+/*
+ * Copyright (c) 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.clustering.it.provider.impl;
+
+import com.google.common.util.concurrent.CheckedFuture;
+import com.google.common.util.concurrent.FutureCallback;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.SettableFuture;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.SplittableRandom;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Nullable;
+import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
+import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
+import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
+import org.opendaylight.controller.md.sal.dom.api.DOMDataBroker;
+import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
+import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
+import org.opendaylight.yang.gen.v1.tag.opendaylight.org._2017.controller.yang.lowlevel.control.rev170215.WriteTransactionsInput;
+import org.opendaylight.yang.gen.v1.tag.opendaylight.org._2017.controller.yang.lowlevel.control.rev170215.WriteTransactionsOutput;
+import org.opendaylight.yang.gen.v1.tag.opendaylight.org._2017.controller.yang.lowlevel.control.rev170215.WriteTransactionsOutputBuilder;
+import org.opendaylight.yangtools.yang.common.QName;
+import org.opendaylight.yangtools.yang.common.RpcError;
+import org.opendaylight.yangtools.yang.common.RpcResult;
+import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
+import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
+import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
+import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.CollectionNodeBuilder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class WriteTransactionsHandler implements Runnable {
+
+ private static final Logger LOG = LoggerFactory.getLogger(WriteTransactionsHandler.class);
+ private static final int SECOND_AS_NANO = 1000000000;
+ //2^20 as in the model
+ private static final int MAX_ITEM = 1048576;
+
+ private static final QName ID_INTS =
+ QName.create("tag:opendaylight.org,2017:controller:yang:lowlevel:target", "2017-02-15", "id-ints");
+ private static final QName ID =
+ QName.create("tag:opendaylight.org,2017:controller:yang:lowlevel:target", "2017-02-15", "id");
+ private static final QName ITEM =
+ QName.create("tag:opendaylight.org,2017:controller:yang:lowlevel:target", "2017-02-15", "item");
+ private static final QName NUMBER =
+ QName.create("tag:opendaylight.org,2017:controller:yang:lowlevel:target", "2017-02-15", "number");
+
+ public static final YangInstanceIdentifier ID_INTS_YID = YangInstanceIdentifier.of(ID_INTS);
+
+ private final DOMDataBroker domDataBroker;
+ private final Long timeToTake;
+ private final Long delay;
+ private final String id;
+ private final WriteTransactionsInput input;
+
+ private final ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor();
+ private final ArrayList<CheckedFuture<Void, TransactionCommitFailedException>> futures = new ArrayList<>();
+ private final Set<Integer> usedValues = new HashSet<>();
+
+ private RandomnessProvider random;
+ private TxProvider txProvider;
+
+ private long startTime;
+ private SettableFuture<RpcResult<WriteTransactionsOutput>> completionFuture;
+
+ private long allTx = 0;
+ private long insertTx = 0;
+ private long deleteTx = 0;
+ private ScheduledFuture<?> scheduledFuture;
+ private YangInstanceIdentifier idListWithKey;
+
+ public WriteTransactionsHandler(final DOMDataBroker domDataBroker, final WriteTransactionsInput input) {
+ this.domDataBroker = domDataBroker;
+ this.input = input;
+
+ timeToTake = input.getSeconds() * SECOND_AS_NANO;
+ delay = SECOND_AS_NANO / input.getTransactionsPerSecond();
