransactionServiceTracker(final ConfigRegistryImpl configRegistry) {
- this(() -> {
- ObjectName tx = configRegistry.beginConfig(true);
- return configRegistry.commitConfig(tx);
- });
- }
-
- public BlankTransactionServiceTracker(final BlankTransaction blankTransaction) {
- this(blankTransaction, DEFAULT_MAX_ATTEMPTS, Executors
- .newSingleThreadExecutor(new ThreadFactoryBuilder().setNameFormat("config-blank-txn-%d").build()));
- }
-
- @VisibleForTesting
- BlankTransactionServiceTracker(final BlankTransaction blankTx, final int maxAttempts,
- final ExecutorService txExecutor) {
- this.blankTransaction = blankTx;
- this.maxAttempts = maxAttempts;
- this.txExecutor = txExecutor;
- }
-
- @Override
- public Object addingService(final ServiceReference<ModuleFactory> moduleFactoryServiceReference) {
- blankTransactionAsync();
- return null;
- }
-
- 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 {
- // create transaction
- CommitStatus commitStatus = blankTransaction.hit();
- LOG.debug("Committed blank transaction with status {}", commitStatus);
- return;
- } catch (final ConflictingVersionException e) {
- lastException = e;
- try {
- Thread.sleep(1000);
- } catch (final InterruptedException interruptedException) {
- Thread.currentThread().interrupt();
- LOG.debug("blankTransactionSync was interrupted");
- return;
- }
- } catch (final ValidationException e) {
- LOG.error("Validation exception while running blank transaction indicates programming error", e);
- }
- }
-
- LOG.error("Maximal number of attempts reached and still cannot get optimistic lock from config manager",
- lastException);
- }
-
- @Override
- public void modifiedService(final ServiceReference<ModuleFactory> moduleFactoryServiceReference,
- final Object object) {
- blankTransactionAsync();
- }
-
- @Override
- public void removedService(final ServiceReference<ModuleFactory> moduleFactoryServiceReference,
- final Object object) {
- blankTransactionAsync();
- }
-
- @VisibleForTesting
- interface BlankTransaction {
- CommitStatus hit() throws ValidationException, ConflictingVersionException;
- }
-}