dk.au.cs.karibu.testdoubles.FakeObjectStorage.java Source code

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Here is the source code for dk.au.cs.karibu.testdoubles.FakeObjectStorage.java

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/*
 * Copyright 2013 Henrik Baerbak Christensen, Aarhus University
 *
 * 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 dk.au.cs.karibu.testdoubles;

import java.util.*;

import com.mongodb.*;

import dk.au.cs.karibu.backend.ProcessingStrategy;

/** Fake Object storage that mimics MongoDB behaviour 
 * somewhat: It handles multiple collections 
 * and stores items in each collection as a list. 
 * 
 * Also it may mimic as replica set election exception
 * during storage.
 *  
 * @author Henrik Baerbak Christensen, Aarhus University 
 * 
 */

public class FakeObjectStorage implements ProcessingStrategy {
    private String toThrow;
    private int countOfStoresBeforeThrow = -1;
    private int storeMethodInvocationCount = 0;

    private Map<String, List<BasicDBObject>> database;

    public FakeObjectStorage() {
        database = new HashMap<String, List<BasicDBObject>>(10);
    }

    public List<BasicDBObject> getCollectionNamed(String collectionName) {
        return database.get(collectionName);
    }

    @Override
    public void process(String collectionName, BasicDBObject dbo) {
        if (storeMethodInvocationCount == countOfStoresBeforeThrow) {
            storeMethodInvocationCount++;
            throw new MongoException(toThrow);
        }
        storeMethodInvocationCount++;

        // System.out.println(" FakeObjectStorage: storing "+dbo);
        List<BasicDBObject> collection = database.get(collectionName);
        if (collection == null) {
            collection = new ArrayList<BasicDBObject>(2);
            database.put(collectionName, collection);
        }
        collection.add(dbo);
    }

    public void setExceptionTrigger(String exceptionMsg, int countBeforeThrow) {
        toThrow = exceptionMsg;
        countOfStoresBeforeThrow = countBeforeThrow;
    }
}