com.chessix.vas.service.RdbmsStorage.java Source code

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Here is the source code for com.chessix.vas.service.RdbmsStorage.java

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/******************************************************************************
 Copyright 2014 Mark Wigmans
    
 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 com.chessix.vas.service;

import com.chessix.vas.actors.messages.JournalMessage;
import com.chessix.vas.db.Account;
import com.chessix.vas.db.DBService;
import com.google.common.base.Function;
import com.google.common.collect.Lists;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;

import java.util.List;

/**
 * RDBMS/JPA storage version of the {@code ISpeedStorage} interface.
 *
 * @author Mark Wigmans
 */
public class RdbmsStorage implements ISpeedStorage {

    private final static int PAGE_SIZE = 1000;

    private final DBService dbService;

    public RdbmsStorage(final DBService dbService) {
        super();
        this.dbService = dbService;
    }

    @Override
    public Integer get(final String clasId, final String accountId) {
        final Account account = dbService.findAccount(clasId, accountId);
        if (account != null) {
            return account.getBalance();
        }
        return null;
    }

    @Override
    public List<Integer> accountValues(final String clasId) {
        final List<Integer> result = Lists.newLinkedList();
        int page = 0;
        Page<Account> accounts;
        do {
            accounts = dbService.findAccountsByClas(clasId, new PageRequest(page, PAGE_SIZE));
            result.addAll(Lists.transform(accounts.getContent(), new Function<Account, Integer>() {

                @Override
                public Integer apply(final Account input) {
                    return input.getBalance();
                }
            }));

            page += 1;
        } while (accounts.hasNext());

        return result;
    }

    @Override
    public Long size(final String clasId) {
        return dbService.count(clasId);
    }

    @Override
    public void transfer(final String clasId, final String fromAccountId, final String toAccountId,
            final int value) {
        dbService.createTransfer(
                new JournalMessage.TransferBuilder(clasId, fromAccountId, toAccountId, value).build());
    }

    @Override
    public boolean create(final String clasId) {
        dbService.createClas(new JournalMessage.ClasCreatedBuilder(clasId).build());
        return true;
    }

    @Override
    public boolean create(final String clasId, final String accountId) {
        dbService.createAccount(new JournalMessage.AccountCreatedBuilder(clasId, accountId).build());
        return true;
    }

    @Override
    public void delete(final String clasId) {
        dbService.clean(new JournalMessage.CleanBuilder(clasId).build());
    }
}