Implements com.google.common.cache.LoadingCache.apply.

Doc from java.util.function.Function.apply.

Applies this function to the given argument.

Parameters

key:K

the function argument

Returns:V

the function result

Annotations

@Override

Implements com.google.common.cache.LoadingCache.get.

Doc from com.google.common.cache.LoadingCache.get.

Returns the value associated with key in this cache, first loading that value if necessary. No observable state associated with this cache is modified until loading completes.

If another call to get or getUnchecked is currently loading the value for key, simply waits for that thread to finish and returns its loaded value. Note that multiple threads can concurrently load values for distinct keys.

Caches loaded by a CacheLoader will call CacheLoader#load to load new values into the cache. Newly loaded values are added to the cache using Cache.asMap().putIfAbsent after loading has completed; if another value was associated with key while the new value was loading then a removal notification will be sent for the new value.

If the cache loader associated with this cache is known not to throw checked exceptions, then prefer getUnchecked over this method.

Annotations

@CanIgnoreReturnValue

@Override

Exceptions

ExecutionException:

if a checked exception was thrown while loading the value. (ExecutionException is thrown even if computation was interrupted by an InterruptedException.)

Implements com.google.common.cache.LoadingCache.getAll.

Doc from com.google.common.cache.LoadingCache.getAll.

Returns a map of the values associated with keys, creating or retrieving those values if necessary. The returned map contains entries that were already cached, combined with newly loaded entries; it will never contain null keys or values.

Caches loaded by a CacheLoader will issue a single request to CacheLoader#loadAll for all keys which are not already present in the cache. All entries returned by CacheLoader#loadAll will be stored in the cache, over-writing any previously cached values. This method will throw an exception if CacheLoader#loadAll returns null, returns a map containing null keys or values, or fails to return an entry for each requested key.

Note that duplicate elements in keys, as determined by Object#equals, will be ignored.

Annotations

@CanIgnoreReturnValue

@Override

Exceptions

ExecutionException:

if a checked exception was thrown while loading the value. (ExecutionException is thrown even if computation was interrupted by an InterruptedException.)

Implements com.google.common.cache.LoadingCache.getUnchecked.

Doc from com.google.common.cache.LoadingCache.getUnchecked.

Returns the value associated with key in this cache, first loading that value if necessary. No observable state associated with this cache is modified until loading completes. Unlike get, this method does not throw a checked exception, and thus should only be used in situations where checked exceptions are not thrown by the cache loader.

If another call to get or getUnchecked is currently loading the value for key, simply waits for that thread to finish and returns its loaded value. Note that multiple threads can concurrently load values for distinct keys.

Caches loaded by a CacheLoader will call CacheLoader#load to load new values into the cache. Newly loaded values are added to the cache using Cache.asMap().putIfAbsent after loading has completed; if another value was associated with key while the new value was loading then a removal notification will be sent for the new value.

Annotations

@CanIgnoreReturnValue

@Override

Implements com.google.common.cache.LoadingCache.refresh.

Doc from com.google.common.cache.LoadingCache.refresh.

Loads a new value for key, possibly asynchronously. While the new value is loading the previous value (if any) will continue to be returned by get(key) unless it is evicted. If the new value is loaded successfully it will replace the previous value in the cache; if an exception is thrown while refreshing the previous value will remain, and the exception will be logged (using java.util.logging.Logger) and swallowed.

Caches loaded by a CacheLoader will call CacheLoader#reload if the cache currently contains a value for key, and CacheLoader#load otherwise. Loading is asynchronous only if CacheLoader#reload was overridden with an asynchronous implementation.

Returns without doing anything if another thread is currently loading the value for key. If the cache loader associated with this cache performs refresh asynchronously then this method may return before refresh completes.

Annotations

@Override