Class ConcurrentLinkedHashMap.Builder<K,V> 
java.lang.Object
org.apache.groovy.util.concurrent.concurrentlinkedhashmap.ConcurrentLinkedHashMap.Builder<K,V> 
- Enclosing class:
- ConcurrentLinkedHashMap<K,V> 
A builder that creates 
ConcurrentLinkedHashMap instances. It
 provides a flexible approach for constructing customized instances with
 a named parameter syntax. It can be used in the following manner:
 
 ConcurrentMap<Vertex, Set<Edge>> graph = new Builder<Vertex, Set<Edge>>()
     .maximumWeightedCapacity(5000)
     .weigher(Weighers.<Edge>set())
     .build();
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Constructor SummaryConstructors
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Method SummaryModifier and TypeMethodDescriptionbuild()Creates a newConcurrentLinkedHashMapinstance.concurrencyLevel(int concurrencyLevel) Specifies the estimated number of concurrently updating threads.initialCapacity(int initialCapacity) Specifies the initial capacity of the hash table (default 16).listener(EvictionListener<K, V> listener) Specifies an optional listener that is registered for notification when an entry is evicted.maximumWeightedCapacity(long capacity) Specifies the maximum weighted capacity to coerce the map to and may exceed it temporarily.weigher(EntryWeigher<? super K, ? super V> weigher) Specifies an algorithm to determine how many the units of capacity an entry consumes.Specifies an algorithm to determine how many the units of capacity a value consumes.
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Constructor Details- 
Builderpublic Builder()
 
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Method Details- 
initialCapacitySpecifies the initial capacity of the hash table (default 16). This is the number of key-value pairs that the hash table can hold before a resize operation is required.- Parameters:
- initialCapacity- the initial capacity used to size the hash table to accommodate this many entries.
- Throws:
- IllegalArgumentException- if the initialCapacity is negative
 
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maximumWeightedCapacitySpecifies the maximum weighted capacity to coerce the map to and may exceed it temporarily.- Parameters:
- capacity- the weighted threshold to bound the map by
- Throws:
- IllegalArgumentException- if the maximumWeightedCapacity is negative
 
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concurrencyLevelSpecifies the estimated number of concurrently updating threads. The implementation performs internal sizing to try to accommodate this many threads (default 16).- Parameters:
- concurrencyLevel- the estimated number of concurrently updating threads
- Throws:
- IllegalArgumentException- if the concurrencyLevel is less than or equal to zero
 
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listenerSpecifies an optional listener that is registered for notification when an entry is evicted.- Parameters:
- listener- the object to forward evicted entries to
- Throws:
- NullPointerException- if the listener is null
 
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weigherSpecifies an algorithm to determine how many the units of capacity a value consumes. The default algorithm bounds the map by the number of key-value pairs by giving each entry a weight of 1.- Parameters:
- weigher- the algorithm to determine a value's weight
- Throws:
- NullPointerException- if the weigher is null
 
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weigherSpecifies an algorithm to determine how many the units of capacity an entry consumes. The default algorithm bounds the map by the number of key-value pairs by giving each entry a weight of 1.- Parameters:
- weigher- the algorithm to determine an entry's weight
- Throws:
- NullPointerException- if the weigher is null
 
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buildCreates a newConcurrentLinkedHashMapinstance.- Throws:
- IllegalStateException- if the maximum weighted capacity was not set
 
 
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