How to use client api in java application

Datomic Pro
1

Hi, are there any examples/docs how to use api provided by com.datomic:client-pro library? There is enough information about com.datomic:datomic-pro but nothing about client version. Actually I would know the entry point, if peer library has datomic.Peer class as entry point where I can start to use datomic, but I do not find anything similar in the client library

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2

@jaret @stu Could anyone please provide or point me any simple example of usage datomic client pro library in java app?

3

Or it is supposed that client pro library provides clj files which should used by java app directly like in the next example:

RT.loadResourceScript("datomic/client/impl/pro.clj");
            RT.var("datomic.client.impl.pro", "create-client").invoke(PersistentHashMap.create(Map.of(
                    Keyword.intern("server-type"), Keyword.intern("peer-server"),
                    Keyword.intern("access-key"), "datomic",
                    Keyword.intern("secret"), "datomic",
                    Keyword.intern("endpoint"), "localhost:8998",
                    Keyword.intern("validate-hostnames"), false)))
4

Looks like I was able to achieve some success result

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If it is the right way of using client api in java app then I would ask about async api(since I’m interested in client api to be able to execute async queries) , I did small changes to the above example, but I’m getting an error:
“No implementation of method: :recent-db of protocol: #'datomic.client.impl.shared.protocols/Connection found for class: clojure.core.async.impl.channels.ManyToManyChannel”

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It happens when

var db = fnDb.invoke(connection);
because connection is clojure.core.async.impl.channels.ManyToManyChannel when the same example is run but for sync api then class of connection is datomic.client.impl.shared.Connection

5

I highly recommend to use library mentioned here Client api for Java/Scala published - #3 by jaret

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