/*
* Copyright © 2012-2014 Cask Data, Inc.
*
* 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 co.cask.tephra.distributed;
import co.cask.tephra.Transaction;
import co.cask.tephra.TransactionType;
import co.cask.tephra.distributed.thrift.TTransaction;
import co.cask.tephra.distributed.thrift.TTransactionType;
import co.cask.tephra.distributed.thrift.TVisibilityLevel;
import com.google.common.primitives.Longs;
/**
* Utility methods to convert to thrift and back.
*/
public final class TransactionConverterUtils {
private static final long[] EMPTY_LONG_ARRAY = {};
public static TTransaction wrap(Transaction tx) {
return new TTransaction(tx.getTransactionId(), tx.getReadPointer(),
Longs.asList(tx.getInvalids()), Longs.asList(tx.getInProgress()),
tx.getFirstShortInProgress(), getTTransactionType(tx.getType()),
tx.getWritePointer(), Longs.asList(tx.getCheckpointWritePointers()),
getTVisibilityLevel(tx.getVisibilityLevel()));
}
public static Transaction unwrap(TTransaction thriftTx) {
return new Transaction(thriftTx.getReadPointer(), thriftTx.getTransactionId(), thriftTx.getWritePointer(),
thriftTx.getInvalids() == null ? EMPTY_LONG_ARRAY : Longs.toArray(thriftTx.getInvalids()),
thriftTx.getInProgress() == null ? EMPTY_LONG_ARRAY :
Longs.toArray(thriftTx.getInProgress()),
thriftTx.getFirstShort(), getTransactionType(thriftTx.getType()),
thriftTx.getCheckpointWritePointers() == null ? EMPTY_LONG_ARRAY :
Longs.toArray(thriftTx.getCheckpointWritePointers()),
getVisibilityLevel(thriftTx.getVisibilityLevel()));
}
private static TransactionType getTransactionType(TTransactionType tType) {
return tType == TTransactionType.SHORT ? TransactionType.SHORT : TransactionType.LONG;
}
private static TTransactionType getTTransactionType(TransactionType type) {
return type == TransactionType.SHORT ? TTransactionType.SHORT : TTransactionType.LONG;
}
private static Transaction.VisibilityLevel getVisibilityLevel(TVisibilityLevel tLevel) {
// default to SNAPSHOT
if (tLevel == null) {
return Transaction.VisibilityLevel.SNAPSHOT;
}
switch (tLevel) {
case SNAPSHOT:
return Transaction.VisibilityLevel.SNAPSHOT;
case SNAPSHOT_EXCLUDE_CURRENT:
return Transaction.VisibilityLevel.SNAPSHOT_EXCLUDE_CURRENT;
case SNAPSHOT_ALL:
return Transaction.VisibilityLevel.SNAPSHOT_ALL;
default:
throw new IllegalArgumentException("Unknown TVisibilityLevel: " + tLevel);
}
}
private static TVisibilityLevel getTVisibilityLevel(Transaction.VisibilityLevel level) {
switch (level) {
case SNAPSHOT:
return TVisibilityLevel.SNAPSHOT;
case SNAPSHOT_EXCLUDE_CURRENT:
return TVisibilityLevel.SNAPSHOT_EXCLUDE_CURRENT;
case SNAPSHOT_ALL:
return TVisibilityLevel.SNAPSHOT_ALL;
default:
throw new IllegalArgumentException("Unknown VisibilityLevel: " + level);
}
}
}