/**
* Copyright 2012 LiveRamp
*
* 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 com.liveramp.cascading_ext.operation;
import cascading.flow.Flow;
import cascading.flow.FlowProcess;
import cascading.operation.BaseOperation;
import cascading.operation.Buffer;
import cascading.operation.BufferCall;
import cascading.pipe.Every;
import cascading.pipe.GroupBy;
import cascading.pipe.Pipe;
import cascading.stats.FlowStats;
import cascading.tap.Tap;
import cascading.tuple.Fields;
import cascading.tuple.Tuple;
import com.liveramp.cascading_ext.BaseTestCase;
import com.liveramp.cascading_ext.CascadingUtil;
import com.liveramp.cascading_ext.counters.Counters;
import com.liveramp.cascading_ext.tap.NullTap;
import com.twitter.maple.tap.MemorySourceTap;
import junit.framework.Assert;
import org.junit.Test;
import java.util.Arrays;
public class TestBufferStats extends BaseTestCase {
@Test
public void run() {
Tap source = new MemorySourceTap(Arrays.asList(
new Tuple("A", true),
new Tuple("A", true),
new Tuple("A", true),
new Tuple("B", false)),
new Fields("field1", "field2"));
Pipe input = new Pipe("input");
input = new GroupBy(input, new Fields("field1"));
input = new Every(input, new BufferStats(new MyBuffer()));
Flow f = CascadingUtil.get().getFlowConnector().connect(source, new NullTap(), input);
f.complete();
Assert.assertEquals(2l, Counters.get(f, "TestBufferStats.java", "56 - MyBuffer - Output records").longValue());
Assert.assertEquals(2l, Counters.get(f, "TestBufferStats.java", "56 - MyBuffer - Input groups").longValue());
}
public static class MyBuffer extends BaseOperation<NoContext> implements Buffer<NoContext> {
@Override
public void operate(FlowProcess flowProcess, BufferCall<NoContext> noContextBufferCall) {
noContextBufferCall.getOutputCollector().add(new Tuple("1"));
}
}
}