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/*
* Copyright (c) 2000, 2020, Oracle and/or its affiliates.
*
* Licensed under the Universal Permissive License v 1.0 as shown at
* http://oss.oracle.com/licenses/upl.
*/
package com.tangosol.net;
import com.oracle.coherence.common.util.Options;
import com.tangosol.internal.util.processor.CacheProcessors;
import com.tangosol.net.cache.CacheMap;
import com.tangosol.util.AsynchronousAgent;
import com.tangosol.util.Filter;
import com.tangosol.util.ImmutableArrayList;
import com.tangosol.util.InvocableMap;
import com.tangosol.util.aggregator.Count;
import com.tangosol.util.comparator.EntryComparator;
import com.tangosol.util.comparator.SafeComparator;
import com.tangosol.util.filter.AlwaysFilter;
import com.tangosol.util.function.Remote;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import java.util.concurrent.CompletableFuture;
import java.util.function.BiConsumer;
import java.util.function.Consumer;
import java.util.function.IntSupplier;
/**
* Asynchronous {@link NamedCache}.
*
* @param the type of the cache entry keys
* @param the type of the cache entry values
*
* @author as 2015.01.17
* @since 12.2.1
*/
public interface AsyncNamedCache
{
/**
* Return the {@link NamedCache} instance this {@code AsyncNamedCache} is
* based on.
*
* @return the {@link NamedCache} instance this {@code AsyncNamedCache} is
* based on
*/
public NamedCache getNamedCache();
// ---- Asynchronous CacheMap methods -----------------------------------
/**
* Returns the value to which the specified key is mapped, or {@code null}
* if this map contains no mapping for the key.
*
* @param key the key whose associated value is to be returned
*
* @return a {@link CompletableFuture} for the value to which the specified
* key is mapped
*/
public default CompletableFuture get(K key)
{
return invoke(key, CacheProcessors.get());
}
/**
* Get all the specified keys, if they are in the cache. For each key that
* is in the cache, that key and its corresponding value will be placed in
* the map that is returned by this method. The absence of a key in the
* returned map indicates that it was not in the cache, which may imply (for
* caches that can load behind the scenes) that the requested data could not
* be loaded.
*
* @param colKeys a collection of keys that may be in the named cache
*
* @return a {@link CompletableFuture} for a Map of keys to values for the
* specified keys passed in colKeys
*/
public default CompletableFuture> getAll(Collection colKeys)
{
return invokeAll(colKeys, CacheProcessors.get());
}
/**
* Get all the entries that satisfy the specified filter. For each entry
* that satisfies the filter, the key and its corresponding value will be
* placed in the map that is returned by this method.
*
* @param filter a Filter that determines the set of entries to return
*
* @return a {@link CompletableFuture} for a Map of keys to values for the
* specified filter
*/
public default CompletableFuture> getAll(Filter filter)
{
return invokeAll(filter, CacheProcessors.get());
}
/**
* Stream the entries associated with the specified keys to the provided
* callback.
*
* @param colKeys a collection of keys that may be in the named cache
* @param callback a consumer of results as they become available
*
* @return a {@link CompletableFuture} that can be used to determine whether
* the operation completed
*/
public default CompletableFuture getAll(Collection colKeys,
BiConsumer callback)
{
return invokeAll(colKeys, CacheProcessors.get(),
entry -> callback.accept(entry.getKey(), entry.getValue()));
}
/**
* Stream the entries associated with the specified keys to the provided
* callback.
*
* @param colKeys a collection of keys that may be in the named cache
* @param callback a consumer of results as they become available
*
* @return a {@link CompletableFuture} that can be used to determine whether
* the operation completed
*/
public default CompletableFuture getAll(Collection colKeys,
Consumer> callback)
{
return invokeAll(colKeys, CacheProcessors.get(), callback);
}
/**
* Associates the specified value with the specified key in this cache. If
* the cache previously contained a mapping for this key, the old value is
* replaced.
