/*
* Copyright 2011-2014 the original author or authors.
*
* 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 org.springframework.data.mongodb.core.mapreduce;
import static org.hamcrest.CoreMatchers.*;
import static org.junit.Assert.*;
import static org.springframework.data.mongodb.core.mapreduce.GroupBy.*;
import static org.springframework.data.mongodb.core.query.Criteria.*;
import java.util.Arrays;
import java.util.HashSet;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.data.mongodb.MongoDbFactory;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.convert.DbRefResolver;
import org.springframework.data.mongodb.core.convert.DefaultDbRefResolver;
import org.springframework.data.mongodb.core.convert.MappingMongoConverter;
import org.springframework.data.mongodb.core.mapping.MongoMappingContext;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import com.mongodb.BasicDBObject;
import com.mongodb.DBCollection;
import com.mongodb.DBObject;
import com.mongodb.Mongo;
/**
* Integration tests for group-by operations.
*
* @author Mark Pollack
* @author Oliver Gierke
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:infrastructure.xml")
public class GroupByTests {
@Autowired MongoDbFactory factory;
@Autowired ApplicationContext applicationContext;
MongoTemplate mongoTemplate;
@Autowired
@SuppressWarnings("unchecked")
public void setMongo(Mongo mongo) throws Exception {
MongoMappingContext mappingContext = new MongoMappingContext();
mappingContext.setInitialEntitySet(new HashSet<Class<?>>(Arrays.asList(XObject.class)));
mappingContext.initialize();
DbRefResolver dbRefResolver = new DefaultDbRefResolver(factory);
MappingMongoConverter mappingConverter = new MappingMongoConverter(dbRefResolver, mappingContext);
mappingConverter.afterPropertiesSet();
this.mongoTemplate = new MongoTemplate(factory, mappingConverter);
mongoTemplate.setApplicationContext(applicationContext);
}
@Before
public void setUp() {
cleanDb();
}
@After
public void cleanUp() {
cleanDb();
}
protected void cleanDb() {
mongoTemplate.dropCollection(mongoTemplate.getCollectionName(XObject.class));
mongoTemplate.dropCollection("group_test_collection");
}
@Test
public void singleKeyCreation() {
DBObject gc = new GroupBy("a").getGroupByObject();
assertThat(gc.toString(), is("{ \"key\" : { \"a\" : 1} , \"$reduce\" : null , \"initial\" : null }"));
}
@Test
public void multipleKeyCreation() {
DBObject gc = GroupBy.key("a", "b").getGroupByObject();
assertThat(gc.toString(), is("{ \"key\" : { \"a\" : 1 , \"b\" : 1} , \"$reduce\" : null , \"initial\" : null }"));
}
@Test
public void keyFunctionCreation() {
DBObject gc = GroupBy.keyFunction("classpath:keyFunction.js").getGroupByObject();
assertThat(gc.toString(),
is("{ \"$keyf\" : \"classpath:keyFunction.js\" , \"$reduce\" : null , \"initial\" : null }"));
}
@Test
public void SimpleGroup() {
createGroupByData();
GroupByResults<XObject> results = mongoTemplate.group(
"group_test_collection",
GroupBy.key("x").initialDocument(new BasicDBObject("count", 0))
.reduceFunction("function(doc, prev) { prev.count += 1 }"), XObject.class);
assertMapReduceResults(results);
}
@Test
public void SimpleGroupWithKeyFunction() {
createGroupByData();
GroupByResults<XObject> results = mongoTemplate.group(
"group_test_collection",
GroupBy.keyFunction("function(doc) { return { x : doc.x }; }").initialDocument("{ count: 0 }")
.reduceFunction("function(doc, prev) { prev.count += 1 }"), XObject.class);
assertMapReduceResults(results);
}
@Test
public void SimpleGroupWithFunctionsAsResources() {
createGroupByData();
GroupByResults<XObject> results = mongoTemplate.group(
"group_test_collection",
GroupBy.keyFunction("classpath:keyFunction.js").initialDocument("{ count: 0 }")
.reduceFunction("classpath:groupReduce.js"), XObject.class);
assertMapReduceResults(results);
}
@Test
public void SimpleGroupWithQueryAndFunctionsAsResources() {
createGroupByData();
GroupByResults<XObject> results = mongoTemplate.group(
where("x").gt(0),
"group_test_collection",
keyFunction("classpath:keyFunction.js").initialDocument("{ count: 0 }").reduceFunction(
"classpath:groupReduce.js"), XObject.class);
assertMapReduceResults(results);
}
private void assertMapReduceResults(GroupByResults<XObject> results) {
DBObject dboRawResults = results.getRawResults();
assertThat(dboRawResults.containsField("serverUsed"), is(true));
assertThat(dboRawResults.get("serverUsed").toString(), endsWith("127.0.0.1:27017"));
int numResults = 0;
for (XObject xObject : results) {
if (xObject.getX() == 1) {
Assert.assertEquals(2, xObject.getCount(), 0.001);
}
if (xObject.getX() == 2) {
Assert.assertEquals(1, xObject.getCount(), 0.001);
}
if (xObject.getX() == 3) {
Assert.assertEquals(3, xObject.getCount(), 0.001);
}
numResults++;
}
assertThat(numResults, is(3));
assertThat(results.getKeys(), is(3));
assertEquals(6, results.getCount(), 0.001);
}
private void createGroupByData() {
DBCollection c = mongoTemplate.getDb().getCollection("group_test_collection");
c.save(new BasicDBObject("x", 1));
c.save(new BasicDBObject("x", 1));
c.save(new BasicDBObject("x", 2));
c.save(new BasicDBObject("x", 3));
c.save(new BasicDBObject("x", 3));
c.save(new BasicDBObject("x", 3));
}
}