aggregation

I m new to Camel and wondering how I can implement below mentioned use case using Camel, We have a REST web service and lets say it has two service operations callA and callB. Now we have ESB layer in the front that intercepts the client requests before hitting this actual web service URLs. Now I m trying to do something like this - Expose a URL in ESB that client will actually call. In the ESB we are using Camel's Jetty component which just proxies this service call. So lets say this URL be /my-service/scan/ Now on receiving this request @ESB, I want to call these two REST endpoints (callA

With maven/tycho build for Nodeclipse Eclipse plugin there is new p2 repository every release. Release is done on Bintray that does not allow to update files. So every version goes in its folder. BaseFolder BaseFolder/VersionFolder1 BaseFolder/VersionFolder2 BaseFolder/VersionFolder3 Is it possible to have BaseFolder prepared once as extendable p2 repository, and VersionFolderN added later? So that there would be only one URL for updates and Eclipse platform could discover updates in the repository. What you are looking for is a composite p2 repository. You'll just need the following two files

I am facing a continuing problem distinguishing delegation, composition and aggregation from each other, and identifying the cases where it's the best to use one over the other. I have consulted a Java OO Analysis and Design book, but my confusion still remains. The main explanation is this: Delegation : When my object uses another object's functionality as is without changing it. Composition : My object consists of other objects which in turn cannot exist after my object is destroyed-garbage collected. Aggregation : My object consists of other objects which can live even after my object is

I'm trying to average data in SQL Server 2005 in a day. Here is what my database look like this if I use simple query as SELECT timestamp, FEED FROM ROASTER_FEED ORDER timestamp Data: timestamp Feed 02/07/2011 12:00:01 1246 02/07/2011 12:00:01 1234 02/07/2011 12:00:01 1387 02/07/2011 12:00:02 1425 02/07/2011 12:00:03 1263 ... 02/07/2011 11:00:01 1153 02/07/2011 11:00:01 1348 02/07/2011 11:00:01 1387 02/07/2011 11:00:02 1425 02/07/2011 11:00:03 1223 .... 03/07/2011 12:00:01 1226 03/07/2011 12:00:01 1245 03/07/2011 12:00:01 1384 03/07/2011 12:00:02 1225 03/07/2011 12:00:03 1363 I don't know how

I have a collection of ProductViews . ProductView { productId: '5b8c0f3204a10228b00a1745, createdAt: '2018-09-07T17:18:40.759Z', } And I have a query for fetching the daily views for a specific product. Query ProductView.aggregate([ { $match: { productId } }, { $project: { day: { $substr: ["$createdAt", 0, 10] } } }, { $group: { _id: "$day", count: { $sum: 1 }, time: { $avg: "$createdAt" }, } }, { $sort: { _id: 1 } }, { $project: { date: '$_id', views: '$count', }, }, ]).exec((err, result) => ...) Current Results [ { date: '2018-09-01', views: 1 }, { date: '2018-09-02', views: 3 }, { date:

I try to implement a Cumululative product in Spark scala but I really don't know how to it. I have the following dataframe: Input data: +--+--+--------+----+ |A |B | date | val| +--+--+--------+----+ |rr|gg|20171103| 2 | |hh|jj|20171103| 3 | |rr|gg|20171104| 4 | |hh|jj|20171104| 5 | |rr|gg|20171105| 6 | |hh|jj|20171105| 7 | +-------+------+----+ And I would like to have the following output Output data: +--+--+--------+-----+ |A |B | date | val | +--+--+--------+-----+ |rr|gg|20171105| 48 | // 2 * 4 * 6 |hh|jj|20171105| 105 | // 3 * 5 * 7 +-------+------+-----+ If you have any idea about how