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Within the constructor block we then initialized our Elasticsearch client by passing in the host address. The next block of code pings our cluster to make sure we are in connection and the ping function returns a promise, which is been handled by our catch block. In the case of a failed connection a HttpException…

Some of the methods like a bulk , update have invoked from Elasticsearch. In the notion of abstraction, we could use an interface to let search service using the reference to the interface with method calls. This could be similar to the other implementation in the application. We can have a look at figure 2.1…