+++ /dev/null
-/**
- * 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.md.inventory.manager;
-
-import java.util.ArrayList;
-import java.util.concurrent.BlockingQueue;
-import java.util.concurrent.LinkedBlockingDeque;
-
-import org.opendaylight.controller.md.sal.binding.api.BindingTransactionChain;
-import org.opendaylight.controller.md.sal.binding.api.DataBroker;
-import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
-import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
-import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
-import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
-import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
-import org.opendaylight.yangtools.concepts.ListenerRegistration;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import com.google.common.base.Preconditions;
-
-class FlowCapableInventoryProvider implements AutoCloseable, Runnable, TransactionChainListener {
- private static final Logger LOG = LoggerFactory.getLogger(FlowCapableInventoryProvider.class);
- private static final int QUEUE_DEPTH = 500;
- private static final int MAX_BATCH = 100;
-
- private final BlockingQueue<InventoryOperation> queue = new LinkedBlockingDeque<>(QUEUE_DEPTH);
- private final NotificationProviderService notificationService;
-
- private final DataBroker dataBroker;
- private BindingTransactionChain txChain;
- private ListenerRegistration<?> listenerRegistration;
- private Thread thread;
-
- FlowCapableInventoryProvider(final DataBroker dataBroker, final NotificationProviderService notificationService) {
- this.dataBroker = Preconditions.checkNotNull(dataBroker);
- this.notificationService = Preconditions.checkNotNull(notificationService);
- }
-
- void start() {
- final NodeChangeCommiter changeCommiter = new NodeChangeCommiter(FlowCapableInventoryProvider.this);
- this.listenerRegistration = this.notificationService.registerNotificationListener(changeCommiter);
-
- this.txChain = (dataBroker.createTransactionChain(this));
- thread = new Thread(this);
- thread.setDaemon(true);
- thread.setName("FlowCapableInventoryProvider");
- thread.start();
-
- LOG.info("Flow Capable Inventory Provider started.");
- }
-
- void enqueue(final InventoryOperation op) {
- try {
- queue.put(op);
- } catch (final InterruptedException e) {
- LOG.warn("Failed to enqueue operation {}", op, e);
- }
- }
-
- @Override
- public void run() {
- try {
- for (; ; ) {
- InventoryOperation op = queue.take();
- int ops = 0;
- final ArrayList<InventoryOperation> opsToApply = new ArrayList<>(MAX_BATCH);
- do {
- opsToApply.add(op);
- ops++;
- if (ops < MAX_BATCH) {
- op = queue.poll();
- } else {
- op = null;
- }
- } while (op != null);
- submitOperations(opsToApply);
- }
- } catch (final InterruptedException e) {
- LOG.info("Processing interrupted, terminating", e);
- }
-
- // Drain all events, making sure any blocked threads are unblocked
- while (!queue.isEmpty()) {
- queue.poll();
- }
- }
-
- /**
- * Starts new empty transaction, custimizes it with submitted operations
- * and submit it to data broker.
- *
- * If transaction chain failed during customization of transaction
- * it allocates new chain and empty transaction and customizes it
- * with submitted operations.
- *
- * This does not retry failed transaction. It only retries it when
- * chain failed during customization of transaction chain.
- *
- * @param opsToApply
- */
- private void submitOperations(final ArrayList<InventoryOperation> opsToApply) {
- final ReadWriteTransaction tx = createCustomizedTransaction(opsToApply);
- LOG.debug("Processed {} operations, submitting transaction {}", opsToApply.size(), tx.getIdentifier());
- try {
- tx.submit();
- } catch (final IllegalStateException e) {
- /*
- * Transaction chain failed during doing batch, so we need to null
- * tx chain and continue processing queue.
- *
- * We fail current txChain which was allocated with createTransaction.
- */
- failCurrentChain(txChain);
- /*
- * We will retry transaction once in order to not loose any data.
- *
- */
- final ReadWriteTransaction retryTx = createCustomizedTransaction(opsToApply);
- retryTx.submit();
- }
- }
-
- /**
- * Creates new empty ReadWriteTransaction. If transaction chain
- * was failed, it will allocate new transaction chain
- * and assign it with this Operation Executor.
- *
- * This call is synchronized to prevent reace with {@link #failCurrentChain(TransactionChain)}.
- *
- * @return New Empty ReadWrite transaction, which continues this chain or starts new transaction
- * chain.
- */
- private synchronized ReadWriteTransaction newEmptyTransaction() {
- try {
- if(txChain == null) {
- // Chain was broken so we need to replace it.
- txChain = dataBroker.createTransactionChain(this);
- }
- return txChain.newReadWriteTransaction();
- } catch (final IllegalStateException e) {
- LOG.debug("Chain is broken, need to allocate new transaction chain.",e);
- /*
- * Chain was broken by previous transaction,
- * but there was race between this.
- * Chain will be closed by #onTransactionChainFailed method.
- */
- txChain = dataBroker.createTransactionChain(this);
- return txChain.newReadWriteTransaction();
- }
- }
-
- /**
- * Creates customized not-submitted transaction, which is ready to be submitted.
- *
- * @param opsToApply Operations which are used to customize transaction.
- * @return Non-empty transaction.
- */
- private ReadWriteTransaction createCustomizedTransaction(final ArrayList<InventoryOperation> opsToApply) {
- final ReadWriteTransaction tx = newEmptyTransaction();
- for(final InventoryOperation op : opsToApply) {
- op.applyOperation(tx);
- }
- return tx;
- }
-
- private synchronized void failCurrentChain(final TransactionChain<?, ?> chain) {
- if(txChain == chain) {
- txChain = null;
- }
- }
-
- @Override
- public void onTransactionChainFailed(final TransactionChain<?, ?> chain, final AsyncTransaction<?, ?> transaction,
- final Throwable cause) {
- LOG.error("Failed to export Flow Capable Inventory, Transaction {} failed.", transaction.getIdentifier(), cause);
- chain.close();
- if(txChain == chain) {
- // Current chain is broken, so we will null it, in order to not use it.
- failCurrentChain(chain);
- }
- }
-
- @Override
- public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
- // NOOP
- }
-
- @Override
- public void close() throws InterruptedException {
- LOG.info("Flow Capable Inventory Provider stopped.");
- if (this.listenerRegistration != null) {
- try {
- this.listenerRegistration.close();
- } catch (final Exception e) {
- LOG.error("Failed to stop inventory provider", e);
- }
- listenerRegistration = null;
- }
-
- if (thread != null) {
- thread.interrupt();
- thread.join();
- thread = null;
- }
- if (txChain != null) {
- try {
- txChain.close();
- } catch (final IllegalStateException e) {
- // It is possible chain failed and was closed by #onTransactionChainFailed
- LOG.debug("Chain was already closed.");
- }
- txChain = null;
- }
- }
-}
Code Review / controller.git / blobdiff