/*
* Copyright 2010-2013 Ning, Inc.
*
* Ning 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 com.ning.billing.entitlement.dao;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
import java.util.UUID;
import javax.annotation.Nullable;
import javax.inject.Inject;
import org.skife.jdbi.v2.IDBI;
import com.ning.billing.callcontext.InternalCallContext;
import com.ning.billing.callcontext.InternalTenantContext;
import com.ning.billing.clock.Clock;
import com.ning.billing.entitlement.api.BlockingState;
import com.ning.billing.util.cache.CacheControllerDispatcher;
import com.ning.billing.util.dao.NonEntityDao;
import com.ning.billing.util.entity.dao.EntitySqlDao;
import com.ning.billing.util.entity.dao.EntitySqlDaoTransactionWrapper;
import com.ning.billing.util.entity.dao.EntitySqlDaoTransactionalJdbiWrapper;
import com.ning.billing.util.entity.dao.EntitySqlDaoWrapperFactory;
import com.google.common.base.Function;
import com.google.common.collect.Collections2;
import com.google.common.collect.Ordering;
public class DefaultBlockingStateDao implements BlockingStateDao {
private final EntitySqlDaoTransactionalJdbiWrapper transactionalSqlDao;
private final Clock clock;
@Inject
public DefaultBlockingStateDao(final IDBI dbi, final Clock clock, final CacheControllerDispatcher cacheControllerDispatcher, final NonEntityDao nonEntityDao) {
this.transactionalSqlDao = new EntitySqlDaoTransactionalJdbiWrapper(dbi, clock, cacheControllerDispatcher, nonEntityDao);
this.clock = clock;
}
@Override
public BlockingState getBlockingStateForService(final UUID blockableId, final String serviceName, final InternalTenantContext context) {
return transactionalSqlDao.execute(new EntitySqlDaoTransactionWrapper<BlockingState>() {
@Override
public BlockingState inTransaction(final EntitySqlDaoWrapperFactory<EntitySqlDao> entitySqlDaoWrapperFactory) throws Exception {
final BlockingStateModelDao model = entitySqlDaoWrapperFactory.become(BlockingStateSqlDao.class).getBlockingStateForService(blockableId, serviceName, clock.getUTCNow().toDate(), context);
return BlockingStateModelDao.toBlockingState(model);
}
});
}
@Override
public List<BlockingState> getBlockingState(final UUID blockableId, final InternalTenantContext context) {
return transactionalSqlDao.execute(new EntitySqlDaoTransactionWrapper<List<BlockingState>>() {
@Override
public List<BlockingState> inTransaction(final EntitySqlDaoWrapperFactory<EntitySqlDao> entitySqlDaoWrapperFactory) throws Exception {
final List<BlockingStateModelDao> models = entitySqlDaoWrapperFactory.become(BlockingStateSqlDao.class).getBlockingState(blockableId, clock.getUTCNow().toDate(), context);
return new ArrayList<BlockingState>(Collections2.transform(models, new Function<BlockingStateModelDao, BlockingState>() {
@Override
public BlockingState apply(@Nullable final BlockingStateModelDao src) {
return BlockingStateModelDao.toBlockingState(src);
}
}));
}
});
}
@Override
public List<BlockingState> getBlockingHistoryForService(final UUID blockableId, final String serviceName, final InternalTenantContext context) {
return transactionalSqlDao.execute(new EntitySqlDaoTransactionWrapper<List<BlockingState>>() {
@Override
public List<BlockingState> inTransaction(final EntitySqlDaoWrapperFactory<EntitySqlDao> entitySqlDaoWrapperFactory) throws Exception {
final List<BlockingStateModelDao> models = entitySqlDaoWrapperFactory.become(BlockingStateSqlDao.class).getBlockingHistoryForService(blockableId, serviceName, clock.getUTCNow().toDate(), context);
return new ArrayList<BlockingState>(Collections2.transform(models, new Function<BlockingStateModelDao, BlockingState>() {
@Override
public BlockingState apply(@Nullable final BlockingStateModelDao src) {
return BlockingStateModelDao.toBlockingState(src);
}
}));
}
});
}
@Override
public List<BlockingState> getBlockingHistory(final UUID blockableId, final InternalTenantContext context) {
return transactionalSqlDao.execute(new EntitySqlDaoTransactionWrapper<List<BlockingState>>() {
@Override
public List<BlockingState> inTransaction(final EntitySqlDaoWrapperFactory<EntitySqlDao> entitySqlDaoWrapperFactory) throws Exception {
final List<BlockingStateModelDao> models = entitySqlDaoWrapperFactory.become(BlockingStateSqlDao.class).getBlockingHistory(blockableId, clock.getUTCNow().toDate(), context);
return new ArrayList<BlockingState>(Collections2.transform(models, new Function<BlockingStateModelDao, BlockingState>() {
@Override
public BlockingState apply(@Nullable final BlockingStateModelDao src) {
return BlockingStateModelDao.toBlockingState(src);
}
}));
}
});
}
@Override
public List<BlockingState> getBlockingAll(final UUID blockableId, final InternalTenantContext context) {
return transactionalSqlDao.execute(new EntitySqlDaoTransactionWrapper<List<BlockingState>>() {
@Override
