Hi Stephen, Thanks a lot for your prompt response. Your response is helpful.
To implement my usecase, it seems I need to leverage MULTISET which stores objects and its count in Map. In my case key can be the object and value can be the count. Thanks, Anil. From: Stefan Kupstaitis-Dunkler [mailto:[email protected]] Sent: Friday, January 4, 2019 5:21 PM To: [email protected] Cc: Christopher Berry <[email protected]>; Satish Abburi <[email protected]> Subject: Re: MAP Data structure in Stellar to store key/value pairs Hi Anil, the easiest way to define a map in the Stellar language is to define it via a variable assignment in a JSON format. * For example, below I define a map called kafka_props. * Then, with "MAP_EXISTS" I check if the map ( => JSON object) has a key "security.protocol", which it has * Then I try to extract the value of the key "security.protocol" and get the correct value of "SASL_PLAINTEXT". [Stellar]>>> kafka_props := { "bootstrap.servers": "condla1.field.hortonworks.com:6667<https://linkprotect.cudasvc.com/url?a=http%3a%2f%2fcondla1.field.hortonworks.com%3a6667&c=E,1,kV8zHoG2q0Nc914Rsy-CqiQUASnC2KJzdhnmzuiqedICznMjc594ym7qCUgieeJK9hxScFT7nW1mlpW8bnZcL47sAxM1I0c5ovHgYYq4TjRgiQ,,&typo=1>", "security.protocol": "SASL_PLAINTEXT"} {security.protocol=SASL_PLAINTEXT, bootstrap.servers=condla1.field.hortonworks.com:6667<https://linkprotect.cudasvc.com/url?a=http%3a%2f%2fcondla1.field.hortonworks.com%3a6667&c=E,1,Hpt8rMt0s0AMdwKgpTaqWnGhED2yjszVCRAtBe9bJCmgX0C-gf7ogrPYAnwx5BnvmKhT84D3KdAVBpEziOENBptlQEOmXBw-wh54U-MpLGgK_HfaDR8,&typo=1>} [Stellar]>>> MAP_EXISTS("security.protocol", kafka_props) true [Stellar]>>> MAP_GET("security.protocol", kafka_props) SASL_PLAINTEXT As of now, I don't think there is a MAP_PUT . In most of the Metron use cases, the map is either the incoming message or an external enrichment and you use MAP_GET to extract information from it. Does this answer your question? Best, Stefan On Fri, Jan 4, 2019 at 12:26 PM Anil Donthireddy <[email protected]<mailto:[email protected]>> wrote: Hi, I have gone through the stellar documentation to understand how to store key/value pairs in to an stellar object. I can see there are functions MAP_EXISTS() and MAP_GET() that do operations on key/value pairs. But I am unable to find how to initialize MAP object and add/update key/value pairs in the MAP. Please help to store key/value pairs in stellar object. Thanks, Anil.
