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Please help me write a Java Criteria-object query to find all items with collections that have all desired members. Basically, I need to "and" the condition, not "or" it. This is exactly like SO articles and tags: search for articles with tags "java" and "hibernate", the result should only have articles tagged with both tags (more tags are ok). Like this one :)

My entity is called "Solution" and it has a collection of tag entities mapped via a two-column mapping table. I understand from research below that I need a DetachedQuery. The critical routine (see search service impl below) runs but returns no results in the test case.

Research so far - if I knew how to translate HQL to Criteria better I would be farther ahead :/

1. Exact same question as mine, @Firo offers Criteria code but it has a slight problem: Hibernate Criteria to match against all child collection
2. HQL code only: Matching *ALL* items in a list with Hibernate criteria
3. HQL code only: Hibernate: Select entities where collection contains all of the specified valus
4. Discussion and HQL: https://vladmihalcea.com/sql-query-parent-rows-all-children-match-filtering-criteria
5. Nice writeup of HQL: http://www.sergiy.ca/how-to-write-many-to-many-search-queries-in-mysql-and-hibernate

EDIT Thanks to @samabcde I corrected the query method to use Restrictions.eqProperty, no more class cast exception.

By turning on debug logging I can see this generated SQL (long because of the eager fetch policy). It doesn't look right, especially the "this_.ID=this_.ID" part - this is trivially true.

On a computer, 2 ubuntu virtual machines are installed. On one of them there is another virtual machine with Fiware-orion Context broker. Both VMs have ROS.

I am trying to make a simple publisher-subscriber ROS program, that sends a message from one VM to another one through FIROS(firos is installed and configured). The problem is that the message from a publishing VM is being sent to FIROS(or it is better to say, the topic is shared through FIROS), but somehow it is not being achieved by the subscribing VM, and therefore I cannot see the message being sent.

We are using the local network so there shouldn't be an issue with port forwarding. Moreover, using rostopic list it is visible that it has fiwaretopics on both VMs running. Can it be, that the issue lies in using Virtual Machines rather than 2 separate PCs? Thank you in advance.