*
* Invoking this method is equivalent to the following call:
*
* put(oKey, oValue, CacheMap.EXPIRY_DEFAULT);
*
*
* @param key key with which the specified value is to be associated
* @param value value to be associated with the specified key
*
* @return a {@link CompletableFuture}
*/
public default CompletableFuture put(K key, V value)
{
return put(key, value, CacheMap.EXPIRY_DEFAULT);
}
/**
* Associates the specified value with the specified key in this cache. If
* the cache previously contained a mapping for this key, the old value is
* replaced. This variation of the {@link #put(Object oKey, Object oValue)}
* method allows the caller to specify an expiry (or "time to live") for the
* cache entry.
*
* @param key key with which the specified value is to be associated
* @param value value to be associated with the specified key
* @param cMillis the number of milliseconds until the cache entry will
* expire, also referred to as the entry's "time to live";
* pass {@link CacheMap#EXPIRY_DEFAULT} to use the cache's
* default time-to-live setting; pass {@link
* CacheMap#EXPIRY_NEVER} to indicate that the cache entry
* should never expire; this milliseconds value is not
* a date/time value, such as is returned from
* System.currentTimeMillis()
*
* @return a {@link CompletableFuture}
*/
public default CompletableFuture put(K key, V value, long cMillis)
{
return invoke(key, CacheProcessors.put(value, cMillis));
}
/**
* Copies all of the mappings from the specified map to this map.
*
* @param map mappings to be added to this map
*
* @return a {@link CompletableFuture}
*/
public default CompletableFuture putAll(Map map)
{
return invokeAll(map.keySet(), CacheProcessors.putAll(map)).thenAccept(nil -> {});
}
/**
* Removes the mapping for a key from this map if it is present.
*
* @param key key whose mapping is to be removed from the map
*
* @return a {@link CompletableFuture} for the previous value associated
* with the key
*/
public default CompletableFuture remove(K key)
{
return invoke(key, CacheProcessors.remove());
}
/**
* Removes all of the mappings from the specified keys from this map, if
* they are present in the cache.
*
* @param colKeys a collection of keys that may be in the named cache
*
* @return a {@link CompletableFuture}
*/
public default CompletableFuture removeAll(Collection colKeys)
{
return invokeAll(colKeys, CacheProcessors.removeBlind()).thenAccept(ANY);
}
/**
* Removes all of the mappings that satisfy the specified filter from this map.
*
* @param filter a Filter that determines the set of entries to remove
*
* @return a {@link CompletableFuture}
*/
public default CompletableFuture removeAll(Filter filter)
{
return invokeAll(filter, CacheProcessors.removeBlind()).thenAccept(ANY);
}
// ---- Asynchronous QueryMap methods -----------------------------------
/**
* Return a set view of all the keys contained in this map.
*
* @return a complete set of keys for this map
*/
public default CompletableFuture> keySet()
{
return keySet(AlwaysFilter.INSTANCE);
}
/**
* Return a set view of the keys contained in this map for entries that
* satisfy the criteria expressed by the filter.
*
* @param filter the Filter object representing the criteria that the
* entries of this map should satisfy
*
* @return a set of keys for entries that satisfy the specified criteria
*/
public default CompletableFuture> keySet(Filter filter)
{
return invokeAll(filter, CacheProcessors.nop())
.thenApply(Map::keySet);
}
/**
* Stream the keys of all the entries contained in this map to the provided
* callback.
*
* @param callback a consumer of results as they become available
*
* @return a {@link CompletableFuture} that can be used to determine whether
* the operation completed
*/
public default CompletableFuture keySet(Consumer callback)
{
return keySet(AlwaysFilter.INSTANCE, callback);
}
/**
* Stream the keys for the entries that satisfy the specified filter to the
* provided callback.
*
* @param filter the Filter object representing the criteria that the
* entries of this map should satisfy
* @param callback a consumer of results as they become available
*
* @return a {@link CompletableFuture} that can be used to determine whether
* the operation completed
*/
public default CompletableFuture keySet(Filter filter,
Consumer callback)
{
return invokeAll(filter, CacheProcessors.nop(),
entry -> callback.accept(entry.getKey()));
}
/**
* Return a set view of all the entries contained in this map. Each element
* in the returned set is a {@link java.util.Map.Entry}.
*
* @return a set of all entries in this map
*/
public default CompletableFuture>> entrySet()
{
return entrySet(AlwaysFilter.INSTANCE);
}
/**
* Return a set view of the entries contained in this map that satisfy the
* criteria expressed by the filter. Each element in the returned set is a
* {@link java.util.Map.Entry}.