+ id = input.getId();
+ }
+
+ @Override
+ public void run() {
+ final long current = System.nanoTime();
+
+ futures.add(execWrite());
+
+ maybeFinish(current);
+ }
+
+ public void start(final SettableFuture<RpcResult<WriteTransactionsOutput>> settableFuture) {
+ LOG.debug("Starting write-transactions.");
+
+ if (input.isChainedTransactions()) {
+ txProvider = new TxChainBackedProvider(domDataBroker, settableFuture, executor);
+ random = new BasicProvider();
+ } else {
+ txProvider = new DataBrokerBackedProvider(domDataBroker);
+ random = new NonConflictingProvider();
+ }
+
+ if (ensureListExists(settableFuture) && fillInitialList(settableFuture)) {
+ startTime = System.nanoTime();
+ completionFuture = settableFuture;
+ scheduledFuture = executor.scheduleAtFixedRate(this, 0, delay, TimeUnit.NANOSECONDS);
+ } else {
+ executor.shutdown();
+ }
+ }
+
+ private boolean ensureListExists(final SettableFuture<RpcResult<WriteTransactionsOutput>> settableFuture) {
+
+ final MapEntryNode entry = ImmutableNodes.mapEntryBuilder(ID_INTS, ID, id)
+ .withChild(ImmutableNodes.mapNodeBuilder(ITEM).build())
+ .build();
+ final MapNode mapNode =
+ ImmutableNodes.mapNodeBuilder(ID_INTS)
+ .withChild(entry)
+ .build();
+
+ final DOMDataWriteTransaction tx = txProvider.createTransaction();
+ idListWithKey = ID_INTS_YID.node(entry.getIdentifier());
+ tx.merge(LogicalDatastoreType.CONFIGURATION, ID_INTS_YID, mapNode);
+
+ try {
+ tx.submit().checkedGet();
+ } catch (final TransactionCommitFailedException e) {
+ LOG.warn("Unable to ensure IdInts list for id: {} exists.", id, e);
+ settableFuture.set(RpcResultBuilder.<WriteTransactionsOutput>failed()
+ .withError(RpcError.ErrorType.APPLICATION, "Unexpected-exception", e).build());
+ return false;
+ }
+
+ return true;
+ }
+
+ private boolean fillInitialList(final SettableFuture<RpcResult<WriteTransactionsOutput>> settableFuture) {
+ LOG.debug("Filling the item list with initial values.");
+
+ final CollectionNodeBuilder<MapEntryNode, MapNode> mapBuilder = ImmutableNodes.mapNodeBuilder(ITEM);
+ for (int i = 0; i < MAX_ITEM / 2; i++) {
+ usedValues.add(i);
+ mapBuilder.withChild(ImmutableNodes.mapEntry(ITEM, NUMBER, i));
+ }
+
+ final YangInstanceIdentifier itemListId = idListWithKey.node(ITEM);
+ final DOMDataWriteTransaction tx = txProvider.createTransaction();
+ tx.put(LogicalDatastoreType.CONFIGURATION, itemListId, mapBuilder.build());
+
+ try {
+ tx.submit().checkedGet();
+ } catch (final TransactionCommitFailedException e) {
+ LOG.warn("Unable to fill the initial item list.", e);
+ settableFuture.set(RpcResultBuilder.<WriteTransactionsOutput>failed()
+ .withError(RpcError.ErrorType.APPLICATION, "Unexpected-exception", e).build());
+ return false;
+ }
+
+ return true;
+ }
+
+ private CheckedFuture<Void, TransactionCommitFailedException> execWrite() {
+ final int i = random.nextInt(MAX_ITEM + 1);
+
+ final YangInstanceIdentifier entryId =
+ idListWithKey.node(ITEM).node(new YangInstanceIdentifier.NodeIdentifierWithPredicates(ITEM, NUMBER, i));
+
+ final DOMDataWriteTransaction tx = txProvider.createTransaction();
+ allTx++;
+
+ if (usedValues.contains(i)) {
+ LOG.debug("Deleting item: {}", i);
+ deleteTx++;
+ tx.delete(LogicalDatastoreType.CONFIGURATION, entryId);
+ usedValues.remove(i);
+
+ } else {
+ LOG.debug("Inserting item: {}", i);
+ insertTx++;
+ final MapEntryNode entry = ImmutableNodes.mapEntry(ITEM, NUMBER, i);
+ tx.put(LogicalDatastoreType.CONFIGURATION, entryId, entry);
+ usedValues.add(i);
+ }
+
+ return tx.submit();
+ }
+
+ private void maybeFinish(final long current) {
+ if ((current - startTime) > timeToTake) {
+ LOG.debug("Reached max running time, waiting for futures to complete.");
