/*
 * 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;

import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.concurrent.Future;
import org.opendaylight.controller.sal.binding.api.BindingAwareBroker;
import org.opendaylight.controller.sal.binding.api.RpcProviderRegistry;
import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonService;
import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceProvider;
import org.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
import org.opendaylight.yang.gen.v1.urn.opendaylight.controller.basic.rpc.test.rev160120.BasicRpcTestService;
import org.opendaylight.yangtools.yang.common.RpcResult;
import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class BasicRpcTestProvider implements ClusterSingletonService, BasicRpcTestService {

    private static final Logger LOG = LoggerFactory.getLogger(BasicRpcTestProvider.class);
    private static final ServiceGroupIdentifier IDENTIFIER = ServiceGroupIdentifier.create("Basic-rpc-test");

    private final RpcProviderRegistry rpcProviderRegistry;
    private final ClusterSingletonServiceProvider singletonService;
    private BindingAwareBroker.RpcRegistration<BasicRpcTestService> rpcRegistration;

    public BasicRpcTestProvider(final RpcProviderRegistry rpcProviderRegistry,
                                final ClusterSingletonServiceProvider singletonService) {
        this.rpcProviderRegistry = rpcProviderRegistry;
        this.singletonService = singletonService;

        singletonService.registerClusterSingletonService(this);
    }

    @Override
    public void instantiateServiceInstance() {
        LOG.info("Basic testing rpc registered as global");
        rpcRegistration = rpcProviderRegistry.addRpcImplementation(BasicRpcTestService.class, this);
    }

    @Override
    public ListenableFuture<Void> closeServiceInstance() {
        rpcRegistration.close();
        rpcRegistration = null;

        return Futures.immediateFuture(null);
    }

    @Override
    public ServiceGroupIdentifier getIdentifier() {
        return IDENTIFIER;
    }

    @Override
    public Future<RpcResult<Void>> basicGlobal() {
        LOG.info("Basic test global rpc invoked");

        return Futures.immediateFuture(RpcResultBuilder.<Void>success().build());
    }
}