public List<BlockingState> inTransaction(final EntitySqlDaoWrapperFactory<EntitySqlDao> entitySqlDaoWrapperFactory) throws Exception {
final List<BlockingStateModelDao> models = entitySqlDaoWrapperFactory.become(BlockingStateSqlDao.class).getBlockingAll(blockableId, context);
return new ArrayList<BlockingState>(Collections2.transform(models, new Function<BlockingStateModelDao, BlockingState>() {
@Override
public BlockingState apply(@Nullable final BlockingStateModelDao src) {
return BlockingStateModelDao.toBlockingState(src);
}
}));
}
});
}
@Override
public List<BlockingState> getBlockingAllForAccountRecordId(final InternalTenantContext context) {
return transactionalSqlDao.execute(new EntitySqlDaoTransactionWrapper<List<BlockingState>>() {
@Override
public List<BlockingState> inTransaction(final EntitySqlDaoWrapperFactory<EntitySqlDao> entitySqlDaoWrapperFactory) throws Exception {
final List<BlockingStateModelDao> models = entitySqlDaoWrapperFactory.become(BlockingStateSqlDao.class).getByAccountRecordId(context);
return new ArrayList<BlockingState>(Collections2.transform(models, new Function<BlockingStateModelDao, BlockingState>() {
@Override
public BlockingState apply(@Nullable final BlockingStateModelDao src) {
return BlockingStateModelDao.toBlockingState(src);
}
}));
}
});
}
@Override
public void setBlockingState(final BlockingState state, final Clock clock, final InternalCallContext context) {
transactionalSqlDao.execute(new EntitySqlDaoTransactionWrapper<Void>() {
@Override
public Void inTransaction(final EntitySqlDaoWrapperFactory<EntitySqlDao> entitySqlDaoWrapperFactory) throws Exception {
final BlockingStateModelDao newBlockingStateModelDao = new BlockingStateModelDao(state, context);
final BlockingStateSqlDao sqlDao = entitySqlDaoWrapperFactory.become(BlockingStateSqlDao.class);
// Get all blocking states for that blocked id and service
final List<BlockingStateModelDao> allForBlockedItAndService = sqlDao.getBlockingHistoryForService(state.getBlockedId(), state.getService(), clock.getUTCNow().toDate(), context);
// Add the new one (we rely below on the fact that the ID for newBlockingStateModelDao is now set)
allForBlockedItAndService.add(newBlockingStateModelDao);
// Re-order what should be the final list (allForBlockedItAndService is ordered by record_id in the SQL and we just added a new state)
final List<BlockingStateModelDao> allForBlockedItAndServiceOrdered = Ordering.<BlockingStateModelDao>from(new Comparator<BlockingStateModelDao>() {
@Override
public int compare(final BlockingStateModelDao o1, final BlockingStateModelDao o2) {
// effective_date column NOT NULL
final int comparison = o1.getEffectiveDate().compareTo(o2.getEffectiveDate());
if (comparison == 0) {
// Keep a stable ordering for ties
return o1.getCreatedDate().compareTo(o2.getCreatedDate());
} else {
return comparison;
}
}
}).immutableSortedCopy(allForBlockedItAndService);
// Go through the (ordered) stream of blocking states for that blocked id and service and check
// if there is one or more blocking states for the same state following each others.
// If there are, delete them, as they are not needed anymore. A picture being worth a thousand words,
// if the current stream is: t0 S1 t1 S2 t3 S3 and we want to insert S2 at t0 < t1' < t1,
// the final stream should be: t0 S1 t1' S2 t3 S3 (and not t0 S1 t1' S2 t1 S2 t3 S3)
// Note that we also take care of the use case t0 S1 t1 S2 t2 S2 t3 S3 to cleanup legacy systems, although
// it shouldn't happen anymore
final Collection<UUID> blockingStatesToRemove = new HashSet<UUID>();
BlockingStateModelDao prevBlockingStateModelDao = null;
for (final BlockingStateModelDao blockingStateModelDao : allForBlockedItAndServiceOrdered) {
if (prevBlockingStateModelDao != null && prevBlockingStateModelDao.getState().equals(blockingStateModelDao.getState())) {
blockingStatesToRemove.add(blockingStateModelDao.getId());
}
prevBlockingStateModelDao = blockingStateModelDao;
}
// Delete unnecessary states (except newBlockingStateModelDao, which doesn't exist in the database)
for (final UUID blockedId : blockingStatesToRemove) {
if (!newBlockingStateModelDao.getId().equals(blockedId)) {
sqlDao.unactiveEvent(blockedId.toString(), context);
}
}
// Create the state, if needed
if (!blockingStatesToRemove.contains(newBlockingStateModelDao.getId())) {
sqlDao.create(new BlockingStateModelDao(state, context), context);
}
return null;
}
});
}
@Override
public void unactiveBlockingState(final UUID id, final InternalCallContext context) {
transactionalSqlDao.execute(new EntitySqlDaoTransactionWrapper<Void>() {
@Override
public Void inTransaction(final EntitySqlDaoWrapperFactory<EntitySqlDao> entitySqlDaoWrapperFactory) throws Exception {
final BlockingStateSqlDao sqlDao = entitySqlDaoWrapperFactory.become(BlockingStateSqlDao.class);
sqlDao.unactiveEvent(id.toString(), context);
return null;
}
});
}
}