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CAMEL-6507 - Add aggregat to mongo component #26

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CAMEL-6507 - Add aggregat to mongo component #26

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3 changes: 3 additions & 0 deletions ...ents/camel-mongodb/src/main/java/org/apache/camel/component/mongodb/MongoDbOperation.java
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,9 @@ public enum MongoDbOperation {
// delete operations
remove,

//aggregat
aggregat,

// others
getDbStats,
getColStats,
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44 changes: 43 additions & 1 deletion ...nents/camel-mongodb/src/main/java/org/apache/camel/component/mongodb/MongoDbProducer.java
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Expand Up @@ -19,7 +19,9 @@
import java.util.ArrayList;
import java.util.List;

import com.mongodb.AggregationOutput;
import com.mongodb.BasicDBObject;
import com.mongodb.BasicDBList;
import com.mongodb.CommandResult;
import com.mongodb.DB;
import com.mongodb.DBCollection;
Expand Down Expand Up @@ -113,7 +115,11 @@ protected void invokeOperation(MongoDbOperation operation, Exchange exchange) th
case remove:
doRemove(exchange);
break;


case aggregat:
doAggregat(exchange);
break;

case getDbStats:
doGetStats(exchange, MongoDbOperation.getDbStats);
break;
Expand Down Expand Up @@ -339,6 +345,42 @@ protected void doCount(Exchange exchange) throws Exception {
resultMessage.setBody(answer);
}

/**
* All headers except collection and database are non available for this
* operation.
*
* @param exchange
* @throws Exception
*/
protected void doAggregat(Exchange exchange) throws Exception {
DBCollection dbCol = calculateCollection(exchange);
DBObject query = exchange.getIn().getMandatoryBody(DBObject.class);

// Impossible with java driver to get the batch size and number to skip
Iterable<DBObject> dbIterator = null;
try {
AggregationOutput agregationResult = null;

//Allow body to be a pipeline
//@see http://docs.mongodb.org/manual/core/aggregation/
if(query instanceof BasicDBList){
BasicDBList queryList = (BasicDBList)query;
agregationResult = dbCol.aggregate((DBObject)queryList.get(0), (BasicDBObject[])queryList.subList(1, queryList.size()).toArray(new BasicDBObject[ queryList.size()-1]));
}else{
agregationResult = dbCol.aggregate(query);
}

dbIterator = agregationResult.results();
Message resultMessage = prepareResponseMessage(exchange,
MongoDbOperation.aggregat);
resultMessage.setBody(dbIterator);

//Mongo Driver does not allow to read size and to paginate agregate result
} catch (Exception e) {
// rethrow the exception
throw e;
}
}
// --------- Convenience methods -----------------------

private DBCollection calculateCollection(Exchange exchange) {
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20 changes: 20 additions & 0 deletions ...camel-mongodb/src/test/java/org/apache/camel/component/mongodb/MongoDbOperationsTest.java
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Expand Up @@ -17,12 +17,14 @@
package org.apache.camel.component.mongodb;

import java.util.Formatter;
import java.util.List;

import com.mongodb.BasicDBObject;
import com.mongodb.DBObject;
import com.mongodb.WriteResult;
import com.mongodb.util.JSON;

import org.apache.camel.Exchange;
import org.apache.camel.builder.RouteBuilder;

import org.junit.Test;
Expand Down Expand Up @@ -156,6 +158,23 @@ public void testRemove() throws Exception {

}

@Test
public void testAgregat() throws Exception {
// Test that the collection has 0 documents in it
assertEquals(0, testCollection.count());
pumpDataIntoTestCollection();

// Repeat ten times, obtain 10 batches of 100 results each time
Object result = template.requestBody("direct:aggregat",
"[{ $match : {$or : [{\"scientist\" : \"Darwin\"},{\"scientist\" : \"Einstein\"}]}},{ $group: { _id: \"$scientist\", count: { $sum: 1 }} } ]");
assertTrue("Result is not of type List", result instanceof List);

@SuppressWarnings("unchecked")
List<DBObject> resultList = (List<DBObject>) result;
assertListSize("Result does not contain 2 elements", resultList, 2);
//TODO Add more asserts
}

@Test
public void testDbStats() throws Exception {
assertEquals(0, testCollection.count());
Expand Down Expand Up @@ -210,6 +229,7 @@ public void configure() {
from("direct:save").to("mongodb:myDb?database={{mongodb.testDb}}&collection={{mongodb.testCollection}}&operation=save&writeConcern=SAFE");
from("direct:update").to("mongodb:myDb?database={{mongodb.testDb}}&collection={{mongodb.testCollection}}&operation=update&writeConcern=SAFE");
from("direct:remove").to("mongodb:myDb?database={{mongodb.testDb}}&collection={{mongodb.testCollection}}&operation=remove&writeConcern=SAFE");
from("direct:aggregat").to("mongodb:myDb?database={{mongodb.testDb}}&collection={{mongodb.testCollection}}&operation=aggregat&writeConcern=SAFE");
from("direct:getDbStats").to("mongodb:myDb?database={{mongodb.testDb}}&collection={{mongodb.testCollection}}&operation=getDbStats");
from("direct:getColStats").to("mongodb:myDb?database={{mongodb.testDb}}&collection={{mongodb.testCollection}}&operation=getColStats");

Expand Down