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Get Mappings API

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Get Mappings API

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Get Mappings Request

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A GetMappingsRequest can have an optional list of indices and optional list of types:

GetMappingsRequest request = new GetMappingsRequest(); 
request.indices("twitter"); 
request.types("_doc");

	An empty request that will return all indices and types
	Setting the indices to fetch mapping for
	The types to be returned

Optional arguments

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The following arguments can also optionally be provided:

request.masterNodeTimeout(TimeValue.timeValueMinutes(1)); 
request.masterNodeTimeout("1m");

	Timeout to connect to the master node as a `TimeValue`
	Timeout to connect to the master node as a `String`

request.indicesOptions(IndicesOptions.lenientExpandOpen());

Options for expanding indices names

Synchronous Execution

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GetMappingsResponse getMappingResponse = client.indices().getMapping(request, RequestOptions.DEFAULT);

Asynchronous Execution

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The asynchronous execution of a get mappings request requires both the GetMappingsRequest instance and an ActionListener instance to be passed to the asynchronous method:

client.indices().getMappingAsync(request, RequestOptions.DEFAULT, listener);

The GetMappingsRequest to execute and the ActionListener to use when the execution completes

The asynchronous method does not block and returns immediately. Once it is completed the ActionListener is called back using the onResponse method if the execution successfully completed or using the onFailure method if it failed.

A typical listener for GetMappingsResponse looks like:

ActionListener<GetMappingsResponse> listener =
    new ActionListener<GetMappingsResponse>() {
        @Override
        public void onResponse(GetMappingsResponse putMappingResponse) {
            
        }

        @Override
        public void onFailure(Exception e) {
            
        }
    };

	Called when the execution is successfully completed. The response is provided as an argument
	Called in case of failure. The raised exception is provided as an argument

Get Mappings Response

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The returned GetMappingsResponse allows to retrieve information about the executed operation as follows:

ImmutableOpenMap<String, ImmutableOpenMap<String, MappingMetaData>> allMappings = getMappingResponse.mappings(); 
MappingMetaData typeMapping = allMappings.get("twitter").get("_doc"); 
Map<String, Object> mapping = typeMapping.sourceAsMap();

	Returning all indices' mappings
	Retrieving the mappings for a particular index and type
	Getting the mappings as a Java Map

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