*
* @param filter the Filter object representing the criteria that the
* entries of this map should satisfy
*
* @return a set of entries that satisfy the specified criteria
*/
public default CompletableFuture>> entrySet(Filter filter)
{
return invokeAll(filter, CacheProcessors.get())
.thenApply(Map::entrySet);
}
/**
* Return a set view of the entries contained in this map that satisfy the
* criteria expressed by the filter. Each element in the returned set is a
* {@link java.util.Map.Entry}. It is further guaranteed that its iterator
* will traverse the set in such a way that the entry values come up in
* ascending order, sorted by the specified Comparator or according to the
* natural ordering (see {@link Comparable}).
*
* @param filter the Filter object representing the criteria that the
* entries of this map should satisfy
* @param comparator the Comparator object which imposes an ordering on
* entries in the resulting set; or null if the
* entries' values natural ordering should be used
*
* @return a set of entries that satisfy the specified criteria
*/
public default CompletableFuture>> entrySet(Filter filter, Comparator comparator)
{
return invokeAll(filter, CacheProcessors.get())
.thenApply(mapResult ->
{
int cEntries = mapResult.size();
Map.Entry[] aEntries = mapResult.entrySet().toArray(new Map.Entry[cEntries]);
Arrays.sort(aEntries, new EntryComparator(
comparator == null ? SafeComparator.INSTANCE : comparator));
return new ImmutableArrayList(aEntries, 0, cEntries).getSet();
});
}
/**
* Stream all the entries contained in this map to the provided callback.
*
* @param callback a consumer of results as they become available
*
* @return a {@link CompletableFuture} that can be used to determine whether
* the operation completed
*/
public default CompletableFuture entrySet(BiConsumer callback)
{
return entrySet(AlwaysFilter.INSTANCE, callback);
}
/**
* Stream all the entries contained in this map to the provided callback.
*
* @param callback a consumer of results as they become available
*
* @return a {@link CompletableFuture} that can be used to determine whether
* the operation completed
*/
public default CompletableFuture entrySet(Consumer> callback)
{
return entrySet(AlwaysFilter.INSTANCE, callback);
}
/**
* Stream the entries that satisfy the specified filter to the provided
* callback.
*
* @param filter the Filter object representing the criteria that the
* entries of this map should satisfy
* @param callback a consumer of results as they become available
*
* @return a {@link CompletableFuture} that can be used to determine whether
* the operation completed
*/
public default CompletableFuture entrySet(Filter filter, BiConsumer callback)
{
return invokeAll(filter, CacheProcessors.get(),
entry -> callback.accept(entry.getKey(), entry.getValue()));
}
/**
* Stream the entries that satisfy the specified filter to the provided
* callback.
*
* @param filter the Filter object representing the criteria that the
* entries of this map should satisfy
* @param callback a consumer of results as they become available
*
* @return a {@link CompletableFuture} that can be used to determine whether
* the operation completed
*/
public default CompletableFuture entrySet(Filter filter,
Consumer> callback)
{
return invokeAll(filter, CacheProcessors.get(), callback);
}
/**
* Return a collection of all the values contained in this map.
*
* @return a collection of all the values in this map
*/
public default CompletableFuture> values()
{
return values(AlwaysFilter.INSTANCE);
}
/**
* Return a collection of the values contained in this map that satisfy the
* criteria expressed by the filter.
*
* @param filter the Filter object representing the criteria that the
* entries of this map should satisfy
*
* @return a collection of values for entries that satisfy the specified
* criteria
*/
public default CompletableFuture> values(Filter filter)
{
return invokeAll(filter, CacheProcessors.get())
.thenApply(Map::values);
}
/**
* Return a collection of the values contained in this map that satisfy the
* criteria expressed by the filter.
*
* @param filter the Filter object representing the criteria that the
* entries of this map should satisfy
* @param comparator the Comparator object which imposes an ordering on
* entries in the resulting set; or null if the
* entries' values natural ordering should be used
*
* @return a collection of values for entries that satisfy the specified
* criteria
*/
public default CompletableFuture> values(Filter filter, Comparator comparator)
{
return values(filter)
.thenApply(colValues ->
{
List values = new ArrayList<>(colValues);
values.sort(comparator);
return values;
});
}
/**
* Stream the values of all the entries contained in this map to the provided
* callback.
