The query compilation cache is a Map used to
cache parsed query strings. As a result, most queries are
only parsed once in Kodo, and cached thereafter. You can control the
compilation cache through the
kodo.QueryCompilationCache configuration property.
This property accepts a plugin string (see
Section 2.5, “Plugin Configuration”) describing the
Map used to associate query strings and their
parsed form. This property accepts the following aliases:
Table 10.2. Pre-defined aliases
| Alias | Value | Notes |
|---|---|---|
true
|
kodo.util.CacheMap
|
The default option. Uses a
CacheMap to store
compilation data. CacheMap uses
a least-recently-used strategy for a fixed number
of cache entries, and an optional soft reference
map for entries that are moved out of the LRU
space. So, for applications that have a
monotonically increasing number of distinct queries,
this option can be used to ensure that a fixed
amount of memory is used by the cache.
|
all |
java.util.HashMap
| This is the fastest option, but compilation data is never dropped from the cache, so if you use a large number of dynamic queries, this option may result in ever-increasing memory usage. Note that if your queries only differ in the values of the parameters, this should not be an issue. |
false | none | Disables the compilation cache. |