Package org.apache.solr.response

Interface QueryResponseWriter

All Superinterfaces:

NamedListInitializedPlugin

All Known Subinterfaces:

BinaryQueryResponseWriter

All Known Implementing Classes:

BinaryResponseWriter, CborResponseWriter, CSVResponseWriter, GeoJSONResponseWriter, GraphMLResponseWriter, JacksonJsonWriter, JSONResponseWriter, PHPResponseWriter, PHPSerializedResponseWriter, PrometheusResponseWriter, PythonResponseWriter, RawResponseWriter, RubyResponseWriter, SchemaXmlResponseWriter, SmileResponseWriter, XMLResponseWriter

public interface QueryResponseWriter
extends NamedListInitializedPlugin

Implementations of QueryResponseWriter are used to format responses to query requests.

Different QueryResponseWriters are registered with the SolrCore. One way to register a QueryResponseWriter with the core is through the solrconfig.xml file.

Example solrconfig.xml entry to register a QueryResponseWriter implementation to handle all queries with a writer type of "simple":

<queryResponseWriter name="simple" class="foo.SimpleResponseWriter" />

A single instance of any registered QueryResponseWriter is created via the default constructor and is reused for all relevant queries.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	CONTENT_TYPE_TEXT_ASCII
static final String	CONTENT_TYPE_TEXT_UTF8
static final String	CONTENT_TYPE_XML_UTF8

Method Summary

Modifier and Type	Method	Description
String	getContentType(SolrQueryRequest request, SolrQueryResponse response)	Return the applicable Content Type for a request, this method must be thread safe.
void	write(Writer writer, SolrQueryRequest request, SolrQueryResponse response)	Write a SolrQueryResponse, this method must be thread save.

Methods inherited from interface org.apache.solr.util.plugin.NamedListInitializedPlugin

init

Field Details

CONTENT_TYPE_XML_UTF8

static final String CONTENT_TYPE_XML_UTF8

See Also:

• Constant Field Values

CONTENT_TYPE_TEXT_UTF8

static final String CONTENT_TYPE_TEXT_UTF8

See Also:

• Constant Field Values

CONTENT_TYPE_TEXT_ASCII

static final String CONTENT_TYPE_TEXT_ASCII

See Also:

• Constant Field Values

Method Details

write

void write(Writer writer,
 SolrQueryRequest request,
 SolrQueryResponse response)
    throws IOException

Write a SolrQueryResponse, this method must be thread save.

Information about the request (in particular: formatting options) may be obtained from req but the dominant source of information should be rsp.

There are no mandatory actions that write must perform. An empty write implementation would fulfill all interface obligations.

Throws:

IOException

getContentType

String getContentType(SolrQueryRequest request,
 SolrQueryResponse response)

Return the applicable Content Type for a request, this method must be thread safe.

QueryResponseWriter's must implement this method to return a valid HTTP Content-Type header for the request, that will logically correspond with the output produced by the write method.

Returns:

a Content-Type string, which may not be null.