org.opendaylight.protocol.bgp.openconfig.impl.moduleconfig.DataBrokerFunction.java Source code

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Here is the source code for org.opendaylight.protocol.bgp.openconfig.impl.moduleconfig.DataBrokerFunction.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.protocol.bgp.openconfig.impl.moduleconfig;

import com.google.common.base.Function;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
import org.opendaylight.protocol.bgp.openconfig.impl.util.OpenConfigUtil;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.rev130405.ServiceRef;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.rev130405.modules.Module;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.rev130405.services.Service;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.rev130405.services.ServiceKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.rev130405.services.service.Instance;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.md.sal.dom.rev131028.DomAsyncDataBroker;
import org.opendaylight.yangtools.yang.binding.ChildOf;

final public class DataBrokerFunction {
    private DataBrokerFunction() {
        throw new UnsupportedOperationException();
    }

    public static <T extends ServiceRef & ChildOf<Module>> T getRibInstance(
            final BGPConfigModuleProvider configModuleOp, final Function<String, T> function,
            final String instanceName, final ReadOnlyTransaction rTx) {
        Preconditions.checkNotNull(rTx);
        try {
            final Optional<Service> maybeService = configModuleOp
                    .readConfigService(new ServiceKey(DomAsyncDataBroker.class), rTx);
            if (maybeService.isPresent()) {
                final Optional<Instance> maybeInstance = Iterables.tryFind(maybeService.get().getInstance(),
                        new Predicate<Instance>() {
                            @Override
                            public boolean apply(final Instance instance) {
                                final String moduleName = OpenConfigUtil.getModuleName(instance.getProvider());
                                if (moduleName.equals(instanceName)) {
                                    return true;
                                }
                                return false;
                            }
                        });
                if (maybeInstance.isPresent()) {
                    return function.apply(maybeInstance.get().getName());
                }
            }
            return null;
        } catch (ReadFailedException e) {
            throw new IllegalStateException("Failed to read service.", e);
        }
    }
}