org.opendaylight.netconf.topology.singleton.impl.tx.NetconfReadOnlyTransaction.java Source code

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Here is the source code for org.opendaylight.netconf.topology.singleton.impl.tx.NetconfReadOnlyTransaction.java

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/*
 * Copyright (c) 2016 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.netconf.topology.singleton.impl.tx;

import akka.actor.ActorSystem;
import akka.dispatch.OnComplete;
import com.google.common.base.Function;
import com.google.common.base.Optional;
import com.google.common.util.concurrent.CheckedFuture;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.SettableFuture;
import javax.annotation.Nullable;
import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
import org.opendaylight.controller.md.sal.dom.api.DOMDataReadOnlyTransaction;
import org.opendaylight.netconf.sal.connect.util.RemoteDeviceId;
import org.opendaylight.netconf.topology.singleton.api.NetconfDOMTransaction;
import org.opendaylight.netconf.topology.singleton.messages.NormalizedNodeMessage;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import scala.concurrent.Future;

public class NetconfReadOnlyTransaction implements DOMDataReadOnlyTransaction {

    private static final Logger LOG = LoggerFactory.getLogger(NetconfReadOnlyTransaction.class);

    private final RemoteDeviceId id;
    private final NetconfDOMTransaction delegate;
    private final ActorSystem actorSystem;

    public NetconfReadOnlyTransaction(final RemoteDeviceId id, final ActorSystem actorSystem,
            final NetconfDOMTransaction delegate) {
        this.id = id;
        this.delegate = delegate;
        this.actorSystem = actorSystem;
    }

    @Override
    public void close() {
        //NOOP
    }

    @Override
    public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read(final LogicalDatastoreType store,
            final YangInstanceIdentifier path) {

        LOG.trace("{}: Read {} via NETCONF: {}", id, store, path);

        final Future<Optional<NormalizedNodeMessage>> future = delegate.read(store, path);
        final SettableFuture<Optional<NormalizedNode<?, ?>>> settableFuture = SettableFuture.create();
        final CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> checkedFuture;
        checkedFuture = Futures.makeChecked(settableFuture, new Function<Exception, ReadFailedException>() {
            @Nullable
            @Override
            public ReadFailedException apply(Exception cause) {
                return new ReadFailedException("Read from transaction failed", cause);
            }
        });
        future.onComplete(new OnComplete<Optional<NormalizedNodeMessage>>() {
            @Override
            public void onComplete(final Throwable throwable,
                    final Optional<NormalizedNodeMessage> normalizedNodeMessage) throws Throwable {
                if (throwable == null) {
                    if (normalizedNodeMessage.isPresent()) {
                        settableFuture.set(normalizedNodeMessage
                                .transform(new Function<NormalizedNodeMessage, NormalizedNode<?, ?>>() {

                                    @Nullable
                                    @Override
                                    public NormalizedNode<?, ?> apply(final NormalizedNodeMessage input) {
                                        return input.getNode();
                                    }
                                }));
                    } else {
                        settableFuture.set(Optional.absent());
                    }
                } else {
                    settableFuture.setException(throwable);
                }
            }
        }, actorSystem.dispatcher());
        return checkedFuture;
    }

    @Override
    public CheckedFuture<Boolean, ReadFailedException> exists(final LogicalDatastoreType store,
            final YangInstanceIdentifier path) {

        LOG.trace("{}: Exists {} via NETCONF: {}", id, store, path);

        final Future<Boolean> existsFuture = delegate.exists(store, path);
        final SettableFuture<Boolean> settableFuture = SettableFuture.create();
        final CheckedFuture<Boolean, ReadFailedException> checkedFuture;
        checkedFuture = Futures.makeChecked(settableFuture, new Function<Exception, ReadFailedException>() {
            @Nullable
            @Override
            public ReadFailedException apply(Exception cause) {
                return new ReadFailedException("Read from transaction failed", cause);
            }
        });
        existsFuture.onComplete(new OnComplete<Boolean>() {
            @Override
            public void onComplete(final Throwable throwable, final Boolean result) throws Throwable {
                if (throwable == null) {
                    settableFuture.set(result);
                } else {
                    settableFuture.setException(throwable);
                }
            }
        }, actorSystem.dispatcher());
        return checkedFuture;
    }

    @Override
    public Object getIdentifier() {
        return this;
    }
}