co.cask.tigon.internal.app.runtime.AbstractDataFabricFacade.java Source code

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Here is the source code for co.cask.tigon.internal.app.runtime.AbstractDataFabricFacade.java

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/*
 * 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.tigon.internal.app.runtime;

import co.cask.tephra.TransactionAware;
import co.cask.tephra.TransactionContext;
import co.cask.tephra.TransactionSystemClient;
import co.cask.tigon.data.queue.ConsumerConfig;
import co.cask.tigon.data.queue.QueueClientFactory;
import co.cask.tigon.data.queue.QueueConsumer;
import co.cask.tigon.data.queue.QueueName;
import co.cask.tigon.data.queue.QueueProducer;
import co.cask.tigon.data.transaction.queue.QueueMetrics;
import com.google.common.collect.Iterables;
import com.google.common.collect.Sets;

import java.io.IOException;
import java.util.Set;

/**
 * Abstract base class for implementing DataFabricFacade.
 */
public abstract class AbstractDataFabricFacade implements DataFabricFacade {

    private final QueueClientFactory queueClientFactory;
    private final TransactionSystemClient txSystemClient;
    private final Set<TransactionAware> txAware = Sets.newIdentityHashSet();

    public AbstractDataFabricFacade(TransactionSystemClient txSystemClient, QueueClientFactory queueClientFactory) {
        this.txSystemClient = txSystemClient;
        this.queueClientFactory = queueClientFactory;
    }

    @Override
    public TransactionContext createTransactionManager() {
        return new TransactionContext(txSystemClient, Iterables.unmodifiableIterable(txAware));
    }

    @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(this, consumer);
            txAware.add((TransactionAware) consumer);
        }
        return consumer;
    }

    @Override
    public QueueProducer createProducer(QueueName queueName, QueueMetrics queueMetrics) throws IOException {
        QueueProducer producer = queueClientFactory.createProducer(queueName, queueMetrics);
        if (producer instanceof TransactionAware) {
            txAware.add((TransactionAware) producer);
        }
        return producer;
    }

    public void removeTransactionAware(TransactionAware transactionAware) {
        txAware.remove(transactionAware);
    }
}