google-nomulus/java/google/registry/model/billing/RegistrarBillingUtils.java
mcilwain 9f142c6767 Remove the util package's dependency on the config package
This allows us to use util methods from within config, which is a useful thing
to be able to do for, e.g., being able to log errors while loading configuration.
It makes sense that the util package should be at the very base of the
class inheritance hierarchy; config seems logically higher than it.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=144324273
2017-01-12 14:14:51 -05:00

97 lines
3.9 KiB
Java

// Copyright 2016 The Nomulus Authors. All Rights Reserved.
//
// 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 google.registry.model.billing;
import static google.registry.model.ofy.ObjectifyService.ofy;
import com.google.common.base.Function;
import com.google.common.base.Supplier;
import com.google.common.collect.FluentIterable;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSortedSet;
import com.google.common.collect.Maps;
import com.google.common.collect.Maps.EntryTransformer;
import com.google.common.collect.Ordering;
import com.googlecode.objectify.cmd.Query;
import google.registry.model.CacheUtils;
import google.registry.model.registrar.Registrar;
import google.registry.model.registry.Registries;
import google.registry.model.registry.Registry;
import java.util.Map;
import org.joda.money.CurrencyUnit;
import org.joda.money.Money;
/** Utilities for managing the billing of {@link Registrar} customers. */
public final class RegistrarBillingUtils {
private static final Supplier<ImmutableSortedSet<CurrencyUnit>> CURRENCIES_CACHE =
CacheUtils.memoizeWithShortExpiration(
new Supplier<ImmutableSortedSet<CurrencyUnit>>() {
@Override
public ImmutableSortedSet<CurrencyUnit> get() {
return FluentIterable
.from(Registries.getTlds())
.transform(new Function<String, CurrencyUnit>() {
@Override
public CurrencyUnit apply(String tld) {
return Registry.get(tld).getCurrency();
}})
.toSortedSet(Ordering.natural());
}
});
/**
* Returns set of currencies in which registrars may be billed.
*
* <p>Each TLD has a currency associated with it. We don't do conversions. The registrar customer
* gets a separate bill for each currency.
*/
public static ImmutableSortedSet<CurrencyUnit> getCurrencies() {
return CURRENCIES_CACHE.get();
}
/**
* Returns query of {@link RegistrarBillingEntry} for each currency, most recent first.
*
* <p><b>Note:</b> Currency map keys are returned in sorted order, from {@link #getCurrencies()}.
*/
public static ImmutableMap<CurrencyUnit, Query<RegistrarBillingEntry>> getBillingEntryQueries(
final Registrar registrar) {
return Maps.toMap(getCurrencies(),
new Function<CurrencyUnit, Query<RegistrarBillingEntry>>() {
@Override
public Query<RegistrarBillingEntry> apply(CurrencyUnit currency) {
return ofy().load()
.type(RegistrarBillingEntry.class)
.ancestor(registrar)
.filter("currency", currency)
.order("-created");
}});
}
/** Returns amount of money registrar currently owes registry in each currency. */
public static Map<CurrencyUnit, Money> loadBalance(Registrar registrar) {
return Maps.transformEntries(getBillingEntryQueries(registrar),
new EntryTransformer<CurrencyUnit, Query<RegistrarBillingEntry>, Money>() {
@Override
public Money transformEntry(
CurrencyUnit currency, Query<RegistrarBillingEntry> query) {
RegistrarBillingEntry entry = query.first().now();
return entry != null ? entry.getBalance() : Money.zero(currency);
}});
}
private RegistrarBillingUtils() {}
}