*
* @param callback a consumer of results as they become available
*
* @return a {@link CompletableFuture} that can be used to determine whether
* the operation completed
*/
public default CompletableFuture values(Consumer callback)
{
return values(AlwaysFilter.INSTANCE, callback);
}
/**
* Stream the values for the entries that satisfy the specified filter to the
* provided callback.
*
* @param filter the Filter object representing the criteria that the
* entries of this map should satisfy
* @param callback a consumer of results as they become available
*
* @return a {@link CompletableFuture} that can be used to determine whether
* the operation completed
*/
public default CompletableFuture values(Filter filter, Consumer callback)
{
return invokeAll(filter, CacheProcessors.get(),
entry -> callback.accept(entry.getValue()));
}
// ---- Asynchronous InvocableMap methods -------------------------------
/**
* Invoke the passed EntryProcessor against the Entry specified by the
* passed key asynchronously, returning a {@link CompletableFuture} that can
* be used to obtain the result of the invocation.
*
* @param the type of value returned by the EntryProcessor
* @param key the key to process; it is not required to exist within
* the Map
* @param processor the EntryProcessor to use to process the specified key
*
* @return a {@link CompletableFuture} that can be used to obtain the result
* of the invocation
*/
public CompletableFuture invoke(K key, InvocableMap.EntryProcessor processor);
/**
* Invoke the passed EntryProcessor against all the entries asynchronously,
* returning a {@link CompletableFuture} that can be used to obtain the
* result of the invocation for each entry.
*
* @param the type of value returned by the EntryProcessor
* @param processor the EntryProcessor to use to process the specified keys
*
* @return a {@link CompletableFuture} that can be used to obtain the result
* of the invocation for each entry
*/
public default CompletableFuture> invokeAll(InvocableMap.EntryProcessor processor)
{
return invokeAll(AlwaysFilter.INSTANCE, processor);
}
/**
* Invoke the passed EntryProcessor against the entries specified by the
* passed keys asynchronously, returning a {@link CompletableFuture} that
* can be used to obtain the result of the invocation for each entry.
*
* @param the type of value returned by the EntryProcessor
* @param collKeys the keys to process; these keys are not required to
* exist within the Map
* @param processor the EntryProcessor to use to process the specified keys
*
* @return a {@link CompletableFuture} that can be used to obtain the result
* of the invocation for each entry
*/
public CompletableFuture> invokeAll(Collection collKeys,
InvocableMap.EntryProcessor processor);
/**
* Invoke the passed EntryProcessor against the set of entries that are
* selected by the given Filter asynchronously, returning a {@link
* CompletableFuture} that can be used to obtain the result of the
* invocation for each entry.
*
* @param the type of value returned by the EntryProcessor
* @param filter a Filter that results in the set of keys to be
* processed
* @param processor the EntryProcessor to use to process the specified keys
*
* @return a {@link CompletableFuture} that can be used to obtain the result
* of the invocation for each entry
*/
public CompletableFuture> invokeAll(Filter filter,
InvocableMap.EntryProcessor processor);
/**
* Invoke the passed EntryProcessor against all the entries asynchronously,
* returning a {@link CompletableFuture} that can be used to determine if
* the operation completed successfully.
*
* Instead of collecting and returning the complete result, this method
* will stream partial results of the processor execution to the specified
* partial result callback, which allows for a much lower memory overhead.
*
* @param the type of value returned by the EntryProcessor
* @param processor the EntryProcessor to use to process the specified keys
* @param callback a user-defined callback that will be called for each
* partial result
*
* @return a {@link CompletableFuture} that can be used to determine if the
* operation completed successfully
*/
public default CompletableFuture invokeAll(InvocableMap.EntryProcessor processor,
Consumer> callback)
{
return invokeAll(AlwaysFilter.INSTANCE, processor, callback);
}
/**
* Invoke the passed EntryProcessor against all the entries asynchronously,
* returning a {@link CompletableFuture} that can be used to determine if
* the operation completed successfully.
