org.opendaylight.restconf.server.mdsal.MdsalRestconfStreamRegistry Maven / Gradle / Ivy

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RESTCONF server implemented on top of MD-SAL
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/*
 * Copyright © 2019 FRINX s.r.o. 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.restconf.server.mdsal;

import static java.util.Objects.requireNonNull;

import com.google.common.util.concurrent.ListenableFuture;
import javax.inject.Inject;
import javax.inject.Singleton;
import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
import org.opendaylight.mdsal.dom.api.DOMDataBroker;
import org.opendaylight.restconf.server.spi.AbstractRestconfStreamRegistry;
import org.opendaylight.restconf.server.spi.RestconfStream;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.restconf.monitoring.rev170126.RestconfState;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.restconf.monitoring.rev170126.restconf.state.Streams;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.restconf.monitoring.rev170126.restconf.state.streams.Stream;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;

/**
 * This singleton class is responsible for creation, removal and searching for {@link RestconfStream}s.
 */
@Singleton
@Component(service = RestconfStream.Registry.class)
public final class MdsalRestconfStreamRegistry extends AbstractRestconfStreamRegistry {
    private static final YangInstanceIdentifier RESTCONF_STATE_STREAMS = YangInstanceIdentifier.of(
        NodeIdentifier.create(RestconfState.QNAME),
        NodeIdentifier.create(Streams.QNAME),
        NodeIdentifier.create(Stream.QNAME));

    private final DOMDataBroker dataBroker;

    @Inject
    @Activate
    public MdsalRestconfStreamRegistry(@Reference final RestconfStream.LocationProvider locationProvider,
            @Reference final DOMDataBroker dataBroker) {
        super(locationProvider);
        this.dataBroker = requireNonNull(dataBroker);
    }

    @Override
    protected ListenableFuture putStream(final MapEntryNode stream) {
        // Now issue a put operation
        final var tx = dataBroker.newWriteOnlyTransaction();
        tx.put(LogicalDatastoreType.OPERATIONAL, RESTCONF_STATE_STREAMS.node(stream.name()), stream);
        return tx.commit();
    }

    @Override
    protected ListenableFuture deleteStream(final NodeIdentifierWithPredicates streamName) {
        // Now issue a delete operation while the name is still protected by being associated in the map.
        final var tx = dataBroker.newWriteOnlyTransaction();
        tx.delete(LogicalDatastoreType.OPERATIONAL, RESTCONF_STATE_STREAMS.node(streamName));
        return tx.commit();
    }
}