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org.apache.asterix.common.context.TransactionSubsystemProvider Maven / Gradle / Ivy
/*
* 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.asterix.common.context;
import org.apache.asterix.common.api.IAsterixAppRuntimeContext;
import org.apache.asterix.common.transactions.ITransactionSubsystem;
import org.apache.hyracks.api.context.IHyracksTaskContext;
/**
* The purpose of this provider is to work around a cyclic dependency between asterix-common and asterix-transactions.
* The operation callbacks would depend on the AsterixAppRuntimeContext to get the transaction subsystem,
* while at the same time the AsterixAppRuntimeContext depends on asterix-transactions for the TransactionSubsystem.
*/
public class TransactionSubsystemProvider implements ITransactionSubsystemProvider {
@Override
public ITransactionSubsystem getTransactionSubsystem(IHyracksTaskContext ctx) {
IAsterixAppRuntimeContext runtimeCtx = (IAsterixAppRuntimeContext) ctx.getJobletContext()
.getApplicationContext().getApplicationObject();
return runtimeCtx.getTransactionSubsystem();
}
}