Upgrade the java hotrod client to support remote querying --------------------------------------------------------- Key: ISPN-3175 URL: https://issues.jboss.org/browse/ISPN-3175 Project: Infinispan Issue Type: Feature Request Reporter: Mircea Markus Assignee: Mircea Markus Once we'll have ISPN-3169(define query fluent API), ISPN-3173(add a new query operation over hotrod) and ISPN-3174(String-based query language) in place, this is about connecting the dots: invoke the remote query on the server and present the result to the user. h3.On the client side As described in ISPN-3173, the query is sent as a byte[] to the server: the payload. The request payload is query specific (not defined in the HR protocol) and at this stage has the following format: [Q_TYPE] [QUERY_ST] [FIRST_INDEX] [PAGE_SIZE]. This format accommodates the remote query requirements as defined in ISPN-3169. - Q_TYPE (protobuf's byte) and query identifier, 1 for JPAQL (this is the query type we'll support). In future we'll add different query types as well. - QUERY_STRING (protobuf's string)- JPAQL string generated by the fluent API (ISPN-3169). Parameters are encoded in this string (vs being sent separately) - FIRST_INDEX + PAGE_SIZE (protobuf's int)- used for paginating/iterating over the result set. HR response: [HR_SUCESS_FLAG] [payload] PAYLOAD = [NUM_EL] [PROJ_SIZE] [ELEMENTS] - even though at this stage we don't support projections (see ISPN-3169) PROJ_SIZE is added for future compatibility when projection will be supported. Note that the payload for both request and response should be marshalled with protobuf as this information is read/written over multiple clients. h3.On the server side For an overview on the remote querying see https://community.jboss.org/wiki/QueryingDesignInInfinispan