+ scheduledFuture.cancel(false);
+
+ final ListenableFuture<List<Void>> allFutures = Futures.allAsList(futures);
+
+ Futures.addCallback(allFutures, new FutureCallback<List<Void>>() {
+ @Override
+ public void onSuccess(@Nullable final List<Void> result) {
+ LOG.debug("All futures completed successfully.");
+
+ final WriteTransactionsOutput output = new WriteTransactionsOutputBuilder()
+ .setAllTx(allTx)
+ .setInsertTx(insertTx)
+ .setDeleteTx(deleteTx)
+ .build();
+
+ completionFuture.set(RpcResultBuilder.<WriteTransactionsOutput>success()
+ .withResult(output).build());
+
+ executor.shutdown();
+ }
+
+ @Override
+ public void onFailure(final Throwable t) {
+ LOG.error("Write transactions failed.", t);
+ completionFuture.set(RpcResultBuilder.<WriteTransactionsOutput>failed()
+ .withError(RpcError.ErrorType.APPLICATION, "Unexpected-exception", t).build());
+
+ executor.shutdown();
+ }
+ });
+ }
+ }
+
+ private interface RandomnessProvider {
+ int nextInt(int bound);
+ }
+
+ private static class NonConflictingProvider implements RandomnessProvider {
+
+ private final SplittableRandom random = new SplittableRandom();
+ private final LinkedHashSet<Integer> previousNumbers = new LinkedHashSet<>();
+
+ @Override
+ public int nextInt(int bound) {
+ int nextInt;
+ do {
+ nextInt = random.nextInt(bound);
+ } while (previousNumbers.contains(nextInt));
+
+ if (previousNumbers.size() > 100000) {
+ previousNumbers.iterator().remove();
+ }
+ previousNumbers.add(nextInt);
+
+ return nextInt;
+ }
+ }
+
+ private static class BasicProvider implements RandomnessProvider {
+
+ private final SplittableRandom random = new SplittableRandom();
+
+ @Override
+ public int nextInt(int bound) {
+ return random.nextInt(bound);
+ }
+ }
+
+ private interface TxProvider {
+
+ DOMDataWriteTransaction createTransaction();
+ }
+
+ private static class TxChainBackedProvider implements TxProvider {
+
+ private final DOMTransactionChain transactionChain;
+
+ TxChainBackedProvider(final DOMDataBroker dataBroker,
+ final SettableFuture<RpcResult<WriteTransactionsOutput>> completionFuture,
+ final ScheduledExecutorService executor) {
+
+ transactionChain =
+ dataBroker.createTransactionChain(new TestChainListener(completionFuture, executor));
+ }
+
+ @Override
+ public DOMDataWriteTransaction createTransaction() {
+ return transactionChain.newWriteOnlyTransaction();
+ }
+ }
+
+ private static class DataBrokerBackedProvider implements TxProvider {
+
+ private final DOMDataBroker dataBroker;
+
+ DataBrokerBackedProvider(final DOMDataBroker dataBroker) {
+ this.dataBroker = dataBroker;
+ }
+
+ @Override
+ public DOMDataWriteTransaction createTransaction() {
+ return dataBroker.newWriteOnlyTransaction();
+ }
+ }
+
+ private static class TestChainListener implements TransactionChainListener {
+
+ private final SettableFuture<RpcResult<WriteTransactionsOutput>> resultFuture;
+ private final ScheduledExecutorService executor;
+
+ TestChainListener(final SettableFuture<RpcResult<WriteTransactionsOutput>> resultFuture,
+ final ScheduledExecutorService executor) {
+
+ this.resultFuture = resultFuture;
+ this.executor = executor;
+ }
+
+ @Override
+ public void onTransactionChainFailed(final TransactionChain<?, ?> chain,
+ final AsyncTransaction<?, ?> transaction,
+ final Throwable cause) {
+ LOG.warn("Transaction chain failed.", cause);
+ resultFuture.set(RpcResultBuilder.<WriteTransactionsOutput>failed()
+ .withError(RpcError.ErrorType.APPLICATION, "Unexpected-exception", cause).build());
+
+ executor.shutdown();
+ }
+
+ @Override
+ public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
+ LOG.debug("Transaction chain closed successfully.");
+ }
+ }
+}