*
* Instead of collecting and returning the complete result, this method
* will stream partial results of the processor execution to the specified
* partial result callback, which allows for a much lower memory overhead.
*
* @param the type of value returned by the EntryProcessor
* @param processor the EntryProcessor to use to process the specified keys
* @param callback a user-defined callback that will be called for each
* partial result
*
* @return a {@link CompletableFuture} that can be used to determine if the
* operation completed successfully
*/
public default CompletableFuture invokeAll(InvocableMap.EntryProcessor processor,
BiConsumer callback)
{
return invokeAll(AlwaysFilter.INSTANCE, processor,
(entry -> callback.accept(entry.getKey(), entry.getValue())));
}
/**
* Invoke the passed EntryProcessor against the entries specified by the
* passed keys asynchronously, returning a {@link CompletableFuture} that
* can be used to determine if the operation completed successfully.
*
* Instead of collecting and returning the complete result, this method
* will stream partial results of the processor execution to the specified
* partial result callback, which allows for a much lower memory overhead.
*
* @param the type of value returned by the EntryProcessor
* @param collKeys the keys to process; these keys are not required to
* exist within the Map
* @param processor the EntryProcessor to use to process the specified keys
* @param callback a user-defined callback that will be called for each
* partial result
*
* @return a {@link CompletableFuture} that can be used to determine if the
* operation completed successfully
*/
public CompletableFuture invokeAll(Collection collKeys,
InvocableMap.EntryProcessor processor,
Consumer> callback);
/**
* Invoke the passed EntryProcessor against the entries specified by the
* passed keys asynchronously, returning a {@link CompletableFuture} that
* can be used to determine if the operation completed successfully.
*
* Instead of collecting and returning the complete result, this method
* will stream partial results of the processor execution to the specified
* partial result callback, which allows for a much lower memory overhead.
*
* @param the type of value returned by the EntryProcessor
* @param collKeys the keys to process; these keys are not required to
* exist within the Map
* @param processor the EntryProcessor to use to process the specified keys
* @param callback a user-defined callback that will be called for each
* partial result
*
* @return a {@link CompletableFuture} that can be used to determine if the
* operation completed successfully
*/
public default CompletableFuture invokeAll(Collection collKeys,
InvocableMap.EntryProcessor processor, BiConsumer callback)
{
return invokeAll(collKeys, processor,
entry -> callback.accept(entry.getKey(), entry.getValue()));
}
/**
* Invoke the passed EntryProcessor against the set of entries that are
* selected by the given Filter asynchronously, returning a {@link
* CompletableFuture} that can be used to determine if the operation
* completed successfully.
*
* Instead of collecting and returning the complete result, this method
* will stream partial results of the processor execution to the specified
* partial result callback, which allows for a much lower memory overhead.
*
* @param the type of value returned by the EntryProcessor
* @param filter a Filter that results in the set of keys to be
* processed
* @param processor the EntryProcessor to use to process the specified keys
* @param callback a user-defined callback that will be called for each
* partial result
*
* @return a {@link CompletableFuture} that can be used to determine if the
* operation completed successfully
*/
public CompletableFuture invokeAll(Filter filter,
InvocableMap.EntryProcessor processor,
Consumer> callback);
/**
* Invoke the passed EntryProcessor against the set of entries that are
* selected by the given Filter asynchronously, returning a {@link
* CompletableFuture} that can be used to determine if the operation
* completed successfully.
*
* Instead of collecting and returning the complete result, this method
* will stream partial results of the processor execution to the specified
* partial result callback, which allows for a much lower memory overhead.
*
* @param the type of value returned by the EntryProcessor
* @param filter a Filter that results in the set of keys to be
* processed
* @param processor the EntryProcessor to use to process the specified keys
* @param callback a user-defined callback that will be called for each
* partial result
*
* @return a {@link CompletableFuture} that can be used to determine if the
* operation completed successfully
*/
public default CompletableFuture invokeAll(Filter filter,
InvocableMap.EntryProcessor processor, BiConsumer callback)
{
return invokeAll(filter, processor,
entry -> callback.accept(entry.getKey(), entry.getValue()));
}
/**
* Perform an aggregating operation asynchronously against all the entries.
