@Test
public void testIssue260() {
createContentAndVersionData();
String map = "function () { emit(this.document_id, this.version); }";
String reduce = "function (key, values) { return Math.max.apply(Math, values); }";
MapReduceResults<ContentAndVersion> results =
mongoTemplate.mapReduce(
"jmr2",
map,
reduce,
new MapReduceOptions().outputCollection("jmr2_out"),
ContentAndVersion.class);
int size = 0;
for (ContentAndVersion cv : results) {
if (cv.getId().equals("Resume")) {
assertEquals(6, cv.getValue().longValue());
}
if (cv.getId().equals("Schema")) {
assertEquals(2, cv.getValue().longValue());
}
if (cv.getId().equals("mongoDB How-To")) {
assertEquals(2, cv.getValue().longValue());
}
size++;
}
assertEquals(3, size);
}
private void createContentAndVersionData() {
/*
{ "_id" : 1, "document_id" : "mongoDB How-To", "author" : "Amos King", "content" : "...", "version" : 1 }
{ "_id" : 2, "document_id" : "mongoDB How-To", "author" : "Amos King", "content" : "...", "version" : 1.1 }
{ "_id" : 3, "document_id" : "Resume", "author" : "Author", "content" : "...", "version" : 6 }
{ "_id" : 4, "document_id" : "Schema", "author" : "Someone Else", "content" : "...", "version" : 0.9 }
{ "_id" : 5, "document_id" : "Schema", "author" : "Someone Else", "content" : "...", "version" : 1 }
*/
ContentAndVersion cv1 = new ContentAndVersion();
cv1.setDocumentId("mongoDB How-To");
cv1.setAuthor("Amos King");
cv1.setContent("...");
cv1.setVersion(1L);
template.save(cv1, "jmr2");
ContentAndVersion cv2 = new ContentAndVersion();
cv2.setDocumentId("mongoDB How-To");
cv2.setAuthor("Amos King");
cv2.setContent("...");
cv2.setVersion(2L);
template.save(cv2, "jmr2");
ContentAndVersion cv3 = new ContentAndVersion();
cv3.setDocumentId("Resume");
cv3.setAuthor("Author");
cv3.setContent("...");
cv3.setVersion(6L);
template.save(cv3, "jmr2");
ContentAndVersion cv4 = new ContentAndVersion();
cv4.setDocumentId("Schema");
cv4.setAuthor("Someone Else");
cv4.setContent("...");
cv4.setVersion(1L);
template.save(cv4, "jmr2");
ContentAndVersion cv5 = new ContentAndVersion();
cv5.setDocumentId("Schema");
cv5.setAuthor("Someone Else");
cv5.setContent("...");
cv5.setVersion(2L);
template.save(cv5, "jmr2");
}
