/*
* Copyright © 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.cdap.internal.app.runtime;
import co.cask.cdap.api.data.DataSetContext;
import co.cask.cdap.app.program.Program;
import co.cask.cdap.common.queue.QueueName;
import co.cask.cdap.data.dataset.DataSetInstantiator;
import co.cask.cdap.data2.queue.ConsumerConfig;
import co.cask.cdap.data2.queue.QueueClientFactory;
import co.cask.cdap.data2.queue.QueueConsumer;
import co.cask.cdap.data2.queue.QueueProducer;
import co.cask.cdap.data2.transaction.queue.QueueMetrics;
import co.cask.cdap.data2.transaction.stream.ForwardingStreamConsumer;
import co.cask.cdap.data2.transaction.stream.StreamConsumer;
import co.cask.cdap.data2.transaction.stream.StreamConsumerFactory;
import co.cask.cdap.proto.Id;
import co.cask.tephra.TransactionAware;
import co.cask.tephra.TransactionContext;
import co.cask.tephra.TransactionExecutor;
import co.cask.tephra.TransactionExecutorFactory;
import co.cask.tephra.TransactionSystemClient;
import java.io.IOException;
/**
* Abstract base class for implementing DataFabricFacade.
*/
public abstract class AbstractDataFabricFacade implements DataFabricFacade {
private final DataSetInstantiator dataSetContext;
private final QueueClientFactory queueClientFactory;
private final StreamConsumerFactory streamConsumerFactory;
private final TransactionExecutorFactory txExecutorFactory;
private final TransactionSystemClient txSystemClient;
private final Id.Program programId;
public AbstractDataFabricFacade(TransactionSystemClient txSystemClient, TransactionExecutorFactory txExecutorFactory,
QueueClientFactory queueClientFactory, StreamConsumerFactory streamConsumerFactory,
Program program, DataSetInstantiator dataSetContext) {
this.txSystemClient = txSystemClient;
this.queueClientFactory = queueClientFactory;
this.streamConsumerFactory = streamConsumerFactory;
this.txExecutorFactory = txExecutorFactory;
this.dataSetContext = dataSetContext;
this.programId = program.getId();
}
@Override
public DataSetContext getDataSetContext() {
return dataSetContext;
}
@Override
public TransactionContext createTransactionManager() {
return new TransactionContext(txSystemClient, dataSetContext.getTransactionAware());
}
@Override
public TransactionExecutor createTransactionExecutor() {
return txExecutorFactory.createExecutor(dataSetContext.getTransactionAware());
}
@Override
public QueueProducer createProducer(QueueName queueName) throws IOException {
return createProducer(queueName, QueueMetrics.NOOP_QUEUE_METRICS);
}
@Override
public QueueConsumer createConsumer(QueueName queueName,
ConsumerConfig consumerConfig, int numGroups) throws IOException {
QueueConsumer consumer = queueClientFactory.createConsumer(queueName, consumerConfig, numGroups);
if (consumer instanceof TransactionAware) {
consumer = new CloseableQueueConsumer(dataSetContext, consumer);
dataSetContext.addTransactionAware((TransactionAware) consumer);
}
return consumer;
}
@Override
public QueueProducer createProducer(QueueName queueName, QueueMetrics queueMetrics) throws IOException {
QueueProducer producer = queueClientFactory.createProducer(queueName, queueMetrics);
if (producer instanceof TransactionAware) {
dataSetContext.addTransactionAware((TransactionAware) producer);
}
return producer;
}
@Override
public StreamConsumer createStreamConsumer(QueueName streamName, ConsumerConfig consumerConfig) throws IOException {
String namespace = String.format("%s.%s", programId.getApplicationId(), programId.getId());
final StreamConsumer consumer = streamConsumerFactory.create(streamName, namespace, consumerConfig);
dataSetContext.addTransactionAware(consumer);
return new ForwardingStreamConsumer(consumer) {
@Override
public void close() throws IOException {
super.close();
dataSetContext.removeTransactionAware(consumer);
}
};
}
}