*
* @param the type of value returned by the EntryAggregator
* @param aggregator the EntryAggregator that is used to aggregate across
* the specified entries of this Map
*
* @return a {@link CompletableFuture} that can be used to obtain the result
* of the aggregation
*/
public default CompletableFuture aggregate(InvocableMap.EntryAggregator aggregator)
{
return aggregate(AlwaysFilter.INSTANCE, aggregator);
}
/**
* Perform an aggregating operation asynchronously against the entries
* specified by the passed keys.
*
* @param the type of value returned by the EntryAggregator
* @param collKeys the Collection of keys that specify the entries within
* this Map to aggregate across
* @param aggregator the EntryAggregator that is used to aggregate across
* the specified entries of this Map
*
* @return a {@link CompletableFuture} that can be used to obtain the result
* of the aggregation
*/
public CompletableFuture aggregate(Collection collKeys,
InvocableMap.EntryAggregator aggregator);
/**
* Perform an aggregating operation asynchronously against the set of
* entries that are selected by the given Filter.
*
* @param the type of value returned by the EntryAggregator
* @param filter the Filter that is used to select entries within this
* Map to aggregate across
* @param aggregator the EntryAggregator that is used to aggregate across
* the selected entries of this Map
*
* @return a {@link CompletableFuture} that can be used to obtain the result
* of the aggregation
*/
public CompletableFuture aggregate(Filter filter,
InvocableMap.EntryAggregator aggregator);
// ---- Asynchronous Map methods ----------------------------------------
/**
* Returns the number of key-value mappings in this cache. If the
* cache contains more than Integer.MAX_VALUE elements, returns
* Integer.MAX_VALUE.
*
* @return the number of key-value mappings in this cache
*/
default CompletableFuture size()
{
return aggregate(new Count<>());
}
/**
* Returns true if this cache contains no key-value mappings.
*
* @return true if this cache contains no key-value mappings
*/
default CompletableFuture isEmpty()
{
return size().thenApply(size -> size == 0);
}
/**
* Removes all of the mappings from this cache.
* The cache will be empty after this operation completes.
*/
default CompletableFuture clear()
{
return removeAll(AlwaysFilter.INSTANCE);
}
/**
* Returns true if this cache contains a mapping for the specified
* key. More formally, returns true if and only if
* this cache contains a mapping for a key k such that
* (key==null ? k==null : key.equals(k)). (There can be
* at most one such mapping.)
*
* @param key key whose presence in this cache is to be tested
*
* @return true if this cache contains a mapping for the specified
* key
*/
default CompletableFuture containsKey(K key)
{
return invoke(key, InvocableMap.Entry::isPresent);
}
/**
* Returns the value to which the specified key is mapped, or {@code
* valueDefault} if this map contains no mapping for the key.
*
* @param key the key whose associated value is to be returned
* @param valueDefault the default mapping of the key
*
* @return the value to which the specified key is mapped, or {@code
* valueDefault} if this map contains no mapping for the key
*/
@SuppressWarnings("unchecked")
public default CompletableFuture getOrDefault(K key, V valueDefault)
{
return invoke(key, entry ->
{
if (entry.isPresent())
{
return new Object[]{true, entry.getValue()};
}
return new Object[]{false};
})
.thenApply(aoResult ->
{
if (Boolean.TRUE.equals(aoResult[0]))
{
return (V) aoResult[1];
}
else
{
return valueDefault;
}
});
}
/**
* If the specified key is not already associated with a value (or is mapped
* to {@code null}) associates it with the given value and returns
* {@code null}, else returns the current value.
*
* @param key key with which the specified value is to be associated
* @param value value to be associated with the specified key
*
* @return the previous value associated with the specified key, or
* {@code null} if there was no mapping for the key.
* (A {@code null} return can also indicate that the map
* previously associated {@code null} with the key,
* if the implementation supports null values.)
*/
public default CompletableFuture putIfAbsent(K key, V value)
{
return invoke(key, CacheProcessors.putIfAbsent(value));
}
/**
* Removes the entry for the specified key only if it is currently
* mapped to the specified value.
*
* @param key key with which the specified value is associated
* @param value value expected to be associated with the specified key
*
* @return {@code true} if the value was removed
*/
public default CompletableFuture remove(K key, V value)
{
return invoke(key, CacheProcessors.remove(value));
}
/**
* Replaces the entry for the specified key only if it is
* currently mapped to some value.
