/*
* Copyright 2013 Basho Technologies 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 com.basho.riak.client.core.operations.itest;
import com.basho.riak.client.core.operations.MapReduceOperation;
import com.basho.riak.client.core.operations.StoreOperation;
import static com.basho.riak.client.core.operations.itest.ITestBase.bucketName;
import com.basho.riak.client.core.query.Location;
import com.basho.riak.client.core.query.Namespace;
import com.basho.riak.client.core.query.RiakObject;
import com.basho.riak.client.core.util.BinaryValue;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;
import org.junit.Test;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assume.assumeTrue;
/**
*
* @author Brian Roach <roach at basho dot com>
* @since 2.0
*/
public class ITestMapReduceOperation extends ITestBase
{
@Test
public void testBasicMRDefaultType() throws InterruptedException, ExecutionException, IOException
{
// This will currently fail as the 4 arity input in broken in Riak. Specifying
// "default" doesn't work. I've worked around this in the User API.
testBasicMR(new Namespace(Namespace.DEFAULT_BUCKET_TYPE, bucketName.toString()));
}
@Test
public void testBasicMRTestType() throws InterruptedException, ExecutionException, IOException
{
assumeTrue(testBucketType);
testBasicMR(new Namespace(bucketType, bucketName));
}
private void testBasicMR(Namespace namespace) throws InterruptedException, ExecutionException, IOException
{
RiakObject obj = new RiakObject();
obj.setValue(BinaryValue.create("Alice was beginning to get very tired of sitting by her sister on the " +
"bank, and of having nothing to do: once or twice she had peeped into the " +
"book her sister was reading, but it had no pictures or conversations in " +
"it, 'and what is the use of a book,' thought Alice 'without pictures or " +
"conversation?'"));
Location location = new Location(namespace, BinaryValue.unsafeCreate("p1".getBytes()));
StoreOperation storeOp =
new StoreOperation.Builder(location)
.withContent(obj)
.build();
cluster.execute(storeOp);
storeOp.get();
obj.setValue(BinaryValue.create("So she was considering in her own mind (as well as she could, for the " +
"hot day made her feel very sleepy and stupid), whether the pleasure " +
"of making a daisy-chain would be worth the trouble of getting up and " +
"picking the daisies, when suddenly a White Rabbit with pink eyes ran " +
"close by her."));
location = new Location(namespace, BinaryValue.unsafeCreate("p2".getBytes()));
storeOp =
new StoreOperation.Builder(location)
.withContent(obj)
.build();
cluster.execute(storeOp);
storeOp.get();
obj.setValue(BinaryValue.create("The rabbit-hole went straight on like a tunnel for some way, and then " +
"dipped suddenly down, so suddenly that Alice had not a moment to think " +
"about stopping herself before she found herself falling down a very deep " +
"well."));
location = new Location(namespace, BinaryValue.unsafeCreate("p3".getBytes()));
storeOp =
new StoreOperation.Builder(location)
.withContent(obj)
.build();
cluster.execute(storeOp);
storeOp.get();
String bName = namespace.getBucketNameAsString();
String bType = namespace.getBucketTypeAsString();
String query = "{\"inputs\":[[\"" + bName + "\",\"p1\",\"\",\"" + bType + "\"]," +
"[\"" + bName + "\",\"p2\",\"\",\"" + bType + "\"]," +
"[\"" + bName + "\",\"p3\",\"\",\"" + bType + "\"]]," +
"\"query\":[{\"map\":{\"language\":\"javascript\",\"source\":\"" +
"function(v) {var m = v.values[0].data.toLowerCase().match(/\\w*/g); var r = [];" +
"for(var i in m) {if(m[i] != '') {var o = {};o[m[i]] = 1;r.push(o);}}return r;}" +
"\"}},{\"reduce\":{\"language\":\"javascript\",\"source\":\"" +
"function(v) {var r = {};for(var i in v) {for(var w in v[i]) {if(w in r) r[w] += v[i][w];" +
"else r[w] = v[i][w];}}return [r];}\"}}]}";
MapReduceOperation mrOp =
new MapReduceOperation.Builder(BinaryValue.unsafeCreate(query.getBytes()))
.build();
cluster.execute(mrOp);
mrOp.await();
assertTrue(mrOp.isSuccess());
ArrayNode resultList = mrOp.get().getResults().get(1);
// The query should return one result which is a JSON array containing a
// single JSON object that is a asSet of word counts.
assertEquals(resultList.size(), 1);
String json = resultList.get(0).toString();
ObjectMapper oMapper = new ObjectMapper();
@SuppressWarnings("unchecked")
Map<String, Integer> resultMap = oMapper.readValue(json, Map.class);
assertNotNull(resultMap.containsKey("the"));
assertEquals(Integer.valueOf(8),resultMap.get("the"));
resetAndEmptyBucket(namespace);
}
}