Java tutorial
/* * Copyright 2015 Yale University 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.alto.basic.endpointcostservice.impl.base; import com.google.common.util.concurrent.Futures; import com.google.common.util.concurrent.ListenableFuture; import org.opendaylight.controller.md.sal.binding.api.DataBroker; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.core.types.rev150921.CostTypeData; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rev151021.QueryInput; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rev151021.QueryOutput; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rev151021.QueryOutputBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rev151021.ResourceTypeEndpointcost; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rev151021.alto.request.endpointcost.request.EndpointcostRequest; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rev151021.alto.response.endpointcost.response.EndpointcostResponseBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rev151021.endpointcost.request.data.EndpointcostParams; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rfc7285.rev151021.TypedAddressData; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rfc7285.rev151021.endpoint.filter.data.EndpointFilter; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rfc7285.rev151021.endpointcostmap.response.data.EndpointCostMapBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rfc7285.rev151021.endpointcostmap.response.data.endpoint.cost.map.EndpointCost; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rfc7285.rev151021.endpointcostmap.response.data.endpoint.cost.map.EndpointCostBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rfc7285.rev151021.endpointcostmap.response.data.endpoint.cost.map.endpoint.cost.Cost; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rfc7285.rev151021.endpointcostmap.response.data.endpoint.cost.map.endpoint.cost.DestinationBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rfc7285.rev151021.endpointcostmap.response.data.endpoint.cost.map.endpoint.cost.SourceBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rfc7285.rev151021.query.input.request.endpointcost.request.endpointcost.params.filter.EndpointFilterData; import org.opendaylight.yang.gen.v1.urn.opendaylight.alto.service.model.endpointcost.rfc7285.rev151021.query.output.response.endpointcost.response.endpointcost.data.EndpointCostmapDataBuilder; import org.opendaylight.yangtools.yang.common.RpcError; import org.opendaylight.yangtools.yang.common.RpcResult; import org.opendaylight.yangtools.yang.common.RpcResultBuilder; import java.util.ArrayList; import java.util.List; public abstract class BaseECSImplementation { protected DataBroker dataBroker; private RpcResult<QueryOutput> ecsOutput; protected EndpointcostRequest request; protected EndpointcostParams params; protected CostTypeData costType; protected EndpointFilter filter; public ListenableFuture<RpcResult<QueryOutput>> getECS(QueryInput input) { if (checkInput(input) && postCheck(input)) { buildEndpointCostServiceOutput(input); } return Futures.immediateFuture(ecsOutput); } private void buildEndpointCostServiceOutput(QueryInput input) { request = (EndpointcostRequest) input.getRequest(); params = request.getEndpointcostParams(); costType = params.getCostType(); filter = ((EndpointFilterData) params.getFilter()).getEndpointFilter(); List<EndpointCost> ecmList = buildEndpointCostMapList(filter.getSource(), filter.getDestination(), costType); buildEndpointCostServiceOutput(ecmList); } private void buildEndpointCostServiceOutput(List<EndpointCost> ecmList) { EndpointCostMapBuilder endpointCostMapBuilder = new EndpointCostMapBuilder().setEndpointCost(ecmList); EndpointCostmapDataBuilder endpointCostmapDataBuilder = new EndpointCostmapDataBuilder() .setEndpointCostMap(endpointCostMapBuilder.build()); EndpointcostResponseBuilder endpointcostResponseBuilder = new EndpointcostResponseBuilder() .setEndpointcostData(endpointCostmapDataBuilder.build()); QueryOutputBuilder queryOutputBuilder = new QueryOutputBuilder() .setResponse(endpointcostResponseBuilder.build()).setType(ResourceTypeEndpointcost.class); if (queryOutputBuilder != null) { this.ecsOutput = RpcResultBuilder.success(queryOutputBuilder).build(); } else { this.ecsOutput = buildErrorRpcResult("Invalid output value ", "output is null"); } } private List<EndpointCost> buildEndpointCostMapList(List<? extends TypedAddressData> source, List<? extends TypedAddressData> destination, CostTypeData costType) { List<EndpointCost> ecmList = new ArrayList<EndpointCost>(); for (TypedAddressData src : source) { for (TypedAddressData dst : destination) { Cost cost = getCost(src, dst, costType); ecmList.add(buildEndpointCost(src, dst, cost)); } } //TODO operate oridinal return ecmList; } private EndpointCost buildEndpointCost(TypedAddressData src, TypedAddressData dst, Cost cost) { EndpointCost endpointCost = null; SourceBuilder sourceBuilder = new SourceBuilder(); DestinationBuilder destinationBuilder = new DestinationBuilder(); endpointCost = new EndpointCostBuilder().setCost(cost) .setSource(sourceBuilder.setAddress(src.getAddress()).build()) .setDestination(destinationBuilder.setAddress(dst.getAddress()).build()).build(); return endpointCost; } private Cost getCost(TypedAddressData src, TypedAddressData dst, CostTypeData costType) { if (validSrcDstIpPair(src, dst)) { return computeCost(src, dst, costType); } return null; } protected abstract Cost computeCost(TypedAddressData src, TypedAddressData dst, CostTypeData costType); private boolean validSrcDstIpPair(TypedAddressData src, TypedAddressData dst) { return true; } /** * @param input is the input of ECS. * @return true if input is validate. */ public boolean checkInput(QueryInput input) { request = (EndpointcostRequest) input.getRequest(); params = request.getEndpointcostParams(); costType = params.getCostType(); filter = ((EndpointFilterData) params.getFilter()).getEndpointFilter(); if (costType == null) { ecsOutput = buildErrorRpcResult("Invalid cost-type value ", "CostType is null"); return false; } if (!(params.getFilter() instanceof EndpointFilterData) || filter == null) { ecsOutput = buildErrorRpcResult("Invalid endpoints value ", "Endpoints is null"); return false; } return true; } protected boolean postCheck(QueryInput input) { return true; } /** * @param errorCode * @param errorMessage * @return built RPC error result. */ protected RpcResult<QueryOutput> buildErrorRpcResult(String errorCode, String errorMessage) { return RpcResultBuilder.<QueryOutput>failed() .withError(RpcError.ErrorType.APPLICATION, errorCode, errorMessage).build(); } }