*
* @param key key with which the specified value is associated
* @param value value to be associated with the specified key
*
* @return the previous value associated with the specified key, or
* {@code null} if there was no mapping for the key.
* (A {@code null} return can also indicate that the map
* previously associated {@code null} with the key,
* if the implementation supports null values.)
*/
public default CompletableFuture replace(K key, V value)
{
return invoke(key, CacheProcessors.replace(value));
}
/**
* Replaces the entry for the specified key only if currently
* mapped to the specified value.
*
* @param key key with which the specified value is associated
* @param oldValue value expected to be associated with the specified key
* @param newValue value to be associated with the specified key
*
* @return {@code true} if the value was replaced
*/
public default CompletableFuture replace(K key, V oldValue, V newValue)
{
return invoke(key, CacheProcessors.replace(oldValue, newValue));
}
/**
* Compute the value using the given mapping function and enter it into this
* map (unless {@code null}), if the specified key is not already associated
* with a value (or is mapped to {@code null}).
*
* If the mapping function returns {@code null} no mapping is recorded. If
* the function itself throws an (unchecked) exception, the exception is
* rethrown, and no mapping is recorded.
*
* The most common usage is to construct a new object serving as an initial
* mapped value or memoized result, as in:
*
* {@code map.computeIfAbsent(key, k -> new Value(f(k)));}
*
*
* Or to implement a multi-value map, {@code Map>},
* supporting multiple values per key:
*
* {@code map.computeIfAbsent(key, k -> new HashSet()).add(v);}
*
*
* Note that the previous example will not work as expected if this method
* is called on a distributed map, as the add method will be called
* on the client-side copy of the collection stored on the server.
*
* @param key key with which the specified value is to be associated
* @param mappingFunction the function to compute a value
*
* @return the current (existing or computed) value associated with
* the specified key, or null if the computed value is null
*/
public default CompletableFuture computeIfAbsent(
K key, Remote.Function mappingFunction)
{
return invoke(key, CacheProcessors.computeIfAbsent(mappingFunction));
}
/**
* Compute a new mapping given the key and its current mapped value, if the
* value for the specified key is present and non-null.
*
* If the function returns {@code null}, the mapping is removed. If the
* function itself throws an (unchecked) exception, the exception is
* rethrown, and the current mapping is left unchanged.
*
* @param key the key with which the specified value is to be
* associated
* @param remappingFunction the function to compute a value
*
* @return the new value associated with the specified key, or null if none
*/
public default CompletableFuture computeIfPresent(
K key, Remote.BiFunction remappingFunction)
{
return invoke(key, CacheProcessors.computeIfPresent(remappingFunction));
}
/**
* Compute a new mapping for the specified key and its current value.
*
* If the function returns {@code null}, the mapping is removed (or remains
* absent if initially absent). If the function itself throws an (unchecked)
* exception, the exception is rethrown, and the current mapping is left
* unchanged.
*
* @param key the key with which the computed value is to be
* associated
* @param remappingFunction the function to compute a value
*
* @return the new value associated with the specified key, or null if none
*/
public default CompletableFuture compute(K key,
Remote.BiFunction remappingFunction)
{
return invoke(key, CacheProcessors.compute(remappingFunction));
}
/**
* If the specified key is not already associated with a value or is
* associated with null, associates it with the given non-null value.
* Otherwise, replaces the associated value with the results of the given
* remapping function, or removes if the result is {@code null}.
*
* This method may be of use when combining multiple mapped values for a
* key. For example, to either create or append a {@code String msg} to a
* value mapping:
*
* {@code map.merge(key, msg, String::concat)}
*
*
* If the function returns {@code null} the mapping is removed. If the
* function itself throws an (unchecked) exception, the exception is
* rethrown, and the current mapping is left unchanged.
