Github user jburwell commented on a diff in the pull request:
https://github.com/apache/cloudstack/pull/689#discussion_r37628668
--- Diff:
plugins/database/quota/src/org/apache/cloudstack/api/response/QuotaResponseBuilderImpl.java
---
@@ -0,0 +1,419 @@
+//Licensed to the Apache Software Foundation (ASF) under one
+//or more contributor license agreements. See the NOTICE file
+//distributed with this work for additional information
+//regarding copyright ownership. The ASF licenses this file
+//to you 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.apache.cloudstack.api.response;
+
+import com.cloud.exception.InvalidParameterValueException;
+import com.cloud.user.Account;
+import com.cloud.user.AccountVO;
+import com.cloud.user.User;
+import com.cloud.user.dao.AccountDao;
+import com.cloud.user.dao.UserDao;
+import com.cloud.utils.db.TransactionLegacy;
+
+import org.apache.cloudstack.api.command.QuotaBalanceCmd;
+import org.apache.cloudstack.api.command.QuotaEmailTemplateListCmd;
+import org.apache.cloudstack.api.command.QuotaEmailTemplateUpdateCmd;
+import org.apache.cloudstack.api.command.QuotaStatementCmd;
+import org.apache.cloudstack.api.command.QuotaTariffListCmd;
+import org.apache.cloudstack.api.command.QuotaTariffUpdateCmd;
+import org.apache.cloudstack.quota.QuotaService;
+import org.apache.cloudstack.quota.constant.QuotaConfig;
+import org.apache.cloudstack.quota.constant.QuotaTypes;
+import org.apache.cloudstack.quota.dao.QuotaBalanceDao;
+import org.apache.cloudstack.quota.dao.QuotaCreditsDao;
+import org.apache.cloudstack.quota.dao.QuotaEmailTemplatesDao;
+import org.apache.cloudstack.quota.dao.QuotaTariffDao;
+import org.apache.cloudstack.quota.vo.QuotaBalanceVO;
+import org.apache.cloudstack.quota.vo.QuotaCreditsVO;
+import org.apache.cloudstack.quota.vo.QuotaEmailTemplatesVO;
+import org.apache.cloudstack.quota.vo.QuotaTariffVO;
+import org.apache.cloudstack.quota.vo.QuotaUsageVO;
+import org.apache.cloudstack.region.RegionManager;
+import org.apache.commons.lang.StringEscapeUtils;
+import org.apache.log4j.Logger;
+import org.springframework.stereotype.Component;
+
+import javax.ejb.Local;
+import javax.inject.Inject;
+
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+
+@Component
+@Local(value = QuotaResponseBuilderImpl.class)
+public class QuotaResponseBuilderImpl implements QuotaResponseBuilder {
+ private static final Logger s_logger =
Logger.getLogger(QuotaResponseBuilderImpl.class.getName());
+
+ @Inject
+ private QuotaTariffDao _quotaTariffDao;
+ @Inject
+ private QuotaBalanceDao _quotaBalanceDao;
+ @Inject
+ private QuotaCreditsDao _quotaCreditsDao;
+ @Inject
+ private QuotaEmailTemplatesDao _quotaEmailTemplateDao;
+
+ @Inject
+ private UserDao _userDao;
+ @Inject
+ private QuotaService _quotaService;
+ @Inject
+ AccountDao _accountDao;
+ @Inject
+ private RegionManager _regionMgr;
+
+ @Override
+ public QuotaTariffResponse createQuotaTariffResponse(QuotaTariffVO
tariff) {
+ final QuotaTariffResponse response = new QuotaTariffResponse();
+ response.setUsageType(tariff.getUsageType());
+ response.setUsageName(tariff.getUsageName());
+ response.setUsageUnit(tariff.getUsageUnit());
+ response.setUsageDiscriminator(tariff.getUsageDiscriminator());
+ response.setTariffValue(tariff.getCurrencyValue());
+ response.setEffectiveOn(tariff.getEffectiveOn());
+ response.setDescription(tariff.getDescription());
+ response.setCurrency(QuotaConfig.QuotaCurrencySymbol.value());
+ return response;
+ }
+
+ @Override
+ public QuotaBalanceResponse
createQuotaBalanceResponse(List<QuotaBalanceVO> quotaBalance, Date startDate,
Date endDate) {
+ if (quotaBalance.size() == 0) {
+ new InvalidParameterValueException("The request period does
not contain balance entries.");
+ }
+ Collections.sort(quotaBalance, new Comparator<QuotaBalanceVO>() {
+ public int compare(QuotaBalanceVO o1, QuotaBalanceVO o2) {
+ return o2.getUpdatedOn().compareTo(o1.getUpdatedOn()); //
desc
+ }
+ });
+
+ int quota_activity = quotaBalance.size();
+ QuotaBalanceResponse resp = new QuotaBalanceResponse();
+ BigDecimal lastCredits = new BigDecimal(0);
+ boolean consecutive = true;
+ for (Iterator<QuotaBalanceVO> it = quotaBalance.iterator();
it.hasNext();) {
+ QuotaBalanceVO entry = it.next();
+ s_logger.info("createQuotaBalanceResponse: Date=" +
entry.getUpdatedOn().toGMTString() + " balance=" + entry.getCreditBalance() + "
credit=" + entry.getCreditsId());
+ if (entry.getCreditsId() > 0) {
+ if (consecutive) {
+ lastCredits =
lastCredits.add(entry.getCreditBalance());
+ }
+ resp.addCredits(entry);
+ it.remove();
--- End diff --
@abhinandanprateek this issue is not whether or not it is the correct way
to modify a list, but whether or not that list should be modified.
``quotaBalance`` is passed into the method. Therefore, ``it.remove()`` is
modifying a list referenced by the caller -- causing unexpected side effects.
To avoid these effects, consider copying the contents of ``quotaBalance`` to a
new list (e.g. ``final List<QuotaBalanceVO> updatedBalances = new
ArrayList<>(quotaBalance)``) and modifying the copied list.
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