org.openo.commontosca.inventory.core.mongo.handler.data.MongoDataQueryRequestHandler.java Source code

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Here is the source code for org.openo.commontosca.inventory.core.mongo.handler.data.MongoDataQueryRequestHandler.java

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/**
 * Copyright  2017 ZTE Corporation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.openo.commontosca.inventory.core.mongo.handler.data;

import java.util.Collections;

import org.bson.Document;
import org.openo.commontosca.inventory.core.mongo.MongoQueryResult;
import org.openo.commontosca.inventory.core.mongo.MongoUtils;
import org.openo.commontosca.inventory.core.mongo.handler.AbstractMongoInventoryRequestHandler;
import org.openo.commontosca.inventory.core.verifier.CriteriaTypeVerifier;
import org.openo.commontosca.inventory.sdk.api.Criteria;
import org.openo.commontosca.inventory.sdk.api.data.ValueMap;
import org.openo.commontosca.inventory.sdk.api.deferred.SimpleDeferred;
import org.openo.commontosca.inventory.sdk.api.request.InventoryDataRequest.Query;
import org.openo.commontosca.inventory.sdk.api.result.QueryResult;
import org.openo.commontosca.inventory.sdk.support.DeferredResponse;
import org.openo.commontosca.inventory.sdk.support.result.HeapQueryResult;

import com.mongodb.async.client.FindIterable;

public class MongoDataQueryRequestHandler extends AbstractMongoInventoryRequestHandler<Query, QueryResult> {

    @Override
    public SimpleDeferred<QueryResult> handle(Query request) {
        String modelName = request.getModel();
        return request.getInventory().model().find().byName(modelName).executeAsync().then((result) -> {
            DeferredResponse<QueryResult> deferred = new DeferredResponse<>();
            ValueMap model = result.asOne();
            if (model == null) {
                return deferred.reject("No such model %s", modelName);
            } else {
                boolean isModelEnabled = model.optBoolean("enable", true);
                if (isModelEnabled) {
                    /*
                     * if (request.getDistinct() != null) { deferred = dealDistinctRequest(request, model); }
                     * else {
                     * 
                     * }
                     */
                    deferred = dealFindRequest(request, model);
                } else {
                    deferred.resolve(new HeapQueryResult(Collections.emptyList()));
                }

                return deferred;
            }
        });
    }

    // private DeferredResponse<QueryResult> dealDistinctRequest(Query request, ValueMap model) {
    // String dataKey = request.getDistinct();
    // Criteria filter = request.getFilter();
    // String modelName = request.getModel();
    // String modelCollectionName = MongoUtils.getModelCollectionName(modelName);
    // DeferredResponse<QueryResult> deferred = new DeferredResponse<>();
    // DistinctIterable<Document> distinctIterable = null;
    //
    // distinctIterable =
    // this.getDatabase(request).getCollection(modelCollectionName).distinct(dataKey, Document.class);
    //
    // if (filter != null) {
    // CriteriaTypeVerifier verifier = new CriteriaTypeVerifier(filter.toValueMap(), model);
    // Document document = new Document(verifier.verify());
    // distinctIterable.filter(document);
    // }
    //
    // distinctIterable.map(document -> ValueMap.wrap(document)).batchCursor((cursor, e) -> {
    // if (e != null) {
    // deferred.reject(e);
    // } else if (cursor != null) {
    // deferred.resolve(new MongoQueryResult(cursor));
    // } else {
    // deferred.resolve(new HeapQueryResult(Collections.emptyList()));
    // }
    // });
    // return deferred;
    // }

    private DeferredResponse<QueryResult> dealFindRequest(Query request, ValueMap model) {
        String modelName = request.getModel();
        String modelCollectionName = MongoUtils.getModelCollectionName(modelName);
        DeferredResponse<QueryResult> deferred = new DeferredResponse<>();

        FindIterable<Document> find = this.getDatabase(request).getCollection(modelCollectionName).find()
                .projection(MongoUtils.getProjectionForModel(model, request.getProjection()));
        Criteria filter = request.getFilter();
        if (filter != null) {
            CriteriaTypeVerifier verifier = new CriteriaTypeVerifier(filter.toValueMap(), model);
            find.filter(new Document(verifier.verify()));
        }
        if (request.getSkip() != null) {
            find.skip(request.getSkip());
        }
        if (request.getLimit() != null) {
            find.limit(request.getLimit());
        }
        if (request.getSort() != null) {
            find.sort(MongoUtils.getSortsFromMap(request.getSort()));
        }

        find.map(document -> ValueMap.wrap(document)).batchCursor((cursor, e) -> {
            if (e != null) {
                deferred.reject(e);
            } else if (cursor != null) {
                deferred.resolve(new MongoQueryResult(cursor));
            } else {
                deferred.resolve(new HeapQueryResult(Collections.emptyList()));
            }
        });
        return deferred;
    }

}