*
* @param key key with which the resulting value is to be
* associated
* @param value the non-null value to be merged with the
* existing value associated with the key or, if no
* existing value or a null value is associated
* with the key, to be associated with the key
* @param remappingFunction the function to recompute a value if present
*
* @return the new value associated with the specified key, or null if no
* value is associated with the key
*/
public default CompletableFuture merge(K key, V value,
Remote.BiFunction remappingFunction)
{
return invoke(key, CacheProcessors.merge(value, remappingFunction));
}
/**
* Replace each entry's value with the result of invoking the given function
* on that entry until all entries have been processed or the function
* throws an exception.
*
* @param function the function to apply to each entry
*/
public default CompletableFuture> replaceAll(
Remote.BiFunction function)
{
return replaceAll(AlwaysFilter.INSTANCE, function);
}
/**
* Replace each entry's value with the result of invoking the given function
* on that entry until all entries for the specified key set have been
* processed or the function throws an exception.
*
* @param collKeys the keys to process; these keys are not required to exist
* within the Map
* @param function the function to apply to each entry
*/
public default CompletableFuture> replaceAll(Collection collKeys,
Remote.BiFunction function)
{
return invokeAll(collKeys, CacheProcessors.replace(function));
}
/**
* Replace each entry's value with the result of invoking the given function
* on that entry until all entries selected by the specified filter have
* been processed or the function throws an exception.
*
* @param filter the filter that should be used to select entries
* @param function the function to apply to each entry
*/
public default CompletableFuture> replaceAll(Filter filter,
Remote.BiFunction function)
{
return invokeAll(filter, CacheProcessors.replace(function));
}
// ----- AsyncNamedCache.Option interface -------------------------------
/**
* An immutable option for creating and configuring {@link AsyncNamedCache}s.
*/
interface Option
{
}
// ---- option: OrderBy -------------------------------------------------
/**
* A configuration option which determines the ordering of async operations.
*/
public class OrderBy
implements Option
{
// ---- constructors ------------------------------------------------
/**
* Construct OrderBy instance.
*
* @param supplierOrderId the function that should be used to determine
* order id
*/
protected OrderBy(IntSupplier supplierOrderId)
{
m_supplierOrderId = supplierOrderId;
}
// ---- accessors ---------------------------------------------------
/**
* Return unit-of-order id.
*
* @return the unit-of-order id
*/
public int getOrderId()
{
return m_supplierOrderId.getAsInt();
}
// ---- static factory methods --------------------------------------
/**
* Return the order that will ensure that all operations invoked from
* the same client thread are executed on the server sequentially, using
* the same {@link AsynchronousAgent#getUnitOfOrderId unit-of-order}.
*
* This tends to provide best performance for fast, non-blocking
* operations and is the default order if the order is not specified.
*
* @return the default, thread-based ordering
*/
@Options.Default
public static OrderBy thread()
{
return THREAD;
}
/**
* Return the order that will allow the server to parallelize the
* execution of async operations across multiple threads, regardless of
* whether they were invoked from the same client thread or not.
*
* @return the order which allows the server to parallelize the
* execution of async operations across multiple threads
*/
public static OrderBy none()
{
return NONE;
}
/**
* Return the order that will use the specified unit-of-order for all
* async operations, regardless of whether they were invoked from the
* same client thread or not.
*
* @param nOrderId the unit-of-order to use for all operations
*
* @return the order which will use specified {@code nOrderId} for all
* operations
*/
public static OrderBy id(int nOrderId)
{
return new OrderBy(() -> nOrderId);
}
/**
* Return the order that will use the specified supplier to provide
* unit-of-order for each async operation.
*
* @param supplierOrderId the function that should be used to determine
* order id
*
* @return the order which will use specified function to provide
* unit-of-order for each async operation
*/
public static OrderBy custom(IntSupplier supplierOrderId)
{
return new OrderBy(supplierOrderId);
}
// ---- static members ----------------------------------------------
/**
* Random number generator.
*/
protected static final Random RANDOM = new Random();
/**
* The thread-order singleton.
*/
protected static final OrderBy THREAD = new OrderBy(() -> Thread.currentThread().hashCode());
/**
* The none-order singleton.
*/
protected static final OrderBy NONE = new OrderBy(RANDOM::nextInt);
// ---- data members ------------------------------------------------
/**
* A function that should be used to determine order id.
*/
protected final IntSupplier m_supplierOrderId;
}
// ----- constants ------------------------------------------------------
/**
* A trivial consumer.
*/
public static final Consumer