2 * Copyright © 2017 Orange, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
9 package org.opendaylight.transportpce.common.device;
11 import com.google.common.util.concurrent.FluentFuture;
12 import com.google.common.util.concurrent.FutureCallback;
13 import com.google.common.util.concurrent.ListenableFuture;
14 import java.util.Optional;
15 import java.util.concurrent.CountDownLatch;
16 import java.util.concurrent.Executors;
17 import java.util.concurrent.ScheduledExecutorService;
18 import java.util.concurrent.TimeUnit;
19 import java.util.concurrent.atomic.AtomicBoolean;
20 import org.eclipse.jdt.annotation.NonNull;
21 import org.opendaylight.mdsal.binding.api.ReadWriteTransaction;
22 import org.opendaylight.mdsal.common.api.CommitInfo;
23 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
24 import org.opendaylight.yangtools.util.concurrent.FluentFutures;
25 import org.opendaylight.yangtools.yang.binding.DataObject;
26 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
27 import org.slf4j.Logger;
28 import org.slf4j.LoggerFactory;
31 * Represents read-write transaction on netconf device.
32 * This transaction can be obtained by {@link DeviceTransactionManager}.
35 * WARNING: Only one transaction can be opened at the same time on device!
36 * It's important to close (cancel/submit) transaction when work is done with it
37 * (so others can access the device).
40 public class DeviceTransaction {
42 private static final Logger LOG = LoggerFactory.getLogger(DeviceTransaction.class);
44 private final ReadWriteTransaction rwTx;
45 private final CountDownLatch deviceLock;
46 private final ScheduledExecutorService scheduledExecutorService;
47 private final AtomicBoolean wasSubmittedOrCancelled = new AtomicBoolean(false);
49 DeviceTransaction(ReadWriteTransaction rwTx, CountDownLatch deviceLock) {
51 this.deviceLock = deviceLock;
52 this.scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
53 LOG.debug("Device transaction created. Lock: {}", deviceLock);
56 public <T extends DataObject> ListenableFuture<Optional<T>> read(LogicalDatastoreType store,
57 InstanceIdentifier<T> path) {
58 return rwTx.read(store, path);
61 public <T extends DataObject> void put(LogicalDatastoreType store, InstanceIdentifier<T> path, T data) {
62 rwTx.put(store, path, data);
65 public <T extends DataObject> void merge(LogicalDatastoreType store, InstanceIdentifier<T> path, T data) {
66 rwTx.merge(store, path, data);
70 public void delete(LogicalDatastoreType store, InstanceIdentifier<?> path) {
71 rwTx.delete(store, path);
75 * Cancels transaction and unlocks it.
76 * @return true if cancel was successful.
78 public boolean cancel() {
79 if (wasSubmittedOrCancelled.get()) {
80 LOG.warn("Transaction was already submitted or canceled!");
84 LOG.debug("Transaction cancelled. Lock: {}", deviceLock);
85 wasSubmittedOrCancelled.set(true);
91 * Submits data changed in transaction to device with defined timeout to commit. If time from timeout runs out then
92 * the commit will be interrupted and the device will be unlocked.
94 * @param timeout a timeout
95 * @param timeUnit a time unit
96 * @return FluentFuture which indicates when the commit is completed.
98 public FluentFuture<? extends @NonNull CommitInfo> commit(long timeout, TimeUnit timeUnit) {
99 if (wasSubmittedOrCancelled.get()) {
100 String msg = "Transaction was already submitted or canceled!";
102 return FluentFutures.immediateFailedFluentFuture(new IllegalStateException(msg));
105 LOG.debug("Transaction committed. Lock: {}", deviceLock);
106 wasSubmittedOrCancelled.set(true);
107 FluentFuture<? extends @NonNull CommitInfo> future =
108 rwTx.commit().withTimeout(timeout, timeUnit, scheduledExecutorService);
110 future.addCallback(new FutureCallback<CommitInfo>() {
112 public void onSuccess(CommitInfo result) {
113 LOG.debug("Transaction with lock {} successfully committed: {}", deviceLock, result);
118 public void onFailure(Throwable throwable) {
119 LOG.error("Device transaction commit failed or submit took longer than {} {}! Unlocking device.",
120 timeout, timeUnit, throwable);
123 }, scheduledExecutorService);
128 * Returns state of transaction.
129 * @return true if transaction was closed; otherwise false
131 public AtomicBoolean wasSubmittedOrCancelled() {
132 return wasSubmittedOrCancelled;
135 private void afterClose() {
136 scheduledExecutorService.shutdown();
137 deviceLock.countDown();