com.datatorrent.stram.stream.InlineStream 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 com.datatorrent.stram.stream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.datatorrent.stram.engine.AbstractReservoir;
import com.datatorrent.stram.engine.Stream;
import com.datatorrent.stram.engine.StreamContext;
import com.datatorrent.stram.engine.SweepableReservoir;
import com.datatorrent.stram.tuple.Tuple;
/**
*
* When data exchange is needed between 2 operators deployed in the same container, they are connected using a
* blocking queue; The implementation of such a blocking queue is InlineStream.
*
* @since 0.3.2
*/
public class InlineStream implements Stream
{
private int count;
private AbstractReservoir reservoir;
public InlineStream(int capacity)
{
reservoir = AbstractReservoir.newReservoir("InlineStream", capacity);
}
public SweepableReservoir getReservoir()
{
return reservoir;
}
/**
*
* @param context
*/
@Override
public void setup(StreamContext context)
{
reservoir.setId(context.getId());
}
/**
*
* @param context
*/
@Override
public void activate(StreamContext context)
{
}
/**
*
*/
@Override
public void deactivate()
{
}
/**
*
*/
@Override
public void teardown()
{
}
@Override
public void put(Object tuple)
{
try {
reservoir.put(tuple);
if (!(tuple instanceof Tuple)) {
count++;
}
} catch (InterruptedException ie) {
logger.debug("Interrupted", ie);
throw new RuntimeException(ie);
}
}
@Override
public int getCount(boolean reset)
{
try {
return count;
} finally {
if (reset) {
count = 0;
}
}
}
@Override
public String toString()
{
return getClass().getName() + '@' + Integer.toHexString(hashCode()) + "{reservoir=" + getReservoir().toString() + '}';
}
private static final Logger logger = LoggerFactory.getLogger(InlineStream.class);
}
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