Apache Solr Reference Guide Covering Apache Solr 6.0

would allow regular downloading of currency data. See Exchange Rates below for more.
At indexing time, money fields can be indexed in a native currency. For example, if a product on an e-commerce
site is listed in Euros, indexing the price field as "1000,EUR" will index it appropriately. The price should be
separated from the currency by a comma, and the price must be encoded with a floating point value (a decimal
point).
During query processing, range and point queries are both supported.
Exchange Rates
You configure exchange rates by specifying a provider. Natively, two provider types are supported: FileExchan
geRateProvider or OpenExchangeRatesOrgProvider.
FileExchangeRateProvider
This provider requires you to provide a file of exchange rates. It is the default, meaning that to use this provider
you only need to specify the file path and name as a value for currencyConfig in the definition for this type.
There is a sample currency.xml file included with Solr, found in the same directory as the schema.xml file.
Here is a small snippet from this file:
OpenExchangeRatesOrgProvider
You can configure Solr to download exchange rates from OpenExchangeRates.Org, with updates rates between
USD and 170 currencies hourly. These rates are symmetrical only.
In this case, you need to specify the providerClass in the definitions for the field type and sign up for an API
key. Here is an example:
The refreshInterval is minutes, so the above example will download the newest rates every 60 minutes.
The refresh interval may be increased, but not decreased.
Apache Solr Reference Guide 6.0
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